Display driving apparatus for operating display device that displays image and control method therefor

A display driving apparatus configured to operate a display device that displays an image, the display driving apparatus comprising:

• a timing controller configured to receive a first image signal (RGB) from an external system, convert the first image signal (RGB) into a second image signal (RGB′), and output the second image signal (RGB′);
• a data driver configured to convert the second image signal (RGB′) into a source signal based on to a data control signal generated by the timing controller;
• and
• an energy harvesting device configured to convert heat energy generated by the data driver into a voltage,
• wherein the data driver is configured to:
• calculate a temperature of the data driver based on the converted voltage;
• and
• change a resistance for impedance matching between the timing controller and the data driver based on the calculated temperature.