US5978059A
Expired / Lapsed
US
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Liquid crystal display device with wide viewing angle characteristics
Assignee: Panasonic Liquid Crystal Display Co Ltd
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Filing: 1998-05-15
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Granted: 1999-11-02
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Expires: 2018-05-15
Abstract
Abstract A liquid crystal display device including a first substrate and a second substrate having a liquid crystal composition layer disposed therebetween, a black matrix formed on at least one of the first substrate and the second substrate, and a video signal line formed between a face of the first substrate and a face of the liquid crystal composition layer. At least one pixel electrode is formed at each of pixels adjoining each other through the video signal line and fed with a selected video signal through the video signal line, and at least one counter electrode is fed with a counter voltage. An optical transmissivity of the liquid crystal composition layer is controlled by an electric field component which is generated between the pixel electrode and the counter electrode. One of the counter electrodes of the individual pixels is positioned at opposite sides of the video signal line, and the black matrix is formed over the video signal line. The black matrix has a widthwise contour which extends at least as far as the counter electrodes positioned adjacent to the opposite sides of the video signal line.
Inventors
- 👤 Masuyuki Ohta
- 👤 Kazuhiko Yanagawa
- 👤 Keiichiro Ashizawa
- 👤 Yasuyuki Mishima
- 👤 Kazuhiro Ogawa
- 👤 Masahito Ohe
- 👤 Masahiro Yanai
- 👤 Katsumi Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:53
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/1335; G02F1/133509; G02F1/133512; G02F1/134309; G02F1/134363; G02F1/136; G02F1/1362; G02F1/136286
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
189 words
A liquid crystal display device comprising: a first substrate and a second substrate having a liquid crystal composition layer disposed therebetween; a black matrix formed on at least one of said first substrate and said second substrate; a video signal line formed between a face of said first substrate and a face of said liquid crystal composition layer; and at least one pixel electrode formed at each of pixels adjoining each other through said video signal line and fed with a selected video signal through said video signal line, and at least one counter electrode fed with a counter voltage; whereby an optical transmissivity of said liquid crystal composition layer is controlled by an electric field component which is generated between said pixel electrode and said counter electrode, wherein one of said counter electrodes of the individual pixels is positioned at opposite sides of said video signal line, and wherein said black matrix is formed over said video signal line, and said black matrix has a widthwise contour which extends at least as far as said counter electrodes positioned adjacent to the opposite sides of said video signal line.
Claim 2
Dependent Claim
189 words
A liquid crystal display device comprising: a first substrate and a second substrate having a liquid crystal composition layer disposed therebetween; a black matrix formed on at least one of said first substrate and said second substrate; a video signal line formed between a face of said first substrate and a face of said liquid crystal composition layer; and at least one pixel electrode formed at each of pixels adjoining each other through said video signal line and fed with a selected video signal through said video signal line, and at least one counter electrode fed with a counter voltage; whereby an optical transmissivity of said liquid crystal composition layer is controlled by an electric field component which is generated between said pixel electrode and said counter electrode, wherein one of said counter electrodes of the individual pixels is positioned at opposite sides of said video signal line, and wherein said black matrix is formed over said video signal line, and said black matrix has a widthwise contour which extends at least as far as said counter electrodes positioned adjacent to the opposite sides of said video signal line.
Claim 3
Dependent Claim
23 words
A liquid crystal display device as set forth in claim 1, wherein the electric field component is substantially parallel to said first substrate.
Claim 4
Dependent Claim
36 words
A liquid crystal display device as set forth in claim 1, wherein said black matrix is formed so that the widthwise contour thereof extends at least partially over the counter electrodes adjacent said video signal line.
Claim 5
Dependent Claim
35 words
A liquid crystal display device as set forth in claim 3, wherein the widthwise contour of said black matrix extends over the counter electrodes adjacent said video signal line without extending beyond the counter electrodes.
Claim 6
Dependent Claim
19 words
A liquid crystal display device as set forth in claim 1, wherein said black matrix has an insulating property.
Claim 7
Dependent Claim
26 words
A liquid crystal display device as set forth in claim 1, wherein said black matrix is prepared by mixing a black pigment into a resist material.
Claim 8
Dependent Claim
28 words
A liquid crystal display device as set forth in claim 1, wherein said black matrix is prepared by mixing palladium or electrolessly plated Ni into a resist material.
Claim 9
Dependent Claim
48 words
A liquid crystal display device as set forth in any one of the claims 1 and 3 to 5, further comprising: polarizing plates arranged on individual surfaces of said first substrate and said second substrate such that polarizing axes thereof intersect at a right angle with each other.
Claim 10
Dependent Claim
37 words
A liquid crystal display device as set forth in any one of the claims 1 and 3 to 5, wherein said liquid crystal composition layer has a dielectric anisotropy of at least 7.3 in an absolute value.
Claim 11
Dependent Claim
40 words
A liquid crystal display device as set forth in any one of the claims 1 and 3 to 5, wherein said liquid crystal composition layer has a positive dielectric anisotropy and a retardation more than 0.21 and less than 0.405.
Claim 12
Dependent Claim
40 words
A liquid crystal display device as set forth in any one of the claims 1 and 3 to 5, wherein said liquid crystal composition layer has a negative dielectric anisotropy and a retardation more than 0.168 and less than 0.48.
Claim 13
Dependent Claim
40 words
A liquid crystal display device as set forth in any one of the claims 1 and 3 to 5, wherein said liquid crystal composition layer has a positive dielectric anisotropy and a retardation more than 0.07 and less than 0.09.
Claim 14
Dependent Claim
40 words
A liquid crystal display device as set forth in any one of the claims 1 and 3 to 5, wherein said liquid crystal composition layer has a negative dielectric anisotropy and a retardation more than 0.04 and less than 0.06.
Claim 15
Dependent Claim
29 words
A liquid crystal display device as set forth in any one of the claims 1 and 3 to 5, wherein said opposed electrode is fed with an AC voltage.
Claim 16
Dependent Claim
48 words
A liquid crystal display device as set forth in any one of claims 1 and 3 to 5, further comprising: a plurality of pixels are formed between the face of said first substrate and the face of said liquid crystal composition layer and arranged in a matrix shape.
Claim 17
Dependent Claim
23 words
A liquid crystal display device as set forth in claim 15, wherein the plural pixels arranged in the matrix shape are active matrixes.
Claim 18
Dependent Claim
21 words
A liquid crystal display device as set forth in claim 16, wherein said active matrix is a thin film transistor matrix.
Claim 19
Dependent Claim
115 words
A liquid crystal display device as set forth in claim 1, wherein said liquid crystal composition layer has a dielectric anisotropy of at least 7.3 in an absolute value, said dielectric anisotropy being one of a positive and negative anisotropy, when said dielectric anisotropy is positive, said liquid crystal composition layer having a retardation of one of (a) more than 0.21 and less than 0.405 and (b) more than 0.07 and less than 0.04, and when said dielectric anisotropy of said liquid crystal composition layer is negative, said liquid crystal composition layer having a retardation of one of (c) more than 0.168 and less than 0.48 and (d) more than 0.04 and less than 0.06.
Claim 20
Dependent Claim
161 words
A liquid crystal display device comprising: a first substrate and a second substrate having a liquid crystal composition layer disposed therebetween; a black matrix formed on at least one of said first substrate and said second substrate; a video signal line formed between a face of said first substrate and a face of said liquid crystal composition layer; and individual pixels including at least one pixel electrode and counter electrode formed on one of said first substrate and said second substrate for generating an electric field having a component predominantly in parallel with said one of said first substrate and said second substrate; wherein one of said counter electrodes of the individual pixels is positioned adjacent to said video signal line, and wherein said black matrix is formed over said video signal line, and said black matrix has a widthwise contour which extends at least as far as said counter electrodes of adjacent pixels positioned adjacent to said video signal line.
Claim 21
Dependent Claim
161 words
A liquid crystal display device comprising: a first substrate and a second substrate having a liquid crystal composition layer disposed therebetween; a black matrix formed on at least one of said first substrate and said second substrate; a video signal line formed between a face of said first substrate and a face of said liquid crystal composition layer; and individual pixels including at least one pixel electrode and counter electrode formed on one of said first substrate and said second substrate for generating an electric field having a component predominantly in parallel with said one of said first substrate and said second substrate; wherein one of said counter electrodes of the individual pixels is positioned adjacent to said video signal line, and wherein said black matrix is formed over said video signal line, and said black matrix has a widthwise contour which extends at least as far as said counter electrodes of adjacent pixels positioned adjacent to said video signal line.
Claim 22
Dependent Claim
42 words
A liquid crystal display device as set forth in claim 19, wherein said black matrix is formed so that the widthwise contour thereof extends at least partially over said counter electrodes of said adjacent pixels positioned adjacent to said video signal line.
Claim 23
Dependent Claim
19 words
A liquid crystal display device as set forth in claim 19, wherein said black matrix has an insulating property.
Claim 24
Dependent Claim
26 words
A liquid crystal display device as set forth in claim 19, wherein said black matrix is prepared by mixing a black pigment into a resist material.
Claim 25
Dependent Claim
28 words
A liquid crystal display device as set forth in claim 19, wherein said black matrix is prepared by mixing palladium or electrolessly plated Ni into a resist material.
Claim 26
Dependent Claim
29 words
A liquid crystal display device as set forth in claim 19, wherein said liquid crystal composition layer has a dielectric anisotropy of at least 7.3 in an absolute value.
Claim 27
Dependent Claim
32 words
A liquid crystal display device as set forth in claim 19, wherein said liquid crystal composition layer has a positive dielectric anisotropy and a retardation more than 0.25 and less than 0.32.
Claim 28
Dependent Claim
32 words
A liquid crystal display device as set forth in claim 19, wherein said liquid crystal composition layer has a negative dielectric anisotropy and a retardation more than 0.25 and less than 0.32.
Claim 29
Dependent Claim
32 words
A liquid crystal display device as set forth in claim 19, wherein said liquid crystal composition layer has a positive dielectric anisotropy and a retardation more than 0.07 and less than 0.09.
Claim 30
Dependent Claim
32 words
A liquid crystal display device as set forth in claim 19, wherein said liquid crystal composition layer has a negative dielectric anisotropy and a retardation more than 0.04 and less than 0.06.
Claim 31
Dependent Claim
162 words
A liquid crystal display device comprising: a first substrate and a second substrate having a liquid crystal composition layer disposed therebetween; a black matrix formed on at least one of said first substrate and said second substrate; a video signal line formed between a face of said first substrate and a face of said liquid crystal composition layer; and individual pixels including at least one pixel electrode and counter electrode formed on one of said first substrate and second substrate for generating an electric field having a component predominantly in parallel with said one of said first substrate and said second substrate; wherein one of said counter electrodes of the individual pixels is positioned adjacent to said video signal line, and wherein said black matrix is formed over said video signal line, and said black matrix has a widthwise contour which extends over said counter electrodes of adjacent pixels positioned adjacent to said video signal line without extending beyond said counter electrodes.
Claim 32
Dependent Claim
162 words
A liquid crystal display device comprising: a first substrate and a second substrate having a liquid crystal composition layer disposed therebetween; a black matrix formed on at least one of said first substrate and said second substrate; a video signal line formed between a face of said first substrate and a face of said liquid crystal composition layer; and individual pixels including at least one pixel electrode and counter electrode formed on one of said first substrate and second substrate for generating an electric field having a component predominantly in parallel with said one of said first substrate and said second substrate; wherein one of said counter electrodes of the individual pixels is positioned adjacent to said video signal line, and wherein said black matrix is formed over said video signal line, and said black matrix has a widthwise contour which extends over said counter electrodes of adjacent pixels positioned adjacent to said video signal line without extending beyond said counter electrodes.
Claim 33
Dependent Claim
43 words
A liquid crystal display device as set forth in claim 29, wherein said black matrix has a widthwide contour which is delimited within the extent of the width of said counter electrodes of said adjacent pixels positioned adjacent to said video signal line.
Claim 34
Dependent Claim
20 words
A liquid crystal display device as set forth in claim 29, wherein said pixels are arranged in a matrix shape.
Claim 35
Dependent Claim
19 words
A liquid crystal display device as set forth in claim 29, wherein said matrix shape is an active matrix.
Claim 36
Dependent Claim
21 words
A liquid crystal display device as set forth in claim 29, wherein said active matrix is a thin film transistor matrix.
Claim 37
Dependent Claim
21 words
A liquid crystal display device as set forth in claim 29, wherein said counter electrodes are fed with an AC voltage.
Claim 38
Dependent Claim
40 words
A liquid crystal display device as set forth in claim 29, further comprising polarizing plates arranged on individual surfaces of said first substrate and said second substrate such that polarizing axes thereof intersect at a right angle with each other.
References Cited (Backward Citations)
JPS58116771A
Cited
JPS63309921A
Cited
US5568291A
Cited
US5412494A
Cited
JPH04268535A
Cited
US5548421A
Cited
US5598285A
Cited
JPH06202127A
Cited
JPH06214244A
Cited
JPH06250159A
Cited
US5600464A
Cited
JPH07128683A
Cited
US5751381A
Cited
JPH08179367A
Cited
JPH08320466A
Cited
US5754266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-01 | 2003-05-03 | 2003-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-01 | 2007-05-03 | 2007-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-01 | 2011-05-03 | 2011-11-02 | $7700.00 | Window Closed / Lapsed |