Touch screen and manufacturing method thereof, display device

A manufacturing method of a touch screen, comprising:

• providing a base substrate;
• forming electroluminescence pixel units arranged in array on the base substrate;
• and
• forming touch electrodes arranged in array on the electroluminescence pixel units;
• forming a polymer film between the electroluminescent pixel units and the touch electrodes;
• and
• forming a transparent cover plate on the touch electrodes to cover the touch electrodes,
• wherein each of the electroluminescence pixel units at least comprises an anode, a light-emitting layer and a cathode, and the anodes, the light-emitting layers and the cathodes of the electroluminescent pixel units are insulated from the touch electrodes by the polymer film;
• and
• wherein an orthographic projection of each touch electrode on the base substrate has a mesh structure having openings, and an orthographic projection of only one of the electroluminescent pixel units on the base substrate is within each of the openings of the mesh structure;
• wherein all of the touch electrodes are provided in a same layer;
• wherein all of the touch electrodes are provided between the transparent cover plate and the polymer film, directly contact the transparent cover plate and directly contact the polymer film;
• and
• wherein the polymer film is provided between the touch electrodes and the cathodes, directly contacts the touch electrodes and directly contacts the cathodes.