A display panel includes a polarizer and a plurality of optical adjustment layers stacking over one another over the polarizer. The polarizer converts a light incident from its light-incident surface into a linearly polarized light emitting out from its light-emitting surface. Each optical adjustment layer includes a polarization direction-adjusting sub-layer and a quantum rod sub-layer over the polarization direction-adjusting sub-layer. The polarization direction-adjusting sub-layer includes a plurality of adjusting portions and is configured to adjustably control a polarization direction of an incident polarized light. The quantum rod sub-layer includes a plurality of light-excitement portions, and is configured to adjustably change a wavelength of the incident polarized light. Each light-excitement portions contains a plurality of quantum rods, each having its long axis in a substantially same direction. By adjusting the incident light and controlling the plurality of optical adjustment layers, the display panel can realize a full-color display.