Patent ID: 8098028

Claim:
A control circuit for control of light-emitting diodes, comprising: a first LED string with at least one LED; and a first supply device for supply of current to the first LED string, which has a first current source to supply a first current, a second current source to supply a second current, and a control input for feed of a first control signal and that is furnished for optional delivery of a first supply current or a second supply current in dependence on the first control signal so that the first and second supply currents are non-zero, the first supply device further having a conversion device, through which a level of the first and second supply currents is establishable dependent on a relevant digital control word, and which is arranged to generate relevant control words for the first and second supply currents dependent on the first control signal; wherein, in the first supply device, the non-zero first supply current results from the sum of the first and second currents, and the non-zero second supply current results from the second current.