Patent ID: 8018451

Claim:
A liquid crystal display (LCD) comprising: a voltage generation unit which outputs a gate-on voltage and first and second gate-off voltages, the first and second gate-off voltages being different from each other; a clock generation unit which outputs a first clock signal and a second clock signal whose phase is opposite to the phase of the first clock signal, the first clock signal swinging between the gate-on voltage and the first gate-off voltage; a gate driving unit which is provided with the first clock signal, the second clock signal, and the second gate-off voltage and outputs a gate signal; and a display unit which comprises a plurality of pixels that are turned on or off in response to the gate signal and that display an image, wherein the voltage generation unit comprises: a temperature sensor which outputs a temperature-variable voltage which varies according to the ambient temperature; a boost converter which generates a driving voltage and a pulse signal by boosting a first input voltage and outputs the driving voltage and the pulse signal, the driving voltage varying according to the temperature-variable voltage; a gate-on voltage generator which generates the gate-on voltage by shifting the driving voltage by an amount corresponding to the voltage of the pulse signal and outputs the gate-on voltage; a first gate-off voltage generator which generates the first gate-off voltage by shifting the second input voltage by the amount corresponding to the voltage of the pulse signal and outputs the first gate-off voltage; and a second gate-off voltage generator which receives the first gate-off voltage, generates the second gate-off voltage by dividing the first gate-off voltage, and outputs the second gate-off voltage.