Display device and method for controlling panel self refresh operation thereof

PURPOSE: A display device and a panel self-refresh operation control method thereof reduce power consumption by compressing data of an input still image without loss and transmitting the compressed image to a synchronization unit. CONSTITUTION: A still image detection unit (110) detects a still image by analyzing an input image. A compression unit (120) compresses data of the still image without loss using a compression algorithm. A panel self-refresh (PSR) control unit (130) compares the capacity of the compressed data and the capacity of a frame buffer, activates a PSR operation when the capacity of the compressed data is equal to or less than the capacity of the frame buffer, and transmits the compressed image to a synchronization unit (200). An embedded display port (eDP) transmission unit (140) selectively transmits the compressed image or a normal image (an uncompressed image) to the synchronization unit according to the logic of a PSR flag bit. [Reference numerals] (110) Still image detection unit; (120) Compression unit; (130) PSR control unit; (140) eDP transmission unit; (210) eDP reception unit; (220) Remote frame buffer; (230) Restoration unit; (240) TCON logic unit; (260) Display unit; (AA,CC,EE) Normal image; (BB,DD,FF) Compressed image; (GG) Restored image