| abstract |
A dichroic dye composition which shows high dichroic ratio and well alignment is provided. The dichroic dye composition contains at least one dichroic dye as shown in the formula (I). The dichroic dye as shown in the formula (I) has liquid crystal property. In formula (I): Ar1 to Ar4 represent aromatic hydrocarbyl group, aromatic heterocycle group and cyclehexane cycle group which could have substituents, respectively; L1 and L2 represent azo group, ester group, imide group or vinylene group respectively, wherein L1 and L2 do not represent azo group at the same time. Ar1-N=N-Ar2-L1-Ar3-L2-Ar4 |