Organic light emitting display apparatus

Patent metadata

Field	Value
Publication number	US-9601717-B2
Application number	US-201514749431-A
Country	US
Kind code	B2
Filing date	Jun 24, 2015
Priority date	Jun 25, 2014
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

An organic light-emitting display (OLED) device includes: a pixel area defined by a plurality of pixels on a flexible substrate; a non-pixel area around the pixel area; a gate driver in the non-pixel area; a structure in the non-pixel area configured to surround the pixel area; a first encapsulation layer covering the plurality of pixels, the gate driver and the structure; and a particle cover layer covering the pixel area and suppressed from being excessively spread by the structure.

First claim

What is claimed is:

1. An organic light-emitting display (OLED) device comprising:
a pixel area defined by a plurality of pixels on a flexible substrate;
a non-pixel area around the pixel area;
a gate driver in the non-pixel area;
a structure in the non-pixel area configured to surround the pixel area;
a first encapsulation layer covering the plurality of pixels, the gate driver and the structure; and
cover layer covering the pixel area,
wherein the structure comprises a plurality of walls,
wherein a wall disposed closer to the inside among the plurality of walls is configured to be lower than a wall disposed closer to the outside among the plurality of walls,
wherein the wall disposed closer to the inside is at least one layer and is made of the same material as a material of at least one of a bank, a spacer, a planarizing layer and an interlayer insulating film disposed in the plurality of pixels, and
wherein the wall disposed closer to the outside is a multilayer and is made of the same materials as materials of at least two of the bank, the spacer, the planarizing layer and the interlayer insulating film disposed in the plurality of pixels.

2. The OLED device of claim 1 , further comprising a second encapsulation layer covering the first encapsulation layer and the cover layer.

3. The OLED device of claim 2 , wherein the structure includes at least one of an organic material and an inorganic material, and the first encapsulation layer covering the structure resists penetration of moisture through the structure.

4. The OLED device of claim 1 , further comprising:
a second encapsulation layer;
a flexible encapsulation unit disposed to cover the pixel area and the non-pixel area, the flexible encapsulation unit having the first encapsulation layer, the second encapsulation layer, the structure and the cover layer; and
a barrier film comprising a pressure-sensitive adhesive layer and attached on the flexible encapsulation unit by the pressure-sensitive adhesive layer,
wherein the barrier film is attached on the second encapsulation layer of the flexible encapsulation unit, and
wherein the structure has a particular height and is configured to surround the cover layer in the non-pixel area, so that a portion of the pressure-sensitive adhesive layer is configured to be pressed by the structure to be attached in the non-pixel area.

5. The OLED device of claim 4 , wherein the structure is a multilayer structure and
wherein the multilayer structure has a particular height that is capable of suppressing the excessively spread for increasing adhesion of the barrier film.

6. The OLED device of claim 5 , wherein a width in cross section of a top layer of the multilayer structure is narrower than a width in cross section of a bottom layer thereof.

7. The OLED device of claim 1 , further comprising a storage space configured to receive the cover layer when the cover layer overflows, the storage space being disposed between the plurality of walls.

8. The OLED device of claim 1 , further comprising a metal layer disposed under the structure.

9. The OLED device of claim 7 , wherein the storage space is configured to surround the pixel area.

10. The OLED device of claim 7 , wherein the storage space contains an overflowed portion of the cover layer.

11. An organic light-emitting display (OLED) device comprising:
a pixel area defined by a plurality of pixels on a flexible substrate;
a non-pixel area around the pixel area;
a gate driver in the non-pixel area;
a structure in the non-pixel area configured to surround the pixel area;
a first encapsulation layer covering the plurality of pixels, the gate driver and the structure; and
a cover layer covering the pixel area,
wherein the structure is a multilayer structure to suppress excessive spread of the cover layer,
wherein a top layer of the multilayer structure comprises a plurality of subsidiary structures, and
wherein the subsidiary structures are spaced apart from each other and comprise a storage space configured to disperse the cover layer when the cover layer overflows.

12. The OLED device of claim 11 , wherein the multilayer structure is made of the same material as materials of at least two of a bank, a spacer, a planarizing layer and an interlayer film disposed in the plurality of pixels.

13. The OLED device of claim 11 , wherein the storage space is configured to surround the pixel area.

14. The OLED device of claim 11 , wherein the cover layer is configured to planarize the pixel area, and
wherein a height of the cover layer near the structure is higher than a height of the structure.

15. An organic light-emitting display (OLED) device comprising:
a pixel area defined by a plurality of pixels on a flexible substrate;
a non-pixel area around the pixel area;
a gate driver in the non-pixel area;
a structure in the non-pixel area configured to surround the pixel area; and
a flexible encapsulation unit configured to seal the plurality of pixels and comprising:
a first encapsulation layer covering the plurality of pixels, the gate driver and the structure,
a cover layer covering the pixel area, the cover layer acting as a compensation layer that planarizes the plurality of pixels, and a height of the cover layer gradually decreases from an outer periphery of the plurality of pixels to the structure, and
a second encapsulation layer covering the cover layer,

wherein the cover layer is sealed by the first encapsulation layer and the second encapsulation layer at the outer periphery of the plurality of pixels, and an area where the first encapsulation layer and the second encapsulation layer come in contact with each other is extended beyond the structure by a particular distance.

16. The OLED device of claim 15 , wherein the structure includes a stair-like dam that is configured to become higher towards the extended area.

17. The OLED device of claim 16 , wherein the stair-like dam comprises a plurality of subsidiary stair-like dams spaced apart from each other, and comprises an interposed storage space configured to disperse the cover layer when the cover layer overflows.

18. The OLED device of claim 15 , wherein the structure includes a metal structure made of a metal material.

19. The OLED device of claim 18 , wherein the metal structure further comprises a plurality of subsidiary metal structures spaced apart from each other.

20. The OLED device of claim 19 , wherein the metal structure is made of one of silver (Ag), tin (Sn), aluminum (Al) and an indium tin oxide (ITO).

21. The OLED device of claim 15 , further comprising a storage space configured to receive the cover layer when the cover layer overflows, the storage space being disposed between a plurality of walls of the structure.

22. The OLED device of claim 21 , further comprising a metal layer disposed under the structure.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Myoungsoo
• Choi Wonyeol
• Kim Byoungchul
• Park Heesung

Classifications

• H10K59/8731

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

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• H10K50/8445

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

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title

• H01L2251/5338

  Electricity · mapped topic