Patent ID: 7763181
Filing Date: 2010-07-27
Classification: C09K,G02B,G02F

Abstract:
1. An optical compensation film comprising at least one optically anisotropic layer formed of a composition comprising two or more species of liquid crystalline compounds which differ in wavelength-dependence from each other, wherein a ratio α2, which is a ratio of a retardation value at 400 nm to a retardation value at 550 nm value, of said optically anisotropic layer is smaller than 1.2, wherein said optically anisotropic layer is a layer formed of a composition comprising at least one species of liquid crystalline compounds represented by a formula (DI) or a formula (I) below: Formula (DI) where, in the formula (DI), Y Formula (DI-A) (where, in the formula (DI-A), A 11 , A 12 , A 13 , A 14 , A 15 and A 16 independently represent methine or nitrogen atom, X 1 represents an oxygen atom, sulfur atom, methylene or imino, L 11 represents —O—, —O—CO—, —CO—O—, —O—CO—O—, —S—, —NH—, —SO 2 —, —CH 2 —, —CH═CH— or —C≡C—, L 12 represents a divalent linking group selected from the group consisting of —O—, —S—, —C(═O)—, SO 2 —, —NH——CH 2 —, —CH═CH— and —C≡C— and any combinations thereof, wherein any hydrogen atom, if contained in the above-described groups, may be substituted by a substituent, Q 11 independently represents a polymerizable group or hydrogen atom); Formula (DI-B) (where, in the formula (DI-B), A 21 , A 22 , A 23 , A 24 , A 25 and A 26 independently represent methine or nitrogen atom, X 2 represents an oxygen atom, sulfur atom, methylene or imino, L 21 represents —O—, —O—CO—, —CO—O—, —O—CO—O—, —S—, —NH—, —SO 2 —, —CH 2 , —CH═CH— or —C≡C—, L 22 represents a divalent linking group selected from the group consisting of —O—, —S—, —C(═O)—, —SO 2 —, —NH—, —CH 2 —, —CH═CH— and —C≡C— and any combinations thereof, wherein any hydrogen atom, if contained in the above-described groups, may be substituted by a substituent, Q 21 independently represents a polymerizable group or hydrogen atom); Formula (DI-C) (where, in the formula (DI-C), A 31 , A 32 , A 33 , A 34 , A 35 and A 36 independently represent methine or nitrogen atom, X 3 represents an oxygen atom, sulfur atom, methylene or imino, L 31 represents —O—, —O—CO—, —CO—O—, —O—CO—O—, —S—, —NH—, —SO 2 —, —CH 2 , —CH═CH— or —C≡C—, L 32 represents a divalent linking group selected from the group consisting of —O—, —S—, —C(═O)—, —SO 2 —, —NH—, —CH 2 —, —CH═CH— and —C≡C— and any combinations thereof, wherein any hydrogen atom, if contained in the above-described groups, may be substituted by a substitutive group, Q 31 independently represents a polymerizable group or hydrogen atom); where, in the formula (I), D represents a triphenylene, n1 represents an integer from 3 to 6, R