Display panel and manufacturing method thereof, and display device

Patent metadata

Field	Value
Publication number	US-11233115-B2
Application number	US-201816624400-A
Country	US
Kind code	B2
Filing date	Nov 15, 2018
Priority date	Mar 12, 2018
Publication date	Jan 25, 2022
Grant date	Jan 25, 2022

Abstract

A display panel and a manufacturing method thereof, and a display device are disclosed. The display panel includes: a substrate, a plurality of pixel units and a pixel defining layer, each of at least one of the pixel units comprises an organic functional layer, and the organic functional layer has a raised edge; an orthographic projection of the organic functional layer of each pixel unit on the substrate is surrounded by an orthographic projection of the second defining layer on the substrate, an orthographic projection of the first defining layer on the substrate covers the orthographic projection of the second defining layer on the substrate, and the orthographic projection of the first defining layer on the substrate overlaps with an orthographic projection of at least a portion of the raised edge on the substrate the brightness uniformity of the display panel may be improved.

First claim

What is claimed is:

1. A display panel, comprising:
a substrate; and
a plurality of pixel units and a pixel defining layer which are on the substrate, each of at least one of the pixel units comprises an organic functional layer, and the organic functional layer has a raised edge; wherein
the pixel defining layer comprises a first defining layer and a second defining layer, the first defining layer is on a side of the second defining layer away from the substrate; and an orthographic projection of the organic functional layer of each pixel unit on the substrate is surrounded by an orthographic projection of the second defining layer on the substrate, an orthographic projection of the first defining layer on the substrate covers the orthographic projection of the second defining layer on the substrate, and the orthographic projection of the first defining layer on the substrate overlaps with an orthographic projection of at least a portion of the raised edge on the substrate,
wherein each of the at least one of the pixel units further comprises a first electrode and a second electrode, the organic functional layer is on a side of the first electrode away from the substrate, and the second electrode is on a side of the first defining layer away from the organic functional layer, and
wherein a material of the second defining layer is a conductive material, the second defining layer has a conductive isolation region, and the conductive isolation region is used to isolate first electrodes in any two adjacent pixel units.

2. The display panel of claim 1 , wherein an orthographic projection of the first electrode of each pixel unit on the substrate is surrounded by the orthographic projection of the second defining layer on the substrate; and a thickness of the second defining layer is more than or equal to the sum of a thickness of the first electrode and a thickness of the organic functional layer.

3. The display panel of claim 1 , wherein the material of the first defining layer is polyimide; and the material of the second defining layer is any one of silicon nitride, silicon monoxide, and a metal oxide.

4. The display panel of claim 1 , wherein the orthographic projection of the first defining layer on the substrate covers orthographic projection of the raised edge of at least one of the pixel units on the substrate.

5. The display panel of claim 1 , wherein a surface of the second defining layer adjacent to the organic functional layer has a depression, and the depression is used to contain at least a portion of the raised edge of the organic functional layer.

6. The display panel of claim 1 , wherein a through hole is in the conductive isolation region of the second defining layer, and the through hole is filled with an insulating material.

7. The display panel of claim 1 , wherein a through hole is in the conductive isolation region of the second defining layer, a portion of the first defining layer is in the through hole, and the material of the first defining layer is an insulating material.

8. The display panel of claim 1 , wherein an orthographic projection of the second electrode on the substrate covers a portion of the orthographic projection of the organic functional layer on the substrate that is not covered by the orthographic projection of the first defining layer on the substrate.

9. The display panel of claim 1 , wherein a material of the first defining layer is an insulating material; and a material of the second defining layer is any one of an insulating material and a conductive material.

10. A display device, comprising a display panel, wherein the display panel comprises:
a substrate; and
a plurality of pixel units and a pixel defining layer which are on the substrate, each of at least one of the pixel units comprises an organic functional layer, and the organic functional layer has a raised edge; wherein
the pixel defining layer comprises a first defining layer and a second defining layer, the first defining layer is on a side of the second defining layer away from the substrate; and an orthographic projection of the organic functional layer of each pixel unit on the substrate is surrounded by an orthographic projection of the second defining layer on the substrate, an orthographic projection of the first defining layer on the substrate covers the orthographic projection of the second defining layer on the substrate, and the orthographic projection of the first defining layer on the substrate overlaps with an orthographic projection of at least a portion of the raised edge on the substrate,
wherein each of the at least one of the pixel units further comprises a first electrode and a second electrode, the organic functional layer is on a side of the first electrode away from the substrate, and the second electrode is on a side of the first defining layer away from the organic functional layer,
wherein a material of the second defining layer is a conductive material, the second defining layer has a conductive isolation region, and the conductive isolation region is used to isolate first electrodes in any two adjacent pixel units.

11. The display device of claim 10 , wherein the orthographic projection of the first defining layer on the substrate covers orthographic projection of the raised edge of at least one of the pixel units on the substrate.

12. The display device of claim 10 , wherein a surface of the second defining layer adjacent to the organic functional layer has a depression, and the depression is used to contain at least a portion of the raised edge of the organic functional layer.

13. The display device of claim 10 , wherein a through hole is in the conductive isolation region of the second defining layer, a portion of the first defining layer is in the through hole, and the material of the first defining layer is an insulating material.

14. The display device of claim 10 , wherein an orthographic projection of the first electrode of each pixel unit on the substrate is surrounded by the orthographic projection of the second defining layer on the substrate; and a thickness of the second defining layer is more than or equal to the sum of a thickness of the first electrode and a thickness of the organic functional layer.

15. The display device of claim 10 , wherein an orthographic projection of the second electrode on the substrate covers a portion of the orthographic projection of the organic functional layer on the substrate that is not covered by the orthographic projection of the first defining layer on the substrate.

16. A manufacturing method of a display panel, comprising:
forming a plurality of pixel units and a pixel defining layer which are on the substrate;
wherein each of at least one of the pixel units comprises an organic functional layer, and the organic functional layer has a raised edge; the pixel defining layer comprises a first defining layer and a second defining layer, the first defining layer is on a side of the second defining layer away from the substrate; and an orthographic projection of the organic functional layer of each pixel unit on the substrate is surrounded by an orthographic projection of the second defining layer on the substrate, an orthographic projection of the first defining layer on the substrate covers the orthographic projection of the second defining layer on the substrate, and the orthographic projection of the first defining layer on the substrate overlaps with an orthographic projection of at least a portion of the raised edge on the substrate,
wherein each of the at least one of the pixel units further comprises a first electrod

Assignees

• Hefei Xinsheng Optoelectronics Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Xie Xuewu
• Liu Hao
• Ai Yu
• Liu Bowen
• Kong Yubao
• Li Huihui

Classifications

• H10K59/173

  comprising banks or shadow masks · CPC title

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title

• H01L51/56

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic

• H01L2251/5392

  Electricity · mapped topic