Patent ID: 8120288
Filing Date: 2012-02-21
Classification: H05B,Y02B

Abstract:
1. A light emitting diode (LED) driving circuit, for driving a plurality of load units, each of the load units including at least an LED, the LED driving circuit comprises: a voltage adjusting unit, for outputting a driving voltage to a first end of each of the load units; a switch unit, coupled between a current source and a second end of each of the load units, the switch unit selectively coupling one of the load units to the current source; and a control unit, coupled to the voltage adjusting unit and the switch unit, the voltage adjusting unit adjusting the driving voltage according to a first control signal generated by the control unit, the switch unit selectively coupling the one of the load units to the current source according to a second control signal generated by the control unit; wherein when the switch unit couples a first load unit of the load units to the current source, the voltage adjusting unit adjusts a voltage level of the driving voltage so that the voltage level of the driving voltage corresponds to the first load unit.