Discussed is a display device in which an optical sensor can be easily provided on a display panel without causing a decrease in area or a change in shape of an active area by forming a low-resolution area in a partial area of the active area of the display panel and by providing the optical sensor on a back surface of the display panel overlapping the low-resolution area. By providing a light source emitting light for gesture sensing or the like on a flexible printed circuit which is bonded to a non-active area, it is possible to curb an influence of light emitted from the light source on an image, to prevent an increase in area of the non-active area, and to realize a gesture sensing function of the display device.