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

Patent metadata

Field	Value
Publication number	US-10870267-B2
Application number	US-201514782106-A
Country	US
Kind code	B2
Filing date	May 29, 2015
Priority date	Aug 14, 2014
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

The present invention relates to a peeling bar, apparatus, and method for peeling a polarizing film from a panel. This invention can minimize friction between the peeling bar and the polarizing film since the peeled polarizing film is in contact with a front part of the peeling bar. The radius of a curved surface at the tip of the front part and an inclined upper surface of the front part are designed to minimize the Z-axis component of a shearing force applied to the polarizing film. Also, in order to equalize tension applied to the polarizing film in a peeling process, this invention makes both ends of the polarizing film closely adhere to the peeling bar. 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 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 after it is peeled from the panel;
a 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 lower and upper surfaces are connected with each other by the tip forming a curved surface of circular form having a diameter,

wherein the peeling bar is configured to be moved on the polarizing film when the polarizing film is peeled from the panel;
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, and
wherein the stage includes a plurality of flat-type heaters configured to apply heat uniformly to an entire surface thereof.

2. The peeling apparatus of claim 1 , 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 ends of the polarizing film closely adhere to the peeling bar such that tension is applied uniformly to the polarizing film at the peeling position.

3. The peeling apparatus of claim 1 , 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 closely adhere to the peeling bar such that tension is applied uniformly to the polarizing film at the peeling position.

4. The peeling apparatus of claim 1 , 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.

5. The peeling apparatus of claim 1 , further comprising:
an accelerant spray unit configured to spray a peeling accelerant to the peeling position.

6. The peeling apparatus of claim 5 , wherein the stage includes an accelerant storage configured to prevent the peeling accelerant from seeping.

7. The peeling apparatus of claim 1 , wherein the clamper is configured to adjust a peeling load applied to the polarizing film in a peeling process.

8. 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 after it is peeled from the panel;
a 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 lower and upper surfaces are connected with each other by the tip forming a curved surface of circular form having a diameter,

wherein the peeling bar is configured to be moved on the polarizing film when the polarizing film is peeled from the panel, wherein the peeling bar is adjustable in height; 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.

9. 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 polarizing film to a clamper after the part of the polarizing film has been peeled from the panel,
wherein a peeling bar adjustable in height is located at a peeling position, 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 lower and upper surfaces are connected with each other by the tip forming a curved surface of circular form having a diameter, and

wherein the peeled polarizing film is in contact with a front part of the peeling bar; and
peeling the polarizing film by moving at least one of the clamper and the stage, while keeping the polarizing film in contact with the front part of the peeling bar to reduce stress concentration at a peeling position of the polarizing film.

10. The peeling method of claim 9 , 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.

11. The peeling method of claim 9 , 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 closely adhere to the peeling bar such that tension is applied uniformly to the polarizing film at the peeling position.

12. The peeling method of claim 9 , 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.

13. The peeling method of claim 9 , wherein the peeling step includes spraying a peeling accelerant to the peeling position.

14. The peeling method of claim 9 , 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

• Y10S156/941

  Means for delaminating semiconductive product · CPC title

• B32B2307/42

  Polarizing, birefringent, filtering · CPC title

• Y10T156/1933

  Spraying delaminating means [e.g., atomizer, etc. · CPC title

• Y10T156/1978

  Delaminating bending means · CPC title

• Y10T156/1168

  Gripping and pulling work apart during delaminating · CPC title