Timing controller, a display device, and a driving method thereof

A method of driving a display device including:

• pixels connected to data lines;
• a data driver configured to provide data voltages to the data lines;
• and a timing controller connected to the data driver through a clock training line and a clock data line, the method comprising:
• providing, from the timing controller, a clock training pattern to the clock data line when the timing controller provides a clock training signal having a first logic level to the clock training line;
• and
• providing, from the timing controller, a clock data signal to the clock data line when the timing controller provides the clock training signal having a second logic level to the clock training line,
• wherein the timing controller provides a first configuration signal including period information on a next clock training pattern when the clock training signal having the second logic level is provided to the clock training line.