Touch display substrate, method for manufacturing the same, driving method thereof, and display device thereof

The touch display substrate according to wherein the switching device comprises a transistor,

• wherein the transistor comprises a functional signal line, an insulating layer, and an active layer which are sequentially disposed between the substrate and each electrode block, and
• wherein an orthographic projection of the functional signal line on the substrate at least covers an orthographic projection of a gap between the adjacent electrode blocks on the substrate, wherein the functional signal line servers as a gate electrode of the transistor, and wherein the insulating layer servers as a gate insulating layer of the transistor.

A driving method for a touch display substrate, wherein the touch display substrate comprises a substrate, a plurality of electrode blocks, independent of each other and arranged in an array, disposed on the substrate, and a switching device disposed between adjacent electrode blocks of the plurality of electrode blocks, the driving method comprising:

• during a touch period, each electrode block receiving a touch scan signal;
• during a display period, each electrode block receiving a common voltage, wherein the switching device electrically isolates the adjacent electrode blocks from each other during the touch period and electrically connects the adjacent electrode blocks during the display period.