A display device includes: a display unit including sub-pixels; and a signal processor configured to output output signals based on pixel data. A set of the sub-pixels includes first to fourth sub-pixels. The fourth sub-pixel is assigned a first color component as a white component in one of the two pieces of the pixel data arranged in one direction. The first to third sub-pixels are assigned second color components other than the first color component. When a signal level for lighting one or more of the first to third sub-pixels in the set of the sub-pixels is at a first level, and a signal level for one or more of the first to third sub-pixels is at a second level lower than the first level, the signal processor increases the signal levels corresponding to the second color components as a signal level corresponding to the first color component increases.