Patent ID: 8467018
Filing Date: 2013-06-18
Classification: G02B,G02F

Abstract:
1. A color filter for a liquid crystal display device, the liquid crystal display device having a liquid crystal cell provided with the color filter, a pair of polarizing plates arranged on both outside surfaces of the liquid crystal cell, and an optical compensation layer disposed inside of each polarizing plate, wherein, when a chromaticity (u, v) represented in CIE1960 color system is measured in a black state of the liquid crystal display device, a color difference Δuv given by equation (1) described below is 0.02 or less in an range of 0<θ≦60: where (u(⊥), v(⊥)) is chromaticity as viewed from a vertical direction and (u(θ), v(θ)) is chromaticity as viewed from a direction inclined at an angle of θ degrees with a direction of a normal line of a display surface, the color filter comprising: color pixels including at least a red pixel, a green pixel and a blue pixel, wherein a retardation value Rth (R) in a thickness direction of the red pixel, a retardation value Rth (G) in a thickness direction of the green pixel and a retardation value Rth (B) in a thickness direction of the blue pixel satisfy following equations (2) and (3): where Rth (R), Rth (G) and Rth (B) are a product of a value obtained by subtracting a refractive index in the thickness direction from an average of an in-plane refractive index of each pixel and a thickness (nm) of the pixel,