Organic light emitting display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11245093-B2
Application number	US-201815924658-A
Country	US
Kind code	B2
Filing date	Mar 19, 2018
Priority date	Sep 11, 2017
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

An organic light emitting display device may include a flexible substrate, a common layer, and an encapsulation member. An undercut groove may be formed on the flexible substrate. The common layer may be disposed on the flexible substrate, may include an organic light emitting layer, and may be disconnected by the groove. The encapsulation member may be disposed on the common layer, and may cover the common layer.

First claim

What is claimed is:

1. An organic light emitting display device, comprising:
a flexible substrate having a groove, the groove being undercut;
a common layer on the flexible substrate, the common layer including an organic light emitting layer and being disconnected by the groove; and
an encapsulation member on the common layer, the encapsulation member covering the common layer,
wherein the flexible substrate includes a first plastic layer and a first barrier layer on the first plastic layer,
wherein the first plastic layer is undercut at the groove with respect to the first barrier layer,
wherein the first plastic layer is formed of a plastic material,
wherein the first barrier layer is formed of an inorganic material, and
wherein a depth of the groove in the first plastic layer is less than a thickness of the first plastic layer.

2. The organic light emitting display device as claimed in claim 1 , wherein a laser absorption rate of the first plastic layer is greater than a laser absorption rate of the first barrier layer.

3. The organic light emitting display device as claimed in claim 1 , wherein the groove is formed to correspond to an entirety of a thickness of the first barrier layer and a portion of a thickness of the first plastic layer.

4. The organic light emitting display device as claimed in claim 1 , wherein the flexible substrate includes a second plastic layer on the first barrier layer and a second barrier layer on the second plastic layer, and
wherein the second plastic layer is undercut at the groove with respect to the second barrier layer.

5. The organic light emitting display device as claimed in claim 4 , wherein a laser absorption rate of the second plastic layer is greater than a laser absorption rate of the second barrier layer.

6. The organic light emitting display device as claimed in claim 4 , wherein a width of the groove at the second barrier layer is greater than a width of the groove at the first barrier layer.

7. The organic light emitting display device as claimed in claim 4 , wherein each of the first plastic layer and the second plastic layer includes at least one of polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyarylate, polycarbonate (PC), polyetherimide (PEI), or polyether sulfone (PES).

8. The organic light emitting display device as claimed in claim 4 , wherein each of the first barrier layer and the second barrier layer includes at least one of silicon oxide, silicon nitride, or amorphous silicon.

9. The organic light emitting display device as claimed in claim 1 , wherein the common layer includes a first portion disposed outside the groove and a second portion disposed inside the groove, and
wherein the first portion and the second portion are disconnected from each other.

10. The organic light emitting display device as claimed in claim 9 , wherein the encapsulation member covers the first portion of the common layer, the second portion of the common layer, and a surface of the flexible substrate that is exposed by the groove.

11. The organic light emitting display device as claimed in claim 1 , wherein the encapsulation member includes at least one inorganic layer and at least one organic layer.

12. The organic light emitting display device as claimed in claim 11 , wherein the at least one inorganic layer covers a surface of the flexible substrate that is exposed by the groove.

13. The organic light emitting display device as claimed in claim 11 , wherein the at least one organic layer is disposed outside the groove.

14. The organic light emitting display device as claimed in claim 1 , wherein the encapsulation member includes a first inorganic layer on the common layer, a second inorganic layer on the first inorganic layer, and an organic layer between the first inorganic layer and the second inorganic layer.

15. An organic light emitting display device, comprising:
a flexible substrate including a display area, a through area, and a peripheral area, and having a groove in the peripheral area, the groove being undercut;
an organic light emitting element on the display area of the flexible substrate;
a common layer on the peripheral area of the flexible substrate, the common layer being disconnected by the groove; and
an encapsulation member on the organic light emitting element and the common layer,
wherein the flexible substrate includes a first plastic layer and a first barrier layer on the first plastic layer,
wherein the first plastic layer is undercut at the groove with respect to the first barrier layer,
wherein the first plastic layer is formed of a plastic material
wherein the first barrier layer is formed of an inorganic material, and
wherein a depth of the groove in the first plastic layer is less than a thickness of the first plastic layer.

16. The organic light emitting display device as claimed in claim 15 , wherein the peripheral area is disposed between the display area and the through area.

17. The organic light emitting display device as claimed in claim 16 , wherein the peripheral area surrounds the through area, and
wherein the display area surrounds the peripheral area.

18. The organic light emitting display device as claimed in claim 15 , wherein the organic light emitting element includes:
a pixel electrode;
a first organic function layer on the pixel electrode;
an organic light emitting layer on the first organic function layer;
a second organic function layer on the organic light emitting layer; and
a common electrode on the second organic function layer.

19. The organic light emitting display device as claimed in claim 18 , wherein the common layer is an extended portion of at least one of the first organic function layer, the second organic function layer, and the common layer.

20. The organic light emitting display device as claimed in claim 18 , further comprising a capping layer between the organic light emitting element and the encapsulation member,
wherein the common layer is an extended portion of at least one of the first organic function layer, the second organic function layer, the common layer, and the capping layer.

21. A method of manufacturing an organic light emitting display device, comprising:
forming a flexible substrate on a carrier substrate;
forming a groove on the flexible substrate, the groove being undercut;
forming a common layer on the flexible substrate, the common layer including an organic light emitting layer and being disconnected by the groove; and
forming an encapsulation member on the common layer, the encapsulation member covering the common layer,
wherein the flexible substrate includes a first plastic layer and a first barrier layer on the first plastic layer,
wherein the first plastic layer is undercut at the groove with respect to the first barrier layer,
wherein the first plastic layer is formed of a plastic material
wherein the first barrier layer is formed of an inorganic material, and
wherein a depth of the groove in the first plastic layer is less than a thickness of the first plastic layer.

22. The method as claimed in claim 21 , wherein forming the flexible substrate includes:
forming the first plastic layer on the carrier substrate; and
forming the first barrier layer on the first plastic layer.

23. The method as claimed in claim 22 , wherein the groove is integrally formed in the first plastic layer and the first barrier layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Sung Wooyong
• Yoon Seungho
• Cho Wonje
• Choi Wonwoo

Classifications

• H10D84/01 Primary

  Manufacture or treatment · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K50/844 Primary

  Encapsulations · CPC title

• H10K50/80

  Constructional details · CPC title

• H10K59/65

  OLEDs integrated with inorganic image sensors · CPC title