Method of peeling off protective film and a method of manufacturing a display device

Patent metadata

Field	Value
Publication number	US-11433657-B2
Application number	US-202016797860-A
Country	US
Kind code	B2
Filing date	Feb 21, 2020
Priority date	Mar 13, 2019
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

A method of peeling off the protective film includes: providing a panel lower sheet, where a protective film is provided on one surface of the plane lower sheet and the protective film has a bending line extending in a first direction parallel to opposing sides thereof; gripping a portion of the protective film; moving the gripped portion of the protective film in a second direction which is a thickness direction thereof; and moving the panel lower sheet in a third direction perpendicular to the bending line.

First claim

What is claimed is:

1. A method of peeling off a protective film, the method comprising:
providing a panel lower sheet, wherein a protective film is provided on one surface of the panel lower sheet, and the protective film has a bending line extending in a first direction parallel to opposing sides of the protective film;
gripping a portion of the protective film;
moving the gripped portion of the protective film in a second direction; and
moving the panel lower sheet in a third direction perpendicular to the bending line,
wherein the second direction intersects with a plane defined by the first direction and the third direction, the plane corresponding to a plane defining the gripped portion of the protective film, and
the third direction is in a direction toward the gripped portion of the protective film.

2. The method of claim 1 , wherein the providing the panel lower sheet comprises pre-forming the panel lower sheet in a set shape such that the bending line is formed.

3. The method of claim 1 , wherein the gripping of the portion of the protective film comprises gripping the portion of the protective film using a clamping device in a way such that one side of the clamping device is parallel to the bending line.

4. The method of claim 3 , wherein the protective film comprises a cover portion which overlaps the panel lower sheet in the second direction.

5. The method of claim 4 , wherein
a pull tab portion is defined at one end of the cover portion, and
the clamping device grips the pull tab portion.

6. The method of claim 4 , wherein the protective film further comprises a grip portion which does not overlap the panel lower sheet in the second direction and extends outward from the panel lower sheet.

7. The method of claim 6 , wherein a boundary line between the cover portion and the grip portion is parallel to the bending line.

8. The method of claim 6 , wherein a length of one side of the clamping device in the first direction is greater than a length of one side of the grip portion in the first direction.

9. The method of claim 3 , wherein the clamping device is rotatable about one axis.

10. The method of claim 1 , wherein the moving of the panel lower sheet comprises supporting and fixing the one surface of the panel lower sheet by a vacuum suction device.

11. The method of claim 10 , wherein the moving of the panel lower sheet further comprises moving the vacuum suction device in the third direction.

12. The method of claim 1 , wherein the protective film comprises a film layer and an adhesive layer.

13. The method of claim 12 , wherein
the film layer is attached to the one surface of the panel lower sheet via the adhesive layer, and
a bonding force of the adhesive layer to the one surface of the panel lower sheet is less than a bonding force of the adhesive layer to the film layer.

14. The method of claim 1 , wherein the panel lower sheet comprises a flat portion and a bending portion.

15. The method of claim 14 , wherein an angle formed between one surface of the flat portion and one surface of the bending portion is in a range of about 90° to about 120°.

16. A method of manufacturing a display device, the method comprising:
providing a panel lower sheet, wherein a protective film is provided on one surface of the panel lower sheet and the protective film is pre-formed to have a bending line extending in a first direction parallel to opposing sides of the protective film;
peeling off the protective film; and
after the peeling off of the protective film, attaching a display panel to the one surface of the panel lower sheet,
wherein the peeling off of the protective film comprises:
gripping a portion of the protective film using a clamping device in a way such that one side of the clamping device is parallel to the bending line,
moving the gripped portion of the protective film in a second direction, and
moving the panel lower sheet in a third direction perpendicular to the bending line,
wherein the second direction intersects with a plane defined by the first direction and the third direction, the plane corresponding to a plane defining the gripped portion of the protective film, and
the third direction is in a direction toward the gripped portion of the protective film.

17. The method of claim 16 , wherein the protective film comprises a cover portion which overlaps the panel lower sheet in the second direction.

18. The method of claim 17 , wherein the protective film further comprises a grip portion which does not overlap the panel lower sheet in the second direction and extends outward from the panel lower sheet.

19. The method of claim 18 , wherein a boundary between the cover portion and the grip portion is parallel to the bending line.

20. The method of claim 19 , wherein a length of one side of the clamping device in the first direction is greater than a length of one side of the grip portion in the first direction.

Assignees

• Samsung Display Co Ltd

Inventors

• Jung Wu Hyeon
• Ryu Do Hyung
• Bak Dae Yang
• Hwang Dae Hyun

Classifications

• B65H2701/1752

  Polymer film · CPC title

• B65H2701/1726

  including detachable components · CPC title

• B65H2301/51122

  peeling layer of material · CPC title

• B65H29/54

  Article strippers, e.g. for stripping from advancing elements · CPC title

• B65H41/00 Primary

  Machines for separating superposed webs · CPC title