1. A driving method for a pixel array, at least one row of the pixel array comprising a plurality of pixel sets, and at least one of the pixel sets comprising a plurality of pixels, the driving method comprising: providing a plurality of voltages having substantially same phase to a plurality of pixel electrodes of the pixels of one of the pixel sets; providing at least two voltages with phases substantially opposite to each other to the pixel electrodes of the pixels of two of the adjacent pixel sets respectively; driving two adjacent pixels in two of the pixel sets respectively by a gate line; and driving a first pixel in one of the pixel set and another pixel in an adjacent column of the first pixel set by another gate line, wherein a phase of a voltage of a pixel electrode of the first pixel and a phase of a voltage of a pixel electrode of the another pixel are substantially different.