LIQUID CRYSTAL ALIGNING AGENT FOR PHOTOALIGNMENT AND LIQUID CRYSTAL DISPLAY DEVICE UTILIZING THE SAME

摘要

A liquid crystal aligning agent for obtaining a liquid crystal alignment film excelling in not only liquid crystal alignment performance but also electrical properties through photoalignment procedure; and a liquid crystal display device making use of this liquid crystal aligning agent, which can resolve problems invited by rubbing treatment of liquid crystal alignment film, exhibiting high reliability and which can minimize display unevenness and exudation around sealing material. There is provided a liquid crystal aligning agent for photoalignment, characterized by containing at least one of a polyamic acid, the polyamic acid obtained by reacting a diamine component containing a diamine of the following formula (1) with a tetracarboxylic acid dianhydride component containing a tetracarboxylic acid dianhydride with alicyclic structure into a polymer, and a polyimide obtained from the polyamic acid. There is further provided a liquid crystal display device having a liquid crystal alignment film obtained from the above liquid crystal aligning agent through photoalignment procedure. (wherein two of R<1> to R<10> are primary amino, and each of the rest is a hydrogen atom or a monovalent organic group other than primary amino, provided that they may be identical with or different from each other).