Display module

Patent metadata

Field	Value
Publication number	US-11731395-B2
Application number	US-202117242745-A
Country	US
Kind code	B2
Filing date	Apr 28, 2021
Priority date	Aug 27, 2020
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A display module includes a display panel which is bent at opposing ends thereof and includes a flat area and a bent area which extends bent from the flat area, a panel protective film facing both the flat area and the bent area of the display panel, and a release film removably attached to the panel protective film. The release film includes a first release film facing both the flat area and the bent area of the display panel with the panel protective film therebetween, a second release film facing the display panel with the first release film therebetween, a third release film between the first release film and the second release film and corresponding to the bent area, and a first adhesive layer between the third release film and the second release film and attaches the third release film to the second release film.

First claim

What is claimed is:

1. A display module comprising:
a display panel which is bent at opposing ends thereof, the display panel including a flat area and a bent area which extends bent from the flat area;
a panel protective film which faces both the flat area and the bent area of the display panel; and
a release film which is removably attached to the panel protective film, the release film comprising:
a first release film which faces both the flat area and the bent area of the display panel with the panel protective film therebetween;
a second release film which faces the display panel with the first release film therebetween;
a third release film which is between the first release film and the second release film and corresponds to the bent area; and
a first adhesive layer which is between the third release film and the second release film and attaches the third release film to the second release film.

2. The display module of claim 1 , wherein at the bent area of the display panel, the third release film directly contacts the first release film.

3. The display module of claim 2 , wherein at the bent area of the display panel, the third release film is unattached to the first release film.

4. The display module of claim 1 , wherein at the bent area of the display panel, the third release film is spaced apart from the first release film.

5. The display module of claim 1 , wherein the first adhesive layer includes:
a first portion which directly contacts the first release film, and
a second portion which is connected to the first portion and directly contacts the third release film.

6. The display module of claim 5 , wherein
the first portion of the first adhesive layer attaches the first release film to the second release film, and
the second portion of the first adhesive layer attaches the third release film to the second release film.

7. The display module of claim 5 , wherein
the first portion of the first adhesive layer corresponds to the flat area, and
the second portion of the first adhesive layer corresponds to the bent area.

8. The display module of claim 1 , wherein
each of the third release film and the first release film has a thickness, and
the thickness of the third release film is less than the thickness of the first release film.

9. The display module of claim 1 , further comprising a second adhesive layer between the panel protective film and the first release film and attaches the panel protective film to the first release film,
wherein
the second adhesive layer has an adhesive force with the panel protective film and an adhesive force with the first release film, and
the adhesive force of the second adhesive layer with the panel protective film is less than the adhesive force of the second adhesive layer with the first release film.

10. The display module of claim 1 , wherein
the display panel further includes a sensing area in the flat area at which an external input to the display module is sensable, and
the panel protective film defines an opening which corresponds to the sensing area and exposes the display panel to outside the panel protective film,
further comprising an impact-absorbing pattern which protrudes from the panel protective film in a direction away from the display panel and extends along the opening of the panel protective film.

11. The display module of claim 10 , wherein
the first release film defines an opening which corresponds to the opening of the panel protective film, and
the impact-absorbing pattern is in the opening of the first release film.

12. The display module of claim 11 , wherein the impact-absorbing pattern extends from the opening of the first release film and further than the first release film in the direction away from the display panel.

13. The display module of claim 12 , wherein
the impact-absorbing pattern which extends along the opening of the panel protective film forms a step with the panel protective film,
the release film further comprises a step-difference compensation film which is between the first adhesive layer and the second release film and defines an opening which corresponds to the opening of the panel protective film, and
the impact-absorbing pattern is in the opening of the step-difference compensation film.

14. The display module of claim 10 , wherein at the flat area of the display panel, the second release film extends across the opening of the panel protective film and disposes both the impact-absorbing pattern and the first release film between the display panel and the second release film.

15. The display module of claim 10 , wherein the third release film is spaced apart from the impact-absorbing pattern in a direction along the panel protective film.

16. The display module of claim 10 , the release film further comprises a fourth release film which faces the impact-absorbing pattern with the second release film therebetween and corresponds to the opening of the panel protective film.

17. The display module of claim 16 , wherein the fourth release film which corresponds to the opening of the panel protective film includes a light blocking material.

18. The display module of claim 1 , wherein
the display panel further includes a boundary between the flat area and the bent area, and
the second release film and the third release film together define a plurality of grooves arranged spaced apart from each other along the boundary between the flat area and the bent area.

19. The display module of claim 18 , wherein at the flat area of the display panel, each of the plurality of grooves corresponds to the panel protective film.

20. The display module of claim 18 , wherein each of the plurality of grooves exposes the first release film to outside the release film.

Assignees

• Samsung Display Co Ltd

Inventors

• Ryu Dohyung
• Jung Wu Hyeon
• Hwang Daehyun

Classifications

• H10K59/10

  OLED displays · CPC title

• H10K50/8426 Primary

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• B32B7/06 Primary

  permitting easy separation · CPC title