EP0308828A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Illuminator and display panel employing it
Assignee: Canon Inc
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Filing: 1988-09-16
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Granted: —
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Expires: 2008-09-16
Abstract
Abstract An illuminator comprises a) a light-transmitting member (102-1) formed of a plurality of transparent sheet-like members (108) laminated each other, b) a light source (101-1) disposed on the light-incoming side of the light-transmitting member (102-1), c) a light-reflecting member (103-3) disposed on the light-outgoing side of the light-transmitting member (102-1) at an oblique angle to the transparent sheet-like members (108), and d) a sheet-like member (104-1) having a scattering area at which a light ray reflected on the light-reflecting member (103-3) is converted into scattered light and coming into surface contact with the light-transmitting member (102-1).
Inventors
- 👤 Hirofumi Iwamoto
- 👤 Takashi Yamamoto
- 👤 Yoshihiro Onitsuka
- 👤 Tadashi Kizuki Haitsu 1-201 82 Mihara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 17:38
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0033; G02B6/0035; G02B6/0045; G02B6/0046; G02B6/005; G02B6/0055; G02B6/0065; G02B6/0066; G02B6/0068; G02B6/0081; G02B6/0093
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
86 words
An illuminator comprising a) a light-transmitting member formed of a plurality of transparent sheet-like members laminated each other, b) a light source disposed on the light-incoming side of said light-transmitting member, c) a light-reflecting member disposed on the light-outgoing side of said light-transmitting member at an oblique angle to said transparent sheet-like members, and d) a sheet-like member having a scattering area at which a light ray reflected on said light-reflecting member is converted into scattered light and coming into surface contact with said light-transmitting member.
Claim 2
Dependent Claim
86 words
An illuminator comprising a) a light-transmitting member formed of a plurality of transparent sheet-like members laminated each other, b) a light source disposed on the light-incoming side of said light-transmitting member, c) a light-reflecting member disposed on the light-outgoing side of said light-transmitting member at an oblique angle to said transparent sheet-like members, and d) a sheet-like member having a scattering area at which a light ray reflected on said light-reflecting member is converted into scattered light and coming into surface contact with said light-transmitting member.
Claim 3
Dependent Claim
26 words
The illuminator of Claim 1, wherein said sheet-like member in d) comprises a diffusion sheet comprising a milk-white light-transmissive substance, and a transparent or translucent member.
Claim 4
Dependent Claim
23 words
The illuminator of Claim 1, wherein said sheet-like member in d) comprises a transparent or translucent member, whose light-outgoing surface has been roughened.
Claim 5
Dependent Claim
34 words
The illuminator of Claim 1, wherein said sheet-like member in d) is disposed on the light- outgoing side of said light-transmitting member, and part of said sheet-like member is disposed around said light source.
Claim 6
Dependent Claim
50 words
The illuminator of Claim 1, wherein said light-transmitting member, said light source, said light-reflecting member and said sheet-like member in d) are supported by a housing, and the undersurface of said housing is formed in the form of a taper or convex shape and provided with a plurality of projections.
Claim 7
Dependent Claim
15 words
The illuminator of Claim 1, wherein said light source comprises one or two light source(s).
Claim 8
Dependent Claim
92 words
An illuminator having a light source and a light-scattering member and illuminating from the back surface an object to be illuminated, wherein said light source is disposed in a hollow space formed in a light-transmitting member, said light-scattering member is disposed between said light source and said object to be illuminated, said light-transmitting member is formed of a solid material capable of propagating a light ray outgone from said light source toward said light-scattering member, and said hollow space is provided within an effective illumination region of said object to be illuminated.
Claim 9
Dependent Claim
92 words
An illuminator having a light source and a light-scattering member and illuminating from the back surface an object to be illuminated, wherein said light source is disposed in a hollow space formed in a light-transmitting member, said light-scattering member is disposed between said light source and said object to be illuminated, said light-transmitting member is formed of a solid material capable of propagating a light ray outgone from said light source toward said light-scattering member, and said hollow space is provided within an effective illumination region of said object to be illuminated.
Claim 10
Dependent Claim
17 words
The illuminator of Claim 7, wherein the light-outgoing surface of said light-transmitting member comprises a light-scattering member.
Claim 11
Dependent Claim
15 words
The illuminator of Claim 7, wherein said light-transmitting member and light-scattering member are independently disposed.
Claim 12
Dependent Claim
32 words
The illuminator of Claim 7, wherein said light-transmitting member and light-scattering member are independently disposed, and a light screen having opaque portions is closely fixed between said light-transmitting member and light-scattering member.
Claim 13
Dependent Claim
45 words
The illuminator of Claim 7, wherein said light-transmitting member, said light source and said light-reflecting member are supported by a housing, and the bottom of said housing is formed in the form of a taper or convex shape and provided with a plurality of projections.
Claim 14
Dependent Claim
17 words
The illuminator of Claim 7, wherein said light sources comprises one or two light source(s) or more.
Claim 15
Dependent Claim
96 words
A display panel comprising; an illuminator comprising a) a light-transmitting member formed of a plurality of transparent sheet-like members laminated each other, b) a light source disposed on the light-incoming side of said light-transmitting member, c) a light-reflecting member disposed on the light-outgoing side of said light-transmitting member at an oblique angle to said transparent sheet-like members, and d) a sheet-like member having a scattering area at which a light ray reflected on said light-reflecting member is converted into scattered light and coming into surface contact with said light-transmitting member; and a liquid crystal display panel.
Claim 16
Dependent Claim
96 words
A display panel comprising; an illuminator comprising a) a light-transmitting member formed of a plurality of transparent sheet-like members laminated each other, b) a light source disposed on the light-incoming side of said light-transmitting member, c) a light-reflecting member disposed on the light-outgoing side of said light-transmitting member at an oblique angle to said transparent sheet-like members, and d) a sheet-like member having a scattering area at which a light ray reflected on said light-reflecting member is converted into scattered light and coming into surface contact with said light-transmitting member; and a liquid crystal display panel.
Claim 17
Dependent Claim
15 words
The display panel of Claim 13, wherein said liquid crystal comprises a ferroelectric liquid crystal.
Claim 18
Dependent Claim
17 words
The display panel of Claim 14, wherein said ferroelectric liquid crystal comprises a chiral smectic liquid crystal.
Claim 19
Dependent Claim
42 words
The display panel of Claim 13, wherein the film thickness of said chiral smectic liquid crystal is set to a film thickness sufficiently small to unwind a helical structure inherent in the chiral smectic liquid crystal when no electric field is formed.
Claim 20
Dependent Claim
85 words
A display device comprising an illuminator and a display panel, wherein; said illuminator comprises a light source, a light-scattering member and a light-transmitting member; said light source is disposed in a hollow space formed in the light-transmitting member; said light-scattering member is disposed between said light source and said display panel; and said light-transmitting member is formed of a solid material capable of propagating a light ray outgone from the light source toward said light-scattering member; said display panel being illuminated from the back surface.
Claim 21
Dependent Claim
85 words
A display device comprising an illuminator and a display panel, wherein; said illuminator comprises a light source, a light-scattering member and a light-transmitting member; said light source is disposed in a hollow space formed in the light-transmitting member; said light-scattering member is disposed between said light source and said display panel; and said light-transmitting member is formed of a solid material capable of propagating a light ray outgone from the light source toward said light-scattering member; said display panel being illuminated from the back surface.
Claim 22
Dependent Claim
15 words
The display device of Claim 17, wherein said display panel has an optically modulating substance.
Claim 23
Dependent Claim
15 words
The display device of Claim 17, wherein said optically modulating substance comprises a liquid crystal.
Claim 24
Dependent Claim
15 words
The display device of Claim 19, wherein said liquid crystal comprises a ferroelectric liquid crystal.
Claim 25
Dependent Claim
17 words
The display device of Claim 20, wherein said ferroelectric liquid crystal comprises a chiral smectic liquid crystal.
Claim 26
Dependent Claim
43 words
The display device of Claim 21, wherein the film thickness of said chiral smectic liquid crystal has been set to a film thickness sufficiently small to unwind a helical structure inherent in the chiral smectic liquid crystal when no electric field is formed.
References Cited (Backward Citations)
No citation records indexed.
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