Display module and manufacturing method of the same

Patent metadata

Field	Value
Publication number	US-12369452-B2
Application number	US-202217746430-A
Country	US
Kind code	B2
Filing date	May 17, 2022
Priority date	Aug 25, 2021
Publication date	Jul 22, 2025
Grant date	Jul 22, 2025

Abstract

A display module includes a base layer including a first portion including a light emitting device, a second portion including a circuit board electrically connected to the second portion, and a third portion disposed between the first portion and the second portion, the third portion being bent, a light emitting device layer overlapping the first portion in a plan view and disposed on an upper surface of the first portion of the base layer, a protective film disposed on a lower surface of the base layer, the protective film including an opening overlapping the third portion of the base layer in a plan view, and a first protective layer disposed on a lower surface of the third portion and overlapping the opening of the protective film in a plan view, wherein a modulus of the first protective layer is about 10 6 Pa or higher than about 10 6 Pa.

First claim

What is claimed is:

1. A display module comprising:
a base layer including a first portion including a light emitting device, a second portion including a circuit board electrically connected to the second portion, and a third portion disposed between the first portion and the second portion, the third portion being bent;
a light emitting device layer overlapping the first portion in a plan view and disposed on an upper surface of the first portion of the base layer;
a protective film disposed on a lower surface of the base layer, the protective film including an opening overlapping the third portion of the base layer in the plan view; and
a first protective layer disposed on a lower surface of the third portion, the first protective layer overlapping the opening of the protective film in the plan view and contacting inner lateral sides of the protective film in the opening,
wherein a modulus of the first protective layer is in a range of about 10 6 Pa or higher.

2. The display module of claim 1 , wherein the first protective layer comprises at least one of an acrylic resin, an epoxy-based resin, and a silicon-based resin.

3. The display module of claim 1 , further comprising:
a second protective layer disposed on an upper surface of the third portion of the base layer.

4. A method for manufacturing a display module, the method comprising:
providing a base layer including a first portion, a second portion, and a third portion disposed between the first portion and the second portion, the third portion including flexibility;
providing a light emitting device on an upper surface of the first portion of the base layer;
providing a resin composition on a lower surface of the third portion of the base layer;
curing the resin composition by a first method to form a first cured product;
bending, after curing the resin composition by the first method, the third portion of the base layer such that the first portion of the base layer and the second portion of the base layer face each other; and
curing, after bending the third portion of the base layer, the first cured product by a second method different from the first method to form a second cured product,
wherein the resin composition includes a first reactant activated by the first method and a second reactant activated by the second method.

5. The method of claim 4 , wherein a modulus of the first cured product is lower than a modulus of the second cured product.

6. The method of claim 4 , wherein a modulus of the resin composition is in a range of about 10 3 Pa or lower.

7. The method of claim 4 , wherein a modulus of the first cured product is in a range of about 10 4 Pa or lower.

8. The method of claim 4 , wherein a modulus of the second cured product is in a range of about 10 6 Pa or higher.

9. The method of claim 4 , further comprising:
providing signal lines to the first portion, the second portion, and the third portion after the providing of the light emitting device and before the providing of the resin composition,
wherein the signal lines overlap at least a portion of the second cured product in a plan view.

10. The method of claim 4 , further comprising:
a step of providing a protective film below the base layer before the providing of the resin composition, wherein
the protective film includes an opening overlapping at least a portion of the third cured product in a plan view, and
the providing of the resin composition includes providing the resin composition in the opening of the protective film.

11. The method of claim 4 , wherein
the first method is UV curing, and
the second method is thermal curing or natural curing.

12. The method of claim 4 , wherein the first reactant comprises a photoinitiator or a latent catalyst.

13. The method of claim 4 , wherein the second reactant comprises a thermal initiator, a material containing an isocyanate group, or a silicon-based material.

14. The method of claim 4 , wherein
the first reactant comprises an acrylic monomer, an acrylic oligomer, and an acrylic radical photoinitiator, and
the second reactant comprises a urethane-based material containing an isocyanate group.

15. The method of claim 4 , wherein
the first reactant comprises an acrylic monomer, an acrylic oligomer, and an acrylic radical photoinitiator, and
the second reactant comprises an epoxy-based monomer, an epoxy-based oligomer, and an epoxy-based anion thermal initiator.

16. The method of claim 4 , wherein
the first reactant comprises an acrylic monomer, an acrylic oligomer, and an acrylic radical photoinitiator, and
the second reactant comprises an acrylic monomer, an acrylic oligomer, and an acrylic thermal initiator.

17. The method of claim 4 , wherein
the first reactant comprises an epoxy-based monomer, an epoxy-based oligomer, and an epoxy-based cation photoinitiator, and
the second reactant comprises an epoxy-based monomer, an epoxy-based oligomer, and an epoxy-based cation thermal initiator.

18. The method of claim 4 , wherein
the first reactant comprises a latent catalyst and an inhibitor, and
the second reactant comprises a silicon-based monomer and a silicon-based oligomer.

19. The method of claim 4 , further comprising:
providing a circuit board to the second portion before the providing of the resin composition.

20. An electronic device comprising:
a display module;
a window disposed on the display module; and
a housing disposed under the display module, wherein
the display module comprises:
a base layer including a first portion including a light emitting device, a second portion including a circuit board electrically connected to the second portion, and a third portion disposed between the first portion and the second portion, the third portion being bent;
a light emitting device layer overlapping the first portion in a plan view and disposed on an upper surface of the first portion of the base layer;
a protective film disposed on a lower surface of the base layer, the protective film including an opening overlapping the third portion of the base layer in the plan view; and
a first protective layer disposed on a lower surface of the third portion, the first protective layer overlapping the opening of the protective film in the plan view and contacting inner lateral sides of the protective film in the opening, and
a modulus of the first protective layer is in a range of about 10 6 Pa or higher.

Assignees

• Samsung Display Co Ltd

Inventors

• Cho Yunjeong
• Lee Daewoo
• Chae Kyunghoon
• Hwang Hyeon Deuk
• Ryu Dohyung

Classifications

• H10K2102/311

  Flexible OLED · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K71/00

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

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• C09D175/00

  Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers · CPC title