Touch substrate, method for manufacturing the same, and touch display device

A method for manufacturing a touch substrate, comprising steps of:

• forming a light-shielding pattern at edge portions of a substrate, the light-shielding pattern defining a visual area;
• forming a touch electrode layer on the substrate on which the light-shielding pattern is formed, the touch electrode layer comprising a plurality of first touch electrodes sequentially arranged in a first direction and a plurality of second touch electrodes insulated from the first touch electrodes and sequentially arranged in a second direction intersected with the first direction;
• the plurality of first touch electrodes and the plurality of second touch electrodes each comprising a plurality of visual touch electrodes, an intermediate portion of each visual touch electrode being located within the visual area, and two end portions of each visual touch electrode extending above the light-shielding pattern;
• the plurality of first touch electrodes and/or the plurality of second touch electrodes also each comprising a plurality of non-visual touch electrodes located above the light-shielding pattern;
• forming a first insulating pattern on the substrate on which the touch electrode layer is formed, the projection of the first insulating pattern in a third direction perpendicular to the first direction and the second direction being all located within the light-shielding pattern;
• and
• forming touch signal wires on the first insulating pattern, the touch signal wires being electrically connected to all visual touch electrodes and part of the non-visual touch electrodes, respectively, or connected only to all visual touch electrodes.