Flexible substrate and fabrication method thereof, and flexible display apparatus

Patent metadata

Field	Value
Publication number	US-12295250-B2
Application number	US-202418666521-A
Country	US
Kind code	B2
Filing date	May 16, 2024
Priority date	Sep 8, 2016
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

The present disclosure provides a display device. The display device includes: a flexible substrate including a first organic layer, a second organic layer, and an inorganic layer sandwiched between the first organic layer and the second organic layer; an organic light emitting diode device on the flexible substrate, the organic light emitting diode device including an anode, a cathode and an organic light emitting layer between the anode and the cathode; and a flexible encapsulation layer on the organic light emitting diode device. A material of the first organic layer is the same as a material of the second organic layer, a thickness of the first organic layer is greater than a thickness of the second organic layer, and at least one of the first organic layer or the second organic layer includes inorganic nano-particles.

First claim

The invention claimed is:

1. A display device comprising:
a flexible substrate comprising a first organic layer, a second organic layer, and an inorganic layer sandwiched between the first organic layer and the second organic layer;
an organic light emitting diode device on the flexible substrate, the organic light emitting diode device comprising an anode, a cathode and an organic light emitting layer between the anode and the cathode; and
a flexible encapsulation layer on the organic light emitting diode device,
wherein a material of the first organic layer is the same as a material of the second organic layer,
wherein a thickness of the first organic layer is greater than a thickness of the second organic layer, and
wherein at least one of the first organic layer or the second organic layer comprises inorganic nano-particles.

2. The display device according to claim 1 , wherein the thickness of the second organic layer is greater than or equal to 2 μm.

3. The display device according to claim 1 , wherein the thickness of the first organic layer is greater than or equal to 2 μm.

4. The display device according to claim 1 , wherein a thickness of the inorganic layer is 100 nm to 600 nm.

5. The display device according to claim 1 , wherein a thickness of the inorganic layer is 300 nm to 600 nm.

6. The display device according to claim 1 , wherein a material of the inorganic layer is at least one selected from a group consisting of silicon oxide, silicon nitride, silicon oxynitride and aluminum oxide.

7. The display device according to claim 1 , wherein
the first organic layer comprises a single organic material layer, or
the first organic layer comprises a plurality of organic material layers.

8. The display device according to claim 1 , wherein
the second organic layer comprises a single organic material layer, or
the second organic layer comprises a plurality of organic material layers.

9. The display device according to claim 1 , wherein the material of the first organic layer is selected from a group consisting of polyimide, polyethylene naphthalate, polyethylene terephthalate, polyarylate, polycarbonate, polyetherimide, and polyethersulfone.

10. The display device according to claim 1 , wherein the material of the second organic layer is selected from a group consisting of polyimide, polyethylene naphthalate, polyethylene terephthalate, polyarylate, polycarbonate, polyetherimide, and polyethersulfone.

11. The display device according to claim 1 , wherein the materials of the first organic layer and the second organic layer are both polyimide.

12. The display device according to claim 1 , wherein a material of the inorganic nano-particles is selected from a group consisting of silicon dioxide, aluminum oxide, and titanium oxide.

13. The display device according to claim 1 , wherein the first organic layer comprises the inorganic nano-particles.

14. The display device according to claim 13 , wherein a material of the inorganic nano-particles is selected from a group consisting of silicon dioxide, aluminum oxide, and titanium oxide.

15. The display device according to claim 1 , wherein the first organic layer is configured to be removed from a rigid auxiliary substrate.

16. The display device according to claim 1 , wherein the thickness of the first organic layer is approximately twice the thickness of the second organic layer.

17. A display device comprising:
a first organic layer;
an inorganic layer on the first organic layer;
a second organic layer on a side of the inorganic layer away from the first organic layer;
a display equipment on a side of the second organic layer away from the first organic layer and comprising a driving device and an organic light emitting diode device; and
an encapsulation layer on a side of the display equipment away from the first organic layer,
wherein the driving device comprises a thin film transistor, and the organic light emitting diode device comprises an anode, a cathode and an organic light emitting layer between the anode and the cathode,
wherein a material of the first organic layer is the same as a material of the second organic layer,
wherein a thickness of the first organic layer is greater than a thickness of the second organic layer, and
wherein the second organic layer comprises inorganic nano-particles.

18. The display device according to claim 17 , wherein the materials of the first organic layer and the second organic layer are selected from a group consisting of polyimide, polyethylene naphthalate, polyethylene terephthalate, polyarylate, polycarbonate, polyetherimide, and polyethersulfone.

19. The display device according to claim 17 , wherein a material of the inorganic nano-particles is selected from a group consisting of silicon dioxide, aluminum oxide, and titanium oxide.

20. The display device according to claim 17 , wherein the first organic layer comprises a single organic material layer or a plurality of organic material layers, and the second organic layer comprises a single organic material layer or a plurality of organic material layers.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Hejin
• Hsieh Mingche
• Zhou Weifeng
• Kao Shanchen
• Wang Dawei

Classifications

• H10K2102/311

  Flexible OLED · CPC title

• H10K2102/00

  Constructional details relating to the organic devices covered by this subclass · CPC title

• H10K50/844

  Encapsulations · CPC title

• H10K77/111 Primary

  Flexible substrates · CPC title

• Y02E10/549

  Organic PV cells · CPC title