Patent ID: 8294739

Claim:
A signal conversion circuit for use in a multiprimary liquid crystal display device which performs display by using four or more primary colors, comprising: a signal conversion circuit configured to convert an input video signal to a multiprimary signal corresponding to four or more primary colors, wherein when generating a multiprimary signal for a pixel of the multiprimary liquid crystal display device to display dark skin according to the Macbeth chart, the signal conversion circuit applies a conversion to the video signal so that a color difference Δu′v′=((u′−u 60 ′) 2 +(v′−v 60 ′) 2 ) is 0.03 or less, the color difference Δu′v′ being defined by CIE1976 chromaticity coordinates (u′, v′) representing a chromaticity when the pixel is viewed from a frontal direction and CIE1976 chromaticity coordinates (u 60 ′, v 60 ′) representing a chromaticity when the pixel is viewed from a 60° oblique direction.