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US5745201A Expired / Lapsed US ⏱️ 0.0 years remaining

Matrix type display device

Assignee: Sharp Corp
•
Filing: 1996-10-02
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Granted: 1998-04-28
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Expires: 2016-10-02
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Abstract

Abstract An object of the invention is to facilitate identifying the display color of each pixel during a test process and to apply a correction to a defective switching device in accordance with a test criterion established for each display color. On one transparent substrate, there are formed gate wiring and source wirings intersecting at right angles to each other so that insulation therebetween is maintained, and a pixel electrode and a TFT device are formed for each pixel, thus constructing one substrate member. On another transparent substrate, there is formed a counter electrode facing the pixel electrodes, and identifying means for identifying the display color of each pixel is formed on the side opposite from the side where the counter electrode is formed, the identifying means then being covered with a light-blocking member, thus constructing the another substrate member. The light-blocking member contains openings formed therethrough in portions facing the pixel electrodes. Since the display color of each pixel can be identified using the identifying means, a defective switching device in a pixel can be corrected in accordance with a correction criterion established for each display color.

Inventors

  • 👤 Katsuhiro Kawai
  • 👤 Satoshi Yabuta
  • 👤 Masaya Okamoto
  • 👤 Masaru Kajitani

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 02:33
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/1306; G02F1/1309; G02F1/133; G02F1/136; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133512; G02F1/1362; G02F1/136259; G02F1/136268

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 116 words
A matrix type display device comprising: one substrate member comprising gate wirings arranged at intervals in parallel to each other, source wirings arranged at right angles with the gate wirings so that insulation therebetween is maintained, a plurality of pixel electrodes arranged for each rectangular pixel formed by the intersection of the gate and source wirings, and switching devices which individually connect the pixel electrodes to the gate and source wirings; and another substrate member comprising a counter electrode facing the pixel electrodes, and a light-blocking member containing openings at least in regions thereof facing the pixel electrodes; wherein either the one substrate member or the another substrate member has identifying means for identifying specific pixels.
Claim 2
Dependent Claim 116 words
A matrix type display device comprising: one substrate member comprising gate wirings arranged at intervals in parallel to each other, source wirings arranged at right angles with the gate wirings so that insulation therebetween is maintained, a plurality of pixel electrodes arranged for each rectangular pixel formed by the intersection of the gate and source wirings, and switching devices which individually connect the pixel electrodes to the gate and source wirings; and another substrate member comprising a counter electrode facing the pixel electrodes, and a light-blocking member containing openings at least in regions thereof facing the pixel electrodes; wherein either the one substrate member or the another substrate member has identifying means for identifying specific pixels.
Claim 3
Dependent Claim 39 words
The matrix type display device of claim 1, wherein a display color for each pixel is predetermined, and the identifying means serves as a guide to recognize a display color or absolute position of a pixel with high accuracy.
Claim 4
Dependent Claim 19 words
The matrix type display device of claim 1, wherein the identifying means is provided on the another substrate member.
Claim 5
Dependent Claim 24 words
The matrix type display device of claim 3, wherein the light-blocking member is formed in such a manner as to cover the identifying means.
Claim 6
Dependent Claim 21 words
The matrix type display device of claim 3, wherein the identifying means is formed by patterning portions of the light-blocking member.
Claim 7
Dependent Claim 23 words
The matrix type display device of claim 5, wherein the identifying means is a notch formed in each opening of the light-blocking member.
Claim 8
Dependent Claim 24 words
The matrix type display device of claim 5, wherein the identifying means is a projection piece formed in each opening of the light-blocking member.
Claim 9
Dependent Claim 19 words
The matrix type display device of claim 1, wherein the identifying means is provided on the one substrate member.
Claim 10
Dependent Claim 27 words
The matrix type display device of claim 8, wherein the gate wirings or source wirings are formed in such a manner as to cover the identifying means.
Claim 11
Dependent Claim 24 words
The matrix type display device of claim 8, wherein the identifying means is formed by patterning portions of the gate wirings or source wirings.
Claim 12
Dependent Claim 23 words
The matrix type display device of claim 10, wherein the identifying means is a notch formed in each gate wiring or source wiring.
Claim 13
Dependent Claim 23 words
The matrix display device of claim 10, wherein the identifying means is a projection piece formed in each gate wiring or source wiring.

References Cited (Backward Citations)

US5085973A Cited
JPH04319913A Cited
EP0524067A1 Cited
JPH0651290A Cited
JPH0682762A Cited
JPH06138456A Cited
JPH08504962A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2001-04-27 2001-10-27 2002-04-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2005-04-27 2005-10-27 2006-04-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2009-04-27 2009-10-27 2010-04-28 $7700.00 Window Closed / Lapsed

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