Light emitting panel and method for manufacturing the same, and display device

Patent metadata

Field	Value
Publication number	US-11864446-B2
Application number	US-202017415015-A
Country	US
Kind code	B2
Filing date	Jul 30, 2020
Priority date	Jul 31, 2019
Publication date	Jan 2, 2024
Grant date	Jan 2, 2024

Abstract

A light-emitting panel has a light-emitting region and a non-light-emitting region, and at least one portion of a boundary of the light-emitting region is zigzag-shaped. The light-emitting panel includes: a base substrate, sub-pixels disposed in the light-emitting region on the base substrate: a first encapsulation layer disposed on a side of the plurality of sub-pixels away from the base substrate, and at least one first barrier wall disposed on the first encapsulation layer. Orthogonal projections of the sub-pixels on the base substrate are within an orthogonal projection of the first encapsulation layer on the base substrate. The first barrier wall is located in the non-light-emitting region, and is disposed at a side of the at least one zigzag-shaped portion of the boundary of the light-emitting region proximate to the non-light-emitting region. A refractive index of the first barrier wall is greater than a refractive index of the first encapsulation layer.

First claim

What is claimed is:

1. A light-emitting panel having a light-emitting region and a non-light-emitting region on a periphery of the light-emitting region, at least one portion of a boundary of the light-emitting region being zigzag-shaped, the light-emitting panel comprising:
a base substrate;
a plurality of sub-pixels disposed on a side of the base substrate and located in the light-emitting region;
a first encapsulation layer disposed on a side of the plurality of sub-pixels away from the base substrate, orthogonal projections of the plurality of sub-pixels on the base substrate being within an orthogonal projection of the first encapsulation layer on the base substrate; and
at least one first barrier wall disposed on a side of the first encapsulation layer away from the base substrate, the first barrier wall being located in the non-light-emitting region, and being disposed at a side of the at least one zigzag-shaped portion of the boundary of the light-emitting region proximate to the non-light-emitting region, wherein
a refractive index of the first barrier wall is greater than a refractive index of the first encapsulation layer; and the first barrier wall is configured to guide out light propagating in the first encapsulation layer and scatter the light, so that the scattered light is emitted from a light exit surface of the light-emitting panel.

2. The light-emitting panel according to claim 1 , wherein the refractive index of the first barrier wall is in a range of 1.7 to 1.9, and the refractive index of the first encapsulation layer is in a range of 1.6 to 1.7.

3. The light-emitting panel according to claim 1 , further comprising a second encapsulation layer disposed on a side of the first barrier wall and the first encapsulation layer that is away from the base substrate, wherein
the orthogonal projection of the first encapsulation layer on the base substrate is within an orthogonal projection of the second encapsulation layer on the base substrate; and
a refractive index of the second encapsulation layer is greater than the refractive index of the first barrier wall.

4. The light-emitting panel according to claim 3 , wherein the refractive index of the second encapsulation layer is in a range of 1.9 to 2.0.

5. The light-emitting panel according to claim 3 , further comprising at least one second barrier wall disposed in the non-light-emitting region and beside the second encapsulation layer, wherein
a refractive index of the second barrier wall is less than the refractive index of the second encapsulation layer; and
the second barrier wall is configured to reflect and/or scatter light entering the second barrier wall, so that the light is emitted from the light exit surface of the light-emitting panel.

6. The light-emitting panel according to claim 5 , wherein the refractive index of the second barrier wall is in a range of 1.8 to 1.9.

7. The light-emitting panel according to claim 5 , wherein the second barrier wall includes a first side face proximate to the light-emitting region and a bottom face proximate to the base substrate, and an included angle between the first side face and the bottom face is in a range of 40° to 60°.

8. The light-emitting panel according to claim 5 , wherein the at least one zigzag-shaped portion of the boundary of the light-emitting region constitutes at least one step; and the step includes a first step surface and a second step surface; and
the first barrier wall is in a shape of a column, and includes a first columnar surface opposite to the first step surface, and a second columnar surface opposite to the second step surface and connected to the first columnar surface; and an included angle between the first columnar surface and the second columnar surface is approximately equal to an included angle between the first step surface and the second step surface.

9. The light-emitting panel according to claim 8 , wherein the first barrier wall further includes a third columnar surface connected to the first columnar surface and the second columnar surface; and
the second barrier wall includes a second side face proximate to the light-emitting region, and the second side face is opposite to the third columnar surface.

10. The light-emitting panel according to claim 5 , wherein a surface of the second barrier wall facing away from the base substrate is higher than a surface of the first barrier wall facing away from the base substrate with respect to the base substrate.

11. The light-emitting panel according to claim 10 , wherein a thickness of the first barrier wall is in a range of 5 μm to 9 μm; and
with respect to the base substrate, the surface of the second barrier wall facing away from the base substrate is higher than the surface of the first barrier wall facing away from the base substrate by 1 μm to 7 μm.

12. The light-emitting panel according to claim 5 , wherein the second barrier wall and the first barrier wall have a distance therebetween.

13. The light-emitting panel according to claim 5 , wherein the first barrier wall includes a first organic matrix and a plurality of first nano-particles distributed in the first organic matrix; and
the second barrier wall includes a second organic matrix and a plurality of second nano-particles distributed in the second organic matrix, wherein
a particle size of the second nano-particles is greater than a particle size of the first nano-particles, and a distribution density of the second nano-particles is greater than a distribution density of the first nano-particles.

14. The light-emitting panel according to claim 13 , wherein the particle size of the first nano-particles is in a range of 5 nm to 200 mm, and the particle size of the second nano-particles is in a range of 5 nm to 200 mm; and
the distribution density of the first nano-particles is in a range of 0.5% wt to 5% wt, and the distribution density of the second nano-particles is in the range of 0.5% wt to 5% wt.

15. The light-emitting panel according to claim 5 , further comprising a third encapsulation layer disposed on a side of the second encapsulation layer and the second barrier wall that is away from the base substrate, wherein
orthogonal projections of the second encapsulation layer and the second barrier wall on the base substrate are within an orthogonal projection of the third encapsulation layer on the base substrate; and
a refractive index of the third encapsulation layer is less than the refractive index of the second barrier wall.

16. The light-emitting panel according to claim 15 , wherein the refractive index of the third encapsulation layer is in a range of 1.7 to 1.8.

17. The light-emitting panel according to claim 1 , wherein each sub-pixel includes:
a pixel driving circuit disposed between the base substrate and the first encapsulation layer; and
a light-emitting device disposed between the pixel driving circuit and the first encapsulation layer and electrically connected to the pixel driving circuit, wherein
the light-emitting device includes:
a second electrode layer electrically connected to the pixel driving circuit;
a light-emitting layer disposed on a side of the second electrode layer away from the pixel driving circuit; and
a first electrode layer disposed on a side of the light-emitting layer away from the pixel driving circuit.

18. A method for manufacturing a light-emitting panel, the light-emitting panel having a light-emitting region and a non-light-emitting region on a periphery of the light-emitting region, and at least one portion of a boundary of

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Huang Xing
• Ren Yanping

Classifications

• H10K59/879 Primary

  comprising refractive means, e.g. lenses · CPC title

• H10K59/878

  comprising reflective means · CPC title

• H10K59/877

  comprising scattering means · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/353 Primary

  characterised by the geometrical arrangement of the RGB subpixels · CPC title