A display device includes an insulating substrate, a plurality of gate lines formed on the insulating substrate, a plurality of data lines across the gate lines, a plurality of pixels connected to the gate lines and the data lines, a data driver providing data voltages to the pixels, a first switch assembly between the data driver and the data lines to carry the data voltages to the data lines in response to a first selection signal, and a second switch assembly to carry a reverse voltage to the data lines in response to a second selection signal.