US5305154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color filter with a porous activated film layer having dyes fixed in the minute pores to form a color pattern
Assignee: Nissha Printing Co Ltd
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Filing: 1992-11-04
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Granted: 1994-04-19
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Expires: 2012-11-04
Abstract
Abstract A color filter in accordance with the present invention comprises an activated film layer (2) arranged on a transparent substrate (1), said activated film layer (2) having a color pattern formed thereon by permeating a dye thereinto, and a thin metal film pattern (3) formed on a portion, of said activated film layer (2), which requires the formation of a black mask. Accordingly, the color filter integrated into various display devices such as a liquid crystal display is capable of displaying an image having a high contrast.
Inventors
- 👤 Takao Sumi
- 👤 Tenri Isoda
- 👤 Yoshihide Inako
- 👤 Masahiro Nishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:50
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133512; G02F1/133514
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
131 words
A color filter which comprises: a transparent substrate; a transparent porous activated film layer of activated alumina or activated silica which is formed by coating alumina colloid, silica colloid or a mixture thereof on said transparent substrate and calcining the colloid at 350°-850° C., said activated film layer having a color layer formed in patterns on said transparent substrate, said patterns being formed by permeating dyes into said activated film layer; a black mask made of a thin metal film layer produced by electroless plating and anchored in the fine holes of the porous activated film layer to form a pattern on a boundary between adjacent patterns of said color layer; and an overcoating layer formed on said activated film layer and covering said activated film layer and said black mask.
Claim 2
Dependent Claim
131 words
A color filter which comprises: a transparent substrate; a transparent porous activated film layer of activated alumina or activated silica which is formed by coating alumina colloid, silica colloid or a mixture thereof on said transparent substrate and calcining the colloid at 350°-850° C., said activated film layer having a color layer formed in patterns on said transparent substrate, said patterns being formed by permeating dyes into said activated film layer; a black mask made of a thin metal film layer produced by electroless plating and anchored in the fine holes of the porous activated film layer to form a pattern on a boundary between adjacent patterns of said color layer; and an overcoating layer formed on said activated film layer and covering said activated film layer and said black mask.
Claim 3
Dependent Claim
19 words
The color filter according to claim 1, wherein the black mask has a thickness of 500 to 3,000 Å.
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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) | 1997-04-18 | 1997-10-18 | 1998-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-18 | 2001-10-18 | 2002-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-18 | 2005-10-18 | 2006-04-19 | $7700.00 | Window Closed / Lapsed |