A display device may include a data driver, a data line, a display panel that includes a first sub-pixel and a second sub-pixel both connected to the data line and respectively positioned in a first region and a second region of the display panel, and a timing controller that may receive first-type image signals and second-type image signals. The first-type image signals may correspond to a first gray-scale and may correspond to the first region. The second-type image signals may correspond to a second gray-scale and may correspond to the second region. The timing controller may use the first gray-scale to generate a compensated gray-scale if a difference between the first gray-scale and the second gray-scale is greater than a reference value. The data driver may generate a gray-scale voltage according to the compensated gray-scale and may provide the gray-scale voltage through the data line to the first sub-pixel.