Patent US5592332A successfully refreshed from Google Patents.
US5592332A
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Renticular lens, surface light source, and liquid crystal display apparatus
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1993-12-27
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Granted: 1997-01-07
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Expires: 2013-12-27
Abstract
Abstract A lenticular lens has a light transmitting substrate and a plurality of lens elements formed on the light transmitting substrate. The lens elements are defined in such a way that ridges thereof are aligned in parallel with each other, wherein 30°≦θ 10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the one surface in the case that when light is entered from the opposite surface and transmitted from the one surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe. The intensity of side lobes which causes light loss and light stray can be remarkably reduced. Light can be equally and isotropically focused on in a predetermined diffusing angle range.
Inventors
- 👤 Toshikazu Nishio
- 👤 Yoshiyuki Yamashita
- 👤 Hiroyuki Amemiya
- 👤 Michiko Takeuchi
- 👤 Nobu Masubuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:28
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625; G02; G02B; G02B3/00; G02B3/0006; G02B3/0012; G02B3/0031; G02B3/0037; G02B3/005; G02B3/0062; G02B5/00; G02B5/04; G02B5/045; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133602; G02F1/133606; G02F1/133607
Claims Analysis
Total Claims: 109
Claim 1
Independent Claim
141 words
A lenticular lens, comprising: a light transmitting substrate having one a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ 10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe.
Claim 2
Dependent Claim
141 words
A lenticular lens, comprising: a light transmitting substrate having one a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ 10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe.
Claim 3
Dependent Claim
35 words
The lenticular lens, according to claim 1, wherein each of said lens element has a triangular prism shape, the vertical angle of each of said lens elements being in the range from 95° to 110°.
Claim 4
Dependent Claim
49 words
The lenticular lens, according to claim 2, further comprising: a second light transmitting substrate having two flat surfaces, wherein said lens elements are layered over one flat surface of said second light transmitting substrate, the vertical angle of said lens elements being in the range from 95° to 110°.
Claim 5
Dependent Claim
26 words
The lenticular lens, according to claim 3, wherein at least one of said light transmitting substrate and said lens elements has a light isotopic diffusing characteristic.
Claim 6
Dependent Claim
28 words
The lenticular lens, according to claim 3, wherein a light isotopic diffusing layer is formed on one side of said second light transmitting substrate or said lens elements.
Claim 7
Dependent Claim
55 words
The lenticular lens, according to claim 1, wherein said lens elements have concave shapes and are continuously formed in such a way that the shape of the main cross section which is cut perpendicular to the longer axis accords with a quadratic curve, a Rankine egg shape, or a curve expressed by a linear function.
Claim 8
Dependent Claim
33 words
The lenticular lens, according to claim 6, further comprising: a second light transmitting substrate having two flat surfaces, wherein said lens elements are elongated on one surface of said second light transmitting substrate.
Claim 9
Dependent Claim
26 words
The lenticular lens, according to claim 7, wherein at least one of said light transmitting substrate and said lens elements has a light isotopic diffusing characteristic.
Claim 10
Dependent Claim
28 words
The lenticular lens according to claim 7, wherein a light isotopic diffusing layer is formed on one side of said second light transmitting substrate or said lens elements.
Claim 11
Dependent Claim
76 words
The lenticular lens, according to claim 1, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements.
Claim 12
Dependent Claim
73 words
The lenticular lens, according to claim 1, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 slope of asymptotic line≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements.
Claim 13
Dependent Claim
80 words
The lenticular lens, according to claim 1, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50.
Claim 14
Dependent Claim
232 words
A surface light source, comprising: a light guiding plate made of a light transmitting plate; a linear light source arranged adjacent to at least one side edge of said light guiding plate; a light isotopic diffusing layer layered on the front surface of said light guiding plate; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ 10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, and wherein each of said lens elements has a triangular prism shape, the vertical angle of each of said lens elements being in the range from 95° to 110°, wherein the front surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 15
Dependent Claim
232 words
A surface light source, comprising: a light guiding plate made of a light transmitting plate; a linear light source arranged adjacent to at least one side edge of said light guiding plate; a light isotopic diffusing layer layered on the front surface of said light guiding plate; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ 10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, and wherein each of said lens elements has a triangular prism shape, the vertical angle of each of said lens elements being in the range from 95° to 110°, wherein the front surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 16
Dependent Claim
203 words
A liquid crystal display apparatus having a rear surface, comprising: a transmission type liquid crystal display device; and a surface light source, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, and wherein each of said lens elements has a triangular prism shape, the vertical angle of each of said lens elements being in the range from 95° to 110°, said surface light source being disposed on the rear surface of said liquid crystal display device.
Claim 17
Dependent Claim
203 words
A liquid crystal display apparatus having a rear surface, comprising: a transmission type liquid crystal display device; and a surface light source, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, and wherein each of said lens elements has a triangular prism shape, the vertical angle of each of said lens elements being in the range from 95° to 110°, said surface light source being disposed on the rear surface of said liquid crystal display device.
Claim 18
Dependent Claim
251 words
A surface light source, comprising: a light guiding member formed of a light transmitting plate; a linear light source arranged adjacent to at least one side edge of said light guiding plate; a light isotopic diffusing layer layered on the front surface of said light guiding plate; and a lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein aid lens elements have concave shapes and are continuously formed in such a way that the shape of the main cross section which is cut perpendicular to the longer axis accords with a quadratic curve, a Rankine egg shape, or a curve expressed by a linear function, wherein the front surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 19
Dependent Claim
251 words
A surface light source, comprising: a light guiding member formed of a light transmitting plate; a linear light source arranged adjacent to at least one side edge of said light guiding plate; a light isotopic diffusing layer layered on the front surface of said light guiding plate; and a lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein aid lens elements have concave shapes and are continuously formed in such a way that the shape of the main cross section which is cut perpendicular to the longer axis accords with a quadratic curve, a Rankine egg shape, or a curve expressed by a linear function, wherein the front surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 20
Dependent Claim
240 words
A surface light source, comprising: at least one point light source; a lamp house adapted to cover said light source and having a surface with an opening; and a lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein aid lens elements have concave shapes and are continuously formed in such a way that the shape of the main cross section which is cut perpendicular to the longer axis accords with a quadratic curve, a Rankine egg shape, or a curve expressed by a linear function, said lenticular lens being adapted to cover said opening, wherein the front surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 21
Dependent Claim
240 words
A surface light source, comprising: at least one point light source; a lamp house adapted to cover said light source and having a surface with an opening; and a lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein aid lens elements have concave shapes and are continuously formed in such a way that the shape of the main cross section which is cut perpendicular to the longer axis accords with a quadratic curve, a Rankine egg shape, or a curve expressed by a linear function, said lenticular lens being adapted to cover said opening, wherein the front surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 22
Dependent Claim
269 words
A liquid crystal display apparatus having a rear surface, comprising: a transmission type liquid crystal display device; and a surface light source comprising: a light guiding member formed of a light transmitting plate; a linear light source arranged adjacent to at least one side edge of said light guiding plate; a light isotopic diffusing layer layered on the front surface of said light guiding plate; and a lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein aid lens elements have concave shapes and are continuously formed in such a way that the shape of the main cross section which is cut perpendicular to the longer axis accords with a quadratic curve, a Rankine egg shape, or a curve expressed by a linear function, wherein the front surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 23
Dependent Claim
269 words
A liquid crystal display apparatus having a rear surface, comprising: a transmission type liquid crystal display device; and a surface light source comprising: a light guiding member formed of a light transmitting plate; a linear light source arranged adjacent to at least one side edge of said light guiding plate; a light isotopic diffusing layer layered on the front surface of said light guiding plate; and a lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein aid lens elements have concave shapes and are continuously formed in such a way that the shape of the main cross section which is cut perpendicular to the longer axis accords with a quadratic curve, a Rankine egg shape, or a curve expressed by a linear function, wherein the front surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 24
Dependent Claim
236 words
A lens sheet having a mat surface whose surface roughness is up to 100 μm, and the mat surface is formed on the non-lens surface of a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens element.
Claim 25
Dependent Claim
236 words
A lens sheet having a mat surface whose surface roughness is up to 100 μm, and the mat surface is formed on the non-lens surface of a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens element.
Claim 26
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis 0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 27
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis 0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 28
Dependent Claim
120 words
The surface light source according to claim 19, wherein the light source is formed of a light transmitting plate having a smooth surface whose surface roughness is equal to or less than the wavelength of the light of a light source, the above-mentioned lenticular lens sheet has a fine mat surface whose surface roughness is equal to or larger than the wavelength of the light of the light source, and the fine mat surface is layered on the smooth surface of the light guiding member, whereby, a cavity with a depth of equal to or larger than the wavelength of the light of the light source is disposed at least partly between the light guiding member and the lens sheet.
Claim 29
Dependent Claim
152 words
The surface light source according to claim 19, wherein the light source has a light guiding member which is formed of a light transmitting plate having a smooth surface whose surface roughness is equal to or less than the wavelength of the light of a light source, a light diffusing layer is disposed between the rear surface of the above-mentioned lenticular lens sheet and the front surface of the light guiding member, and the light diffusing layer has fine mat surfaces whose surface roughness is equal to or larger than the wavelength of the light of the light source, whereby, two cavities whose depth is equal to or larger than the wavelength of the light of the light source are formed at least partly between the front surface of the light guiding member and the light diffusing layer and between the light diffusing layer and the rear surface of the lens sheet.
Claim 30
Dependent Claim
295 words
A display apparatus, comprising: a the surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member; and a transmission type display device which is layered over the light emitting urface of the surface light source.
Claim 31
Dependent Claim
295 words
A display apparatus, comprising: a the surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member; and a transmission type display device which is layered over the light emitting urface of the surface light source.
Claim 32
Dependent Claim
265 words
A surface light source, comprising: at least one linear light source having a lower surface; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 a length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements covering the opening of said lamp house.
Claim 33
Dependent Claim
265 words
A surface light source, comprising: at least one linear light source having a lower surface; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 a length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements covering the opening of said lamp house.
Claim 34
Dependent Claim
287 words
A display apparatus, comprising: a surface light source comprising: at least one linear light source having a lower surface; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements covering the opening of said lamp house; and a transmission type display device that is layered over the light emitting surface of the surface light source.
Claim 35
Dependent Claim
287 words
A display apparatus, comprising: a surface light source comprising: at least one linear light source having a lower surface; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements covering the opening of said lamp house; and a transmission type display device that is layered over the light emitting surface of the surface light source.
Claim 36
Dependent Claim
233 words
A lens sheet, having a mat surface whose surface roughness is up to 100 μm, and the mat surface is formed on the non-lens surface of a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements.
Claim 37
Dependent Claim
233 words
A lens sheet, having a mat surface whose surface roughness is up to 100 μm, and the mat surface is formed on the non-lens surface of a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements.
Claim 38
Dependent Claim
269 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 a slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 39
Dependent Claim
269 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 a slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 40
Dependent Claim
291 words
A display apparatus, comprising: a surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member; and a transmission type display device that is layered over the light emitting surface of the surface light source.
Claim 41
Dependent Claim
291 words
A display apparatus, comprising: a surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member; and a transmission type display device that is layered over the light emitting surface of the surface light source.
Claim 42
Dependent Claim
259 words
A surface light source, comprising: at least one linear or point light source; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements covering the opening of said lamp house.
Claim 43
Dependent Claim
259 words
A surface light source, comprising: at least one linear or point light source; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements covering the opening of said lamp house.
Claim 44
Dependent Claim
282 words
A display apparatus, comprising: a surface light source comprising: at least one linear or point light source; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements covering the opening of said lamp house; and a transmission type display device that is layered over the light emitting surface of the surface light source.
Claim 45
Dependent Claim
282 words
A display apparatus, comprising: a surface light source comprising: at least one linear or point light source; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements covering the opening of said lamp house; and a transmission type display device that is layered over the light emitting surface of the surface light source.
Claim 46
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 47
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 48
Dependent Claim
30 words
The surface light source, according to claim 30, wherein a light diffusing sheet between the opposite surface of the lens surface of the lenticular lens and the light guiding member.
Claim 49
Dependent Claim
81 words
The surface light source, according to claim 31, wherein the surface light source has a random fine mat pattern at least on one surface of the light diffusing sheet, the surface roughness of the mat pattern is in the range from the wavelength of the light of the light source to 100 μm, and the surface roughness of the front surface of the light guiding plate is equal to or less than the wavelength of the light of the light source.
Claim 50
Dependent Claim
297 words
A display apparatus, comprising: a surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member; and a transmission type display device that is layered over the light emitting surface of the surface light source.
Claim 51
Dependent Claim
297 words
A display apparatus, comprising: a surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member; and a transmission type display device that is layered over the light emitting surface of the surface light source.
Claim 52
Dependent Claim
267 words
A surface light source, comprising: at least one linear light source having a lower surface; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 covering the opening of said lamp house.
Claim 53
Dependent Claim
267 words
A surface light source, comprising: at least one linear light source having a lower surface; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 covering the opening of said lamp house.
Claim 54
Dependent Claim
139 words
A lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having convex shaped cross sections, and defined in such a way that ridges thereof are aligned an parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe.
Claim 55
Dependent Claim
139 words
A lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having convex shaped cross sections, and defined in such a way that ridges thereof are aligned an parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe.
Claim 56
Dependent Claim
231 words
A surface light source comprising: a light guiding plate made of a rectangular parallelpiped cavity; a linear light source arranged adjacent to at least one side edge of said light guiding plate; a light isotopic diffusing layer layered on the front surface of said light guiding plate; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity o the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe wherein each of said lens elements has a triangular prism shape, the vertical angle of each of said lens elements being in the range from 95° to 110°, wherein the front surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 57
Dependent Claim
231 words
A surface light source comprising: a light guiding plate made of a rectangular parallelpiped cavity; a linear light source arranged adjacent to at least one side edge of said light guiding plate; a light isotopic diffusing layer layered on the front surface of said light guiding plate; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity o the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe wherein each of said lens elements has a triangular prism shape, the vertical angle of each of said lens elements being in the range from 95° to 110°, wherein the front surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 58
Dependent Claim
251 words
A surface light source comprising: a light guiding member formed of a rectangular parallelpiped cavity; a linear light source arranged adjacent to at least one side edge of said light guiding plate; a light isotopic diffusing layer layered on the first surface of said light guiding plate; and a lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein aid lens elements have concave shapes and are continuously formed in such a way that the shape of the main cross section which is cut perpendicular to the longer axis accords with a quadratic curve, a Rankine egg shape, or a curve expressed by a linear function, wherein the first surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 59
Dependent Claim
251 words
A surface light source comprising: a light guiding member formed of a rectangular parallelpiped cavity; a linear light source arranged adjacent to at least one side edge of said light guiding plate; a light isotopic diffusing layer layered on the first surface of said light guiding plate; and a lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein aid lens elements have concave shapes and are continuously formed in such a way that the shape of the main cross section which is cut perpendicular to the longer axis accords with a quadratic curve, a Rankine egg shape, or a curve expressed by a linear function, wherein the first surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 60
Dependent Claim
240 words
A surface light source, comprising: at least one linear light source; a lamp house adapted to cover said light source and having a surface with an opening; and a lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein aid lens elements have concave shapes and are continuously formed in such a way that the shape of the main cross section which is cut perpendicular to the longer axis accords with a quadratic curve, a Rankine egg shape, or a curve expressed by a linear function, said lenticular lens being adapted to cover said opening, wherein the first surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 61
Dependent Claim
240 words
A surface light source, comprising: at least one linear light source; a lamp house adapted to cover said light source and having a surface with an opening; and a lenticular lens, comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein aid lens elements have concave shapes and are continuously formed in such a way that the shape of the main cross section which is cut perpendicular to the longer axis accords with a quadratic curve, a Rankine egg shape, or a curve expressed by a linear function, said lenticular lens being adapted to cover said opening, wherein the first surface of said lenticular lens is defined on a diffused light emitting surface.
Claim 62
Dependent Claim
236 words
A lens sheet, having a mat surface whose surface roughness is up to 100 μm, and the mat surface is formed on the non-lens surface of a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements.
Claim 63
Dependent Claim
236 words
A lens sheet, having a mat surface whose surface roughness is up to 100 μm, and the mat surface is formed on the non-lens surface of a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements.
Claim 64
Dependent Claim
233 words
A lens sheet, having a mat surface whose surface roughness is up to 100 μm, and the mat surface is formed on the non-lens surface of a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements.
Claim 65
Dependent Claim
233 words
A lens sheet, having a mat surface whose surface roughness is up to 100 μm, and the mat surface is formed on the non-lens surface of a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements.
Claim 66
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 67
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 68
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 69
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 70
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 71
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 72
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 73
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 74
Dependent Claim
270 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 75
Dependent Claim
270 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 76
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 77
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 78
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 79
Dependent Claim
271 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 80
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 81
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 82
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 83
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 84
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 85
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 86
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 87
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 88
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 89
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 90
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 91
Dependent Claim
268 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 92
Dependent Claim
270 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 93
Dependent Claim
270 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have a have a hyperbolic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧slope of asymptotic line ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements layered on a light emitting surface of the light guiding member.
Claim 94
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 95
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 96
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting .depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 97
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting .depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 98
Dependent Claim
261 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, layered on a light emitting surface of the light guiding member.
Claim 99
Dependent Claim
261 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, layered on a light emitting surface of the light guiding member.
Claim 100
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 101
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 102
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 103
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a light transmitting plate; at least one point light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a convex lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 104
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20% where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 105
Dependent Claim
274 words
A surface light source comprising: a light guiding member made of a rectangular parallelpiped cavity; at least one linear light source arranged on at least one side edge of the light guiding member; at least one light reflecting layer disposed on the rear surface of the light guiding member; and a concave lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20% where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 layered on a light emitting surface of the light guiding member.
Claim 106
Dependent Claim
264 words
A surface light source comprising: at least one point light source having a lower surface; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements covering the opening of said lamp house.
Claim 107
Dependent Claim
264 words
A surface light source comprising: at least one point light source having a lower surface; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate, having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% ≦100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the following relation being satisfied: 1.1×n/(n.sup.2 -1).sup.1/2 ≧length of longer axis/length of shorter axis ≧0.9×n/(n.sup.2 -1).sup.1/2 where n is the refractive index of said lens elements covering the opening of said lamp house.
Claim 108
Dependent Claim
267 words
A surface light source, comprising: at least one point light source having a lower surface; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 covering the opening of said lamp house.
Claim 109
Dependent Claim
267 words
A surface light source, comprising: at least one point light source having a lower surface; a lamp house that covers the lower surface and side surface of the light source and has an opening on the upper surface of the light source and an inner reflecting surface; and a lenticular lens comprising: a light transmitting substrate having a first surface and a second surface opposite to said first surface; and a plurality of lens elements elongated on the first surface of said light transmitting substrate having concave shaped cross sections, and defined in such a way that ridges thereof are aligned in parallel, wherein 30°≦θ.sub.10% 100° and R≦20%, where θ 10% is a diffusing angle range with respect to normal of the first surface in the case that when light is entered from the second surface or first surface and transmitted from the first surface or second surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe, wherein said lens elements have an elliptic shape and are defined in such a way that ridges thereof are aligned in parallel with each other, the longer axis direction of said lens elements according with the normal direction of a light emitting surface thereof, the cutting depth and the refractive index of said lens elements being given by: 1.40≦refractive index≦1.6, 1.20≦length of longer axis/length of shorter axis≦2.00, and 0.1≦cutting depth/length of longer axis≦0.50 covering the opening of said lamp house.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-07 | 2000-07-08 | 2001-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-07 | 2004-07-08 | 2005-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-07 | 2008-07-08 | 2009-01-07 | $7700.00 | Window Closed / Lapsed |