System and method for manufacturing display unit

Patent metadata

Field	Value
Publication number	US-10427396-B2
Application number	US-201715605416-A
Country	US
Kind code	B2
Filing date	May 25, 2017
Priority date	May 31, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

According to an exemplary embodiment of the present invention, there is provided a system for manufacturing a display unit, which includes: a carrying unit configured to carry an optical film, wherein the optical film includes a release film which is extended in a longitudinal direction, and a plurality of sheet pieces of a polarizing film which are arranged in a longitudinal direction and include adhesive layers, wherein the sheet piece of a polarizing film is adhered to the release film through the adhesive layer so that the polarizing film sheet piece is peeled from the release film; a peeling unit configured to fold back inwardly the release film of the optical film carried by the carrying unit toward an inner side and peel the polarizing film sheet piece from the release film; a winding unit configured to wind the release film peeled by the peeling unit; and an attachment unit configured to attach the polarizing film sheet piece peeled from the release film to one surface of a panel, while carrying the panel, the system including: a controller configured to adjust a position of a peeling point, at which the polarizing film sheet piece is peeled from the release film, by controlling the winding unit and the carrying unit.

First claim

The invention claimed is:

1. A system for manufacturing a display unit, which comprises:
a carrying unit configured to carry an optical film, wherein the optical film includes a release film which is extended in a longitudinal direction, and a plurality of sheet pieces of a polarizing film which are arranged in a longitudinal direction and include adhesive layers, wherein the sheet piece of a polarizing film is adhered to the release film through the adhesive layer so that the polarizing film sheet piece is peeled from the release film;
a peeling unit configured to fold back inwardly the release film of the optical film carried by the carrying unit toward an inner side and peel the polarizing film sheet piece from the release film;
a winding unit configured to wind the release film peeled by the peeling unit; and
an attachment unit configured to attach the polarizing film sheet piece peeled from the release film to one surface of a panel, while carrying the panel,
the system comprising: a controller configured to adjust a position of a peeling point, at which the polarizing film sheet piece is peeled from the release film, by controlling the winding unit and the carrying unit, and
wherein the shortest distance between one surface of the panel carried to the attachment unit and the peeling point is 0.1 to 150 mm.

2. The system of claim 1 , wherein a distance L between the peeling point and an attachment point, at which the polarizing film sheet piece peeled from the release film is attached to the panel, as calculated by Equation 1 below, is 27.5 mm:

L
=

a

cos
⁢

⁢
Θ

,

[

Equation
⁢

⁢
1

]

wherein a is a radius of an attachment roll positioned on one surface of the panel, and Θ is an angle between the polarizing film sheet piece carried to the attachment roll and the panel carried to the attachment roll.

3. The system of claim 2 , wherein a is 10 to 20 mm, and Θ is 10 to 40°.

4. The system of claim 1 , wherein a horizontal distance between the peeling point and the attachment point, at which the polarizing film sheet piece peeled from the release film is attached to the panel is a to 2a, when a radius of the attachment roll positioned on one surface of the panel is a.

5. The system of claim 1 , wherein, when a carrying speed of the optical film by the carrying unit is V1 and a winding speed of the release film by the winding unit is V2, V1>V2 until the peeling point is shifted to a target peeling position which is spaced apart from the leading end of the peeling unit in a direction of the attachment unit by a predetermined interval.

6. The system of claim 5 , wherein V1=V2 when the peeling point is shifted to the target peeling position.

7. A method of manufacturing a display unit, which comprises:
carrying an optical film, wherein the optical film includes a release film which is extended in a longitudinal direction, and a plurality of sheet pieces a polarizing film, which are arranged in a longitudinal direction and include adhesive layers, wherein the sheet piece of a polarizing film is adhered to the release film through the adhesive layer so that the sheet piece of a polarizing film is peeled from the release film, wherein the carrying is conducted by a carrying unit;
peeling the sheet piece of a polarizing film from the release film by folding back inwardly the release film of the optical film carried by the carrying unit toward an inner side, wherein the peeling is conducted by a peeling unit;
winding the release film peeled by the peeling unit, wherein the winding unit is conducted by a winding unit; and
attaching the sheet piece of a polarizing film peeled from the release film to one surface of a panel, while carrying the panel, wherein the attaching is conducted by a attachment unit,
the method comprising: controlling the winding unit and the carrying unit so that a position of a peeling point, at which the sheet piece of a polarizing film is peeled from the release film, is adjusted,
wherein the controlling controls the winding unit and the carrying unit so that a shortest distance between one surface of the carried panel and the peeling point is 0.1 to 150 mm.

8. The method of claim 7 , wherein the controlling controls the winding unit and the carrying unit so that a distance between the peeling point and an attachment point, at which the polarizing film sheet piece peeled from the release film is attached to the panel, is L calculated by Equation 1 below to 27.5 mm,

L
=

a

cos
⁢

⁢
Θ

[

Equation
⁢

⁢
1

]

wherein a is a radius of an attachment roll positioned on one surface of the panel, and Θ is an angle between the polarizing film sheet piece carried to the attachment roll and the panel carried to the attachment roll.

9. The method of claim 8 , wherein a is 10 to 20 mm, and Θ is 10 to 40°.

10. The method of claim 7 , wherein the controlling controls the winding unit and the carrying unit so that a horizontal distance between the peeling point and the attachment point, at which the polarizing film sheet piece peeled from the release film is attached to the panel is a to 2a, when a radius of the attachment roll positioned on one surface of the panel is a.

11. The method of claim 7 , wherein the controlling controls the winding unit and the carrying unit so that V1>V2 until the peeling point is shifted to a target peeling position which is spaced apart from the leading end of the peeling unit in a direction of the attachment unit by a predetermined interval, when a carrying speed of the optical film by the carrying unit is V1 and a winding speed of the release film is V2.

12. The method of claim 11 , wherein the controlling controls the winding unit and the carrying unit are controlled so that V1=V2 when the peeling point is shifted to the target peeling position.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Beom Seok
• Lee Suk Jae
• Park Kyung Hyeok
• Park San
• Choi Hang Suk
• Jang Eung Jin
• Jeung Bong Su
• Ryoo Jea Han

Classifications

• B32B2457/20

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

• B32B38/18

  Handling of layers or the laminate · CPC title

• B32B41/00 Primary

  Arrangements for controlling or monitoring lamination processes; Safety arrangements · CPC title

• C09J2203/318

  for the production of liquid crystal displays · CPC title

• B32B2037/268

  Release layers · CPC title