Display device and driving method thereof

A method for driving a display device, comprising:

• setting an initial value of an amplitude of a differential signal in correspondence with digital data of sensing data;
• obtaining the sensing data that is indicative of feature values of a plurality of pixels, the sensing data including a pattern;
• determining a final amplitude of the differential signal by maintaining the initial value of the amplitude of the differential signal or varying the initial value based on the pattern of the sensing data;
• and
• outputting the differential signal having the final amplitude,
• wherein the differential signal is output through a transmission line conforming to a preset interface,
• wherein determining the final amplitude of differential signal comprises:
• classifying the pattern of the sensing data based on whether the sensing data comprises a pulse of one unit interval and a length of a logic low period before or after the pulse of one unit interval;
• varying the amplitude of the differential signal to one of two or more different amplitudes;
• classifying the sensing data into a first pattern responsive to the sensing data lacking the pulse of one unit interval;
• classify the sensing data into a second pattern signifying a second level of transmission loss that is greater than a first level of transmission loss responsive to the sensing data comprising the pulse of one unit interval after a logic low period having a duration that is equal to or more than a first threshold value and less than a second threshold value;
• and
• classify the sensing data into a third pattern signifying a third level of transmission loss that is greater than the second level of transmission loss responsive to the sensing data comprising the pulse of one unit interval after a logic low period having a duration that is greater than or equal to the second threshold value.

A display device, comprising:

• a display panel including a plurality of pixels;
• a data driver configured to generate sensing data that is indicative of feature values of the plurality of pixels, convert the sensing data into a differential signal, and output the differential signal;
• and
• a timing controller configured to compensate image data based on the differential signal and transmit a compensation value to the data driver, vary an amplitude of the differential signal based on a pattern of the sensing data, and transmit control data comprising information on the varied amplitude to the data driver,
• wherein the timing controller is configured to classify the pattern of the sensing data based on whether the sensing data comprises a pulse of one unit interval and a length of a logic low period before or after the pulse of one unit interval,
• wherein the timing controller is further configured to vary the amplitude of the differential signal to one of two or more different amplitudes, and
• wherein the data driver is further configured to:
• classify the sensing data into a first pattern responsive to the sensing data lacking the pulse of one unit interval,
• classify the sensing data into a second pattern signifying a second level of transmission loss that is greater than a first level of transmission loss responsive to the sensing data comprising the pulse of one unit interval after a logic low period having a duration that is greater than or equal to a first threshold value and less than a second threshold value, and
• classify the sensing data into a third pattern signifying a third level of transmission loss that is greater than the second level of transmission loss responsive to the sensing data comprising the pulse of one unit interval after a logic low period having a duration that is greater than or equal to the second threshold value, and
• wherein the timing controller is configured to maintain the amplitude of the differential signal responsive to the sensing data having the third pattern, and decrease the amplitude of the differential signal by a first amount of steps responsive to the sensing data having the first pattern, and decrease the amplitude of the differential signal by a second amount of steps that is less than the first amount of steps responsive to the sensing data having the second pattern.