A display device includes: a first data driving chip including: a first data driving circuit to generate a first data signal; and a first sensor to sense a first overcurrent flowing in the first data driving circuit based on a first power current flowing in the first data driving circuit to generate a first signal; a second data driving chip including: a second data driving circuit to generate a second data signal; and a second sensor to sense a second overcurrent flowing in the second data driving circuit based on a second power current flowing in the second data driving circuit to generate a second signal; and a power controller to control first and second powers respectively supplied to the first and second data driving chips, and to block at least one of the first and second powers based on at least one of the first and second signals.