US4723839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal light valve
Assignee: Alps Alpine Co Ltd
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Filing: 1985-11-15
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Granted: 1988-02-09
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Expires: 2005-11-15
Abstract
Abstract A liquid crystal light valve has two base plates of glass and transparent electrodes formed thereon with a ferroelectric liquid crystal interposed between the electrodes, wherein one of the electrodes has a film of insulative material oriented in a specific direction through rubbing treatment, and the other electrode has a film of insulative material treated with a coupler material for horizontal orientation but not oriented in a specific direction.
Inventors
- 👤 Jun Nakanowatari
- 👤 Mitsuru Kano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:32
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; C; C09; C09K; C09K19/00; C09K19/02; C09K19/0225; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
88 words
A liquid crystal light valve comprising: two transparent, spaced apart base plates of glass having respective transparent electrode layers formed on their inner surfaces facing opposite each other; a ferroelectric liquid crystal interposed between said electrodes of said base plates; and one of said electrodes having a film of insulative material formed thereon oriented in a specific direction through rubbing treatment, and the other of said electrodes having a film of insulative material treated with a coupler material for horizontal orientation but not oriented in a specific direction.
Claim 2
Dependent Claim
88 words
A liquid crystal light valve comprising: two transparent, spaced apart base plates of glass having respective transparent electrode layers formed on their inner surfaces facing opposite each other; a ferroelectric liquid crystal interposed between said electrodes of said base plates; and one of said electrodes having a film of insulative material formed thereon oriented in a specific direction through rubbing treatment, and the other of said electrodes having a film of insulative material treated with a coupler material for horizontal orientation but not oriented in a specific direction.
Claim 3
Dependent Claim
31 words
A liquid crystal light valve according to claim 1, wherein said ferroelectric liquid crystal is composed of three components, that is, p-(act-amyloxy)-phenyl p-n-hexyloxy benzoate, (s)-p-2-methylbutoxy-phenyl p-n-octyloxy benzoate, and (s)-p-2-methylbutoxy-phenyl p-n-octyloxy benzoate.
References Cited (Backward Citations)
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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) | 1991-02-08 | 1991-08-10 | 1992-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-08 | 1995-08-10 | 1996-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-08 | 1999-08-10 | 2000-02-09 | $7700.00 | Window Closed / Lapsed |