Touch display device and method for driving the touch display device

A touch display device, comprising:

• a touch unit and a display unit;
• the touch unit comprises a first touch electrode layer having a plurality of first touch electrodes, each of which comprises a plurality of touch sub-electrodes;
• the display unit comprises an array substrate, a color filter substrate disposed opposite to the array substrate, a display function layer disposed between the array substrate and the color filter substrate, and a plurality of gate electrodes disposed on the array substrate;
• wherein, a projection of each of the touch sub-electrodes in a direction perpendicular to the array substrate is located between two adjacent ones of the plurality of gate electrodes;
• wherein, each of the touch sub-electrodes partly covers the two adjacent gate electrodes corresponding to the touch sub-electrode, and a width of the touch sub-electrode is smaller than an outer width between the two adjacent gate electrodes corresponding to the touch sub-electrode, and larger than an inner width between the two adjacent gate electrode corresponding to the touch sub-electrode;
• or each of the touch sub-electrodes does not cover the two adjacent gate electrodes corresponding to the touch sub-electrode, and the width of the touch sub-electrode is smaller than or equal to the inner width between the two adjacent gate electrode corresponding to the touch sub-electrode;
• wherein, the outer width is a distance between a first side of a first gate electrode and a second side of a second gate electrode, the first side and the second side are facing away from each other, and the inner width is a distance between a third side of the first gate electrode and a fourth side of the second gate electrode, the third side and the fourth side face each other, wherein the first gate electrode and the second gate electrode are the two adjacent gate electrodes.