A method for performing display control of a display panel to display images with aid of dynamic overdrive (OD) strength adjustment, each of the images comprising a plurality of blocks, each of the plurality of blocks comprising a plurality of pixels, each of the plurality of pixels comprising a plurality of sub-pixels, the method comprising:
- encoding image data of a current image to generate encoded image data of the current image, wherein the encoded image data is compressed data of the image data;
- decoding the encoded image data of the current image to generate decoded image data of the current image;
- according to the image data and the decoded image data of the current image, performing block error estimation to generate quantized block error values of blocks of the current image, respectively, wherein the quantized block error values represent compression error of the decoded image data caused by encoding;
- according to the quantized block error values, determining OD depressed gains, respectively;
- and
- according to the OD depressed gains, adjusting OD strength of corresponding blocks within a next image, respectively, for controlling the display panel to display the next image, wherein the OD depressed gains represent reduction magnification regarding the OD strength.