US-12628534-B2 - Display panel and manufacturing method thereof, and display device

Abstract

Provided are a display panel and a manufacturing method thereof, and a display device. The display panel includes a base substrate; a pixel defining layer on one side of the base substrate and having a plurality of first openings for defining a plurality of sub-pixels, the plurality of first openings being in one-to-one correspondence to the plurality of sub-pixels; and an encapsulation layer on one side of the pixel defining layer away from the base substrate. The encapsulation layer includes a first inorganic layer; a second inorganic layer on one side of the first inorganic layer away from the base substrate; an organic layer between the first inorganic layer and the second inorganic layer; and at least one first optical structure between the first inorganic layer and the organic layer. A refractive index of each first optical structure is greater than that of the organic layer.

Inventors

• Cheng Han
• Xing Fan
• Qixiao WU
• Songquan WU
• Yanming Wang
• Xu Li
• Yansong LI

Assignees

• BOE TECHNOLOGY GROUP CO., LTD.

Dates

Publication Date

20260512

Application Date

20220424

Claims (20)

1. 1 . A display panel, comprising: a base substrate; a pixel defining layer located on one side of the base substrate and having a plurality of first openings for defining a plurality of sub-pixels, wherein the plurality of first openings is in one-to-one correspondence to the plurality of sub-pixels; an encapsulation layer located on one side of the pixel defining layer away from the base substrate, and comprising: a first inorganic layer, a second inorganic layer located on one side of the first inorganic layer away from the base substrate, an organic layer located between the first inorganic layer and the second inorganic layer, and at least one first optical structure located between the first inorganic layer and the organic layer, wherein a refractive index of each first optical structure is greater than a refractive index of the organic layer; and a first light modulation layer located on one side of the encapsulation layer away from the base substrate, and comprising: a first light modulation sub-layer, at least one second optical structure located between the encapsulation layer and the first light modulation sub-layer, wherein the refractive index of each second optical structure is greater than a refractive index of the first light modulation sub-layer, and a second light modulation sub-layer located between the at least one second optical structure and the encapsulation layer.
2. 2 . The display panel according to claim 1 , wherein each first optical structure comprises a first surface and a second surface arranged oppositely, and a third surface and a fourth surface arranged oppositely, wherein the second surface is located on one side of the first surface away from the base substrate, each of the third surface and the fourth surface is adjacent to the first surface and the second face, a comprised angle between each of the third surface and the fourth surface and the first surface is in one of a first range and a second range, wherein the first range is greater than or equal to 60 degrees and smaller than or equal to 90 degrees, and the second range is greater than or equal to 100 degrees and smaller than or equal to 120 degrees.
3. 3 . The display panel according to claim 1 , wherein a surface of the first inorganic layer away from the base substrate has a plurality of recess portions in one-to-one correspondence to the plurality of first openings, the at least one first optical structure is in one-to-one correspondence to at least one recess portion of the plurality of recess portions, and each first optical structure is at least partially located in a recess portion corresponding to each first optical structure.
4. 4 . The display panel according to claim 3 , wherein each first optical structure comprises a first portion located in the recess portion and a second portion outside the recess portion, and an orthographic projection of the first portion on the base substrate is located within an orthographic projection of the second portion on the base substrate.
5. 5 . The display panel according to claim 4 , wherein an area of the orthographic projection of the first portion on the base substrate is smaller than an area of the orthographic projection of the second portion on the base substrate.
6. 6 . The display panel according to claim 3 , wherein an orthographic projection of each first optical structure on the base substrate is a fourth orthographic projection, an orthographic projection of a first opening corresponding to each first optical structure on the base substrate is a first orthographic projection, a region that the fourth orthographic projection and the first orthographic projection overlap with each other is a first region, and at least one of the fourth orthographic projection or the first orthographic projection comprises the first region and a second region other than the first region.
7. 7 . The display panel according to claim 6 , wherein the fourth orthographic projection comprises the second region, a part of an edge of the fourth orthographic projection overlapping with the second region of the fourth orthographic projection is a first edge, a part of an edge of the first orthographic projection overlapping with the first region is a second edge, and a minimum distance between the first edge and the second edge is smaller than or equal to 3 microns.
8. 8 . The display panel according to claim 6 , wherein the first orthographic projection comprises the second region, a part of an edge of the first orthographic projection overlapping with the second region of the first orthographic projection is a third edge, a part of an edge of the fourth orthographic projection overlapping with the first region is a fourth edge, and a minimum distance between the third edge and the fourth edge is smaller than or equal to 1 microns.
9. 9 . The display panel according to claim 1 , wherein each first optical structure comprises a first surface and a second surface arranged oppositely, the second surface is located on one side of the first surface away from the base substrate, and the second surface is substantially parallel to a surface of the base substrate.
10. 10 . The display panel according to claim 1 , wherein each first optical structure comprises an organic body.
11. 11 . The display panel of claim 10 , wherein each first optical structure further comprises an inorganic nanostructure located in the organic body, wherein the inorganic nanostructure comprises at least one of a nanoparticle or a nanowire, and a material of the inorganic nanostructure comprises at least one of zirconia or titania.
12. 12 . The display panel according to claim 10 , wherein the refractive index of each first optical structure is 1.65 to 1.95.
13. 13 . The display panel according to claim 11 , wherein a refractive index of the organic body is 1.5 to 1.6, and a refractive index of the inorganic nanostructure is 2 to 2.2.
14. 14 . The display panel according to claim 10 , wherein the encapsulation layer further comprises: a third inorganic layer located between the at least one first optical structure and the organic layer.
15. 15 . The display panel according to claim 14 , wherein the at least one first optical structure is not in contact with the organic layer.
16. 16 . The display panel according to claim 1 , wherein the at least one first optical structure is integrally provided with the first inorganic layer.
17. 17 . The display panel according to claim 1 , further comprising: a second light modulation layer located on one side of the encapsulation layer away from the base substrate, the second light modulation layer comprising: a third light modulation sub-layer having at least one second opening, wherein the at least one second opening is in one-to-one correspondence to at least one sub-pixel; and a fourth light modulation sub-layer comprising a first light modulation portion located in each of the at least one second opening, wherein the second light modulation layer is configured such that light from each of the at least one sub-pixel propagates along a direction away from the base substrate after total reflection upon incidence on an interface between a side surface of the first light modulation portion in a second opening corresponding to each of the at least one sub-pixel and the third light modulation sub-layer, wherein an orthographic projection of a first opening corresponding to each of the at least one sub-pixel on the base substrate is a first orthographic projection, and at least a part of an edge of the first orthographic projection has a recess, and wherein an orthographic projection of the second opening corresponding to each of the at least one sub-pixel on the base substrate is a second orthographic projection, and at least a part of an edge of the second orthographic projection has at least one of a recess or a protrusion.
18. 18 . A display device, comprising the display panel according to claim 1 .
19. 19 . A manufacturing method of a display panel, comprising: providing a base substrate; forming a pixel defining layer on one side of the base substrate, wherein the pixel defining layer has a plurality of first openings for defining a plurality of sub-pixels, and the plurality of first openings is in one-to-one correspondence to the plurality of sub-pixels; forming an encapsulation layer on one side of the pixel defining layer away from the base substrate, comprising forming a first inorganic layer, at least one first optical structure, an organic layer and a second inorganic layer sequentially, wherein: the second inorganic layer is located on one side of the first inorganic layer away from the base substrate, the organic layer is located between the first inorganic layer and the second inorganic layer, and the at least one first optical structure is located between the first inorganic layer and the organic layer, wherein a refractive index of each first optical structure is greater than a refractive of the organic layer; and forming a first light modulation layer on one side of the encapsulation layer away from the base substrate, the first light modulation layer comprising: a first light modulation sub-layer, at least one second optical structure located between the encapsulation layer and the first light modulation sub-layer, wherein the refractive index of each second optical structure is greater than a refractive index of the first light modulation sub-layer, and a second light modulation sub-layer located between the at least one second optical structure and the encapsulation layer.
20. 20 . A display panel, comprising: a base substrate; a pixel defining layer located on one side of the base substrate and having a plurality of first openings for defining a plurality of sub-pixels, wherein the plurality of first openings is in one-to-one correspondence to the plurality of sub-pixels; and an encapsulation layer located on one side of the pixel defining layer away from the base substrate, and comprising: a first inorganic layer, a second inorganic layer located on one side of the first inorganic layer away from the base substrate, an organic layer located between the first inorganic layer and the second inorganic layer, and at least one first optical structure located between the first inorganic layer and the organic layer, wherein a refractive index of each first optical structure is greater than a refractive index of the organic layer, wherein each first optical structure comprises a first surface and a second surface arranged oppositely, and a third surface and a fourth surface arranged oppositely, wherein the second surface is located on one side of the first surface away from the base substrate, each of the third surface and the fourth surface is adjacent to the first surface and the second surface, a comprised angle between each of the third surface and the fourth surface and the first surface is in one of a first range and a second range, wherein the first range is greater than or equal to 60 degrees and smaller than or equal to 90 degrees, and the second range is greater than or equal to 100 degrees and smaller than or equal to 120 degrees.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is the United States national phase of International Patent Application No. PCT/CN2022/088671, filed Apr. 24, 2022, the disclosure of which is incorporated by reference herein in its entirety. BACKGROUND OF THE INVENTION Field of the Invention The present disclosure relates to a display panel and a manufacturing method thereof, and a display device. Description of Related Art With the development of the display technology, the organic light-emitting diode (OLED) display panel is more and more extensively applied. In a display panel, light emitted by a light-emitting device (for example, OLED) in a sub-pixel may pass through a plurality of film layers with different refractive indexes, thereby causing light loss. SUMMARY OF THE INVENTION According to one aspect of the embodiments of the present disclosure, provided is a display panel, comprising: a base substrate; a pixel defining layer located on one side of the base substrate and having a plurality of first openings for defining a plurality of sub-pixels, wherein the plurality of first openings is in one-to-one correspondence to the plurality of sub-pixels; and an encapsulation layer located on one side of the pixel defining layer away from the base substrate. The encapsulation layer comprises: a first inorganic layer; a second inorganic layer located on one side of the first inorganic layer away from the base substrate; an organic layer located between the first inorganic layer and the second inorganic layer; and at least one first optical structure located between the first inorganic layer and the organic layer, wherein a refractive index of each first optical structure is greater than a refractive index of the organic layer. In some embodiments, each first optical structure comprises a first surface and a second surface arranged oppositely, and a third surface and a fourth surface arranged oppositely, wherein the second surface is located on one side of the first surface away from the base substrate, each of the third surface and the fourth surface is adjacent to the first surface and the second face, a comprised angle between each of the third surface and the fourth surface and the first surface is in one of a first range and a second range, wherein the first range is greater than or equal to 60 degrees and smaller than or equal to 90 degrees, and the second range is greater than or equal to 100 degrees and smaller than or equal to 120 degrees. In some embodiments, a surface of the first inorganic layer away from the base substrate has a plurality of recess portions in one-to-one correspondence to the plurality of first openings, the at least one first optical structure is in one-to-one correspondence to at least one recess portion of the plurality of recess portions, and each first optical structure is at least partially located in a recess portion corresponding to each first optical structure. In some embodiments, each first optical structure comprises a first portion located in the recess portion and a second portion outside the recess portion, and an orthographic projection of the first portion on the base substrate is located within an orthographic projection of the second portion on the base substrate. In some embodiments, an area of the orthographic projection of the first portion on the base substrate is smaller than an area of the orthographic projection of the second portion on the base substrate. In some embodiments, an orthographic projection of each first optical structure on the base substrate is a fourth orthographic projection, an orthographic projection of a first opening corresponding to each first optical structure on the base substrate is a first orthographic projection, a region that the fourth orthographic projection and the first orthographic projection overlap with each other is a first region, and at least one of the fourth orthographic projection or the first orthographic projection comprises the first region and a second region other than the first region. In some embodiments, the fourth orthographic projection comprises the second region, a part of an edge of the fourth orthographic projection overlapping with the second region of the fourth orthographic projection is a first edge, a part of an edge of the first orthographic projection overlapping with the first region is a second edge, and a minimum distance between the first edge and the second edge is smaller than or equal to 3 microns. In some embodiments, the first orthographic projection comprises the second region, a part of an edge of the first orthographic projection overlapping with the second region of the first orthographic projection is a third edge, a part of an edge of the fourth orthographic projection overlapping with the first region is a fourth edge, and a minimum distance between the third edge and the fourth edge is smaller than or equal to 1 microns. In some embodiments, each first optical structu