Display device including a sealing structure

Patent metadata

Field	Value
Publication number	US-12336377-B2
Application number	US-202117511287-A
Country	US
Kind code	B2
Filing date	Oct 26, 2021
Priority date	Oct 27, 2020
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

Discussed is a display device including an array substrate having a display area, a non-display area positioned outside the display area, a light-emitting array, and a sealing structure disposed on the array substrate, wherein the sealing structure seals the light-emitting array, and fixes a plate-shaped reinforcing substrate facing toward the sealing structure to the array substrate, wherein the sealing structure includes a first adhesive layer facing toward the array substrate, a second adhesive layer facing toward the reinforcing substrate, and a barrier layer disposed between the first adhesive layer and the second adhesive layer.

First claim

What is claimed is:

1. A display device comprising:
an array substrate having a base substrate including a display area and a non-display area disposed adjacent to the display area, and a light-emitting array, the light-emitting array including a plurality of light-emissive elements respectively corresponding to a plurality of pixel areas in the display area, wherein the light-emitting array further includes a first side facing toward the base substrate and a second side opposite to the first side;
a plate-shaped reinforcing substrate disposed in a direction of the second side of the light-emitting array; and
a sealing structure disposed on the array substrate to seal the light-emitting array, and configured to fix the plate-shaped reinforcing substrate to the array substrate,
wherein the sealing structure includes:
a first adhesive layer surrounding the second side and both edge sides of the light-emitting array;
a second adhesive layer facing toward the reinforcing substrate; and
a barrier layer disposed between the first and second adhesive layers, and

wherein the barrier layer is made of a metal material, and the metal material includes a metal material selected from Al, Cu, Sn, Ag, Fe, Zn, or an alloy thereof.

2. The display device of claim 1 , wherein the first adhesive layer is made of a polymer material selected from a group consisting of an olefin-based polymer, an epoxy-based polymer, and an acrylate-based polymer, and a mixture containing particles made of a metal material and an inorganic filler made of at least one selected from CaO, MgO, and BaO, and
wherein the second adhesive layer is made of a polymer material free of a carboxyl group.

3. The display device of claim 1 , wherein the barrier layer is made of the metal material having an elongation of greater than approximately 4% and a yield strength value smaller than approximately 360 Mpa.

4. The display device of claim 1 , wherein the barrier layer is made of an inorganic insulating material including silicon oxide (SiOx) or silicon oxynitride (SiONx).

5. The display device of claim 1 , wherein the sealing structure further includes a protective structure facing toward the reinforcing substrate and positioned between the second adhesive layer and the reinforcing substrate, and
wherein the protective structure comprises a protective layer, an adhesive reinforcement film on one face thereof facing toward the second adhesive layer while on another face thereof facing toward one face of the protective layer, and an antistatic coating film on one face thereof facing toward the other face of the protective layer while on another face thereof facing toward the reinforcing substrate is disposed.

6. The display device of claim 5 , wherein the antistatic coating film allows a sheet resistance of the protective layer to be maintained at approximately 1010 Ω/sq.

7. The display device of claim 1 , wherein the sealing structure further includes at least one of:
a first auxiliary barrier layer disposed between the first adhesive layer and the barrier layer and made of an inorganic insulating material; and
a second auxiliary barrier layer disposed between the second adhesive layer and the barrier layer and made of the inorganic insulating material.

8. The display device of claim 1 , wherein the barrier layer has a structure in which a first metal film and a second metal film respectively including different metal materials are stacked sequentially.

9. The display device of claim 1 , wherein the barrier layer has a structure in which a first inorganic insulating film and a second inorganic insulating film respectively including different inorganic insulating materials are stacked sequentially.

10. The display device of claim 1 , further comprising:
a printed circuit board disposed on the reinforcing substrate;
at least one flexible circuit board having one side connected to the printed circuit board and another side connected to a pad disposed in the non-display area of the array substrate; and
a bottom cover configured to accommodate therein the array substrate, the sealing structure, the reinforcing substrate, the at least one flexible circuit board, and the printed circuit board, and coupled to the reinforcing substrate,
wherein the printed circuit board is disposed between the reinforcing substrate and the bottom cover.

11. The display device of claim 10 , wherein one side edge of the sealing structure adjacent to the pad of the array substrate is spaced apart from the pad of the array substrate by a first spacing;
wherein one side edge of the reinforcing substrate adjacent to the pad of the array substrate is spaced apart from the pad of the array substrate by a second spacing greater than the first spacing, and
wherein the reinforcing substrate has a width smaller than a width of the sealing structure so that a portion of a topmost surface of the sealing structure is exposed.

12. The display device of claim 11 , wherein when a thickness of the reinforcing substrate increases, the second spacing by which the reinforcing substrate is spaced apart from one side edge of the sealing structure increases, and
wherein the reinforcing substrate is disposed inwardly from one side edge of the sealing structure.

13. The display device of claim 1 , wherein the array substrate, the sealing structure and the reinforcing substrate are sequentially stacked to form a stepped shape at at least one side of a stack, and
wherein the stepped shape has:
a lower portion as an exposed portion of the non-display area of the array substrate;
a middle portion as an exposed portion of a top face of the sealing structure; and
an upper portion as an exposed top face of the reinforcing substrate.

14. The display device of claim 13 , wherein the top face of the sealing structure is a top face of the second adhesive layer or a top face of a protective structure of the sealing structure disposed on the second adhesive layer.

15. The display device of claim 10 , wherein the bottom cover is coupled to the reinforcing substrate via at least one adhesive pattern disposed between the reinforcing substrate and the bottom cover.

16. A display device comprising:
an array substrate having a display area, a non-display area disposed adjacent to the display area, and a light-emitting array, the light-emitting array including a plurality of light-emissive elements respectively corresponding to a plurality of pixel areas in the display area;
a sealing structure disposed on the array substrate to seal the light-emitting array, and configured to fix a plate-shaped reinforcing substrate facing toward the array substrate, the sealing structure having a multi-layer structure;
a printed circuit board disposed on the reinforcing substrate;
at least one flexible circuit board having one side connected to the printed circuit board and another side connected to a pad disposed in the non-display area of the array substrate; and
a bottom cover configured to accommodate therein the array substrate, the sealing structure, the reinforcing substrate, the at least one flexible circuit board, and the printed circuit board, and coupled to the reinforcing substrate,
wherein at least one layer of the multi-layer structure includes a metal component, and
wherein the printed circuit board is disposed between the reinforcing board and the bottom cover.

17. The display device of claim 16 , wherein the sealing structure includes:
a first adhesive layer facing toward the array substrate;
a second adhesive layer facing toward the reinforcing substrate;

Assignees

• Lg Display Co Ltd

Inventors

• Shin Joohwan
• Kim Dohyung
• Kang Minjoo
• Kim Jinho
• Lim Heechul
• Kim Eunjin
• Cho Kitaek
• Shin Hongdae
• Lee Sinwoo
• Oh Minho
• Choi Jaeho
• Kim Kyounghoon

Classifications

• H10K50/844 Primary

  Encapsulations · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/8794

  Arrangements for heating and cooling · CPC title

• H10K59/874

  including getter material or desiccant · CPC title

• H10K59/873 Primary

  Encapsulations · CPC title