Apparatus driving a liquid crystal display

An apparatus for a liquid crystal display including a plurality of pixels comprising:

• a gray voltage generator for generating a plurality of gray voltages;
• an data driver for selecting gray voltages corresponding to color signals and applying the selected gray voltages as image signal voltages to the pixels;
• and
• a signal controller for controlling the data driver based on the color signals and input control signals for controlling the color signals,
• wherein the gray voltage generator includes a first variable resistor unit connected to the data driver for providing a first variable gray voltage, a first array of resistors connected between the first variable resistor and a first voltage and generating a plurality of second gray voltages to be provided for the data driver, and a second array of resistors having a terminal connected to the first voltage and generating a plurality of third gray voltages.