Display panel, manufacturing method thereof, and display module

A display module, wherein the display module comprises a display panel and comprises a polarizing layer and a cover plate disposed on the display panel;

• the display panel comprises a substrate and a pixel unit disposed on the substrate;
• and the pixel unit comprises:
• a thin film transistor (TFT) array disposed on the substrate, the TFT array comprises a plurality of TFTs arranged in an array, an active layer, an active layer, a first gate insulating layer, a first metal layer, a second gate insulating layer, a second metal layer, an interlayer insulating layer, and a third metal layer sequentially stacked on each other, wherein the third metal layer is connected to the active layer through a via hole;
• a planarization layer disposed on the TFT array;
• a pixel defining layer disposed on the planarization layer, the pixel defining layer comprising a plurality of pixel defining bodies spaced apart from each other;
• and
• a light emitting device disposed in an area between the pixel defining bodies, the light emitting device comprising:
• an anode electrode layer disposed on the planarization layer;
• a cathode electrode layer disposed over the anode electrode layer;
• at least two light emitting layers disposed between the anode electrode layer and the cathode electrode layer;
• and
• at least one auxiliary electrode layer, each auxiliary electrode layer being disposed between two adjacent ones of the light emitting layers;
• wherein the at least one auxiliary electrode layer, the anode electrode layer, and the cathode electrode layer are separated from each other;
• and the light emitting layers are separated from each other, a first through hole penetrates the planarization layer, and a second through hole and a third through hole penetrate the pixel defining layer and the planarization layer for connecting the third metal layer of the TFT array to the light emitting device.