A display device (100) includes a display panel (110) including a plurality of pixels (PX), a control unit (120) configured to scale image data (DATA) provided from the outside based on an image load factor and to output the scaled image data, and a data driver (130) configured to supply data signals corresponding to the scaled image data to a plurality of data lines (DL) connected to the pixels (PX), wherein the control unit (120) includes a load factor calculating unit (121) configured to calculate a load factor of the image data; and a data scaler (10) configured to scale a gray level of the image data based on a scaling ratio corresponding to a load factor.
