Display Device and Driving Method of the same

The present invention comprises the signal transmission between the system board portion and the circuit board unit through the interface, the panel self-refresh to reduce power consumption; in the display device of the (Panel Self-Refresh hereinafter abbreviated as follows PSR) driving, the a circuit board unit for a display device comprising a PSR control section for changing the driving frequency of the system if the PSR oN signal is supplied from the board section the system board unit PSR on the gate driver and the data driver at a high frequency than the reference frequency of the drive established by the to provide.