US5446570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display with projecting portions on the electrodes
Assignee: Canon Inc
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Filing: 1994-04-21
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Granted: 1995-08-29
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Expires: 2014-04-21
Abstract
Abstract The present invention provides a liquid crystal device having excellent gradation characteristics. A liquid crystal device of the invention has a liquid crystal held between a pair of electrodes. At least one of the electrodes is provided with a plurality of stripe electrodes with different spaces therebetween, and films provided between the respective stripe electrodes and having a sheet resistance of 10 4 Ω/□ to 10 8 Ω/□. Alternatively, at least one of the electrodes has a plurality of projecting stripe portions formed thereon with different spaces within each of the pixels formed by intersections of both electrodes, the spaces between the projecting portions changes with a gradient within a pixel, and means for forming a distribution gradient of the strength of the electric field applied to the liquid crystal along the gradient of the space change. Thus, the controllability of the occurrence position of a reverse region and extension thereof is improved, and the applied voltage-transmittance characteristic with good linearity are obtained.
Inventors
- 👤 Shuzo Kaneko
- 👤 Shinjiro Okada
- 👤 Satoshi Yuasa
- 👤 Katsuhiko Shinjo
- 👤 Hirokatsu Miyata
- 👤 Masaaki Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:36
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134336; G02F2203/00; G02F2203/30
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
60 words
A liquid crystal device comprising a liquid crystal disposed between a pair of electrodes, wherein at least one of said electrodes has a plurality of stripe electrodes formed with continuity and different spaces therebetween within each of the pixels, and films provided at least in said spaces and having a sheet resistance of 10 4 Ω/□ to 10 8 Ω/□.
Claim 2
Dependent Claim
60 words
A liquid crystal device comprising a liquid crystal disposed between a pair of electrodes, wherein at least one of said electrodes has a plurality of stripe electrodes formed with continuity and different spaces therebetween within each of the pixels, and films provided at least in said spaces and having a sheet resistance of 10 4 Ω/□ to 10 8 Ω/□.
Claim 3
Dependent Claim
18 words
A liquid crystal device according to claim 1, wherein said spaces change with a gradient over one pixel.
Claim 4
Dependent Claim
32 words
A liquid crystal device according to claim 1, wherein each of said stripe electrodes comprises a projecting portion having a height of 5% to 15% of the thickness of the cell used.
Claim 5
Dependent Claim
72 words
A liquid crystal device comprising a liquid crystal held between a pair of electrodes, wherein at least one of said electrodes has a plurality of projecting portions formed within different spaces therebetween within each of the pixels, said spaces changing with a gradient within one pixel; and means for forming a distribution gradient of the strength of the electric field applied to said liquid crystal along the gradient of the space change.
Claim 6
Dependent Claim
72 words
A liquid crystal device comprising a liquid crystal held between a pair of electrodes, wherein at least one of said electrodes has a plurality of projecting portions formed within different spaces therebetween within each of the pixels, said spaces changing with a gradient within one pixel; and means for forming a distribution gradient of the strength of the electric field applied to said liquid crystal along the gradient of the space change.
Claim 7
Dependent Claim
25 words
A liquid crystal device according to claim 4, wherein said projecting stripe portions have a height of 5 to 15% of the cell thickness used.
Claim 8
Dependent Claim
72 words
A liquid crystal device comprising a liquid crystal held between a pair of electrodes, wherein at least one of said electrodes has first low-resistance stripe electrodes to which electricity is supplied, and a plurality of second stripe electrodes formed with different spaces therebetween within each of the pixels, and a film having a sheet resistance of 10 4 Ω/□ to 10 8 Ω/□ is provided between the first and second stripe electrodes.
Claim 9
Dependent Claim
72 words
A liquid crystal device comprising a liquid crystal held between a pair of electrodes, wherein at least one of said electrodes has first low-resistance stripe electrodes to which electricity is supplied, and a plurality of second stripe electrodes formed with different spaces therebetween within each of the pixels, and a film having a sheet resistance of 10 4 Ω/□ to 10 8 Ω/□ is provided between the first and second stripe electrodes.
Claim 10
Dependent Claim
18 words
A liquid crystal device according to claim 6, wherein said spaces change with a gradient over one pixel.
Claim 11
Dependent Claim
30 words
A liquid crystal device according to claim 6, wherein each of said stripe electrodes comprises a projecting portion at a height of 5 to 15% of the cell thickness used.
Claim 12
Dependent Claim
72 words
A liquid crystal device comprising a liquid crystal held between a pair of electrodes, wherein at least one of said electrodes has a plurality of projecting stripe portions formed thereon with different spaces therebetween within each of the pixels, the spaces between the respective projecting portions changing with a gradient within a pixel; and the electrode distance between said electrodes is provided with a gradient along the gradient of the space change.
Claim 13
Dependent Claim
72 words
A liquid crystal device comprising a liquid crystal held between a pair of electrodes, wherein at least one of said electrodes has a plurality of projecting stripe portions formed thereon with different spaces therebetween within each of the pixels, the spaces between the respective projecting portions changing with a gradient within a pixel; and the electrode distance between said electrodes is provided with a gradient along the gradient of the space change.
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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) | 1998-08-28 | 1999-02-27 | 1999-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-28 | 2003-02-27 | 2003-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-28 | 2007-02-27 | 2007-08-29 | $7700.00 | Window Closed / Lapsed |