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

Patent metadata

Field	Value
Publication number	US-10076900-B2
Application number	US-201515117423-A
Country	US
Kind code	B2
Filing date	Mar 17, 2015
Priority date	Aug 14, 2014
Publication date	Sep 18, 2018
Grant date	Sep 18, 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 guide unit;
a fixing unit combined with a front part of the guide unit;
a roller installed rotatably on the fixing unit and configured to come in direct contact with the polarizing film and configured to prevent fracture of the polarizing film being peeled, the roller having a radius ranging from 4 mm to 30 mm; and
a magnetic unit mounted apart from the roller and configured to prevent a rotation axis of the roller from sagging,
wherein the fixing unit includes an inclined surface configured to connect an upper part of the roller with the guide unit, and an inclined angle of the inclined surface is in a range from 20 degrees to 40 degrees.

2. The peeling bar of claim 1 , wherein the roller is combined with the fixing unit through a bearing and a washer.

3. 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 clamper configured to clamp a part of the polarizing film 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; and
a controller configured to move at least one of the stage and the clamper to peel the polarizing film such that tension is uniformly applied to the polarizing film by preventing stress concentration at a peeling position of the polarizing film.

4. The peeling apparatus of claim 3 , wherein the controller is further configured to rotate at least one of the stage, the peeling bar and the clamper and thereby to make both widthwise ends of the peeled polarizing film closely adhere to the peeling bar such that tension is applied uniformly to the polarizing film at the peeling position.

5. The peeling apparatus of claim 3 , wherein the stage is installed to be freely rotated by an external force, and wherein the stage is rotated by tension applied to the polarizing film, and thereby both ends of the peeled polarizing film closely adhere to the peeling bar such that tension is applied uniformly to the polarizing film at the peeling position.

6. The peeling apparatus of claim 3 , wherein the controller is further configured to move at least one of the stage and the clamper and thereby to make both ends of the peeled polarizing film closely adhere to the peeling bar such that tension is applied uniformly to the polarizing film at the peeling position.

7. The peeling apparatus of claim 3 , further comprising:
an accelerant spray unit configured to spray a peeling accelerant to the peeling position.

8. The peeling apparatus of claim 7 , wherein the stage includes an accelerant storage configured to prevent the peeling accelerant from seeping.

9. The peeling apparatus of claim 3 , wherein the stage includes a plurality of flat-type heaters configured to apply heat uniformly to an entire surface thereof.

10. The peeling apparatus of claim 3 , wherein the peeling bar is adjustable in height.

11. The peeling apparatus of claim 3 , wherein the clamper is configured to adjust a peeling load applied to the polarizing film in a peeling process.

12. 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 a peeled polarizing film to a clamper after the part of the polarizing film is peeled from the panel, wherein a peeling bar of claim 1 is located at a peeling position, and wherein the peeled polarizing film is in contact with a roller of the peeling bar; and
peeling the polarizing film by moving at least one of the clamper and the stage.

13. The peeling method of claim 12 , wherein the peeling step includes rotating at least one of the stage, the peeling bar and the clamper, and thereby making both ends of the peeled polarizing film closely adhere to the peeling bar such that tension is applied uniformly to the polarizing film at the peeling position.

14. The peeling method of claim 12 , 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 polarizing film, and thereby allowing both ends of the peeled polarizing film to closely adhere to the peeling bar such that tension is applied uniformly to the polarizing film at the peeling position.

15. The peeling method of claim 12 , wherein the peeling step includes moving at least one of the stage and the clamper, and thereby making both ends of the peeled polarizing film closely adhere to the peeling bar such that tension is applied uniformly to the polarizing film at the peeling position.

16. The peeling method of claim 12 , wherein the peeling step includes spraying a peeling accelerant to the peeling position.

17. The peeling method of claim 12 , 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 Sukjae
• Kim Kyoung Sik

Classifications

• B32B37/003

  to avoid air inclusion · CPC title

• Y10T156/195

  Delaminating roller means · CPC title

• Y10T156/1168

  Gripping and pulling work apart during delaminating · CPC title

• Y10S156/93

  Semiconductive product delaminating, e.g. delaminating emiconductive wafer from underlayer · CPC title

• B65H2801/61

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