Patent EP0424951B1 successfully refreshed from Google Patents.
EP0424951B1
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EP
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Liquid crystal display
Assignee: Fujifilm Holdings Corp
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Filing: 1990-10-26
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Granted: 1995-01-25
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Expires: 2010-10-26
Abstract
No abstract record available.
Inventors
- 👤 Kohei C/O Fuji Photo Film Co. Ltd. Arakawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:34
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/13363; G02F2413/00; G02F2413/02; G02F2413/07; G02F2413/08; G02F2413/13; G02F2413/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
169 words
A liquid crystal display comprising a liquid crystal element, at least two birefringent films and a pair of polarizing sheets so arranged that said element and said films are held therebetween, said liquid crystal element comprising a cell composed of two sheets of substrates and a twisted nematic liquid crystal, each substrate being provided with an electrode on one surface thereof, said substrates being arranged so that the electrodes are opposed to each other and said twisted nematic liquid crystal being held between said electrodes, wherein said birefringent films are composed of at least one uniaxially stretched film of a polymer having a positive intrinsic birefringence and light transmission properties and at least one uniaxially stretched film of a polymer having a negative intrinsic birefringence and light transmission properties, the display being characterized in that said uniaxially stretched film having a positive intrinsic birefringence and said uniaxially stretched film having a negative intrinsic birefringence are laminated onto each other with their optic axes at right angles with each other.
Claim 2
Dependent Claim
40 words
A liquid crystal display as claimed in claim 1, wherein said polymer having a positive intrinsic birefringence is selected from polycarbonates, polyarylates, polyethylene terephthalate, polyether sulfone, polyphenylene sulfide, polyphenylene oxide, polyallyl sulfone, polyamideimides, polyimides, polyolefins, polyvinyl chloride, cellulose and polysters.
Claim 3
Dependent Claim
24 words
A liquid crystal display as claimed in claim 2, wherein said polymer having a positive intrinsic birefringenece is selected from polycarbonates, polyarylates and polyesters.
Claim 4
Dependent Claim
36 words
A liquid crystal display as claimed in claim 1, 2 or 3 wherein said polymer having a negative intrinsic birefringence is selected from styrene polymers, acrylic ester polymers, methacrylic ester polymers, acrylonitrile polymers and methacrylonitrile polymers.
Claim 5
Dependent Claim
21 words
A liquid crystal display as claimed in claim 4, wherein said polymer having a negative intrinsic birefringence is a styrene polymer.
Claim 6
Dependent Claim
30 words
A liquid crystal display as claimed in claim 1, wherein at least one of said birefringent films has a thickness in a range of from 10 µ to 1 mm.
References Cited (Backward Citations)
No citation records indexed.
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