Study of liquid crystal high pretilt angle on blend alignment layer

Abstract

Wide range of pretilt angle was generated by rubbing treatment on an alignment layer which was consisted of a polyimide for homeotropic alignment and a polyimide for planar alignment. It was found that the surface energy decreased with increasing the pretilt angle. UV photo alignment technique was also employed with blend polyimide alignment layer to generate variable pretilt angle. The mechanism of the liquid crystal alignment on blend alignment layer was investigated.