A display device includes a display panel, a light source module and a skin-color detector. The display panel has a plurality of sub pixel units, and the sub pixel units include red sub pixel units, green sub pixel units, blue sub pixel units and white sub pixel units. The light source module is disposed at a side of the display panel and the light source module includes a white light source and a yellow light source distributed in the white light source. The skin-color detector is electrically connected to the display panel, wherein the skin-color detector detects the skin-color area proportion of an image signal of the display panel.