OLED panel with a ring shape resin encapsulation material

• US 10,431,770 B2
• Filed: 01/17/2018
• Issued: 10/01/2019
• Est. Priority Date: 12/29/2017
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
• Original Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
• Inventors: Yang, Zhongguo, Li, Jinchuan
• Primary Examiner(s): Chambliss, Alonzo
• Application Number:
  US15/753,799
• Publication Number:
  US 20190207151A1
• Time in Patent Office: 622 Days
• CPC Class Codes: H10K 2102/00 Constructional details relating to the organic devices covered by this subclass
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 77/10 Substrates, e.g. flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

An OLED panel includes a substrate, a cover plate, an organic light-emitting layer arranged between the substrate and the cover plate, a water-blocking layer packing the organic light-emitting layer on a surface of the substrate, and a ring-like composite encapsulating material layer arranged between the substrate and the cover plate. The composite encapsulating material layer surrounds the water-blocking layer. The composite encapsulating material layer and the water-blocking layer are sealed between the substrate and the cover plate. The composite encapsulating material layer is made of a nano-resin material. A method for fabricating the OLED panel is also provided. The nano-resin material with better adhesion and toughness is used as a encapsulating material of the OLED panel to have compactness and properties of blocking water and oxygen, thereby replacing a dam and a getter and realizing a narrow-bezel encapsulation for OLEDs with a large size.

Claims

1. An OLED panel, comprising a substrate, a cover plate, an organic light-emitting layer arranged between the substrate and the cover plate, a water-blocking layer packing the organic light-emitting layer on a surface of the substrate, and a ring-like composite encapsulating material layer arranged between the substrate and the cover plate, the composite encapsulating material layer surrounds the water-blocking layer, and seals the organic light-emitting layer and the water-blocking layer between the substrate and the cover plate, and the composite encapsulating material layer is made of a nano-resin material;

wherein the surface of the substrate is provided with a groove that is arranged at an outer perimeter of the encapsulating layer, and the composite encapsulating material layer fills the groove.

2. The OLED panel according to claim 1, wherein the composite encapsulating material layer is made of nano light-curing resin.

3. The OLED panel according to claim 2, further comprising a filling glue filled between the water-blocking layer and the cover plate, and the filling glue is laminated to the composite encapsulating material layer.

4. The OLED panel according to claim 3, wherein a sidewall of the water-blocking layer is laminated to the composite encapsulating material layer.

5. A method for fabricating an OLED panel, comprising:

providing a substrate and a cover plate;

forming a circle of a composite encapsulating material layer made of a nano-resin material on an upper surface of the cover plate;

forming an organic light-emitting layer on an upper surface of the substrate;

forming at least one water-blocking layer on a surface of the organic light-emitting layer to encapsulate the organic light-emitting layer on the substrate;

laminating the substrate to the cover plate in a vacuum environment and curing the composite encapsulating material layer; and

forming at least one circle of groove arranged at an outer perimeter of the encapsulating layer on an upper surface of the substrate before laminating the substrate to the cover plate in the vacuum environment.

6. The method for fabricating the OLED panel according to claim 5, wherein the water-blocking layer is made of SiNx, SiON, SiOx, or Al₂O₃.

7. The method for fabricating the OLED panel according to claim 5, further comprising a step of coating a filling glue on an upper surface of the cover plate within a region surrounded by the composite encapsulating material layer.

8. The method for fabricating the OLED panel according to claim 7, wherein the composite encapsulating material layer is made of nano light-curing resin.

9. The method for fabricating the OLED panel according to claim 7, wherein the composite encapsulating material layer comprises inorganic nano-particles made of SiO₂ or ZrO₂, and resin matrix, the inorganic nano-particles are uniformly distributed within the resin matrix.