Display panel, preparation method thereof, and display device

A display panel, comprising a display substrate and a touch panel arranged on the display substrate, wherein

• the display substrate comprises multiple sub-pixels, and at least one of the sub-pixels comprises an emitting region and a non-emitting region located on a periphery of the emitting region;
• the touch panel comprises multiple touch electrodes, and at least one of the touch electrodes comprises multiple grid patterns enclosed by metal wires;
• an orthographic projection of the emitting region on the display substrate is located within a range of an orthographic projection of a region enclosed by the metal wires on the display substrate;
• an orthographic projection of the metal wires on the display substrate is located within a range of an orthographic projection of the non-emitting region on the display substrate;
• the touch panel comprises a touch region, a bonding region located at a side of the touch region, and a border region located at another side of the touch region;
• a grounding wire and an auxiliary grounding wire are arranged in the border region;
• and
• the auxiliary grounding wire is connected to the grounding wire to form a branched structure with the grounding wire.