Organic light emitting display device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9755183-B2
Application number	US-201514870897-A
Country	US
Kind code	B2
Filing date	Sep 30, 2015
Priority date	Sep 30, 2014
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

Disclosed is an organic light emitting display device that includes a foreign matter compensation layer on an inorganic layer. A passivation layer and a second inorganic layer are in direct contact with each other at the edge of the substrate. Accordingly, the number of interfaces between the inorganic layers is decreased. Thus, even if the organic light emitting display device is bent, a moisture permeation path, which may be unexpectedly formed, can be minimized.

First claim

What is claimed is:

1. An organic light emitting display device comprising:
a flexible substrate having an emission area and an edge sealed area;
a thin-film transistor on the flexible substrate in the emission area;
a passivation layer configured to cover the flexible substrate and the thin-film transistor;
an organic light emitting element configured to be connected to the thin-film transistor on the passivation layer;
a first inorganic layer formed of a different material from the passivation layer and configured to seal the organic light emitting element such that the first inorganic layer covers the organic light emitting element at the emission area, and an extended portion of the first inorganic layer is in contact with the passivation layer at an outer portion of the emission area;
a foreign matter compensation layer on the first inorganic layer; and
a second inorganic layer formed of a same material as the passivation layer configured to cover the foreign matter compensation layer, and configured to be sealed at the edge sealed area such that the second inorganic layer is in contact with the passivation layer.

2. The organic light emitting display device according to claim 1 , wherein the first inorganic layer is covered by the foreign matter compensation layer and separated from the second inorganic layer by the foreign matter compensation layer.

3. The organic light emitting display device according to claim 1 , wherein a portion of the first inorganic layer is interposed between the passivation layer and the second inorganic layer so as to be in direct contact with the passivation layer and the second inorganic layer.

4. The organic light emitting display device according to claim 1 , wherein an edge of the substrate where the passivation layer and the second inorganic layer are in direct contact with each other surrounds an area where the first inorganic layer is disposed.

5. The organic light emitting display device according to claim 1 , wherein the passivation layer and the second inorganic layer are formed of any one of silicon nitride, silicon oxide, silicon oxynitride, or combinations thereof.

6. The organic light emitting display device according to claim 5 , wherein a thickness of the passivation layer is greater than a thickness of the first inorganic layer, and a thickness of the second inorganic layer is greater than a thickness of the first inorganic layer.

7. The organic light emitting display device according to claim 5 , wherein the first inorganic layer is formed of any one of aluminum oxide, titanium oxide, zinc oxide, silicon oxide, or combinations thereof.

8. The organic light emitting display device according to claim 7 , wherein the first inorganic layer is formed of aluminum oxide having a thickness of 200 nm or less.

9. The organic light emitting display device according to claim 1 , wherein the foreign matter compensation layer has a plurality of layers of different materials.

10. The organic light emitting display device according to claim 1 , wherein adhesiveness between the first inorganic layer and the second inorganic layer is greater than adhesiveness between the foreign matter compensation layer and one of the first inorganic layer and the second inorganic layer.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Tae-Kyung
• Lee Sangheun
• Kim Junggi

Classifications

• H01L51/0097

  Electricity · mapped topic

• H01L2251/5338

  Electricity · mapped topic

• H01L51/5246

  Electricity · mapped topic

• H01L51/5253 Primary

  Electricity · mapped topic

• H01L27/3258

  Electricity · mapped topic