Display Device and Method of Controlling a Power Integrated Circuit

The present invention is a display device, and relates to a control method of the power integrated circuit, a controller for generating a switch pulse which is synchronized to the input video, and initialize the switch pulse in the frame blanking period without the input image, and the switching pulse control It is driven according to a signal and a power integrated circuit for generating the power to the display panel. More than 0 and contrast adjustment in the normal period duration duty ratio is set within the frame blanking period of the switching pulse signal is adjusted to within 3%. Accordingly, the present invention can be controlled to the minimum duty ratio change of the switched pulse signal in the frame blanking period to prevent image degradation due to power fluctuations.