Patent ID: 8633952

Claim:
A display system comprising: an input module for receiving input image data including color values for three colors specified in a first color space; a calculation unit for calculating color values for four different colors specified in a second color space, wherein the color values for the four different colors is calculated from the input image data; a gamut clamping unit for clamping the input image data that is out-of-gamut for the second color space to select color values in the second color space; and a subpixel rendering module for processing the clamped image data to convert a display format of the clamped image data to data suitable for the output display format, wherein the gamut clamping unit includes: a clamp-to-black module generating a black-clamped value of at least one of the color values, a clamp-to-luma module generating a luminance-clamped value of at least one of the color values, and a clamp-to-diagonal module generating a weight average of the black-clamped value.