Touch substrate, touch display panel, touch display device and touch driving method

A method for driving a touch substrate, wherein the touch substrate comprises a base substrate, on which a touch electrode pattern is formed,

• the touch electrode pattern comprises at least one electrode group, and each electrode group comprises a driving electrode and a sensing electrode which are arranged in a row along a first direction of the base substrate and insulated from each other;
• in each electrode group, the driving electrode has a plurality of driving electrode portions coupled to each other, and the sensing electrode has a plurality of sensing electrode blocks;
• each driving electrode portion is respectively between two adjacent sensing electrode blocks;
• the sensing electrode block has a plurality of sensing electrode regions with different areas,
• the plurality of driving electrode portions are coupled end to end and arranged in a zigzag form along the first direction of the base substrate,
• the plurality of driving electrode portions comprise a plurality of first driving electrode portions each of which extends along a second direction perpendicular to the first direction and a plurality of second driving electrode portions each of which extends along an oblique direction with respect to the first direction and the second direction, and
• each of the plurality of first driving electrode portions extending along the second direction is coupled to one of the plurality of second driving electrode portions at one end, and coupled to another of the plurality of second driving electrode portions at the other end,
• wherein the method comprises:
• applying a driving signal to the driving electrode;
• and
• detecting a change in signal before and after a touch occurs so as to determine a touched position on the touch substrate, wherein the change in signal is a change in signal between a touched sensing electrode region of the sensing electrode block and the driving electrode.