A display device of the present invention comprises: a pixel unit including a plurality of pixels and divided into a plurality of division areas; a data driving unit outputting a data signal corresponding to image data to the pixel unit, and controlling a slew rate of the data signal according to bias voltage; and a bias control unit controlling the data driving unit so that the slew rate of the data signal is different for each division area according to a brightness change amount of image data corresponding to each division area.
