Patent ID: 7990360

Claim:
A backlight assembly comprising: a plurality of first light-emitting chips for emitting first color light and connected in series to each other; a plurality of second light-emitting chips for emitting second color light and connected in series to each other; a plurality of third light-emitting chips for emitting third color light and connected in series to each other; a first variable resistance element having an electrical resistance that varies depending on its temperature; and a power control part configured to control a light amount output by the plurality of first light-emitting chips by pulse-width modulating a first current through the plurality of first light-emitting chips based upon a detected temperature of the plurality of first light-emitting chips, which is detected by detecting the resistance of the first variable resistance element, wherein the power control part comprises: a temperature detection part configured to detect the temperature of the plurality of first light-emitting chin and to output a temperature signal based on the detected temperature of the first light-emitting chips; and a dimming circuit part configured to generate a first pulse width modulation (PWM) dimming signal, a second PWM dimming signal and a third PWM dimming signal, based on the temperature signal and further based upon a received image data signal, for respectively controlling light amounts output by the plurality of first, second and third light-emitting chips.