Patent US5280372A successfully refreshed from Google Patents.
US5280372A
Expired / Lapsed
US
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Liquid crystal display device
Assignee: Sharp Corp
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Filing: 1992-09-03
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Granted: 1994-01-18
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Expires: 2012-09-03
Abstract
Abstract A liquid crystal display device with a built-in back light device for illuminating a liquid crystal element. The back light device includes a light transmitting plate disposed behind the liquid crystal element, a light source disposed in the vicinity of one end of the light transmitting plate, a reflector for reflecting light from the light source towards the light transmitting plate, the reflector being integrated to the light source, and a slide mechanism for allowing the reflector to be slidably detached from the light transmitting plate.
Inventors
- 👤 Kenji Horiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:31
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; F; F21; F21V; F21V19/00; F21V19/04; G02B6/0013; G02B6/0023; G02B6/0031; G02B6/0083; G02F1/1335; G02F1/1336; G02F1/133615
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A liquid crystal display device with a built-in back light device for illuminating a liquid crystal element, said back light device comprising: a light transmitting plate disposed behind said liquid crystal element; a cylindrical light source disposed in the vicinity of one end of said light transmitting plate and extending along said one end; a reflector for reflecting light from said cylindrical light source towards said light transmitting plate, said reflector being integrated to said cylindrical light source and holding a lead wire extending along said cylindrical light source; and a slide mechanism for allowing said reflector to be slidably detached from said light transmitting plate, said cylindrical light source having an end to be coupled to a power source and another end to be coupled to said power source through said lead wire.
Claim 2
Dependent Claim
134 words
A liquid crystal display device with a built-in back light device for illuminating a liquid crystal element, said back light device comprising: a light transmitting plate disposed behind said liquid crystal element; a cylindrical light source disposed in the vicinity of one end of said light transmitting plate and extending along said one end; a reflector for reflecting light from said cylindrical light source towards said light transmitting plate, said reflector being integrated to said cylindrical light source and holding a lead wire extending along said cylindrical light source; and a slide mechanism for allowing said reflector to be slidably detached from said light transmitting plate, said cylindrical light source having an end to be coupled to a power source and another end to be coupled to said power source through said lead wire.
Claim 3
Dependent Claim
23 words
A liquid crystal display device according to claim 1, wherein said reflector is provided with a holding mechanism for holding said lead wire.
Claim 4
Dependent Claim
27 words
A liquid crystal display device according to claim 1, wherein said reflector is provided with a member for holding said one end of said light transmitting plate.
Claim 5
Dependent Claim
29 words
A liquid crystal display device according to claim 1, wherein said slide mechanism comprises a guide rail along which said reflector is slid out from said light transmitting plate.
Claim 6
Dependent Claim
18 words
A liquid crystal display device according to claim 1, wherein said light transmitting plate is made of acrylyl.
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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) | 1997-01-17 | 1997-07-19 | 1998-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-17 | 2001-07-19 | 2002-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-17 | 2005-07-19 | 2006-01-18 | $7700.00 | Window Closed / Lapsed |