Flexible organic light emitting display device

Patent metadata

Field	Value
Publication number	US-10021741-B2
Application number	US-201514870948-A
Country	US
Kind code	B2
Filing date	Sep 30, 2015
Priority date	Sep 30, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

Provided is a flexible organic light emitting display device including a pixel area and a bezel area that includes a first inorganic encapsulation layer on an organic light emitting element of the pixel area; a second inorganic encapsulation layer that is relatively flatter than the first inorganic encapsulation layer and encapsulates a plurality of foreign matter compensation layers by contacting the first inorganic encapsulation layer in the bezel area; and a foreign matter compensation layer structure in which the plurality of foreign matter compensation layers are stacked between the first inorganic encapsulation layer and the second inorganic encapsulation layer.

First claim

What is claimed is:

1. A self-emission type of display device comprising:
a light emitting element including an anode and a cathode facing each other, and a light emission layer interposed between the anode and the cathode;
a first inorganic layer on the light emitting element, configured to protect the light emitting element from at least one of oxygen and moisture;
an organic structure on the first inorganic layer, included a first organic layer and a second organic layer on the first organic layer; and
a second inorganic layer on the second organic layer, configured to encapsulate the organic structure by covering upper and side surface of the organic structure,
wherein an end of the first inorganic layer and an end of the second inorganic layer is disposed more outside than an end of the first organic layer and an end of the second organic layer,
wherein a carbon content of the first organic layer is larger than a carbon content of the second organic layer, and
wherein the first organic layer has a first hardness and the second organic layer has a second hardness relatively higher than the first hardness.

2. The self-emission type of display device according to claim 1 ,
wherein the second organic layer is configured to protect the first organic layer from plasma damage during a manufacturing process of the second inorganic layer.

3. The self-emission type of display device according to claim 1 ,
wherein the carbon content of the first organic layer is within a range of 30% to 50% and the carbon content of the second organic layer is within a range of 5% to 30%.

4. The self-emission type of display device according to claim 1 ,
wherein the first organic layer and the second organic layer are configured of a silicon oxycarbon (SiOC) having different carbon contents.

5. The self-emission type of display device according to claim 4 , further comprising:
a planarization foreign matter compensation layer disposed on the second inorganic layer.

6. The self-emission type of display device according to claim 4 , further comprising:
a planarization foreign matter compensation layer disposed between the second inorganic layer and the second organic layer.

7. A self-emission type of display device comprising:
a light emitting element including an anode and a cathode facing each other, and a light emission layer interposed between the anode and the cathode;
a first inorganic layer on the light emitting element, configured to protect the light emitting element from at least one of oxygen and moisture;
an organic structure on the first inorganic layer, included a first organic layer and a second organic layer on the first organic layer; and
a second inorganic layer on the second organic layer, configured to encapsulate the organic structure by covering upper and side surface of the organic structure,
wherein the first organic layer is configured of a silicon oxycarbon (SiOC) and the second organic layer is configured of an acryl resin, a silicon resin, or an epoxy resin, and a thickness of the second organic layer is relatively larger than a thickness of the first organic layer.

8. The self-emission type of display device according to claim 7 , further comprising:
a planarization foreign matter compensation layer disposed on the second inorganic layer.

9. The self-emission type of display device according to claim 7 , further comprising:
a planarization foreign matter compensation layer disposed between the second inorganic layer and the second organic layer.

10. A self-emission type of display device comprising:
a light emitting element including an anode and a cathode facing each other, and a light emission layer interposed between the anode and the cathode;
a first inorganic layer on the light emitting element, configured to protect the light emitting element from at least one of oxygen and moisture;
an organic structure on the first inorganic layer, included a first organic layer and a second organic layer on the first organic layer; and
a second inorganic layer on the second organic layer, configured to encapsulate the organic structure by covering upper and side surface of the organic structure,
wherein the first organic layer is configured of an acryl resin, a silicon resin, or an epoxy resin and the second organic layer is configured of a silicon oxycarbon (SiOC), and a thickness of the first organic layer is relatively larger than a thickness of the second organic layer.

11. The self-emission type of display device according to claim 10 , further comprising:
a planarization foreign matter compensation layer disposed on the second inorganic layer.

12. The self-emission type of display device according to claim 10 , further comprising:
a planarization foreign matter compensation layer disposed between the second inorganic layer and the second organic layer.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Jaeyoung
• Yang Wonjae
• Park Joonwon
• Kim Tae-Kyung
• Lee Sangheun
• Huh Haeri
• Heo Hunhoe
• Kim Ji-Min

Classifications

• H05B33/04 Primary

  Sealing arrangements {, e.g. against humidity} · CPC title

• H05B33/14

  characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source} · CPC title

• H01L51/5253

  Electricity · mapped topic

• H01L51/5256

  Electricity · mapped topic

• H01L2251/5338

  Electricity · mapped topic