Patent ID: 7612756

Claim:
An apparatus for driving a light source in an image display device in which a gate signal of a gate line includes a gate-on voltage and a gate-off voltage to control activation of pixels of the image display device, the apparatus comprising: a signal controller that generates a synchronization signal in response to input control signals externally provided, wherein the signal controller generates a gate control signal to control timing of generation of the gate-on voltage, and the synchronization signal generated from the signal controller has a phase difference of 90° with respect to the gate control signal; and an inverter that generates a driving signal synchronized with the synchronization signal, the driving signal being provided to the light source, wherein the driving signal includes a wave signal of which a rising slope interval and a falling slope interval are substantially equal to each other during a gate-on voltage interval in which a data voltage of a data line in the image display device is charged in corresponding one of the pixels.