Patent ID: 7893944

Claim:
In a display system comprising a display panel substantially comprising a subpixel repeating group with at least four primary colored subpixels, said display system further receiving input image data specified in a first color space and outputting image data specified in a second color space, said display system further comprising: a gamut mapping module configured to map said image data specified in said first color space to image data specified in said second color space; said gamut mapping module clamping out-of-gamut colors to black; and a calculation unit configured to calculate at least a first primary color value at least partially according to a clamping of the out-of-gamut colors to luminance; wherein the first color space comprises at least three colors; and wherein the second color space comprises at least four colors, the four colors including at least one color that is not included in the colors of the first color space, and that is calculated at least partially according to a luminance of the input image data.