US5087114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal device wherein the most optimum ratio of spacing between substrates in which the liquid crystal is disposed and before disposing of the liquid crystal is 0.77-0.87
Assignee: Semiconductor Energy Laboratory Co Ltd
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Filing: 1989-12-11
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Granted: 1992-02-11
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Expires: 2009-12-11
Abstract
Abstract An improved liquid crystal device is described. The distance between a pair of substrates is kept constant by means of spacers interposed therebetween. The material, the size and the distribution density of the spacers are chosen in order that the distance between the mated substrates just before the liquid crystal is disposed in the formation of the liquid crystal device is 0.77-0.87 of that after the disposing.
Inventors
- 👤 Takeshi Fukui
- 👤 Toshio Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:16
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13392
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
102 words
A liquid crystal device comprising: a pair of substrates; an electrode arrangement formed on the inside surfaces of the pair of substrates; a ferroelectric liquid crystal layer disposed between said substrates; a plurality of spacers distributed between said substrates in order to more uniformly maintain the distance between said substrates, said spacers comprising non-fusible spacers and fusible resilient spacers; wherein the distribution density of said fusible resilient spacers is selected from 2 to 200 particles per square millimeter such that the distance between the mated substrates before the liquid crystal is disposed is 0.77-0.87 of that after the liquid crystal is disposed.
Claim 2
Dependent Claim
102 words
A liquid crystal device comprising: a pair of substrates; an electrode arrangement formed on the inside surfaces of the pair of substrates; a ferroelectric liquid crystal layer disposed between said substrates; a plurality of spacers distributed between said substrates in order to more uniformly maintain the distance between said substrates, said spacers comprising non-fusible spacers and fusible resilient spacers; wherein the distribution density of said fusible resilient spacers is selected from 2 to 200 particles per square millimeter such that the distance between the mated substrates before the liquid crystal is disposed is 0.77-0.87 of that after the liquid crystal is disposed.
Claim 3
Dependent Claim
15 words
The liquid crystal device of claim 1 wherein said non-fusible spacers are made of polystyrene.
Claim 4
Dependent Claim
17 words
The liquid crystal device of claim 1 wherein said non-fusible spacers are made of SiO 2 .
Claim 5
Dependent Claim
18 words
The liquid crystal device of claim 1 wherein said fusible resilient spacers are made of an epoxy resin.
Claim 6
Dependent Claim
17 words
The liquid crystal device of claim 4 wherein a diameter of said epoxy spacers is 2.9-8.2 μm.
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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) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |