Display device

Patent metadata

Field	Value
Publication number	US-11575109-B2
Application number	US-202117497024-A
Country	US
Kind code	B2
Filing date	Oct 8, 2021
Priority date	Dec 14, 2018
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

A display device capable of reducing a non-display area includes a substrate hole surrounded by light emitting elements, and a moisture penetration preventing layer disposed between an inner dam surrounded by the light emitting elements and the substrate hole. Accordingly, it is possible to prevent damage to light emitting stacks caused by external moisture or oxygen. Since the substrate hole is disposed within an active area, a reduction in non-display area is achieved.

First claim

What is claimed is:

1. A display device comprising:
a substrate with a substrate hole passing through the substrate, the substrate having one or more emission areas and a barrier area between the substrate hole and the one or more emission areas;
a light emitting element disposed on the substrate in the one or more emission areas, the light emitting element comprising a part of a light emitting stack, and wherein at least another part of the light emitting stack is disposed in the barrier area; and
a moisture penetration preventing layer disposed between the light emitting element and the substrate hole, wherein the moisture penetration preventing layer covers a side surface of the another part of the light emitting stack in the barrier area.

2. The display device according to claim 1 , further comprising:
an inner dam disposed between the substrate hole and the light emitting element; and
a blocking groove disposed between the inner dam and the substrate hole while overlapping with the moisture penetration preventing layer, the blocking groove having a reversed taper shape.

3. The display device according to claim 1 , further comprising:
a through hole disposed to surround the substrate hole while passing through the another part of the light emitting stack,
wherein the moisture penetration preventing layer is disposed on side surfaces of the another part of the light emitting stack exposed through the through hole.

4. The display device according to claim 1 , further comprising:
a black layer disposed to cover upper and side surfaces of the moisture penetration preventing layer;
a side cover layer made of a frit-based sealant, the side cover layer covering the moisture penetration preventing layer;
an encapsulation unit disposed on the light emitting element; and
a touch sensor disposed on the encapsulation unit, the touch sensor comprising a touch electrode and a bridge.

5. The display device according to claim 4 , wherein the moisture penetration preventing layer is made of a same material as at least one of the touch electrode or the bridge, and is disposed on a same plane as the at least one of the touch electrode or the bridge.

6. The display device according to claim 4 , further comprising:
a touch buffer film disposed between the touch sensor and the encapsulation unit;
a touch insulating film disposed between the touch electrode and the bridge; and
a side cover layer disposed on the moisture penetration preventing layer while extending from at least one of the touch buffer film or the touch insulating film.

7. The display device according to claim 6 , further comprising:
a bank disposed without covering anode electrodes of the light emitting element such that the anode electrodes are exposed;
a black matrix disposed over the touch sensor while overlapping with the bank; and
a black layer disposed on the upper and side surfaces of the moisture penetration preventing layer.

8. The display device according to claim 7 , wherein the black layer is made of the same material as the black matrix,
wherein the black layer contacts the moisture penetration preventing layer, and
wherein at least one of the touch insulating film or the touch buffer film is disposed between the black layer and the moisture penetration preventing layer.

9. The display device according to claim 1 , further comprising:
a camera module disposed within the substrate hole.

10. The display device according to claim 1 , wherein the moisture penetration preventing layer covers an outer side surface of the another part of the light emitting stack exposed through the substrate hole.

11. The display device according to claim 1 , wherein the moisture penetration preventing layer is formed to have a single-layer structure or a multilayer structure, using at least one of W, Mo, Co, Ag, Al, Cu, MoTi, Ta, or Ti.

12. The display device according to claim 1 , wherein the moisture penetration preventing layer is disposed only in the barrier area.

13. A display device comprising:
a substrate with a substrate hole passing through the substrate, the substrate having one or more emission areas and a barrier area between the substrate hole and the one or more emission areas;
a light emitting elements disposed on the substrate in the one or more emission areas, the light emitting element comprising a part of a light emitting stack, and wherein at least another part of the light emitting stack is disposed in the barrier area;
an encapsulation unit disposed on the light emitting element;
a touch sensor disposed on the encapsulation unit; and
a moisture penetration preventing layer disposed between the light emitting element and the substrate hole, wherein the moisture penetration preventing layer covers a side surface of the another part of the light emitting stack in the barrier area,
wherein the moisture penetration preventing layer is disposed on a same plane as the touch sensor.

14. The display device according to claim 13 , further comprising:
an inner dam disposed between the substrate hole and the light emitting element; and
a blocking groove disposed between the inner dam and the substrate hole while overlapping with the moisture penetration preventing layer, the blocking groove having a reversed taper shape.

15. The display device according to claim 13 , wherein the touch sensor comprises a touch electrode and a bridge, and
wherein the moisture penetration preventing layer is made of a same material as at least one of the touch electrode or the bridge.

16. The display device according to claim 15 , further comprising:
a touch buffer film disposed between the touch sensor and the encapsulation unit;
a touch insulating film disposed between the touch electrode and the bridge; and
a side cover layer disposed on the moisture penetration preventing layer while extending from at least one of the touch buffer film or the touch insulating film;
a bank disposed without covering anode electrodes of the light emitting element such that the anode electrodes are exposed;
a black matrix disposed over the touch sensor while overlapping with the bank; and
a black layer disposed on upper and side surfaces of the moisture penetration preventing layer.

17. The display device according to claim 16 , wherein the black layer is made of a same material as the black matrix, and
wherein the black layer contacts the moisture penetration preventing layer.

18. The display device according to claim 16 , wherein at least one of the touch insulating film or the touch buffer film is disposed between the black layer and the moisture penetration preventing layer.

19. The display device according to claim 13 , further comprising:
a through hole disposed to surround the substrate hole while passing through the another part of the light emitting stack,
a black layer disposed to cover upper and side surfaces of the moisture penetration preventing layer, and
a side cover layer made of a frit-based sealant, the side cover layer covering the moisture penetration preventing layer,
wherein the moisture penetration preventing layer is disposed on side surfaces of the another part of the light emitting stack exposed through the through hole.

20. The display device according to claim 13 , wherein the encapsulation unit comprises;
at least one inorganic encapsulation layer; and
at least one organic encapsulation layer.

21. The display device according to claim 13 , further comprising:
a camera module disposed w

Assignees

• Lg Display Co Ltd

Inventors

• Lee Young-Wook
• Hwang Seon-Hui
• Park Eun-Young
• An Yong-Su
• Cho Woo-Chan
• Lee Sun-Mi
• Park Jong-Han

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/351

  comprising more than three subpixels, e.g. red-green-blue-white [RGBW] · CPC title

• H10K59/87 Primary

  Passivation; Containers; Encapsulations · CPC title