Display panel and display device

Patent metadata

Field	Value
Publication number	US-12543441-B2
Application number	US-202117285108-A
Country	US
Kind code	B2
Filing date	Mar 23, 2021
Priority date	Feb 9, 2021
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

Abstract

A display panel and a display device are provided. The display panel includes a first display region and a second display region. A light transmittance rate of the first display region is greater than a light transmittance rate of the second display region. In the first display region, the display panel includes pixel regions and light transmissive regions between the pixel regions. The display panel includes: a pixel definition layer defined with at least one light transmissive hole, wherein the light transmissive hole is located in the corresponding light transmissive region; an auxiliary layer located in the light transmissive hole; and a first electrode layer located on the auxiliary layer.

First claim

What is claimed is:

1 . A display panel, comprising a first display region and a second display region, wherein a light transmittance rate of the first display region is greater than a light transmittance rate of the second display region; in the first display region, the display panel comprises pixel regions and light transmissive regions between the pixel regions; and the display panel comprises:
a pixel definition layer defined with at least one light transmissive hole, wherein the light transmissive hole is located in the corresponding light transmissive region; an auxiliary layer comprising at least one auxiliary portion, wherein the auxiliary portion is located in the corresponding light transmissive hole; and a first electrode layer located on the auxiliary layer; wherein the display panel further comprises a transparent filling layer, and the transparent filling layer is filled in the light transmissive hole and is located on the first electrode layer; wherein a material of the transparent filling layer is a transparent organic material with a light transmittance rate greater than 95%.

2 . The display panel as claimed in claim 1 , wherein the light transmissive hole comprises a top opening, a bottom opening, and a lateral wall, and a size of the top opening is larger than a size of the bottom opening.

3 . The display panel as claimed in claim 2 , wherein the display panel further comprises a second electrode layer; the pixel definition layer is disposed on the second electrode layer; the second electrode layer comprises a plurality of second electrodes; each of the second electrodes is located in the corresponding pixel regions;
and a distance between an outer edge of the lateral wall at the bottom opening and an outer edge of an adjacent second electrode ranges from 2 to 5 microns.

4 . The display panel as claimed in claim 3 , wherein the display panel further comprises a light emitting unit layer; the light emitting unit layer comprises a first light emitting unit layer, a second light emitting unit layer, and a third light emitting unit layer disposed in a stack; the second light emitting unit layer is disposed between the first light emitting unit layer and the third light emitting unit layer; the pixel definition layer comprises a pixel opening corresponding to each of the second electrodes; the first light emitting unit layer is disposed on the pixel definition layer, covers the pixel opening and the light transmissive hole, and is located below the auxiliary layer; the second light emitting unit layer is disposed in the pixel opening; and
the third light emitting unit layer covers the second light emitting unit layer and the first light emitting unit layer and is located below the auxiliary layer.

5 . The display panel as claimed in claim 4 , wherein the first electrode layer covers at least a part of regions of the third light emitting unit layer and the auxiliary portion.

6 . The display panel as claimed in claim 5 , wherein a thickness of the first electrode layer on the auxiliary layer is less than a thickness of the first electrode layer on the light emitting unit layer.

7 . The display panel as claimed in claim 2 , wherein the auxiliary portion covers the corresponding bottom opening of the light transmissive hole.

8 . The display panel as claimed in claim 7 , wherein the auxiliary portion comprises a platform portion and an edge portion located at an edge of the platform portion; a thickness of the edge portion gradually decreases along a direction away from the platform portion; and the first electrode layer at least covers part of the edge portion.

9 . The display panel as claimed in claim 8 , wherein a thickness of the first electrode layer gradually decreases on the edge portion in a direction in which the thickness of the edge portion increases.

10 . The display panel as claimed in claim 9 , wherein the first electrode layer covers part of the edge portion.

11 . The display panel as claimed in claim 9 , wherein the first electrode layer completely covers the edge portion.

12 . The display panel as claimed in claim 9 , wherein the first electrode layer completely covers the auxiliary layer.

13 . The display panel as claimed in claim 7 , wherein the auxiliary layer covers part of the lateral wall of the light transmissive hole.

14 . The display panel as claimed in claim 1 , wherein the transparent organic material comprises poly (methyl methacrylate).

15 . A display device, comprising a display panel, wherein the display panel comprises a first display region and a second display region; a light transmittance rate of the first display region is greater than a light transmittance rate of the second display region; in the first display region, the display panel comprises pixel regions and light transmissive regions between the pixel regions; and the display panel comprises:
a pixel definition layer defined with at least one light transmissive hole, wherein the light transmissive hole is located in the corresponding light transmissive region; an auxiliary layer comprising at least one auxiliary portion, wherein the auxiliary portion is located in the corresponding light transmissive hole; and a first electrode layer located on the auxiliary layer, wherein the first electrode layer covers at least part of a lateral wall of the light transmissive hole; wherein the display panel further comprises a transparent filling layer, and the transparent filling layer is filled in the light transmissive hole and is located on the first electrode layer; and wherein a material of the transparent filling layer is a transparent organic material with a light transmittance rate greater than 95%.

16 . The display device as claimed in claim 15 , wherein the light transmissive hole comprises a top opening, a bottom opening, and the lateral wall, and a size of the top opening is larger than a size of the bottom opening.

17 . The display device as claimed in claim 16 , wherein the display panel further comprises a second electrode layer; the pixel definition layer is disposed on the second electrode layer; the second electrode layer comprises a plurality of second electrodes; each of the second electrodes is located in the corresponding pixel regions;
and a distance between an outer edge of the lateral wall at the bottom opening and an outer edge of an adjacent second electrode ranges from 2 to 5 microns.

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Jin Meng
• Lv Lei
• Yuan Tao
• Huang Jinchang

Classifications

• H10K59/65

  OLEDs integrated with inorganic image sensors · CPC title

• H10K59/122 Primary

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

• H10K59/80521

  characterised by their shape · CPC title

• H10K59/121

  characterised by the geometry or disposition of pixel elements · CPC title