EP0303852A1
Expired / Lapsed
EP
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Color liquid crystal display and method for manufacturing it
Assignee: Toshiba Corp
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Filing: 1988-07-22
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Granted: —
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Expires: 2008-07-22
Abstract
Abstract A color liquid crystal display having chromatic pixels and achromatic pixels, comprises: color filters (12, 14, 16) formed at locations corresponding to said chromatic pixels (13, 15, 17) and having a light transmitting area for predetermined wavelength; and translucent filters (18) formed at locations corresponding to said achromatic pixels (19) and near an outer periphery of locations corresponding to said chromatic pixels so as to be overlapped with said color filters.
Inventors
- 👤 Haruhiro Matino
- 👤 Toshihiro Ueki
- 👤 Yasuhisa Oana
- 👤 Motoji Kajimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:50
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
(1) A color liquid crystal display which has chromatic pixels and achromatic pixels comprising: color filters formed at locations corresponding to said chromatic pixels and having a light transmitting area for predetermined wavelength; and translucent filters formed at locations corresponding to said achromatic pixels and near an outer periphery of locations corresponding to said chromatic pixels so as to be overlapped with said color filters.
Claim 2
Dependent Claim
24 words
(2) A color liquid crystal display as set forth in claim 1 wherein the optical density of said translucent filter is 0.3 to 1.5.
Claim 3
Dependent Claim
37 words
(3) A color liquid crystal display as set forth in claim 1 or 2 wherein said color filters are sets of three color filters each of which has light transmitting areas of red, green and blue respectively.
Claim 4
Dependent Claim
32 words
(4) A color liquid crystal display as set forth in any one of claims 1 to 3 wherein a thickness of said translucent filter is thinner than that of said color filter.
Claim 5
Dependent Claim
48 words
(5) A color liquid crystal display as set forth in any one of claims 1 to 4 wherein transparent material is formed on said translucent filters at least at locations corresponding to said achromatic pixels to make their thickness substantially the same as that of the color filters.
Claim 6
Dependent Claim
47 words
(6) A color liquid crystal display as set forth in claim 5 wherein a thickness of said translucent filters containing thickness of said transparent material, and a thickness of the color filters, are 0.5 to 2.0 µm and the maximum difference between these thicknesses is 0.5 µm.
Claim 7
Dependent Claim
93 words
(7) A method for manufacturing a color liquid crystal display comprising the steps of: forming material constituting translucent filters on a substrate; removing said material constituting said translucent filters at locations corresponding to pixels on which color filters are to be formed from said substrate; and forming material constituting said color filters at color filter locations corresponding to pixels on which said color filters are to be formed on said substrate and at locations which are near said color filter locations so as to be overlapped with said material constituting said translucent filters.
Claim 8
Dependent Claim
25 words
(8) A method for manufacturing a color liquid crystal display as set forth in claim 7 wherein said material constituting said translucent filters is chromium.
References Cited (Backward Citations)
US4470667A
Cited
US4601546A
Cited
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