Display device and driving method thereof

A display device comprising:

• a timing controller configured to supply a clock training pattern through a data/clock signal line in a first period, and supply a plurality of pixel data and a plurality of data control signals through the data/clock signal line in a second period;
• a data driver configured to generate a clock signal, using the clock training pattern, in the first period, and generate a plurality of data voltages based on the plurality of pixel data, using the clock signal, in the second period;
• and
• a plurality of pixels configured to receive the plurality of data voltages and emit corresponding light,
• wherein during the second period, the data driver outputs a feedback signal to the timing controller indicating that locking of the clock signal has failed, and
• the timing controller re-supplies the clock training pattern in response to the feedback signal,
• wherein the data driver includes:
• a lock detector coupled to a feedback line carrying the feedback signal during the first period, the lock detector providing the feedback signal during the first period at a level indicative of whether the clock signal has locked;
• and
• an edge detector coupled to the feedback line during the second period, wherein the edge detector provides the feedback signal during the second period at a level indicative of whether the clock signal has locked.

A display device comprising:

• a timing controller configured to supply a clock training pattern through a data/clock signal line in a first period, and supply a plurality of pixel data and a plurality of data control signals through the data/clock signal line in a second period;
• a data driver configured to generate a clock signal, using the clock training pattern, in the first period, and generate a plurality of data voltages based on the plurality of pixel data, using the clock signal, in the second period;
• and
• a plurality of pixels configured to receive the plurality of data voltages and emit corresponding light,
• wherein during the second period, the data driver outputs a feedback signal to the timing controller indicating that locking of the clock signal has failed, and
• the timing controller re-supplies the clock training pattern in response to the feedback signal,
• wherein during the second period:
• in response to the feedback signal, the timing controller suspends the supply of the plurality of pixel data and the plurality of data control signals and re-supplies the clock training pattern;
• the data driver re-generates the clock signal based on the re-supplied clock training pattern and outputs the feedback signal at a different voltage level back to the timing controller, the different voltage level representing that the locking of the clock signal has succeeded;
• and
• the timing controller resumes the supply of the plurality of pixel data and the plurality of data control signals in response to receiving the feedback signal at the different voltage level.

A method for driving a display device, the method comprising:

• in a first period, supplying, by a timing controller, a clock training pattern through a data/clock signal line, and generating, by a data driver, a clock signal using the clock training pattern, which comprises generating a plurality of phase signals having a frequency corresponding to that of the clock training pattern in the first period, and generating the clock signal using the plurality of phase signals;
• in a second period, supplying, by the timing controller, a plurality of pixel data and a plurality of data control signals through the data/clock signal line, and generating, by the data driver, a plurality of data voltages based on the plurality of pixel data using the clock signal;
• and
• supplying the plurality of data voltages to a plurality of pixels to emit light corresponding to the plurality of data voltages,
• wherein during the second period the data driver outputs a feedback signal to the timing controller on a feedback line, the feedback signal indicating whether locking of the clock signal has failed, and
• re-supplying, by the timing controller, the clock training pattern upon receiving the feedback signal in a state indicating the locking of the clock signal has failed.

Display device circuitry comprising:

• a timing controller circuit configured to supply a clock training pattern through a first signal line during a vertical blanking period of a frame, and supply a plurality of pixel data through the first signal line during an active data period of the frame;
• and
• a data driver circuit configured to generate a clock signal, using the clock training pattern in the vertical blanking period, and generate a plurality of data voltages to be output to a plurality of pixels, based on the plurality of pixel data using the clock signal;
• wherein during the active data period:
• when there is no electrostatic discharge that causes locking of the clock signal to fail in a manner uncorrectable by the data driver circuit, no clock training pattern is supplied by the timing controller circuit after initiation of the supply of the plurality of pixel data;
• and
• when an electrostatic discharge causes locking of the clock signal to fail in a manner uncorrectable by the data driver circuit, the data driver circuit outputs a feedback signal to the timing controller circuit indicating the locking of the clock signal has failed, and the timing controller circuit re-supplies the clock training pattern in response to the feedback signal.