US5530573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple domain liquid crystal display having a cell thickness divided by helical pitch equal to 1/8 or less
Assignee: Sharp Corp
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Filing: 1994-05-23
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Granted: 1996-06-25
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Expires: 2014-05-23
Abstract
Abstract A liquid crystal display device which includes two substrates opposed to each other; electrodes respectively provided on surfaces of the two substrates, the surfaces opposing to each other; heat-resistant polymer films each having a generally smooth surface and respectively provided on the electrodes; a liquid crystal layer interposed between the heat-resistant polymer films and including a plurality of microscopic regions; and two polarizing plates interposing the two substrates. Each of the plurality of the microscopic regions in the vicinity of the heat-resistant polymer films has liquid crystal molecules aligned uniformly, and the liquid crystal molecules in different microscopic regions are arranged in different directions with respect to one another.
Inventors
- 👤 Shinji Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:20
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133753; G02F1/1334; G02F1/133765
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
137 words
A liquid crystal display device comprising: two substrates opposed to each other; electrodes respectively provided on surfaces of the two substrates, the surfaces opposing to each other; heat-resistant polymer films such having a generally smooth surface and respectively provided on the electrodes; a liquid crystal layer interposed between the heat-resistant polymer films and including a plurality of microscopic regions; and two polarizing plates interposing the two substrates, wherein each of the plurality of the microscopic regions in the vicinity of the heat-resistant polymer films has liquid crystal molecules aligned uniformly, and the liquid crystal molecules in different microscopic regions are arranged in different directions with respect to one another, and wherein d/p is 1/8 or less where d is a thickness of a liquid crystal layer and P is a helical pitch of the liquid crystal molecules.
Claim 2
Dependent Claim
137 words
A liquid crystal display device comprising: two substrates opposed to each other; electrodes respectively provided on surfaces of the two substrates, the surfaces opposing to each other; heat-resistant polymer films such having a generally smooth surface and respectively provided on the electrodes; a liquid crystal layer interposed between the heat-resistant polymer films and including a plurality of microscopic regions; and two polarizing plates interposing the two substrates, wherein each of the plurality of the microscopic regions in the vicinity of the heat-resistant polymer films has liquid crystal molecules aligned uniformly, and the liquid crystal molecules in different microscopic regions are arranged in different directions with respect to one another, and wherein d/p is 1/8 or less where d is a thickness of a liquid crystal layer and P is a helical pitch of the liquid crystal molecules.
Claim 3
Dependent Claim
21 words
A liquid crystal display device according to claim 1, wherein the polarizing plates respectively have polarizing axes perpendicular to each other.
Claim 4
Dependent Claim
24 words
A liquid crystal display device according to claim 1, wherein the microscopic regions each have an average diameter of 1 μm to 200 μm.
Claim 5
Dependent Claim
47 words
A liquid crystal display device according to claim 1, wherein the liquid crystal layer has a retardation between an ordinary ray and an extraordinary ray in a range of 0.29 μm to 0.75 μm when light is incident on the liquid crystal layer in the normal direction.
Claim 6
Dependent Claim
18 words
A liquid crystal display device according to claim 1, wherein the liquid crystal layer includes a chiral dopant.
Claim 7
Dependent Claim
47 words
A liquid crystal display device according to claim 1, wherein the heat-resistant polymer films each include one of polyimide, polyamic acid and partially imidized polyamic acid with the proviso that the polyimide, polyamic acid and partially imidized polyamic acid do not contain a long chain alkyl group.
Claim 8
Dependent Claim
24 words
A liquid crystal display device according to claim 1, wherein at least one of the two substrates includes an array of nonlinear electrical devices.
Claim 9
Dependent Claim
22 words
A liquid crystal display device according to claim 1, wherein a light reflecting layer is provided on one of the two substrates.
Claim 10
Dependent Claim
18 words
A liquid crystal display device according to claim 1, further comprising a wall in the liquid crystal layer.
Claim 11
Dependent Claim
24 words
A liquid crystal display device according to claim 9, wherein the wall includes at least one of a photo-curable resin and a photo-polymerizable polymer.
Claim 12
Dependent Claim
43 words
A liquid crystal display device according to claim 1, further comprising a thin film transistor, provided on one of the substrates, for supplying a voltage to electrodes on the one of the substrates to apply an electric field to the liquid crystal layer.
Claim 13
Dependent Claim
42 words
A liquid crystal display device according to claim 1, further comprising a metal-insulator-metal device, provided on one of the substrates, for supplying a voltage to electrodes on the one of the substrates to apply an electric field to the liquid crystal layer.
Claim 14
Dependent Claim
31 words
A projection type liquid crystal display system, comprising: a liquid crystal display device according to claim 1; and projection means cooperative with the liquid crystal display device to project an image.
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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) | 1999-06-25 | 1999-12-25 | 2000-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-25 | 2003-12-25 | 2004-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-25 | 2007-12-25 | 2008-06-25 | $7700.00 | Window Closed / Lapsed |