Light-emitting device and manufacturing method thereof, display panel and manufacturing method thereof, and display apparatus

Patent metadata

Field	Value
Publication number	US-12550573-B2
Application number	US-202117798326-A
Country	US
Kind code	B2
Filing date	Sep 13, 2021
Priority date	Oct 21, 2020
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A light-emitting device includes a first electrode, a light-emitting function pattern and a second electrode. The first electrode has at least one first depression portion. The light-emitting function pattern is disposed on the first electrode, the light-emitting function pattern covers at least the first depression portion(s), and a portion of the light-emitting function pattern covering a first depression portion is conformal to the first depression portion.

First claim

What is claimed is:

1 . A display panel, comprising at least one light-emitting device wherein a light-emitting device of the at least one light-emitting device comprises:
a first electrode having at least one first depression portion; a light-emitting function pattern disposed on the first electrode, the light-emitting function pattern covering at least the at least one first depression portion, and a portion of the light-emitting function pattern covering a first depression portion being conformal to the first depression portion; wherein the at least one light-emitting device includes a plurality of light-emitting devices; and the display panel further comprises a pixel defining layer disposed on first electrodes of the plurality of light-emitting devices, wherein the pixel defining layer is configured to define a position of the light-emitting function pattern, the pixel defining layer includes a plurality of hollows, and a hollow in the plurality of hollows exposes at least the at least one first depression portion of the first electrode.

2 . The display panel according to claim 1 , wherein in a thickness direction of the light-emitting device, an edge of a longitudinal section of the first depression portion proximate to the light-emitting function pattern includes an arc line and/or polyline.

3 . The display panel according to claim 2 , wherein a surface of the first depression portion proximate to the light-emitting function pattern has a depression; and in the thickness direction of the light-emitting device, a section of the depression of the surface of the first depression portion is in a shape of any one of a semicircle, a semi-ellipse, an inverted triangle, an inverted trapezoid and a rectangle.

4 . The display panel according to claim 1 , further comprising a second electrode disposed opposite to the first electrode, the light-emitting function pattern being located between the first electrode and the second electrode.

5 . The display panel according to claim 1 , wherein the display panel has a plurality of sub-pixels emitting light of different colors; and in the sub-pixels, at least part of sub-pixels emitting blue light each include a light-emitting device in the at least one light-emitting device.

6 . The display panel according to claim 1 , wherein
the display panel further comprises a planarization layer disposed on a side of first electrodes of the plurality of light-emitting devices away from light-emitting function patterns of the plurality of light-emitting devices, wherein the planarization layer includes a plurality of second depression portions, the first depression portion is located on a second depression portion in the plurality of second depression portions, and a surface of the first depression portion proximate to the second depression portion is conformal to a surface of the second depression portion proximate to the first depression portion.

7 . The display panel according to claim 6 , wherein the planarization layer is made of a photosensitive material.

8 . The display panel according to claim 1 , wherein second electrodes of the light-emitting devices are coupled.

9 . A display apparatus, comprising the display panel according to claim 1 .

10 . A manufacturing method of a display panel, comprising:
forming a first electrode layer, the first electrode layer including a plurality of first electrodes, and each first electrode in the plurality of first electrodes having at least one first depression portion; and forming a light-emitting function layer on the first electrode layer, wherein the light-emitting function layer includes a plurality of light-emitting function patterns, a light-emitting function pattern in the plurality of light-emitting function patterns covers at least the at least one first depression portion of a first electrode, and a portion of the light-emitting function pattern covering a first depression portion is conformal to the first depression portion; wherein after forming the first electrode layer, the manufacturing method further comprises: forming a pixel defining layer on the plurality of first electrodes, wherein the pixel defining layer is configured to define a position of the light-emitting function pattern, the pixel defining layer includes a plurality of hollows, and a hollow in the plurality of hollows exposes at least the at least one first depression portion of the first electrode.

11 . The manufacturing method of the display panel according to claim 10 , before forming the first electrode layer, the manufacturing method further comprising:
forming a planarization layer, wherein the planarization layer includes a plurality of second depression portions, the first depression portion is located on a second depression portion in the plurality of second depression portion, and a surface of the first depression portion proximate to the second depression portion is conformal to a surface of the second depression portion proximate to the first depression portion.

12 . The manufacturing method of the display panel according to claim 11 , wherein forming the planarization layer includes:
forming a planarization film of a photosensitive material, and patterning the planarization film to form the planarization layer including the plurality of second depression portions.

13 . The manufacturing method of the display panel according to claim 12 , wherein patterning the planarization film to form the planarization layer including the plurality of second depression portions, includes:
exposing regions of the planarization film where the second depression portions are to be formed, wherein in an exposure process, an exposure time for a middle region in each region where the second depression portion is to be formed is longer than an exposure time for an edge region except for the middle region in the region where the second depression portion is to be formed; or an exposure intensity for the middle region in each region where the second depression portion is to be formed is greater than an exposure intensity for the edge region except for the middle region in the region where the second depression portion is to be formed.

14 . The manufacturing method of the display panel according to claim 10 , after forming the light-emitting function layer, the method further comprising:
forming a second electrode layer on the light-emitting function layer, the second electrode layer being opposite to the first electrode layer.

15 . The manufacturing method of the display panel according to claim 10 , wherein in a thickness direction of the display panel, an edge of a longitudinal section of the first depression portion proximate to the light-emitting function layer includes an arc line and/or polyline.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Sun Meng
• Han Cheng
• Xu Shuyun
• Du Xiaobo
• Li Yansong

Classifications

• H10K59/60

  OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes · CPC title

• H10K71/00

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

• H10K59/122

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

• H10K50/125

  specially adapted for multicolour light emission, e.g. for emitting white light · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title