Touch display panel and preparation method thereof, and display apparatus

A touch display panel, comprising:

• a first substrate, comprising a plurality of sub-pixel regions;
• a plurality of light emitting devices, located on one side of the first substrate and corresponding to the plurality of sub-pixel regions one to one;
• a first pixel defining layer, located on sides, facing away from the first substrate, of the plurality of light emitting devices;
• wherein the first pixel defining layer comprises first opening regions corresponding to the plurality of sub-pixel regions one to one;
• a plurality of quantum dot layers, located on the sides, facing away from the first substrate, of the plurality of light emitting devices;
• wherein the plurality of quantum dot layers are in at least part of the first opening regions;
• a touch module, located on sides, facing away from the plurality of light emitting devices, of the plurality of quantum dot layers;
• wherein the touch module comprises a first touch electrode layer;
• and
• a stacked insulation structure between the plurality of quantum dot layers and the first touch electrode layer;
• wherein the stacked insulation structure comprises a first refractive index layer and a second refractive index layer arranged on a whole layer;
• wherein a refractive index of the first refractive index layer is smaller than a refractive index of the second refractive index layer;
• the second refractive index layer is located between the first refractive index layer and the plurality of quantum dot layers;
• the first refractive index layer comprises a plurality of first refractive index patterns, and the plurality of first refractive index patterns correspond to the plurality of quantum dot layers one to one;
• and
• orthographic projections of the plurality of first refractive index patterns on the first substrate at least cover orthographic projections of the plurality of quantum dot layers on the first substrate;
• wherein the touch module further comprises:
• a first buffer layer between the plurality of quantum dot layers and the first touch electrode layer;
• a second touch electrode layer between the first touch electrode layer and the first buffer layer;
• and a first insulation layer between the first touch electrode layer and the second touch electrode layer;
• wherein the second refractive index layer is located between the first buffer layer and the second touch electrode layer;
• the first insulation layer comprises second opening regions corresponding to the plurality of quantum dot layers one to one;
• and
• the plurality of first refractive index patterns are located in the second opening regions.