Display panel and display apparatus

1 . A display panel having a display region comprising a first display region and a second display region, wherein the display panel comprises:

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, wherein each of the microstructures is located on and embedded in a side of one 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, wherein the second electrode layer is located on a first side of the first electrode layer that is away from the substrate, wherein the microstructures are located on a side of the second electrode layer that is towards the substrate;

wherein contact interfaces between the microstructures and the optical auxiliary structures comprise a first interface, wherein the first interface intersects a surface parallel to a plane in which the substrate is located, and the first interface is a plane or a curved surface.

2 . The display panel according to claim 1 , wherein in a direction perpendicular to a plane in which the substrate is located, a thickness of each of the microstructures is d, wherein 20 μm≤d≤50 μm.

3 . The display panel according to claim 1 , wherein at least one of the microstructures has a first surface on a side away from the substrate, and in the at least one of the microstructures, a maximum angle formed between the first interface and the first surface and facing towards an interior of the at least one of the microstructures is θ 1 , wherein 0°<θ 1 ≤33°.

4 . The display panel according to claim 1 , wherein at least one of the microstructures has a first surface on a side away from the substrate, and in the at least one of the microstructures, a maximum angle formed between the first interface and the first surface and facing towards an interior of the at least one of the microstructures is θ 2 , wherein 123°≤θ 2 <180°.

5 . The display panel according to claim 1 , wherein for two adjacent microstructures of the microstructures, the optical auxiliary structures corresponding to the two adjacent microstructures are independent of each other.

6 . The display panel according to claim 1 , wherein at least two microstructures of the microstructures are embedded in one optical auxiliary structure of the optical auxiliary structures.

7 . The display panel according to claim 1 , wherein:

the first display region is provided with a metal structure located on the first side of the substrate, the first display region comprises a light-transmittance region, and

in a direction perpendicular to a plane in which the substrate is located, the metal structure does not overlap the light-transmittance region, and the microstructures do not overlap at least part of the light-transmittance region.

8 . The display panel according to claim 1 , wherein:

the first display region is provided with a metal structure located on the first side of the substrate, and the metal structure comprises a first metal structure, and

the microstructures and at least one of the optical auxiliary structures in contact with the microstructures are located on a same side of the first metal structure that is away from the substrate.

9 . The display panel according to claim 8 , wherein:

the first electrode layer comprises the first metal structure, and

the microstructures comprise at least one first microstructure, and the at least one first microstructure is located on the first side of the first electrode layer that is away from the substrate.

10 . The display panel according to claim 9 , wherein:

at least one of the at least one first microstructure is arranged along a circumferential direction of the first metal structure.

11 . The display panel according to claim 8 , wherein the microstructures are located on a side of the first electrode layer that is toward the substrate.

12 . The display panel according to claim 11 , wherein:

the first display region is provided with a pixel circuit layer that is located on the first side of the substrate, and the light-emitting device layer is located on a side of the pixel circuit layer that is away from the substrate,

the pixel circuit layer comprises a first metal layer, the first metal layer is located on a side of the light-emitting device layer that is toward the substrate, and is a metal layer closest to the light-emitting device layer, wherein the first metal layer comprises the first metal structure, and

the microstructures comprise a second microstructure, and the second microstructure is located on a side of the first metal layer that is toward the light-emitting device layer.

13 . The display panel according to claim 11 , wherein:

the first display region is provided with a pixel circuit layer located on the first side of the substrate, the pixel circuit layer comprises a first metal layer, a second metal layer, and a third metal layer; and the second metal layer is located on a side of the first metal layer that is toward the substrate, and the third metal layer is located on a side of the second metal layer that is toward the substrate,

the second metal layer comprises a first electrode, the third metal layer comprises a second electrode, and in a direction perpendicular to a plane in which the substrate is located, the first electrode and the second electrode overlap with each other to form a storage capacitor,

the second metal layer comprises the first metal structure, and

at least some of the microstructures comprise a third microstructure located on a side of the second metal layer toward the first metal layer.

14 . The display panel according to claim 11 , wherein:

the first display region is provided with a pixel circuit layer located on the first side of the substrate, the pixel circuit layer comprises a first metal layer, a second metal layer, and a third metal layer, the second metal layer is located on a side of the first metal layer that is toward the substrate, the third metal layer is located on a side of the second metal layer that is toward the substrate, the second metal layer comprises a first electrode, the third metal layer comprises a second electrode, and in a direction perpendicular to a plane in which the substrate is located, the first electrode and the second electrode overlap with each other to form a storage capacitor,

the third metal layer comprises the first metal structure, and

at least one of the microstructures comprises a fourth microstructure located on a side of the third metal layer that is toward the second metal layer.

15 . The display panel according to claim 1 , wherein:

at least one of the microstructures further comprises a fifth microstructure arranged along an edge of the first display region.

16 . The display panel according to claim 15 , wherein:

the display panel further comprises a buffer layer and a pixel circuit layer located on the first side of the substrate, and the pixel circuit layer is located on a first side of the buffer layer that is toward to the light-emitting device layer, and

the fifth microstructure is located on a second side of the buffer layer that is toward to the substrate.

17 . 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, wherein contact interfaces between the microstructures and the optical auxiliary structures comprise a first interface, wherein the first interface intersects a surface parallel to a plane in which the substrate is located, and the first interface is a plane or a curved surface; 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.

18 . The display apparatus according to claim 17 , wherein:

an orthographic projection of the optical sensor on the plane in which the substrate is located is a first projection, an orthographic projection of one of the microstructures on the plane in which the substrate is located is a second projection, an overlapping portion between the first projection and the second projection has a length Lin a first direction, and the first direction is parallel to the plane in which the substrate is located, and

the first projection has a length L 0 in the first direction, wherein L 1 <L 0 /2.

19 . The display apparatus according to claim 17 , wherein at least one of the microstructures is arranged along an edge of the first display region.