Patent ID: 8684540

Claim:
An optical projection apparatus comprising: a first light source, a second light source, and an imaging element located to be illuminated by the first light source and the second light source during operation, wherein the first light source comprises a third light-emitting diode chip that emits red light during operation, wherein the second light source comprises a first light-emitting diode chip that emits green light during operation and a second light-emitting diode chip that emits blue light during operation, wherein the second light-emitting diode chip is arranged on the first light-emitting diode chip at a radiation exit area of the first light-emitting diode chip, such that electromagnetic radiation generated in the first light-emitting diode chip during operation passes through the second light-emitting diode chip, and wherein the first light source is provided for emitting red light and the second light source is provided for emitting green light, blue light and/or mixed light composed of blue and green light.