Peeling bar for peeling polarizing film from panel, peeling apparatus and peeling method using the same

Patent metadata

Field	Value
Publication number	US-10029450-B2
Application number	US-201515320140-A
Country	US
Kind code	B2
Filing date	Mar 17, 2015
Priority date	Aug 14, 2014
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

According to this invention, fracture of the polarizing film is prevented, and thereby the polarizing film can be stably peeled from the panel without fracture.

First claim

The invention claimed is:

1. A peeling bar for peeling a polarizing film from a panel, the peeling bar comprising:
a body part having a top surface and a bottom surface; and
a front part protruded from the body part and having a lower surface, an upper surface, and a tip, wherein the lower surface is extended from the bottom surface of the body part forming the same surface, wherein the upper surface is inclined downwardly from the top surface of the body part, and wherein the tip connects the lower and upper surfaces, forming a curved surface, and has a plurality of grooves formed therein extending along the width of the curved surface.

2. The peeling bar of claim 1 , wherein the curved surface at the tip is a circular form having a predetermined radius.

3. The peeling bar of claim 2 , wherein a radius of the curved surface at the tip ranges from 4 mm to 30 mm.

4. The peeling bar of claim 1 , wherein an inclined angle at the upper surface of the front part ranges from 20 degrees to 40 degrees.

5. The peeling bar of claim 1 , wherein the front part is formed of engineering plastic, or surfaces of the front part are coated with fluorine.

6. A peeling apparatus for peeling a polarizing film from a panel, the peeling apparatus comprising:
a stage configured to place thereon the panel having the polarizing film attached thereto;
a damper configured to clamp a part of the polarizing film after it is peeled from the panel;
a peeling bar set forth in claim 1 , wherein the peeling bar is configured to be moved on the polarizing film being peeled when the polarizing film is peeled from the panel; and
a controller configured to move at least one of the stage and the damper to peel the polarizing film such that tension force is uniformly applied to the polarizing film by preventing stress concentration at a peeling position of the polarizing film.

7. The peeling apparatus of claim 6 , wherein the controller is further configured to rotate at least one of the stage, the peeling bar and the damper and thereby to make both ends of the peeled polarizing film adhere to the peeling bar such that tension is applied uniformly to the polarizing film at the peeling position.

8. The peeling apparatus of claim 6 , wherein the stage is installed to be freely rotated by an external force, and wherein the stage is rotated by tension applied to the peeled polarizing film, and thereby both ends of the peeled polarizing film adhere to the peeling bar such that tension force is applied uniformly to the polarizing film at the peeling position.

9. The peeling apparatus of claim 6 , wherein the controller is further configured to move at least one of the stage and the damper and thereby to make both ends of the peeled polarizing film adhere to the peeling bar such that tension force is applied uniformly to the polarizing film at the peeling position.

10. The peeling apparatus of claim 6 , further comprising:
an accelerant spray unit configured to spray a peeling accelerant to the peeling position.

11. The peeling apparatus of claim 10 , wherein the stage includes an accelerant storage configured to prevent the peeling accelerant from seeping.

12. The peeling apparatus of claim 6 , wherein the stage includes a plurality of flat-type heaters configured to apply heat uniformly to an entire surface thereof.

13. The peeling apparatus of claim 6 , wherein the peeling bar is adjustable in height.

14. The peeling apparatus of claim 6 , wherein the damper is configured to adjust a peeling load applied to the polarizing film in a peeling process.

15. A peeling method for peeling a polarizing film from a panel, the peeling method comprising steps of:
placing on a stage the panel having the polarizing film attached thereto;
fixing a part of the peeled polarizing film to a damper after the part of the polarizing film is peeled from the panel, wherein a peeling bar set forth in claim 1 is located at a peeling position, and wherein the peeled polarizing film is in contact with a tip of a front part of the peeling bar; and
peeling the polarizing film by moving at least one of the damper and the stage.

16. The peeling method of claim 15 , wherein the peeling step includes rotating at least one of the stage, the peeling bar and the damper, and thereby making both ends of the peeled polarizing film adhere to the peeling bar such that tension force is applied uniformly to the polarizing film at the peeling position.

17. The peeling method of claim 15 , wherein the peeling step includes, when the stage is installed to be freely rotated by an external force, allowing the stage to be rotated by tension applied to the peeled polarizing film, and thereby allowing both ends of the peeled polarizing film to adhere to the peeling bar such that tension force is applied uniformly to the polarizing film at the peeling position.

18. The peeling method of claim 15 , wherein the peeling step includes moving at least one of the stage and the damper, and thereby making both ends of the peeled polarizing film adhere to the peeling bar such that tension force is applied uniformly to the polarizing film at the peeling position.

19. The peeling method of claim 15 , wherein the peeling step includes spraying a peeling accelerant to the peeling position.

20. The peeling method of claim 15 , wherein at least one of the fixing step and the peeling step includes applying heat to the panel through a plurality of flat-type heaters installed to apply heat uniformly to an entire surface of the stage.

Assignees

• Lg Chemical Ltd

Inventors

• Park San
• Jeung Bong Su
• Ryoo Jea Han
• Park Cheon Ho
• Lee Suk Jae
• Kim Kyoung Sik

Classifications

• B32B38/10

  Removing layers, or parts of layers, mechanically or chemically · CPC title

• B65H41/00 Primary

  Machines for separating superposed webs · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• Y10T156/1978

  Delaminating bending means · CPC title

• B65H2801/61

  Display device manufacture, e.g. liquid crystal displays · CPC title