Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11380858-B2
Application number	US-202016775071-A
Country	US
Kind code	B2
Filing date	Jan 28, 2020
Priority date	Mar 13, 2019
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

A display device according to an embodiment of the present disclosure may include a substrate, a display element layer on the substrate, an encapsulation layer on the display element layer to seal the display element layer, a polarizing layer on the encapsulation layer, a first protection layer on the substrate and spaced apart from the polarizing layer, and a second protection layer on the substrate and covering a portion of the first protection layer, wherein the first protection layer has a thickness that is greater than a thickness of the second protection layer.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
a display element layer on the substrate;
an encapsulation layer on the display element layer to seal the display element layer;
a first protection layer on the substrate and spaced apart from the encapsulation layer; and
a second protection layer on the substrate and covering a portion of the first protection layer,
wherein the first protection layer has a thickness that is greater than a thickness of the second protection layer, and
wherein a bottom surface of the first protection layer is coplanar with a bottom surface of the second protection layer.

2. The display device of claim 1 , wherein the display device further comprises a polarizing layer on the encapsulation layer,
wherein the substrate comprises a first area, and a second area bent from the first area,
wherein the polarizing layer is at the first area, and
wherein the second protection layer is at the second area.

3. The display device of claim 2 , wherein the first protection layer overlaps a boundary between the first area and the second area on a plane.

4. The display device of claim 2 , further comprising a support layer below the first area.

5. The display device of claim 4 , wherein a portion of the support layer overlaps at least a portion of the first protection layer on a plane, and
wherein an overlapped area between the support layer and the first protection layer has a width of about 140 μm.

6. The display device of claim 1 , wherein the second protection layer is spaced apart from the encapsulation layer with the first protection layer therebetween.

7. The display device of claim 1 , wherein the first protection layer is spaced apart from the display element layer.

8. A display device comprising:
a substrate;
a display element layer on the substrate;
an encapsulation layer on the display element layer to seal the display element layer; and
a first protection layer on the substrate and spaced apart from the encapsulation layer in a direction that is orthogonal to a thickness direction of the display device.

9. The display device of claim 8 , wherein the display device further comprises a polarizing layer on the encapsulation layer,
wherein the substrate comprises a first area, and a second area bent from the first area,
wherein the polarizing layer is at the first area, and
wherein the first protection layer is at a portion of the first area, and is at the second area.

10. The display device of claim 8 , further comprising a support layer below the substrate.

11. The display device of claim 10 , wherein a portion of the support layer overlaps a portion of the first protection layer on a plane, and
wherein an overlapped area between the support layer and the first protection layer has a width of about 140 μm.

12. The display device of claim 8 , further comprising a second protection layer between the encapsulation layer and the first protection layer on the substrate, and spaced apart from the encapsulation layer.

13. The display device of claim 12 , wherein the second protection layer has a thickness that is greater than that of the first protection layer.

14. A method of manufacturing a display device, comprising:
forming a display element layer on a substrate;
forming an encapsulation layer on the display element layer;
forming a first protection layer, which is spaced apart from the encapsulation layer and has a first thickness, on the substrate; and
forming a second protection layer, which is spaced apart from the encapsulation layer in a direction that is orthogonal to a thickness direction of the display device with the first protection layer therebetween, and which has a second thickness that is less than the first thickness.

15. The method of claim 14 , wherein the substrate comprises a first area on which the display element layer is located, and a second area on which the first protection layer and the second protection layer are located, and
wherein the method further comprises bending the second area.

16. The method of claim 14 , wherein the forming of the first protection layer comprises:
forming a first preliminary protection layer; and
curing the first preliminary protection layer to form the first protection layer.

17. The method of claim 16 , wherein the first preliminary protection layer comprises a photocurable resin.

18. The method of claim 16 , wherein the forming of the second protection layer comprises:
forming a second preliminary protection layer configured to cover at least a portion of the first protection layer; and
curing the second preliminary protection layer to form the second protection layer.

19. The method of claim 18 , wherein the second preliminary protection layer comprises a photocurable resin.

20. The method of claim 18 , wherein the curing of the first preliminary protection layer occurs before the curing of the second preliminary protection layer.

21. The display device of claim 9 , wherein a thickness distance between a top surface of the substrate and a top surface of the polarizing layer is the same as a thickness distance between the top surface of the substrate and a top surface of the first protection layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Hyoungwook
• Cho Yewon
• Kang Hojin
• Kim Muhyun
• Kim Jinhwan

Classifications

• H04M1/0268

  including a flexible display panel · CPC title

• H10K71/00

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

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K59/8793

  Arrangements for polarized light emission (H10K59/8791 takes precedence) · CPC title

• H10K59/873

  Encapsulations · CPC title