Method for manufacturing flexible display panel and flexible display device

Patent metadata

Field	Value
Publication number	US-9634270-B2
Application number	US-201414769332-A
Country	US
Kind code	B2
Filing date	Oct 17, 2014
Priority date	Jul 22, 2014
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A method for manufacturing a flexible display panel and the flexible display device are disclosed. The method for manufacturing the flexible display panel includes: forming a substrate, a flexible display and an overcoat layer on a support substrate in sequence; flipping over so that one side provided with the support substrate is placed upward; stripping off the support substrate; coating a curable material on a surface obtained after the support substrate is stripped off; and performing a curing process so that the coated curable material is cured to form a protective film. The method for manufacturing the flexible display panel can form the protective film without adopting laminating/bonding devices, is simple and easy, and does not require the vacuum defoamation process subsequently.

First claim

The invention claimed is:

1. A method for manufacturing a flexible display panel, comprising:
forming a laminated layer of a substrate, a flexible display, and an overcoat layer on a support substrate in sequence;
flipping over so that one side provided with the support substrate is placed upward and the laminated layer of the substrate, the flexible display, and the overcoat layer is placed downward;
stripping off the support substrate;
coating a curable material directly in situ on a surface of the laminated layer of the substrate, the flexible display, and the overcoat layer after the support substrate is stripped off; and
performing a curing process so that the coated curable material is cured to form a protective film.

2. The manufacturing method according to claim 1 , wherein the curable material is a photocurable material, and the curing process is correspondingly light illumination.

3. The manufacturing method according to claim 2 , wherein the photocurable material is an unsaturated polyester resin.

4. The manufacturing method according to claim 2 , wherein in coating the curable material on the surface after the support substrate is stripped off, setting a coating thickness of the curable material according to following requirement:
the protective film formed after the curable material is cured provides that the flexible display is disposed at a neutral layer of the entire flexible display panel.

5. The manufacturing method according to claim 2 , further comprising sucking the flexible display panel by a vacuum suction arm.

6. The manufacturing method according to claim 2 , wherein in coating the curable material on the surface after the support substrate is stripped off, performing an adopted coating method including spin-coating or slot coating.

7. The manufacturing method according to claim 1 , wherein the curable material is a thermosetting material, and the curing process is correspondingly a heat treatment process.

8. The manufacturing method according to claim 7 , wherein in coating the curable material on the surface after the support substrate is stripped off, setting a coating thickness of the curable material according to following requirement:
the protective film formed after the curable material is cured provides that the flexible display is disposed at a neutral layer of the entire flexible display panel.

9. The manufacturing method according to claim 7 , further comprising sucking the flexible display panel by a vacuum suction arm.

10. The manufacturing method according to claim 7 , wherein in coating the curable material on the surface after the support substrate is stripped off, performing an adopted coating method including spin-coating or slot coating.

11. The manufacturing method according to claim 1 , wherein in coating the curable material on the surface after the support substrate is stripped off, setting a coating thickness of the curable material according to following requirement:
the protective film formed after the curable material is cured provides that the flexible display is disposed at a neutral layer of the entire flexible display panel.

12. The manufacturing method according to claim 1 , further comprising sucking the flexible display panel by a vacuum suction arm.

13. The manufacturing method according to claim 1 , wherein in coating the curable material on the surface after the support substrate is stripped off, performing an adopted coating method including spin-coating or slot coating.

14. The manufacturing method according to claim 1 , wherein stripping off the support substrate is performed using a laser lift-off (LLO) technology.

15. The manufacturing method according to claim 1 , further comprising preparing the substrate by polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polycarbonate (PC), polyethersulfone (PES) or polymethyl methacrylate (PMMA).

16. A flexible display device, comprising the flexible display panel manufactured by the manufacturing method according to claim 1 .

17. A method for manufacturing a flexible display panel, comprising:
forming a laminated layer of a substrate, a flexible display, and an overcoat layer on a support substrate in sequence;
flipping over the laminated layer and sucking the laminated layer from beneath by a suction device, so that one side provided with the support substrate is placed upward and the laminated layer of the substrate, the flexible display, and the overcoat layer is placed downward;
stripping off the support substrate;
coating a curable material on a surface of the laminated layer of the substrate, which is sucked by the suction device, the flexible display, and the overcoat layer after the support substrate is stripped off; and
performing a curing process so that the coated curable material is cured to form a protective film.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Liu Lu
• Hsieh Ming Che
• Xie Chunyan
• Sun Tao

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K77/111

  Flexible substrates · CPC title

• H10K71/80 Primary

  using temporary substrates · CPC title

• H01L51/003

  Electricity · mapped topic

• H01L27/3244

  Electricity · mapped topic