1. A pixel driving method applied in a display panel comprising a plurality of pixel blocks that each of which comprises a first pixel, a second pixel, a third pixel and a fourth pixel, wherein the first pixel and the second pixel are arranged sequentially along a first direction, the third pixel and the fourth pixel are arranged sequentially along the first direction, the first pixel and the third pixel are arranged sequentially along a second direction, the first pixel, the second pixel, the third pixel and the fourth pixel respectively comprises a plurality of sub-pixels, the sub-pixels in the first pixel and the sub-pixels in the second pixel that are adjacent to the sub-pixels in the first pixel have the same color, the sub-pixels in the first pixel and the sub-pixels in the third pixel that are adjacent to the sub-pixels in the first pixel have the same color, the sub-pixels in the second pixel and the sub-pixels in the fourth pixel that are adjacent to the sub-pixels in the second pixel have the same color, the sub-pixels in the third pixel and the sub-pixels in the fourth pixel that are adjacent to the sub-pixels in the third pixel have the same color, and the pixel driving method comprises: receiving a first image comprising a plurality of image points that each of which is corresponding to a display color; generating a first sub-image and a second sub-image according to the first image, wherein the first sub-image displays a part of the image points through the pixel blocks, and the second sub-image displays another part of the image points through the pixel blocks; and displaying at least one of the first sub-image and the second sub-image on the display panel.