A display device, includes: a display panel comprising a plurality of pixels; a signal controller which receives an n+k bit first image signal to divide one frame into 2k number of sub frames and generates a non-image signal according to an upper k most significant bits of the binary code and a second image signal with a lower n bit, of the first image signal in one frame with a predetermined rate; and a data driver which supplies a data voltage selected on the basis of the non-image signal and the second image signal, to the pixels.