Touch module, touch display substrate and touch display device

A touch module, comprising:

• a base substrate;
• and
• a conductive grid layer and a bridging pattern disposed on the base substrate;
• wherein the conductive grid layer covers an entire touch area on the base substrate, the conductive grid layer comprises a plurality of first touch electrodes and a plurality of second touch electrodes, the first touch electrodes and the second touch electrodes are arranged crosswise and insulated from each other, each of the first touch electrodes comprises a plurality of connected first sub-electrodes, and each of the second touch electrodes comprises a plurality of independent second sub-electrodes;
• wherein each of the first sub-electrodes and the second sub-electrodes comprises a plurality of grids connected to each other, and the grids are formed by a plurality of crossed conductive lines;
• wherein the bridging pattern and the conductive grid layer are arranged in different layers, and adjacent second sub-electrodes belonging to a same second touch electrode are connected through the bridging pattern;
• wherein the bridging pattern comprises at least one grid pattern, each of the at least one grid pattern comprises at least one grid, and an orthographic projection, on the base substrate, of a region of the bridging pattern where the at least one grid pattern is located overlaps with orthographic projections, on the base substrate, of some of the grids on the conductive grid layer;
• and
• wherein the bridging pattern is connected to the second sub-electrodes through a plurality of contact holes, and the plurality of contact holes are connected through conductive lines.