Touch sensor integrated type display device and method of operating the same

A method of operating a touch sensor integrated type display device including a display panel including pixels connected to data lines and gate lines and division-driven into a plurality of panel blocks and a plurality of touch sensors connected to the pixels, the method comprising:

• providing, by a display driving circuit, data of an input image to the pixels in a plurality of display periods divided from one frame period;
• driving the touch sensors and sensing a touch input in a touch sensing period allocated between the display periods of the one frame period, by a touch sensing circuit;
• division-driving adjacent panel blocks of the display panel in the display periods that are separated from each other with the touch sensing period, in which the touch sensors are driven, interposed therebetween;
• by a shift register in the display driving circuit:
• shifting a gate pulse in accordance with a shift clock timing;
• and
• sequentially supplying the gate pulse to the gate lines;
• increasing a voltage of a first output terminal in response to a voltage of a Q node, by a first pull-up transistor in an ith stage of the shift register, where “i” is a natural number;
• discharging the voltage of the first output terminal to a first low potential voltage in response to a voltage of a QB node, by a first pull-down transistor in the ith stage of the shift register;
• charging the Q node in response to a voltage of a start pulse input terminal, by a first transistor in the ith stage of the shift register;
• controlling a current path between the Q node and a variable low potential voltage line, by a Q node discharge controller including at least one transistor in the ith stage of the shift register;
• and
• receiving, by the variable low potential voltage line, a high potential voltage during at least a portion of the touch sensing period.