Patent US6055029A successfully refreshed from Google Patents.
US6055029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backlighting system for a liquid crystal display including an integrally molded light guiding plate and frame with a deformation absorbing means
Assignee: Stanley Electric Co Ltd
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Filing: 1997-07-22
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Granted: 2000-04-25
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Expires: 2017-07-22
Abstract
Abstract Since a backlighting apparatus 1 for liquid crystal display is constituted such that a light guiding plate 2 and a frame 3 are molded together as a single unit provided with a deformation relaxation design, an attaching unit and parts, such as attaching feet and screws, for attaching the light guiding plate 2 to the frame 3 are not required, thereby making it possible to reduce the thickness and size of the backlighting apparatus 1 for liquid crystal display which has been restricted by the sizes of these parts.
Inventors
- 👤 Mikio Kurihara
- 👤 Fumihisa Hanzawa
- 👤 Yoji Oki
- 👤 Kazushige Ohta
- 👤 Takashi Noma
- 👤 Hidiaki Sasaya
- 👤 Tatsuo Fukui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:53
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0033; G02B6/005; G02B6/0051; G02B6/0081; G02B6/0086; G02B6/0088; G02B6/0093; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133615; G02F1/133308; G02F2201/00; G02F2201/50; G02F2201/503; G02F2201/54
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
133 words
A backlighting apparatus for a liquid crystal display comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together by one piece molding to form a single unit resistant to deformation in said single unit resulting from expansion due to environmental effects, wherein the light guiding plate has a flange portion having a thickness smaller than that of a central portion thereof and projecting from at least one side thereof, the frame has a flange receiving portion corresponding to the flange portion, and the flange portion is joined together at the flange receiving portion.
Claim 2
Dependent Claim
133 words
A backlighting apparatus for a liquid crystal display comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together by one piece molding to form a single unit resistant to deformation in said single unit resulting from expansion due to environmental effects, wherein the light guiding plate has a flange portion having a thickness smaller than that of a central portion thereof and projecting from at least one side thereof, the frame has a flange receiving portion corresponding to the flange portion, and the flange portion is joined together at the flange receiving portion.
Claim 3
Dependent Claim
118 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together to form a single unit resistant to deformation resulting from water absorption expansion in said single unit, and wherein materials for at least the light guiding plate and the frame are selected whose difference of water absorption coefficients of expansion is within a range of ±50%, relative to the water absorption coefficient of expansion of the material of the frame.
Claim 4
Dependent Claim
118 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together to form a single unit resistant to deformation resulting from water absorption expansion in said single unit, and wherein materials for at least the light guiding plate and the frame are selected whose difference of water absorption coefficients of expansion is within a range of ±50%, relative to the water absorption coefficient of expansion of the material of the frame.
Claim 5
Dependent Claim
102 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together to form a single unit resistant to deformation in said single unit resulting from expansion due to environmental effects, and including slits in at least one side of the frame, wherein the resistance to deformation is provided at least in part by the slits.
Claim 6
Dependent Claim
102 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together to form a single unit resistant to deformation in said single unit resulting from expansion due to environmental effects, and including slits in at least one side of the frame, wherein the resistance to deformation is provided at least in part by the slits.
Claim 7
Dependent Claim
110 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together to form a single unit resistant to deformation in said single unit resulting from expansion due to environmental effects, and including a plurality of through holes in the frame, extending in the thickness direction of the frame, wherein the resistance to deformation is provided at least in part by the through holes.
Claim 8
Dependent Claim
110 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together to form a single unit resistant to deformation in said single unit resulting from expansion due to environmental effects, and including a plurality of through holes in the frame, extending in the thickness direction of the frame, wherein the resistance to deformation is provided at least in part by the through holes.
Claim 9
Dependent Claim
229 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together to form a single unit resistant to deformation resulting from thermal or water absorption expansion in said single unit, and wherein materials for at least the light guiding plate and the frame are selected having a difference of thermal expansion coefficients within a range of ±50%, relative to the thermal expansion coefficient of the frame, materials for at least the light guiding plate and the frame are selected having a difference of water absorption coefficients of expansion within a range of ±50%, relative to the water absorption coefficient of expansion of the frame, the materials are an acrylic resin for the light guiding plate and wherein the frame comprises one of the set consisting of an acrylic resin, an alloy material of an acrylic resin and a polycarbonate resin, an alloy material of a polycarbonate resin and a vinyl resin, and a resin having a glass content of 20 to 40%, and wherein the diffusion sheet is attached to one of the set of the light guiding plate and the frame.
Claim 10
Dependent Claim
229 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together to form a single unit resistant to deformation resulting from thermal or water absorption expansion in said single unit, and wherein materials for at least the light guiding plate and the frame are selected having a difference of thermal expansion coefficients within a range of ±50%, relative to the thermal expansion coefficient of the frame, materials for at least the light guiding plate and the frame are selected having a difference of water absorption coefficients of expansion within a range of ±50%, relative to the water absorption coefficient of expansion of the frame, the materials are an acrylic resin for the light guiding plate and wherein the frame comprises one of the set consisting of an acrylic resin, an alloy material of an acrylic resin and a polycarbonate resin, an alloy material of a polycarbonate resin and a vinyl resin, and a resin having a glass content of 20 to 40%, and wherein the diffusion sheet is attached to one of the set of the light guiding plate and the frame.
Claim 11
Dependent Claim
120 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together to form a single unit resistant to deformation resulting from water absorption expansion in said single unit, and wherein materials for at least the light guiding plate and the frame are selected whose difference of water absorption coefficients of expansion is within a range of ±50%, relative to the water absorption coefficient of expansion of the material of the light guiding plate.
Claim 12
Dependent Claim
120 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together to form a single unit resistant to deformation resulting from water absorption expansion in said single unit, and wherein materials for at least the light guiding plate and the frame are selected whose difference of water absorption coefficients of expansion is within a range of ±50%, relative to the water absorption coefficient of expansion of the material of the light guiding plate.
Claim 13
Dependent Claim
156 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together by one piece molding to form a single unit resistant to deformation in said single unit resulting from expansion due to environmental effects, wherein the light guiding plate has a flange portion having a thickness smaller than that of a central portion thereof and projecting from at least one side thereof, the frame has a flange receiving portion corresponding to the flange portion, and wherein the flange portion is joined to the flange receiving portion such that a space is present between an end surface of the light guiding plate and an inner end surface of the frame.
Claim 14
Dependent Claim
156 words
A backlighting apparatus for a liquid crystal display, comprising: a substantially transparent light guiding plate having a substantially rectangular shape; a frame formed to surround at least two sides of the light guiding plate; and a diffusion sheet covering an illuminated surface of the light guiding plate, wherein the light guiding plate and the frame are molded together by one piece molding to form a single unit resistant to deformation in said single unit resulting from expansion due to environmental effects, wherein the light guiding plate has a flange portion having a thickness smaller than that of a central portion thereof and projecting from at least one side thereof, the frame has a flange receiving portion corresponding to the flange portion, and wherein the flange portion is joined to the flange receiving portion such that a space is present between an end surface of the light guiding plate and an inner end surface of the frame.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-04-25 | 2003-10-25 | 2004-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-25 | 2007-10-25 | 2008-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-25 | 2011-10-25 | 2012-04-25 | $7700.00 | Window Closed / Lapsed |