A display device and a method for driving the display device are provided. A pre-gain correction value that can emphasize a contour portion of an image is set by using luminance data detected from an input video signal. The pre-grain correction value is differently amplified in accordance with different light emitting materials that emit light of different colors red, green and blue. The contour portion is thus emphasized, and the contour can be stably emphasized regardless of different life-spans of different light emitting materials emitting lights of colors red, green and blue.