Patent ID: 8004483

Claim:
An active matrix display device, comprising: a plurality of gate signal lines, a plurality of source signal lines and a plurality of pixel electrodes over a substrate; a color filter formed at a side of the substrate where the plurality of gate signal lines, the plurality of source signal lines and the plurality of pixel electrodes are formed; and a thin film transistor electrically connected to one of the plurality of pixel electrodes, wherein a plurality of first video signals is supplied to the plurality of pixel electrodes through the plurality of source signal lines in a first frame period, wherein a plurality of second video signals of a polarity opposite to that of the plurality of first video signals is supplied to the plurality of pixel electrodes through the plurality of source signal lines in a second frame period subsequent to the first frame period, wherein a frame frequency of the active matrix display device is 120 Hz or more, wherein the polarity of the plurality of first video signals is uniform during the first frame period and the polarity of the plurality of second video signals is uniform during the second frame period, and wherein each of the first frame period and the second frame period is a period in which one image is displayed.