EP0484163A2
Expired / Lapsed
EP
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Liquid crystal display device
Assignee: Sharp Corp
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Filing: 1991-10-31
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Granted: —
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Expires: 2011-10-31
Abstract
Abstract A liquid crystal display device comprising: a first substrate having a signal electrode and a scanning electrode insulated from each other through an insulating layer, the first substrate being further provided with a switching transistor and a pixel electrode both in association with an intersection of the signal electrode and the scanning electrode; a liquid crystal layer containing a liquid crystal material of a positive dielectric anisotropy dispersed or impregnated in a transparent fluoro-type polymer; and a second substrate having a counter electrode to be placed at least opposite to the pixel electrode, the first and second substrate being disposed as opposed to each other so as to sandwich the liquid crystal layer.
Inventors
- 👤 Toshiyuki Hirai
- 👤 Shuichi Kozaki
- 👤 Fumiaki Funada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 11:03
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/542; C09K19/544
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
113 words
A liquid crystal display device comprising: a first substrate having a signal electrode and a scanning electrode insulated from each other through an insulating layer, said first substrate being further provided with a switching transistor and a pixel electrode both in association with an intersection of said signal electrode and said scanning electrode; a liquid crystal layer containing a liquid crystal material of a positive dielectric anisotropy dispersed or impregnated in a transparent fluoro-type polymer; and a second substrate having a counter electrode to be placed at least opposite to said pixel electrode, said first and second substrate being disposed as opposed to each other so as to sandwich said liquid crystal layer.
Claim 2
Dependent Claim
37 words
A liquid crystal display device as set forth in claim 1, wherein said liquid crystal layer contains 150-900 weight parts of said liquid crystal material dispersing or impregnating in 100 weight parts of said transparent fluoro-type polymer.
Claim 3
Dependent Claim
28 words
A liquid crystal display device as set forth in claim 1, wherein said transparent fluoro-type polymer is a homopolymer of a fluorine-containing vinyl monomer or a copolymer thereof.
Claim 4
Dependent Claim
63 words
A liquid crystal display device as set forth in claim 1, wherein said liquid crystal layer is formed by filling a homogeneous mixture solution of said liquid crystal material and a polymerizable fluoro-type composition in the space between said first and second substrates, and then polymerizing and curing said polymerizable fluoro-type composition thereby dispersing said liquid crystal material in said transparent fluoro-type polymer.
Claim 5
Dependent Claim
22 words
A liquid crystal display device as set forth in claim 4, wherein said polymerizable fluoro-type composition comprises tetrafluoroethylene, hexafluoroethylene or perfluorooctylethyl acrylate.
Claim 6
Dependent Claim
47 words
A liquid crystal display device as set forth in claim 1, wherein said liquid crystal layer is formed by forming previously a porous material composed of said transparent fluoro-type polymer between said first and second substrates, and then impregnating said liquid crystal material in said porous material.
Claim 7
Dependent Claim
59 words
A liquid crystal display device as set forth in claim 1, wherein said liquid crystal layer is formed by mixing said fluoro-type polymer, said liquid crystal material and a solvent to form a solution, applying said solution to said first and/or second substrates, and then evaporating said solvent off thereby dispersing said liquid crystal material in said fluoro-type polymer.
Claim 8
Dependent Claim
100 words
A liquid crystal display device comprising a plurality of pixels, and a plurality of pixel electrodes arranged in a matrix pattern, a respective switching element for connecting each pixel electrode to one of a plurality of signal electrodes for supplying a data signal to that pixel electrode in accordance with a scanning signal supplied by one of a plurality of scanning electrodes, a counter electrode and a liquid crystal layer containing a liquid crystal material disposed between the pixel electrodes and the counter electrode characterised in that the liquid crystal layer is dispersed in or impregnated with a fluoro-type polymer.
Claim 9
Dependent Claim
59 words
A liquid crystal display device according to claim 8 wherein the fluoro-type polymer comprises one of vinylidene fluoride-tetrafluoroethylene copolymer, vinylidene fluoride-chlorotrifluoroethylene copolymer, vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene terpolymer, polytrifluoroethylene, polytetrafluoroethylene, polyperfluorooctyl methacrylate, polyperfluorooctylethyl acrylate, polytrifluoroethyl acrylate, poly-2,2,3,3-tetrafluoropropyl acrylate, polyperfluorooctyl acrylate, perfluorooctylethyl acrylate-2-ethylhexyl acrylate copolymer, trifluoroethyl acrylate-2-ethylhexyl acrylate copolymer, 2,2,3,3-tetrafluoropropyl acrylate-2-ethylhexyl acrylate copolymer, perfluorooctyl acrylate-2-ethylhexyl acrylate copolymer, tetrafluoroethylene-perfluoropropoxyethylene copolymer or any combination thereof.
Claim 10
Dependent Claim
32 words
A liquid crystal display device according to claim 8 wherein the fluoro-type polymer comprises one of polytrifluoroethylene, polytetrafluoroethylene, polyperfluorooctyl methacrylate, polyperfluorooctylethyl acrylate, polytrifluoroethyl acrylate, poly-2,2,3,3-tetrafluoropropyl acrylate, polyperfluorooctyl acrylate, or any combination thereof.
Claim 11
Dependent Claim
16 words
A liquid crystal display device according to claim 10 wherein the fluoro-type polymer is a homopolymer.
Claim 12
Independent Claim
149 words
A method of forming a liquid crystal display device having a plurality of pixels, and a plurality of pixel electrodes arranged in a matrix pattern, a switching element for connecting each pixel electrode to one of a plurality of signal electrodes for supplying a data signal, in accordance with a scanning signal supplied by one of a plurality of scanning electrodes, a counter electrode and a liquid crystal layer containing a liquid crystal material disposed between the pixel electrodes and the counter electrode characterised in that the liquid crystal material is dispersed in or impregnated with a transparent fluorotype polymer comprising the steps: dispersing the liquid crystal material in the transparent fluoro-type polymer; forming the plurality of scanning, signal and pixel electrodes, and switching elements on a first substrate; forming the counter electrodes on a second substrate; and sandwiching the liquid crystal layer between the first and second substrates.
Claim 13
Dependent Claim
56 words
A liquid crystal display device having a plurality of pixels comprising a liquid crystal layer and a plurality of electrodes arranged to selectively allow light transmission through the liquid crystal layer in respective pixel regions in accordance with electrical signals characterised in that the liquid crystal material is dispersed in or impregnated with a fluoro-type polymer.
References Cited (Backward Citations)
No citation records indexed.
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