Patent US4281324A successfully refreshed from Google Patents.
US4281324A
Expired / Lapsed
US
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Matrix type liquid crystal display
Assignee: Sharp Corp
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Filing: 1978-10-27
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Granted: 1981-07-28
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Expires: 1998-10-27
Abstract
Abstract In a method for driving row electrodes (or column electrodes) of a matrix type liquid crystal display panel having a predetermined number of the row electrodes and a predetermined number of the column electrodes, different drive voltages are supplied to the row electrodes or the column electrodes so as to assure, the highest contrast despite different viewing or displaying positions.
Inventors
- 👤 Keisaku Nonomura
- 👤 Toshiaki Takamatsu
- 👤 Hisashi Uede
- 👤 Tomio Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:22
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/13306; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3644; G02F1/1333; G02F1/133391; G09G2320/00; G09G2320/02; G09G2320/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A matrix type liquid crystal display panel system comprising: a matrix type liquid crystal display panel having matrix electrodes, said liquid crystal display panel having at least a first panel portion and a second panel portion; and driving means for line scanning said matrix type liquid crystal display panel, said driving means supplying said first panel portion and said second panel portion with different drive voltages, the drive voltage applied to said first panel portion being selected to develop substantially the highest contrast as perceived by a viewer viewing said display panel with a viewing angle toward a middle point in the first panel portion, the drive voltage applied to the second panel portion being selected to develop substantially the highest contrast as perceived by a viewer viewing said display panel with a viewing angle toward a middle point in said second panel portion different from the viewing angle toward said first panel portion.
Claim 2
Dependent Claim
154 words
A matrix type liquid crystal display panel system comprising: a matrix type liquid crystal display panel having matrix electrodes, said liquid crystal display panel having at least a first panel portion and a second panel portion; and driving means for line scanning said matrix type liquid crystal display panel, said driving means supplying said first panel portion and said second panel portion with different drive voltages, the drive voltage applied to said first panel portion being selected to develop substantially the highest contrast as perceived by a viewer viewing said display panel with a viewing angle toward a middle point in the first panel portion, the drive voltage applied to the second panel portion being selected to develop substantially the highest contrast as perceived by a viewer viewing said display panel with a viewing angle toward a middle point in said second panel portion different from the viewing angle toward said first panel portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |