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US5317430A Expired / Lapsed US ⏱️ 0.0 years remaining

Liquid crystal display device having transparent optical conductor integral with opaque support on end surfaces with no light source

Assignee: Sharp Corp
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Filing: 1992-12-09
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Granted: 1994-05-31
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Expires: 2012-12-09
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Abstract

Abstract A transparent optical conductor is disposed rearwardly of a liquid crystal device panel and an opaque support is formed integrally with the transparent optical conductor so as to merge into end surfaces thereof where no tubular light source is disposed. The opaque support and transparent optical conductor need not be disposed back to back in order to fix individual members of a liquid crystal display device.

Inventors

  • 👤 Shinichi Uratani

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 10:32
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0081; G02B6/0086; G02B6/0091; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133615; G02B6/0013; G02B6/0023; G02B6/0031

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 153 words
A liquid crystal display device comprising a liquid crystal device panel and a lighting unit for backlighting of said liquid crystal device panel, said lighting unit including a transparent optical conductor disposed in parallel with said liquid crystal device panel rearwardly thereof, an opaque support for supporting said transparent optical conductor in relation to said liquid crystal device panel, a tubular light source disposed at one end of said transparent optical conductor, and a light source cover and reflector disposed near said tubular light source and adapted to reflect light, emitted from said tubular light source and heading for the outside, toward said transparent optical conductor, wherein said opaque support is formed integrally with said transparent optical conductor so as to merge into the remaining end surfaces of said transparent optical conductor where no tubular light source is disposed, and said light source cover and reflector is formed integrally with said opaque support.
Claim 2
Dependent Claim 153 words
A liquid crystal display device comprising a liquid crystal device panel and a lighting unit for backlighting of said liquid crystal device panel, said lighting unit including a transparent optical conductor disposed in parallel with said liquid crystal device panel rearwardly thereof, an opaque support for supporting said transparent optical conductor in relation to said liquid crystal device panel, a tubular light source disposed at one end of said transparent optical conductor, and a light source cover and reflector disposed near said tubular light source and adapted to reflect light, emitted from said tubular light source and heading for the outside, toward said transparent optical conductor, wherein said opaque support is formed integrally with said transparent optical conductor so as to merge into the remaining end surfaces of said transparent optical conductor where no tubular light source is disposed, and said light source cover and reflector is formed integrally with said opaque support.
Claim 3
Dependent Claim 37 words
A liquid crystal display device according to claim 1 wherein said transparent optical conductor is formed of a plate-like acryl resin material and said opaque support is formed of an opaque plastic material of low thermal conductivity.
Claim 4
Dependent Claim 40 words
A liquid crystal display device according to claim 2 wherein a light diffusion sheet is interposed between said transparent optical conductor and said liquid crystal device panel, and a reflector sheet is disposed on the back of said opaque support.

References Cited (Backward Citations)

US3864905A Cited
US4011001A Cited
US4118111A Cited
US4618216A Cited
JPS64987A Cited
US4909604A Cited
US5046826A Cited
US4860171A Cited
EP0355064A2 Cited
JPH03171009A Cited
US5161873A Cited
US5146354A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1997-05-30 1997-11-29 1998-05-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2001-05-30 2001-11-29 2002-05-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2005-05-30 2005-11-29 2006-05-31 $7700.00 Window Closed / Lapsed

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