Patent ID: 8624941

Claim:
An apparatus for generating a target color comprising: a first, a second, a third, and at least a fourth light source, wherein each light source has light source chromaticity coordinates in the CIE color space unique to each source; a processor configured to: calculate a gamut area in the CIE color space defined by the light source chromaticity coordinates, wherein each light source provides a vertex of the gamut area, the gamut area includes sub gamut areas formed using vertices of the gamut area, and each of the sub gamut areas overlap with at least one of other of the sub gamut areas; determine which of the overlapping sub gamut areas contain the CIE color space chromaticity coordinates of the target color, use square matrices to perform a color mixing algorithm to calculate a solution for each of the overlapping sub gamut areas that contain the CIE color space chromaticity coordinates of the target color; use the calculated solution for each of the overlapping sub gamut areas that contain the coordinates of the target color to calculate proportional values of each primary necessary to generate the target light for each valid sub gamut area; and provide an output control signal for providing the target color using the calculated proportional values.