Organic light emitting diode display panel and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-10170526-B1
Application number	US-201715575631-A
Country	US
Kind code	B1
Filing date	Oct 19, 2017
Priority date	Aug 16, 2017
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

An organic light emitting diode (OLED) display panel and a method for manufacturing the OLED display panel are provided. The OLED display panel includes a thin film transistor layer, an anode layer, a pixel definition layer, a cathode layer, and a barrier layer. The barrier layer is disposed on the pixel definition layer between any two adjacent anodes. The barrier layer blocks an electrical charge released by one of the two adjacent anodes from entering into a region in the cathode layer corresponding to the other of the two adjacent anodes.

First claim

What is claimed is:

1. An organic light emitting diode (OLED) display panel, comprising:
a thin film transistor layer;
an anode layer formed on the thin film transistor layer, the anode layer comprising at least two arrays of anodes arranged in an array;
a pixel definition layer formed on the thin film transistor layer, the pixel definition layer comprising a plurality of sub-pixel openings, wherein the sub-pixel openings and the anodes are aligned with each other; and
a barrier layer disposed on the pixel definition layer between any two of the anodes adjacent to each other, wherein the barrier layer is configured to block an electrical charge released by one of the two adjacent anodes from entering into a region in a cathode layer corresponding to the other of the two adjacent anodes;
wherein a height of the barrier layer in a direction perpendicular to a plane of the OLED display panel is greater than a height of a sum of a first common layer, a second common layer, and the cathode layer.

2. The OLED display panel according to claim 1 , wherein the OLED display panel further comprises:
the first common layer formed on the pixel definition layer, wherein the pixel definition layer and the anode layer are completely covered by the first common layer;
a light emitting layer formed on the first common layer, wherein the light emitting layer comprises at least two light emitting units corresponding to the sub-pixel openings;
the second common layer formed on the first common layer, wherein the light emitting layer and the first common layer are completely covered by the second common layer; and
the cathode layer formed on the second common layer.

3. The OLED display panel according to claim 2 , wherein the first common layer comprises a hole injection layer and a hole transport layer, and the second common layer comprises an electron injection layer and an electron transport layer.

4. The OLED display panel according to claim 1 , wherein the barrier layer comprises two first short sides parallel to each other and a first long side remote from a sub-pixel layer; and
a length of the first long side is smaller than a width of the pixel definition layer between adjacent pixels.

5. A method for manufacturing an organic light emitting diode (OLED) display panel, comprising steps of:
a step S 40 of forming a pixel definition layer on a first substrate;
a step S 50 of forming at least two sub-pixel openings in the pixel definition layer corresponding to anodes;
a step S 60 of forming a barrier layer on the pixel definition layer between any two of the anodes adjacent to each other;
a step S 70 of forming a first common layer on the pixel definition layer;
a step S 80 of forming at least two light emitting units on the first common layer corresponding to the sub-pixel openings; and
a step S 90 of forming a second common layer and a cathode layer on the first common layer sequentially.

6. The method according to claim 5 , wherein before the step S 40 , the method further comprises steps of:
a step S 10 of forming a thin film transistor layer on the first substrate;
a step S 20 of forming an anode layer on the thin film transistor layer; and
a step S 30 of forming the anode layer to include at least two arrays of anodes arranged in an array.

7. The method according to claim 5 , wherein the barrier layer is configured to block an electrical charge released by one of the two adjacent anodes from entering into a region in the cathode layer corresponding to the other of the two adjacent anodes; and
a height of the barrier layer in a direction perpendicular to a plane of the OLED display panel is greater than a height of a sum of the first common layer, the second common layer, and the cathode layer.

8. The method according to claim 5 , wherein the barrier layer comprises two first short sides parallel to each other and a first long side remote from a sub-pixel layer; and
a length of the first long side is smaller than a width of the pixel definition layer between adjacent pixels.

9. The method according to claim 5 , wherein the first common layer comprises a hole injection layer and a hole transport layer, and the second common layer comprises an electron injection layer and an electron transport layer.

10. An organic light emitting diode (OLED) display panel, comprising:
a thin film transistor layer;
an anode layer formed on the thin film transistor layer, the anode layer comprising at least two arrays of anodes arranged in an array;
a pixel definition layer formed on the thin film transistor layer, the pixel definition layer comprising a plurality of sub-pixel openings, wherein the sub-pixel openings and the anodes are aligned with each other; and
a barrier layer disposed on the pixel definition layer between any two of the anodes adjacent to each other, and the barrier layer is configured to block an electrical charge released by one of the two adjacent anodes from entering into a region in a cathode layer corresponding to the other of the two adjacent anodes.

11. The OLED display panel according to claim 10 , wherein the OLED display panel further comprises:
a first common layer formed on the pixel definition layer, wherein the pixel definition layer and the anode layer are completely covered by the first common layer;
a light emitting layer formed on the first common layer, wherein the light emitting layer comprises at least two light emitting units corresponding to the sub-pixel openings;
a second common layer formed on the first common layer, wherein the light emitting layer and the first common layer are completely covered by the second common layer; and
the cathode layer formed on the second common layer.

12. The OLED display panel according to claim 11 , wherein the first common layer comprises a hole injection layer and a hole transport layer, and the second common layer comprises an electron injection layer and an electron transport layer.

13. The OLED display panel according to claim 10 , wherein the barrier layer comprises two first short sides parallel to each other and a first long side remote from a sub-pixel layer; and
a length of the first long side is smaller than a width of the pixel definition layer between adjacent pixels.

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Yang Jie

Classifications

• H01L27/3211

  Electricity · mapped topic

• H01L51/52

  Electricity · mapped topic

• H01L27/3246 Primary

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic

• H10K59/80521

  characterised by their shape · CPC title