Patent ID: 8368851
Filing Date: 2013-02-05
Classification: G02B,G02F

Abstract:
1. A color filter for a liquid crystal display device, which exhibits a color filter contrast of 9000 or more and comprises a transparent substrate, and a plurality of color layers exhibiting different color from each other and formed on the transparent substrate, wherein each of the color layers is a cured film of a color resin composition containing a polymer composition obtained through a copolymerization of styrene and an unsaturated carboxylic acid-containing monomer, a content of the styrene in the polymer composition being confined to a range of not less than 75 mol. % and less than 95 mol. %, and a retardation in a thickness direction “Rth” of each of these color layers, which is represented by the following expression, is confined within a range of 0 nm to −10 nm: wherein Nx is a refractive index in x-direction in a plane of a color pixel layer; Ny is a refractive index in y-direction in a plane of the color pixel layer; and Nz is a refractive index in a thickness direction of the color pixel layer, x direction is defined as a lagging axis represented by Nx≧Ny; and d is a thickness (nm) of the color pixel layer.