A display device includes a display panel including a first sub-pixel which displays a first color and is connected to a first data line and a gate line, a gate driver which provides a gate signal to the gate line, a source driver which provides a data voltage to the first data line in a display scan period of a frame and provides a first self-scan voltage to the first data line in a self-scan period of the frame, and a timing controller which calculates a first ratio of each of grayscale values of first color image data for the first color of the frame and determines the first self-scan voltage based on the first ratio.