Display panel, method for manufacturing the same, and display device

Patent metadata

Field	Value
Publication number	US-12575295-B2
Application number	US-202117921329-A
Country	US
Kind code	B2
Filing date	Nov 9, 2021
Priority date	Apr 19, 2021
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

Provided is a display panel. The display panel includes a substrate; and an insulating layer disposed on the substrate, and an auxiliary electrode, a light-emitting layer, and a cathode layer that are stacked in sequence, the insulating layer being provided with a first via, and the auxiliary electrode and the cathode layer being lapped with each other in the first via; wherein an opening in a side, distal from the substrate, of the first via is of a polygonal shape, and the light-emitting layer forms a broken line at each edge of the opening.

First claim

What is claimed is:

1 . A display panel, comprising:
a substrate; and an insulating layer disposed on the substrate, and an auxiliary electrode, a light-emitting layer, and a cathode layer that are stacked in sequence, the insulating layer being provided with a first via, and the auxiliary electrode and the cathode layer being lapped with each other in the first via; wherein an opening in a side, distal from the substrate, of the first via is of a polygonal shape, and the light-emitting layer forms a broken line at each edge of the opening; wherein the opening comprises at least two strip-shaped sub-openings with extending directions being intersected with each other.

2 . The display panel according to claim 1 , wherein center points of the at least two sub-openings are coincident.

3 . The display panel according to claim 1 , wherein a length of an edge of the opening is less than or equal to 5 μm, and an area of the opening is greater than or equal to 50 μm 2 .

4 . The display panel according to claim 1 , wherein an included angle between a sidewall of the first via and a surface, proximal to the substrate, of the insulating layer ranges from 80 degrees to 90 degrees.

5 . The display panel according to claim 1 , wherein the opening has more than four edges.

6 . The display panel according to claim 1 , further comprising:
an anode layer arranged in a same layer and made from a same material as the auxiliary electrode.

7 . The display panel according to claim 6 , further comprising:
a thin-film transistor electrically connected to the anode layer, and a cathode signal line electrically connected to the auxiliary electrode.

8 . The display panel according to claim 7 , wherein
the thin-film transistor comprises a first electrode electrically connected to the anode layer, the first electrode being one of a source electrode and a drain electrode; and the display panel further comprises a metal light-shielding layer disposed on the substrate and electrically connected to the first electrode.

9 . The display panel according to claim 8 , further comprising:
a pixel defining layer disposed on a side, distal from the substrate, of the insulating layer, wherein the pixel defining layer is configured to define a plurality of pixel regions on the substrate and a non-pixel region disposed on a periphery of the pixel regions, the anode layer is disposed in the pixel regions, and the auxiliary electrode is disposed in the non-pixel region; wherein the insulating layer is further provided with a second via in the non-pixel region, and the anode layer is electrically connected to the first electrode by the second via.

10 . A method for manufacturing a display panel, comprising:
providing a substrate; and forming an insulating layer, an auxiliary electrode, a light-emitting layer, and a cathode layer on the substrate; wherein the insulating layer is provided with a first via, the auxiliary electrode and the cathode layer are lapped with each other in the first via; and an opening in a side, distal from the substrate, of the first via is of a polygonal shape, and the light-emitting layer forms a broken line at each edge of the opening; wherein the opening comprises at least two strip-shaped sub-openings with extending directions being intersected with each other.

11 . A display device, comprising: a power supply assembly and a display panel, wherein power supply assembly is configured to supply power to the display panel, wherein the display panel comprises:
a substrate; and an insulating layer disposed on the substrate, and an auxiliary electrode, a light-emitting layer, and a cathode layer that are stacked in sequence, the insulating layer being provided with a first via, and the auxiliary electrode and the cathode layer being lapped with each other in the first via; wherein an opening in a side, distal from the substrate, of the first via is of a polygonal shape, and the light-emitting layer forms a broken line at each edge of the opening; wherein the opening comprises at least two strip-shaped sub-openings with extending directions being intersected with each other.

12 . The display device according to claim 11 , wherein center points of the at least two sub-openings are coincident.

13 . The display device according to claim 11 , wherein a length of an edge of the opening is less than or equal to 5 μm, and an area of the opening is greater than or equal to 50 μm 2 .

14 . The display device according to claim 11 , wherein an included angle between a sidewall of the first via and a surface, proximal to the substrate, of the insulating layer ranges from 80 degrees to 90 degrees.

15 . The display device according to claim 11 , wherein the opening has more than four edges.

16 . The display device according to claim 11 , wherein the display panel further comprises:
an anode layer arranged in a same layer and made from a same material as the auxiliary electrode.

17 . The display device according to claim 16 , wherein the display panel further comprises:
a thin-film transistor electrically connected to the anode layer, and a cathode signal line electrically connected to the auxiliary electrode.

18 . The display device according to claim 17 , wherein
the thin-film transistor comprises a first electrode electrically connected to the anode layer, the first electrode being one of a source electrode and a drain electrode; and the display panel further comprises a metal light-shielding layer disposed on the substrate and electrically connected to the first electrode.

Assignees

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

Inventors

• Liu Ning
• Wang Qinghe
• Liu Jun
• Yin Hao
• Zhou Bin
• Yan Liangchen

Classifications

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title

• H10K59/124

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

• H10K59/1201 Primary

  Manufacture or treatment · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/126

  Shielding, e.g. light-blocking means over the TFTs · CPC title