Patent ID: 6864627

Claim:
A light emission device comprising: a plurality of light emitting diodes emitting lights at different wavelengths and stacked in an order such that at least one of said light emitting diodes is disposed closer to a light extracting portion of said light emission device; and at least one of said light emitting diodes transmits light through at least one other of said light emitting diodes, at least one of said light emitting diodes being of GaN type, wherein said plurality of light emitting diodes includes, a red diode having a peak wavelength emission in a red color visible light, a blue diode having a peak wavelength emission in a blue color visible light, said blue diode being of GaN type and a green diode having a peak wavelength emission in a green color visible light; said light emitting diodes are stacked in an order such that said green diode is stacked over said red diode; and said red diode is stacked over said blue diode and light emitted from said red diode is transmitted through said green diode.