Pixel structural designs on a display panel are disclosed. Each pixel on the display panel includes a plurality of sub-pixels. The sub-pixels are arranged sequentially along a vertical direction and used for displaying different colors in a circle. The display panel in the disclosure can be switched between a two-dimensional mode and a three-dimensional mode. In the three-dimensional mode, parts of the sub-pixels are disabled for forming a shielding area. Other adjacent sub-pixels form a pixel displaying unit.