Organic display device and manufacturing method

Patent metadata

Field	Value
Publication number	US-9349974-B2
Application number	US-201214125792-A
Country	US
Kind code	B2
Filing date	Oct 30, 2012
Priority date	Jul 10, 2012
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

An organic display device and a manufacturing method are disclosed. The organic display device comprises: an organic light-emitting layer ( 15 ) located between an anode layer ( 13 ) and a cathode layer ( 14 ), and the organic light-emitting layer ( 15 ) comprises a plurality of pore-walls ( 16 ) formed of an organic material and a plurality of pores ( 17 ) to be filled with an organic light-emitting material ( 18 ). By delimiting the space of an organic light-emitting layer ( 15 ) into a plurality of pores ( 17 ), with each pore ( 17 ) occupying a smaller area of a pixel, the method reduces the inkjet-printing area, and increases the process tolerance of an inkjet-printing process, and further the method makes the inkjet-printing technology less dependent on the pixel size, shape, and other design factors, and thus the freedom degree of position-alignment becomes greater.

First claim

The invention claimed is:

1. An organic display device, comprising:
a plurality of pixels and a separating bank, wherein the pixels are mutually separated by the separating bank, and each pixel comprises: an anode layer, a cathode layer, and an organic light-emitting layer located between the anode layer and the cathode layer, wherein the organic light-emitting layer comprises: a plurality of pore-walls formed of an organic material, and a plurality of pores to be filled with an organic light-emitting material, of which two adjacent pores being delimited by the pore-wall.

2. The organic display device according to claim 1 , wherein a thickness of the pore-wall formed of the organic material between two adjacent pores is 30˜150 nm.

3. The organic display device according to claim 1 wherein a height of the pore-walls formed of the organic material is equal to a distance between the cathode layer and the anode layer.

4. The organic display device according to claim 1 , wherein a dimension of the inner-diameter of the pores filled with the organic light-emitting material is 10 nm˜20 μm.

5. The organic display device according to claim 1 , wherein a dimension of the inner-diameter of the pores filled with the organic light-emitting material is 2 μm˜5 μm.

6. The organic display device according to claim 3 , wherein the organic material includes one or more selected from polymethacrylates, acrylate, and polycarbonate.

7. A method of manufacturing an organic display device, comprising:
forming a separating bank to divide the organic display device into a plurality of pixels that are mutually separated, between the anode layer and the cathode layer of each pixel, forming an organic light-emitting layer with a porous structure by a process, wherein the organic light-emitting layer comprises a plurality of pore-walls formed of an organic material and a plurality of pores, of which two adjacent pores being delimited by the pore-wall; and
filling an organic light-emitting material into the pores.

8. The method according to claim 7 , wherein filling an organic light-emitting material into the pores comprises:
spraying an organic light-emitting material into the plurality of pores contained in the organic light-emitting layer;
drying the sprayed organic light-emitting material, and
determining whether the thickness of the dried sprayed organic light-emitting material in the pores is equal to the height of the pore-walls constructed of a porous material, if it is not equal, proceeding with the spraying operation, until the thickness of the dried sprayed organic light-emitting material in the pores is equal to the height of the pore-walls constructed of the porous material.

9. The method according to claim 8 , wherein the number of times of spraying the organic light-emitting material is at least twice.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Huang Wei
• Wang Dawei

Classifications

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title

• H10K71/12 Primary

  using liquid deposition, e.g. spin coating · CPC title

• H01L51/0035

  Electricity · mapped topic

• H01L51/004

  Electricity · mapped topic

• H01L51/5012 Primary

  Electricity · mapped topic