Discussed is a display device. The display device includes a panel in which a self-capacitive touch panel including a plurality of touch electrodes is built, and a touch sensing unit configured to, during a touch sensing period in one frame period, supply a current to the touch electrodes, hold touch voltages of the respective touch electrodes when an average voltage of the touch electrodes reaches a predetermined reference voltage, and compare each of the touch voltages with a slope voltage to determine whether each of the touch electrodes is touched while the touch voltages are being held.