A display device comprising: a display unit including a first pixel disposed in a first region and a second pixel disposed in a second region different from the first region; a degradation compensator which generates a first compensated grayscale value (GRAY1') by compensating a first grayscale value (GRAY1) for the first pixel by means of a first grayscale compensation value based on a first degradation curve (CURVE1) and generates a second compensated grayscale value (GRAY2') by compensating a second grayscale value (GRAY2) for the second pixel by means of a second grayscale compensation value based on a second degradation curve (CURVE2) such that the second grayscale compensation value is greater than the first grayscale compensation value for the same grayscale value to be compensated, wherein the first degradation curve (CURVE1) defines a luminance reduction rate according to a first accumulated usage time of the first pixel, and the second degradation curve (CURVE2) defines a luminance reduction rate according to a second accumulated usage time of the second pixel; and a data driver which generates a first data signal (VDATA) based on the first compensated grayscale value (GRAY1'), supplies the first data signal (VDATA) to the first pixel, generates a second data signal (VDATA) based on the second compensated grayscale value (GRAY2'), and supplies the second data signal (VDATA) to the second pixel, wherein a light transmittance of the second region is greater than a light transmittance of the first region, and each of the pixels in the second region emit light at a luminance higher than each of the pixels in the first region for the same grayscale. a display unit including a first pixel disposed in a first region and a second pixel disposed in a second region different from the first region; a degradation compensator which generates a first compensated grayscale value (GRAY1') by compensating a first grayscale value (GRAY1) for the first pixel by means of a first grayscale compensation value based on a first degradation curve (CURVE1) and generates a second compensated grayscale value (GRAY2') by compensating a second grayscale value (GRAY2) for the second pixel by means of a second grayscale compensation value based on a second degradation curve (CURVE2) such that the second grayscale compensation value is greater than the first grayscale compensation value for the same grayscale value to be compensated, wherein the first degradation curve (CURVE1) defines a luminance reduction rate according to a first accumulated usage time of the first pixel, and the second degradation curve (CURVE2) defines a luminance reduction rate according to a second accumulated usage time of the second pixel; and a data driver which generates a first data signal (VDATA) based on the first compensated grayscale value (GRAY1'), supplies the first data signal (VDATA) to the first pixel, generates a second data signal (VDATA) based on the second compensated grayscale value (GRAY2'), and supplies the second data signal (VDATA) to the second pixel, wherein a light transmittance of the second region is greater than a light transmittance of the first region, and each of the pixels in the second region emit light at a luminance higher than each of the pixels in the first region for the same grayscale.