A display device is provided with a display panel; a correction circuit which performs gamma correction on target image data in response to correction data specifying a gamma curve; and a driver circuit driving the display panel in response to gamma-corrected data received from the correction circuit. The correction circuit is configured to perform approximate gamma correction in accordance with a correction expression in which the target image data is defined as a variable of the correction expression and coefficients of the same are determined on the correction data, and to modify the correction data in response to target image data associated with the target pixel of the gamma correction and the pixel adjacent to the target pixel.