A liquid crystal display device having a polyimide-based varnish, an alignment film, and the alignment film for forming an alignment film for liquid crystal display devices

摘要

A polyimide varnish for forming an alignment film of an LCD(Liquid Crystal Display), an alignment film, and an LCD having the alignment film are provided to produce an LCD having excellent black display characteristic. A polyimide varnish forms an alignment film of an LCD, which has an alignment index of larger than 1.3 after liquid crystal processing. The LCD is an in-plane mode switching LCD. The alignment film is rubbed under the condition of 5 to 250 mm/sec of stage movement speed and 500 to 2000 rpm of roller rotation speed.