Patent US5617230A successfully refreshed from Google Patents.
US5617230A
Expired / Lapsed
US
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Color liquid crystal display device with peripheral pixels in a light-shielded state
Assignee: Kyocera Display Corp
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Filing: 1994-08-09
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Granted: 1997-04-01
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Expires: 2014-08-09
Abstract
Abstract A color liquid crystal display device comprising light shielding layers and color filters on the inner surface of a cell, wherein similar light shielding layers and color filters are disposed also in a peripheral region outside of a display region which is equipped with groups of striped row and column electrodes opposed mutually to form pixels for display. The respective patterns of the light shielding layers and the color filters are the same in both the display region and the peripheral region. A liquid crystal layer formed in the display device has a twist angle of 160° to 300°, and a retardation compensator composed of a film is superposed on such layer so as to compensate the elliptical polarization. And a non-selective voltage is applied continuously to the scanning electrodes in the peripheral region so as to maintain the peripheral pixels in a light-shielded state, thereby rendering the display easier to be seen. Furthermore, due to overlaps of the color filters and the light shielding layers in both the display region and the peripheral region, the gap between the substrates is retained substantially uniform to minimize the nonuniformity of the backgroud color.
Inventors
- 👤 Masao Ohgawara
- 👤 Hiroyoshi Tsubota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:37
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133512; G02F1/133514; G02F1/1343; G02F1/134309; G02F1/134336
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
119 words
A color liquid crystal display device comprising: a liquid crystal layer having a twist angle of 160° to 300°; a retardation compensator superposed on said liquid crystal layer so as to compensate elliptical polarization derived from said liquid crystal layer; a substrate having a display region and a peripheral region; a group of first mutually opposed electrodes formed on the substrate in the display region; a first color filter formed in a pixel portion in the display region; a patterned layer including a first light shielding layer formed in the display region; a second frame-shaped light shielding layer formed in the peripheral region; and a second color filter overlapped with said second light shielding layer in the peripheral region.
Claim 2
Dependent Claim
119 words
A color liquid crystal display device comprising: a liquid crystal layer having a twist angle of 160° to 300°; a retardation compensator superposed on said liquid crystal layer so as to compensate elliptical polarization derived from said liquid crystal layer; a substrate having a display region and a peripheral region; a group of first mutually opposed electrodes formed on the substrate in the display region; a first color filter formed in a pixel portion in the display region; a patterned layer including a first light shielding layer formed in the display region; a second frame-shaped light shielding layer formed in the peripheral region; and a second color filter overlapped with said second light shielding layer in the peripheral region.
Claim 3
Dependent Claim
55 words
The color liquid crystal display device according to claim 1, wherein the first and second light shielding layers in both the display region and peripheral region are each comprised of a thin film and the first and second color filters in both the display region and peripheral region are each comprised of a thick film.
Claim 4
Dependent Claim
35 words
The color liquid crystal display device according to claim 2, further comprising a leveling layer formed on the first and second color filters and light shielding layers in both the display region and peripheral region.
Claim 5
Dependent Claim
24 words
The color liquid crystal display according to claim 2, wherein the first and second color filters comprise color filters of red, blue and green.
Claim 6
Dependent Claim
29 words
The color liquid crystal display according to claim 2, wherein the second light shielding layer in the peripheral region is formed over an entire surface of the peripheral region.
Claim 7
Dependent Claim
30 words
The color liquid crystal display device according to claim 1, wherein the second light shielding layer in the peripheral region is formed over an entire surface of the peripheral region.
Claim 8
Dependent Claim
28 words
The color liquid crystal display according to claim 1, wherein the second light shielding layer is patterned with openings for the second color filter in the peripheral region.
Claim 9
Dependent Claim
55 words
The color liquid crystal display device according to claim 7, wherein the first and second light shielding layers in both the display region and peripheral region are each comprised of a thin film and the first and second color filters in both the display region and peripheral region are each comprised of a thick film.
Claim 10
Dependent Claim
24 words
The color liquid crystal display according to claim 7, wherein the first and second color filters comprise color filters of red, blue and green.
Claim 11
Dependent Claim
35 words
The color liquid crystal display device according to claim 7, further comprising a leveling layer formed on the first and second color filters and light shielding layers in both the display region and peripheral region.
Claim 12
Dependent Claim
35 words
The color liquid crystal display device according to claim 1, further comprising a leveling layer formed on the first and second color filters and light shielding layers in both the display region and peripheral region.
Claim 13
Dependent Claim
29 words
The color liquid crystal display according to claim 1, wherein an area of said second color filter is 50 to 100% of an area of said first color filter.
Claim 14
Dependent Claim
25 words
The color liquid crystal display according to claim 1, further comprising second groups of mutually opposed electrodes formed on the substrate in the peripheral region.
Claim 15
Dependent Claim
20 words
The color liquid crystal display according to claim 13, wherein the second groups of mutually opposed electrodes are not driven.
Claim 16
Dependent Claim
175 words
A color liquid crystal display device comprising: a liquid crystal layer having a twist angle of 160° to 300°; a retardation compensator superposed on said liquid crystal layer so as to compensate elliptical polarization derived from said liquid crystal layer; a substrate having a display region and a peripheral region; a group of first mutually opposed electrodes formed on the substrate in the display region; a plurality of first color filters formed in pixel portions in the display region; a plurality of first light shielding layers formed in the display region; a plurality of second frame-shaped light shielding layers formed in the peripheral region; a plurality of second color filters overlapped with said second light shielding layers in the peripheral region; wherein the first and second light shielding layers in both the display region and peripheral region are comprised of thin films and the first and second color filters in both the display region and peripheral region are comprised of thick films; and wherein the peripheral region has a width of several to twenty-and-odd millimeters.
Claim 17
Dependent Claim
175 words
A color liquid crystal display device comprising: a liquid crystal layer having a twist angle of 160° to 300°; a retardation compensator superposed on said liquid crystal layer so as to compensate elliptical polarization derived from said liquid crystal layer; a substrate having a display region and a peripheral region; a group of first mutually opposed electrodes formed on the substrate in the display region; a plurality of first color filters formed in pixel portions in the display region; a plurality of first light shielding layers formed in the display region; a plurality of second frame-shaped light shielding layers formed in the peripheral region; a plurality of second color filters overlapped with said second light shielding layers in the peripheral region; wherein the first and second light shielding layers in both the display region and peripheral region are comprised of thin films and the first and second color filters in both the display region and peripheral region are comprised of thick films; and wherein the peripheral region has a width of several to twenty-and-odd millimeters.
Claim 18
Dependent Claim
25 words
The color liquid crystal display according to claim 15, further comprising second groups of mutually opposed electrodes formed on the substrate in the peripheral region.
Claim 19
Dependent Claim
29 words
The color liquid crystal display according to claim 15, wherein an area of said second color filters is 50 to 100% of an area of said first color filters.
Claim 20
Dependent Claim
24 words
The color liquid crystal display according to claim 15, wherein the first and second color filters comprise color filters of red, blue and green.
Claim 21
Dependent Claim
198 words
A color liquid crystal display device comprising: a liquid crystal layer having a twist angle of 160° to 300°; a retardation compensator superposed on said liquid crystal layer so as to compensate elliptical polarization derived from said liquid crystal layer; a substrate having a display region and a peripheral region; a group of first mutually opposed electrodes formed on the substrate in the display region; a plurality of first color filters formed in pixel portions in the display region; a plurality of first light shielding layers formed in the display region; a plurality of second frame-shaped light shielding layers formed in the peripheral region; a plurality of second color filters overlapped with said second light shielding layers in the peripheral region; wherein the first and second light shielding layers in both the display region and peripheral region are comprised of thin films and the first and second color filters in both the display region and peripheral region are comprised of thick films; wherein a leveling layer is further formed on the color filters and light shielding layers in both the display region and peripheral region; and wherein the peripheral region has a width of several to twenty-and-odd millimeters.
Claim 22
Dependent Claim
198 words
A color liquid crystal display device comprising: a liquid crystal layer having a twist angle of 160° to 300°; a retardation compensator superposed on said liquid crystal layer so as to compensate elliptical polarization derived from said liquid crystal layer; a substrate having a display region and a peripheral region; a group of first mutually opposed electrodes formed on the substrate in the display region; a plurality of first color filters formed in pixel portions in the display region; a plurality of first light shielding layers formed in the display region; a plurality of second frame-shaped light shielding layers formed in the peripheral region; a plurality of second color filters overlapped with said second light shielding layers in the peripheral region; wherein the first and second light shielding layers in both the display region and peripheral region are comprised of thin films and the first and second color filters in both the display region and peripheral region are comprised of thick films; wherein a leveling layer is further formed on the color filters and light shielding layers in both the display region and peripheral region; and wherein the peripheral region has a width of several to twenty-and-odd millimeters.
Claim 23
Dependent Claim
25 words
The color liquid crystal display according to claim 19, further comprising second groups of mutually opposed electrodes formed on the substrate in the peripheral region.
Claim 24
Dependent Claim
29 words
The color liquid crystal display according to claim 19, wherein an area of said second color filters is 50 to 100% of an area of said first color filters.
Claim 25
Dependent Claim
24 words
The color liquid crystal display according to claim 19, wherein the first and second color filters comprise color filters of red, blue and green.
Claim 26
Dependent Claim
161 words
A color liquid crystal display device comprising: a substrate having a display region and a peripheral region; first groups of mutually opposed electrodes formed on the substrate in the display region; a plurality of first color filters formed in pixel portions of the display region, each of the first color filters occupying a first predetermined area; a plurality of first light shielding layers formed between pixel portions in the display region; a plurality of second color filters formed in the peripheral region, each of the second filters occupying a second predetermined area; and a plurality of second light shielding layers formed in the peripheral region; wherein the first light shielding layers overlap the first color filters in the display region and the second light shielded layers overlap the second color filters in the peripheral region; and wherein the first predetermined area of the first color filters is greater than or equal to the second predetermined area of the second color filters.
Claim 27
Dependent Claim
161 words
A color liquid crystal display device comprising: a substrate having a display region and a peripheral region; first groups of mutually opposed electrodes formed on the substrate in the display region; a plurality of first color filters formed in pixel portions of the display region, each of the first color filters occupying a first predetermined area; a plurality of first light shielding layers formed between pixel portions in the display region; a plurality of second color filters formed in the peripheral region, each of the second filters occupying a second predetermined area; and a plurality of second light shielding layers formed in the peripheral region; wherein the first light shielding layers overlap the first color filters in the display region and the second light shielded layers overlap the second color filters in the peripheral region; and wherein the first predetermined area of the first color filters is greater than or equal to the second predetermined area of the second color filters.
Claim 28
Dependent Claim
35 words
The color liquid crystal display device according to claim 23, wherein the first and second light shielding layers are comprised of thin films and the first and second color filters are comprised of thick films.
Claim 29
Dependent Claim
30 words
The color liquid crystal display device according to claim 23, wherein the first and second light shielding layers and the first and second color filters are comprised of thick films.
Claim 30
Dependent Claim
26 words
The color liquid crystal display device according to claim 23, further comprising second groups of mutually opposed electrodes formed on the substrate in the peripheral region.
Claim 31
Dependent Claim
45 words
The color liquid crystal display device according to claim 23, further comprising a liquid crystal layer having a twist angle of 160° to 300° and a retardation compensator on said liquid crystal layer so as to compensate elliptical polarization derived from said liquid crystal layer.
Claim 32
Dependent Claim
20 words
The color liquid crystal display device according to claim 27, wherein said retardation compensator is comprised of a retardation film.
Claim 33
Dependent Claim
21 words
The color liquid crystal display device according to claim 27, wherein said retardation compensator is comprised of a liquid crystal layer.
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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) | 2000-03-31 | 2000-09-30 | 2001-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-31 | 2004-09-30 | 2005-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-31 | 2008-09-30 | 2009-04-01 | $7700.00 | Window Closed / Lapsed |