DISPLAY DEVICE AND METHOD FOR CONTROLLING PANEL SELF REFRESH OPERATION THEREOF

PROBLEM TO BE SOLVED: To provide a display device which comprises an eDP interface and can reduce the size of a frame buffer mounted on a sink unit and prevent loss of an original image during panel self refresh driving for saving power consumption, and a method for controlling a panel self refresh operation thereof.SOLUTION: A display device comprises a source unit and a sink unit, and provides signal transmission between the source unit and the sink unit via an eDP interface and enables panel self refresh driving for reducing power consumption. If an input image is a still image, the source unit applies operating power to a frame buffer of the sink unit, and transmits data of the still image to the sink unit. The sink unit determines whether the data of the still image can be losslessly compressed and stored in the frame buffer or not, and outputs a control signal depending on the determination. The source unit selectively activates the panel self refresh driving in response to the control signal depending on whether the data can be losslessly compressed and stored.