Patent ID: 8111229

Claim:
A liquid crystal display device, comprising: a liquid crystal display panel including a plurality of data lines, a plurality of gate lines, and a plurality of liquid crystal cells, the plurality of liquid crystal cells associated to a first and second liquid crystal cell groups; a data drive circuit to supply a data voltage to the data lines in response to a source output enable signal and invert a polarity of the data voltage in response to a polarity control signal; a gate drive circuit to recognize a start horizontal line in response to a gate start pulse and supply a scan pulse to the gate lines; a polarity control circuit to generate the polarity control signal for each frame period and to control data voltage polarity frequencies of the first and second liquid crystal cell groups to be different from each other, and a timing controller to generate the source output enable signal and the gate start pulse, wherein the polarity control circuit includes: a frame counter to count the gate start pulse to generate a frame count information that indicates the number of frames, a line counter to count the source output enable signal to generate a line count information that indicates the number of display lines of the liquid crystal display panel, a polarity control signal generation circuit to generate a first to fourth polarity control signals based on the frame count information and the line count information, and a multiplexer to sequentially select the first to fourth polarity control signals in response to the frame count information, wherein the gate start pulse from the timing controller is input to the gate drive circuit and the frame counter to simultaneously control an operation timing of the gate drive circuit and the frame counter, and wherein the source output enable signal from the timing controller is input to the data drive circuit and the line counter to simultaneously control an operation timing of the data drive circuit and the line counter.