Patent ID: 7362299

Claim:
A driving circuit of an active matrix liquid crystal display device comprising a plurality of video signal lines for transmitting a plurality of video signals representing an image to be displayed, a plurality of scanning signal lines intersecting the plurality of video signal lines, and a plurality of pixel formation portions that are arranged in a matrix in correspondence with intersections of the plurality of video signal lines and the plurality of scanning signal lines, the respective pixel formation portions being charged with a voltage of the video signal transmitted by the video signal line passing through a corresponding intersection when the scanning signal line passing through the corresponding intersection is selected, the driving circuit comprising: a polarity instruction circuit for outputting a polarity instruction signal indicating polarities of voltages to be applied to the pixel formation portions, such that, in each polarity equilibrium period obtained by grouping together a predetermined number of consecutive frame periods to one polarity equilibrium period, the number of frame periods in which the polarity of the voltage at each of the pixel formation portions becomes positive is the same as the number of frame periods in which the polarity of the voltage at each of the pixel formation portions becomes negative; a scanning signal line driving circuit for selectively driving the plurality of scanning signal lines; and a video signal line driving circuit for supplying the plurality of video signals generated based on the polarity instruction signal to the plurality of video signal lines, wherein there is no regularity in the order of the occurrence of the polarity of the voltages at the pixel formation portions in each polarity equilibrium period.