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US5142392A Expired / Lapsed US ⏱️ 0.0 years remaining

Color liquid crystal display having light shielding layers and method of manufacturing thereof

Assignee: Toshiba Corp
•
Filing: 1991-04-30
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Granted: 1992-08-25
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Expires: 2011-04-30
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Abstract

Abstract Disclosed is a color liquid crystal display device having a plurality of pixels, in which conductive films are arranged at regions corresponding to the respective pixels, a light-shielding conductive layer is connected to the conductive films and extends in a region between the pixels, and color filters are formed on the conductive films. In the method of manufacturing such color liquid crystal display device, a light-shielding conductive layer is formed on a substrate, part of the light-shielding layer corresponding to a pixel for which a filter is to be formed is removed from the substrate on which the light-shielding layer is formed and simultaneously the light-shielding layer is partially removed so that portions thereof corresponding to at least pixels having different colors are electrically insulated from each other, a conductive film is formed at a portion corresponding to the pixel for which the filter is to be formed, and films having colors corresponding to those of the respective pixels are formed on the surface of the conductive film.

Inventors

  • 👤 Toshihiro Ueki
  • 👤 Yasuhisa Oana
  • 👤 Hitoshi Tomii

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 14:05
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: 4
Claim 1
Independent Claim 112 words
A method of manufacturing a color liquid crystal display device, comprising the steps of: forming a light-shielding conductive layer on a substrate; removing part of said light-shielding layer corresponding to pixels for which filters are to be formed from said substrate on which said light-shielding layer is formed, and simultaneously removing part of said light-shielding layer so that portions thereof corresponding to at least pixels of different colors are electrically insulated from each other; forming a conductive film at a portion corresponding to said pixel for which said filter is to be formed; and forming films having colors corresponding to those of the respective pixels on a surface of said conductive film.
Claim 2
Independent Claim 112 words
A method of manufacturing a color liquid crystal display device, comprising the steps of: forming a light-shielding conductive layer on a substrate; removing part of said light-shielding layer corresponding to pixels for which filters are to be formed from said substrate on which said light-shielding layer is formed, and simultaneously removing part of said light-shielding layer so that portions thereof corresponding to at least pixels of different colors are electrically insulated from each other; forming a conductive film at a portion corresponding to said pixel for which said filter is to be formed; and forming films having colors corresponding to those of the respective pixels on a surface of said conductive film.
Claim 3
Dependent Claim 24 words
The method of claim 1, wherein said conductive film is electrically connected to the light-shielding layer formed on the periphery of said conductive film.
Claim 4
Dependent Claim 35 words
The method of claim 1 or 2, wherein the step of forming films having colors corresponding to those of the respective pixels on said surface of said conductive film is performed by an electrodeposition method.

References Cited (Backward Citations)

EP0179922A1 Cited
JPS6222629A Cited
JPS62150221A Cited
US4712874A Cited
EP0238174A2 Cited
JPS62291677A Cited
US4950058A Cited
JPH0643631A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-08-25 1996-02-24 1996-08-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-08-25 2000-02-24 2000-08-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-08-25 2004-02-24 2004-08-25 $7700.00 Window Closed / Lapsed

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