US4973138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal device and manufacturing method for the same
Assignee: Semiconductor Energy Laboratory Co Ltd
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Filing: 1988-10-21
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Granted: 1990-11-27
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Expires: 2008-10-21
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 spacers consist of two kinds of spacers. One kind of spacer is fusible and functions to prevent the distance from expanding. The other kind of spacer is non-fusible and functions to prevent the distance from contracting.
Inventors
- 👤 Shunnei Yamazaki
- 👤 Toshio Watanabe
- 👤 Hidetaka Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:54
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13392
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A liquid crystal device comprising: a pair of substrates; an electrode arrangment formed on the inside surfaces of the pair of substrates; a liquid crystal layer disposed between said substrates; and a plurality of spacers distributed between said substrates in order to maintain the distance between said substrates constant, wherein said spacer consist of two kinds of spacers, one being fusible and other being non-fusible; and wherein the distribution density of the fusible spacers is 100 to 150 mm -2 and that of the non-fusible spacers is 10 to 15 mm -2 .
Claim 2
Dependent Claim
93 words
A liquid crystal device comprising: a pair of substrates; an electrode arrangment formed on the inside surfaces of the pair of substrates; a liquid crystal layer disposed between said substrates; and a plurality of spacers distributed between said substrates in order to maintain the distance between said substrates constant, wherein said spacer consist of two kinds of spacers, one being fusible and other being non-fusible; and wherein the distribution density of the fusible spacers is 100 to 150 mm -2 and that of the non-fusible spacers is 10 to 15 mm -2 .
References Cited (Backward Citations)
EP0050357A1
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US4362771A
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JPS57210323A
Cited
US4600273A
Cited
JPS6098420A
Cited
EP0216632A2
Cited
EP0219242A2
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US4740060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-26 | 1994-05-28 | 1994-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-26 | 1998-05-28 | 1998-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-26 | 2002-05-28 | 2002-11-27 | $7700.00 | Window Closed / Lapsed |