Flexible display panel

Patent metadata

Field	Value
Publication number	US-12446455-B2
Application number	US-202117405873-A
Country	US
Kind code	B2
Filing date	Aug 18, 2021
Priority date	Feb 21, 2017
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A flexible display panel is provided. The flexible display panel includes: a flexible substrate; a flexible display screen on the flexible substrate; a protection film disposed at a side of the flexible display screen away from the flexible substrate; and at least one optical clear adhesive layer between the flexible display screen and the protection film. The flexible display panel further includes a circular polarizer, and the circular polarizer is disposed on a side of the flexible display screen away from the flexible substrate. The flexible display panel is a flexible organic light-emitting display panel, the circular polarizer is between the flexible display screen and the at least one optical clear adhesive layer, and the protection film includes at least one inorganic material film.

First claim

What is claimed is:

1. A flexible display panel, comprising:
a flexible substrate;
a flexible display screen on the flexible substrate;
a protection film disposed at a side of the flexible display screen away from the flexible substrate; and
at least one optical clear adhesive layer between the flexible display screen and the protection film,
wherein the flexible display panel further comprises a circular polarizer, and the circular polarizer is disposed on a side of the flexible display screen away from the flexible substrate,
the flexible display panel is a flexible organic light-emitting display panel,
the circular polarizer is between the flexible display screen and the at least one optical clear adhesive layer, and
the protection film comprises at least one inorganic material film,
wherein a stress neutral layer of the flexible display panel is between the flexible display screen and the circular polarizer, and the stress neutral layer is a plane formed by all positions where internal tangential stress is zero in case of the flexible display panel being bent and deformed.

2. The flexible display panel according to claim 1 , wherein the protection film further comprises at least one organic material film, and the at least one inorganic material film and the at least one organic material film are stacked.

3. The flexible display panel according to claim 1 , wherein the protection film further comprises at least two organic material film, and the at least one inorganic material film and the at least two organic material film form a stacked structure of inorganic material film—organic material film—inorganic material film.

4. The flexible display panel according to claim 2 , wherein the protection film further comprises at least one inorganic-organic material mixed film, and the at least one inorganic material film, the at least one organic material film and the at least one inorganic-organic material mixed film form a stacked structure of inorganic material film—organic material film—inorganic-organic material mixed film.

5. The flexible display panel according to claim 2 , wherein a material of the at least one organic material film comprises polyimide or polymethyl methacrylate.

6. The flexible display panel according to claim 1 , wherein the flexible substrate comprises an organic plastic substrate, and a material of the organic plastic substrate comprises polycarbonate, polyethylene terephthlate, polyethylene naphthalate, polyether sulfone, or polyimide.

7. The flexible display panel according to claim 1 , wherein the circular polarizer comprises a polarizing functional film, and a material of the polarizing functional film comprises polyvinyl alcohol or carbon nanotube.

8. A flexible display panel, comprising:
a flexible substrate;
a flexible display screen on the flexible substrate;
a protection film disposed at a side of the flexible display screen away from the flexible substrate; and
a connection layer sandwiched between the flexible display screen and the protection film,
wherein the connection layer comprises at least one hyperelasticity film and an optical clear adhesive layer,
the flexible display panel further comprises a circular polarizer, and the circular polarizer is disposed on a side of the flexible display screen away from the flexible substrate,
the flexible display panel is a flexible organic light-emitting display panel,
the circular polarizer is between the flexible display screen and the connection layer, and
the protection film comprises at least one inorganic material film,
wherein a stress neutral layer of the flexible display panel is between the flexible display screen and the circular polarizer, and the stress neutral layer is a plane formed by all positions where internal tangential stress is zero in case of the flexible display panel being bent and deformed.

9. The flexible display panel according to claim 8 , wherein the protection film further comprises at least one organic material film, and the at least one inorganic material film and the at least one organic material film are stacked.

10. The flexible display panel according to claim 8 , wherein the protection film further comprises at least two organic material film, and the at least one inorganic material film and the at least two organic material film form a stacked structure of inorganic material film—organic material film—inorganic material film.

11. The flexible display panel according to claim 9 , wherein the protection film further comprises at least one inorganic-organic material mixed film, and the at least one inorganic material film, the at least one organic material film and the at least one inorganic-organic material mixed film form a stacked structure of inorganic material film—organic material film—inorganic-organic material mixed film.

12. The flexible display panel according to claim 9 , wherein a material of the at least one organic material film comprises polyimide or polymethyl methacrylate.

13. The flexible display panel according to claim 8 , further comprising a touch screen,
wherein the touch screen is on a side of the flexible display screen closer to the protection film, and the stress neutral layer is on the touch screen.

14. A flexible display panel, comprising:
a flexible substrate;
a flexible display screen on the flexible substrate;
a protection film disposed at a side of the flexible display screen away from the flexible substrate; and
at least one optical clear adhesive layer between the flexible display screen and the protection film,
wherein the flexible display panel further comprises a circular polarizer, and the circular polarizer is disposed on a side of the flexible display screen away from the flexible substrate,
the flexible display panel is a flexible organic light-emitting display panel,
the circular polarizer is between the flexible display screen and the at least one optical clear adhesive layer, and
the protection film comprises at least one inorganic-organic material mixed film,
wherein a stress neutral layer of the flexible display panel is between the flexible display screen and the circular polarizer, and the stress neutral layer is a plane formed by all positions where internal tangential stress is zero in case of the flexible display panel being bent and deformed.

15. The flexible display panel according to claim 14 , wherein the protection film further comprises at least one organic material film, and the at least one inorganic-organic material mixed film and the at least one organic material film are stacked.

16. The flexible display panel according to claim 15 , wherein the at least one inorganic-organic material mixed film comprises two inorganic-organic material mixed films, and the two inorganic-organic material mixed films and the at least one organic material film form a stacked structure of inorganic-organic material mixed film—organic material film—inorganic-organic material mixed film.

17. The flexible display panel according to claim 15 , wherein a material of the at least one organic material film comprises polyimide or polymethyl methacrylate.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Tech Co Ltd

Inventors

• Li Zhao
• Tsai Pao Ming
• Shi Shiming

Classifications

• H10K50/844

  Encapsulations · CPC title

• H10K50/86

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

• H10K71/00

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

• H10K59/8791

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

• H10K59/873

  Encapsulations · CPC title