LIQUID CRYSTAL ALIGNING AGENT FOR OPTICAL ALIGNMENT, FORMATION METHOD OF LIQUID CRYSTAL ALIGNMENT FILM, LIQUID CRYSTAL ALIGNMENT FILM AND LIQUID CRYSTAL DISPLAY ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide: a liquid crystal aligning agent for optical alignment allowing formation of a liquid crystal alignment film having excellent liquid crystal alignment properties by an optical alignment method; a formation method of a liquid crystal alignment film and a liquid crystal alignment film using such a liquid crystal aligning agent for optical alignment; and further a liquid crystal display element comprising the liquid crystal alignment film and also being excellent in various performance such as electrical characteristics and afterimage characteristics in addition to liquid crystal alignment properties.SOLUTION: A liquid crystal aligning agent for optical alignment contains [A] a polymer having a structural unit (I) comprising a structure represented by the formula (1). In addition, the [A] polymer is preferably polyamic acid or polyimide.