US4801933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal matrix device having separate driving circuits with diverse driving voltages
Assignee: Sharp Corp
•
Filing: 1986-03-20
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Granted: 1989-01-31
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Expires: 2006-03-20
Abstract
Abstract A multiplex-driven liquid crystal X-Y matrix display in which the electrodes are divided into several blocks and a driving voltage is independently applied to each of the blocks. Each driving voltage has a magnitude that is different from the remaining drive voltages. The display panel is free from nonuniform or deteriorated contrast even if it has a large number of scanning electrodes. Besides, for a color display, the color balance is favorably adjusted, realizing a high quality picture image.
Inventors
- 👤 Kunihiko Yamamoto
- 👤 Yutaka Ishii
- 👤 Hiroshi Take
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:21
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3607
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
A liquid crystal matrix display device, comprising: a plurality of signal electrodes arranged in a first direction, and divided into a plurality of electrode blocks; a plurality of scanning electrodes arranged in a second direction perpendicular to said first direction, intersections of said signal and scanning electrodes forming picture elements of said display; and a plurality of driver circuits for driving said signal electrodes, each driver circuit being connected to a block of signal electrodes, each of said plurality of driver circuits applying a driving voltage to a respective block, each driving voltage having a magnitude that is different from the remaining driving voltages.
Claim 2
Dependent Claim
104 words
A liquid crystal matrix display device, comprising: a plurality of signal electrodes arranged in a first direction, and divided into a plurality of electrode blocks; a plurality of scanning electrodes arranged in a second direction perpendicular to said first direction, intersections of said signal and scanning electrodes forming picture elements of said display; and a plurality of driver circuits for driving said signal electrodes, each driver circuit being connected to a block of signal electrodes, each of said plurality of driver circuits applying a driving voltage to a respective block, each driving voltage having a magnitude that is different from the remaining driving voltages.
Claim 3
Dependent Claim
22 words
The liquid crystal matrix display device defined in claim 1, wherein said electrode blocks are formed of groups of adjacent signal electrodes.
Claim 4
Dependent Claim
39 words
The liquid crystal matrix display device defined in claim 1, wherein said signal electrodes comprise a plurality of electrodes of different colors, each said electrode block being formed of a group of signal electrodes of one of said colors.
Claim 5
Dependent Claim
18 words
The liquid crystal matrix display device defined in claim 3, wherein said colors are red, green and blue.
Claim 6
Dependent Claim
67 words
The liquid crystal matrix display device defined in claim 1, wherein said scanning electrodes are divided into a plurality of scanning electrode blocks, said device further comprising: a plurality of scanning driver circuits for driving said scanning electrode blocks, each scanning driver circuit applying a scanning voltage to a respective scanning electrode block, each scanning voltage having a magnitude that is different from the remaining scanning voltages.
Claim 7
Dependent Claim
104 words
A liquid crystal matrix display device, comprising: a plurality of scanning electrodes arranged in a first direction, and divided into a plurality of electrode blocks; a plurality of signal electrodes arranged in a second direction perpendicular to said first direction, intersections of said scanning and signal electrodes forming picture elements of said display; and a plurality of driver circuits for driving said scanning electrodes, each driver circuit being connected to a block of scanning electrodes, each of said plurality of driver circuits applying a driving voltage to a respective block, each driving voltage having a magnitude that is different from the remaining driving voltages.
Claim 8
Dependent Claim
104 words
A liquid crystal matrix display device, comprising: a plurality of scanning electrodes arranged in a first direction, and divided into a plurality of electrode blocks; a plurality of signal electrodes arranged in a second direction perpendicular to said first direction, intersections of said scanning and signal electrodes forming picture elements of said display; and a plurality of driver circuits for driving said scanning electrodes, each driver circuit being connected to a block of scanning electrodes, each of said plurality of driver circuits applying a driving voltage to a respective block, each driving voltage having a magnitude that is different from the remaining driving voltages.
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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) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |