Under-run compensation circuit, method thereof, and apparatuses having the same

A display controller for preventing image deterioration of a display device, the display controller comprising:

• an under-run compensation circuit configured to:
• receive a clock signal;
• receive data;
• and
• output the clock signal and dummy data based on a count value for the clock signal, when an under-run detection signal indicates that an under-run is occurring.

A method of preventing image deterioration of a display device, the method comprising:

• receiving a clock signal and data;
• receiving an under-run detection signal that indicates whether or not an under-run is occurring;
• outputting the clock signal and the data when receiving an under-run detection signal that indicates that an under-run is not occurring;
• and
• outputting the clock signal and dummy data when receiving an under-run detection signal that indicates that an under-run is occurring.