The discharge circuit 130 has been described as being present as a separate element from the processor 190, but is not limited thereto. The discharge circuit 130 may be included in the configuration of the processor 190.

The discharge circuit 130 may be included in the processor 190 in the form of System On Chip (SOC), or may be configured separately from the processor 190, which is in the SOC form, and connected to the processor 190.

Referring to FIGS. 2 and 3, the discharge circuit 130 may include a DC power supply unit 131, a discharge control terminal 132, a first switch 133, a capacitor 134, a second switch 135, and a discharge check terminal 136.

In FIGS. 2 and 3, the discharge control terminal 132 and the discharge check terminal 136 are described as being included in the discharge circuit 130, but this is merely an example. The discharge control terminal 132 and the discharge check terminal 136 may be included in the processor 190.

Hereinafter, it is assumed that the case where the supply of power to the display panel 150 is interrupted includes both the case where the supply of AC power to the display panel 150 is interrupted and the case where the supply of DC power to the display panel 150 is interrupted.

The processor 190 may determine whether the cooling time necessary for cooling the display panel 150 is secured, during a period of time during which the supply of power to the display panel 150 through the discharge circuit 130 is turned off (interrupted).