Patent ID: 8035310

Claim:
A circuit for driving light source, adapted for driving a plurality of serially-connected light sources, comprising: a driving module, for driving the light sources; a plurality of first switches, each of the first switches coupled to both ends of one of the corresponding light sources; a detecting unit, coupled to the driving module, for detecting a working parameter of the light sources, so as to provide a detection result; and a control unit, coupled to the detecting unit, for controlling operations of the plurality of first switches according to the detection result, wherein when at least one of the light sources is failed, the detection unit provides the detection result without having the working parameter to the control unit, and then the control unit controls ON/OFF state of the each of the first switches to find out the failed light source, then turn on a first switch of the plurality of first switches corresponding to the failed light source and turn off remaining first switches of the plurality of first switches corresponding to the normal light sources to thereby maintain the lighting-up of the serially-connected light sources.