Patent ID: 7144607

Claim:
A liquid crystal display device comprising a liquid crystal alignment film formed from a liquid crystal alignment treating agent, the liquid crystal alignment treating agent comprising at least one polymer selected from the group consisting of a polyamic acid having the structure of the formula (I) and a polyimide having the structure of the formula (I), wherein Q is a single bond or a divalent organic group, and R 1 to R 4 represent aromatic groups, and R 1 to R 4 may be the same as, or different from, one another; and wherein the polyamic acid having the structure of the formula (I) or the polyimide having the structure of the formula (I) is a product obtained by a process which comprises reacting a tetracarboxylic acid dianhydride, a first diamine, and a diamine containing a diamine having the structure of the formula (I).