A control circuit driving a display panel and including a transmission interface, a charging circuit, an image driving circuit, and a loading management circuit is provided. The transmission interface is configured to be coupled to the display panel. The charging circuit is configured to charge a capacitor. The image driving circuit transforms the voltage of the capacitor into a plurality of driving signals and provides the driving signals to the display panel via the transmission interface. The loading management circuit measures the charge time of the capacitor. In response to the charge time of the capacitor exceeding a threshold value, the loading management circuit asserts a flag to indicate the occurrence of an overload.