The invention belongs to the field of displaying technologies and particularly relates to a display device. The display device comprises a display panel comprising a color film substrate, an array substrate and a liquid crystal layer, wherein the color film substrate and the array substrate are arranged oppositely, and the liquid crystal layer is arranged between the color film substrate and the array substrate. The display panel is divided into a central region and a peripheral region around the central region. An additional polarizer is arranged on a region, between the array substrate and the liquid crystal layer, corresponding to the peripheral region. According to the display device, because the additional polarizer is arranged on the region, between the array substrate and the liquid crystal layer, corresponding to the peripheral region, light leakage can be effectively prevented from happening on the peripheral region of the display panel, and the light leakage situation of the peripheral region of the display panel is improved; meanwhile, a back light unit is adopted in a matched mode and makes the brightness of the peripheral region be higher than the brightness of the central region, so that uniformity of display images is guaranteed, and good overall image quality is provided even in a normally black mode.