Patent ID: 6569502
Filing Date: 2003-05-27
Classification: C09K,G02F

Abstract:
An optical compensatory sheet comprising a transparent substrate, an orientation layer and an optically anisotropic layer in consecutive order, said optically anisotropic layer comprising discotic liquid crystal molecules, wherein the orientation layer comprises a polymer having a hydrocarbon side chain containing 10 or more carbon atoms wherein said polymer has a steroid structure in its side chain or its main chain, wherein said discotic liquid crystal molecules are aligned at an average inclined angle in the range of 50Â° to 90Â°, said incline angle being uniform, and said discotic liquid crystal molecules being twisted at an average twist angle in the range of 90Â° to 360Â°, the average inclined angle being an average of angles between discotic planes of said discotic liquid crystal molecules and a surface of said transparent substrate or a surface of said orientation layer.