Liquid crystal aligning agent and liquid crystal display element coated with boa substrate or BCS

摘要

A liquid crystal display device having a boa substrate or a BCS substrate having a good display quality obtained by using a boa substrate or a liquid crystal aligning liquid crystal for a substrate coated with a BCS and a liquid crystal alignment agent is providedIn the structure other than two amino groups, a polyimide precursor obtained by reacting a diamine component containing a diamine containing nitrogen or carboxylic acid groups and a tetrasarboxylic dianhydride component, and fewer than a group consisting of polyimide impregnated with the polyimide precursor Boa substrate containing one type of polymer or liquid crystal aligning liquid crystal for substrate coating with BCS, and liquid crystal display device having a boa substrate or substrate with BCS formed thereon