Patent ID: 8330705

Claim:
A method of driving a light source, the method comprising: driving a plurality of light source strings in response to a plurality of driving signals, when a light source module having the plurality of light source strings connected in parallel with each other receives a driving voltage; detecting a detection voltage from channel input terminals of a multichannel current control part, wherein the multichannel current control part controls a resistance difference of the plurality of light source strings based on the plurality of driving signals; and controlling a level of the driving voltage via adjusting a current applied to a feedback terminal of a driving voltage generating part, wherein the driving voltage generating part generates the driving voltage; wherein controlling the level of the driving voltage comprises: decreasing a level of a feedback voltage of the feedback terminal by connecting the feedback terminal to ground when the detection voltage is less than a first reference voltage; and increasing the level of the feedback voltage of the feedback terminal by at least partially flowing a current to the feedback terminal when the detection voltage is greater than the feedback voltage.