US4714636A
Expired / Lapsed
US
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Liquid crystal device for color display
Assignee: Canon Inc
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Filing: 1985-04-12
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Granted: 1987-12-22
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Expires: 2005-04-12
Abstract
Abstract A color filter with a good heat resistance is provided on a base plate for a liquid crystal device by vapor deposition of a colorant. Transparent electrodes are formed on the color filter and the thus formed base plate is combined with the other base plate having thereon a TFT circuit for driving a liquid crystal interposed between the base plates. Thus a liquid crystal color display device having a structure suited for driving is provided.
Inventors
- 👤 Koujiro Yokono
- 👤 Masaru Kamio
- 👤 Yukitoshi Ohkubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:37
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; C; C09; C09K; C09K2323/00; C09K2323/03; C09K2323/031
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
A liquid crystal device for color display, comprising: a pair of oppositely spaced base plates having facing surfaces; a liquid crystal disposed between the facing surfaces of the base plates so as to form a plurality of picture elements; a plurality of color filters formed on the facing surface of one of the base plates so as to provide each picture element with a color filter; each individual color filter having a blue, green or red color; and a transparent electrode formed on the plurality of color filters; each of said color filters comprising a vapor-deposited colorant layer of an organic pigment; said colorant layer having a thickness of about 1,000 angstroms to 1 micron.
Claim 2
Dependent Claim
115 words
A liquid crystal device for color display, comprising: a pair of oppositely spaced base plates having facing surfaces; a liquid crystal disposed between the facing surfaces of the base plates so as to form a plurality of picture elements; a plurality of color filters formed on the facing surface of one of the base plates so as to provide each picture element with a color filter; each individual color filter having a blue, green or red color; and a transparent electrode formed on the plurality of color filters; each of said color filters comprising a vapor-deposited colorant layer of an organic pigment; said colorant layer having a thickness of about 1,000 angstroms to 1 micron.
Claim 3
Dependent Claim
28 words
The liquid crystal device according to claim 1, wherein said transparent electrode comprises a film of indium tin oxide formed through vapor deposition by the electron beam process.
Claim 4
Dependent Claim
27 words
The liquid crystal device according to claim 1, wherein said transparent electrode comprises a film of indium tin oxide formed through vapor deposition by the sputtering process.
Claim 5
Dependent Claim
38 words
The liquid crystal device according to claim 1, wherein said layer of colorant is formed of a film of a colorant selected from the group consisting of phthalocyanine compounds, perylene compounds, isoindolinone compounds, anthraquinone compounds and quinacridone compounds.
Claim 6
Dependent Claim
36 words
The liquid crystal device according to claim 1, wherein said at least one of the oppositely spaced base plates has an orientation controlling layer of an insulating material covering the color filter and the transparent electrode.
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) | 1990-12-21 | 1991-06-22 | 1991-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-21 | 1995-06-22 | 1995-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-21 | 1999-06-22 | 1999-12-22 | $7700.00 | Window Closed / Lapsed |