Patent ID: 8524116

Claim:
An optical compensatory sheet comprising an optically anisotropic layer comprising: at least one liquid crystal compound, at least one cellulose ester, and at least one polymer A comprising: at least one repeating unit derived from a monomer having a fluoro-aliphatic group, and at least one repeating unit represented by a formula (1a): wherein R 1a , R 2a and R 3a respectively represent a hydrogen atom or a substituent; La is a linking group selected from Linkage Group I shown below or a divalent group consisting of two or more selected from Linkage Group I shown below: (Linkage Group I) a single bond, —O—, —CO—, —NR 4a — (R 4a is a hydrogen atom, an alkyl group, an aryl group or an aralkyl group), —S—, —SO 2 —, —P(═O)(OR 5a )— (R 5a is an alkyl group, an aryl group or aralkyl group), an alkylene group and arylene group; and Q a is a carboxyl group (—COOH) or a salt thereof, a sulfo group (—SO 3 H) or a salt thereof or a phosphonoxy group {OP(═O)(OH) 2 } or a salt thereof, wherein the amount of the monomer containing a fluoro-aliphatic group is not less than 5 wt % with respect to the total amount of all monomers constituting the polymer A, wherein said at least one repeating unit derived from a monomer having a fluoro-aliphatic group is represented by formula (2a): where R 11a is a hydrogen or methyl; X a is oxygen (O), sulfur (S) or —N(R 12a )— where R 12a represents a hydrogen atom or a C 1-4 alkyl group; H f is hydrogen or fluorine; m is an integer from 1 to 6 and n is an integer from 2 to 4.