Patent ID: 7976200
Filing Date: 2011-07-12
Classification: F21K,G03B,H01L,H04N

Abstract:
1. An optical projection device comprising: a plurality of light-emitting diode chips including light-emitting diode chips of a first color; and light-emitting diode chips of a second color, which is different from the first color; and at least one optical element with a light input surface which is associated with at least one light-emitting diode chip, a light decoupling surface of the light-emitting diode chip being optically connected, adapted to a refraction index of the optical element, to the light input surface of the associated optical element; wherein a majority of the light-emitting diode chips of the first color each are optically connected, adapted to the refraction index, to the light input surface of an associated optical element; and wherein a majority of the light-emitting diode chips of the second color each are optically connected, not adapted to the refraction index, with the light input surface of an associated optical element.