Patent ID: 9560702
Date: 2017-01-31
CPC Classifications: H05B,Y02B

Claim:
1. A light source module comprising: at least one LED cascade with a plurality of LEDs connected in series; a supply line for coupling to a current source, wherein at the input side the LED cascade is coupled to the supply line; and a ground line for coupling to a reference potential; wherein the light source module further comprises: a communications line for coupling to a control device for the current to be provided by the current source; a thermal derating unit which is coupled between a first voltage source and the communications line and comprises a temperature-sensitive element, wherein the thermal derating unit is designed to apply a temperature dependent current component determined in dependence on the temperature-sensitive element, to the communications line; at least one current measurement resistor, which, forming a coupling point, is connected in series between the at least one LED cascade and the reference potential, wherein the conductance of the current measurement resistor is proportional to the current requirement of the LED cascade; and at least one coupling resistor, which is coupled between the coupling point and the communications line.