US-12628510-B2 - Display panel and method for manufacturing same, and display device

US12628510B2US 12628510 B2US12628510 B2US 12628510B2US-12628510-B2

Abstract

Provided is a display panel. The display panel includes: a light-emitting structure including a cathode layer and an anode layer, wherein the anode layer includes a first surface and a second surface that are opposite, the second surface facing towards the cathode layer; and the cathode layer includes a second cathode sub-layer including a third surface facing towards the same direction as the first surface, the third surface being lower than the first surface.

Inventors

Chengchung YANG
Weilin LAI

Assignees

CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
BOE TECHNOLOGY GROUP CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20211022
Priority Date: 20210322

Claims (13)

1 . A display panel, comprising: a light-emitting structure comprising a cathode layer, an anode layer, a planarization layer and a source and drain layer, wherein the anode layer comprises a first surface and a second surface that are opposite to each other, the second surface facing towards the cathode layer, and the first surface facing towards the planarization layer; the cathode layer comprises a first cathode sub-layer opposite to the anode layer and a second cathode sub-layer comprising a third surface facing towards the same direction as the first surface, the third surface being lower than the first surface; the anode layer is electrically connected to the source and drain layer upon running through the planarization layer; and the anode layer comprises a plurality of anodes, wherein a first recess is defined in the planarization layer between adjacent anodes, and the second cathode sub-layer is disposed in the first recess, wherein the second cathode sub-layer in the first recess isolates parasitic capacitance between adjacent anodes.
2 . The display panel according to claim 1 , wherein the light-emitting structure further comprises an organic light-emitting layer between the cathode layer and the anode layer, wherein the organic light-emitting layer is configured to emit light under driving of the anode layer and the cathode layer.
3 . The display panel according to claim 2 , wherein the light-emitting structure further comprises an adsorption electrode disposed in the first recess and connected to the organic light-emitting layer.
4 . The display panel according to claim 3 , wherein the adsorption electrode is disposed between the organic light-emitting layer and the source and drain layer, and is connected to the source and drain layer.
5 . The display panel according to claim 1 , wherein the light-emitting structure further comprises a pixel defining layer disposed between the anode layer and the cathode layer and configured to define a light-emitting region, wherein a second recess is defined in the pixel defining layer between adjacent anodes, and the second cathode sub-layer runs through the second recess.
6 . The display panel according to claim 1 , further comprising: a backplane and a package layer that are opposite to each other, wherein the light-emitting structure is disposed between the backplane and the package layer.
7 . A method for manufacturing a display panel, comprising: providing a backplane, and forming a source and drain layer on the backplane; forming a planarization layer on the source and drain layer, wherein a first recess is defined in the planarization layer; forming an anode layer and an adsorption electrode on the planarization layer, wherein the anode layer comprises a first surface and a second surface that are opposite to each other, wherein the first surface faces towards the planarization layer and the adsorption electrode is opposite to the first recess and connected to the source and drain layer; forming a pixel defining layer on the anode layer, and forming a second recess in the pixel defining layer, wherein the second recess corresponds to the first recess; forming an organic light-emitting layer on the pixel defining layer, wherein at least a part of the organic light-emitting layer is disposed in the first recess to be connected to the adsorption electrode; and forming a cathode layer on the organic light-emitting layer, wherein the cathode layer comprises a first cathode sub-layer opposite to the anode layer and a second cathode sub-layer comprising a third surface facing towards the same direction as the first surface, the third surface being lower than the first surface; wherein the anode layer is electrically connected to the source and drain layer upon running through the planarization layer; and the anode layer comprises a plurality of anodes, wherein a first recess is defined in the planarization layer between adjacent anodes, and the second cathode sub-layer is disposed in the first recess, wherein the second cathode sub-layer in the first recess isolates parasitic capacitance between adjacent anodes.
8 . A display device, comprising: a display panel, wherein the display panel comprises: a light-emitting structure comprising a cathode layer, an anode layer, a planarization layer and a source and drain layer, wherein the anode layer comprises a first surface and a second surface that are opposite to each other, the second surface facing towards the cathode layer, and the first surface facing towards the planarization layer; the cathode layer comprises a first cathode sub-layer opposite to the anode layer and a second cathode sub-layer comprising a third surface facing towards the same direction as the first surface, the third surface being lower than the first surface; the anode layer is electrically connected to the source and drain layer upon running through the planarization layer; and the anode layer comprises a plurality of anodes, wherein a first recess is defined in the planarization layer between adjacent anodes, and the second cathode sub-layer is disposed in the first recess, wherein the second cathode sub-layer in the first recess isolates parasitic capacitance between adjacent anodes.
9 . The display device according to claim 8 , wherein the light-emitting structure further comprises an organic light-emitting layer between the cathode layer and the anode layer, wherein the organic light-emitting layer is configured to emit light under driving of the anode layer and the cathode layer.
10 . The display device according to claim 9 , wherein the light-emitting structure further comprises an adsorption electrode disposed in the first recess and connected to the organic light-emitting layer.
11 . The display device according to claim 10 , wherein the adsorption electrode is disposed between the organic light-emitting layer and the source and drain layer, and is connected to the source and drain layer.
12 . The display device according to claim 8 , wherein the light-emitting structure further comprises a pixel defining layer disposed between the anode layer and the cathode layer and configured to define a light-emitting region, wherein a second recess is defined in the pixel defining layer between adjacent anodes, and the second cathode sub-layer runs through the second recess.
13 . The display device according to claim 8 , wherein the display panel further comprises: a backplane and a package layer that are opposite to each other, wherein the light-emitting structure is disposed between the backplane and the package layer.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a U.S. national stage of international application No. PCT/CN2021/125817, filed on Oct. 22, 2021, which claims priority to Chinese Patent Application No. 202110301225.0 filed on Mar. 22, 2021, the disclosures of which are herein incorporated by references in their entireties. TECHNICAL FIELD The present disclosure relates to the field of display technologies, and in particular, relates to a display panel and a method for manufacturing the same, and a display device. BACKGROUND OF THE INVENTION With the improvement of the display resolution, the density of pixels in a display screen becomes higher and higher. SUMMARY OF THE INVENTION Embodiments of the present disclosure provide a display panel and a method for manufacturing the same, and a display device. A display panel according to the embodiments of the present disclosure includes: a light-emitting structure including a cathode layer and an anode layer, wherein the anode layer includes a first surface and a second surface that are opposite, the second surface facing towards the cathode layer; and the cathode layer includes a second cathode sub-layer including a third surface facing towards the same direction as the first surface, the third surface being lower than the first surface. In some embodiments, the light-emitting structure further includes a planarization layer and a source and drain layer, wherein the planarization layer is disposed on a side, distal from the cathode layer, of the anode layer, and the anode layer is electrically connected to the source and drain layer upon running through the planarization layer. In some embodiments, the anode layer includes a plurality of anodes, wherein a first recess is defined in the planarization layer between adjacent anodes, and the second cathode sub-layer is disposed in the first recess. In some embodiments, the light-emitting structure further includes an organic light-emitting layer between the cathode layer and the anode layer, wherein the organic light-emitting layer is configured to emit light under driving of the anode layer and the cathode layer. In some embodiments, the light-emitting structure further includes an adsorption electrode disposed in the first recess and connected to the organic light-emitting layer. In some embodiments, the adsorption electrode is disposed between the organic light-emitting layer and the source and drain layer, and is connected to the source and drain layer. In some embodiments, the cathode layer further includes a first cathode sub-layer opposite to the anode layer. In some embodiments, the light-emitting structure further includes a pixel defining layer disposed between the anode layer and the cathode layer and configured to define a light-emitting region, wherein a second recess is defined in the pixel defining layer between adjacent anodes, and the second cathode sub-layer runs through the second recess. In some embodiments, the display panel further includes: a backplane and a package layer that are opposite, wherein the light-emitting structure is disposed between the backplane and the package layer. A method for manufacturing a display panel according to the embodiments of the present disclosure includes: providing a backplane, and forming a source and drain layer on the backplane;forming a planarization layer on the source and drain layer, wherein a first recess is defined in the planarization layer;forming an anode layer and an adsorption electrode on the planarization layer, wherein the anode layer includes a first surface and a second surface that are opposite, and the adsorption electrode is opposite to the first recess and connected to the source and drain layer;forming a pixel defining layer on the anode layer, and forming a second recess in the pixel defining layer, wherein the second recess corresponds to the first recess;forming an organic light-emitting layer on the pixel defining layer, wherein at least a part of the organic light-emitting layer is disposed in the first recess to be connected to the adsorption electrode; andforming a cathode layer on the organic light-emitting layer, wherein the cathode layer includes a second cathode sub-layer including a third surface facing towards the same direction as the first surface, the third surface being lower than the first surface. A display device according to the embodiments of the present disclosure includes the display panel in any one of the above embodiments. Additional aspects and technical effects of the embodiments of the present disclosure are shown in the following descriptions, some of which are obvious from the following descriptions, or understood by embodiments of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS Above and/or additional aspects and technical effects of the present disclosure are obvious and easily understood based on the descriptions of the embodiments in conjunction with the accompanying drawings. FIG. 1