What is claimed is:1. An organic light emitting diode display apparatus comprising:a display panel;a discharge circuit configured to discharge a voltage of a capacitor included in the discharge circuit when a supply of power to the display panel is interrupted after the display panel is driven for more than a predetermined time and to output a signal based on the discharged voltage of the capacitor;an afterimage compensation circuit configured to perform afterimage compensation by applying a reduced amount of a current flowing through a pixel constituting the display panel; anda processor configured to:determine whether a cooling time that the display panel is turned off for cooling the display panel before performing afterimage compensation of the display panel is satisfied based on the signal output from the discharge circuit, wherein the cooling time corresponds to a reference time for determining whether to perform the afterimage compensation, andperform the afterimage compensation of the display panel using the afterimage compensation circuit based on a determination that the cooling time has been satisfied.2. The organic light emitting diode display apparatus according to claim 1, wherein the discharge circuit further comprises:a first switch configured to be turned on or off according to whether the power is supplied to the display panel; anda second switch configured to be turned on or off according to whether the capacitor is charged or discharged, andthe processor is further configured to determine whether the cooling time is satisfied according to a state of the second switch.3. The organic light emitting diode display apparatus according to claim 2, wherein the discharge circuit further comprises:a discharge control terminal configured to apply a high signal for turning on the first switch according to whether the power is supplied to the display panel; anda discharge check terminal configured to output a discharge-completed signal based on a voltage measured at a first reference point.4. The organic light emitting diode display apparatus according to claim 3, wherein the discharge check terminal is further configured to output the discharge-completed signal when voltage at the first reference point is a second voltage or higher and the second switch is turned off, wherein the discharge-completed signal is not output while the second switch is turned on and the voltage at the first reference point is a first voltage or lower.5. The organic light emitting diode display apparatus according to claim 4, wherein the processor is configured to perform the afterimage compensation if output of the discharge-completed signal is detected from the discharge check terminal.6. The organic light emitting diode display apparatus according to claim 5, wherein, if the discharge-completed signal is not detected, the processor is configured to output a notification indicating that the cooling time of the display panel is not satisfied.7. The organic light emitting diode display apparatus according to claim 6, wherein the processor is further configured to perform the afterimage compensation if the cooling time is satisfied.8. The organic light emitting diode display apparatus according to claim 4, further comprising a third switch configured to invert the voltage at the first reference point and output an inverted voltage at a second reference point as the voltage at the first reference point increases from the first voltage to the second voltage.9. The organic light emitting diode display apparatus according to claim 8, wherein the third switch is a field effect transistor.10. The organic light emitting diode display apparatus according to claim 4, wherein the discharge circuit further comprises a reset IC circuit disposed between the second switch and the discharge check terminal and configured to output the discharge-completed signal if a predetermined voltage or more is input to the reset IC circuit.11. The organic light emitting diode display apparatus according to claim 3, wherein the processor is further configured to:recharge a voltage of the capacitor if the discharge-completed signal is detected as a first occurrence; anddetect a malfunction and prevent the afterimage compensation if the discharge-completed signal is redetected within a predefined period of time of the first occurrence.12. The organic light emitting diode display apparatus according to claim 3, wherein the discharge control terminal is a general port input/output (GPIO) output terminal, and the discharge check terminal is a GPIO input terminal.13. The organic light emitting diode display apparatus according to claim 2, wherein the first switch is a bipolar junction transistor, and the second switch is a field effect transistor.
