Patent US4953952A successfully refreshed from Google Patents.
US4953952A
Expired / Lapsed
US
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Color liquid crystal displaying panels
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1988-07-07
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Granted: 1990-09-04
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Expires: 2008-07-07
Abstract
Abstract A color liquid crystal display panel with improvements in brightness of display, viewing angle and workability which comprises a liquid crystal layer which is provided with two light-polarizing plates on opposite side as substrates. One of the light-polarizing plates is made, in the following order, from the light-polarizing layer, a color filter layer formed on the outside surface of a protective film layer, the protective film layer of non-rotary polarization polymer and a transparent conductive film layer formed on the inside surface of the protective film layer. The other light-polarizing plate is made in the following order, from the light-polarizing layer and a transparent conductive film layer.
Inventors
- 👤 Takuzo Okumura
- 👤 Toyokazu Okada
- 👤 Hitoshi Kikui
- 👤 Kazuo Nakata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:04
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/133528
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
201 words
A color liquid crystal display panel comprising: a liquid crystal layer; and a first light-polarizing plate arranged on a first side of said liquid crystal layer, said first light-polarizing plate including layers in the following order: a first exterior protective film layer of non-rotary polarization polymer, a first light-polarizing layer, a first color filter layer of three primary colors formed with pigments or dyes and having no polarizing layer, a second protective film layer comprising a non-rotatory polarization polymer having an outside surface upon which an inner surface of said first color filter layer is formed, and a first transparent conductive layer formed on the inside surface of said second protective film layer and being in contact with said liquid crystal layer; and a second light-polarizing plate arranged on a second side of said liquid crystal layer opposite to said first side, said second light-polarizing plate including layers in the following order: a third exterior protective film layer of non-rotatory polarization polymer, a second light-polarizing layer, a fourth protective film layer of non-rotatory polarization polymer and a second transparent conductive layer formed on an inside surface of said fourth protective film layer and being in contact with said liquid crystal layer.
Claim 2
Dependent Claim
201 words
A color liquid crystal display panel comprising: a liquid crystal layer; and a first light-polarizing plate arranged on a first side of said liquid crystal layer, said first light-polarizing plate including layers in the following order: a first exterior protective film layer of non-rotary polarization polymer, a first light-polarizing layer, a first color filter layer of three primary colors formed with pigments or dyes and having no polarizing layer, a second protective film layer comprising a non-rotatory polarization polymer having an outside surface upon which an inner surface of said first color filter layer is formed, and a first transparent conductive layer formed on the inside surface of said second protective film layer and being in contact with said liquid crystal layer; and a second light-polarizing plate arranged on a second side of said liquid crystal layer opposite to said first side, said second light-polarizing plate including layers in the following order: a third exterior protective film layer of non-rotatory polarization polymer, a second light-polarizing layer, a fourth protective film layer of non-rotatory polarization polymer and a second transparent conductive layer formed on an inside surface of said fourth protective film layer and being in contact with said liquid crystal layer.
Claim 3
Dependent Claim
30 words
A color liquid crystal display panel according to claim 1 wherein the non-rotatory polarization polymer used as a protective film is a polyethersulfone represented by the following structural formula: ##STR2##
Claim 4
Dependent Claim
21 words
A color liquid crystal display panel according to claim 1 wherein the liquid crystal layer is a twisted nematic liquid crystal.
Claim 5
Dependent Claim
21 words
A color liquid crystal display panel according to claim 1 further comprising a reflection film applied to said second light-polarizing plate.
Claim 6
Dependent Claim
28 words
A color liquid crystal display panel according to claim 1 further comprising a glass plate applied on at least one surface of the two outside protective film layers.
Claim 7
Dependent Claim
78 words
A light-polarizing plate comprising layers in the following order: a first exterior protective film layer of non-rotatory polarization polymer, a first light-polarizing layer, a color filter layer of three primary colors formed with pigments or dyes, a second protective film layer comprising a non-rotatory polarization polymer having an outside surface upon which an inside surface of said color filter layer is formed, and a transparent conductive layer formed on the inside surface of said second protective film layer.
Claim 8
Dependent Claim
78 words
A light-polarizing plate comprising layers in the following order: a first exterior protective film layer of non-rotatory polarization polymer, a first light-polarizing layer, a color filter layer of three primary colors formed with pigments or dyes, a second protective film layer comprising a non-rotatory polarization polymer having an outside surface upon which an inside surface of said color filter layer is formed, and a transparent conductive layer formed on the inside surface of said second protective film 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) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |