US Patent 8007125: Method for changeover between mixed light colors

1. A method of operating a lighting unit having light sources of different color emissions, where a color control loop controls changeover between mixed light color whose color loci are specified in a color system, the method comprising:
storing, in memory, a plurality of predetermined selectable paths respectively defining a course of successive color loci in the color system, each path running from an initial color locus to a target color locus while avoiding undesired color locus regions;