Patent ID: 7220467

Claim:
A photo-alignment material having a photo-reactive ethenyl group in a polymer main chain, wherein the polymer is according to chemical formula 1: wherein subscripts a, b, and c denote a component ratio of respective monomers, wherein 0<a≦1, 0≦b<1, and 0≦c<1, wherein components B and C are monomeres, and wherein component A is a monomer unit including the photo-reactive ethenyl group selected from structure groups designated in chemical formula 2, substituted-structure groups of chemical formula 2 having a halogen, a cyano, a nitro, an amino group, and other substituted-structure groups with an alkyl, a haloalkyl, and a cyanoalkyl group having 1 to 10 carbons, or an aryl, a haloaryl, a haloalkyl aryl, a nitroaryl, and a cyanoaryl group having 3 to 8 carbons;