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, wherein the image points comprises a first image point, a second image point, a third image point, a fourth image point, a fifth image point, a sixth image point, a seventh image point, an eighth image point and a ninth image point, the first image point, the second image point and the third image point are arranged sequentially along the first direction, the fourth image point, the fifth image point and the sixth image point are arranged sequentially along the first direction, the seventh image point, the eighth image point and the ninth image point are arranged sequentially along the first direction, the first image point, the fourth image point and the seventh image point are arranged sequentially along the second direction, and said generating the first sub-image comprises: displaying the first image point by the first pixel; displaying the third image point by the second pixel; displaying the seventh image point by the third pixel; and displaying the ninth image point with by fourth pixel; and said generating the second sub-image comprises: arranging the sub-pixels of the first pixel and the second pixel to define a first re-arranged pixel to display the second image point; arranging the sub-pixels of the first pixel and the third pixel to define a second re-arranged pixel to display the fourth image point; arranging the sub-pixels of the second pixel and the fourth pixel to define a third re-arranged pixel to display the sixth image point; and arranging the sub-pixels of the third pixel and the fourth pixel to define a fourth re-arranged pixel to display the eighth image point.