A display device includes: a display which includes a display screen on which a video is displayed; a decorative sheet disposed on a display screen side of the display, is larger than the display screen in a front view of the display screen, and covers the display screen, the decorative sheet including a first region which overlaps with the display screen in the front view and a second region which does not overlap with the display screen in the front view; and a controller which controls a luminance of the video that is displayed by the display, based on (i) an illuminance of ambient light around the display and the decorative sheet and (ii) first information indicating a relationship between the illuminance and appearances of a third region corresponding to a black display region of the video in the first region and the second region on the decorative sheet.