Flexible display device with a cushion layer

Patent metadata

Field	Value
Publication number	US-11482137-B2
Application number	US-201816120481-A
Country	US
Kind code	B2
Filing date	Sep 4, 2018
Priority date	Aug 18, 2016
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

A flexible display device including a flexible display panel having a substrate and an organic electroluminescent member disposed on the substrate, a window member disposed on the flexible display panel, and a protection member disposed under the flexible display panel, wherein the protection member includes a metal layer disposed under the substrate, a cushion layer disposed under the metal layer, and a planarization layer disposed between the metal layer and the cushion layer.

First claim

What is claimed is:

1. A display device, comprising:
a display panel including a plurality of pixels in a display area, each of the plurality of pixels including a thin film transistor and an electroluminescent member electrically connected to the thin film transistor;
a metal layer disposed under the display panel and overlapping the display area;
a first layer disposed under the metal layer and comprising an uneven portion; and
a second layer disposed between the metal layer and the first layer and comprising an organic material,
wherein:
the second layer comprises a first sub-layer disposed under the metal layer and a second sub-layer disposed under the first sub-layer;
the second sub-layer is disposed on the first layer and comprises the organic material;
the first layer comprises a polymer resin foam;
each of the first sub-layer and the second sub-layer overlaps the display area; and
a density of the second sub-layer is less than a density of the first sub-layer.

2. The display device of claim 1 , further comprising a window member disposed on the display panel.

3. The display device of claim 2 , wherein the window member comprises a glass substrate, and a thickness of the window member is about 50 μm to about 90 μm.

4. The display device of claim 1 , wherein the first layer comprises a plurality of air gaps.

5. The display device of claim 1 , wherein the first sub-layer and the second sub-layer are in contact with each other.

6. The display device of claim 1 , wherein the first sub-layer and the second sub-layer comprise a same material.

7. The display device of claim 1 , wherein the second layer comprises at least one of polyurethane, polyacrylic, polyimide, and poly epoxy.

8. The display device of claim 1 , wherein the metal layer comprises a nickel-iron alloy.

9. The display device of claim 1 , wherein the metal layer and the second layer are in contact with each other.

10. The display device of claim 1 , further comprising:
a first adhesive member disposed between the display panel and the metal layer; and
a second adhesive member disposed between the second layer and the first layer.

11. The display device of claim 1 , wherein:
the electroluminescent member is an organic electroluminescent member;
the display panel comprises:
a substrate, wherein the organic electroluminescent member is disposed on the substrate; and
a thin film encapsulating layer on the organic electroluminescent member; and the organic electroluminescent member comprises:
a first electrode disposed on the substrate;
an organic layer disposed on the first electrode and having a light-emitting layer; and
a second electrode disposed between the organic layer and the thin film encapsulating layer.

12. The display device of claim 1 , further comprising a touch sensing member disposed on the display panel.

13. The display device of claim 1 , further comprising a polarizing member disposed on the display panel.

14. The display device of claim 2 , wherein a thickness of the window member is about 50 μm to about 100 μm.

15. The display device of claim 1 , wherein the display panel comprises a portion that is bent about a bending axis.

16. A display device, comprising:
a display panel including a plurality of pixels in a display area, each of the plurality of pixels including a thin film transistor and an electroluminescent member electrically connected to the thin film transistor;
a metal layer disposed under the display panel and overlapping the display area;
a first layer disposed under the metal layer and comprising an uneven portion; and
a second layer disposed between the metal layer and the first layer and comprising an organic material,
wherein:
the second layer comprises a first sub-layer disposed under the metal layer and a second sub-layer disposed under the first sub-layer;
the second sub-layer is disposed on the first layer and comprises the organic material;
the first layer comprises a plurality of air gaps;
each of the first sub-layer and the second sub-layer overlaps the display area; and
a density of the second sub-layer is less than a density of the first sub-layer.

17. The display device of claim 16 , wherein the first sub-layer and the second sub-layer are in contact with each other.

18. The display device of claim 16 , wherein the first sub-layer and the second sub-layer comprise a same material.

Assignees

• Samsung Display Co Ltd

Inventors

• Han Jiwon

Classifications

• G06F1/1616 Primary

  with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position · CPC title

• G06F1/1652

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title

• H01L2251/5338

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic

• H01L27/3258

  Electricity · mapped topic