System and method for manufacturing display unit

Patent metadata

Field	Value
Publication number	US-10245819-B2
Application number	US-201715617280-A
Country	US
Kind code	B2
Filing date	Jun 8, 2017
Priority date	Jul 8, 2016
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A system for manufacturing a display unit according to an exemplary embodiment of the present invention includes: a carrying unit configured to carry an optical film including a polarizing film and a release film, wherein the polarizing film includes an adhesive layer through which, a release film adheres to and is peeled from the polarizing film; a cutting unit configured to cut the optical film up to a predetermined depth to form a polarizing film sheet piece on the optical film, without cutting the release film; a panel supply unit configured to continuously supply a panel to an attachment position, at which the polarizing film sheet piece is attached to one surface of the panel; an attachment unit configured to peel the polarizing film sheet piece from the release film, and attach the peeled polarizing film sheet piece to the one surface of the panel supplied by the panel supply unit; and a winding unit configured to wind the release film peeled by the attachment unit, wherein the attachment unit includes: an adhering means, which has an adhering property at an external side thereof, and peels the polarizing film sheet piece from the release film by the adhering property, and moves to the attachment position and makes the polarizing film sheet piece face the one surface of the panel in parallel; and an attaching means, which presses the adhering means to attaches the polarizing film sheet piece to the one surface of the panel.

First claim

The invention claimed is:

1. A system for manufacturing a display unit, the system comprising:
a carrying unit configured to carry an optical film including a polarizing film and a release film, wherein the polarizing film includes an adhesive layer through which, a release film adheres to and is peeled from the polarizing film;
a cutting unit configured to cut the optical film up to a predetermined depth to form a polarizing film sheet piece on the optical film, without cutting the release film;
a panel supply unit configured to continuously supply a panel to an attachment position, at which the polarizing film sheet piece is attached to one surface of the panel;
an attachment unit configured to peel the polarizing film sheet piece from the release film, and attach the peeled polarizing film sheet piece to the one surface of the panel supplied by the panel supply unit; and
a winding unit configured to wind the release film peeled by the attachment unit,
wherein the attachment unit includes:
an adhering means, which has an adhering property at an external side thereof, and peels the polarizing film sheet piece from the release film by the adhering property, and moves to the attachment position and makes the polarizing film sheet piece face the one surface of the panel in parallel;
an attaching means, which presses the adhering means to attach the polarizing film sheet piece to the one surface of the panel, and
a moving means, which moves so as to enable the adhering means to pass through an adhering position, at which the adhering means adheres to the carried polarizing film sheet piece, and the attachment position, and
wherein the adhering means is positioned on at least a part of a surface of the moving means.

2. The system of claim 1 , wherein the moving means is formed in a belt type and is rotated to enable the adhering means to circulate while passing through the adhering position and the attachment position.

3. The system of claim 1 , wherein adhering force of the adhering means to the polarizing film sheet piece is larger than the adhering force between the adhesive layer of the polarizing film sheet piece and the release film and is smaller than the adhering force between the adhesive layer of the polarizing film sheet piece and the panel.

4. The system of claim 1 , wherein the attachment means presses a rear portion of the polarizing film sheet piece in a direction adjacent to the panel and attaches the rear portion of the polarizing film sheet piece to a rear portion of the panel, and moves forward to a front portion opposite to the rear portion of the polarizing film sheet piece to attach the polarizing film sheet piece to one surface of the panel.

5. The system of claim 1 , wherein the attachment means includes an attachment roll, and
a diameter of the attachment roll is 20 to 80 mm.

6. The system of claim 1 , further comprising:
an aligning unit, which aligns the panel to have a posture corresponding to a posture of the polarizing film sheet piece transferred to the attachment position.

7. The system of claim 6 , wherein the aligning unit includes:
a photographing means, which photographs the polarizing film sheet piece and the panel transferred to the attachment position to provide an image;
a control means, which calculates an alignment angle of the panel based on the image provided by the photographing means; and
an adsorbing means, which adsorbs the panel and horizontally rotates or shifts the panel in a state corresponding to the alignment angle calculated by the control means.

8. The system of claim 7 , wherein the photographing means simultaneously photographs the polarizing film sheet piece transferred to the attachment position and the panel supplied to the attachment position.

9. A method of manufacturing a display unit, the method comprising:
carrying an optical film wherein the optical film includes a polarizing film and a release film, wherein the polarizing film includes an adhesive layer through which, a release film adheres to and is peeled from the polarizing film, wherein the carrying is conducted by a carrying unit;
cutting the optical film up to a predetermined depth to form a polarizing film sheet piece on the optical film, without cutting the release film, wherein the cutting is conducted by a cutting unit;
continuously supplying a panel to an attachment position, at which the polarizing film sheet piece is attached to one surface of the panel, wherein the supplying is conducted by a panel supply unit;
peeling the polarizing film sheet piece from the release film, and attaching the peeled polarizing film sheet piece to one surface of the panel supplied by the panel supply unit, wherein the peeling and attaching are conducted by an attachment unit; and
winding the release film peeled by the attachment unit, wherein the winding is conducted by a winding unit,
wherein the peeling and attaching includes:
peeling the polarizing film sheet piece from the release film through an adhering means, wherein the adhering means has an adhering property at an external side thereof, moving the adhering means to the attachment position, and making the polarizing film sheet piece face one surface of the panel in parallel;
pressing the adhering means through an attachment means to attach the polarizing film sheet piece to one surface of the panel, and
moving the adhering means through an adhering position, at which the adhering means adheres to the polarizing film sheet piece formed on the carried optical film, and the attachment position, and
wherein the adhering means is positioned on at least a part of a surface of the moving means.

10. The method of claim 9 , wherein in the peeling and attaching, the moving means is formed in a belt type and is rotated, so that the adhering means circulates while passing through the adhering position and the attachment position.

11. The method of claim 9 , wherein adhering force of the adhering means to the polarizing film sheet piece is larger than the adhering force between the adhesive layer of the polarizing film sheet piece and the release film and is smaller than the adhering force between the adhesive layer of the polarizing film sheet piece and the panel.

12. The method of claim 9 , wherein in the peeling and attaching, the attachment means presses a rear portion of the polarizing film sheet piece in a direction adjacent to the panel to attach the rear portion of the polarizing film sheet piece to a rear portion of the panel, and moves forward to a front portion opposite to the rear portion of the polarizing film sheet piece to attach the polarizing film sheet piece to one surface of the panel.

13. The method of claim 9 , wherein the attachment means includes an attachment roll, and
a diameter of the attachment roll is 20 to 80 mm.

14. The method of claim 9 , further comprising:
aligning the panel to have a posture corresponding to a posture of the polarizing film sheet piece transferred to the attachment position, wherein the aligning is conducted by an aligning unit.

15. The method of claim 14 , wherein the aligning includes:
photographing the polarizing film sheet piece and the panel transferred to the attachment position and providing an image;
calculating an alignment angle of the panel based on the image; and
adsorbing the panel and horizontally rotating or shifting the panel to be a state corresponding to the alignment angle.

16. The method of claim 15 , wherein in the photographing, the polarizing film sheet piece transferred to the attachment position and the panel supplied to the attachme

Assignees

• Lg Chemical Ltd

Inventors

• Lee Beom Seok
• Choi Hang Suk
• Jang Eung Jin
• Lee Suk Jae
• Park Kyung Hyeok

Classifications

• B32B37/02

  characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations · CPC title

• G02F1/1335

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title

• B29C65/7861

  In-line machines, i.e. feeding, joining and discharging are in one production line (B29C65/7879, B29C65/7888 take precedence) · CPC title

• B32B38/185 Primary

  combined with the cutting of one or more layers · CPC title

• B29D11/0073 Primary

  Optical laminates · CPC title