Patent ID: 8570472

Claim:
An optical compensation film for a liquid crystal display device, comprising a coating layer with hybrid alignment in which the alignment of a nematic liquid crystal compound including a compound represented by Chemical Formula 1 varies gradually along the thickness direction from the surface of an aligning layer: [A] m -B-[A′] n [Chemical Formula 1] wherein m and n independently represent a natural number ranging from 1 to 12; A and A′ are the same or different and each represents a discotic type mesogen or rod-like mesogen, wherein A′ and A′ or A and A are linked to each other via direct bonding between the two mesogens or by way of a spacer; wherein A or A′ is a compound represented by Chemical Formula 2: wherein R 1 through R 4 independently represent (C1-C14)alkyl, (C1-C14)alkoxy, (C1-C14)alkylcarbonyl, (C6-C20)aryl, (C6-C20)arylcarbonyl, (C1-C14)alkoxycarbonyl, (C6-C20)aryloxycarbonyl, carbamoyl or sulfamoyl; wherein the alkyl, the alkyl at the alkylcarbonyl, the alkoxy, and the alkoxy at the alkoxycarbonyl of R 1 through R 4 may include a linear or branched, saturated or unsaturated bond, and the alkyl, aryl, alkanoyl, alkenyl, alkynoyl, aryloyl, alkoxycarbonyl, aryloxycarbonyl, carbamoyl or sulfamoyl of R 1 through R 4 may be further substituted with at least one substituent selected from the group consisting of halogen, cyano and hydroxyl; and B is a functional group maintaining a geometrically constant binding angle.