Liquid crystal display
First Claim
1. A liquid crystal display comprising a liquid crystal cell which comprises a pair of substrates each of which is provided with a transparent electrode and twist-oriented nematic liquid crystal sealed therebetween, a polarizing sheet arranged on each side of the liquid crystal cell, and an optical compensatory sheet provided between at least one side of the liquid crystal cell and the polarizing sheet;
- wherein the optical compensatory sheet comprises a transparent support having a negative uniaxial property and a layer provided thereon which is prepared from a discotic liquid crystal of a low molecular weight.
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Accused Products
Abstract
Disclosed is a liquid crystal display provided with an optical compensatory sheet consisting essentially of a transparent support and a layer prepared from a discotic liquid crystal of a low molecular weight, or an optical compensatory sheet which has the minimum of absolute values of retardation values in a direction inclined from the normal of the sheet and has no optic axis.
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Citations
21 Claims
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1. A liquid crystal display comprising a liquid crystal cell which comprises a pair of substrates each of which is provided with a transparent electrode and twist-oriented nematic liquid crystal sealed therebetween, a polarizing sheet arranged on each side of the liquid crystal cell, and an optical compensatory sheet provided between at least one side of the liquid crystal cell and the polarizing sheet;
wherein the optical compensatory sheet comprises a transparent support having a negative uniaxial property and a layer provided thereon which is prepared from a discotic liquid crystal of a low molecular weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A liquid crystal display comprising a liquid crystal cell which comprises a pair of substrates each of which is provided with a transparent electrode and twist-oriented nematic liquid crystal sealed them between, a polarizing sheet arranged on each side of the liquid crystal cell, and an optical compensatory sheet provided between at least one side of the liquid crystal cell and the polarizing sheet;
wherein the optical compensatory sheet has an optical anisotropy wherein the minimum of absolute values of retardation values in the directions at all angles to the normal of the sheet is not present in the normal direction and a surface direction of the sheet and the retardation value of the sheet is not zero in any direction. - View Dependent Claims (12, 13, 14, 15)
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16. A liquid crystal display comprising a liquid crystal cell which comprises a pair of substrates each of which is provided with a transparent electrode and twist-oriented nematic liquid crystal sealed therebetween, a polarizing sheet arranged on each side of the liquid crystal cell, and an optical compensatory sheet provided between at least one side of the liquid crystal cell and the polarizing sheet;
wherein the optical compensatory sheet comprises a transparent support, an orientation film thereon and a layer provided on the orientation film which is prepared from a discotic liquid crystal of a low molecular weight, the orientation layer being a film of polyvinyl alcohol having an alkyl group which has been subjected to rubbing treatment. - View Dependent Claims (17, 18)
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19. A liquid crystal display comprising a liquid crystal cell which comprises a pair of substrates each of which is provided with a transparent electrode and twist-oriented nematic liquid crystal sealed therebetween, a polarizing sheet arranged on each side of the liquid crystal cell, and an optical compensatory sheet provided between at least one side of the liquid crystal cell and the polarizing sheet;
wherein the optical compensatory sheet comprises a transparent support and a layer provided thereon which is prepared from a discotic liquid crystal of a low molecular weight, the transparent support having a light transmittance of not less than 80%, showing optically isotropy on the plane of the support, and satisfying the condition of;
space="preserve" listing-type="equation">30≦
{(nx+ny)/2-nz}×
d≦
150in which nx and ny are main refractive indices on the plane of the support, nz is a main refractive index in the thickness direction, and d is the thickness of the support, unit of d being nm. - View Dependent Claims (20, 21)
Specification