Patent ID: 9151990
Filing Date: 2015-10-06
Classification: C09K,G02F

Abstract:
1. A liquid crystal display device comprising: a first substrate; a second substrate disposed to face the first substrate; a liquid crystal layer interposed between the first and second substrates; and an alignment layer disposed on an inner surface of at least one of the first and second substrates and formed of an alignment composition comprising a chemical compound represented by Chemical Formula 1, wherein R is an aromatic-based chemical compound, wherein the alignment composition further comprises a maleimide-based compound containing an ether group, wherein Chemical Formula 1 is decomposed to a cyclobutane imide ring-based compound and a byproduct in a process of irradiating light in a nitrogen atmosphere, wherein a residual image generated due to the oxidation of the carbonyl group is prevented, wherein the cyclobutane imide ring-based compound has anisotropy for alignment of liquid crystal, wherein the byproduct has a maleimide group and an aromatic compound, wherein the byproduct has no influence on the alignment of liquid crystal, wherein the byproduct is crosslinked by a thermal treatment in a nitrogen atmosphere at a temperature of about 100° C. to 300° C. to prevent recombination of the byproduct with the cyclobutane imide ring-based compound, and wherein a glass transition temperature of the alignment layer remains substantially constant within the range of 300° C. and 400° C. when the range of the UV dosage energy is 0.8 J/cm