Optical compensatory sheet comprising substrate, orientation layer and optically anisotropic layer
AssigneeFuji Photo Film Co., Ltd.
InventorsYoji Ito, Shigeki Yokoyama, Masayuki Negoro, Ken Kawata
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Abstract
An optical compensatory sheet comprises a transparent substrate, an orientation layer and an optically anisotropic layer in order. The optically anisotropic layer comprises discotic liquid crystal molecules. The orientation layer comprises a denatured polyvinyl alcohol having a hydrocarbon group containing 10 to 100 carbon atoms or a denatured polyvinyl alcohol containing fluorine atoms. The discotic liquid crystal molecules are aligned at an average inclined angle in the range of 50° to 90°. An orientation layer, a liquid crystal display of an STN mode and a method of alignment of discotic liquid crystal molecules are also disclosed.
Claims10
An orientation layer provided on a support, said orientation layer having a function of aligning liquid crystal, wherein the orientation layer comprises a denatured polyvinyl alcohol having a hydrocarbon group containing 10 to 100 carbon atoms.
A method of alignment of discotic liquid crystal molecules, which comprises forming an optically anisotropic layer comprising discotic liquid crystal molecules on an orientation layer comprising a denatured polyvinyl alcohol having a hydrocarbon group containing 10 to 100 carbon atoms to align the discotic liquid crystal molecules at an average inclined angle in the range of 50° to 90°.
An optical compensatory sheet comprising a transparent substrate, an orientation layer and an optically anisotropic layer in order, said optically anisotropic layer comprising discotic liquid crystal molecules, wherein the orientation layer comprises a denatured polyvinyl alcohol having a hydrocarbon group containing 10 to 100 carbon atoms, said discotic liquid crystal molecules being aligned at an average inclined angle in the range of 50° to 90°.
A liquid crystal display comprising a liquid crystal cell of an STN mode, two polarizing elements arranged on each side of the liquid crystal cell and one or two optical compensatory sheets arranged between the liquid crystal cell and the polarizing elements, wherein the optical compensatory sheet comprises a transparent substrate, an orientation layer and an optically anisotropic layer in order, said transparent substrate being adjacent to the polarizing element, said optically anisotropic layer comprising discotic liquid crystal molecules, said orientation layer comprising a denatured polyvinyl alcohol having a hydrocarbon group containing 10 to 100 carbon atoms, and said discotic liquid crystal molecules being aligned at an average inclined angle in the range of 50° to 90°.
Dependencies are inferred from the claim text.