US5251071A
Expired / Lapsed
US
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Color filter
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1991-10-18
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Granted: 1993-10-05
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Expires: 2011-10-18
Abstract
Abstract The color filter according to the present invention contains black matrix formed by polyimide, which contains light shielding pigments such as carbon black, triiron tetraoxide, etc. instead of the black matrix used in the past, which is formed by metal thin film such as chromium on glass substrate. Epoxy type silane coupling agent is mixed with polyimide precursor composition, and this is coated on a glass substrate and then imidized. Thus, the color filter is provided with black matrix having high bonding strength with glass substrate.
Inventors
- 👤 Hiroyuki Kusukawa
- 👤 Yasuhide Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:42
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/136209; G02F1/1333; G02F1/1335; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0751; G02F1/133509; G02F1/133514; G02F1/133516
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
47 words
A color filter provided with a colored layer comprising resin and a black matrix to define the colored layer formed on a transparent matrix, characterized in that the black matrix is obtained by imidizing a plyimide precursor composition mixed with a silane coupling agent of epoxy type.
Claim 2
Dependent Claim
47 words
A color filter provided with a colored layer comprising resin and a black matrix to define the colored layer formed on a transparent matrix, characterized in that the black matrix is obtained by imidizing a plyimide precursor composition mixed with a silane coupling agent of epoxy type.
Claim 3
Dependent Claim
21 words
A color filter according to claim 1, wherein the epoxy type silane coupling agent is selected from γ-glycidoxypropyltrimethoxysilane, γ-glycidoxylpropylmethyldiethoxysilane, and β-(3,4-epoxycyclohexyl)-ethyltrimethoxysilane.
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) | 1996-10-04 | 1997-04-05 | 1997-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-04 | 2001-04-05 | 2001-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-04 | 2005-04-05 | 2005-10-05 | $7700.00 | Window Closed / Lapsed |