Patent ID: 7420632
Filing Date: 2008-09-02
Classification: G02F

Abstract:
1. A color filter comprising red, green and blue color filter segments, wherein when chromaticity coordinates (x, y) in a chromaticity diagram of XYZ color specification system are measured with the color filter being sandwiched between two polarizers, a chromaticity (x p , y p ) of parallel-transmitted light and a chromaticity (x p , y c ) of orthogonal-transmitted light satisfy the following formula (1): wherein the chromaticity (x c , y c ) of the orthogonal—transmitted light is within a region on a xy plane of a chromaticity diagram of XYZ color specification system, which region is defined by a first straight line connecting a chromaticity a (0.180, 0.180) with a chromaticity b (0.270, 0.180), a second straight line connecting the chromaticity b with a chromaticity c (0.320, 0.250), a third straight line connecting the chromaticity c with a chromaticity d (0.380, 0.280), a fourth straight line connecting the chromaticity d with a chromaticity e (0.400, 0.430), a fifth straight line connecting the chromaticity e with a chromaticity f (0.300, 0.350), and a sixth straight line connecting the chromaticity f and the chromaticity a.