Foldable display device and method of manufacturing foldable display device

Patent metadata

Field	Value
Publication number	US-10777101-B2
Application number	US-201916260113-A
Country	US
Kind code	B2
Filing date	Jan 29, 2019
Priority date	May 4, 2018
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A foldable display device including a panel pad unit, a first polymer layer disposed on the panel pad unit and including a first repeated subunit organic compound, a rigid layer disposed on the first polymer layer, a second polymer layer disposed on the rigid layer and including a second repeated subunit organic compound, a panel light-emitting unit disposed on the second polymer layer, and a third polymer layer disposed on the panel light-emitting unit and including a third repeated subunit organic compound.

First claim

What is claimed is:

1. A foldable display device comprising:
a panel pad unit;
a first polymer layer disposed on the panel pad unit and comprising a first repeated subunit organic compound;
a rigid layer disposed on the first polymer layer;
a second polymer layer disposed on the rigid layer and comprising a second repeated subunit organic compound;
a panel light-emitting unit disposed on the second polymer layer; and
a third polymer layer disposed on the panel light-emitting unit and comprising a third repeated subunit organic compound,
wherein:
the panel light-emitting unit has a first non-foldable region, a second non-foldable region, and a foldable region between the first and second non-foldable regions;
the rigid layer comprises a first portion corresponding to the first non-foldable region and a second portion corresponding to the second non-foldable region; and
the panel pad unit is integrally formed with the panel light-emitting unit as a single piece such that the panel pad unit is connected to the panel light-emitting unit.

2. The foldable display device of claim 1 , wherein the rigid layer comprises metal.

3. The foldable display device of claim 1 , wherein a neutral plane is configured to be formed in the panel light-emitting unit between the first portion and the second portion.

4. The foldable display device of claim 1 , further comprising a spacer layer disposed between the first polymer layer and the rigid layer.

5. The foldable display device of claim 1 , wherein the second polymer layer has a visible light transmittance relatively less than that of the third polymer layer.

6. The foldable display device of claim 1 , wherein the second polymer layer has a visible light transmittance relatively less than that of the first polymer layer.

7. The foldable display device of claim 1 , wherein:
the second polymer layer has a thermo-mechanical property relatively greater than that of the third polymer layer; and
the thermo-mechanical property is at least one selected from the group consisting of ultimate tensile strength, initial tensile modulus, elongation at break, and glass transition temperature.

8. The foldable display device of claim 1 , wherein:
the first repeated subunit organic compound is included in a first series; and
the second repeated subunit organic compound and the third repeated subunit organic compound are included in a second series substantially different from the first series.

9. The foldable display device of claim 8 , wherein:
the second series is an aromatic series; and
the second repeated subunit organic compound has an aromatic ring density relatively greater than that of the third repeated subunit organic compound.

10. The foldable display device of claim 8 , wherein:
the first series is a non-aromatic series; and
the second series is an aromatic series.

11. The foldable display device of claim 1 , wherein the second polymer layer has a yellow index relatively greater than that of the first polymer layer.

12. The foldable display device of claim 11 , wherein the second polymer layer has a yellow index relatively greater than that of the third polymer layer.

13. The foldable display device of claim 1 , wherein the second polymer layer has a yellow index relatively greater than that of the third polymer layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Myoung Seo

Classifications

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/8731

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

• H10K59/873

  Encapsulations · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• G09F9/301 Primary

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title