Patent ID: 6756089
Filing Date: 2004-06-29
Classification: C09K,G02F

Abstract:
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 for applying to said liquid crystal layer an electric field substantially parallel to the substrate plane and a plural number of active elements being formed on one of said pair of substrates; and a pair of alignment layers, a respective alignment layer being disposed between said liquid crystal layer and a respective one of said pair of substrates, wherein each of said pair of alignment layers is a photo-reactive material layer, and said photo-reactive material layer is a photo-reactive alignment layer which has been subjected to linearly polarized light irradiation to selectively derive a photochemical reaction; wherein a tilt angle of liquid crystal molecules on the alignment layer surface of the substrate is 3Â° or less; and wherein said photo-reactive material layer is made of an organic polymer prepared by dehydration ring-closure of at least one of a polymer and an oligomer-amic acid comprising a single-ring rigid diamine as amine moiety and an aliphatic tetracarboxylic dianhydride or an alicyclic tetracarboxylic dianhydride as acid moiety, and wherein the weight-average molecular weight of one of said polymer and oligomer is 2,000-90,000.