A combined display panel including: a first sub-screen comprising a plurality of first pixel units, each of the first pixel units comprising a first sub-pixel and a third sub-pixel; a second sub-screen comprising a plurality of second pixel units corresponding to the first pixel units, each of the second pixel units comprising a second sub-pixel; wherein the first sub-screen overlaps with the second sub-screen, each of the second pixel units is located directly above the first pixel unit corresponding thereto, a first pixel unit and a second pixel unit are stacked to form a pixel unit of the combined display panel.