Display driving integrated circuit, system including the same and display driving method

A display driving integrated circuit comprising:

• a frame memory configured to store display data;
• a driving unit configured to drive a display panel based on the display data stored in the frame memory;
• a touch image generator configured to, in a fast display mode, generate modified display data representing a touch image corresponding to a touch operation of a user based on the display data stored in the frame memory and touch coordinate data;
• and
• a controller configured to control operations of the frame memory, the driving unit and the touch image generator.

A portable electronic device comprising:

• a display panel configured to display images based on display data;
• a touch panel configured to provide touch data;
• a system on chip including a processor configured to generate graphic user interface (GUI) image data;
• a touch integrated circuit configured to generate touch coordinate data based on the touch data;
• a display driving integrated circuit configured to generate the display data based on a display mode;
• and
• a memory device.