A driving controller of a display device includes: an accumulation unit, which outputs accumulation data, which is obtained by accumulating a deterioration state, and a deterioration stress value based on an input image signal and a deterioration prediction temperature value; a temperature prediction unit that calculates the deterioration prediction temperature value based on the accumulation data, a color acceleration coefficient, a color current contribution ratio, and a temperature signal; and a compensation unit that outputs an output image signal based on the input image signal and the deterioration stress value.