Array Substrate, Method for Manufacturing the Same and Display Device

Patent metadata

Field	Value
Publication number	US-2019067390-A1
Application number	US-201815989681-A
Country	US
Kind code	A1
Filing date	May 25, 2018
Priority date	Aug 24, 2017
Publication date	Feb 28, 2019
Grant date	—

Abstract

The present invention provides an array substrate, a method for manufacturing the same and a display device. The array substrate includes a substrate; a anode layer and a pixel defining layer on the substrate; an auxiliary cathode layer on the pixel defining layer; a spacer layer on the auxiliary cathode layer; an organic light-emitting layer covering the anode layer, the pixel defining layer, and the spacer layer; a cathode layer covering the organic light-emitting layer, wherein the cathode layer laps with the auxiliary cathode layer on the pixel defining layer. Since the auxiliary cathode layer disposed on the pixel defining layer corresponds to the non-display area, the material with low resistivity can be selected for the auxiliary cathode layer. Thus the uniformity of the display brightness and the like of the screen can be improved, thereby improving the display quality of the screen.

First claim

1 . An array substrate, comprising:
a substrate; an anode layer and a pixel defining layer on the substrate; an auxiliary cathode layer on the pixel defining layer; a spacer layer on the auxiliary cathode layer; an organic light-emitting layer covering the anode layer, the pixel defining layer, and the spacer layer; and a cathode layer covering the organic light-emitting layer; wherein the cathode layer laps with the auxiliary cathode layer on the pixel defining layer.

2 . The array substrate according to claim 1 , wherein an orthogonal projection of the pixel defining layer on the substrate covers an orthogonal projection of the auxiliary cathode layer and the spacer layer on the substrate;
the pixel defining layer divides a plurality of pixel units arranged in an array on the substrate, and in a direction of a connecting-line of centers of adjacent pixel units, the orthogonal projection of the spacer layer on the substrate covers the orthogonal projection of the auxiliary cathode layer on the substrate.

3 . The array substrate according to claim 2 , wherein the spacer layer includes a plurality of spacer columns on the auxiliary cathode layer, a cross section of the spacer columns along a first direction is an inverted trapezoid, and the first direction is the direction of a connecting-line of centers of adjacent pixel units, wherein the short side of the inverted trapezoid is adjacent to the auxiliary cathode layer.

4 . The array substrate according to claim 3 , wherein the array substrate further comprises an insulating layer formed between the auxiliary cathode layer and the organic light-emitting layer, the insulating layer is on an area of the auxiliary cathode layer that is not covered by the spacer columns.

5 . The array substrate according to claim 1 , wherein the material of the auxiliary cathode layer is a metal conductive material, and the thickness of the auxiliary cathode layer is 100-700 nm.

6 . The array substrate according to claim 1 , wherein the thickness of the spacer layer is 0.2-4 μm.

7 . A display device, comprising the array substrate according to claim 1 .

8 . A display device, comprising the array substrate according to claim 2 .

9 . A display device, comprising the array substrate according to claim 3 .

10 . A display device, comprising the array substrate according to claim 4 .

11 . A display device, comprising the array substrate according to claim 5 .

12 . A display device, comprising the array substrate according to claim 6 .

13 . A method for manufacturing the array substrate according to claim 1 , comprising:
providing the substrate; forming the anode layer and the pixel defining layer on the substrate by patterning; forming the auxiliary cathode layer on the pixel defining layer; forming the spacer layer on the auxiliary cathode layer; forming the organic light-emitting layer on the anode layer, the pixel defining layer, and the spacer layer by covering; and forming the cathode layer on the organic light-emitting layer; wherein the cathode layer laps with the auxiliary cathode layer on the pixel defining layer.

14 . The method according to claim 13 , wherein the step of forming the organic light-emitting layer by covering comprises:
forming the organic light-emitting layer by thermal evaporation or inkjet printing so that the organic light-emitting layer is broken at an area on the pixel defining layer adjacent the auxiliary cathode layer, and disconnected from the auxiliary cathode layer.

15 . The method according to claim 13 , wherein the step of forming the cathode layer comprises:
forming the cathode layer by a sputtering process so that the cathode layer laps with the auxiliary cathode layer on the pixel defining layer.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Gao Xinwei

Classifications

• H01L51/5228

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic

• H01L27/3246 Primary

  Electricity · mapped topic

• H10K59/80522

  combined with auxiliary electrodes · CPC title

• H10K59/122

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