Gamut mapping and subpixel rendering systems and methods

A display system comprising a display panel substantially comprising a subpixel repeating group with a first color subpixel, a second color subpixel, a third color subpixel and a white subpixel, the display system further receiving input image data specified in a first color space and outputting image data specified in a second color space, the display system further comprising:

• a gamut mapping module configured to produce a first color value, a second color value, a third color value and a white value based on a first color input value, a second color input value, a third color input value and a plurality of parameters for the subpixel repeating group,
• wherein the white value is a maximum value of a first value, a second value, a third value and 0, the first value obtained from a function of a difference between a first parameter and a maximum value of the first to third color input values, the second value obtained from a function of summation of the first to third color input values, which are independently scaled, the third value obtained from a function of a second parameter multiplied by minimum value of the first to third color input values,
• wherein the first color value is obtained from a difference between the first color input value and a function of the white value multiplied by a third parameter,
• wherein the second color value is obtained from a difference between the second color input value and a function of the white value multiplied by the third parameter,
• wherein the third color value is obtained from a difference between the third color input value and a function of the white value multiplied by the third parameter.