A display device includes: a system unit which output image signals corresponding to frames and a first or second image control signal based on the image signals; an eDP reception unit which receives the image signals and the first or second image control signal from the system unit, provides a still image signal based on the first image control signal, and provides the image signals based on the second image control signal; and a frame memory which stores the still image signal and outputs the still image signal while the first image control signal is provided to the eDP reception unit, where the still image signal is one of the image signals; the eDP reception unit recovers first clock signals based on the image signals; and the frame memory outputs the still image signal based on a second clock signal generated based on the first clock signal.