JP2019135186A - Scored long optical film carrier and optical display panel continuous manufacturing system - Google Patents

Abstract

To provide a carrier that, in the case of conveying an optical film on which a score is formed by a carrier having a roll, can prevent an occurrence of turning-up of the optical film at the score in a state stretched over the roll during a stoppage of conveyance.SOLUTION: A carrier has a single conveyance-direction change roller by which a long optical film is moved with a release film positioned inside in a predetermined direction while being stretched in a predetermined angular range, a roller driver that moves the conveyance-direction change roller in a predetermined direction, a determining section 303 that determines whether or not a score stops at a portion of the long optical film stretched over the conveyance-direction change roller when the long optical film is stopped from being conveyed, and a roller-drive control section 302 that controls a roller driver 301 to move the conveyance-direction change roller in a predetermined direction based on a determination result such that the score does not stop at the portion stretched over the conveyance-direction change roller when there is an actual stop from conveyance.SELECTED DRAWING: Figure 1A

Description

  The present invention relates to a transport device that transports a long optical film having a cut, and a continuous manufacturing method and a continuous manufacturing system of an optical display panel.

  In a multilayer film having a multilayer structure, for example, a so-called half-cut technique is known in which the multilayer film is cut without cutting the outermost separator. In this half-cut, when the cut portion (cut) is placed outside (clamped) with a roller, it is called “turning up” of the laminated film from the cut (or peeling of the cut end and lifting of the cut end). May occur). This “turn-up” is noticeably generated when the cut line of the laminated film is at a position held by the roller when the conveying line of the laminated film is stopped.

  Patent Document 1 discloses an anti-peeling device that can prevent “turning” that occurs when the optical film is being transported, particularly when the transport direction is changed by 90 ° or more.

JP 2009-186996 A

  In the case of the peeling preventing apparatus shown in FIG. 7 of Patent Document 1, since there is a gap between the pressing member and the optical film, there is a concern that when the film conveyance is stopped, the optical film is turned over and contacts the suppressing member. . If transport is resumed with the optical film turned up and in contact with the restraining member, the optical film will be turned up against the pressing member, and the subsequent optical member will also be turned up. Furthermore, the optical film turned over in the gap is clogged, and the optical film cannot be transported.

  In the case of the peeling prevention apparatus shown in FIG. 8 of Patent Document 1, the optical film is conveyed while being sandwiched by a plurality of small-diameter rollers, but when the cut stops in the gap between the small-diameter rollers, There is concern about turning over. If the optical film is turned over and the conveyance is started as it is, the turning further proceeds in contact with the small diameter roller.

  In the case of the peeling prevention device shown in FIG. 9 of Patent Document 1, since the optical film is sandwiched between the surfaces by the annular sheet, the turning as in the configuration of FIGS. 7 and 8 does not occur, but it becomes a complicated device. . Further, even when the film transport line is not stopped, the annular sheet is always in contact with the optical film on the surface, and there is a possibility that the optical film is rubbed with the annular sheet.

  In the case of the peeling prevention device shown in FIG. 10 of Patent Document 1, since the optical film can be sandwiched between the surfaces in a physically non-contact manner by blowing air, the problem of turning as shown in FIGS. Although such a rubbing problem does not occur, it becomes a complicated apparatus. Moreover, there is a possibility that the air flow in the manufacturing apparatus is disturbed by blowing air and the foreign matter is stirred.

Accordingly, an object of the present invention is to turn an optical film from a cut that is stretched over a roll when the conveyance is stopped when the optical film on which the cut is formed is conveyed by a conveyance device having a roll. It is providing the conveying apparatus which can prevent this.
Another object is to provide an optical display panel continuous manufacturing system capable of continuously producing an optical display panel without turning up from the cut of the optical film when the conveyance is stopped.

  As a result of intensive studies in order to solve the above problems, the present invention has been completed.

The present invention is a transport device for transporting a long optical film having a cut (S) in the width direction which is a direction orthogonal to the longitudinal direction,
The long optical film has at least an optical functional film and a release film laminated via the optical functional film and an adhesive layer, and a cut is formed in the optical film excluding the release film. And
A single transport direction changing roller that moves in a predetermined direction while the long optical film is spanned in a predetermined angle (θ) range with the release film inside;
A roller driving section for moving the transport direction changing roller in a predetermined direction;
When the transport of the long optical film is stopped, it is determined whether or not the cut stops at a portion (roller contact portion) spanned by the transport direction changing roller of the long optical film. A determination unit;
Based on the determination result of the determination unit, when the conveyance is actually stopped, the conveyance direction change roller is configured so that the cut does not stop at a portion (roller contact portion) spanned by the conveyance direction change roller. A roller drive control unit that controls the roller drive unit so as to move it in the predetermined direction.

The “predetermined angle range” is a range of an angle θ (see FIG. 3) formed by the upstream optical film and the downstream optical film with the transport direction changing roller as the center, and is greater than 0 ° and 180 °. It may be the following. When θ is 0 °, the upstream optical film and the downstream optical film are aligned, and when θ is 180 °, the transport direction of the upstream optical film and the transport direction of the downstream optical film are parallel to each other. It means to be reversed. Depending on the arrangement of the guide rollers, the angle θ may exceed 180 °. The angle θ corresponds to a change range of the conveyance direction.
The “predetermined direction” may be, for example, an upward direction or a downward direction, or a horizontal direction along the upstream side or the downstream side in the transport direction.

  The determination unit of the present invention spans the transport direction changing roller of the long optical film when the transport is actually stopped when a stop signal for stopping the transport is received from a predetermined device. It may be judged (predicted) whether or not the cut stops at the portion that is made (roller contact portion).

  The cuts of the invention may be formed at regular intervals in the longitudinal direction of the long optical film. Moreover, the said cut | interruption may be formed so that a several different space | interval may be included in the longitudinal direction of the said elongate optical film.

  In the above invention, the change range of the transport direction is exemplified by a range greater than 0 ° and not greater than 180 °.

The single transfer direction changing roller of the present invention may be a dancer roller configured to move vertically or horizontally with respect to the transfer device. The single conveyance direction change roller may be configured to rotate around an axis orthogonal to the conveyance direction.
The dancer roller may constitute a path length changing unit that changes the path length, which is the length of the transport path of the long optical film. The path length changing unit may be an accumulator.

In the above invention, the amount of movement in the upward or downward direction of the dancer roller is set to a constant value in advance because the cuts are at regular intervals.
For example, if the upstream line is stopped while applying one optical film to the optical cell, if there is one dancer roller, the dancer roller will be lifted by half the film, and there will be two dancer rollers. The dancer roller can be controlled to be raised by a quarter of one film.

In addition, even when the cuts are not at regular intervals as in the so-called skip cut method, it is determined whether or not the cut stops at the roller contact portion, and the judgment result that the cut stops In addition, a single conveyance direction changing roller (dancer roller) is moved by a predetermined amount from a predetermined value set in a predetermined direction (upward or downward) (or moved by a predetermined amount so as not to reach the predetermined value). It is possible to control so that the cut does not stop at the roller contact portion.
In addition, even when the conveyance stops unexpectedly, such as in an emergency, a single conveyance direction change roller (dancer roller) is preset in a predetermined direction (upward or downward) when the cut stops at the roller contact portion. By moving a predetermined amount from the specified value (or not moving the specified amount from the specified value), it is possible to control so that the cut does not stop at the roller contact portion.

In the above invention, when the cuts of the long optical film are formed at regular intervals, the cut interval (D2) of the long optical film used for the next production is used for the previous production. When the distance between the cuts is changed (D1 ≠ D2), when the transport of the long optical film is stopped, the cuts are stopped at the part (roller contact part) spanned by the rollers. In order to avoid this, the arrangement of the conveyance direction changing roller may be arranged by moving to the upstream side or the downstream side along the conveyance direction in which the long optical film is projected onto the plane.
“Planar projection” is obtained by projecting a long optical film onto a plane such as a floor on which the apparatus is installed. “Movement to the upstream side or downstream side along the conveyance direction projected on a plane” means movement in one direction parallel to the conveyance direction, not including the vertical and horizontal directions.

Here, when the gap (D2) of the long optical film used for the next production is changed from the gap (D1 ≠ D2) of the cut used for the previous production,
In the half cut that forms cuts at constant intervals, when the cutting interval of the half cut of the optical film roll used for the next production is changed from the cutting interval of the half cut of the optical film roll used for the previous production, Or
In a cut optical film roll wound with a long optical film in which cuts of a predetermined interval are formed in advance, the fixed intervals of the cut optical film roll used for the next production are used for the previous production. The configuration may include a case where the optical film roll with a cut used is changed from a fixed interval of cuts.
Thereby, when it is known in advance that the cut is stopped in the transport direction change roller due to the specification change of the long optical film, the transport direction change roller is changed by changing the position of the transport direction change roller with respect to the transport direction. The frequency of moving up and down can be reduced. This is particularly effective when the cuts are formed at regular intervals, but in principle, the cuts are formed at regular intervals, and in rare cases it is also effective when the intervals are small or large.

  According to the said invention, when a conveyance stop is carried out, a single conveyance direction change roller moves, a cut | interruption does not stop at a conveyance direction change roller, and the generation | occurrence | production of an optical film can be prevented suitably.

The transport device of another invention is a transport device that transports a long optical film having a cut in the width direction that is a direction orthogonal to the longitudinal direction,
The long optical film has at least an optical functional film and a release film laminated via the optical functional film and an adhesive layer, and the optical film excluding the release film has cuts at regular intervals. Formed,
One or one or more transport direction changing rollers on which the long optical film is bridged in a predetermined angle range with the release film inside, and
When the gap (D2) of the long optical film used in the next production is changed from the gap (D1 ≠ D2) used in the previous production, the long optical film The conveyance direction change roller is arranged so that the cut does not stop at a portion (roller contact portion) spanned by the conveyance direction change roller of the long optical film when the conveyance of The long optical film is arranged to be moved upstream or downstream along the plane-projected conveyance direction.
“Planar projection” is obtained by projecting a long optical film onto a plane such as a floor on which the apparatus is installed. “Movement to the upstream side or downstream side along the conveyance direction projected on a plane” means movement in one direction parallel to the conveyance direction, not including the vertical and horizontal directions.

  The “predetermined angle range” is a range of an angle θ (see FIG. 3) formed by the upstream optical film and the downstream optical film with the transport direction changing roller as the center, and is greater than 0 ° and 180 °. It may be the following. When θ is 0 °, the upstream optical film and the downstream optical film are aligned, and when θ is 180 °, the transport direction of the upstream optical film and the transport direction of the downstream optical film are parallel to each other. It means to be reversed. Depending on the arrangement of the guide rollers, the angle θ may exceed 180 °. The angle θ corresponds to a change range of the conveyance direction.

Here, when the gap (D2) of the long optical film used for the next production is changed from the gap (D1 ≠ D2) of the cut used for the previous production,
In the half cut that forms cuts at constant intervals, when the cutting interval of the half cut of the optical film roll used for the next production is changed from the cutting interval of the half cut of the optical film roll used for the previous production, Or
In a cut optical film roll wound with a long optical film in which cuts of a predetermined interval are formed in advance, the fixed intervals of the cut optical film roll used for the next production are used for the previous production. When it changes from the fixed space | interval of the cut of the used optical film roll containing a cut, the structure containing may be sufficient.

  According to the above invention, when it is known in advance that the cut is stopped at the transport direction changing roller due to the change in the specification of the long optical film in which the cuts at constant intervals are formed, the position of the transport direction changing roller is changed. By changing with respect to the conveyance direction of the long optical film projected onto the plane, the cut is not stopped at the conveyance direction changing roller, and the occurrence of turning of the optical film can be suitably prevented.

In another continuous display system for an optical display panel according to another invention, a first optical film having at least an optical functional film is bonded to a first surface of an optical cell, and a second optical film having at least an optical functional film is attached to the first optical film. A manufacturing apparatus for manufacturing an optical display panel by bonding to two surfaces;
And a transfer device.

In the above invention, the manufacturing apparatus comprises:
A sheet-like first optical film obtained by cutting the first long optical film leaving the long first release film while feeding the first long optical film from the first optical film roll is conveyed. Affixing to the first surface of the optical cell, or a sheet-like first optical film is affixed to the first surface of the optical cell,
And / or a sheet-like second optical film obtained by cutting the second long optical film while leaving the long second release film while paying out the second long optical film from the second optical film roll, The optical axis of the first optical film and the optical axis of the second optical film are affixed to the second surface of the optical cell being conveyed so that the optical axis of the second optical film is arranged at a predetermined angle, or a sheet-like second The structure which affixes an optical film on said 2nd surface of the said optical cell so that the optical axis of said 1st optical film and the optical axis of said 2nd optical film may become predetermined angle arrangement | positioning may be sufficient.

  According to the said invention, an optical display panel can be continuously produced, without producing a turn from the cut of an optical film at the time of conveyance stop.

In the present invention, the “optical film roll” is formed in a roll shape by laminating a long release film and a long optical film (adhesive layer, optical functional film and surface protective film) in this order. Yes.
“Roll-to-panel method” is a method of cutting a release film and a long optical film drawn out from an optical film roll into a width direction while leaving the release film and cutting an adhesive layer, an optical functional film and a surface protection film ( This is a method in which a long release film is peeled off from a sheet-like optical film obtained by cutting and cutting, and the sheet-like optical film is bonded to an optical cell via an exposed adhesive layer.

On the other hand, there is a “sheet-to-panel method” as an optical film bonding method different from the roll-to-panel method. "Sheet-to-panel system" is a sheet-fed optical film that has been in a single-wafer state in advance through a pressure-sensitive adhesive layer that is exposed by peeling a single-wafer release film or a long release film. This is a method of bonding to an optical cell.
The “cut optical film roll” is a roll-shaped film in which a sheet-like optical film (adhesive layer, optical functional film and surface protective film) is laminated in the longitudinal direction on a long release film. It is a role.

Schematic which showed an example of the continuous manufacturing system of the optical display panel of Embodiment 1. FIG. Schematic which showed an example of the continuous manufacturing system of the optical display panel of Embodiment 1. FIG. The figure which shows the state of a movement of a dancer roller. Diagram for explaining angle θ Schematic which showed an example of the continuous manufacturing system of the optical display panel of Embodiment 2. FIG. Schematic which showed an example of the continuous manufacturing system of the optical display panel of Embodiment 2. FIG.

(Embodiment 1)
Hereinafter, the continuous manufacturing system and the continuous manufacturing method of the optical display panel will be described more specifically with reference to FIGS. 1A, 1B, and 2, but the present invention is not limited to the mode of the present embodiment.
The optical display panel will be described as a liquid crystal display panel, the optical cell as a liquid crystal cell, and the optical film as a polarizing film.

  The liquid crystal display panel continuous manufacturing system of this embodiment includes a continuous manufacturing apparatus 100. The continuous production apparatus 100 is a first sheet 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 leaf-shaped polarizing film 111 is attached to the first surface 5 a of the liquid crystal cell 5. Moreover, the continuous manufacturing apparatus 100 is obtained by cutting 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. The second sheet-like polarizing film 211 is attached to the second surface 5b of the liquid crystal cell 5 so that the absorption axis of the first sheet-like polarizing film 111 and the absorption axis of the second sheet-like polarizing film 211 are orthogonal to each other. A liquid crystal display panel Y is manufactured.

  In the continuous manufacturing system of the liquid crystal display panel, the continuous manufacturing apparatus 100 is arranged in a series of panel transport devices 120 that transport the liquid crystal cell 5 and the liquid crystal display panel Y. The line of the panel conveying device 120 is drawn in a straight line with x, but 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 continuous web having a release film and a long polarizing film including an adhesive layer formed on the release film. What wound the elongate optical film laminated body in roll shape is mentioned. In this case, the continuous manufacturing system of the liquid crystal display panel uses a long polarizing film (including an adhesive layer) leaving a release film in order to form a sheet-like polarizing film (sheet piece) from the long polarizing film. A cutting device that cuts (half-cuts) (forms a cut) in a direction perpendicular to the feeding direction of the release film at a predetermined interval.
Moreover, as an optical film roll, for example, (2) A sheet-like polarizing film (including a pressure-sensitive adhesive layer) adjacent to each other via a cut in a direction perpendicular to the feeding direction of the release film on the release film and the release film. ) And a long optical film laminate having a roll shape (so-called cut polarizing film roll).

The first optical film roll R1 shown in FIG. 1A has a first long release film 12 and an absorption parallel to the feed direction (longitudinal direction) formed on the first long release film 12 via an adhesive layer. A first long optical film laminate 10 having a first long polarizing film 11 (including its pressure-sensitive adhesive layer) 11 having a shaft is wound in a roll shape.
The second optical film roll R2 shown in FIG. 1B has a second long release film 22 and an absorption parallel to the feed direction (longitudinal direction) formed on the second long release film 22 via an adhesive layer. A second long optical film laminate 20 having a second long polarizing film 21 (including the pressure-sensitive adhesive layer) 21 having a shaft is wound in a roll shape.

The first and second long polarizing films 11 and 21 are, for example, a polarizer (thickness is about 5 to 80 μm) and a polarizer protective film (thickness is generally 1 to 500 μm on one or both sides of the polarizer). Degree) is formed with or without adhesive.
Examples of other films constituting the first and second long polarizing films 11 and 21 include a retardation film (thickness is generally 10 to 200 μm), a viewing angle compensation film, a brightness enhancement film, a surface protection film, and the like. Can be mentioned. As for the thickness of the 1st, 2nd elongate polarizing films 11 and 21, the range of 10 micrometers-500 micrometers is mentioned, for example.

  The adhesive which comprises the adhesive layer of the 1st, 2nd elongate polarizing films 11 and 21 is not restrict | limited in particular, For example, an acrylic adhesive, a silicone adhesive, a urethane adhesive, etc. are mentioned. The thickness of the pressure-sensitive adhesive layer is preferably in the range of 10 to 50 μm, for example. As the first and second release films 12 and 22, a conventionally known film such as a plastic film (for example, a polyethylene terephthalate film, a polyolefin film, etc.) can be used. Moreover, you may use the appropriate thing according to the past, such as what coat-coated with appropriate release agents, such as a silicone type, a long-chain alkyl type, a fluorine type, and molybdenum sulfide as needed.

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

(Continuous manufacturing equipment)
The continuous manufacturing apparatus 100 includes a first release film transport device 110, a first sticking unit 80, a second release film transport device 210, and a second sticking unit 280.

As shown to FIG. 1A, the 1st release film conveyance apparatus 110 is 1st elongate release film 12 and 1st elongate polarizing film 11 (1st elongate optical film laminated body 10) from 1st optical film roll R1. ) Is fed to the first pasting unit 80.
In the present embodiment, the first release film transport device 110 includes a first path length changing unit A1, a first cutting unit 40, a second path length changing unit B1, a first peeling unit 50, and a first winding unit 61. Have.

  The first path length changing unit A1 includes a plurality of conveyance direction changing rollers. The plurality of transport direction changing rollers are guide rollers (upstream and downstream rollers) on which the first long polarizing film 11 (first long optical film laminate 10) is bridged with the first long release film 12 on the outside. The first long polarizing film 10 (first long optical film laminate 10) with the first and second dancer rollers 31 and 32 movable up and down, and the first long release film 12 inside. 1), 2nd and 3rd guide rollers (not shown).

The 1st cutting part 40 is fixing the 1st elongate optical film laminated body 10 from the 1st elongate release film 12 side by the 1st adsorption | suction part 40a, and leaving the 1st elongate release film 12 left. The first long polarizing film (including the pressure-sensitive adhesive layer) 11 is cut in the width direction, and the first sheet-like polarizing film 111 is formed on the first long release film 12.
Examples of the first cutting unit 40 include a cutter and a laser device. The first suction part 40a may be, for example, a suction plate having a large number of holes connected to a vacuum pump and capable of sucking negative pressure of air from the holes.

  The second path length changing unit B1 has a single conveyance direction changing roller. The conveyance direction changing roller is composed of an adjustment dancer roller 36 that is movable up and down and on which the first long polarizing film 11 (first long optical film laminate 10) is bridged with the first long release film 12 inside. Is done. The second path length changing unit B1 may have a guide roller. A specific control method of the adjustment dancer roller 36 will be described later.

The first release film transport device 110 may include a pair of guide rollers 34 and 35 between the first cutting unit 40 and the second path length changing unit B1. Either one or both of the pair of guide rollers 34 and 35 may be a driving roller.
Moreover, the 1st release film conveyance apparatus 110 may have the guide rollers 38 and 39 between the 2nd path length change part B1 and the 1st peeling part 50. FIG.
In the present embodiment, a roller on which the first long polarizing film 11 (first long optical film laminate 10) is bridged with the first long release film 12 on the inner side downstream from the first cutting portion 40 is as follows. Only the adjustment dancer roller 36 is used, but the present invention is not limited to this.
In the present embodiment, all of the guide rollers on the downstream side of the second path length changing portion B1 have the first long release film 12 on the outside and the first long polarizing film 11 (first long optical film laminate 10). ) Is a roller.

The 1st peeling part 50 peels back the 1st elongate release film 12 inside by the front-end | tip part, and peels the 1st sheet-like polarizing film 111 from the 1st elongate release film 12. FIG. The peeled first sheet-like polarizing film 111 is supplied to the first pasting unit 80.
In the present embodiment, as the first peeling portion 50, a sharp knife edge portion is used at the tip portion, but it is not limited to this.

  The first winding unit 61 winds up the first long release film 12 from which the first sheet-like polarizing film 111 has been peeled off. The first winding unit 61 may be configured with an automatic rotating roller.

The 1st sticking part 80 is the 1st sheet | seat from which the 1st elongate release film 12 was peeled by the 1st peeling part 50 from the one side (1st surface 5a) of the liquid crystal cell 5 conveyed by the panel conveying apparatus 120. The leaf-shaped polarizing film 111 is attached via an adhesive layer.
In the present embodiment, the first pasting unit 80 includes a first pasting roller 81 and a first drive roller 82.

As shown in FIG. 1B, the various components and apparatuses described above are used as various apparatuses for attaching the second sheet-like polarizing film 211 to the other surface (second surface 5b) of the liquid crystal cell 5. it can.
The second release film transport device 210 applies the second sticking while feeding the second long release film 22 and the second long polarizing film 21 (second long optical film laminate 20) from the second optical film roll R2. To the unit 280.
In the present embodiment, the second release film transport device 210 includes a third path length changing unit A2, a second cutting unit 240, a fourth path length changing unit B2, a second peeling unit 250, and a second winding unit 261. Have.
The second release film transport device 210 can be configured by the same device as the first release film transport device 110, and the second pasting portion 280 can be configured by the same device as the first pasting portion 80.
For example, the third road length changing unit A2 can be configured by the same device as the first road length changing unit A1.
The 2nd cutting part 240 and the 2nd adsorption | suction part 240a can be comprised with the apparatus similar to the 1st cutting part 40 and the 2nd adsorption | suction part 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 unit 261 can be configured by the same device as the first winding unit 61.
The second sticking roller 281 and the second driving roller 282 can be configured by the same mechanism as the first sticking roller 81 and the first driving roller 82.

  The fourth path length changing unit B2 has a single conveyance direction changing roller. The transport direction changing roller is composed of an adjustment dancer roller 236 that is movable up and down and on which the second long polarizing film 21 (second long optical film laminate 20) is bridged with the second long release film 22 inside. Is done. The fourth path length changing unit B2 may have a guide roller.

The second release film transport apparatus 210 may have a pair of guide rollers 234 and 235 between the second cutting unit 240 and the fourth path length changing unit B2. Either one or both of the pair of guide rollers 234 and 235 may be drive rollers.
Moreover, the 2nd release film conveying apparatus 210 may have the guide rollers 238 and 239 between 4th path length change part B2 and the 2nd peeling part 250. FIG.
In the present embodiment, the roller on which the second long polarizing film 21 (second long optical film laminate 20) is bridged with the second long release film 22 on the inside downstream of the second cutting portion 240 is Only the adjustment dancer roller 236 is used, but the present invention is not limited to this.
In the present embodiment, all of the guide rollers on the downstream side of the fourth path length changing portion B2 have the second long polarizing film 21 (second long optical film laminate 20) with the second long release film 22 facing outside. ) Is a roller.

  The panel transport device 120 is a series of transport devices that transport the liquid crystal display panel Y in which the liquid crystal cell 5 and the first and second sheet-like polarizing films 111 and 211 are attached to both surfaces of the liquid crystal cell 5. The panel transport device 120 includes, for example, a transport roller and a suction plate. In the present embodiment, the panel transport device 120 has a turning mechanism for horizontally rotating the liquid crystal cell 5 to which the first sheet-like polarizing film 111 is attached by 90 ° and the liquid crystal to which the first sheet-like polarizing film 111 is attached. A reversing mechanism is provided that flips the cell 5 upside down.

(Control method of adjusting dancer roller)
The roller driving unit 301 moves the adjustment dancer roller 36 in a predetermined direction (upward or downward in this embodiment). Examples of the roller drive unit 301 include a linear actuator such as an air cylinder, a hydraulic cylinder, and an electric cylinder, but are not limited thereto.
Moreover, you may use the structure which always applies upward tension | tensile_strength by pulling up the adjustment dancer roller 36 with a weight through a guide. It is possible to maintain a state in which tension is constantly applied to the long polarizing film by the weight, and the adjustment dancer roller can be moved up and down according to the film feed amount before and after the adjustment dancer roller.

  When the conveyance of the first long polarizing film 11 (the first long optical film laminate 10) is stopped, the determination unit 303 is a portion that spans the adjustment dancer roller 36 of the first long polarizing film 11 ( It is determined whether or not the cut S stops at the roller contact portion 361a).

  Based on the determination result of the determination unit 303, the roller drive control unit 302 prevents the cut S from stopping at a portion (roller contact portion 361 a) spanned over the adjustment dancer roller 36 when the conveyance is actually stopped. The roller driving unit 301 is controlled so as to move the adjustment dancer roller 36 in a predetermined direction (upward or downward in this embodiment).

For example, the determination unit 303 may determine whether the cut S is positioned at the roller contact portion 361a based on the position data of the cut S acquired in advance.
The position data of the cut S may be obtained from the cut position data when the first long polarizing film 11 is cut in the width direction, and the cut position captured by the imaging unit after the cut S is formed is specified. It may be obtained from image data to be obtained, or may be obtained from detection data obtained by detecting a cut position with an optical sensor.
In addition, if it is an optical film roll which does not have the 1st cutting part 40 and wound the 1st elongate polarizing film with a cut into roll shape, the storage medium (Local PC or You may acquire from each memory of a server, a radio | wireless tag, etc.) or code data (QR code (trademark), barcode, etc.).
Further, when the conveyance of the first long optical film laminate 10 is stopped, the determination unit 303 analyzes at least the image data obtained by imaging the roller contact portion 361a by the imaging unit, and the cut S is located at the roller contact portion 361a. It may be determined whether or not.
Examples of stopping the conveyance of the first long optical film laminate 10 include, for example, a conveyance stop by an operator's operation, and a conveyance stop when the first sheet-fed polarizing film 111 is applied to the liquid crystal cell 5 by the first application unit 80. An example is a conveyance stop at the end of the work.

When the interval between the cuts is constant, the lengths in the transport direction of the first sheet-like polarizing film 111 are all the same in the pasting process by the first pasting unit 80, so whether the cut S is positioned at the roller contact portion 361a. No is known in advance. For example, when the upstream conveyance line is stopped while the first sheet-like polarizing film is applied to the liquid crystal cell 5, if there is one adjusting dancer roller 36, one sheet-like polarizing film is provided. The adjustment dancer roller 36 is lowered by half, and when there are two adjustment dancer rollers, control is performed so that the adjustment dancer roller is lowered by ¼ of one sheet-fed polarizing film.
Even when the interval between the cuts is constant, when the film conveyance is urgently stopped, the determination unit 303 determines whether the cut S is positioned on the roller contact portion 361a as described above, and the cut S is the roller contact portion 361a. The adjustment dancer roller 36 is moved up or down so as not to stop at this position, or the upstream conveyance amount is controlled.
That is, in order to shift the stop position of the cut line, the adjustment line is controlled so that the lowering amount of the adjustment dancer roller 36 is slightly reduced by transporting the upstream line a little, or the upstream conveyance amount is reduced in the first place. Control the amount of descent to increase slightly.

  In the so-called skip cut method in which the position of the cut is changed in consideration of the disadvantages existing in the first long polarizing film 10, there is a portion where the interval between the cuts is narrow, and the case where the cut is located at the roller contact portion is not so. Cases arise. Even in this case, the determination unit 303 determines from the cutting position data (cut position data) whether or not the cut is positioned at the roller contact portion at the timing of stopping the film conveyance, and the cut S is the position of the roller contact portion 361a. The adjustment dancer roller 36 is moved up or down so that it does not stop at, and the upstream conveyance amount is controlled.

  As shown in FIG. 2, when it is determined that the cut S2 is located at the contact portion 361a when the film conveyance is stopped, the upstream conveyance amount of the adjustment dancer roller 36 is reduced, and the adjustment dancer roller 36 is moved from the first position P1 by that amount. Move down to the second position P2 by a distance L1. As a result, the cut line S2 stops on the upstream side in the transport direction (the first cutting unit 40 side).

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

(Embodiment 2)
Hereinafter, another embodiment will be described with reference to FIGS. 4A and 4B. The same reference numerals as those in FIGS. 1A and 1B have the same configuration as described above, and therefore the description thereof will be omitted or briefly described.
In Embodiment 2, the cut widths of the first and second sheet-like polarizing films excluding the first and second long release films, so-called cuts S, are formed at regular intervals.
When the gap (D2) used for the next production is changed from the gap used for the previous production (D1 ≠ D2), the second gap is set so that the cut does not stop at the roller contact portion. The arrangement of the adjustment dancer roller of the path length changing unit B1 and the adjustment dancer roller of the fourth path length changing unit B2 is moved upstream along the film conveyance direction projected on the plane. In addition, you may move to a downstream side as another embodiment.

  At the time of production, the second path length changing unit B1 is fixed on a rail (not shown), and when changing the arrangement, the second path length changing unit B1 may have a wheel that can move on the rail along the film conveyance direction. Instead, it may be configured to have wheels that roll on the floor.

  4A and 4B, the second and fourth path length changing sections B1 and B2 are each configured to have a single adjustment dancer roller, but are not limited thereto, and are configured to have a plurality of dancer rollers (for example, first and second It may be a three-way length changing unit A1, A2).

(Embodiment 3)
In the first embodiment, when the cut widths of the first and second sheet-like polarizing films excluding the first and second long release films, so-called cuts S, are formed at regular intervals, they are used for the next production. When the gap (D2) between the cuts is changed from the gap (D1 ≠ D2) used in the previous production, the second path length changing unit B1 is set so that the cut does not stop at the roller contact portion. The arrangement of the adjustment dancer roller and the adjustment dancer roller of the fourth path length changing unit B2 may be moved upstream or downstream along the plane-projected film conveyance direction.
Normally, the cut is not positioned at the roller contact portion due to the film transport stop, but when the film transport is stopped urgently, the determination unit passes to determine whether the roller contact portion is positioned, The adjustment dancer roller is controlled to move up or down so that the cut does not stop at the position of the roller contact portion.

(Continuous manufacturing method for liquid crystal display panels)
A continuous production method of a liquid crystal display panel includes a second optical device in which a first optical film having at least an optical functional film (for example, a polarizing film) is bonded to a first surface of an optical cell, and at least an optical functional film (for example, a polarizing film) is provided. It includes a manufacturing process for manufacturing a liquid crystal display panel by bonding a film to the second surface of the optical cell.
The manufacturing process is
Moving the single transport direction changing roller in a predetermined direction (upward or downward) while the long optical film is stretched over a predetermined angle (θ) range with the release film facing inside;
Judgment whether or not the cut stops at a portion (roller contact portion) spanned by the transport direction changing roller of the long optical film when the transport of the long optical film is stopped Process,
Based on the determination result of the determination step, the conveyance direction change roller is configured so that the cut is not stopped at a portion (roller contact portion) spanned by the conveyance direction change roller when conveyance is actually stopped. Moving in the predetermined direction (upward or downward).

  In addition, when the cuts of the long optical film are formed at regular intervals, the gap (D2) of the cuts of the long optical film used for the next production was used for the previous production. When the gap is changed from the gap (D1 ≠ D2), when the conveyance of the long optical film is stopped, the cut does not stop at a portion (roller contact portion) spanned by the roller. In addition, it may further include a step of disposing the transport direction changing roller by moving it upstream or downstream along the transport direction of the long optical film projected on a plane.

(Another embodiment)
In this embodiment, the 1st sheet-like polarizing film 111 is affixed from the lower side of the liquid crystal cell 5, and then the liquid crystal cell 5 to which the 1st sheet-like polarizing film 111 is affixed is reversed (front and back inversion, as necessary. The second sheet-like polarizing film 211 is attached from the lower side of the liquid crystal cell 5. However, the first sheet-like polarizing film may be attached from the upper side of the liquid crystal cell 5, the liquid crystal cell 5 may be inverted, and the second sheet-like polarizing film may be attached from the upper side of the liquid crystal cell 5. The first sheet-like polarizing film may be attached from the lower side of the liquid crystal cell, or the first sheet-like polarizing film may be attached from the lower side of the liquid crystal cell without attaching the first sheet-like polarizing film. In addition, the second sheet-like polarizing film may be attached from the upper side of the liquid crystal cell without inverting the liquid crystal cell. Moreover, you may affix a 1st sheet-like polarizing film and a 2nd sheet-like polarizing film simultaneously from the upper side and lower side of a liquid crystal cell.

  Further, in the present embodiment, the configuration in which the optical film is attached to both surfaces of the optical cell by the so-called “roll-to-panel method” is exemplified, but the present invention is not limited to this, and the optical cell is “sheet-to-panel method”. The optical cell may be affixed on both sides of the optical cell, and the optical film may be affixed on the one side of the optical cell by the “roll-to-panel method” and the other side by the “sheet-to-panel method”.

  Moreover, although the optical film roll was used in this embodiment, the structure of a roll-shaped optical film is not limited to this, You may use what is called a "cut optical film roll."

  Moreover, in this embodiment, although the elongate polarizing film drawn | fed out from the optical film roll was cut | disconnected by a predetermined space | interval, this invention is not restrict | limited especially to this structure. For example, the long polarizing film fed out from the optical film roll may be inspected for defects and cut (so-called skip cut) so as to avoid the defects based on the inspection results. Moreover, the defect information previously attached | subjected to the elongate polarizing film or the mark attached | subjected to the defect position may be read, and it may cut | disconnect so that a defect may be avoided based on the said defect information or mark.

  Moreover, in this embodiment, although a long polarizing film has an absorption axis parallel to a longitudinal direction, the absorption axis direction of a long polarizing film is not limited to this. For example, the first long polarizing film may have an absorption axis parallel to the short direction (width direction), and the second long polarizing film may have an absorption axis parallel to the longitudinal direction. In this case, the turning mechanism for horizontally rotating the liquid crystal cell to which the first sheet-like polarizing film is attached by 90 ° can be omitted as appropriate.

In the present embodiment, a liquid crystal cell is illustrated as an optical cell, but the present invention is not limited to this, and the optical cell may be an organic EL cell.
The organic EL cell has a configuration in which an electroluminescent layer is sandwiched between a pair of electrodes. As the organic EL cell, for example, an arbitrary type such as a top emission method, a bottom emission method, a double emission method, or the like can be used. The organic EL display panel has a polarizing film bonded to one or both sides of an organic EL cell, and a drive circuit is incorporated as necessary.

36 Adjustment dancer roller 361a Roller contact portion 301 Roller drive unit 302 Roller drive control unit 303 Judgment unit

Claims (7)

A transport device for transporting a long optical film having a cut in the width direction which is a direction orthogonal to the longitudinal direction,
The long optical film has at least an optical functional film and a release film laminated via the optical functional film and an adhesive layer, and a cut is formed in the optical film excluding the release film. And
A single transport direction change roller that moves in a predetermined direction while the long optical film is spanned in a predetermined angle range with the release film facing inside;
A roller driving section for moving the transport direction changing roller in a predetermined direction;
When the conveyance of the long optical film is stopped, a determination unit that determines whether or not the cut stops on a portion of the long optical film that is stretched over the conveyance direction change roller; and
Based on the determination result of the determination unit, when the conveyance is actually stopped, the conveyance direction change roller is moved in the predetermined direction so that the cut does not stop at a portion spanned by the conveyance direction change roller. A roller drive control unit for controlling the roller drive unit to move;
A conveying device. The determination unit
When receiving a stop signal for stopping conveyance from a predetermined device, it is determined whether or not the cut stops at a portion of the long optical film that is stretched over the conveyance direction change roller. The transport apparatus according to claim 1.   The conveying device according to claim 1 or 2, wherein the cuts are formed at regular intervals in the longitudinal direction of the long optical film, or are formed so as to include a plurality of different intervals.   When the cuts of the long optical film are formed at regular intervals, the cut intervals of the long optical film used for the next production are changed from the cut intervals used for the previous production. When the transport of the long optical film is stopped, the transport direction changing roller is arranged so that the cut does not stop at the portion spanned by the roller. The transport apparatus according to any one of claims 1 to 3, wherein the transport apparatus is arranged to be moved upstream or downstream along a transport direction of the optical film projected onto a plane. A transport device for transporting a long optical film having a cut in the width direction which is a direction orthogonal to the longitudinal direction,
The long optical film has at least an optical functional film and a release film laminated via the optical functional film and an adhesive layer, and the optical film excluding the release film has cuts at regular intervals. Formed,
One or one or more transport direction changing rollers on which the long optical film is bridged in a predetermined angle range with the release film inside, and
When the interval of the cut of the long optical film used for the next production is changed from the interval of the cut used for the previous production, when the conveyance of the long optical film is stopped, In order to prevent the cut from stopping at the portion of the long optical film spanned by the transport direction changing roller, the transport direction of the long optical film is projected onto the plane. The transfer device is arranged to be moved upstream or downstream along the line. Manufacturing an optical display panel by bonding a first optical film having at least an optical functional film to the first surface of an optical cell and bonding a second optical film having at least an optical functional film to the second surface of the optical cell Equipment,
The continuous manufacturing system of an optical display panel provided with the conveying apparatus as described in any one of the said Claims 1-5. The manufacturing apparatus includes:
A sheet-like first optical film obtained by cutting the first long optical film leaving the long first release film while feeding the first long optical film from the first optical film roll is conveyed. Affixing to the first surface of the optical cell, or a sheet-like first optical film is affixed to the first surface of the optical cell,
And / or a sheet-like second optical film obtained by cutting the second long optical film while leaving the long second release film while paying out the second long optical film from the second optical film roll, The optical axis of the first optical film and the optical axis of the second optical film are affixed to the second surface of the optical cell being conveyed so that the optical axis of the second optical film is arranged at a predetermined angle, or a sheet-like second The optical display according to claim 6, wherein an optical film is attached to the second surface of the optical cell so that an optical axis of the first optical film and an optical axis of the second optical film are arranged at a predetermined angle. Panel continuous manufacturing system.

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