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US5142391A
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Liquid-crystal display device of optical writing type having a light absorbing layer composed of a carbon-dispersed system coating
Assignee: Sharp Corp
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Filing: 1991-04-22
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Granted: 1992-08-25
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Expires: 2011-04-22
Abstract
Abstract A liquid-crystal display device of optical writing type includes a first transparent substrate, a first transparent electrode layer formed on the first transparent substrate, a photoconductive layer formed on the first transparent electrode layer, a light-absorbing layer composed of an organic film, the light-absorbing layer formed on the photoconductive layer, a dielectric layer formed on the light-absorbing layer, a second transparent substrate, a second transparent electrode layer formed on the second transparent substrate, and a liquid-crystal layer disposed between the second transparent electrode layer and the dielectric layer.
Inventors
- 👤 Sayuri Fujiwara
- 👤 Naofumi Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:23
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/135; G02F1/1351
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
95 words
A liquid-crystal display device of optical writing type comprising: a first transparent substrate; a first transparent electrode layer formed on said first transparent substrate; a photoconductive layer formed on said first transparent electrode layer; a light-absorbing layer composed of a carbon-dispersed system coating material including an acrylic system resin, said light-absorbing layer formed on said photoconductive layer; a dielectric layer formed on said light-absorbing layer; a second transparent substrate; a second transparent electrode layer formed on said second transparent substrate; and a liquid-crystal layer disposed between said second transparent electrode layer and said dielectric layer.
Claim 2
Dependent Claim
95 words
A liquid-crystal display device of optical writing type comprising: a first transparent substrate; a first transparent electrode layer formed on said first transparent substrate; a photoconductive layer formed on said first transparent electrode layer; a light-absorbing layer composed of a carbon-dispersed system coating material including an acrylic system resin, said light-absorbing layer formed on said photoconductive layer; a dielectric layer formed on said light-absorbing layer; a second transparent substrate; a second transparent electrode layer formed on said second transparent substrate; and a liquid-crystal layer disposed between said second transparent electrode layer and said dielectric layer.
Claim 3
Dependent Claim
24 words
A liquid-crystal display device according to claim 1, wherein said carbon-dispersed system coating material is formed to have a thickness of about 1.5 μm.
Claim 4
Dependent Claim
32 words
A liquid-crystal display device according to claim 2, wherein said carbon-dispersed system coating material has a resistivity of 10 7 Ω.cm and a permeability of about 0.3% in a visible light range.
Claim 5
Dependent Claim
19 words
A liquid-crystal display device according to claim 1, wherein said first transparent substrate is consisted of a glass plate.
Claim 6
Dependent Claim
22 words
A liquid-crystal display device according to claim 1, wherein said first transparent electrode layer is composed of an ITO transparent conductive film.
Claim 7
Dependent Claim
30 words
A liquid-crystal display device according to claim 1, wherein said photoconductive layer is composed of hydrogenated amorphous silicon (a-Si:H) and is formed to have a thickness of about 3 μm.
Claim 8
Dependent Claim
23 words
A liquid-crystal display device according to claim 1, wherein said dielectric layer is formed of silicon dioxide and titanium dioxide being laminated alternately.
Claim 9
Dependent Claim
27 words
A liquid-crystal display device according to claim 7, wherein said dielectric layer is formed to have a thickness of about 2 μm and a reflection of 99%.
Claim 10
Dependent Claim
20 words
A liquid-crystal display device according to claim 1, wherein said liquid-crystal layer is formed by nematic liquid-crystal or smectic liquid-crystal.
Claim 11
Dependent Claim
56 words
A liquid-crystal display device according to claim 9, wherein said liquid-crystal layer includes a dispersed type liquid-crystal compound film formed of a film including bifunctional acrylate, nematic liquid-crystal and polymerization initiator, said bifunctional acrylate consisting of a UV polymerizing compound, said liquid-crystal layer formed on said dielectric layer and to have a thickness of 10 μm.
Claim 12
Dependent Claim
19 words
A liquid-crystal display device according to claim 1, wherein said second transparent substrate is consisted of a glass plate.
Claim 13
Dependent Claim
22 words
A liquid-crystal display device according to claim 1, wherein said second transparent electrode layer is composed of an ITO transparent conductive film.
Claim 14
Dependent Claim
29 words
A liquid-crystal display device according to claim 1, wherein said device comprises an a.c. power source for applying an a.c. voltage between said first and second transparent electrode layers.
Claim 15
Dependent Claim
33 words
A liquid-crystal display device according to claim 1, wherein said device comprises a first orientation film formed on said dielectric layer and a second orientation film formed on said second transparent electrode layer.
Claim 16
Dependent Claim
19 words
A liquid-crystal display device according to claim 14, wherein said first orientation film is formed of a polyimide film.
Claim 17
Dependent Claim
24 words
A liquid-crystal display device according to claim 1, wherein said device comprises sealing material which forms a periphery for sealing said liquid crystal layer.
Claim 18
Dependent Claim
97 words
A liquid-crystal display device of optical writing type comprising: a first transparent substrate; a first transparent electrode layer formed on said first transparent substrate; a photoconductive layer formed on said first transparent electrode layer; a light-absorbing layer composed of a carbon-dispersed system coating material including polyimide, polyamide, or epoxy resin, said light-absorbing layer being formed on said photoconductive layer; a dielectric layer formed on said light-absorbing layer; a second transparent substrate; a second transparent electrode layer formed on said second transparent substrate; and a liquid-crystal layer disposed between said second transparent electrode layer and said dielectric layer.
Claim 19
Dependent Claim
97 words
A liquid-crystal display device of optical writing type comprising: a first transparent substrate; a first transparent electrode layer formed on said first transparent substrate; a photoconductive layer formed on said first transparent electrode layer; a light-absorbing layer composed of a carbon-dispersed system coating material including polyimide, polyamide, or epoxy resin, said light-absorbing layer being formed on said photoconductive layer; a dielectric layer formed on said light-absorbing layer; a second transparent substrate; a second transparent electrode layer formed on said second transparent substrate; and a liquid-crystal layer disposed between said second transparent electrode layer and said dielectric layer.
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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) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |