Polyimide film from pyromellitic dianhydride and a bis (4- aminophenoxy) aromatic compound as an alignment layer for liquid crystal displays

摘要

A polyimide alignment film based on pyromellitic dianhydride and a bis(4-aminophenoxy) aromatic compound, such as 1,3-bis(4- aminophenoxy) benzene or 1,4-bis(4-aminophenoxy)benzene, providing low tilt angles of from 1 to 2 degrees when used in liquid crystal displays.