Patent ID: 8906473

Claim:
A liquid crystal display device, comprising: a pair of substrates at least one of which is transparent; a liquid crystal layer disposed between the pair of substrates; an electrode group formed on one substrate of the pair of substrates, for applying an electric field to the liquid crystal layer, the electric field having a component parallel to the one substrate; a plurality of active elements connected to the electrode group; and a liquid crystal alignment film disposed on at least one substrate of the pair of substrates, wherein an interface tilt angle between the liquid crystal layer and the liquid crystal alignment film is set to 1 degree or less; and wherein the liquid crystal alignment film, which is formed by a photo-alignment process, contains polyimide formed using at least one kind of tetracarboxylic acid dianhydride selected from a compound group A represented by the following Chemical Formulae (201), (6) and (7): where R 1 s each independently represent hydrogen, an alkyl group having a carbon number of 3 or less, or a dialkylamino group, and at least one R 1 represents a dialkylamino group, where S represents —(CH 2 ) n —, and n represents an integer of 1 to 10.