Organic light emitting display apparatus and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9768411-B2
Application number	US-201414522737-A
Country	US
Kind code	B2
Filing date	Oct 24, 2014
Priority date	Nov 29, 2013
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

Provided are an organic light emitting display (OLED) apparatus and a manufacturing method thereof. The OLED apparatus includes: a thin film transistor (TFT) array substrate including: a support substrate, including a soft material and a plurality of TFTs on the support substrate corresponding to a plurality of pixel areas, a light emitting array (LEA) including a plurality of organic light emitting devices on the TFT array substrate corresponding to the plurality of pixel areas, a sealing structure facing the TFT array substrate, the LEA interposed between the TFT array substrate and the sealing structure, and an adhesive layer between the LEA and the sealing structure to adhere the LEA to the sealing structure, wherein the sealing structure includes: a protective layer on the LEA, a sealing layer over the TFT array substrate, and a barrier layer adhering the protective layer to the sealing layer.

First claim

What is claimed is:

1. An organic light emitting display apparatus, comprising:
a thin film transistor array substrate comprising:
a flexible support substrate comprising a flexible material; and
a plurality of thin film transistors on the flexible support substrate and the plurality of thin film transistors corresponding to a plurality of pixel areas;
a light emitting array comprising a plurality of organic light emitting devices on the thin film transistor array substrate and corresponding to the plurality of pixel areas;
a sealing structure over the thin film transistor array substrate, such that the light emitting array is interposed between the thin film transistor array substrate and the sealing structure; and
an adhesive layer between the light emitting array and the sealing structure, such that the light emitting array and the sealing structure are adhered to each other by the adhesive layer, wherein the adhesive layer is hydrophobic,
wherein the sealing structure includes:
a protective layer over the adhesive layer;
a sealing layer over the thin film transistor array substrate; and
a barrier layer bonding the protective layer and the sealing layer to each other, wherein the barrier layer is formed of an insulating material having adhesion and water transmission properties, and
wherein the barrier layer covers a sidewall of the light emitting array and directly contacts the flexible support substrate.

2. The apparatus according to claim 1 , wherein the adhesive layer comprises a transparent and insulating material selected from one or more of: olefin-based, acryl-based, and silicon-based insulating materials.

3. The apparatus according to claim 2 , wherein the adhesive layer comprises the olefin-based insulating material having hydrophobic and adhesive properties.

4. The apparatus according to claim 2 , wherein:
the adhesive layer comprises a film having adhesive surfaces on both sides; and
the adhesive layer bonds the light emitting array and the sealing structure to increase adhesion between the light emitting array and the sealing structure.

5. The apparatus according to claim 1 , wherein the protective layer comprises a first insulator layer comprising an aluminum oxide-based material.

6. The apparatus according to claim 5 , wherein the first insulator layer has a thickness in a range of 20 nm-50 nm.

7. The apparatus according to claim 5 , wherein the protective layer comprises:
at least one first insulator layer; and
at least one second insulator layer on an upper surface or a lower surface of the first insulator layer, the second insulator layer comprising any one or more of: SiN x , SiO y , and SiOC z .

8. The apparatus according to claim 1 , wherein each of the protective layer, the sealing layer, and the barrier layer covers the sidewall of the light emitting array and directly contacts the flexible support substrate.

9. A manufacturing method of an organic light emitting display apparatus, the method comprising:
providing a thin film transistor array substrate and a light emitting array, the thin film transistor array substrate comprising a flexible support substrate and a plurality of thin film transistors on the flexible support substrate, the flexible support substrate comprising a flexible material, the plurality of thin film transistors corresponding to a plurality of pixel areas, the light emitting array comprising a plurality of organic light emitting devices on the thin film transistor array substrate, the plurality of organic light emitting devices corresponding to the plurality of pixel areas;
providing a protective layer, the protective layer comprising a first insulator layer, the first insulator layer comprising aluminum oxide;
aligning a sealing layer on the protective layer, such that the sealing layer is over the thin film transistor array substrate; and
providing an adhesive layer between the light emitting array and the sealing structure, such that the light emitting array and the sealing structure are adhered to each other by the adhesive layer, wherein the adhesive layer is hydrophobic, attaching the sealing layer to the protective layer using a barrier layer between the sealing layer and the protective layer, wherein both surfaces of the adhesive layer are adhesive surfaces, such that the light emitting array and the protective layer are bonded by the adhesive layer, thereby increasing adhesion between the light emitting array and the protective layer, wherein the barrier layer is formed of an insulating material having adhesion and water transmission properties, and
wherein the barrier layer covers a sidewall of the light emitting array and directly contacts the flexible support substrate.

10. The method according to claim 9 , wherein the adhesive layer comprises a transparent and insulating material selected from one or more of: olefin-based, acryl-based, and silicon-based insulating materials.

11. The method according to claim 10 , wherein the adhesive layer comprises the olefin-based insulating material having hydrophobic and adhesive properties.

12. The method according to claim 9 , wherein the first insulator layer has a thickness in a range of 20 nm˜50 nm.

13. The method according to claim 9 , wherein the protective layer comprises:
at least one first insulator layer; and
at least one second insulator layer formed on an upper surface or a lower surface of the first insulator layer, the second insulator layer comprising any one or more of: SiN x , SiO y , and SiOC z .

14. The apparatus according to claim 1 , wherein the protective layer comprises an aluminum oxide-based material.

15. The apparatus according to claim 1 , wherein the barrier layer is transparent.

16. The apparatus according to claim 1 , wherein the plurality of organic light emitting devices include active areas that emit light, and the barrier layer covers the active areas that emit light.

17. The apparatus according to claim 1 , wherein the barrier layer covers sides of the plurality of light emitting arrays to encapsulate the plurality of light emitting arrays.

18. The apparatus according to claim 1 , wherein the protective layer is between the barrier layer and the adhesive layer.

19. The method according to claim 9 , wherein each of the protective layer, the sealing layer, and the barrier layer covers the sidewall of the light emitting array and directly contacts the flexible support substrate.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Jae-Young
• Park Joon-Won
• Lee Sang-Heun
• Huh Hae-Ri
• Heo Hun-Hoe
• Kim Ji-Min

Classifications

• H10K2102/351

  Thickness · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/1213

  the pixel elements being TFTs · CPC title

• H10K77/111

  Flexible substrates · CPC title

• H10K59/873 Primary

  Encapsulations · CPC title