Patent ID: 8248398

Claim:
A device for driving a liquid crystal display device comprising: a liquid crystal display panel having a plurality of pixel regions; gate and data drivers for driving gate and data lines of the liquid crystal display panel; a timing controller for controlling the data and gate drivers; a power source unit for transforming an external power into a rated voltage level required for driving the liquid crystal display device and forwarding the power; and a driving voltage generating unit for adjusting a voltage level of the power transformed thus in conformity with an environmental temperature to generate a positive driving voltage and using the driving voltage for generating a plurality of driving voltages required for driving units, including the liquid crystal panel, the gate and data drivers, wherein the driving voltage generating unit includes a power IC for adjusting a voltage level of the power from the power source unit according to a feed back voltage received at a feedback terminal for generating and forwarding the positive driving voltage, a feedback voltage adjusting unit for generating the feedback voltage having a level transformed in conformity with variation of the environmental temperature by using the positive driving voltage from the power IC, and supplying the feedback voltage generated thus to the feedback terminal of the power IC, wherein the feedback voltage adjusting unit is connected to the output terminal of the positive polarity driving voltage of the power IC in parallel, and has a first resistor and a thermistor connected in parallel and arranged between a second resistor and the third resistor connected in series, and a voltage divided between the first resistor and the thermistor connected in parallel and the third resistor connected in series is forwarded as the feedback voltage, wherein the first resistor connected in parallel to the thermistor is reducing a width of variation of the resistance of the thermistor, wherein the capacities of the first to third resistor and the thermistor set different from one another according to a rated voltage level of the liquid crystal display device or a level of the driving voltage and levels of the driving voltages.