OLED device encapsulating method and structure, OLED device, and display screen

• US 10,454,065 B1
• Filed: 06/12/2019
• Issued: 10/22/2019
• Est. Priority Date: 06/20/2017
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Huang, Hui
• Primary Examiner(s): Maruf, Sheikh
• Application Number:
  US16/439,658
• Publication Number:
  US 20190312227A1
• Time in Patent Office: 132 Days
• Field of Search: 257 40
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/135 using ink-jet printing

Abstract

A display screen includes an OLED device encapsulating structure that encapsulates an OLED. The OLED device encapsulating structure includes a substrate, a barrier layer formed on the substrate, a surface active layer disposed on the barrier layer, and a buffer layer stacked on the surface active layer. An orthogonal projection of the buffer layer on the barrier layer is coincident with that of the surface active layer on the barrier layer. A composite layer may be further stacked on the buffer.

Claims

1. A display screen, comprising an organic light emitting diode (OLED) device:

wherein the OLED device comprises an OLED device encapsulating structure, which is configured to encapsulate an OLED;

wherein the OLED device encapsulating structure comprises;

a substrate;

a barrier layer formed on the substrate;

a surface active layer disposed on the barrier layer;

a buffer layer stacked on the surface active layer, an orthogonal projection of the buffer layer onto the barrier layer coinciding with that of the surface active layer onto the barrier layer; and

a composite layer stacked on the buffer layer;

wherein the surface active layer is sandwiched between and in direct contact with the barrier layer and the buffer layer and the surface active layer is a material that creates a hydrogen bond with a material of the buffer layer to enhance bonding therebetween.

2. The display screen according to claim 1, wherein the material of the surface active layer is of one of a hydrophilic polymer active material, polyol based salt, and polyol based ethers.

3. The display screen according to claim 2, wherein the surface active layer is formed by inkjet printing.

4. The display screen according to claim 1, wherein the composite layer comprises a first barrier layer and a first buffer layer stacked on the first barrier layer, or a plurality of first barrier layers and a first buffer layer sandwiched between every two first barrier layers, a first one of the plurality of first barrier layers contacting the buffer layer.

5. The display screen according to claim 4, wherein the barrier layer and the first barrier layer are made of an inorganic material.

6. The display screen according to claim 4, wherein the buffer layer and the first buffer layer are made of an organic material.

7. The display screen according to claim 1, wherein the buffer layer is made of a polymeric material.