An image display period of a first sub frame of an N-th frame is arranged to partly overlap the image display period of the second sub frame of the N-th frame and the image display period of a second sub frame of the (N−1)-th frame. Grayscale display voltages with which pixels that are horizontally or vertically neighbored are charged are arranged to have inverse polarities, and the polarity of the grayscale display voltage charging each pixel is reversed in each frame. Furthermore, neighboring data signal lines are short-circuited each time the polarity of the grayscale display voltage output to each data signal line is reversed.