TWI727208B - A conveying device for conveying long optical films with slits, and a continuous manufacturing system for optical display panels - Google Patents

Abstract

[Abstract] A conveying device is provided, which can prevent the optical film from being generated from the slit in the state of being set on the roller when the conveying is stopped when the optical film with slits is conveyed by the conveying device with rollers The situation set off. The conveying device has: a single conveying direction change roller, the release film is set to the inside to set the long optical film within a predetermined angle range, and move in a predetermined direction; the roller drive unit makes the conveying direction change roller to the predetermined direction Move; Judgment part to judge whether the slit will be stopped at the part of the long optical film where the conveying direction changes the roller when the transport of the long optical film has been stopped; and the roller drive control part, based on the judgment result To control the roller drive unit, the conveying direction changing roller is moved in a predetermined direction so that when the conveying is actually stopped, the slit does not stop at the part where the conveying direction changing roller is installed.

Description

A conveying device for conveying long optical films with slits, and a continuous manufacturing system for optical display panels Invention field

The present invention relates to a conveying device for conveying a long optical film with slits, and a continuous manufacturing method and continuous manufacturing system of an optical display panel.

Background of the invention

Among the laminated films of the multilayer structure, for example, a so-called half-cut method of cutting the laminated film without cutting the outermost separator film is known. In this half-cutting, when the cut part (cut seam) is set to the outside and erected (encircled) on the rollers, the "lifting" of the laminated film (or sometimes called the slit end) will occur from the cutting seam. The peeling of the part, the floating of the end of the slit). This "lifting up" is apparent when the transfer line of the laminated film stops, and when the slit of the laminated film is located at the position surrounded by the roller.

Patent Document 1 discloses a peeling prevention device that can prevent "lifting" that occurs when an optical film is being transported, especially when the transport direction is changed by 90° or more.

Prior art literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 2009-186996 Bulletin

Summary of the invention

In the case of the peeling prevention device shown in FIG. 7 of Patent Document 1, because there is a gap between the pressing member and the optical film, when the film transport is stopped, the concern is that the optical film is lifted up and contacts the pressing member . If the optical film is lifted up and is in contact with the pressing member, if the conveyance is restarted, the optical film will be lifted as it is in a state of abutting the pressing member, and the subsequent optical member will also be lifted. In addition, the optical film that has been lifted up in the above-mentioned gap may become clogged, making it impossible to convey the optical film.

Although in the case of the peeling prevention device shown in FIG. 8 of Patent Document 1, the optical film is transported while sandwiching the optical film with a plurality of small-diameter rollers, the concern is that when the slit stops between the small-diameter rollers When there is a gap, the tip of the film will be lifted up in the same way. If the optical film is lifted and the conveyance is started in this state, it will contact the small-diameter rollers and the lift will proceed further.

In the case of the peeling prevention device shown in FIG. 9 of Patent Document 1, the optical film is sandwiched by the surface of the ring-shaped sheet, so although the structure of FIG. 7 and FIG. 8 is lifted up, it will not produce , But it will become a complex device. In addition, even when the film conveying line is not stopped, the ring-shaped sheet is in contact with the optical film at any time, and there is a concern that the optical film is rubbed by the ring-shaped sheet.

In the case of the peeling prevention device shown in Fig. 10 of Patent Document 1, the optical film can be clamped on the surface in a physically non-contact manner by spraying air. The problem or the friction problem as shown in Figure 9 will not occur, but it will still become a complicated device. In addition, there are doubts that the air flow in the manufacturing device is disturbed due to the method of spraying air, and foreign objects are stirred.

Therefore, the object of the present invention is to provide a conveying device that can prevent the slits from being placed on the rollers when the conveyance is stopped when the optical film with slits is conveyed by the conveying device with rollers. The situation that caused the rise of the optical film.

In addition, another objective is to provide a continuous manufacturing system for optical display panels, which does not cause any lifting from the slits of the optical film when the transport is stopped, and can continuously produce optical display panels.

In order to solve the above-mentioned problems, the following present invention has been completed as a result of painstaking research.

The present invention is a conveying device that conveys a long optical film. The long optical film has a slit (S) in the direction orthogonal to the longitudinal direction, that is, in the width direction, and the long optical film has at least An optical functional film and a release film laminated with the optical functional film via an adhesive layer, and a slit is formed on the optical film from which the release film is removed, and the conveying device has: a single conveying direction changing roller ，Set the aforementioned release film to the inside To set the long optical film within a predetermined angle (θ) range and move in a predetermined direction; the roller drive unit makes the transport direction change roller move in the predetermined direction; the judging unit judges the length of the long optical film When the transport is stopped, whether the slit will stop at the portion of the long optical film where the transport direction changes the roller (roller contact portion); and the roller drive control unit, based on the judgment result of the judgment unit to control the aforementioned The roller drive unit moves the conveying direction changing roller to the predetermined direction so that when the conveying is actually stopped, the slit does not stop at the portion (roller contact portion) erected on the conveying direction changing roller.

The "predetermined angle range" refers to the range of the angle θ (refer to FIG. 3) formed by the upstream optical film and the downstream optical film with the conveying direction changing roller as the center, and is greater than 0° and at 180° The following is also possible. θ of 0° means that the optical film on the upstream side and the optical film on the downstream side are in a straight line, and θ of 180° means that the transport direction of the optical film on the upstream side and the transport direction of the downstream optical film are parallel to each other and become The reverse situation. Depending on the arrangement of the guide rollers, the angle θ may exceed 180°. The angle θ corresponds to the change range of the conveying direction.

The "predetermined direction" is, for example, an upward direction or a downward direction, and may also be a horizontal direction along the upstream or downstream side of the conveying direction.

The judging unit of the above-mentioned invention can also judge whether the slit will stop at the long optical strip when the transport is actually stopped when a stop signal for stopping the transport is received from a predetermined device. The film is erected on the part (roller contact part) where the conveying direction changes roller.

The slits of the above-mentioned invention may be formed at regular intervals in the longitudinal direction of the elongated optical film. In addition, the slit may be formed to include a plurality of different intervals in the longitudinal direction of the elongated optical film.

In the above-mentioned invention, as the range of change in the conveying direction, a range greater than 0° and less than 180° can be exemplified.

The aforementioned single conveying direction changing roller of the above-mentioned invention may be a structure of a dancer roller that is movable in the vertical direction or the horizontal direction with respect to the conveying device. The aforementioned single conveying direction changing roller may be configured to rotate around an axis orthogonal to the conveying direction.

The tension roller may constitute a path length changing part, and the path length changing part changes the length of the conveying path of the long optical film, that is, the path length. The path length changing unit may also be an accumulation device.

In the above invention, the slits are cut at a certain interval, and the upward or downward movement of the tension roller is preset to a certain value.

For example, when one piece of optical film is attached to the optical cell, and the upstream line is stopped, it can be controlled to: if there is one tension roller, the tension roller is raised. For half of the amount of one film, if there are two tension rollers, the tension roller is raised corresponding to 1/4 of the amount of one film.

In addition, even if the so-called skip cut method is included and the slits are not spaced at a certain interval, it can be controlled to determine whether the slit is stopped at the roller contact portion, and the In the case of the judgment result of the kerf stop, the single conveying direction change roller (tension roller) is moved from the predetermined value to the predetermined direction (upward or downward) by a predetermined amount (or less than that). The method of reducing the movement by a predetermined amount by means of a prescribed value, so that the slitting does not stop at the contact part of the roller.

In addition, even in the event of an unexpected transport stop such as an emergency, it can be controlled to stop the slit at the roller contact portion by changing the roller (tension roller) from a single transport direction. The preset specified value is moved in the predetermined direction (upward or downward) by a predetermined amount (or by an amount that does not move a predetermined amount from the specified value) so that the slit does not stop at the roller contact portion.

In the above-mentioned invention, it is also possible that: in the case where the slits of the elongated optical film are formed at a certain interval, the interval (D2) of the slits of the elongated optical film used in the next production ) Is the conveying direction obtained by projecting the arrangement of the aforementioned conveying direction change roller along the plane of the aforementioned long optical film when the gap between slits (D1≠D2) used in the previous production has been changed It is moved to the upstream side or the downstream side and arranged so that when the conveyance of the long optical film has been stopped, the slit does not stop at the portion (roller contact portion) installed on the roller.

"Planar projection" can be achieved by projecting a long optical film onto the Obtained on a plane such as the ground of the device. "Movement to the upstream or downstream side in the conveying direction by plane projection" means moving in a direction parallel to the conveying direction with respect to the conveying direction, and does not include the up-down direction and the left-right direction.

It can also be a case where the aforementioned slit interval (D2) of the long optical film used in the next production has been changed from the slit interval (D1≠D2) used in the previous production It is a configuration that includes the following situations: in the half-cut that forms slits at a certain interval, the cutting interval of the half-cut of the optical film roll used in the next production is from the half-cut of the optical film roll used in the previous production If the cutting interval is changed; or in a slit-containing optical film roll wound on a long optical film with slits at a certain interval in advance, the slit-containing optical film roll used in the next production The fixed interval of the slit of the optical film roll is changed from the specified interval of the slit of the optical film roll used in the previous production.

In this way, when it is known in advance that the slitting will stop at the conveying direction change roller due to the change in the specifications of the long optical film, by changing the position of the conveying direction of the changing roller relative to the conveying direction, The frequency of the up and down movement of the conveying direction change roller decreases. It is particularly effective when the slits are formed at a certain interval, but under the principle of forming the slits at a certain interval, it is effective even in rare cases where the interval is small or large.

According to the above invention, the single conveying direction changing roller is moved when the conveying is stopped, and the slit is not stopped at the conveying direction changing roller, so that the optical film can be appropriately prevented from being lifted.

The conveying device of another invention is a conveying device for a long optical film. The long optical film has slits in the direction orthogonal to the longitudinal direction, that is, in the width direction, and the long optical film has at least an optically functional film. , And a release film laminated with the optical function film through an adhesive layer, and the optical film from which the release film is removed is formed with slits at regular intervals, and the transport device has the release film set to One or more conveying direction change rollers to set the aforementioned long optical film within a predetermined angle range on the inside, the interval (D2) of the aforementioned slits of the long optical film used in the next production is already If the gap between slits (D1≠D2) used in the previous production has been changed, the arrangement of the rollers for changing the conveying direction should be arranged to the upstream side along the conveying direction of the long optical film plane projection. Or it may be moved on the downstream side so that when the transport of the long optical film has been stopped, the slit does not stop at the portion of the long optical film where the transport direction changing roller is installed (roller contact portion).

"Planar projection" can be obtained by projecting a long optical film onto a plane such as the ground where the device is installed. "Movement to the upstream or downstream side in the conveying direction by plane projection" means moving in a direction parallel to the conveying direction with respect to the conveying direction, and does not include the up-down direction and the left-right direction.

The "predetermined angle range" refers to the range of the angle θ (refer to FIG. 3) formed by the upstream optical film and the downstream optical film with the conveying direction changing roller as the center, and is greater than 0° and at 180° The following is also possible. θ of 0° means that the optical film on the upstream side and the optical film on the downstream side are in a straight line, and θ of 180° means that the transport direction of the optical film on the upstream side and the transport direction of the downstream optical film are parallel to each other and become The reverse situation. Depending on the arrangement of the guide rollers, the angle θ may exceed 180°. The angle θ corresponds to the change range of the conveying direction.

Here, it may also have the following configuration: the interval (D2) of the aforementioned slits of the long optical film used in the next production is the interval (D1≠D2) of the slits used in the previous production. The case of over-change includes the following situations: in the half-cut that forms slits at a certain interval, the cutting interval of the half-cut of the optical film roll used in the next production is changed from the optical film used in the previous production. The case where the cutting interval of the half-cut of the film roll is changed; or the slit-containing optical film roll wound on a long optical film with slits formed in advance at a certain interval will be used in the next production The fixed interval of the slits of the slit-containing optical film roll is changed from the slits of the slit-containing optical film roll used in the previous production.

According to the above invention, when it is known in advance that the slit is stopped on the conveying direction change roller due to the change in the specifications of the long optical film formed with slits at regular intervals, the The conveying direction of the optical film is projected on a plane to change the position of the conveying direction changing roller, and there is no situation that the slit stops at the conveying direction changing roller, so the optical film can be appropriately prevented from lifting.

A continuous manufacturing system for an optical display panel of another invention includes a manufacturing device and the aforementioned conveying device, wherein the aforementioned manufacturing device is to bond a first optical film having at least an optically functional film to the first surface of an optical cell, and A second optical film having at least an optically functional film is bonded to the second surface of the optical unit to manufacture an optical display panel.

In the above-mentioned invention, the following configuration may also be adopted: the aforementioned manufacturing device is configured to: while feeding out the first long optical film from the first optical film roll, while leaving the long first release film and cutting it A single sheet of first optical film obtained from the first long optical film is attached to the first surface of the transported optical unit, or a single sheet of first optical film is attached to the optical unit And/or the second long optical film is sent out from the second optical film roll on one side, and the second long release film is left on one side, and the second long optical film will be cut off. The single-piece second optical film is attached to the second optical unit of the transported optical unit so that the optical axis of the first optical film and the optical axis of the second optical film are arranged at a predetermined angle. Or attach a single-piece second optical film to the second surface of the optical unit such that the optical axis of the first optical film and the optical axis of the second optical film are arranged at a predetermined angle .

According to the above invention, the optical display panel can be continuously produced without lifting from the slit of the optical film when the transport is stopped.

In the present invention, the "optical film roll" is a long release film and a long optical film (adhesive layer, optical function film, and surface protection film) that are laminated in this order and are configured in a roll shape.

The "roll to panel method" is to apply the following method to the release film and long optical film sent from the optical film roll: leave the release film and put the adhesive layer, optical function film and surface protection film in the width Cut (half cut) in the direction, and peel the long release film from the cut single-piece optical film, and bond the single-piece optical film to the optical film through the exposed adhesive layer unit.

On the other hand, as an optical film bonding method different from the roll to panel method, there is a "sheet to panel method". The "sheet to panel method" is a single-sheet optical film that has been pre-formed into a single-sheet state, and the adhesive layer is exposed by peeling off the single-sheet release film or long release film. To attach to the optical unit.

"Slit optical film roll" is a single sheet of optical film (adhesive layer, optical function film and surface protection film) arranged in the longitudinal direction and laminated on a long release film, and the structure is The composition of the roll.

5: LCD unit

5a: First side (1st substrate)

5b: Second side (2nd substrate)

10: The first long optical film laminate

11: The first long strip of polarizing film

12: The first long release film

20: The second long optical film laminate

21: The second long strip of polarizing film

22: The second long release film

31: The first tension roller

32: The second tension roller

34, 35, 38, 39, 234, 235, 238, 239: guide roller

36, 236: adjust the tension roller

40: The first cutting part

40a: The first adsorption part

50: The first peeling part

61: The first winding part

80: The first attachment part

81: The first sticking roller

82: The first drive roller

100: Continuous manufacturing device

110: The first release film conveying device

111: The first monolithic polarizing film

120: Panel transport device

210: The second release film conveying device

211: The second monolithic polarizing film

240: The second cutting part

240a: The second suction part

250: second peeling part

261: The second winding part

280: The second attachment part

281: The second sticking roller

282: second drive roller

301: Wheel drive

302: Wheel drive control unit

303: Judgment Department

361a: Roller contact part

A1: The first path length change part

A2: The third path length change section

B1: The second path length change part

B2: The fourth path length change section

D1, D2: interval

L1: distance

P1: first position

P2: second position

R1: The first optical film roll

R2: Second optical film roll

S, S2: slitting

Y: LCD panel

θ: Angle

x: route

FIG. 1A is a schematic diagram showing an example of the continuous manufacturing system of the optical display panel of the first embodiment.

1B is a schematic diagram showing an example of the continuous manufacturing system of the optical display panel of the first embodiment.

Fig. 2 is a diagram showing a state of movement of a tension roller.

Fig. 3 is a diagram for explaining the angle θ.

4A is a schematic diagram showing an example of the continuous manufacturing system of the optical display panel of the second embodiment.

4B is a schematic diagram showing an example of the continuous manufacturing system of the optical display panel of the second embodiment.

The form used to implement the invention

(Embodiment 1)

Hereinafter, while referring to FIGS. 1A, 1B, and 2, the continuous manufacturing system and continuous manufacturing method of an optical display panel will be explained in more detail, but the present invention is not limited to the aspect of the invention of the embodiment.

The optical display panel is described as a liquid crystal display panel, the optical unit is described as a liquid crystal cell, and the optical film is described as a polarizing film.

The continuous manufacturing system of the liquid crystal display panel of this embodiment has a continuous manufacturing apparatus 100. The continuous manufacturing apparatus 100 is obtained by cutting the first long polarizing film 11 while feeding the first long release film 12 and the first long polarizing film 11 from the first optical film roll R1. A monolithic polarizing film 111 is attached to the first surface 5a of the liquid crystal cell 5. In addition, the continuous manufacturing apparatus 100 cuts the second long polarizing film 21 while feeding the second long release film 22 and the second long polarizing film 21 from the second optical film roll R2. Second order The sheet-shaped polarizing film 211 is attached to the second surface 5b of the liquid crystal cell 5 in such a way that the absorption axis of the first monolithic polarizing film 111 and the absorption axis of the second monolithic polarizing film 211 are orthogonal to each other, and Manufacture liquid crystal display panel Y.

The continuous manufacturing system of a liquid crystal display panel is a series of panel conveying devices 120 that dispose the continuous manufacturing device 100 on the liquid crystal cell 5 and the liquid crystal display panel Y. Although the route of the panel transport device 120 is drawn as a straight line with x, it is not limited to a straight line.

(Optical film roll)

As an optical film roll formed by winding a long polarizing film, for example, (1) a long optical film laminate in the form of a continuous long (web) having a long polarizing film is wound into a roll, wherein The aforementioned long polarizing film includes a release film and an adhesive layer formed on the release film. In this case, the continuous manufacturing system of liquid crystal display panels has a cutting device (forming slits) in order to form a monolithic polarizing film (sheet) from a long polarizing film. The aforementioned cutting device is a release The film is left, and the long polarizing film (including the adhesive layer) is cut (half-cut) at predetermined intervals in a direction orthogonal to the feed direction of the release film.

In addition, as an optical film roll, for example, (2) a long optical film laminate is wound into a roll (a so-called slit-containing polarizing film roll), and the long optical film laminate has a release film , And a single piece of polarizing film (including an adhesive layer) adjacent to each other in the direction orthogonal to the feed direction of the release film via a slit on the release film.

The first optical film roll R1 shown in FIG. 1A is a roll in which the first long optical film laminate 10 is wound into a roll shape. The film laminate 10 has a first long release film 12, and a first long release film 12 formed on the first long release film 12 via an adhesive layer and having an absorption axis parallel to the feeding direction (long side direction). A long polarizing film (including the adhesive layer) 11.

The second optical film roll R2 shown in FIG. 1B is a roll in which the second long optical film laminate 20 is wound into a roll. The second long optical film laminate 20 has a second long release film 22, And a second long polarizing film (including the adhesive layer) 21 having an absorption axis parallel to the feeding direction (long side direction) formed on the second long release film 22 via the adhesive layer.

The first and second long polarizing films 11, 21 are, for example, polarizers (with a thickness of about 5 to 80 μm), and a polarizer protective film (thickness Generally, it is about 1~500μm).

Examples of other films constituting the first and second long polarizing films 11 and 21 include retardation films (generally 10 to 200 μm in thickness), viewing angle compensation films, brightness enhancement films, and surface protection films. The thickness of the first and second long polarizing films 11 and 21 can be, for example, a range of 10 μm to 500 μm.

The adhesives constituting the adhesive layers of the first and second elongated polarizing films 11 and 21 are not particularly limited, and examples include acrylic adhesives, silicone adhesives, and polyurethane adhesives. The thickness of the adhesive layer is preferably in the range of, for example, 10 to 50 μm. The first and second release films 12 and 22 can use conventionally known films such as plastic films (for example, polyethylene terephthalate-based films, polyolefin-based films, etc.). Also, it can be According to the needs, a film prepared by coating with an appropriate release agent such as a silicone-based, long-chain alkyl-based, fluorine-based, or molybdenum sulfide, etc., is used as compared to the conventional appropriate film.

(LCD panel)

The liquid crystal display panel Y is a panel in which at least a polarizing film is formed on one side or both sides of the liquid crystal cell 5, and a driving circuit can be incorporated as needed. The liquid crystal cell 5 may use any type of cell such as a vertical alignment (VA) type, or an in-plane switching (IPS) type. The liquid crystal cell 5 has a structure in which a liquid crystal layer is sealed between a pair of substrates (the first substrate 5a and the second substrate 5b) arranged to face each other.

(Continuous manufacturing equipment)

The continuous manufacturing apparatus 100 has a first release film transport device 110, a first application unit 80, a second release film transport device 210, and a second application unit 280.

As shown in FIG. 1A, the first release film transport device 110 transfers the first long release film 12 and the first long polarizing film 11 (first long optical film laminate 10) from the side of the first optical film roll R1. ) Is sent out while being transported to the first attaching part 80.

In this embodiment, the first release film conveying device 110 has a first path length changing part A1, a first cutting part 40, a second path length changing part B1, a first peeling part 50, and a first winding part 61 .

The first path length changing unit A1 is configured to include a plurality of conveying direction changing rollers. The plural conveying direction changing rollers are provided with the first long release film 12 being set to the outside to set up the first long polarizing film 11 (first long optical film laminate 10) guide rollers (upstream roller and downstream roller), first and second tension rollers 31, 32 that can move up and down, and release the first long strip of film The first, second, and third guide rollers (not shown) of the first elongated polarizing film 11 (the first elongated optical film laminate 10) are set up as the inner side.

The first cutting part 40 is to fix the first long optical film laminate 10 in advance from the first long release film 12 side by the first suction part 40a, and leave the first long release film 12 as it is The first long polarizing film (including the adhesive layer) 11 is cut in the width direction in the state of, and a first monolithic polarizing film 111 is formed on the first long release film 12.

Examples of the first cutting portion 40 include a cutter, a laser device, and the like. The first suction portion 40a may also be, for example, a suction plate that has a plurality of holes connected to a vacuum pump and can suck air through the holes under negative pressure.

The second path length changing part B1 has a single conveying direction changing roller. The conveying direction changing roller is constituted by an adjusting tension roller 36 that can move the first long polarizing film 11 (first long optical film laminate 10) by setting the first long release film 12 inside to erect the first long polarizing film 11 (first long optical film laminate 10). The second path length changing part B1 may have a guide roller. The specific control method for adjusting the tension roller 36 will be described later.

The first release film conveying device 110 may have a pair of guide rollers 34 and 35 between the first cutting portion 40 and the second path length changing portion B1. It is also possible that either or both of the pair of guide rollers 34 and 35 are driving rollers.

In addition, the first release film transport device 110 may have guide rollers 38 and 39 between the second path length changing portion B1 and the first peeling portion 50.

In the present embodiment, in the downstream of the first cutting part 40, the first long release film 12 is set inside to bridge the first long polarizing film 11 (first long optical film laminate 10) Although the roller has only the tension adjustment roller 36, it is not limited to this.

In this embodiment, all the guide rollers on the downstream side of the second path length changing portion B1 are provided with the first long release film 12 on the outside to erect the first long polarizing film 11 (first long The roller of the optical film laminate 10).

In the first peeling part 50, the first long release film 12 is set inside at its front end to be folded back, and the first single-piece polarizing film 111 is peeled from the first long release film 12. The peeled first single-sheet polarizing film 111 is supplied to the first attaching part 80.

In the present embodiment, a sharp edge portion is used as the first peeling portion 50 at its tip, but it is not limited to this.

The first winding part 61 can wind the first long release film 12 peeled from the first single-sheet polarizing film 111. The first winding part 61 can also be formed by an automatic rotating roller.

The first attaching part 80 peels off the first long release film 12 by the first peeling part 50 from one of the sides (first side 5a) of the liquid crystal cell 5 conveyed by the panel conveying device 120 The first monolithic polarizing film 111 is attached through the adhesive layer.

In this embodiment, the first attaching part 80 is a first attaching roller 81, and a first drive roller 82.

As shown in FIG. 1B, various devices for attaching the second monolithic polarizing film 211 to the other surface (second surface 5b) of the liquid crystal cell 5 can use the various components and devices described above.

The second release film conveying device 210 is to send the second long release film 22 and the second long polarizing film 21 (the second long optical film laminate 20) from the second optical film roll R2 to the first Second, the attachment part 280 is transported.

In this embodiment, the second release film conveying device 210 has a third path length changing part A2, a second cutting part 240, a fourth path length changing part B2, a second peeling part 250, and a second winding part 261 .

The second release film conveying device 210 can be configured by the same device as the first release film conveying device 110, and the second attaching portion 280 can be configured by the same device as the first attaching portion 80.

For example, the third path length changing unit A2 can be configured by the same device as the first path length changing unit A1.

The second cutting portion 240 and the second suction portion 240a can be configured by the same device as the first cutting portion 40 and the first suction portion 40a.

The fourth path length changing unit B2 can be configured by the same device as the second path length changing unit B1.

The second winding part 261 can be configured by the same device as the first winding part 61.

The second sticking roller 281 and the second driving roller 282 can be constructed by the same device as the first sticking roller 81 and the first driving roller 82.

The fourth path length changing part B2 has a single conveying side To change the scroll wheel. The conveying direction changing roller is constituted by an adjusting tension roller 236 that can move the second long polarizing film 21 (the second long optical film laminate 20) by setting the second long release film 22 inside to erect the second long polarizing film 21 (second long optical film laminate 20). The fourth path length changing part B2 may have a guide roller.

The second release film conveying device 210 may also have a pair of guide rollers 234 and 235 between the second cutting portion 240 and the fourth path length changing portion B2. It is also possible that either or both of the pair of guide rollers 234 and 235 are driving rollers.

In addition, the second release film transport device 210 may have guide rollers 238 and 239 between the fourth path length changing part B2 and the second peeling part 250.

In this embodiment, the second long release film 22 is set to the inner side in the downstream of the second cutting part 240, and the second long polarizing film 21 (the second long optical film laminate 20) is erected. Although the roller has only the tension adjustment roller 236, it is not limited to this.

In the present embodiment, all the guide rollers on the downstream side of the fourth path length changing portion B2 are provided with the second long release film 22 on the outside to bridge the second long polarizing film 21 (second Roller of the long optical film laminate 20).

The panel conveying device 120 is a series of conveying devices for conveying the liquid crystal cell 5 and attaching the first and second monolithic polarizing films 111 and 211 to the liquid crystal display panel Y on both sides of the liquid crystal cell 5. This panel transport device 120 is configured to include, for example, transport rollers, suction plates, and the like. In this embodiment, the panel conveying device 120 is provided with a winding mechanism for horizontally rotating the liquid crystal cell 5 to which the first monolithic polarizing film 111 is attached by 90°, and A reversing mechanism that reverses the liquid crystal cell 5 to which the first single-sheet polarizing film 111 is attached.

(Control method to adjust the tension roller)

The roller drive unit 301 moves the tension adjustment roller 36 in a predetermined direction (in the present embodiment, the upward direction or the downward direction). Examples of the roller drive unit 301 include linear actuators such as cylinders, hydraulic cylinders, and electric cylinders, but are not limited to these.

In addition, it is also possible to use a configuration in which the tension adjusting roller 36 is pulled up with a hammer through a guide, and the upward tension can be applied at any time. A hammer can be used to maintain the state of applying tension to the long polarizing film at any time, and the tension adjustment roller can be moved up and down in conjunction with the adjustment of the film feed amount before and after the tension roller.

The judging unit 303 judges whether or not the slit S will be stopped when the first long polarizing film 11 (first long optical film laminate 10) is being transported. The portion of the tension roller 36 (roller contact portion 361a).

The roller drive control unit 302 controls the roller drive unit 301 based on the judgment result of the judgment unit 303 to move the tension adjustment roller 36 in a predetermined direction (upward or downward in this embodiment) so that it is actually When the conveyance is stopped, the slit S is not stopped at the portion (roller contact portion 361a) installed on the tension adjusting roller 36.

For example, the judgment unit 303 judges whether the slit S is to be located at the roller contact portion 361a based on the position data of the slit S obtained in advance.

The position data of the slit S may be the data obtained from the cutting position data when the first long polarizing film 11 is cut in the width direction thereof, or it may be obtained from the specified data after the slit S is formed. The data obtained from the image data of the slit position captured by the imaging unit may also be the data obtained from the detection data of the slit position detected by an optical sensor.

Furthermore, if the first long polarizing film with slits is not provided with the first cutting part 40, and the first long polarizing film with slits is wound into a roll-shaped optical film roll, it can also be obtained from a storage medium storing slit position data (This machine's personal computer or server's various memories, radio frequency identification tags, etc.) or coded data (QR code (registered trademark), and barcode, etc.) to obtain.

In addition, when the transport of the first long optical film laminate 10 has been stopped, the determining unit 303 may analyze the image data of at least the roller contact portion 361a captured by the imaging unit to determine whether the slit S is located on the roller. Contact portion 361a.

As the stop of the conveyance of the first long optical film laminate 10, for example, a conveyance stop performed by an operator's operation, and a first attaching portion 80 performs the first single-sheet polarizing film 111 to the liquid crystal cell 5, for example. Transport stop when attaching processing, transport stop when work ends, etc.

When the slit interval is constant, since the length of the first single-sheet polarizing film 111 in the conveying direction is all the same in the attaching process performed by the first attaching part 80, is it possible to make slit S? The location of the roller contact portion 361a is clearly known in advance. For example, during the period when one sheet of the first single-sheet polarizing film is attached to the liquid crystal cell 5, and the upstream conveying line is stopped, it is controlled to: if the tension roller 36 is adjusted to 1 When the tension roller 36 is lowered, it is equivalent to half of the amount of 1 sheet of the first monolithic polarizing film. If there are 2 tension rollers, the tension roller is lowered to be equivalent to 1 sheet of the first monolithic polarizing film. 1/4 of the amount.

Even when the gap between slits is constant, the judging section 303 can determine whether the slit S is located at the roller contact portion 361a as described above when the film transport is stopped urgently, and the tension roller 36 is allowed to perform Move upward or downward to control the upstream conveying amount so that the slit S does not stop at the position of the roller contact portion 361a.

That is, in order to shift the stop position of the slitting, it is controlled to slightly reduce the amount of descent of the tension adjustment roller 36 by conveying the upstream thread a little, or it is controlled to slightly reduce the original upstream conveying amount. The amount of descent of the tension adjustment roller 36 is slightly increased.

In the so-called skip cut method in which the position of the slit is changed in consideration of the defects existing in the first long strip of polarizing film 10, there will be parts where the gap between the slits is narrowed, and the slit will be in contact with the rollers. Part of the situation and not the case. Even in this case, the judging part 303 can still be used to judge from the cutting position data (the position data of the slit) whether the slit is positioned at the roller contact portion at the time when the film transport is stopped, and the tension roller 36 can be adjusted. Move upward or downward to control the upstream conveying amount so that the slit S does not stop at the position of the roller contact portion 361a.

As shown in FIG. 2, when it has been determined that the slit S2 is located at the contact portion 361a when the film transport is stopped, the upstream conveying amount of the tension roller 36 will be reduced, and the tension roller 36 will be moved from The downward movement of the first position P1 corresponds to the distance L1 to the second position P2. Its knot As a result, the slit S2 stops on the upstream side (the first cutting portion 40 side) in the conveying direction.

The tension adjustment roller 236 of the fourth path length changing portion B2 shown in FIG. 1B is controlled in the same manner as the tension adjustment roller 36 described above. In addition, in order to perform drive control of the tension adjustment roller 236, it also has the same configuration as the roller drive unit 301, the roller drive control unit 302, and the judgment unit 303 described above.

(Embodiment 2)

Hereinafter, other embodiments will be described with reference to FIGS. 4A and 4B. Since the same symbols as in FIGS. 1A and 1B have the same configuration as described above, the description will be omitted or simply described.

In the second embodiment, the cut width of the first and second monolithic polarizing films of the first and second long release films, that is, the so-called slit S is formed at a constant interval.

When the slit interval (D2) used in the next production has been changed from the slit interval (D1≠D2) used in the previous production, the second path length changing part B1 is adjusted The arrangement of the tension roller and the adjustment tension roller of the fourth path length changing portion B2 moves upstream in the film conveying direction formed by plane projection so that the slit does not stop at the roller contact portion. Furthermore, as another embodiment, it may be moved to the downstream side.

During production, the second path length changing part B1 can also be fixed on a track not shown in the figure, and it has wheels that can move on the track along the film conveying direction during the transfer configuration, or it can have wheels that are not on the track. The top is the composition of wheels rolling on the floor.

In FIGS. 4A and 4B, although the second and fourth path length changing portions B1 and B2 are configured with a single tension adjusting roller, respectively, they are not limited to this, and may be configured with a plurality of tension rollers (for example, the first 1. The third path length changing part A1, A2).

(Embodiment 3)

In the first embodiment described above, in the case where the cut width of the first and second monolithic polarizing films from which the first and second long release films are removed, that is, the so-called slit S is formed at a certain interval, the next time When the slit interval (D2) used in the production has been changed from the slit interval (D1≠D2) used in the previous production, the tension adjustment roller of the second path length changing part B1 can also be used The arrangement of the tension adjustment roller with the fourth path length changing portion B2 moves toward the upstream or downstream side in the film transport direction of the plane projection so that the slit does not stop at the roller contact portion.

Although it is not usually the case that the slit is located at the roller contact part due to the stop of the film transport, when the film transport has stopped urgently, the judging unit still determines whether the slit is located at the roller contact part, and Adjust the tension roller control to move up or down, so that the slit does not stop at the position where the roller touches the part.

(Continuous manufacturing method of liquid crystal display panel)

The continuous manufacturing method of a liquid crystal display panel includes a manufacturing step. The foregoing manufacturing step is to attach a first optical film having at least an optically functional film (such as a polarizing film) to the first surface of the optical unit, and will at least have an optically functional film ( For example, the second optical film of the polarizing film is attached to the optical unit The second side of the element is used to manufacture the liquid crystal display panel.

The manufacturing step includes: a moving step of setting the release film to the inner side to set the long optical film within a predetermined angle (θ) and moving in a predetermined direction (upward or downward); judging step, It is judged whether the slit is stopped at the part of the conveying direction change roller (roller contact part) when the conveyance of the long optical film has been stopped, and the moving step is based on the aforementioned judgment. As a result of the judgment of the step, the conveying direction changing roller is moved in the predetermined direction (upward or downward) so that when the conveying is actually stopped, the slit does not stop on the set of the conveying direction changing roller. Part (roller contact part).

In addition, it may further include the following step: in the case where the slits of the long optical film are formed at a certain interval, the interval of the slits of the long optical film used in the next production ( D2) When the slit interval (D1≠D2) used in the previous production has been changed, the arrangement of the rollers for changing the conveying direction is projected along the plane of the long optical film. The direction is moved toward the upstream side or the downstream side and arranged so that when the conveyance of the long optical film has been stopped, the slit does not stop at the portion (roller contact portion) installed on the roller.

(Other embodiments)

In this embodiment, the first monolithic polarizing film 111 is attached from the underside of the liquid crystal cell 5, and then the first monolithic polarizing film is attached. The liquid crystal cell 5 of the film 111 is turned over (the front and the back are turned over and rotated 90° as needed), and the second monolithic polarizing film 211 is attached from the underside of the liquid crystal cell 5. However, the first monolithic polarizing film may be attached from the upper side of the liquid crystal cell 5, and the liquid crystal cell 5 may be inverted, and then a second monolithic polarizing film may be attached to the upper side of the liquid crystal cell 5. The first monolithic polarizing film is attached to the upper side of the liquid crystal cell without turning over the liquid crystal cell, and the second monolithic polarizing film is attached from the lower side of the liquid crystal cell, and the second monolithic polarizing film can also be attached from the lower side of the liquid crystal cell. A monolithic polarizing film, without turning over the liquid crystal cell, and attaching a second monolithic polarizing film from the upper side of the liquid crystal cell. In addition, the first monolithic polarizing film and the second monolithic polarizing film may be attached simultaneously from the upper and lower sides of the liquid crystal cell.

In addition, although this embodiment exemplifies a configuration in which the optical film is attached to both sides of the optical unit in the so-called "roll-to-face method", it is not limited to this, and the "sheet-to-face method" may be used. To attach the optical film to both sides of the optical unit, you can also attach the optical film on one side of the optical unit in a "roll-to-side method" and attach the optical film to the other side in a "sheet-to-side method".

In addition, in the present embodiment, although an optical film roll is used, the configuration of the roll-shaped optical film is not limited to this, and a so-called "slit-containing optical film roll" may also be used.

In addition, in the present embodiment, although the long polarizing film sent from the optical film roll is cut at predetermined intervals, the present invention is not particularly limited to this structure. For example, it is also possible to perform defect inspection on the long polarizing film sent from the optical film roll, and cut it according to the inspection result. Break (so-called jump cut) to avoid defects. In addition, it is also possible to read the defect information attached to the long polarizing film or the mark attached to the defect position in advance, and cut off based on the defect information or mark to avoid the defect.

In addition, in this embodiment, although the elongated polarizing film has an absorption axis parallel to the longitudinal direction, the direction of the absorption axis of the elongated polarizing film is not limited to this. For example, the first long polarizing film has an absorption axis parallel to its short side direction (width direction), and the second long polarizing film has an absorption axis parallel to its long side direction. In this case, the winding mechanism for horizontally rotating the liquid crystal cell attached with the first monolithic polarizing film by 90° can be appropriately omitted.

In addition, in this embodiment, although a liquid crystal cell is illustrated as an optical unit, it is not limited to this, and the optical unit may be an organic EL cell.

The organic EL cell has a structure in which an electroluminescent layer is sandwiched between a pair of electrodes. The organic EL unit can use any type of unit such as a top emission (Top Emission) method, a bottom emission (Bottom Emission) method, a double emission (Double Emission) method, and the like. The organic EL display panel is a panel in which a polarizing film is attached to one side or both sides of the organic EL unit, and a driving circuit can be integrated according to needs.

5: LCD unit

5a: First side (1st substrate)

5b: Second side (2nd substrate)

10: The first long optical film laminate

11: The first long strip of polarizing film

12: The first long release film

31: The first tension roller

32: The second tension roller

34, 35, 36, 38, 39: guide roller

36: Adjust the tension roller

40: The first cutting part

40a: The first adsorption part

50: The first peeling part

61: The first winding part

80: The first attachment part

81: The first sticking roller

82: The first drive roller

100: Continuous manufacturing device

110: The first release film conveying device

111: The first monolithic polarizing film

120: Panel transport device

A1: The first path length change part

B1: The second path length change part

R1: The first optical film roll

S: slit

x: route

Claims (7)

A conveying device for conveying a long optical film. The long optical film has slits in the direction orthogonal to the longitudinal direction, that is, in the width direction. The long optical film has at least an optically functional film and a gap therebetween. The adhesive layer is a release film laminated with the optical function film, and slits are formed on the optical film from which the release film is removed. The transport device has: a single transport direction changing roller to set the release film The long optical film is set to the inside to set the long optical film within a predetermined angle range and move in a predetermined direction; the roller drive unit moves the transport direction changing roller to the predetermined direction; the judging unit judges the transport of the long optical film When it has stopped, whether the slitting will stop at the part of the long optical film that is installed on the conveying direction changing roller; and the roller drive control unit, which controls the roller drive unit based on the judgment result of the judgment unit, and The conveying direction changing roller is moved in the predetermined direction so that when the conveying is actually stopped, the slit does not stop at the portion where the conveying direction changing roller is erected. For example, the conveying device of claim 1, wherein the judging unit judges whether the slitting will stop at the erection of the long optical film in the case of receiving a stop signal for stopping conveying from a predetermined device. The part of the wheel that changes the direction. The conveying device of claim 1 or 2, wherein the slits are formed at a certain interval in the longitudinal direction of the elongated optical film, or formed to include a plurality of different intervals. The conveying device of claim 1 or 2, wherein in the case where the slits of the long optical film are formed at a certain interval, the interval of the slits of the long optical film used in the next production In the case where the gap between slits used in the previous production has been changed, the arrangement of the transfer direction change roller is arranged along the plane projection of the long optical film toward the upstream or downstream side. It is moved and arranged so that when the conveyance of the long optical film has been stopped, the slit does not stop at the portion installed on the roller. A conveying device is a conveying device for a long optical film. The long optical film has slits in a direction orthogonal to the longitudinal direction, that is, in the width direction. The long optical film has at least an optically functional film, and A release film laminated with the optical function film via an adhesive layer, and the optical film from which the release film is removed is formed with slits at regular intervals, and the conveying device has the release film to be arranged inside. Set the aforementioned long optical film within a predetermined angle range on one or more conveying direction change rollers. The interval between the aforementioned slits of the long optical film used in the next production is changed from the previous production site. If the interval of the slits used has been changed, the arrangement of the rollers for changing the conveying direction should be directed upstream or downstream along the conveying direction of the long optical film projected on the plane. The side movement is arranged so that when the conveyance of the elongated optical film has been stopped, the slit does not stop at the portion of the elongated optical film where the conveying direction changing roller is installed. A continuous manufacturing system for an optical display panel, comprising: a manufacturing device for bonding a first optical film having at least an optical function film to the first surface of an optical unit, and bonding a second optical film having at least an optical function film to the first surface of the optical unit The second surface of the optical unit is used to manufacture the optical display panel; and the conveying device as claimed in claim 1, 2 or 5. For example, the continuous manufacturing system for optical display panels of claim 6, wherein the aforementioned manufacturing device is: one side sends out the first long optical film from the first optical film roll, and the other side leaves the long first release film, and A single-piece-shaped first optical film obtained by cutting the first long optical film is attached to the first surface of the transported optical unit, or a single-piece-shaped first optical film is attached to the optical unit The first side of the unit; and/or the second long optical film is sent out from the second optical film roll on one side, and the second long release film is left on one side, and the aforementioned second long optical film will be cut off. The obtained single-piece second optical film is attached to the first optical unit of the transported optical unit so that the optical axis of the first optical film and the optical axis of the second optical film are arranged at a predetermined angle. Two-sided, or a single-piece second optical film is arranged so that the optical axis of the first optical film and the optical axis of the second optical film become a predetermined angle To attach to the second surface of the optical unit.

Images