abstract |
According to the present invention, a photo-alignment layer is prepared by using a photo-alignment layer composition comprising poly(amic acid) prepared by using diamine represented by chemical formula 1. A problem of afterimage in a photo-alignment layer, caused by using alternating current for operating the photo-alignment layer can be minimized, and a photo-alignment layer having enhanced physical strength can be obtained. In chemical formula 1, Z is a divalent organic group including an aromatic group. |