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Patent US4881797A successfully refreshed from Google Patents.
US4881797A
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Color liquid crystal display device
Assignee: TPO Hong Kong Holding Ltd
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Filing: 1988-08-16
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Granted: 1989-11-21
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Expires: 2008-08-16
Abstract
Abstract A color liquid crystal display device comprises first and second transparent substrates, and a liquid crystal sealed therebetween. A plurality of display electrodes and thin film transistors each connected to each of the display electrodes are formed on the first transparent substrate. Color filters are formed on the second transparent substrate such that they each face each of the display electrodes. A common electrode is also formed over the entire surface of the second transparent electrode. The gap between adjacent color filters is closed by a metal layer capable of blocking light. These light-blocking layers overlie the common electrode in contact therewith.
Inventors
- 👤 Shigeo Aoki
- 👤 Katsumi Miyake
- 👤 Yasuhiro Ugai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:43
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133512; G02F1/133514; G02F1/136; G02F1/1362; G02F1/1368
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
185 words
A color liquid crystal display device comprising first and second transparent substrates spaced apart a small distance and facing each other, a liquid crystal sealed between said two transparent substrates, a plurality of transparent display electodes provided on the inner side surface of said first transparent substrate, thin film transistors formed on said first transparent substrate and each connected to each of said display electrodes, a transparent common electrode formed substantially on the entire inner side surface of said second transparent substrate, and color filters each facing each of said display electrodes, the improvement wherein: said color filters are separated from one another by a gap which is defined between the opposing side edges of adjacent ones of said color filters, each gap between adjacent ones of said color filters being closed by a metal layer capable of blocking light, said light-blocking layers being formed on said second substrate and having marginal edges underlying the marginal edges of said color filters, and said common electrode extending over and in contact with said color filters and with portions of said light-blocking layers between said color filters.
Claim 2
Dependent Claim
185 words
A color liquid crystal display device comprising first and second transparent substrates spaced apart a small distance and facing each other, a liquid crystal sealed between said two transparent substrates, a plurality of transparent display electodes provided on the inner side surface of said first transparent substrate, thin film transistors formed on said first transparent substrate and each connected to each of said display electrodes, a transparent common electrode formed substantially on the entire inner side surface of said second transparent substrate, and color filters each facing each of said display electrodes, the improvement wherein: said color filters are separated from one another by a gap which is defined between the opposing side edges of adjacent ones of said color filters, each gap between adjacent ones of said color filters being closed by a metal layer capable of blocking light, said light-blocking layers being formed on said second substrate and having marginal edges underlying the marginal edges of said color filters, and said common electrode extending over and in contact with said color filters and with portions of said light-blocking layers between said color filters.
Claim 3
Dependent Claim
32 words
The color liquid crystal display device according to claim 1, wherein said common electrode is formed on the side of said color filters and light-blocking layers opposite to said second transparent substrate.
Claim 4
Dependent Claim
93 words
The color liquid crystal display device according to one of claims 1 or 2, wherein said display electrodes are picture element electrodes and are arranged in a matrix array, the source electrodes of the thin film transistors in each column of said matrix array are connected to a common source bus, the gate electrodes of the thin film transistors in each row of said matrix array are connected to a common gate bus, and said color filters exhibit a plurality of different colors, with color filters of like color being distributed substantially uniformly.
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) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |