A display apparatus comprising: a display panel configured to display a normal image in a normal mode and display a static image in a Panel Self Refresh, PSR, mode; a data driver; and a timing controller configured to receive image data from a graphics processor, the timing controller comprising a compensation controller, a memory, a comparator, and a compensator; wherein the compensation controller is configured to: receive a PSR starting signal for controlling a start of the PSR mode, a PSR ending signal for controlling an end of the PSR mode, and a re-synchronization ending signal for controlling a start of the normal mode, the starting, ending and resynchronization signals being received from the graphics processor, and compress, using a compression algorithm, image data of an N-th frame to produce refresh image data, wherein: the N-th frame is a selected frame corresponding to a static image in the PSR mode; the memory is configured to store the refresh image data, the comparator is configured to compare image data of the N-th frame received from a graphics processor and the refresh image data readout from the memory; the compensator is configured to generate a compensation value based on a comparison result and adding the compensation value to the refresh image data; and the data driver is configured to generate a data voltage using refresh image data compensated by the compensator and outputting the data voltage to the display panel by every frame in the PSR mode; characterized in that the display apparatus further comprises: a light-source configured to provide the display panel with a light; a light-source driver configured to control a luminance level of the light; and a luminance controller configured to control the light-source driver to generate a boosting light of a boosting luminance level in a re-synchronization mode, the boosting luminance level is higher than a normal luminance level of a normal light generated in the PSR mode and the normal mode. a display panel configured to display a normal image in a normal mode and display a static image in a Panel Self Refresh, PSR, mode; a data driver; and a timing controller configured to receive image data from a graphics processor, the timing controller comprising a compensation controller, a memory, a comparator, and a compensator; wherein the compensation controller is configured to: receive a PSR starting signal for controlling a start of the PSR mode, a PSR ending signal for controlling an end of the PSR mode, and a re-synchronization ending signal for controlling a start of the normal mode, the starting, ending and resynchronization signals being received from the graphics processor, and compress, using a compression algorithm, image data of an N-th frame to produce refresh image data, wherein: the N-th frame is a selected frame corresponding to a static image in the PSR mode; the memory is configured to store the refresh image data, the comparator is configured to compare image data of the N-th frame received from a graphics processor and the refresh image data readout from the memory; the compensator is configured to generate a compensation value based on a comparison result and adding the compensation value to the refresh image data; and the data driver is configured to generate a data voltage using refresh image data compensated by the compensator and outputting the data voltage to the display panel by every frame in the PSR mode; the N-th frame is a selected frame corresponding to a static image in the PSR mode; the memory is configured to store the refresh image data, the comparator is configured to compare image data of the N-th frame received from a graphics processor and the refresh image data readout from the memory; the compensator is configured to generate a compensation value based on a comparison result and adding the compensation value to the refresh image data; and the data driver is configured to generate a data voltage using refresh image data compensated by the compensator and outputting the data voltage to the display panel by every frame in the PSR mode; characterized in that the display apparatus further comprises: a light-source configured to provide the display panel with a light; a light-source driver configured to control a luminance level of the light; and a luminance controller configured to control the light-source driver to generate a boosting light of a boosting luminance level in a re-synchronization mode, the boosting luminance level is higher than a normal luminance level of a normal light generated in the PSR mode and the normal mode. a light-source configured to provide the display panel with a light; a light-source driver configured to control a luminance level of the light; and a luminance controller configured to control the light-source driver to generate a boosting light of a boosting luminance level in a re-synchronization mode, the boosting luminance level is higher than a normal luminance level of a normal light generated in the PSR mode and the normal mode.