Touch Display Device, Touch System, Driving Circuit, and Driving Method

A touch display device comprising:

• a display panel to drive display of an image during a display period, the display panel including a plurality of common electrodes;
• a touch controller to sense a first region of the display panel that is not in contact with a human body during a sensing period and a second region of the display panel that is in contact with the human body during the first sensing period, the first region including a first subset of the plurality of electrodes and the second region including a second subset of the plurality of electrodes;
• and
• a driving circuit configured to supply an uplink signal to the first subset of the plurality of electrodes in the first region of the display panel during an uplink period following the sensing period, and to not supply the uplink signal to the second subset of the plurality of electrodes in the second region of the display panel.