KR102331014B1 - Apparatus for removing film and method for removing film - Google Patents

Abstract

The present invention relates to a substrate to which a film is attached, a stage for supporting the lower surface of the substrate, a winding roller that is disposed spaced apart from the upper surface of the substrate, and rotates so that the film is peeled off and wound, and the winding roller is arranged in a first direction along one side. A driving unit for horizontally moving to a point and then rising to a second point, a guide roller positioned on the horizontal movement trajectory to the first point of the take-up roller and horizontally moved together according to the horizontal movement of the guide roller and At the same time, there is provided a film removal device including a guide plate for guiding the film to be curved and parallel to the film before peeling.

Description

Film removal apparatus and method thereof

The present invention relates to a film removing apparatus and a method therefor, and more particularly, to a film removing apparatus attached to a display panel and a method therefor.

In general, a liquid crystal display device is one of the most widely used flat panel display devices at present. It consists of two display panels on which electric field generating electrodes are formed and a liquid crystal layer interposed therebetween. A display device that adjusts the transmittance of light passing through a liquid crystal layer by rearranging molecules. A polarizing plate is attached to the outside of the liquid crystal display panel composed of two display panels to produce polarized light that vibrates in a specific direction to usefully express images.

When an abnormality occurs in the attachment state of the polarizing plate due to air bubbles or foreign substances interposed between the polarizing plate and the liquid crystal display panel, the polarizing plate is removed using a polarizing plate removal device, and the polarizing plate is attached again using a polarizing plate attachment device.

As the demand for such a thin liquid crystal display increases, the thickness of the polarizing plate also becomes thinner. However, as the thickness of the polarizing plate decreases, when the polarizing plate is removed using a polarizing plate removing device, the polarizing plate is easily torn.

In order to prevent this, the rate at which the polarizing plate is peeled off from the liquid crystal display panel in the polarizing plate removing device is slowed, but in this case, the overall process speed is slowed and productivity may be reduced.

The problem to be solved by the present invention is a substrate to which a film is attached, a stage for supporting the lower surface of the substrate, a winding roller that is disposed spaced apart from the upper surface of the substrate, and rotates so that the film is peeled off and wound, the winding roller on one side A driving unit for horizontally moving to a first point along the direction and then raising it to a second point, a guide roller positioned on the horizontal movement trajectory to the first point of the take-up roller, and horizontal movement of the guide roller An object of the present invention is to provide a film removal device including a guide plate that is horizontally moved along with the film and guides the film to be curved and parallel to the film before peeling.

Another problem to be solved by the present invention is a step of horizontally moving a winding roller to be wound by peeling a film attached to a substrate to a first point, vertically raising the winding roller from a first point to a second point, the winding disposing a guide roller on the horizontal movement trajectory moved to the first point of the roller, and moving the guide roller along an extension line of the horizontal movement trajectory to the first point of the take-up roller, the first point and the second point An object of the present invention is to provide a film removal method comprising the step of horizontally moving to pass through the vertical intersection of

The problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

A film removal apparatus according to an embodiment of the present invention for achieving the above object is a substrate to which a film is attached, a stage for supporting the lower surface of the substrate, is disposed spaced apart from the upper surface of the substrate, and the film is peeled and wound A winding roller rotating so as to be possible, a driving unit for horizontally moving the winding roller to a first point in one direction and then raising it to a second point, is located on the horizontal movement trajectory of the winding roller to the first point It may include a guide roller and a guide plate for guiding the film to be curved and parallel to the film before peeling while being horizontally moved along with the horizontal movement of the guide roller.

The guide roller may include at least two unit rollers having a length in a direction perpendicular to the horizontal movement direction of the take-up roller.

The guide roller may be formed in a cylindrical shape having a length in a direction perpendicular to the horizontal movement direction of the take-up roller.

A rotation direction of the take-up roller may be the same as a rotation direction of the guide roller.

The guide plate may be formed in a rectangular plate shape having a long side length in a direction orthogonal to a traveling direction of the take-up roller.

The guide plate may include a round part on a surface opposite to the horizontal movement direction of the take-up roller.

The lower surface of the guide plate may be in close contact with the upper surface of the film.

The film in close contact with the lower surface of the guide plate may be curved while in contact with the round part, and may be formed to be in close contact with the upper surface of the guide plate.

The height of the upper surface of the guide plate may be lower than the height of the lowermost end of the guide roller with respect to the upper surface of the stage.

The outer circumferential surface of the winding roller may include a fixing part that can be fixed by inserting a portion of the edge of the film.

The driving unit may include a driving cylinder to enable the winding roller to reciprocate up and down.

The film removal method according to an embodiment of the present invention for solving the other problem includes the steps of horizontally moving a winding roller to be wound to a first point by peeling the film attached to the substrate, and moving the winding roller from the first point to the first point. vertically rising to the second point, arranging the guide roller on the horizontal movement trajectory of the take-up roller to the first point, and moving the guide roller along the extension line of the horizontal movement trajectory to the first point of the take-up roller It may include moving the horizontal movement to pass the vertical intersection of the first point and the second point.

The method may include disposing a guide plate to horizontally move along a horizontal movement trajectory of the guide roller.

The guide plate may maintain the plane forming the peeling part, which is a portion partially peeled from the substrate of the film, and the plane forming the non-peelable part before peeling from the substrate to be parallel to each other.

The details of other embodiments are included in the detailed description and drawings.

According to the film removal apparatus and the film removal method using the same according to embodiments of the present invention, it is possible to prevent damage to the film and to minimize the time required for film removal.

The effect according to the present invention is not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a cross-sectional view of a body to be peeled applied to a film removal apparatus according to an embodiment of the present invention.
2 is a perspective view of a film removal device according to an embodiment of the present invention.
3 to 7 are cross-sectional views of a process step-by-step view of a method for removing a film using a film removing apparatus according to an embodiment of the present invention.
8 is a graph showing the relative movement displacement of the guide roller, the guide plate, and the winding roller of the film removing apparatus according to an embodiment of the present invention.
9 is a perspective view of a film removing apparatus according to another embodiment of the present invention. is a perspective view.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from another. Accordingly, it goes without saying that the first component mentioned below may be the second component within the spirit of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, an object to be peeled applied to the film removal apparatus according to an embodiment of the present invention will be described.

1 is a cross-sectional view of a body to be peeled applied to a film removal device according to an embodiment of the present invention.

Referring to FIG. 1 , an object to be peeled includes a substrate 10 and a film 1 disposed on the substrate 10 .

The substrate 10 of the object to be removed may be a transparent insulating substrate such as a plastic substrate, a glass substrate, or a quartz substrate, or a semiconductor substrate. The substrate 10 may also be a substrate applied to an optical sheet or the like. Furthermore, the substrate of the object to be peeled may be a display panel of the display panel or the display panel itself.

A film is disposed on the substrate. The film may be an optical film, a protective film, a support film, or the like. The film may be mounted on the substrate or may be attached to one surface of the substrate through the adhesive layer 11 or an adhesive tape.

In this embodiment, a case in which a liquid crystal display panel is applied as a substrate and a film disposed on the substrate is a polarizing film will be described as an example.

The liquid crystal display panel includes a first substrate and a second substrate facing each other, and a liquid crystal layer interposed therebetween. A polarizing film is attached to at least one surface of the liquid crystal display panel to control the amount of light passing through the liquid crystal display panel. The polarizing film is attached to at least one surface of the liquid crystal display panel through OCA (Optically Clear Adhesive) or OCR (Optically Clear Resin).

However, when the polarizing film is attached to the liquid crystal display panel, if foreign substances are interposed or air bubbles 11a are generated, a display defect may occur. If the above defect occurs during inspection of the liquid crystal display panel, the polarizing film is peeled off and removed, and then a new polarizing film is attached to the liquid crystal display panel. In the polarizing film peeling process, it is preferable that the polarizing film does not break in the middle while retaining high workability. One embodiment of the present invention relates to a film removal apparatus having improved workability and stability of such a film removal process.

Hereinafter, a film removing apparatus according to an embodiment of the present invention will be described.

2 is a perspective view of a film removal device according to an embodiment of the present invention.

Referring to FIG. 2 , the film removing apparatus includes a stage 100 supporting an object to be peeled, a winding roller 210 and a guide roller disposed on the upper part of the stage, and a driving unit 300 for moving the winding roller 210 and the guide roller. includes

The stage 100 provides a space in which the object to be removed is seated. The stage may remain stationary while removing the film from the object to be removed. However, the present invention is not limited thereto, and a one-way motion or a reciprocating motion may be performed in a linear direction while defining a motion relative to a winding roller or the like.

The stage 100 may include a fixing member for fixing the seated object to be removed. An example of the fixing member may be a vacuum adsorption device including a vacuum hole (not shown) on the stage 100 . However, the present invention is not limited thereto, and various fixing members are applicable.

A winding roller 210 is disposed above the stage 100 . The winding roller 210 serves to wind the film 1 peeled from the object to be peeled. The winding roller 210 may be formed in a cylindrical shape. Assuming that the film peeling direction proceeds in a horizontal first direction (X) with respect to the stage 100 , the take-up roller 210 is horizontal with respect to the stage and a second direction perpendicular to the first direction (X) It may have a shape extending in the direction (Y). The winding roller 210 may be rotatably installed. A rotational force may be transmitted from the driving unit for rotation of the winding roller 210 .

A guide roller 220 is disposed above the stage 100 . The guide roller 220 serves to guide the winding direction when the film 1 is peeled off from the object to be peeled and is wound by the winding roller 210 . The guide roller 220 may be disposed adjacent to the winding roller 210 . When the winding roller 210 and the guide roller 220 are moved by the driving unit, the relative positions between the winding roller 210 and the guide roller 220 may be changed. However, despite the relative movement of the winding roller 210 and the guide roller 220 , the winding roller 210 may be positioned equal to or higher than the guide roller 220 based on the vertical position.

The guide roller 220 may have a cylindrical shape similar to the winding roller 210 . The extension direction of the guide roller 220 may be the second direction (Y). In the case of the guide roller 220, it is not necessary to be rotatably installed, but when it is rotatably installed, the film 1 may be guided more flexibly. Even in this case, the guide roller 220 does not need to transmit rotational force by the driving unit unlike the winding roller 210 , so it may be installed to the extent that it can be passively rotated by the peeling film 1 .

The driving unit drives the movement of the winding roller 210 and the guide roller 220 . The driving unit provides a rotational force to the take-up roller 210 and linearly moves the take-up roller 210 and the guide roller 220 . Specifically, the driving unit linearly moves the take-up roller 210 in a first direction (X) horizontal to the stage 100 and a third direction (Z) perpendicular to the stage. In addition, the driving unit linearly moves the guide roller 220 in the first direction (X) horizontal to the stage 100 .

Although the driving unit causes both the take-up roller 210 and the guide roller 220 to linearly move in the first direction, the linear motions of the take-up roller 210 and the guide roller 220 in the first direction may be independent of each other.

In order to move the winding roller 210 in the horizontal direction (X), the film removal device may further include a pair of first rails 301 and 302 . The pair of first rails 301 and 302 may extend in the first direction. The pair of first rails 301 and 302 may be disposed outside the stage 100 . Both ends of the winding roller 210 may be located on the pair of first rails 301 and 302 . The winding roller 210 may reciprocate in the first direction X on the pair of first rails 301 and 302 .

In order to move the guide roller 220 in the horizontal direction (X), the film removal device may further include a pair of second rails 303 and 304 . The pair of second rails 303 and 304 may extend in the first direction. The pair of second rails 303 and 304 may be disposed inside the stage 100 . Both ends of the guide roller 220 may be positioned on a pair of second rails 303 and 304 . The guide roller 220 may reciprocate in the first direction X on the second rails 303 and 304 .

The pair of second rails 303 and 304 may be located inside the pair of first rails 301 and 302 . However, the present invention is not limited thereto, and the relative positional relationship between the pair of first rails 301 and 302 and the pair of second rails 303 and 304 may be variously modified.

The driving unit may include a sprocket 303 . The sprocket 303 may be disposed outside any one of the pair of first rails 301 and 302 . Any one of both ends of the winding roller 210 may be coupled to the sprocket 303 to receive a driving force for horizontal movement from the sprocket 303 . In the drawing, only the sprocket 303 for the winding roller 210 is illustrated as an example, but other sprockets that provide a driving force for horizontal movement of the guide roller 220 may be further provided.

Although not shown in the drawings, the driving unit may include a driving cylinder using hydraulic pressure or pneumatic pressure to linearly move the winding roller 210 in the vertical direction (third direction; Z).

The film removal device may further include a guide plate 230 . The guide plate 230 is not coupled to the stage 100 or other members of the film removal device, but may be provided separately.

The guide plate 230 may have a shape extending in one direction. At both ends of the guide plate 230, mounting grooves that are mounted on a pair of second rails (or a pair of first rails) and can move on the rails may be provided. The guide plate 230 may be mounted on the second rails 303 and 304 after the vertical direction (Z) movement of the winding roller 210 is completed. In this case, the guide plate 230 may be positioned at the rear side of the guide roller 220 based on the traveling direction, and the upper surface height of the guide plate 230 may be positioned lower than the lowermost height of the guide roller 220 .

The guide plate 230 may include a round part 231 on a surface opposite to the horizontal movement direction of the winding roller 210 . The round part 231 gently curves the film that is in surface contact with the upper surface of the guide plate 230 via the rear side of the guide plate 230 so that the sliding proceeds smoothly. That is, the lower surface of the guide plate 230 is in close contact with the film 1 before peeling, and the upper surface of the guide plate 230 is in close contact with the film 1 after peeling.

Subsequently, a film removal method using the film removal apparatus according to an embodiment of the present invention made as described above will be described.

3 to 7 are cross-sectional views of a process step-by-step process of a method for removing a film using a film removing apparatus according to an embodiment of the present invention.

First, referring to FIG. 3 , a skin adherend is disposed on a stage. At this time, the operator removes a portion of one edge of the film 1 and inserts it into the insertion groove 212 of the fixing unit 211 and rotates the winding roller through the driving unit. A portion of the edge of the film 1 is fixed to the insertion groove 212 of the fixing part 211 so that the winding roller 210 rotates and the film 1 starts to be wound on the winding roller 210 . Accordingly, the film 1 begins to peel from the substrate 10 . In the present embodiment, it is shown that a part of the edge of the film 1 is fixed to the fixing part 211 of the winding roller 210 , but the means capable of fixing the edge of the film 1 is not limited thereto.

Thereafter, as shown in FIG. 4 , the winding roller 210 performs horizontal movement along the first direction (X) and vertical movement along the third direction (Z). That is, the winding roller 210 can be horizontally moved along the first direction (X) to move horizontally to the first point (P1) and then vertically rise to the second point (P2) along the third direction (Z). have.

Thereafter, as shown in FIG. 4 , the guide roller 220 and the guide plate 230 are disposed. The guide roller 220 may be disposed in a direction to press the upper surface of the film 1 downward, and the guide plate 230 may be disposed to be in close contact with the portion between the films 1 curved in an approximately U shape. have. That is, as shown in FIG. 5 , the lower surface of the guide plate 230 is in close contact with the non-peelable portion (the film portion attached to the substrate), which is a non-peelable portion of the film 1 , and the upper surface of the guide plate 230 is It adheres to the peeling portion (film peeled from the substrate), which is the peeled portion of the film 1, and functions to maintain a state in which the plane formed by the non-peelable portion and the plane formed by the peeling portion are mutually parallel. At this time, the guide roller 220 maintains a predetermined tension by pressing the upper surface of the film 1 peeled by the guide plate 230 to a predetermined pressure so that the film 1 is easily wound on the winding roller 210 . do.

Thereafter, as shown in FIG. 6 , the guide roller 220 is horizontally moved to the first point P1 and the guide plate 230 is moved by the distance the guide roller 220 is horizontally moved to the first point P1 . make it possible

Thereafter, as shown in FIG. 7 , the guide roller 220 passes through the point intersecting the water line of the first point P1, passes the winding roller 210, moves to the end of the film 1, and the guide plate ( 230 is also horizontally moved along the guide roller 220 . Next, when the guide roller 220 completes the movement to the end of the film 1 , the film 1 is all wound around the winding roller 210 .

8 is a graph showing the relative movement displacement of the guide roller, the guide plate, and the winding roller applied to the film removal apparatus according to an embodiment of the present invention. Referring to FIG. 8 , sequential relative movement displacements of the winding roller 210 , the guide roller 220 , and the guide plate 230 as described above are shown. That is, the winding roller 210 starts to move from point a, moves horizontally to point b, and then rises to point c.

Thereafter, the guide roller 220 is disposed at the point d, which is an earlier position than the point b, where the vertical line at the point c at the point c of the winding roller 210 meets, and the guide plate 230 is located at the point f, which is a position behind the guide roller 220. are placed Thereafter, the guide roller 220 moves to point e, and at the same time, the guide plate 230 moves to point g.

9 is a perspective view of an apparatus for removing a film according to another embodiment of the present invention. Referring to FIG. 9 , the guide roller 220 is different from the configuration of the embodiment shown in FIG. 1 in that the guide roller 220 is composed of a plurality of unit rollers 221 and 222 . That is, instead of forming the guide roller 220 into a single cylindrical shape having a length in a direction perpendicular to the horizontal movement direction of the winding roller 210, at least two pieces having a minimum length capable of supporting the film 1 By supporting it with the unit rollers 221 and 222, it has an effect of cost reduction.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

1: film
10: substrate
11: adhesive layer
210: winding roller
220: guide roller
221, 222: unit roller
230: guide plate
231: round part
300: drive unit
301, 302: rail
303: sprocket

Claims (14)

a substrate to which the film is attached;
a stage for supporting a lower surface of the substrate;
a winding roller disposed to be spaced apart from the upper surface of the substrate and rotating so that the film is peeled and wound;
a driving unit for horizontally moving the winding roller only to a first point in one direction and then raising it to a second point;
a guide roller positioned on the horizontal movement trajectory to the first point of the winding roller and performing only horizontal movement; and
and a guide plate for guiding the film to be curved and parallel to the film before peeling while being horizontally moved at the same speed according to the horizontal movement of the guide roller,
The guide roller moves horizontally from a third point located on the horizontal movement trajectory and located on one side of the first point to a fourth point located on the extension line of the horizontal movement trajectory and located on the other side of the first point film removal device. According to claim 1,
The guide roller is a film removal device including at least two unit rollers having a length in a direction perpendicular to the horizontal movement direction of the take-up roller. According to claim 1,
The guide roller is a film removal device formed in a cylindrical shape having a length in a direction perpendicular to the horizontal movement direction of the winding roller. According to claim 1,
A film removing device in which the direction of rotation of the winding roller is the same as the direction of rotation of the guide roller. According to claim 1,
The guide plate is a film removing device formed in a rectangular plate shape having a long side length in a direction perpendicular to the traveling direction of the take-up roller. 6. The method of claim 5,
The guide plate is a film removal device including a round portion on the opposite side of the horizontal movement direction of the take-up roller. 7. The method of claim 6,
A film removal device in which the lower surface of the guide plate is in close contact with the upper surface of the film. 8. The method of claim 7,
A film removal device formed so that the film in close contact with the lower surface of the guide plate is curved while in contact with the round part, and is in close contact with the upper surface of the guide plate. 9. The method of claim 8,
The upper surface height of the guide plate is lower than the height of the lowermost end of the guide roller with respect to the upper surface of the stage. According to claim 1,
A film removal device including a fixing part that can be fixed by inserting a portion of the edge of the film on the outer peripheral surface of the winding roller. According to claim 1,
The driving unit is a film removal device including a driving cylinder to enable the winding roller to reciprocate up and down. horizontally moving the winding roller to be wound by peeling the film attached to the substrate only to a first point;
vertically raising the take-up roller from a first point to a second point;
disposing a guide roller on a horizontal movement trajectory that has moved to a first point of the take-up roller;
disposing a guide plate to horizontally move at the same speed along the horizontal movement trajectory of the guide roller; and
The guide roller is moved along an extension line of the horizontal movement trajectory to the first point of the take-up roller, and the guide roller is positioned on one side of the first point and is located on the horizontal movement trajectory from a third point to the first point And a film removal method comprising the step of performing only horizontal movement to a fourth point located on the extension line through the vertical intersection of the second point and located on the other side of the first point. delete 13. The method of claim 12,
The guide plate is a film removing method for maintaining the plane forming the peeling portion, which is a portion partially peeled from the substrate of the film, and the plane forming the non-peelable portion before being peeled from the substrate to be parallel to each other.

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