Patent ID: 7615260

Claim:
An active-matrix liquid crystal display device comprising: a pair of substrates at least one of which is transparent; a liquid crystal layer disposed between said pair of substrates; a group of electrodes formed on one of said pair of substrates and configured so as to apply to said liquid crystal layer an electric field substantially parallel to the substrate plane, and a plural number of active elements being formed on said one of said pair of substrates; and an alignment layer disposed between said liquid crystal layer and at least one of said pair of substrates; wherein said alignment layer is made from polyamic acid obtained by reacting a diamine with an acid anhydride, and said acid anhydride is at least one member selected from the group consisting of 1,2,3,4-cyclopentanetetracarboxylic acid dianhydride, 1,2,3,4-butanetetracarboxylic acid dianhydride, and 1,2,3,4-cyclobutanetetracarboxylic acid dianhydride; wherein a tilt angle of liquid crystal molecules of said liquid crystal layer on a surface of said alignment layer is no greater than 3°, and wherein said alignment layer is a photo-reactive material layer.