Patent ID: 7683861
Filing Date: 2010-03-23
Classification: H05B

Abstract:
1. A driving arrangement for driving a lighting source comprising a plurality of light emitting diodes, the driving arrangement comprising: a first power supply line (Vcc) and a set of signal lines for carrying information for said plurality of light emitting diodes, the driving arrangement further including: a second power supply line (GND) to provide jointly with said first power supply line (Vcc) a two-wire power supply, and a switching block to generate switching signals to provide driving information for said plurality of light emitting diodes via said set of signal lines wherein the driving arrangement is configured to drive an active lighting source in such a way that power is supplied to the active lighting source via the first and second power supply lines and driving information is provided on the signal lines, and wherein the driving arrangement is further configured to drive a passive lighting source in such a way that switching signals to drive the light emitting diodes of the passive lighting source are supplied via the first power line and the signal lines and that the second power supply line is not used to drive the passive lighting source.