Display device

A display device comprising:

• a data clock signal line;
• a shared signal line;
• a timing controller which supplies a clock training signal through the data clock signal line and a first control signal through the shared signal line in a first period of one frame, and supplies image data through the data clock signal line in a second period of the one frame;
• a data driver including data driving circuits which generate a clock signal based on the clock training signal and the first control signal in the first period, and generate data voltages based on the clock signal and the image data in the second period;
• and
• a pixel part which receives the data voltages from the data driver,
• wherein the data driver supplies a second control signal which indicates a reception state of the data driver to the timing controller through the shared signal line in the second period.