ORGANIC DISPLAY DEVICE AND MANUFACTURING METHOD

• US 20150200380A1
• Filed: 10/30/2012
• Published: 07/16/2015
• Est. Priority Date: 07/10/2012
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Huang, Wei, Wang, Dawei
• Granted Patent: US 9,349,974 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/12 using liquid deposition, e.g. spin coating
• CPC Class Codes: H10K 85/111 comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
• CPC Class Codes: H10K 85/141 comprising aliphatic or olefinic chains, e.g. poly N-vinylcarbazol, PVC or PTFE
• CPC Class Codes: H10K 85/60 Organic compounds having low molecular weight H10K85/10 - H10K85/50 take precedence

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.

Claims

1. An organic display device, comprising:

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 μ

m.

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 μ

m˜

5 μ

m.

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:

between the anode layer and the cathode layer, 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.