US5216414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color liquid crystal display device
Assignee: Sharp Corp
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Filing: 1990-11-15
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Granted: 1993-06-01
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Expires: 2010-11-15
Abstract
Abstract A color liquid crystal display device in which a color filter is provided over the entire surface of the glass substrate. In a first embodiment, display electrodes extend over a plurality of color filter sectors to form segment electrodes. In a second embodiment, the transmissivity of light passing through the liquid crystal layer can be varied in levels by making the display electrodes in two-layer, operating voltage on each of the electrodes independently, and varying in levels the amplitude of voltage applied on the liquid crystal layer by the display electrodes. In a third embodiment, the amount of light transmitted in the display area of a color filter sector is controlled by two or more display electrodes which divide up the display area.
Inventors
- 👤 Hiroshi Fukutani
- 👤 Kunihiko Ito
- 👤 Mitsuaki Shioji
- 👤 Kazuhiko Akimoto
- 👤 Yasuhiro Inamasu
- 👤 Toshihiro Matsumoto
- 👤 Hiroshi Takanashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:44
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3607; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/1347; G02F1/13471; G02F1/137; G02F1/139; G02F1/1396
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
174 words
A color liquid crystal display device comprising: a pair of light-transmission substrates with a liquid crystal layer between them; a plurality of color selection members disposed over nearly an entire surface of one of said light-transmissive substrate facing the liquid crystal layer, such color selection members selecting one color for transmitting light from among a plurality of predetermined colors; first display electrodes transmissive to light disposed on the side of the one of said light-transmissive substrates toward the liquid crystal layer and corresponding to each of the plurality of color selection members in a predetermined display area; and second display electrodes transmissive to light disposed between the one of said light-transmissive substrates and the liquid crystal layer and superposed on said first display electrodes within the predetermined display area so as to form two layer electrodes; wherein the amplitude of voltages applied to the liquid crystal layer by the first and second display electrodes is varied by applying voltages on each of the first and second display electrodes in a two layer electrode independently.
Claim 2
Dependent Claim
174 words
A color liquid crystal display device comprising: a pair of light-transmission substrates with a liquid crystal layer between them; a plurality of color selection members disposed over nearly an entire surface of one of said light-transmissive substrate facing the liquid crystal layer, such color selection members selecting one color for transmitting light from among a plurality of predetermined colors; first display electrodes transmissive to light disposed on the side of the one of said light-transmissive substrates toward the liquid crystal layer and corresponding to each of the plurality of color selection members in a predetermined display area; and second display electrodes transmissive to light disposed between the one of said light-transmissive substrates and the liquid crystal layer and superposed on said first display electrodes within the predetermined display area so as to form two layer electrodes; wherein the amplitude of voltages applied to the liquid crystal layer by the first and second display electrodes is varied by applying voltages on each of the first and second display electrodes in a two layer electrode independently.
Claim 3
Dependent Claim
41 words
The color liquid crystal display device in claim 1 wherein the color selection members are square shaped and arranged in a mosaic and the display electrodes corresponding to the color selection members which select the same color are connected in sequence.
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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) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |