KR102284463B1 - System for attaching film and Method for attaching film - Google Patents

Abstract

The present invention relates to a film adhering system and a film adhering method, wherein a first polarizing film is full-cut and rotated at an angle of 90 degrees or less and then attached to one side of a panel, the panel is inverted by 180 degrees, and a second polarizing film is attached to the two sides of the panel in a half-cut state.

Description

Film attachment system and film attachment method {System for attaching film and Method for attaching film}

The present invention relates to a film deposition system and a film deposition method.

The present invention relates to a system and an attachment method for attaching a polarizing film to both sides of a panel during the manufacturing process of a display panel such as an LCD module, wherein the upper and lower surfaces of the panel are optically anisotropic during the manufacturing process of a display panel such as an LCD module (optically anisotropic), a polarizing film is attached to the upper and lower surfaces of the panel.

A conventional polarizing film attachment method includes a sheet-to-panel method and a roll-to-panel method.

The sheet-to-panel attachment method refers to a method of supplying and attaching a polarizing film sheet cut according to the size of the panel, and the roll-to-panel attachment method refers to a method of attaching a film supplied as a roll of fabric to the panel.

According to Korean Patent No. 10-0975501, a roll-to-panel method and a panel turning method are adopted as a method for attaching a polarizing film to a panel.

In detail, according to the prior art, two film rolls having the same optical anisotropy are used, and a polarizing film is attached to one side of the panel so that the optical anisotropy is opposite to each other, and then the panel is rotated 90 degrees A polarizing film is attached to the other side. In addition, in order to attach the polarizing film to the panel, a method of allowing the panel and the polarizing film to pass between a pair of rollers and attaching the polarizing film to the panel by the pressing force of the roller is applied.

According to the film attachment method according to the prior art, there are the following disadvantages.

First, there is a high possibility that the film is not accurately aligned with the panel because the leading end of the film is not accurately aligned with the panel.

Second, in a structure in which the film is attached to the panel while removing the release paper, and the film is attached to the panel by pressing a roller, the film adhesion precision is lowered, and there is a high possibility that air bubbles are generated between the film and the panel during the attachment process. there is.

Third, since there is no process of attaching a film to one side of the panel and then inverting the upper and lower surfaces of the panel, devices including a film transport device and a cutting device necessary for attaching the film to the other side of the panel are present at the top of the panel Therefore, it is difficult to construct a film attachment system.

The present invention is proposed to improve the above problems.

A film attachment system according to an embodiment of the present invention for achieving the above object is a film attachment system for attaching a polarizing film having optical anisotropy on both sides of a panel, the first polarized light on the first surface of the panel a first polarizing film attachment system for attaching the film; and a second polarizing film attaching system for attaching a second polarizing film to the second side of the panel, wherein the first polarizing film attaching system comprises: a panel transfer unit for transferring the panel to a first polarizing film attaching area; a film supply unit supplying a first polarizing film unit including the first polarizing film, a protective film attached to one surface of the first polarizing film, and a release paper attached to the other surface of the first polarizing film; a film transfer unit for transferring the first polarizing film; a cutter for full cutting the first polarizing film unit transferred by the film transfer unit; a first adsorption drum for guiding the first polarizing film unit to the first polarizing film attachment area by rotating the first polarizing film unit in the form of a sheet fully cut by the cutter on an outer circumferential surface of the first polarizing film unit; and a release paper removal unit for peeling the release paper of the first polarizing film unit adsorbed to the first adsorption drum, wherein the first polarizing film unit, which has been fully cut by the cutter, reaches the first film attachment region The first polarizing film in contact with the surface of the first adsorbing drum is rotated by a predetermined angle about the vertical axis before, and in the first polarizing film attaching area, the first adsorbing drum rotates and the panel moves It is characterized in that it is attached to the first surface of the panel.

In addition, the film attaching method of the film attaching system according to an embodiment of the present invention for achieving the above object is a film attaching method of a film attaching system for attaching a polarizing film having optical anisotropy to both sides of a panel, supplying and transporting a first polarizing film unit including a first polarizing film, a protective film attached to one surface of the first polarizing film, and a release paper attached to the other surface of the first polarizing film; transferring the panel to the first polarizing film attachment area; Fully cutting from the protective film of the first polarizing film unit to the release paper by a cutter; rotating the full-cut first polarizing film unit by a predetermined angle about a vertical axis; peeling the release paper of the pivoted first polarizing film unit; and guide the first polarizing film to which the release paper is peeled and exposed to the first polarizing film attachment area, and attaching it to the first surface of the panel.

In another aspect, a method for attaching a film according to an embodiment of the present invention includes a panel transfer step of transferring a panel to a first polarizing film attaching area; a first polarizing film attaching step of attaching a first polarizing film to the first surface of the panel in the first polarizing film attaching region; a panel inversion step in which the panel to which the first polarizing film is attached is vertically inverted by 180 degrees; a panel transfer step in which the vertically inverted panel is transferred to a second polarizing film attachment area; and attaching a second polarizing film to a second surface of the panel in the second polarizing film attachment region, wherein the second surface is opposite to the first surface.

A film attaching method according to an embodiment of the present invention in another aspect is a film attaching method of a film attaching system for attaching a polarizing film having optical anisotropy on both sides of a panel, a first polarizing film attaching step, and a panel reversing step and attaching a second polarizing film, wherein the attaching the first polarizing film comprises: a first polarizing film having a width corresponding to a short side of the panel, and a protective film attached to one surface of the first polarizing film; supplying and transporting a first polarizing film unit wound in a roll shape including a release paper attached to the other surface of the first polarizing film; transferring the panel to a first polarizing film attachment area, with a long side facing the attachment area; full cutting from the protective film of the first polarizing film unit to the release paper to a length corresponding to the long side of the panel by a cutter; rotating the full-cut first polarizing film unit by a predetermined angle about a vertical axis; transferring the first polarizing film unit in the form of a sheet fully cut by the cutter to an outer peripheral surface of a first suction drum; peeling the transferred release paper of the first polarizing film unit; and attaching the first polarizing film to which the release paper is peeled and exposed by rotating the first suction drum, and the panel inversion step includes attaching the first polarizing film unit to the first surface of the panel. and inverting and transferring the panel to a second polarizing film attachment region, inverting the long side to a state toward the second polarizing film attachment region, wherein the second polarizing film attaching step corresponds to the long side of the panel A second polarizing film unit wound in a roll shape including a second polarizing film having a width of feeding and conveying; a half-cutting step of cutting the protective film and the second polarizing film of the second polarizing film unit to a length corresponding to the short side of the panel by a cutter and cutting the release paper without cutting or only a part; separating the release paper while transferring the half-cut protective film and the second polarizing film of the second polarizing film unit to a second adsorption drum; and attaching the second polarizing film to the second surface of the panel while the panel passes through the second polarizing film attachment region.

According to the film attachment system and the film attachment method according to an embodiment of the present invention having the configuration as described above, there are the following effects.

First, the polarizing film with the release paper removed is adsorbed to the adsorption drum and the film is attached as the panel passes between the adsorption drum and the attachment roller. This has the advantage of significantly reducing the likelihood of doing so.

Second, since the film is attached to one side of the panel and then the panel is inverted so that the film is attached to the other side of the panel, devices for attaching the film to one side and the other side of the panel can be provided on the lower side of the panel Therefore, there is an advantage of easy construction of the film attachment system.

1 is a cross-sectional view of a polarizing film unit used in a film attaching system according to an embodiment of the present invention;
2 is a cross-sectional view of a panel to which a polarizing film is attached by a film attachment system according to an embodiment of the present invention.
3 is a flowchart schematically illustrating a film attaching method of a film attaching system according to an embodiment of the present invention.
4 is a flowchart showing an upper polarization film attachment process performed in a film attachment system according to an embodiment of the present invention.
5 is a view schematically showing an upper polarizing film attachment process diagram.
6 and 7 are process diagrams showing a film turning method according to another embodiment of the present invention.
8 is a flowchart showing a process of attaching a lower polarization film performed in a film attaching system according to an embodiment of the present invention.
9 is a view schematically showing a process diagram of attaching a lower polarization film.

Hereinafter, a film attachment system and a film attachment method according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a cross-sectional view of a polarizing film unit used in a film attaching system according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a panel to which a polarizing film is attached by a film attaching system according to an embodiment of the present invention.

1 and 2 , a polarizing film unit according to an embodiment of the present invention is an optical film having optical anisotropy, and an upper polarizing film unit 20 and a lower and a lower polarizing film unit 40 . The upper polarization film unit 20 and the lower polarization film unit 40 may be defined as a first polarization film unit and a second polarization film unit, respectively.

In detail, the upper polarization film unit 20 and the lower polarization film unit 40 are provided in the form of a roll, and both film units have an absorption axis formed in the longitudinal direction of the film. That is, the upper polarization film unit 20 and the lower polarization film unit 40 have the same optical anisotropy. In addition, the upper polarization film unit 20 is attached to the upper surface of the panel 10 , and the lower polarization film unit 20 is attached to the lower surface of the panel 10 .

And, for the polarization effect, the absorption axis of the upper polarization film unit 20 and the absorption axis of the lower polarization film unit 20 are attached to the upper surface and the lower surface of the panel 10, respectively, in an intersecting state.

To this end, the panel 10 has a rectangular shape, the width of the upper polarization film unit 20 is formed to be a length corresponding to the short side of the panel 10 , and the length is the long side of the panel 10 . Cut to have a length corresponding to . Conversely, the width of the lower polarization film unit 40 is formed to have a length corresponding to the long side of the panel, and the length is cut to have a length corresponding to the short side of the panel 10 . Then, one of the upper polarization film unit 20 and the lower polarization film unit 20 is rotated about 90 degrees and then attached to the panel 10 . Hereinafter, attaching the upper polarizing film unit 20 to the panel 10 by turning it will be described as an example. However, it should be noted that attaching the lower polarization film unit 20 to the panel 10 by turning it is also included in the spirit of the present invention.

The polarizing film units 20 and 40 include polarizing films 11 and 12 , a protective film 13 adhered to the upper surfaces of the polarizing films 11 and 12 , and the polarizing films 11 and 12 . ) may include a release paper (release film) 14 that is adhered to the lower surface. The release paper 14 is removed just before the polarizing films 11 and 12 are attached to the panel 10 so that the surfaces of the polarizing films 11 and 12 that were in contact with the release paper 14 are exposed to the panel ( It is attached to the upper or lower surface of 10). In addition, the protective film 13 may be removed at a specific step after the process of attaching the polarizing films 11 and 12 to the panel 10 . The polarizing films 11 and 12 include an upper polarizing film 11 and a lower polarizing film 12 . The upper polarizing film 11 and the lower polarizing film 12 may be defined as a first polarizing film and a second polarizing film.

As shown in FIG. 2 , the upper polarization film 11 is attached to the upper surface of the panel 10 , and the lower polarization film 12 is attached to the lower surface of the panel 10 . In addition, the protective film 13 adhered to the polarizing films 11 and 12 is in a removed state.

In addition, the panel may include a display panel (a glass panel in which a liquid crystal cell is encapsulated) provided in the LCD display device.

Hereinafter, a process in which the polarizing films 11 and 12 are respectively attached to the panel 10 will be described in detail with reference to the drawings.

3 is a flowchart schematically illustrating a method for attaching a film of a film attaching system according to an embodiment of the present invention.

Referring to FIG. 3 , for attaching the polarizing film, the panel 10 is transferred to the film attaching area ( S10 ). Before that, the polarizing film units 20 and 40 are transferred to the film attachment area with the release paper removed. In this state, the upper polarizing film 11 is attached to the lower surface of the panel 10 (S20), and the panel 10 is rotated 180 degrees about the horizontal axis so that the upper and lower surfaces are inverted (S30). Then, in a state in which the upper and lower surfaces of the panel 10 are inverted, the lower polarization film 12 is attached to the lower surface of the panel 10 ( S40 ), and the film attaching process is completed. Hereinafter, the surface of the panel 10 to which the upper polarization film 11 is attached is defined as a first surface, and the surface of the panel 10 to which the lower polarization film 12 is attached is defined as a second surface. do.

4 is a flowchart illustrating an upper polarization film attachment process performed in a film attachment system according to an embodiment of the present invention, and FIG. 5 is a diagram schematically illustrating an upper polarization film attachment process diagram.

4, in order to attach the upper polarizing film 11 to the panel 10, the upper polarizing film unit 20 is supplied in the form of a roll sheet (S21), and the upper polarizing film unit is supplied ( 20) is fully cut (S22) to fit the size of the panel (10). Here, the full cutting refers to completely cutting the protective film 13 , the upper polarizing film 11 , and the release paper 14 of the upper polarizing film unit 20 . Accordingly, the upper polarizing film unit 20 supplied in the form of a roll sheet is cut in the form of a film sheet to fit the size of the panel 10 .

On the other hand, the upper polarizing film unit 20 in the form of a cut sheet is rotated 90 degrees by a turning device (to be described later) (S23). Then, at the same time as the release paper 14 of the rotated upper polarizing film unit 20 is peeled off, the protective film 13 and the upper polarizing film 11 are adsorbed to an adsorption drum (to be described later), and the upper polarizing film ( 11) The part is attached to the first surface of the panel 10 (S25).

The upper polarization film attachment system of the present invention will be described in more detail with reference to FIG. 5 . The upper polarization film unit 20 provided in a state wound around the film roll 21 is unwound and transferred to the film cutting area by the film transfer unit 22 . Accordingly, the portion of the upper polarization film unit 20 wound around the film roll 21 may be defined as a film supply unit.

The film transfer unit 22 is a part including various components including a plurality of rollers and a tension adjusting device, and allows the film to be transferred to the film cutting area while maintaining the tension. The configuration of the film transfer unit 22 may be applied to the configuration presented in the above-mentioned prior art, and thus a detailed description thereof will be omitted.

In detail, the width of the upper polarization film unit 20 may be formed to correspond to the length of the short side of the panel 10 . In addition, the upper polarization film unit 20 transferred by the film transfer unit 22 passes through the defect inspection device 24 to determine whether it is defective. Then, the upper polarization film unit 20 passing through the defect inspection device 24 is guided to the cutting bed 23 to be fully cut by the cutter 25 . Here, the cutter 25 cuts the upper polarization film unit 20 at intervals corresponding to the long side length of the panel 10 .

In addition, when a defective portion is found by the defective inspection device 24 , points spaced apart from the defective portion by a predetermined distance in front and rear are cut so that the defective sheet portion can be removed. The cutting interval of the upper polarizing film unit 20 cut by the cutter 25 to remove the defective portion may be set smaller than the long side width of the panel 10 according to the size of the defective portion. and may be set to be larger.

On the other hand, the upper polarization film unit 20 cut by the cutter 25 is rotated 90 degrees about the vertical axis by the film turning device 26 and guided to the adsorption bed 27 . In other words, in a state in which the short side of the upper polarizing film unit 20 faces the conveying direction, the long side of the upper polarizing film unit 20 is turned by the film turning device 26 so as to face the conveying direction.

In addition, the upper polarization film unit 20 rotated 90 degrees while being adsorbed by the film turning device 26 is transferred to the adsorption bed 27 by the film turning device 26, and the adsorption bed It is separated from the film turning device 26 by releasing the suction force of the film turning device 26 in the state placed at (27). Then, the long side of the upper polarization film unit 20 is transferred toward the adsorbing drum 28 by the adsorbing bed 27 in a state in which it faces the transfer direction. The adsorption bed 27 may include a conveyor belt.

The suction drum 28 has a vacuum suction hole (not shown) formed on its outer circumferential surface for vacuum suction, or an adhesive sheet having a certain level of adhesive force is fixed to the outer circumferential surface of the drum 28 . The suction drum 28 is in contact with the front end of the upper polarization film unit 20 . Thereafter, the suction drum 28 is rotated counterclockwise in the drawing, and the upper polarizing film unit 20 is transferred to the outer peripheral surface of the suction drum 28 by adsorption or adhesion.

Hereinafter, it will be described that the suction drum 28 is installed in a vacuum suction method, but the operation is the same even in the case of the pressure sensitive adhesive sheet method.

When the suction drum 28 is installed in the adhesive sheet method, it is necessary to adjust the adhesive force of the adhesive sheet. That is, when the upper polarizing film unit 20 is attached to the panel 10 , the adhesive strength of the adhesive sheet may have an adhesive strength such that the protective film 13 is separated from the adhesive sheet.

The adsorption drum 28 rotates the upper polarization film unit 20 in a state in which it is adsorbed, so that it is positioned on the bottom surface of the panel 10 . In addition, the suction drum 28 releases the suction force while rotating so that the upper polarizing film 11 is attached to the panel 10 .

In detail, the upper surface portion of the upper polarizing film unit 20 transferred by the adsorption bed 27 , that is, the protective film 13 portion is in close contact with the outer peripheral surface of the adsorption drum 28 . And, the adsorption drum 28 adsorbs the portion of the protective film 13 that is in close contact with each other. Accordingly, from the front end to the rear end of the upper polarizing film unit 20 is gradually adsorbed to the surface of the adsorption drum (28). In addition, the upper polarizing film unit 20 rotates while being adsorbed to the suction drum 28 .

In addition, the release paper 14 of the upper polarizing film unit 20 must be removed before being attached to the panel 10 . A release paper removing part 29 is disposed on one side of the front side of the suction drum 28 so that the release paper 14 is separated when the upper polarizing film unit 20 rotates with the suction drum 28 as one body. do.

In detail, the release paper removing unit 29 includes an adhesive tape 292 to which the release paper 14 is attached, a release film recovering roller, and the adhesive tape 292 for the adsorption. and a release roller 293 for selectively contacting the release paper 14 of the upper polarizing film unit 20 adsorbed on the drum 28 . The release paper collecting roller includes an unwinding roller 291 having the adhesive tape 292 wound around its outer circumferential surface and rotating in a direction in which the adhesive tape 292 is unwound, and the unwinding roller 291 is unwound. It may include a winding roller 294 for winding the adhesive tape 292 . The release roller 293 is disposed between the unwinding roller 291 and the take-up roller 294 , and the rear surface of the adhesive tape 292 is in close contact with the outer circumferential surface. In addition, the release roller 293 is in close contact with the suction drum 28 so that the adhesive tape 292 is in contact with the upper polarizing film unit 20 . Here, the adhesive force of the adhesive tape 292 is greater than that of the release paper 14 to maintain the attached state to the upper polarizing film 21 .

In the process of rotating the upper polarizing film unit 20 as one body with the suction drum 28 while being adsorbed on the suction drum 28, the release paper 14 part is removed by the release paper removing unit 29 It is adhered to the adhesive tape 292 and collected by the take-up roller 294 . In addition, the protective film 13 and the upper polarizing film 11 are rotated and moved to the film attachment region to which the panel 10 is transported.

Meanwhile, a panel transfer unit 30 is provided on the upper side of the suction drum 28 , and the panel transfer unit 30 transfers the panel 10 , which is a polarizing film attachment target, to an upper polarizing film attachment region. Then, the panel 10 is transferred to the panel transfer unit 30 by the panel supply unit 31 .

In detail, the panel transfer unit 30 includes an inlet transfer unit 32 that transfers the panel 10 toward the entrance of the upper polarization film attachment area, and the panel 10 leaving the upper polarization film attachment area in the next process. That is, it may include an outlet transfer unit 33 for transferring the lower polarization film to the lower polarization film attaching process, and a panel supply unit 31 for adsorbing the panel 10 and placing it on the inlet transfer unit 32 . In addition, the inlet transfer unit 32 and the outlet transfer unit 33 may include a conveyor belt or a transfer device composed of a plurality of rollers. In addition, an attachment roller 36 is provided in the film attachment region, and the attachment roller 36 is disposed at a position spaced apart from the upper surface of the suction drum 28 by an interval corresponding to the thickness of the panel 10 . can The attachment roller 36 may be installed to be movable up and down. In addition, the panel 10 guided by the inlet transfer unit 32 passes through the space between the attachment roller 36 and the suction drum 28, and the polarizing film ( 11) is attached. In addition, the panel 10 is placed on the panel conveying unit 30 and moved with the long side facing the conveying direction.

In more detail, the panel 10 includes a first surface 101 to which the upper polarization film 11 is attached, and a second surface 102 to which the lower polarization film 12 is attached, and the film is It is drawn into the film attaching area in a state where the side to be attached faces the adsorption drum 28 . That is, in the upper polarizing film attachment region, the first surface 101 moves toward the suction drum 28 . In addition, the surface of the upper polarizing film 11 from which the release paper 14 is separated and exposed to the outside faces the first surface 101 of the panel 10 . Then, while the suction drum 28 rotates at the same linear speed as the moving speed of the panel 10 , the upper polarizing film 11 is moved to the panel 10 by the pressing force by the attachment roller 36 . It is attached to the first surface 101 .

Here, as the upper polarization film 11 is attached to the panel 10 , the adsorption state of the suction drum 28 is gradually released, and the portion of the upper polarization film 11 attached to the panel 10 . to be separated from the adsorption drum (28). As described above, in a state in which the upper polarizing film 11 is adsorbed to the adsorption drum 28 , the upper polarizing film 11 rotates along the surface of the panel 10 as the adsorption drum 28 rotates along the surface of the panel 10 . By gradually attaching to the surface of the panel 10, the occurrence of air bubbles between the film and the panel can be minimized.

As in the prior art, when viewed from the side, in the case of a structure in which the film is provided at a predetermined angle upward or downward from the panel and a separate pressure roller rotates to attach the film to the panel, the film and There is a disadvantage in that there is a high possibility that air bubbles are generated between the panels.

In addition, the film becomes thin as the film is irregularly stretched by the pressing force of the pressure roller, and at the same time, the film overlaps and is attached to the panel to decrease the alignment, or the rear end of the film as the film is stretched Since it is longer than the rear end of the additional panel, a phenomenon in which the film protrudes from the panel may occur.

However, as in the present invention, as the film is gradually contacted with the panel while being adsorbed to the drum, there is an advantage in that the above-mentioned problems do not occur in the prior art.

The panel 10 to which the upper polarizing film 11 is attached while passing through the attachment roller 36 and the suction drum 28 is moved to the next process by the outlet transfer unit 33 . Here, as the long side of the panel 10 moves in the transport direction, the upper polarizing film 11 and the panel 10 are precisely aligned.

In addition, the panel 10 conveyed along the exit side conveying part 33 is inverted 180 degrees by a reversing device 50 . That is, the first surface 101 to which the upper polarizing film 11 is attached is rotated 180 degrees around the horizontal axis so that the second surface 102, which is the opposite surface, faces downward. Then, the panel 10 is transferred to the lower polarizing film attachment area in a vertically inverted state. As an example of the reversing device 50, although not specifically shown, a robot arm structure that picks up and rotates the upper and lower surfaces of the panel 10 or a robot arm structure that picks up and rotates the front end side and the rear end side of the panel 10 A robot arm structure would be possible.

Meanwhile, a defect is detected by the defect inspection device 24 , and the upper polarization film unit 20 including the defective part is cut to a predetermined size by the cutter 25 . And, the defective film portion is adsorbed to the suction drum 28 and rotates, and from the moment the release paper 14 portion is attached to the adhesive tape 292, the suction power of the suction drum 28 is gradually removed. The adsorption state is canceled. In other words, as the adsorption state of the portion of the suction drum 28 corresponding to the area in close contact with the release roller 293 is released, the defective film portion does not move to the film attachment area and moves to the take-up roller 294 . to be recovered According to this configuration, since the release paper removing unit 29 simultaneously performs the function of removing the defective film, as disclosed in the prior art (FIG. 5 of Patent No. 10-0975501), an exclusion device for removing the defective film portion is separately There are advantages that do not need to be provided.

On the other hand, when the suction drum 28 is an adhesive sheet type, it is possible to remove the defective film by adding a configuration in which the film turning device 26 moves horizontally.

6 and 7 are process diagrams showing a film turning method according to another embodiment of the present invention.

Hereinafter, the same reference numerals will be used for the same components as those described with reference to FIG. 5 , and descriptions of the same components will be omitted.

Referring to FIGS. 6 and 7 , the upper polarizing film unit 20 that is fully cut to a length corresponding to the length of the long side of the panel 10 by the cutter 25 is attached to the suction drum 28 . adsorbed At this time, the adsorption drum 28 rotates while moving in a direction perpendicular to the direction in which the upper polarization film unit 20 is unwound so that the cut upper polarization film unit 20 is adsorbed to the adsorption drum 28 . . Hereinafter, a direction orthogonal to a direction in which the upper polarization film unit 20 is unwound is defined as a first direction, and a direction in which the upper polarization film unit 20 is unwound is defined as a second direction. Accordingly, the adsorption drum 28 moves in the first direction while rotating, so that the cut upper polarization film unit 20 is adsorbed to the outer circumferential surface.

Under these conditions, the length of the suction drum 28 described in FIGS. 5 to 7 is equal to or larger than the length of the long side of the cut upper polarizing film unit 20, and the length of the suction drum 28 is The circumference should be at least equal to or larger than the length of the short side of the cut upper polarizing film unit 20 .

On the other hand, in a state in which the cut upper polarization film unit 20 is adsorbed to the absorption drum 28 , the absorption drum 28 rotates 90 degrees about the vertical axis Y to the upper polarization film unit (20) is characterized in that it is pivoted. Then, in a state in which the suction drum 28 is rotated 90 degrees about the vertical axis Y, it moves toward the release paper removal unit 29 to perform a release paper separation process. Since the subsequent process is the same as that described in FIG. 5 , it is omitted.

As described above, the present embodiment is characterized in that the film is guided to the film attaching area in a state in which the film is rotated 90 degrees by the direct rotation of the suction drum 28 without using a separate film turning device.

8 is a flowchart illustrating a process of attaching a lower polarization film performed in a film attaching system according to an embodiment of the present invention, and FIG. 9 is a view schematically illustrating a process diagram of attaching a lower polarization film.

Referring to FIG. 8 , in order to attach the lower polarization film 12 to the second surface 102 of the panel 10 , the lower polarization film unit 40 in the form of a roll sheet is first supplied ( S41 ). In this case, the width of the lower polarization film unit 40 may be formed to have a size corresponding to the length of the long side of the panel 10 .

In detail, the supplied lower polarization film unit 40 is half-cut at intervals corresponding to the length of the short side of the panel 10 ( S42 ). Here, the half-cutting means cutting only the protective film 13 and the lower polarizing film 12 except for the release paper 14 by the cutter. At this time, a part of the release paper 14 may be cut, but is not completely cut.

In addition, a portion of the half-cut lower polarization film unit 40 , that is, the protective film 13 and the lower polarization film 12 portion is adsorbed to an adsorption drum (to be described later), and the release paper 14 portion is the lower polarization film 12 . It is peeled from the film 12 and is recovered by being wound around a release paper collection roller (to be described later) (S43). Finally, the side of the lower polarization film 12 from which the release paper 14 is separated and exposed is attached to the second surface 102 of the panel 10 ( S44 ), thereby ending the process of attaching the lower polarization film.

9, the lower polarization film attachment system according to an embodiment of the present invention, the film roll 210 on which the lower polarization film unit 40 is wound, and the lower polarization film unit 40 are cut A film transfer unit 220 for transferring to the area, a defect inspection device 240 for inspecting defects of the lower polarization film unit 40, and a cutter 250 for half-cutting the lower polarization film unit 40, A suction drum 280 for adsorbing the half-cut lower polarization film unit 40 , a release paper recovery roller 394 for collecting the uncut release paper 14 , and selectively adhere to the suction drum 280 . and a release roller 393 for selectively adsorbing the half-cut lower polarization film unit 40 to the adsorption drum 280 .

In addition, the lower polarization film attachment system includes a panel transfer unit 30 for guiding the panel 10 whose upper and lower surfaces are inverted in a state where the upper polarization film 11 is attached to the lower polarization film attachment region, and the panel 10 ) and a panel supply unit 310 for transferring to the panel transfer unit (30).

The panel transport system of the lower polarization film attaching system is almost similar to the upper polarization film attaching system. That is, the panel transfer unit 30 of the lower polarization film attachment system presses the panel 10 from the upper side of the suction drum 280 so that the lower polarization film 12 is moved to the second surface of the panel 10 ( and an attachment roller 360 adapted to be attached to 102 .

In detail, the film roll 210, the film transfer unit 220, the defect inspection device 240, the cutter 250, the suction drum 280, the release roller 393, the release paper collection roller 394, the panel transfer unit 30 ), the panel supply unit 310 and the attaching roller 360 have the same functions as those constituting the upper polarizing film attaching system, and thus a redundant description thereof will be omitted. In addition, the release roller 393 and the release paper collection roller 394 may be defined as a release paper removal unit.

In addition, the panel transfer unit 30 includes an inlet transfer unit 34 that transfers the panel 10, in which the upper and lower surfaces are inverted in a state where the upper polarization film 11 is attached, toward the entrance of the lower polarization film attachment region; It further includes an exit-side transfer unit 35 for transferring the panel 10 out of the lower polarizing film attachment area. In addition, the inlet transfer unit 34 and the outlet transfer unit 35 may also include a conveyor belt or a transfer device including a plurality of rollers.

In addition, the inlet transfer part 34 of the lower polarization film attachment system may be configured in a form in which the outlet transfer part 33 of the upper polarization film attaching system is extended. That is, in a structure in which the vertically inverted panel 10 is placed on the inlet transfer unit 34 and transferred to the film attachment region, the panel supply unit 310 may not be separately provided.

In more detail, in the panel 10, the first surface 101 to which the upper polarizing film 11 is attached faces the upper side by a vertical inversion process, and the second surface 102 faces the lower side, that is, the suction drum. It is transferred toward the entrance of the lower polarization panel attachment area in a state toward the (280) side.

In addition, the width of the lower polarization film unit 40 is formed to have a size corresponding to the length of the long side of the panel 10 , and the cutter 250 cuts the lower polarization film unit 40 to the panel 10 . Half-cut at intervals corresponding to the length of the short side of Half cut and full cut can be set by adjusting the cutting depth of the cutter. That is, half-cutting and full-cutting are determined according to the descent depth of the cutter. The half-cutting may be performed at the same depth over the entire width of the lower polarizing film unit 40 , or may have different cutting depths at the central portion and the edge portion in the width direction.

Meanwhile, the lower polarization film unit 20 , which is half-cut at intervals corresponding to the length of the short side of the panel 10 by the cutter 250 , moves to the suction drum 280 . At this time, the cut lower polarization film unit 20 is not transferred by a separate transfer device, but is transferred by winding the uncut release paper 14 around the release paper collecting roller 394 .

In detail, when the release roller 393 is in close contact with the adsorption drum 280, the protective film 13 side of the lower polarization film unit 20 is adsorbed to the adsorption drum 20, and the release paper ( 14) moves toward the release paper collecting roller 394 . That is, the protective film 13 and the lower polarization film 12 are transferred to the suction drum 280 and rotated, and only the release paper 14 is peeled from the lower polarization film 12 and the release paper collection roller 394 . ) wrapped around In addition, the surface of the lower polarization film 12 exposed while the release paper 14 is peeled is attached to the second surface 102 of the panel 10 . In other words, the lower polarization film 12 and the panel 10 are attached to each other while passing between the attachment roller 360 and the suction drum 280 . Then, the panel 10 to which the lower polarizing film 12 is attached is transferred to the next location while being placed on the outlet transfer unit 35 . Here, the panel 10, while passing through the upper polarization film attaching system and the lower polarizing film attaching system, only the upper and lower surfaces are reversed, and the long and short sides are not rotated. That is, the long side portion is transferred while maintaining the state in the transfer direction, and it can be said that the transfer method of the panel 10 is different from the method of the prior art mentioned above.

Meanwhile, when a defect is found by the defect inspection device 240 , the defective part is cut in half to a predetermined size by the cutter 250 . Then, the half-cut defective portion is transferred to the release roller 393 . At this time, the release roller 393 operates differently from when the lower polarization film unit 40 of good quality is transferred. That is, when the lower polarization film unit 40 of good quality is transferred, the release roller 393 moves toward the suction drum 280 and the half-cut lower polarization film unit 40 is placed on the suction drum 280 . However, when the defective part is transferred, the release roller 393 maintains a state spaced apart from the suction drum 280 . Then, the defective part is not absorbed by the suction drum 280 but is wound around the release paper collection roller 394 along the release paper 14 . Therefore, there is no need to provide a separate device for recovering the defective film.

In addition, in the above embodiment, the width of the upper polarization film unit 20 is provided in a size corresponding to the length of the short side of the panel 10 , and the width of the lower polarization film unit 40 is the scene of the panel 10 . It has been described on the premise that a size corresponding to the minor length is provided, but the reverse case is also possible. That is, the width of the upper polarization film unit 20 is provided to correspond to the length of the long side of the panel 10 , and the width of the lower polarization film unit 40 is the length of the short side of the panel 10 . It is also possible to be provided in a size corresponding to the .

In addition, although it has been described that the upper polarizing film is rotated by 90 degrees as an example, it is not limited to 90 degrees, and it is also possible to provide to be rotated by a predetermined angle according to the arrangement structure of the attachment system.

Claims (34)

In the film attachment system for attaching a polarizing film having optical anisotropy on both sides of a panel,
a first polarizing film attachment system for attaching a first polarizing film to a first side of the panel facing down;
a reversing device for inverting the panel to which the first polarizing film is attached by 180 degrees about a horizontal axis so that a first side of the panel faces up and a second side faces down; and
a second polarizing film attachment system for attaching a second polarizing film to a second surface of the panel to which the first polarizing film is attached;
The first polarizing film attachment system,
a panel transfer unit for transferring the panel to a first polarizing film attachment area;
a film supply unit supplying a first polarizing film unit including the first polarizing film, a protective film attached to one surface of the first polarizing film, and a release paper attached to the other surface of the first polarizing film;
a film transfer unit for transferring the first polarizing film;
a cutter for full cutting the first polarizing film unit transferred by the film transfer unit;
In a state in which the short side of the full-cut first polarizing film unit faces the transport direction, the short side of the full-cut first polarizing film unit faces in a vertical direction perpendicular to the transport direction, and the full-cut first polarizing film unit a film turning device for turning the full-cut first polarizing film unit on a horizontal plane about a vertical axis so that a long side part faces a transport direction;
Rotating counterclockwise about the horizontal axis, the first polarizing film unit is adsorbed on the outer peripheral surface from the front end to the rear end of the pivoted first polarizing film unit in the first polarizing film attachment region of the panel a first suction drum guiding to the bottom; and
and a release paper removal unit for peeling the release paper of the first polarizing film unit adsorbed to the first adsorption drum,
An absorption axis is formed in each of the first polarizing film and the second polarizing film in a transport direction,
the film turning device rotates the first polarizing film 90 degrees on a horizontal plane so that an absorption axis of the first polarizing film is perpendicular to an absorption axis of the second polarizing film;
In the first polarizing film attaching region, the first polarizing film in contact with the surface of the first adsorbing drum is attached to the first surface of the panel while the first adsorbing drum rotates and the panel moves film attachment system. delete delete The method of claim 1,
The release paper removal unit,
adhesive tape,
a release roller for releasing the adhesive tape;
a take-up roller for winding the adhesive tape;
and a release roller for pressing the adhesive tape so that the adhesive surface of the adhesive tape is in close contact with the suction drum. The method of claim 1,
an attachment roller provided at a point spaced apart from the first suction drum in the first film attachment region;
When the panel passes between the attaching roller and the first adsorption drum, the first polarizing film adsorbed to the first adsorbing drum is attached to the first surface of the panel by the pressing force of the attaching roller. film attachment system. The method of claim 1,
The second polarizing film attachment system,
a panel transfer unit for transferring the panel to which the first polarizing film is attached to a second polarizing film attaching area;
a film supply unit supplying a second polarizing film unit including the second polarizing film, a protective film attached to one surface of the second polarizing film, and a release paper attached to the other surface of the second polarizing film;
a film transfer unit for transferring the second polarizing film unit;
a cutter for half cutting that cuts the protective film and the second polarizing film of the second polarizing film unit transferred by the film transfer unit, and does not cut the release paper or cuts only a portion of the release paper;
a second adsorption drum rotating while adsorbing the protective film and the polarizing film of the second polarizing film unit in the form of a sheet half-cut by the cutter; and
and a release paper removal unit for removing the release paper of the second polarizing film unit from the second polarizing film. 7. The method of claim 6,
The release paper removal unit of the second polarizing film attachment system,
a release paper collecting roller for winding and collecting the release paper of the second polarizing film unit;
and a release roller for selectively adhering the second polarizing film unit to the second adsorption drum. delete delete delete delete delete delete delete delete delete delete In the film attachment method of a film attachment system for attaching a polarizing film having optical anisotropy on both sides of a panel,
attaching a first polarizing film to a first side of the panel facing down in a first polarizing film attaching system;
inverting the panel to which the first polarizing film is attached by 180 degrees about a horizontal axis in a reversing device so that the first side of the panel faces upward and the second side faces downward; and
attaching a second polarizing film to a second surface of a panel to which the first polarizing film is attached in a second polarizing film attaching system;
The step of attaching the first polarizing film,
supplying and transporting a first polarizing film unit including a first polarizing film, a protective film attached to one surface of the first polarizing film, and a release paper attached to the other surface of the first polarizing film;
transferring the panel to the first polarizing film attachment area;
Fully cutting from the protective film of the first polarizing film unit to the release paper by a cutter;
In a state in which the short side of the full-cut first polarizing film unit faces the transport direction, the short side of the full-cut first polarizing film unit faces in a vertical direction perpendicular to the transport direction, and the full-cut first polarizing film unit pivoting the full-cut first polarizing film unit on a horizontal plane about a vertical axis so that the long side faces the transport direction;
Rotating counterclockwise about the horizontal axis, the first polarizing film unit is adsorbed on the outer peripheral surface from the front end to the rear end of the pivoted first polarizing film unit in the first polarizing film attachment region of the panel guiding to the bottom;
peeling off the adsorbed release paper of the first polarizing film unit;
and moving the first polarizing film exposed by peeling the release paper to the first polarizing film attachment area and attaching it to the first surface of the panel,
An absorption axis is formed in each of the first polarizing film and the second polarizing film in a transport direction,
In the turning step, the first polarizing film is rotated 90 degrees on a horizontal plane so that an absorption axis of the first polarizing film is orthogonal to an absorption axis of the second polarizing film. delete delete delete delete delete 19. The method of claim 18,
supplying the panel inverted by 180 degrees to a second polarizing film attachment area;
supplying and transferring a second polarizing film unit including a second polarizing film, a protective film attached to one surface of the second polarizing film, and a release paper attached to the other surface of the second polarizing film;
half-cutting the protective film of the second polarizing film unit and the second polarizing film by a cutter;
separating the release paper while the half-cut second polarizing film unit is adsorbed to a second adsorption drum;
guiding the second polarizing film from which the release paper is separated by rotation of the second adsorption drum to the second polarizing film attachment region;
and attaching the second polarizing film to a second surface of the panel while the panel passes through the second polarizing film attachment region;
The method of claim 1, wherein the second surface is opposite to the first surface. 25. The method of claim 24,
The first polarizing film and the second polarizing film have the same optical anisotropy,
The width of the first polarizing film unit has a size corresponding to the length of any one of a long side portion or a short side portion of the panel,
A film attachment method, characterized in that the width of the second polarizing film unit has a size corresponding to the length of the other one of a long side portion and a short side portion of the panel. delete delete delete delete delete delete delete delete delete

Images