Embodiments of the present invention disclose a pixel unit made up of three rhombic sub-pixels spliced with each other, and, every two adjacent rhombic sub-pixels of the three rhombic sub-pixels share one common edge and are symmetrical about the common edge. In accordance to embodiments of the present invention, the rhombic sub-pixels have larger sizes and accordingly can be achieved in the existing production line with adoption of the existing mature production technology. Accordingly, high production yield, small spreading difficulty, and wide application prospect can be achieved for products. Meanwhile, embodiments of the present invention also provide a display panel, a display method and a display device.