Patent ID: 7857991

Claim:
A dichroic dye composition comprising: at least one dichroic dye selected from Group (I); at least one dichroic dye selected from Group (II); and at least one dichroic dye selected from Group (III), wherein, Group (I) is a dichroic azo dye represented by the following general formula [I-1]: (each of R 1 and R 2 is an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkoxy-alkyl group having 2 to 12 carbon atoms, and a cycloalkyl group or a phenyl group which may be substituted by these alkyl group, alkoxy group, or alkoxy-alkyl group, each of Ring A and Ring B is a 1,4-cyclohexanediyl group, or a 1,4-phenylene group, Group (II) is a dichroic azo dye represented by the following general formula [II-1]: R 3 is an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkoxy-alkyl group having 2 to 12 carbon atoms, a cycloalkyl group or a phenyl group which may be substituted by the alkyl group, the alkoxy group, and the alkoxy-alkyl group, R 4 is a hydrogen atom, a methyl group, a methoxy group, a halogen atom, or a fluoromethyl group, Ring C is a 1,4-cyclohexanediyl group, or a 1,4-phenylene group, Ring D is a 1,4-phenylene group, or a 1,4-naphthylene group, Group (III) is a dichroic azo dye represented by the following general formula [III-1]; R 5 is an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkoxy-alkyl group having 2 to 12 carbon atoms, a cycloalkyl group or a phenyl group which may be substituted by the alkyl group, the alkoxy group, and the alkoxy-alkyl group, R 6 is a hydrogen atom, or an alkyl group having 1 to 10 carbon atoms, and Ring E is a 1,4-phenylene group, or a 1,4-naphthylene group.