| abstract |
A liquid crystal aligning agent containing at least one polymer of a polyimide precursor having a side chain represented by the following formula [1] and a polyimide, and used for a liquid crystal display obtained by the following method Device: Use a liquid crystal material obtained by mixing a polymerizable compound that is polymerized by heat or ultraviolet radiation in liquid crystal, and polymerize the polymerizable compound while applying a voltage to the liquid crystal layer to obtain a polymer, and use this polymer to control the drive The alignment direction of the liquid crystal at the time; [Chem. 1] In formula [1], X 1 and X 3 are selected from single bonds, -(CH 2 ) a - (a is an integer of 1 to 10), -O-, -NH-, -CONH-, -NHCO-, A divalent organic group such as -CH 2 O-, -COO-, -OCO-, X 2 is a divalent organic group selected from a single bond or -(CH 2 ) b - (b is an integer of 1 to 10) Group, X 4 represents a divalent cyclic group selected from a benzene ring, a cyclohexyl ring or a heterocyclic ring, or a divalent organic group with a carbon number of 12 to 25 having a steroid skeleton, and X 5 represents a divalent organic group selected from a benzene ring, a cyclohexyl ring, or a heterocyclic ring. A divalent cyclic group of a cyclohexyl ring or a heterocycle, n is an integer of 0 to 4, and X 6 is an alkyl group having 1 to 18 carbon atoms or a hydrogen atom. |