Organic light emitting display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10991909-B2
Application number	US-201916246865-A
Country	US
Kind code	B2
Filing date	Jan 14, 2019
Priority date	Jan 23, 2018
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

An organic light emitting display device includes: a thin film transistor disposed in a display area of a substrate; an insulating layer disposed on the thin film transistor; an organic light emitting element disposed on the insulating layer and connected to the thin film transistor; and an encapsulation layer covering the organic light emitting element. The encapsulation layer includes: a first inorganic layer extending from the organic light emitting element to a non-display area; an organic layer disposed on the first inorganic layer; a second inorganic layer extending from the organic layer to the non-display area; and an organic pattern layer disposed between the first inorganic layer and the second inorganic layer and spaced apart from the organic layer in the non-display area. At least a part of the first inorganic layer and at least a part of the second inorganic layer may contact each other in the non-display area.

First claim

What is claimed is:

1. An organic light emitting display device comprising:
a substrate comprising a display area and a non-display area;
a thin film transistor disposed on the substrate in the display area;
an insulating layer disposed on the thin film transistor;
an organic light emitting element disposed on the insulating layer and connected to the thin film transistor; and
an encapsulation layer covering the organic light emitting element,
wherein the encapsulation layer comprises:
a first inorganic layer disposed on the organic light emitting element and extending from the organic light emitting element to the non-display area;
an organic layer disposed on the first inorganic layer;
a second inorganic layer disposed on the organic layer and extending from the organic layer to the non-display area; and
an organic pattern layer disposed between the first inorganic layer and the second inorganic layer so as to be spaced apart from the organic layer in the non-display area,
wherein at least a part of the first inorganic layer and at least a part of the second inorganic layer contact each other in the non-display area, and
a thickness of the organic pattern layer is smaller than a thickness of the organic layer.

2. The organic light emitting display device of claim 1 , wherein at least a part of the organic pattern layer overlaps the insulating layer in a plan view.

3. The organic light emitting display device of claim 1 , wherein the organic pattern layer comprises a material the same as a material which the organic layer comprises.

4. The organic light emitting display device of claim 1 , wherein the organic layer comprises at least one kind of organic material selected from: acrylic resins, methacrylic resins, isoprene resins, vinyl resins, epoxy resins, urethane resins, cellulose resins, phenylene resins, and imide resins.

5. The organic light emitting display device of claim 1 , wherein the organic pattern layer has a width of about 10 μm or more and the thickness of about 0.1 μm or more.

6. The organic light emitting display device of claim 1 , wherein the first inorganic layer and the second inorganic layer have a equal area in a plan view, and
an area of the organic layer is less than an area of the first inorganic layer and an area of the second inorganic layer.

7. The organic light emitting display device of claim 1 , wherein the first inorganic layer and the second inorganic layer each independently comprises at least one kind of inorganic material selected from: silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, aluminum nitride, aluminum oxynitride, titanium oxide, titanium nitride, tantalum oxide, tantalum nitride, hafnium oxide, hafnium nitride, zirconium oxide, zirconium nitride, cerium oxide, cerium nitride, tin oxide, tin nitride, and magnesium oxide.

8. The organic light emitting display device of claim 1 , further comprising a dam portion disposed in the non-display area of the substrate.

9. The organic light emitting display device of claim 8 , wherein the insulating layer comprises a side portion inclined in a direction toward the dam portion.

10. The organic light emitting display device of claim 9 , wherein the organic pattern layer is disposed between the dam portion and the inclined side portion of the insulating layer.

11. The organic light emitting display device of claim 9 , wherein the organic pattern layer is disposed at an area in which at least a part of the non-display area where the first inorganic layer and the second inorganic layer contact each other and at least a part of the inclined side portion of the insulating layer and the organic pattern layer overlap each other in a plan view.

12. The organic light emitting display device of claim 8 , wherein the dam portion is provided in plural and the plurality of dam portions have different heights.

13. The organic light emitting display device of claim 8 , further comprising a pixel defining layer disposed between the insulating layer and the encapsulation layer, the pixel defining layer defining a pixel area of the organic light emitting element,
wherein the dam portion comprises a material the same as a material which at least one of the insulating layer and the pixel defining layer comprises.

14. The organic light emitting display device of claim 13 , wherein the dam portion comprises:
a first layer comprising a material the same as a material which the insulating layer comprises; and
a second layer on the first layer, the second layer comprising a material the same as a material which the pixel defining layer comprises.

15. An organic light emitting display device comprising:
a thin film transistor disposed on a substrate in a display area, the substrate comprising the display area and a non-display area;
an insulating layer disposed on the thin film transistor, the insulating layer comprising an inclined side portion in the non-display area;
an organic light emitting element disposed on the insulating layer and connected to the thin film transistor; and
an encapsulation layer covering the organic light emitting element,
wherein the encapsulation layer comprises:
a first inorganic layer disposed on the organic light emitting element and extending from the organic light emitting element to the non-display area;
an organic layer disposed on the first inorganic layer to cover a part of the first inorganic layer;
an organic pattern layer disposed on the first inorganic layer, spaced apart from the organic layer, and overlapping at least a part of the inclined side portion of the insulating layer in a plan view; and
a second inorganic layer disposed on the organic layer, extending from the organic layer to the non-display area, covering the organic pattern layer, and contacting the first inorganic layer in the non-display area where the organic layer and the organic pattern layer are not disposed on the first inorganic layer.

16. The organic light emitting display device of claim 15 , wherein the organic pattern layer comprises a material the same as a material which the organic layer comprises.

17. The organic light emitting display device of claim 15 , wherein the first inorganic layer and the second inorganic layer have an equal area in the plan view.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Seol
• Kim Eunah
• Jo Sungchan

Classifications

• H10K59/8731 Primary

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K50/844

  Encapsulations · CPC title

• H10K59/8722 Primary

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title