Display device with enhanced damage resistance and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-11050038-B2
Application number	US-201715824681-A
Country	US
Kind code	B2
Filing date	Nov 28, 2017
Priority date	Dec 28, 2016
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A display device and a method for manufacturing the same are disclosed, in which a cathode electrode is not separated from an organic light emitting layer. The method for manufacturing a display device comprises the steps of forming pixels on a display area on a first substrate, forming an encapsulation film to cover the display area, attaching a protective film onto the encapsulation film, and removing the protective film. When attaching the protective film, the protective film includes a substrate layer and an adhesive layer formed at an edge area of at least one side of the substrate layer.

First claim

What is claimed is:

1. A display device comprising:
a substrate including a display area on which pixels are arranged, and a non-display area surrounding the display area;
an encapsulation film covering the display area; and
a protective film adhered onto the substrate,
wherein the protective film includes a substrate layer and a first adhesive layer formed at an edge area of at least one side of the substrate layer,
wherein each of the pixels includes a first electrode, an organic light emitting layer arranged on the first electrode, and a second electrode arranged on the organic light emitting layer,
wherein a horizontal projection of the first adhesive layer is not overlapped with a horizontal projection of the second electrode,
wherein the first adhesive layer contacts at least part of an upper surface of the encapsulation film and a side surface of the encapsulation film, and
wherein the substrate layer is provided with an air gap formed at a center area, the air gap being formed between the substrate layer and the encapsulation film.

2. The display device of claim 1 , wherein the edge area of at least one side of the substrate layer is overlapped with the non-display area surrounding the display area.

3. The display device of claim 1 , wherein the center area is disposed in the display area.

4. The display device of claim 1 , wherein the air gap is provided on the second electrode.

5. The display device of claim 1 , wherein the first adhesive layer is formed in a closed rectangular shape surrounding the air gap.

6. The display device of claim 1 , wherein an interface between the air gap and the first adhesive layer corresponds to an outermost edge of the second electrode.

7. The display device of claim 1 , wherein the encapsulation film includes a first inorganic film, an organic film and a second inorganic film.

8. A display device comprising:
a substrate including a display area on which pixels are arranged, and a non-display area surrounding the display area;
an encapsulation film covering the display area; and
a protective film adhered onto the substrate,
wherein the protective film includes a substrate layer and a first adhesive layer formed at an edge area of at least one side of the substrate layer,
wherein each of the pixels includes a first electrode, an organic light emitting layer arranged on the first electrode, and a second electrode arranged on the organic light emitting layer,
wherein a horizontal projection of the first adhesive layer is not overlapped with a horizontal projection of the second electrode,
wherein the first adhesive layer contacts at least part of an upper surface of the encapsulation film and a side surface of the encapsulation film, and
wherein the protective film further includes a second adhesive layer formed at a center area of the substrate layer.

9. The display device of claim 8 , wherein adhesion between the second adhesive layer and the encapsulation film is smaller than adhesion between the first adhesive layer and the encapsulation film.

10. The display device of claim 8 , wherein adhesion between the encapsulation film and the second adhesive layer is smaller than adhesion between the second electrode and the organic light emitting layer.

11. The display device of claim 8 , wherein the second adhesive layer is formed of a plurality of patterns.

12. A display device comprising:
a substrate including a display area on which pixels are arranged, and a non-display area surrounding the display area;
an encapsulation film covering the display area; and
a protective film adhered onto the substrate,
wherein the protective film includes a substrate layer and a first adhesive layer formed at an edge area of at least one side of the substrate layer,
wherein each of the pixels includes a first electrode, an organic light emitting layer arranged on the first electrode, and a second electrode arranged on the organic light emitting layer,
wherein a horizontal projection of the first adhesive layer is not overlapped with a horizontal projection of the second electrode, and
wherein the substrate layer is provided with an air gap formed at a center area, the air gap being formed between the substrate layer and the substrate.

Assignees

• Lg Display Co Ltd

Inventors

• Han Gyuhyeong
• Lim Heechul
• Kim Byoungchul
• Park Heesung

Classifications

• H10D84/01 Primary

  Manufacture or treatment · 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

• H10K59/1216

  the pixel elements being capacitors · CPC title

• H10K59/122

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