Display panel and display apparatus

A display apparatus, comprising an optical sensor and a display panel, wherein the display panel has a display region comprising a first display region and a second display region, the display panel comprising:

• a substrate;
• and
• microstructures and optical auxiliary structures located on a first side of the substrate,
• wherein a refractive index of the microstructures is less than a refractive index of the optical auxiliary structures, and each of the microstructures is located on and embedded in a side of the optical auxiliary structures that is away from the substrate,
• wherein the first display region is provided with at least one of the microstructures, the first display region is provided with a light-emitting device layer, the light-emitting device layer and the at least one of the microstructures are located on the first side of the substrate, the light-emitting device layer comprises a first electrode layer, a light-emitting layer, and a second electrode layer, and the second electrode layer is located on a side of the first electrode layer that is away from the substrate, and
• the microstructures are located on a side of the second electrode layer that is toward the substrate;
• wherein in a direction perpendicular to a plane in which the substrate is located, the optical sensor overlaps at least part of the first display region.