A display device includes a display unit including a plurality of pixels for displaying images, a scan driver which supplies scan signals to the plurality of pixels, a data driver which supplies data signals to the plurality of pixels, a communication module which measures a reception rate of communication signals received through an antenna, a processor which compares the reception rate with a reference reception rate and generating a driving voltage control signal, based on a determination result, and a power supply which generates a first driving voltage to be supplied to each of the scan driver and the data driver where the power supply changes at least one of a first slew rate and a first frequency of the first driving voltage, based on the driving voltage control signal, thereby generating a second driving voltage having at least one of a second slew rate and a second frequency.