Patent ID: 8035117

Claim:
A solid state light emitting device, comprising: a light emitting diode (LED), including: a plurality of active layers, said active layers capable of emitting two or more different wavelengths of light in a wavelength range from green to ultraviolet (UV); a plurality of doped layers, each of said active layers sandwiched between a pair of oppositely doped layers, said oppositely doped layers causing said active layers to emit light at a predetermined wavelength in response to an electrical bias across said doped layers; and a doped substrate, said active layers and doped layers disposed successively on said substrate, wherein said substrate is doped by one or more rare earth or transition elements in separate color centers each comprising a doped body within said substrate, each of said color centers capable of absorbing at least some of said light from at least one of said active layers and re-emitting light at a different wavelength, said LED emitting a combination of light from said substrate and said active layers.