Patent ID: 8692960

Claim:
A liquid crystal display device that has a pixel, which includes red, green, blue and yellow subpixels, and that comprises a backlight, and a liquid crystal panel, wherein the liquid crystal panel includes a color filter layer that has red, green, blue and yellow color filters associated with the red, green, blue and yellow subpixels, respectively, and wherein the chromaticity of the yellow subpixel is outside of a triangle that is defined by connecting together the respective chromaticities of the red, green and blue subpixels, and wherein the respective aperture areas S R , S G , S B and S Y of the red, green, blue, and yellow subpixels and the respective transmittances T R , T G , T B and T Y of the red, green, blue, and yellow color filters satisfy the inequality T Y >[( S R +S G +S B +S Y )( T R +T G +T B )−3( S R ×T R +S G ×T G +S B ×T B )]/3 S Y .