An exemplary method for driving a display panel with plural dithering units formed by plural pixels arranged in a matrix form, includes steps as follows: driving sub-pixel units of the pixels according to a sequence of frames to enable each sub-pixel unit selectively having a positive polarity or a negative polarity; and providing a series of predetermined dithering patterns with a cyclical change period for the dithering units. For each color of the sub-pixels in a same row of the pixels of each dithering unit, summations of the polarities of same color sub-pixels cancel each other out.