Patent US5229873A successfully refreshed from Google Patents.
US5229873A
Expired / Lapsed
US
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Liquid crystal display having apertures in both electrodes
Assignee: Stanley Electric Co Ltd
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Filing: 1991-10-29
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Granted: 1993-07-20
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Expires: 2011-10-29
Abstract
Abstract Disclosed is a liquid crystal display comprising a liquid crystal layer, a pair of substrates holding the liquid crystal layer therebetween and having two sets of crossed electrodes formed thereon, a pair of crossed polarizers provided outside the substrates and having polarization axes parallel to the electrodes respectively, and an orientation means for making the liquid crystal molecules orient to the intermediate direction of the crossed polarizers at the commencement of voltage application. The orientation means is selected form pretilt, fringe electric field, combinations thereof, etc. In the beginning of voltage application, no leakage light is generated even if the liquid crystal molecules are tilted by a fringe electric field in the vicinity of the edges of the electrodes.
Inventors
- 👤 Shinichi Hirose
- 👤 Jean F. Clerc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:35
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/139; G02F1/1393; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134336
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
143 words
A liquid crystal display comprising: a pair of substrates disposed to face each other; two sets of electrodes provided on said pair of substrates respectively so as to substantially orthogonally intersect each other; a pair of crossed polarizers having respectively polarization axes which are disposed in the same directions as the directions of extension of said two sets of substantially orthogonal electrodes; liquid crystal molecules sandwiched between said two sets of electrodes; a liquid crystal molecule orientation means for tilting said liquid crystal molecules to an intermediate direction of said polarization axes of said crossed polarizers in a main area of the intersect between said electrodes facing each other, said orientation means including an opening so formed in each electrode of both of said two sets of electrodes that said opening is elongated in the direction perpendicular to edges of said each electrode.
Claim 2
Dependent Claim
143 words
A liquid crystal display comprising: a pair of substrates disposed to face each other; two sets of electrodes provided on said pair of substrates respectively so as to substantially orthogonally intersect each other; a pair of crossed polarizers having respectively polarization axes which are disposed in the same directions as the directions of extension of said two sets of substantially orthogonal electrodes; liquid crystal molecules sandwiched between said two sets of electrodes; a liquid crystal molecule orientation means for tilting said liquid crystal molecules to an intermediate direction of said polarization axes of said crossed polarizers in a main area of the intersect between said electrodes facing each other, said orientation means including an opening so formed in each electrode of both of said two sets of electrodes that said opening is elongated in the direction perpendicular to edges of said each electrode.
Claim 3
Dependent Claim
91 words
A liquid crystal display according to claim 1, wherein said liquid crystal molecule orientation means is constituted by an orientation structure for making said liquid crystal molecules pretilt on the surfaces of said electrodes and said two sets of electrodes which have such dimensions that the combination of a fringe electric field between said two sets of electrodes and an influence of the pretilt makes said liquid crystal molecules tilt toward said intermediate direction in a main area of the intersect between said electrodes when voltage application between said electrodes begins.
Claim 4
Dependent Claim
44 words
A liquid crystal display according to claim 2, wherein one of said two sets of electrodes is composed of thin electrodes and the other set is composed of electrodes thicker than said thin electrodes, and wherein said pretilt is given along said thin electrodes.
Claim 5
Dependent Claim
26 words
A liquid crystal display according to claim 1 wherein said liquid crystal molecules are homeotropically oriented in the absence of an applied voltage across said electrodes.
Claim 6
Dependent Claim
13 words
A liquid crystal display according to claim 1 wherein said electrodes are transparent.
Claim 7
Dependent Claim
17 words
A liquid crystal display according to claim 1 wherein said two sets of electrodes have different widths.
Claim 8
Dependent Claim
30 words
A liquid crystal display according to claim 1 wherein said liquid crystal molecules are homeotropically oriented in the absence of an applied voltage across the electrodes, said electrodes being transparent.
Claim 9
Dependent Claim
17 words
A liquid crystal display according to claim 7 wherein said two sets of electrodes have different widths.
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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) | 1996-07-19 | 1997-01-18 | 1997-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-19 | 2001-01-18 | 2001-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-19 | 2005-01-18 | 2005-07-20 | $7700.00 | Window Closed / Lapsed |