A method of fabricating a light emitting diode (LED) device producing visible light includes growing layers of an LED emitting blue light to form a blue LED; growing layers of an LED emitting green light to form a green LED; growing layers of an LED emitting red light to form a red LED; and uniting...http://www.google.se/patents/US5739552?utm_source=gb-gplus-sharePatent US5739552 - Semiconductor light emitting diode producing visible light
