ORGANIC LIGHT-EMITTING DIODE DISPLAY PANEL AND MANUFACTURING METHOD THEREFOR, AND DISPLAY APPARATUS

• US 20190229152A1
• Filed: 01/31/2018
• Published: 07/25/2019
• Est. Priority Date: 06/21/2017
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: WANG, Huifeng
• Granted Patent: US 10,971,551 B2
• Time in Patent Office: Days
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/1315 comprising structures specially adapted for lowering the resistance
• CPC Class Codes: H10K 59/80522 combined with auxiliary electrodes
• CPC Class Codes: H10K 59/80523 Multilayers, e.g. opaque multilayers
• CPC Class Codes: H10K 59/80524 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

An organic light-emitting diode display panel and a manufacturing method therefor, and a display apparatus are provided. The orange light-emitting diode display panel comprises: a base substrate; an anode and an auxiliary electrode arranged on the base substrate, wherein the anode and the auxiliary electrode are insulated from each other, a pixel definition layer arranged on the anode and the auxiliary electrode, wherein the pixel definition layer has a pixel opening region exposing the anode and a via exposing the auxiliary electrode; and the luminescent layer and a cathode sequentially arranged on the pixel definition layer, wherein the cathode is electrically connected to the auxiliary electrode arranged in the via.

Claims

1. An organic light-emitting diode display panel, comprising:

a base substrate;

an anode and an auxiliary electrode arranged on the base substrate, wherein the anode and the auxiliary electrode are insulated from each other;

a pixel definition layer arranged on the anode and the auxiliary electrode, wherein the pixel definition layer comprises a pixel opening region exposing the anode and a via exposing the auxiliary electrode, the pixel opening region makes an obtuse angle between an edge of the pixel definition layer and the anode, and the via makes an acute angle between the edge of the pixel definition layer and the auxiliary electrode; and

a luminescent layer and a cathode sequentially arranged on the pixel definition layer, wherein the cathode is electrically connected to the auxiliary electrode arranged in the via.

2. The display panel according to the claim 1, wherein, the cathode comprises a cathode metal layer in contact with the luminescent layer and a cathode transparent conductive layer arranged on the cathode metal layer;

wherein,

the cathode metal layer arranged in the via is discontinuous from the cathode metal layer arranged on both sides of the via, and the cathode transparent conductive layer arranged in the via is continuous with the cathode transparent conductive layer arranged on both sides of the via, and the cathode transparent conductive layer is filled to the acute angle of the via such that the cathode transparent conductive layer is in contact with the auxiliary electrode in the via.

3. The display panel according to the claim 2, wherein, a thickness of the cathode transparent conductive layer is greater than a thickness of the cathode metal layer.

4. The display panel according to the claim 2, wherein, the cathode metal layer has a thickness of 1 to 30 nm.

5. The display panel according to the claim 2, wherein, the cathode transparent conductive layer has a thickness of 10 to 1000 nm.

6. The display panel according to claim 1, wherein, the auxiliary electrode and the anode have the same material and are arranged in the same layer.

7. An organic light-emitting diode display apparatus, comprising the organic light-emitting diode display panel according to any one of claims 16claim 1.

8. A manufacturing method of an organic light-emitting diode display panel, comprising:

forming patterns of an anode and an auxiliary electrode on a base substrate, wherein the anode and the auxiliary electrode are insulated from each other;

forming a pattern of a pixel definition layer on the anode and the auxiliary electrode, wherein the pixel definition layer includes a pixel opening region exposing the anode and a via exposing the auxiliary electrode, the pixel opening region makes an obtuse angle between an edge of the pixel definition layer and anode, and the via makes an acute angle between the edge of the pixel definition layer and the auxiliary electrode; and

forming a pattern of a luminescent layer and a pattern of a cathode sequentially on the pixel definition layer, wherein the cathode is electrically connected to the auxiliary electrode arranged in the via.

9. The method according to claim 8, wherein, forming a pattern of a pixel definition layer on the anode and the auxiliary electrode is performed by a single-step patterning process, and comprises:

forming the pixel definition layer on the pattern of the anode and the auxiliary electrode;

performing an exposure process on the pixel defining layer by light with a first oblique angel and light with a second oblique angle, respectively, so that the pixel defining layer forms a pattern of the pixel opening region exposing the anode and the via exposing the auxiliary electrode, wherein the pixel opening region makes the obtuse angle between the edge of the pixel definition layer and anode, and the via makes the acute angle between the edge of the pixel definition layer and the auxiliary electrode.

10. The method according to claim 8, wherein, forming the pattern of the luminescent layer and a cathode sequentially on the pixel definition layer, comprises:

forming a pattern of the luminescent layer on the pixel definition layer;

forming a pattern of the cathode metal layer on the pattern of the luminescent, wherein the cathode metal layer in the via is discontinuous with the cathode metal layer on both sides of the via;

forming a pattern of a cathode transparent conductive layer on the cathode metal layer, wherein the cathode comprises a cathode metal layer and a cathode transparent conductive layer, and the cathode transparent conductive layer arranged in the via is continuous with the cathode transparent conductive layer arranged on both sides of the via, and the cathode transparent conductive layer is filled to the acute angle of the via such that the cathode transparent conductive layer is in contact with the auxiliary electrode in the via.

11. The method according to claim 10, wherein, forming the pattern of the cathode metal layer on the pattern of the luminescent layer, comprises:

forming a pattern of the cathode metal layer on the pattern of the luminescent by an evaporation method.

12. The method according to claim 10, wherein, forming a pattern of a cathode transparent conductive layer on the cathode metal layer, comprises:

forming a pattern of a cathode transparent conductive layer on the cathode metal layer, by a sputtering method.

13. The method according to the claim 10, wherein, a thickness of the cathode transparent conductive layer is greater than a thickness of the cathode metal layer.

14. The method according to the claim 10, wherein, the cathode metal layer is formed with a thickness of 1 to 30 nm.

15. The method according to the claim 10, wherein, the cathode transparent conductive layer is formed with a thickness of 10 to 1000 nm.

16. The method according to claim 8, wherein, the auxiliary electrode and the anode have the same material and are arranged in the same layer.