Patent ID: 9345076
Filing Date: 2016-05-17
CPC Classification: B60Q,H05B,Y02B

Claim Text:
1. A multi-color light unit comprising a plurality of lighting circuits, with each lighting circuit being coupled to a joint power terminal, the plurality of lighting circuits comprising: a first lighting circuit, comprising a first current source, coupled to the joint power terminal, a plurality of first LED's, in operation emitting light of a first color, and a plurality of voltage drop diodes, in operation not emitting light, the plurality of first LED's and the plurality of voltage drop diodes being coupled to the first current source, and a second lighting circuit, comprising a second current source, coupled to the joint power terminal, and a plurality of second LED's, in operation emitting light of a second color, the plurality of second LED's being coupled to the second current source, wherein each of the plurality of first LED's has a lower forward voltage drop than each of the plurality of second LED's and wherein the number of voltage drop diodes in the first lighting circuit is chosen in such a way that the joint forward voltage drop of the first LED's and the voltage drop diodes in the first lighting circuit in operation is between 80% and 120% of the joint forward voltage drop of the second LED's in the second lighting circuit in operation, wherein the first current source and the second current source are of equal design.