Display driver integrated circuit and display driving method for generating clock pattern

A display driver integrated circuit, for driving a display panel of an electronic device, comprising:

• an image processing circuit, configured to generate an output image based on time information, a background image, and an original time indication image;
• a timing controller, coupled to the image processing circuit, and configured to receive the output image and generate a processed output image;
• and
• a data driving circuit, coupled to the timing controller, and configured to receive the processed output image and generate data voltages according to the processed output image,
• wherein the data driving circuit drives the display panel according to the data voltages,
• wherein the image processing circuit comprises:
• a scaling unit, configured to change an image size of the original time indication image to generate a scaled time indication image;
• a location arrangement unit, coupled to the scaling unit, configured to transform coordinates of a reference point in the scaled time indication image which is input to the location arrangement unit to coordinates of an image stacking location in the background image;
• a mask generating unit, configured to generate a mask image according to the scaled time indication image which is input to the mask generating unit, wherein the scaled time indication image is different from the mask image;
• a rotating unit, coupled to the location arrangement unit and the mask generating unit, and configured to rotate the coordinate transformed scaled time indication image and the mask image by a rotation angle corresponding to the time information to generate a rotated time indication image and a rotated mask image,
• an image stacking unit, coupled to the location arrangement unit and the mask generating unit, and configured to process the rotated time indication image which is input to the image stacking unit by using the rotated mask image to generate a processed rotated time indication image, and stack the processed rotated time indication image on the background image to generate the output image according to coordinates of the image stacking location,
• wherein the image stacking unit generates a plurality of first coefficients by dividing a plurality of reference grayscale values of the rotated mask image by a maximum grayscale value respectively, and the image stacking unit generates a plurality of first grayscale values of the output image according to the plurality of first coefficients, the rotated mask image, and the rotated time indication image.