This invention relates to a color controlled light source comprising a plurality of colored light elements; a detector for detecting the light output of the light source and generating a detection signal; and a color control unit for generating driving signals to said light elements on the basis of said...http://www.google.de/patents/US8158916?utm_source=gb-gplus-sharePatent US8158916 - Color controlled light source and a method for controlling color generation in a light source
