Display apparatus and method of driving display panel using the same

A display apparatus comprising:

• a display panel configured to display an image;
• a driving controller configured to generate a compensated image data for compensating a decrease of a luminance of an edge portion of the display panel based on input image data;
• and
• a data driver configured to output a data voltage to the display panel based on the compensated image data,
• wherein the driving controller is configured to generate the compensated image data by comparing a maximum value among subpixel grayscale values of the input image data to which a luminance compensating coefficient is applied and a maximum grayscale value of the input image data,
• wherein the luminance compensating coefficient is configured to be determined according to a location in the display panel,
• wherein the driving controller is configured to determine a first luminance compensating coefficient of a first outermost area of the display panel, to apply the first luminance compensating coefficient to subpixel grayscale values of the first outermost area, to determine a first maximum value which is a maximum value among the subpixel grayscale values of the first outermost area to which the first compensation coefficient is applied, and to compare the first maximum value and the maximum grayscale value of the input image data, and
• wherein, when the first maximum value is greater than the maximum grayscale value of the input image data, the driving controller is configured to determine a first compensation grayscale difference as a difference between the maximum grayscale value and a first prior maximum value which is a maximum value among the subpixel grayscale values of the first outermost area in which the first luminance compensating coefficient is not applied.