Patent ID: 8057700

Claim:
A liquid crystal photo-alignment agent comprising a polyamic acid copolymer including a repeating unit having the following Formula 1 and a repeating unit having the following Formula 2, a polyimide copolymer including a repeating unit having the following Formula 3 and a repeating unit having the following Formula 4, or a combination thereof: wherein, in the above Formulae 1 to 4, R 1 , R 3 , R 5 , and R 7 are each independently a quadrivalent organic group derived from an acid dianhydride comprising an aliphatic cyclic acid dianhydride or an aromatic acid dianhydride, R 2 and R 6 are each independently divalent organic groups derived from an aromatic diamine, wherein the aromatic diamine comprises a functional diamine and an aromatic diamine excluding the functional diamine, and R 4 and R 8 are each independently divalent organic groups derived from a photodiamine comprising a coumarin-based photodiamine, chalcone-based photodiamine, or cinnamate-based photodiamine.