Image display system

An image display system, comprising:

• a host configured to generate video image data;
• a touch controller configured to generate touch event information corresponding to a touch signal that is output from a touch panel, wherein the touch event information comprises first touch event information corresponding to a first touch event occurring during an n-th period and second touch event information corresponding to a second touch event occurring during a (n+1)-th period;
• an accelerator configured to generate, based on the touch event information supplied from the touch controller, output image data corresponding to a touch event;
• a display controller configured to supply the output image data generated by the accelerator to a display panel;
• and
• the display panel configured to display an image corresponding to the output image data,
• wherein the image rendered by the accelerator in the (n+1)-th period combines an image segment corresponding to the first touch event occurred during the n-th period and an overlay image segment corresponding to the second touch event occurring during the (n+1)-th period,
• wherein the image rendered by the accelerator in an (n+2)-th period combines an updated image segment and an updated overlay image segment corresponding to a third touch event occurring during the (n+2)-th period, wherein the updated image segment comprises the image segment corresponding to the first touch event occurred during the n-th period and the overlay image segment corresponding to the second touch event occurred during the (n+1)-th period, and
• wherein the overlay image segment corresponding to the second touch event occurred during the (n+1)-th period is replaced with the updated image segment received from the host during the (n+2)-th period.