Display device and driving method thereof

A display device comprising:

• a plurality of pixels connected to respective scan lines;
• a scan driver configured to supply scan signals of a turn-on level to the scan lines at a cycle corresponding to a cycle of a horizontal synchronization signal;
• a plurality of first sensors and a plurality of second sensors overlapping at least some of the pixels;
• and
• a sensor driver configured to concurrently supply first sensing signals to the first sensors during a first sensing period, to concurrently supply second sensing signals to the second sensors during a second sensing period, and to sequentially supply third sensing signals to the first sensors during a third sensing period,
• wherein a number of the first sensing signals is n, where n is an integer greater than 2,
• wherein the first sensing signals are divided into m first groups, where m is an integer less than n and greater than 1, and
• wherein an initial first sensing signal in each of the first groups is synchronized with the horizontal synchronization signal.