Display panel, manufacturing method thereof and display device

Patent metadata

Field	Value
Publication number	US-11895863-B2
Application number	US-202117486702-A
Country	US
Kind code	B2
Filing date	Sep 27, 2021
Priority date	Sep 29, 2020
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A display panel, a manufacturing method and a display device are provided. The display panel includes a substrate having a display area and a non-display area; a planarization layer covering the display area and the non-display area of the substrate; an organic light emitting element located in the display area and located at a side of the planarization layer away from the substrate; an encapsulation structure including a first inorganic layer, an organic layer and a second inorganic layer which are sequentially stacked, where the first inorganic layer and the second inorganic layer extend into a non-display area, and the first inorganic layer is arranged close to the planarization layer; and/or, a part of the planarization layer located in the non-display area is provided with a groove, and the groove is filled with a flexible water-oxidation resistant material.

First claim

What is claimed is:

1. A display panel, comprising:
a substrate having a display area and a non-display area;
a planarization layer covering the display area and the non-display area of the substrate;
an organic light emitting element located in the display area and located at a side of the planarization layer away from the substrate;
an encapsulation structure wrapping the organic light emitting element, wherein the encapsulation structure comprises a first inorganic layer, an organic layer and a second inorganic layer which are sequentially stacked, the first inorganic layer and the second inorganic layer extend into the non-display area, and the first inorganic layer is arranged close to the planarization layer;
wherein the display panel further comprises:
a third inorganic layer, wherein the third inorganic layer is located in the non-display area and is located between the planarization layer and the first inorganic layer; and/or
a part of the planarization layer located in the non-display area is provided with a groove, and the groove is filled with a flexible water-oxidation resistant material;
wherein the display panel further comprises a fourth inorganic layer located in the display area and between the first inorganic layer and the organic layer, and a roughness of the fourth inorganic layer is greater than a roughness of the first inorganic layer.

2. The display panel according to claim 1 , wherein materials constituting the first inorganic layer, the second inorganic layer, and the third inorganic layer each independently comprise at least one of silicon oxide, silicon nitride, and silicon oxynitride.

3. The display panel according to claim 1 , wherein a water vapor transmission rate of the third inorganic layer is less than a water vapor transmission rate of the first inorganic layer.

4. The display panel according to claim 1 , wherein the third inorganic layer has a thickness of 0.1-1 μm.

5. The display panel according to claim 1 , wherein an orthographic projection of the third inorganic layer on the substrate coincides with an orthographic projection of a part of the planarization layer located in the non-display area on the substrate.

6. The display panel according to claim 1 , wherein the flexible water-oxidation resistant material comprises at least one of polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene, fluorocarbon resin, and silicone rubber.

7. The display panel according to claim 1 , wherein the groove penetrates through the planarization layer in a thickness direction of the planarization layer.

8. A method for manufacturing a display panel, comprising:
providing a substrate having a display area and a non-display area;
forming a planarization layer on the display area and the non-display area of the substrate;
forming an organic light emitting element on a side of the planarization layer away from the substrate, wherein the organic light emitting element is located in the display area;
forming an encapsulation structure wrapping the organic light emitting element, wherein the encapsulation structure comprises a first inorganic layer, an organic layer and a second inorganic layer which are sequentially stacked, the first inorganic layer and the second inorganic layer extend into the non-display area, and the first inorganic layer is arranged close to the planarization layer;
wherein the method further comprises:
forming a third inorganic layer, causing that the third inorganic layer is located in the non-display area and is located between the planarization layer and the first inorganic layer; and/or
providing a groove in a part of the planarization layer located in the non-display area, and filling the groove with a flexible water-oxidation resistant material;
wherein subsequent to the providing the first inorganic layer and prior to the providing the organic layer, the method further comprises:
forming a fourth inorganic layer in the display area, wherein a roughness of the fourth inorganic layer is greater than a roughness of the first inorganic layer.

9. The method according to claim 8 , wherein a water vapor transmission rate of the third inorganic layer is less than a water vapor transmission rate of the first inorganic layer.

10. The method according to claim 8 , wherein an orthographic projection of the third inorganic layer formed on the substrate coincides with an orthographic projection of a part of the planarization layer in the non-display area on the substrate.

11. The method according to claim 8 , wherein the groove is formed by patterning the planarization layer through a predetermined mask.

12. A display device, comprising a display panel;
wherein the display panel comprises:
a substrate having a display area and a non-display area;
a planarization layer covering the display area and the non-display area of the substrate;
an organic light emitting element located in the display area and located at a side of the planarization layer away from the substrate;
an encapsulation structure wrapping the organic light emitting element, wherein the encapsulation structure comprises a first inorganic layer, an organic layer and a second inorganic layer which are sequentially stacked, the first inorganic layer and the second inorganic layer extend into the non-display area, and the first inorganic layer is arranged close to the planarization layer;
wherein the display panel comprises a third inorganic layer, and the third inorganic layer is located in the non-display area and is located between the planarization layer and the first inorganic layer; and/or
a part of the planarization layer located in the non-display area is provided with a groove, and the groove is filled with a flexible water-oxidation resistant material;
wherein the display panel further comprises a fourth inorganic layer located in the display area and between the first inorganic layer and the organic layer, and a roughness of the fourth inorganic layer is greater than a roughness of the first inorganic layer.

13. The display device according to claim 12 , wherein materials constituting the first inorganic layer, the second inorganic layer, and the third inorganic layer each independently comprise at least one of silicon oxide, silicon nitride, and silicon oxynitride.

14. The display device according to claim 12 , wherein a water vapor transmission rate of the third inorganic layer is less than a water vapor transmission rate of the first inorganic layer.

15. The display device according to claim 12 , wherein the third inorganic layer has a thickness of 0.1-1 μm.

16. The display device according to claim 12 , wherein an orthographic projection of the third inorganic layer on the substrate coincides with an orthographic projection of a part of the planarization layer located in the non-display area on the substrate.

17. The display device according to claim 12 , wherein the flexible water-oxidation resistant material comprises at least one of polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene, fluorocarbon resin, and silicone rubber.

18. The display device according to claim 12 , wherein the groove penetrates through the planarization layer in a thickness direction of the planarization layer.

Assignees

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

Inventors

• Yang Heng
• Li Wei
• Zeng Yanbo
• Huang Yinglong

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K50/844 Primary

  Encapsulations · CPC title

• H10K59/124 Primary

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K71/00 Primary

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K2102/00

  Constructional details relating to the organic devices covered by this subclass · CPC title