Liquid crystal display with compensator having two films with positive and negative intrinsic birefringence, respectively
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United States of America Patent
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Aug 11, 1992
Grant Date -
N/A
app pub date -
Oct 26, 1990
filing date -
Oct 27, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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, characterized in that 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.
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