Patent ID: 7324077

Claim:
A liquid crystal display comprising: a liquid crystal panel assembly including a plurality of gate lines, a plurality of data lines crossing the gate lines, and a plurality of pixels formed at crossing points of the gate lines and the data lines; a signal controller receiving image data and a synchronization signal from an external graphic source, generating a control signal for driving the liquid crystal panel assembly, and converting format of the image data; a voltage generator generating gray voltages and gate voltages for driving the liquid crystal panel assembly; a gate driver sequentially scanning the gate lines of the liquid crystal panel assembly by unit of horizontal scan period based on the gate voltages; a data driver selecting the gray voltages corresponding to the image data from the signal controller for respective data lines on the liquid crystal panel assembly; an inverter generating a first luminance control signal having an analog value depending on luminance distribution of the image data and a second luminance signal having a pulse duty ratio determined by multiples of a frame frequency, synthesizing the first luminance control signal and the second luminance control signal, and generating a lamp driving signal based on the synthesized signal; and a lamp having on and off states and intensity controlled in response to the driving signal from the inverter.