Patent ID: 8906474
Filing Date: 2014-12-09
Classification: C08G,C08L,C09K,G02F

Abstract:
1. A liquid crystal display device comprising: a first substrate and a second substrate, at least one of which is transparent; a liquid crystal layer disposed between the first substrate and the second substrate; a group of electrodes for applying an electric field to the liquid crystal layer, which is formed on at least one of the first substrate and the second substrate; a plurality of active elements connected to the group of electrodes; and an alignment film disposed on at least one of the first substrate and the second substrate, wherein the alignment film contains a polyimide and a precursor of the polyimide, each of which is formed from a diamine and an acid anhydride, the diamine contains a first diamine having at least one acidic group and a second diamine having at least one nitrogen atom-containing basic functional group other than two amino groups, the second diamine is represented by the following chemical formula (2): H in a case where the second diamine has an annulation in the molecule, the annulation is a benzene ring structure, and wherein the second diamine comprises at least one of the compounds represented by the following chemical formulae (B-7), (B-30) and (B-31): in which each n independently represents an integer of 0 to 8, and each R independently represents an alkyl group having 1 to 3 carbon atoms.