| abstract |
The present invention is a compound selected from the group consisting of polyamic acid represented by the following formula (1), polyimide polymer represented by the formula (2), and combinations thereof; And it provides a liquid crystal photo-alignment agent comprising a polyimide photopolymer represented by the formula (3). n [Formula 1] n n n n [Formula 2] n n n n [Formula 3] n n n n The definitions for R 1 to R 6 are as described in the detailed description of the specification. The liquid crystal photoalignment agent has a long lifetime, stable maintenance of the pretilt angle, improved afterimage characteristics, and excellent liquid crystal alignment and chemical resistance. n n Liquid crystal photoalignment film, liquid crystal photoalignment agent, polyamic acid, polyimide, photoalignment agent, afterimage, pretilt angle, voltage retention, orientation stability, photoalignment |