TWI671174B - Cutting line forming method and cutting line forming device - Google Patents

Abstract

Provided is a method and a device for forming a cutting line, which can always start the cutting with the same position of a circular cutter against the side end portion of the optical film laminate when forming each of a plurality of cutting lines.

This method includes: a process of rotating a circular cutter; a predetermined position on the outer periphery of the circular cutter against a side end portion of the optical film laminate, and a process of cutting the optical film laminate; starting a circular cutter The process of forming a cutting line in the optical film layer while moving toward the width direction of the optical film layer; transporting the optical film layer in a predetermined distance to serve as a cutting line and the next cutting line The distance between works.

Description

Cutting line forming method and cutting line forming device

The present invention relates to a method and a device for forming a cutting line on an optical film laminate, and more particularly, to a method and a device for forming a cutting line, which can be controlled so that a plurality of cutting lines are formed. Among each of them, at the same distance from the lateral end portion of the optical film layered body in the width direction, the depth of the cutting line becomes the same depth.

In recent years, as display devices such as television receivers, optical display devices such as a liquid crystal display device or an organic EL display device in which an optical film is bonded to a glass substrate have been marketed. In the manufacture of optical display devices, individual attaching methods have been used in the past, that is, a large number of optical film films cut in advance from the mesh optical film in addition to the manufacturing process of the optical display device are brought into the The manufacturing process of the optical display device is then sequentially laminated with the rectangular panel member brought in separately during the manufacturing process.

Regarding such an individual attachment method, a method has been proposed in which, in the manufacturing process of an optical display device, a plurality of optical elements are continuously supported only through an adhesive layer on an elongated mesh-shaped release film through an adhesive layer. Among the film sheets, the normal film sheet having no defects is sequentially peeled from the release film together with the adhesive layer, and is bonded to the panel member via the adhesive layer, thereby continuously manufacturing an optical display device. The manufacturing system for realizing this method is described in Patent Document 1, for example.

The manufacturing system described in Patent Document 1 uses a roll of an optical film laminate in which a long optical film and a long release film are laminated with an adhesive layer interposed therebetween. For optical film laminates that are unwinded from a roll, at positions determined based on the results of defect inspections performed in advance, the width direction orthogonal to the longitudinal direction of the optical film laminates is continuously embedded. The cutting line is formed between two cutting lines adjacent to each other in the longitudinal direction to generate a plurality of optical films that are continuously supported by a long release film. The film of the optical film is sent to a bonding position while being supported by a long release film, and is peeled off from the release film and then bonded to a panel member. This type of optical display device manufacturing system is called "continuous attach (RTP; Roll To Panel) in order to distinguish it from the above-mentioned individual bonding system for bonding an optical film film cut in advance to a panel member. )"system.

In the RTP system, a cutting line formation method is used to continuously form a cutting line for the optical film laminate. The cutting line is formed by cutting the optical film and the adhesive layer from the side opposite to the side where the release film is laminated, leaving only the release film. As a means for forming such a cutting line in an optical film laminate, generally, a circular cutter or a laser is used.

Regarding the formation of the cutting line, Patent Document 2 proposes a cutting method, which aims to cut the optical film without causing an appearance defect, and When the film of the optical film is continuously attached to the panel member, the optical film is not broken. In this technique, the above-mentioned purpose is achieved by controlling the depth of forming the cutting line.

However, when a cutting line is formed using a circular cutter, there is a problem that cannot be solved by controlling the depth of the cutting line as described below.

First of all, when abrasion or defect of the cutting edge of a circular cutter occurs, cutting failure due to these reasons may occur in the optical film. When an optical film is bonded to a substrate where a defective cutting occurs, problems such as mixing of air bubbles and contamination caused by an adhesive are often caused. Therefore, it is necessary to find the defective as soon as possible and identify the cause. However, if the cutting failure occurs irregularly on the optical film, it is difficult to find the cutting failure and identify the cause.

In addition, in order to improve the accuracy of the formation position of the cutting line, the following work may be performed, that is, the position of the cutting line is detected by an optical camera or the like at the side end portion of the optical film layered body, and based on a reference set in advance The amount of deviation between the lines is used to correct the formation position of the next cutting line (for example, Patent Document 3). When using this correction technique, the tool tip may vibrate due to, for example, distortion of the tool or poor assembly of the tool to the device. Depending on the amount of the vibration, it may form a field of view that is out of the optical camera and cannot be understood. Of cutting lines. If such a problem occurs, it is difficult to improve the accuracy of the formation position of the cutting line.

In addition, if the blade sharply vibrates, a variety of optical film films having different lengths on the side end portions extending in the conveying direction, or a variety of optical film films having side end portions extending in the width direction may be formed. sheet. However, if a plurality of optical film diaphragms each having a different shape are continuously bonded to It is difficult for the panel member to stably achieve the high bonding accuracy required especially in recent optical display devices.

[Prior technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 4377964

[Patent Document 2] Japanese Patent Application Laid-Open No. 2011-065174

[Patent Document 3] Japanese Patent Laid-Open No. 2013-240841

An object of the present invention is to provide a method and a device for forming a cutting line, which can always start the same position of a circular cutter against the side end portion of an optical film laminate when forming each of a plurality of cutting lines. Cutting.

According to one aspect of the present invention, the present invention provides a method for continuously forming a plurality of cutting lines on an optical film laminate including a release film from the side opposite to the side where the release film is laminated. This method includes: a process of rotating a circular cutter; a predetermined position on the outer periphery of the circular cutter against a side end portion of the optical film laminate, and a process of cutting the optical film laminate; starting a circular cutter A process of forming a cutting line in the optical film laminate while moving toward the width direction of the optical film laminate; The process of carrying a distance set in advance as a distance between one cutting line and the next cutting line.

In one embodiment, the method preferably includes, before the process of rotating the circular cutter, the process of setting the circular cutter to a reference state, the reference state is used to enable the optical cutter to be laminated when the circular cutter starts. When the body is cut, the predetermined position always abuts the side end portion of the optical film laminate.

Here, the reference state of the circular cutter refers to a determined posture of the circular cutter such that at any point on the circumference of the circular cutter, the circular cutter is rotated in order to form each of a plurality of cutting lines. Before, it was always in the same position in the circumferential direction. The circular cutter in the standby position before starting to rotate is always returned to the reference state, so that when each of a plurality of cutting lines is formed, the predetermined position on the circumference of the circular cutter can always be against the optical film. The laminated body F is, for example, a right end FR. When each of the plurality of cutting lines is formed, the predetermined position against the right end FR may be the same as any point on the circumference, or may be different.

In one embodiment, the method can be designed to further include: rotating a circular cutter that has been set as a reference state, and stopping the rotation of the circular cutter after forming a cutting line, and obtaining a value from the reference state until the rotation is stopped. The number of rotations of a circular tool, the process of calculating the deviation angle between the reference state of the circular tool and the state when the rotation is stopped by the number of rotations, and the process of setting the circular tool as the reference state, including the deviation angle of the rotation of the circular tool . In another embodiment, the method can be designed to further include: rotating a circular cutter that has been set as a reference state, and stopping the rotation of the circular cutter after forming a cutting line, and determining from the reference state to the rotation stop Round The process of the number of rotations of the tool, the process of setting the circular tool as a reference state, includes the number of rotations of the circular tool in reverse rotation.

In still another embodiment, a circular cutter provided with a mark can be used. In this embodiment, the process of setting the circular cutter to a reference state can be designed to include reading the position of the marker when the circular cutter has stopped rotating after forming the cutting line and memorizing it as the current position, and using the current position The deviation angle between the reference state of the circular cutter and the state when the rotation stops after the cutting line is formed is calculated from the previously memorized position of the mark when the circular cutter is in the reference state, and the circular cutter is rotated by the deviation angle. Or, it can be designed as a project that sets the circular cutter as the reference state, including reading the mark while rotating the circular cutter, and determining whether the mark is memorized in advance when the circular cutter is in the reference state. Location is consistent.

In still another embodiment, a circular cutter capable of stopping rotation in a reference state by actuation of a lock mechanism can be used. In this embodiment, the process of setting the circular cutter to the reference state can include designing a locking mechanism to operate, rotating the circular cutter, and stopping the rotary cutter in the reference state by the locking mechanism.

In one embodiment, the process of rotating the circular cutter can be designed to include the process of rotating the circular cutter after the formation of one cutting line is completed in the direction opposite to the direction of rotation when forming one cutting line. The cutting line process includes a process in which a circular cutter is moved in a direction opposite to that when forming one cutting line, and the next cutting line is formed in the optical film laminate. In this embodiment, a plurality of cutting lines The two side end portions of the film laminate are formed. In another embodiment, the method can be designed to further include moving the circular cutter after forming one cutting line in a state opposite to the direction when forming one cutting line without contacting the optical film laminate. The process of rotating the circular cutter includes the process of rotating the circular cutter in the same direction as the direction of rotation when forming a cutting line. The process of forming the cutting line includes the process of making the circular cutter facing and forming. One cutting line moves in the same direction, and the next cutting line is formed in the optical film laminate. In this embodiment, a plurality of cutting lines are formed from only one side end portion of the optical film laminate.

In one embodiment, it is preferable that the process of starting cutting includes a process of starting cutting after the rotation speed of the circular cutter reaches a predetermined speed when the cutting line is formed.

According to another aspect of the present invention, the present invention provides a device for forming a cutting line on an optical film laminate including a release film from the side opposite to the side where the release film is laminated. This device includes a cutting unit having a circular cutter for cutting the optical film laminate, and a first driving unit for rotating the circular cutter; and a cutting unit moving mechanism having the cutting unit facing the optical film. A second drive unit that moves in the width direction of the laminated body; a control unit that controls the operations of the first drive unit and the second drive unit. The control unit controls the operations of the first driving unit and the second driving unit such that a predetermined position on the outer periphery of the rotating circular cutter abuts the side end portion of the optical film laminate.

According to the present invention, in each of the plurality of cutting lines, The position where the distance from the side of the optical film layered body in the same direction is the same as the cutting line is formed by the same place of the circular cutter, so if a cutting line that does not match the shape of the same cutting line appears, it can be easily done. It is found that the cutting failure of the optical film and the cause are identified, and the frequency of such problems as breakage of the release film or poor adhesion of the optical film to the liquid crystal display panel can be reduced. In addition, since the position on the circumference of the circular cutter which abuts the side end portion of the optical film laminate can be set to the same position each time it is cut, even if the circular cutter itself is twisted or the cutter is assembled to the device In the case of failure, the cutting start position can still be adjusted so that the cutting line always falls into the field of view of an optical camera or the like, which can further improve the accuracy of the position where the cutting line is formed. In addition, for each of the plurality of optical film films, a film having the same length and shape of the end portions facing each other can be obtained, so that the bonding accuracy of the optical film film to the panel member can be more stably improved.

F‧‧‧Optical film laminate

FR‧‧‧ one side end (right end)

FL‧‧‧ the other side end (left end)

F1‧‧‧ Optical Film

F2‧‧‧Adhesive layer

F3‧‧‧ release film

CL1, CL2‧‧‧‧cut line

FS1, FS2, FS3‧‧‧Optical film diaphragm

L‧‧‧ Distance between cutting lines

1,1 ’, 1” ‧‧‧‧cut line forming device

10‧‧‧ Cut-off unit

12‧‧‧ round cutter

14‧‧‧ height adjustment department

16‧‧‧Circular Tool Assembly Department

18‧‧‧ 1st drive unit

19‧‧‧The first detection department

20‧‧‧ cutting unit moving mechanism

22‧‧‧rail

24‧‧‧ Ball screw mechanism

26‧‧‧ 2nd drive unit

28‧‧‧Second Detection Section

30a, 30b‧‧‧ support

32‧‧‧Reading Department

34‧‧‧lighting

35‧‧‧pin

36‧‧‧ Offset means

37‧‧‧Driver

40‧‧‧cut-off platform

50‧‧‧Control Department

52‧‧‧Memory Department

[Fig. 1] A perspective view of a model of an optical film laminate in which a cutting line is formed by the cutting line forming method and device of the present invention.

Fig. 2 is a schematic side view showing a schematic configuration of a cutting line forming apparatus according to a first embodiment of the present invention.

[FIG. 3] A schematic plan view of a configuration of a cutting line forming apparatus according to a first embodiment of the present invention.

[Fig. 4] A control flow of a cutting line forming operation in the cutting line forming apparatus according to the first embodiment of the present invention.

[Fig. 5] A diagram showing the relationship between the rotation speed of a circular cutter and the elapsed time from the start of rotation.

[Fig. 6] Another control flow of the cutting line forming operation in the cutting line forming apparatus according to the first embodiment of the present invention.

[FIG. 7] A schematic plan view of the configuration of a cutting line forming apparatus according to a second embodiment of the present invention.

[Fig. 8] A control flow of a cutting line forming operation in a cutting line forming apparatus according to a second embodiment of the present invention.

[Fig. 9] Another control flow of the cutting line forming operation in the cutting line forming apparatus according to the second embodiment of the present invention.

[Fig. 10] Another control flow of the cutting line forming operation in the cutting line forming apparatus according to the second embodiment of the present invention.

[FIG. 11] A schematic plan view of a configuration of a cutting line forming apparatus according to a third embodiment of the present invention.

[Fig. 12] A control flow of a cutting line forming operation in a cutting line forming apparatus according to a third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to these embodiments.

FIG. 1 is a schematic perspective view of a model of an optical film laminate F in which a cutting line is formed by the cutting line forming method and device of the present invention. As shown in FIG. 1, the cutting line forming method and device of the present invention are used for optically forming an optical film F1 having a long release film F3 laminated with an adhesive layer F2 interposed therebetween. The film laminate F forms a plurality of cutting lines CL1, CL2, CL3,... So as to be able to be used for dividing a plurality of optical films FS1, FS2, which are continuously supported on the release film F3 in the longitudinal direction. FS3 .... If the cutting line forming method and device of the present invention are used, for example, at the cutting line CL1, when the cutting depth varies from the right end FR of the optical film laminate F by a distance a1, a2, or a3, In other cutting lines CL2, CL3, etc., the cutting depth can also be varied in the same position. This can be achieved by, when forming each of the cutting lines CL1, CL2, CL3, ..., the predetermined position of the circular cutter is always pressed against the right end of the optical film laminate F The FR starts dicing of the optical film laminate.

In the RTP system, when a cutting line forming device using the cutting line forming method of the present invention is used, for example, as disclosed in the specification or drawings of Patent Document 1, it is possible to set a loading length before the cutting line forming device. Type optical film layered body roll support device, unwinding device for continuously unwinding the optical film layered body from the roll, speed adjustment device for adjusting the feeding speed of the film and the like. The optical film laminates that have passed these devices will be sent to the cutting line forming device. Next, the optical film layered body is sent out from the cutting line forming apparatus to a post process. In the post-process of the cutting line forming device, a speed adjustment device capable of adjusting the feed speed of the film, an exclusion device for excluding the defective optical film from the long release film, and an optical film without the defect can be provided. The sheet is peeled from the long release film and attached to a panel member, a laminating device for winding a long release film, and the like.

[First Embodiment]

FIG. 2 is a schematic side view showing a schematic configuration of a cutting line forming device 1 according to a first embodiment of the present invention, and FIG. 3 is a schematic top view showing a schematic configuration of a cutting line forming device 1. In this embodiment, the number of rotations of the circular cutter 12 is read by a detection unit such as an encoder, and the circular cutter 12 is set to a reference state according to the read result. The cutting line forming device 1 includes a cutting unit 10 that cuts the optical film laminate F, and a cutting unit that reciprocates the cutting unit 10 in the width direction (cut line formation direction) of the optical film laminate F. Moving mechanism 20. The cutting line forming apparatus 1 further includes a cutting base 40 on which the optical film layered body F is placed.

The cutting unit 10 includes a circular cutter 12, a height adjustment unit 14 that adjusts the position of the circular cutter 12 with respect to the height direction of the optical film laminate F, and a first driving unit 18 that rotates the circular cutter 12. The circular cutter 12 is attached to the circular cutter mounting portion 16, and the depth of the cutting line can be arbitrarily set by raising and lowering the height adjustment portion 14. The first driving section 18 can be provided, for example, in the circular cutter mounting section 16. As the first driving unit 18, a driving device capable of precisely controlling the number of rotations of the circular cutter 12 is preferably used, and a servo motor is typically used. The cutting line forming apparatus 1 typically includes a control unit 50 that can be configured by a general-purpose computer device such as a personal computer. The control unit 50 can cause the first drive unit 18 and the height adjustment unit 14 to operate by a control signal.

The cutting unit 10 includes a first detection unit 19. The first detection unit 19 can detect the state of the first drive unit 18, such as information such as the number of rotations and the rotation speed, and send it to the control unit 50. First detection unit 19, example If it can be ordered as an encoder, it is provided on the rotation axis of the circular cutter 12. In this case, the number of rotations of the circular cutter 12 can be detected and sent to the control unit 50. The control unit 50 can control the operation of the first drive unit 18 based on the feedback information from the first detection unit 19. Accordingly, the rotation speed and the rotation number of the circular cutter 12 can be freely controlled by the control unit 50. For example, the control unit 50 can freely control the rotation speed when the circular cutter 12 forms a cutting line, the time from the stopped state to the rotation speed, the number of rotations during which the cutting unit 10 moves a certain distance, and the like.

The cutting unit 10 can be moved in the cutting line formation direction (that is, the width direction of the optical film laminate F) by the cutting unit moving mechanism 20. The cutting unit moving mechanism 20 includes a guide rail 22 and a ball screw mechanism 24 for the cutting unit 10 to travel, and is installed between one pair of support portions 30a and 30b standing upright on one of the two outer sides of the cutting base 40 in the width direction. . The cutting unit 10 is mounted on the cutting unit moving mechanism 20 and can reciprocate along the guide rail 22 in the width direction of the optical film layered body F by the driving force of the second driving portion 26 that operates the ball screw mechanism 24. . The second driving unit 26 is operated by a control signal received from the control unit 50. As the second driving unit 26, a control device capable of precisely controlling the moving speed of the cutting unit 10 is preferably used, and a servo motor is typically used.

The cutting unit moving mechanism 20 includes a second detection unit 28. The second detection unit 28 can detect the state of the second drive unit 26, such as information such as the number of rotations and the rotation speed, and send it to the control unit 50. The second detection unit 28 can be, for example, an encoder and is provided on a rotation shaft that rotates the shaft of the ball screw mechanism 24. In this case, the ball screw mechanism can be detected The number of rotations of the shaft is sent to the control unit 50. The control unit 50 can control the operation of the second driving unit 26 based on the feedback information from the second detection unit 28. Accordingly, the moving speed of the cutting unit 10 can be freely controlled by the control unit 50.

Next, a cutting line forming method of the cutting line forming apparatus 1 according to the first embodiment will be described. FIG. 4 discloses the cutting line forming method 100. In the first embodiment, a configuration is adopted in which the number of rotations of the circular cutter 12 can be detected by, for example, the first detection unit 19 that is an encoder provided in the cutting unit 10. With this structure, in the method 100, the number of rotations, that is, the number of rotations of the circular cutter 12 from the reference state to the stop of rotation after the cutting line is formed, that is, the number of rotations, is used to obtain the circle between the reference state and the stop of rotation The deviation angle θ of the reference point on the circumference of the shape cutter 12, when forming each of a plurality of cutting lines, by adjusting the posture of the circle cutter 12 by the amount of the deviation angle θ, the circle cutter can always be The predetermined position of 12 abuts the side end portion of the optical film layered body F. The reference state of a circular cutter refers to a determined posture of the circular cutter such that an arbitrary reference point on the circumference of the circular cutter before the circular cutter is rotated in order to form each of a plurality of cutting lines , Always in the same position in the circumferential direction. The position of the reference point on the circumference is not limited to a specific position, and can be set to an arbitrary position. For example, it can be set to the lowest point on the circumference of the stopped circular cutter 12. When forming each of the plurality of cutting lines CL1, CL2, CL3,..., The predetermined position of the circular cutter 12 against the right end FR of the optical film laminate F may be the same as the reference point on the circumference, Can also be different.

The method 100 can be composed of two engineering groups. First job Cheng Qun, a plurality of projects S101 ~ S112, is used to find the circular cutter 12 in the reference state before forming a plurality of cutting lines CL1, CL2, CL3 ... successively using a new circular cutter 12. The deviation angle θ between the reference point on the circumference of the circle and the reference point when the rotation stops after the cutting line is formed. The second project group is a plurality of projects S113 to S123. Whenever each of the plurality of cutting lines CL1, CL2, CL3, ... is formed, the deviation angle obtained by the first project group S101 to S112 is used. The amount of θ is used to adjust the rotation of the circular cutter 12, that is, one side is adjusted so that the reference point is always located at the same position before each of the cutting lines CL1, CL2, CL3 ..., and the cutting lines CL1, CL2 are continuously formed on the side. CL3 ...

First, the cutting unit 10 is placed at a standby position and set to a reference state of the circular cutter 12 (S101). The stand-by position of the cutting unit 10 is the position of the cutting unit 10 before the formation of the cutting line, and can be set to one end of the cutting base 40 (the right end of the cutting base 40 in FIG. 3). And one of the support portions 30a. The reference state can be set, for example, to a state where the reference point on the circumference of the circular cutter 12 is located at the bottom. The memory unit 52 is related to the control unit 50, and the output value from the first detection unit 19 when the circular cutter 12 is in the reference state is stored in the memory unit 52 as the reference rotation number (S102).

Next, the control unit 50 instructs the first driving unit 18 to start the cutting line of the optical film laminate F (S103), and in response to the instruction, the first driving unit 18 starts the rotation of the circular cutter 12 (S104). The instruction from the control section 50 to start forming the cutting line will also be sent to the second driving section 26, and the second driving section 26 will start simultaneously with the rotation of the circular cutter 12, or Immediately after the rotation is started, the lateral movement of the cutting unit 10 is started (S104). The instruction from the control section 50 to start forming the cutting line is also sent to the height adjusting section 14, and the circular cutter 12 is lowered to a position where the depth of the cutting line becomes an appropriate depth. The circular cutter 12 reaching the right end portion FR of the optical film laminate F starts the formation of a cutting line (S105). At this time, the position on the circumference of the circular cutter 12 that abuts on the right end FR is always in the second engineering group when each of the plurality of cutting lines CL1, CL2, CL3, ... begins to form. Position (predetermined position) of the right end portion FR.

After forming the cutting line of the circular cutter 12 (S106), the control section 50 instructs the first driving section 18, the second driving section 26, and the height adjustment section 14 to stop (S107). In response to this instruction, the rotation of the circular cutter 12 and the lateral movement of the cutting unit 10 are stopped, and the position of the circular cutter 12 is raised (S108). The control unit 50 receives the output value of the first detection unit 19 when the rotation of the circular cutter 12 is stopped, and stores it in the storage unit 52 as the number of rotations when the rotation is stopped (S109). The control unit 50 instructs the second driving unit 26 to move to the standby position of the cutting unit 10 (S110), and the cutting unit 10 moves to the standby state when the circular cutter 12 does not contact the upper surface of the optical film laminate F. Position (S111).

The control unit 50 calculates the number of rotations from the reference state of the circular cutter 12 to the stop time from the reference number of rotations stored in S102 and the number of rotations when stopped in S109 (S112). The control unit 50 further determines the deviation angle θ between the reference point on the circumference of the circular cutter 12 in the reference state and the reference point when the rotation is stopped after the cutting line is formed from the number of rotations.

For example, when the number of rotations from the reference state of the circular cutter 12 to when the rotation is stopped is 100.25 revolutions, the deviation angle θ is 90 °, and when the number of revolutions is 100.60 revolutions, the deviation angle θ is 216 °.

With the above-mentioned first engineering group S101 to S112, each time a plurality of cutting lines CL1, CL2, CL3, ... are formed in the optical film laminate F, the circular cutter 12 is returned to the reference state. Necessary rotation angle. The cutting line forming device 1 then repeats the second engineering groups S113 to S123, thereby sequentially forming each of a plurality of cutting lines CL1, CL2, CL3, etc. in the optical film laminate F.

The control unit 50 instructs the first driving unit 18 on the amount of deviation angle θ obtained by rotating the circular cutter 12 (S113). By this instruction, the rotation angle of the circular cutter 12 is adjusted, and the reference state is returned (S114). For example, the circular cutter 12 is instructed to rotate so that the reference point on the circumference is always the lowest point. The direction in which the circular cutter 12 is rotated is not particularly limited. For example, when the reference point is set to the reference state when the reference point is at the lowest point, when the circular cutter 12 is stopped at a position where the reference point in the rotation direction exceeds the lowermost point by an angle θ, the circular cutter 12 can be reversely rotated The angle θ is returned to the reference state, and the circular cutter 12 can also be rotated 360 ° -θ to return to the reference state.

The control unit 50 instructs the first driving unit 18 to start forming a cutting line of the optical film laminate F (S115), and in response to the instruction, the first driving unit 18 starts rotation of the circular cutter 12 (S116). The instruction from the control section 50 to start forming the cutting line will also be sent to the second driving section 26, and the second driving section 26 will start at the same time as or immediately after the rotation of the circular cutter 12. As the rotation starts, the lateral movement of the cutting unit 10 is started (S116). The instruction from the control unit 50 to start forming the cutting line is sent to the height adjustment unit 14 and the circular cutter 12 is lowered to a predetermined position. The circular cutter 12 that has reached the right end FR of the optical film laminate F will cause a predetermined position on the circumference of the circular cutter 12 to abut the right end FR of the optical film laminate F and start cutting the line CL1. Formation (S117).

After the circular cutter 12 finishes forming the cutting line CL1 of the optical film laminate F (S118), the control unit 50 instructs the first driving unit 18, the second driving unit 26, and the height adjustment unit 14 to stop (S119). In response to this instruction, the rotation of the circular cutter 12 and the lateral movement of the cutting unit 10 are stopped, and the position of the circular cutter 12 is raised (S120). The control unit 50 instructs the second driving unit 26 to move the cutting unit 10 to the standby position (S121). The cutting unit 10 faces the direction opposite to the direction when the cutting line CL1 is formed, that is, the direction from the left end FL to the right end FR of the optical film laminate F, and the circular cutter 12 does not contact the optical film In the state of the laminated body F, it moves to the standby position (S122). The optical film layered body F where the cutting line CL1 is formed will be transported in the long-side direction in a predetermined distance L, that is, the distance L between the cutting line CL1 and a predetermined formation position of the next cutting line CL2 as the The distance between adjacent cutting lines (S123).

Once the cutting unit 10 is moved to the standby position, the control unit 50 instructs the circular cutter 12 to rotate by the deviation angle θ again (S113). By this instruction, the rotation angle of the circular cutter 12 is adjusted, and the reference state is returned (S114). Then, as when the cutting line CL1 is formed, the control The control unit 50 sends a cutting instruction to the first driving unit 18, the second driving unit 26, and the height adjustment unit 14 (S115), and starts forming a cutting line (S117). At the stand-by position, the circular cutter 12 returns to the reference state. Therefore, if the number of rotations and the lateral movement speed from the stand-by position of the circular cutter 12 to the formation of the cutting line are the same, it will oppose the optical when the cutting line CL1 is formed. The circular blade 12 on the right end FR of the film laminate F has the same position on the circumference of the circular cutter 12, that is, a predetermined position, and it will also abut the right end FR when the cutting line CL2 starts to be formed. Thereafter, S118 to S123 are performed, and a cutting line CL2 is formed on the optical film layered body F. Repeat S113 ~ S123 to form a plurality of cutting lines CL3, CL4 ... in order.

Here, the relationship between the rotation speed of the circular blade 12 and the time point at which the cutting line starts to be formed in the optical film laminate F by the circular blade 12 will be described. This relationship is common to all embodiments described in this specification. FIG. 5 is a schematic diagram showing the relationship between the elapsed time from the start of rotation of the circular cutter 12 in the reference state to the stop of the rotation, and the rotation speed of the circular cutter 12. The rotation speed of the circular cutter 12 becomes faster as time passes, and after a predetermined rotation speed is stably rotated, the rotation speed gradually decreases and stops. The cutting unit 10 having the circular cutter 12 can control the second driving unit 26 to move the cutting unit 10 at a desired speed in the width direction of the optical film laminate F.

For example, if the rotation of the circular cutter 12 and the movement of the cutting unit 10 are controlled so that the time at which the rotation speed of the circular cutter 12 reaches a predetermined speed and stabilizes (for example, position A in FIG. 5), the cutting line starts to be formed. In the case, or if the rotation and cutting of the circular cutter 12 is controlled The movement of the element 10 makes it easy to cut the cutting line at a point in time when the rotation speed of the circular cutter 12 is decelerating (for example, position D in FIG. 5), because the rotation speed of the circular cutter 12 changes, it will be easy. Poor cutting or cracking of the polarizing element occurred. Therefore, it is preferable to control the rotation of the circular cutter 12 and the movement of the cutting unit 10 so that the cutting line starts to be formed at a time point when the rotation of the circular cutter 12 reaches a predetermined speed and is stable (for example, position B in FIG. 5), and The process ends at a time point before the rotation speed is reduced (for example, the C position in FIG. 5).

The relationship between the rotation stabilization of the circular cutter 12 and the start movement of the cutting unit 10 is not particularly limited. For example, while the circular cutter 12 is being moved from the standby position to the position where the cutting line starts to be formed, the rotation speed of the circular cutter 12 can be increased to a predetermined speed and stabilized. Alternatively, after the rotation speed of the circular cutter 12 is increased to a predetermined speed and stabilized at the standby position, the circular cutter 12 may be moved from the standby position to a position where a cutting line is started. Alternatively, after the circular cutter 12 is moved from the standby position to the position where the cutting line starts to be formed, the rotation speed of the circular cutter 12 may be increased to a predetermined speed and stabilized.

Next, another cutting line forming method of the cutting line forming apparatus 1 according to the first embodiment will be described. FIG. 6 discloses the cutting line generating method 200. This method 200 is different from the method 100 shown in FIG. 4 in that only the number of rotations of the circular cutter 12 from the reference state to the rotation of the cutting line after stopping the formation of the cutting line is calculated and stored in advance. In each case, the circular cutter 12 is rotated in reverse by the number of rotations, so that the A predetermined position of the circular cutter 12 abuts a side end portion of the optical film laminate F to form a plurality of cutting lines.

Method 200, like method 100, can be composed of two engineering groups. The first project group is a plurality of projects S201 to S211, which are used to find out from the reference state to the cutting before the formation of the plurality of cutting lines CL1, CL2, CL3, ... using the new circular cutter 12 continuously. The number of rotations of the circular cutter 12 until the rotation is stopped after the line is formed. The second project group is a plurality of projects S213 to S223. Whenever each of the plurality of cutting lines CL1, CL2, CL3, ... is formed, the circular cutter 12 is reversely rotated by the first project group S201 to S201. The rotation number obtained in S211 is used to adjust the rotation angle of the circular cutter 12, and a plurality of cutting lines CL1, CL2, CL3, etc. are continuously formed on one side. In addition, the following description is centered on the different projects in the method 100 and the method 200. The unexplained projects are the same as those in the method 100.

First, the cutting unit 10 is placed in a standby position and set to a reference state of the circular cutter 12 (S201). Next, an instruction to start cutting is sent to the first driving section 18, the second driving section 26, and the height adjusting section 14 (S203). A predetermined position on the circumference of the circular cutter 12 abuts a right end FR of the optical film laminate F to form a cutting line. When the rotation of the circular cutter 12 is stopped (S208), the control unit 50 moves from the first detection unit 19 The number of rotations r from the start of the rotation of the circular cutter 12 to the stop of the rotation is received and stored in the storage unit 52 (S209).

The control unit 50 instructs the first driving unit 18 to rotate the circular cutter 12 in the reverse rotation number r (S213). With this instruction, the circular cutter 12 The rotation angle is adjusted to return to the reference state (S214). Thereafter, a cutting line CL1 is formed in the optical film layered body F by the processes of S215 to S223. The control unit 50 once again instructs the circular cutter 12 returned to the standby position to rotate counterclockwise. In this way, S213 to S223 are repeated, and a plurality of cutting lines CL2, CL3, ... are sequentially formed.

[Second Embodiment]

Next, a cutting line forming apparatus 1 'according to a second embodiment of the present invention will be described. Fig. 7 is a schematic plan view showing a configuration of a cutting line forming apparatus 1 'according to a second embodiment of the present invention, and Fig. 8 shows a cutting line forming method 300 according to the second embodiment. In the present embodiment, for example, a reading section using a camera or the like can read a mark or the like attached to the side surface of the circular cutter 12 and set the circular cutter 12 to a reference state based on the reading result.

The cutting line forming device 1 ′ has a basic configuration similar to that of the cutting line forming device 1 of the first embodiment, but is different in that it has a reading unit that can read the marks attached to the side of the circular cutter 12 at the standby position. 32 和 照明 34. The mark can appropriately use characters, graphics, depressions, protrusions, or identification codes according to the conditions of the device, and the reading unit 32 can appropriately use a camera or a sensor, etc., depending on the type of the mark. In the following description, the form in which the mark attached to the side surface of the circular cutter 12 is read by the camera 32 is demonstrated. The illumination 34 is not particularly limited and can be appropriately selected according to the conditions of the device and the like, but typically, it is preferable to use a ring-shaped illumination that can be easily set and can adjust the viewing angle.

Next, a cutting line forming apparatus according to a second embodiment will be described. 1 'cutting line forming method. FIG. 8 discloses a cutting line forming method 300. This method 300 is a method used when the imaging field of view of the reading section (camera) 34 is a part of the side surface of the circular cutter 12. First, a reference state of the circular cutter 12 when the cutting unit 10 is in the standby position is set (S301). The standby position of the cutting unit 10 is, as in the first embodiment, the position of the cutting unit 10 before the formation of the cutting line is the one end of the cutting base 40 (the cutting base in FIG. 3) 40 right end portion) and one of the support portions 30a. The reference state can be set to a state where a mark attached to the side surface of the circular cutter 12 matches a predetermined position in the imaging field of view of the reading unit 34.

When the cutting unit 10 is in the standby position (S302), the control unit 50 instructs the first driving unit 18 and the reading unit 32 to read the mark attached to the circular cutter 12 (S303). In response to the reading instruction of the mark, the first driving unit 18 rotates the circular cutter 12 (S304), the reading unit 32 captures a part of the side surface of the circular cutter 12, and sends the image to the control unit 50 (S305). The control unit 50 can detect the mark when the mark enters the imaging field of view of the reading unit 32 (S306). When the control unit 50 detects the mark, it instructs the first driving unit 18 to stop rotating the circular cutter 12 (S307), and memorizes the current position of the mark (S309).

Next, the control unit 50 obtains the deviation angle θ between the current position of the marker in the imaging field of view and the reference position set in advance in the imaging field of view, and memorizes the obtained deviation angle θ (S310). The control unit 50 instructs the first driving unit 18 on the deviation angle θ obtained by rotating the circular cutter 12 (S311). As a result, the circular cutter 12 performs a rotation angle Adjust and return to the reference state (S312).

The control unit 50 instructs the first driving unit 18 to start forming the cutting line of the optical film laminate F (S313), and in response to the instruction, the first driving unit 18 starts the rotation of the circular cutter 12 (S314). The instruction from the control unit 50 to start forming the cutting line will also be sent to the second driving unit 26, and the second driving unit 26 will start the rotation of the circular cutter 12 at the same time, or immediately after the rotation starts, so that the cutting unit 10 The horizontal movement of S is started (S314). The instruction from the control unit 50 to start forming the cutting line is sent to the height adjustment unit 14 and the circular cutter 12 is lowered to a predetermined position.

The circular cutter 12 that has reached the right end FR of the optical film laminate F starts the formation of the cutting line CL1 (S315). The position on the circumference of the circular cutter 12 that abuts the right end FR when the cutting line CL1 starts to be formed is the position that always abuts the right end FR when the cutting line CL2, CL3, ... is formed (specified position).

After the circular cutter 12 finishes forming the cutting line CL1 of the optical film laminate F (S316), the control section 50 instructs the first driving section 18, the second driving section 26, and the height adjustment section 14 to stop (S317). In response to this instruction, the rotation of the circular cutter 12 and the lateral movement of the cutting unit 10 are stopped, and the position of the circular cutter 12 is raised (S318). The control unit 50 instructs the second driving unit 26 to move the cutting unit 10 to the standby position (S319). The cutting unit 10 faces the direction opposite to the direction when the cutting line CL1 is formed, that is, the direction from the left end FL to the right end FR of the optical film laminate F, and the circular cutter 12 does not contact the optical film In the state of the laminated body F, move to the standby position (S320) to return to the standby position Set (S302). The optical film layered body F having the cutting lines CL1 formed thereon is transported in the long-side direction by a predetermined distance L as a distance between adjacent cutting lines (S321). Thereafter, S302 to S321 are repeated, and the cutting lines CL2, CL3, ... are sequentially formed.

Next, another cutting line forming method of the cutting line forming apparatus 1 'according to the second embodiment will be described. FIG. 9 discloses the cutting line forming method 400. This method 400 is a method used when the imaging field of view of the reading section 34 covers the entire side surface of the circular cutter 12. In addition, the following description is centered on the project that is different from the method 300. The unexplained project is the same as the method 300.

First, as in the method 300, a reference state of the circular cutter 12 is set (S401). When the cutting unit 10 is located at the standby position (S402), the control unit 50 instructs the reading unit 32 to read the mark attached to the circular cutter 12 (S403). In response to the read instruction of the mark, the reading section 32 captures the entire side surface of the circular cutter 12 and sends the image to the control section 50 (S404). The control unit 50 memorizes the current position of the marker based on the sent image (S405).

Next, the control unit 50 obtains a deviation angle θ between the current position of the marker and a reference position set in advance in the imaging field of view, and memorizes the obtained deviation angle θ (S406). The control unit 50 instructs the first driving unit 18 on the deviation angle θ obtained by rotating the circular cutter 12 (S407). As a result, the rotation angle of the circular cutter 12 is adjusted to return to the reference state (S408). In the next steps S409 to S417, like the steps S313 to S321 in the method 300, a cutting line is formed on the optical film layered body F. CL1. Thereafter, S402 to S417 are repeated, and the cutting lines CL2, CL3, ... are sequentially formed.

Next, another cutting line forming method of the cutting line forming apparatus 1 'according to the second embodiment will be described. FIG. 10 discloses the cutting line forming method 500. This method 500 is a method that can be used when the imaging field of view of the reading section 34 is a part of the side surface of the circular blade 12 or covers the entire area. In the shooting field of view, a reference position with a mark is predetermined. In addition, the following description is centered on the project that is different from the method 300. The unexplained project is the same as the method 300.

First, like the method 300 and the method 400, the reference state of the circular cutter 12 is set (S501). When the cutting unit 10 is located at the standby position (S502), the control unit 50 instructs the first driving unit 18 and the reading unit 32 to read the mark attached to the circular cutter 12 (S503). In response to the read instruction of the mark, the first driving unit 18 rotates the circular cutter 12 (S504), the reading unit 32 captures a part or the entire side of the circular cutter 12, and sends the image to the control unit 50 (S505). The control unit 50 determines whether the position of the mark is consistent with a predetermined position based on the sent image (S506). The process from S504 to S506 will be repeated until the marked position is consistent with the predetermined position. When the position of the mark coincides with a predetermined position, the control section 50 instructs the first driving section 18, the second driving section 26, and the height adjusting section 14 to start forming a cutting line, and the circular cutter 12 starts the optical film laminate F. Form a cutting line. When the position of the mark is consistent with the position set in advance, it can also be designed to temporarily stop the rotation of the circular cutter 12, and the control unit 50 then issues an instruction of S507. Pick up In the following processes S508 to S515, as in the processes S314 to S321 in the method 300, a cutting line CL1 is formed on the optical film layered body F. Thereafter, S502 to S515 are repeated, and the cutting lines CL2, CL3, ... are sequentially formed.

[Third Embodiment]

Next, a cutting line forming device 1 "according to a third embodiment of the present invention will be described. Fig. 11 is a schematic plan view of a configuration of a cutting line forming device 1" according to a third embodiment of the present invention, and Fig. 12 shows a cutting line formation according to the third embodiment. Method 600. In this embodiment, a lock mechanism for mechanically restricting the rotation of the circular cutter 12 is provided in the cutting line forming apparatus 1 ", whereby the circular cutter 12 can be set to a reference state.

The cutting line forming device 1 "has a basic structure similar to that of the cutting line forming device 1 of the first embodiment, but is different in that a locking mechanism for mechanically restricting the rotation of the circular cutter 12 is provided. The locking mechanism is an example. As shown in FIG. 11, the pin 35 can be mounted on the side of the circular cutter 12 so as to protrude in a direction perpendicular to the side of the circular cutter 12; and the offsetting means 36 is provided on the side of the circular cutter 12. The opposing position moves toward the side and engages with the pin 35 during operation, thereby stopping the rotation of the circular cutter 12; and the driving unit 37 such as an air cylinder moves the offsetting means 36; The circular cutter 12 when the circular cutter 12 is stopped by the lock mechanism is a reference state when the cutting unit 12 is in the standby position.

The locking mechanism is not limited to a mechanism composed of a pin 35, an offsetting means 36, and a driving unit 37 as shown in FIG. For example, A mechanism is provided in which an opening is provided on the side surface of the circular blade 12 and a pin that moves toward the side of the circular blade 12 during operation is inserted into the opening, thereby stopping the rotation of the circular blade 12. .

Next, a cutting line forming method of the cutting line forming apparatus 1 "according to the third embodiment will be described. Fig. 12 illustrates a cutting line forming method 600. In this method 600, first, a circular cutter 12 is set when the cutting unit 10 is in a standby position. Reference state (S601). The standby position of the cutting unit 10 is, as in the first embodiment, the position of the cutting unit 10 before the formation of the cutting line, and the end of one of the cutting bases 40 ( In Fig. 11, the position between the right end portion of the pedestal 40) and one of the support portions 30a. The reference state can be set to the state when the circular cutter 12 is stopped by the lock mechanism.

When the cutting unit 10 is in the standby position (S602), the control unit 50 instructs the driving unit 37 of the offsetting means 36 to operate (S603), and the offsetting means 36 moves to a pin 35 provided on the side of the circular cutter 12 Engagement position (S604). The control unit 50 then instructs the first driving unit 18 to rotate the circular cutter 12 (S605), and the circular cutter 12 is rotated (S606). Once the pin 35 of the circular cutter 12 abuts the canceling means 36, the circular cutter 12 stops (S607). Next, the control unit 50 instructs the driving unit 37 to retract the offsetting means 36 (S608), and the offsetting means 36 is retracted to a position where it does not engage with the pin 35 (S609).

At this time, the circular cutter 12 is in its reference state.

Next, the control section 50 instructs the first driving section 18, the second driving section 26, and the height adjusting section 14 to start forming a cutting line, and the circular cutter 12 A scribe line is formed in the optical film laminate F.

In subsequent processes S610 to S615, a cutting line CL1 is formed in the optical film laminate F. Moreover, S602 to S618 are repeated, and the cutting lines CL2, CL3, ... are sequentially formed.

[An embodiment of forming a cutting line from two directions]

In the first to third embodiments described above, a plurality of cutting lines are formed from one side end portion of the optical film layered body F toward the other side end portion. In other words, the standby position of the cutting unit 10 is located at one end of the device (for example, the end facing the right side in FIG. 1). When the formation of a cutting line is completed, the cutting unit 10 Without touching the surface of the optical film layered body F, move from the other end of the device (for example, the end facing the left side in FIG. 1) to the standby position of one end, and return the circular cutter 12 to the reference After the state, the next cutting line is formed.

On the other hand, in any of the first embodiment to the third embodiment, a cutting line can be formed from both side end portions of the optical film layered body F. That is, for example, after the cutting line CL1 is formed from the side end portion FR to the side end portion FL of the optical film layered body F, the next cutting line CL2 may be formed from the side end portion FL of the optical film layered body F. The side end portion FR is formed, and the next cutting line CL3 is formed from the side end portion FR of the optical film laminate F toward the side end portion FL like the cutting line CL1. In order to achieve cutting line formation from two directions in this way, the stand-by position of the cutting unit 10 is not only provided at one end portion in the width direction of the cutting base 40 (for example, As shown in FIG. 2, the right end of the cutting base 40 is located between the one supporting portion 30 a and the other end of the cutting base 40 in the width direction (for example, the left end of the cutting base 40 in FIG. 2). ) And the other support portion 30b. Here, the standby position provided at one end in the width direction is referred to as a first standby position, and the standby position provided at the other end in the width direction is referred to as a second standby position.

For example, in the cutting line forming apparatus 1 shown in FIG. 1 and FIG. 2, it is preferable to provide a space between the cutting base 40 and the support portion 30 b and the same degree of space between the cutting base 40 and the support portion 30 a so that The cutting unit 10 having completed the formation of one cutting line is on standby at the second standby position. The same applies to the cutting line forming device 1 ′ shown in FIG. 7 and the cutting line forming device 1 ″ shown in FIG. 11. In the case of the cutting line forming device 1 ′, a reading section 32 and an illumination 34 are also provided at the second standby position. In the case of the cutting line forming device 1 ", an offsetting means 36 and a driving portion 37 are also provided at the second standby position.

In the embodiment in which cutting lines are formed from both end portions in the width direction of the optical film layered body F, one cutting line CL1 is formed from the right end portion FR toward the left end portion FL of the optical film layered body F, and then a circular cutter is formed. The rotation of 12 is stopped, and the cutting unit 10 is moved to the second standby position. Next, at the second standby position, the circular cutter 12 is returned to the reference state. The circular cutter 12 returned to the reference state at the second standby position is given an instruction from the control unit 50 to the first driving unit 18, and is given a rotation in the opposite direction when the cutting line CL1 is formed, and is accompanied to the cutting unit 10 In the horizontal direction, the cutting line CL2 is formed from the side end portion FL toward the side end portion FR of the optical film laminate.

In this embodiment, for example, the cutting line forming method 100 is used as an example to describe, and the cutting line CL1 is formed from the side end portion FR of the optical film laminate F toward the side end portion FL (for example, S117 and S118 of the method 100). After the rotation of the circular cutter 12 is stopped (S120), the cutting unit 10 moves to the second standby position at S122 by the standby position movement instruction S121 made by the control unit 50. The circular cutter 10 adjusts the rotation angle at the second standby position, and returns to the reference state (S114). After returning to the reference state, the circular cutter 10 is rotated in the direction opposite to the rotation direction when the cutting line CL1 is formed (S116), and the cutting line CL2 is formed from the side end portion FL toward the side end portion FR of the optical film laminate (S117 , S118).

In the embodiment in which the cutting lines are formed from both side end portions of the optical film layered body F, a configuration in which the second standby position is not provided can also be designed. In the case of this configuration, for example, after the cutting line CL1 is formed from the side end portion FR toward the side end portion FL of the optical film laminate F, the rotation of the circular cutter 12 is temporarily stopped. The position of the reference point of the circular cutter 12 at the time of stopping is not specified. Next, the circular cutter 12 is rotated in the reverse direction to form a cutting line CL2 from the side end portion FL toward the side end portion FR. When the cutting line CL2 is formed, the number of rotations and the moving speed of the circular cutter 12 are accurately controlled to be the same as when the cutting line CL1 is formed. The circular cutter 12 having formed the cutting line CL2 is returned to the first standby position and returned to the reference state, and then the next cutting line CL3 is formed.

As described above, the formation of a plurality of cutting lines in order from the two side end portions of the optical film laminate F can sequentially reduce the number of cutting lines compared to a case where a plurality of cutting lines are formed from only one side end portion. Can make every unit of time The number of formed cutting lines increases, and as a result, an increase in the number of optical film films formed per unit time can be achieved. However, in the embodiment in which the second standby position is not set, but the circular cutter 12 is originally reversely rotated correctly to form the cutting line, the cutting depth pattern of all the cutting lines will be the same. In the standby position, in the second standby position, the circular cutter 12 is returned to the reference state and then the cutting line is formed. In adjacent cutting lines such as CL1 and CL2, even at the same distance from the side end, The cutting depth of the cutting line also varies. At the same distance from the side end, the cutting lines CL3, CL5, CL7 ... are the same cutting depth as CL1, and the cutting lines CL4, CL6, CL8 are the same cutting depth as CL2 ... .. This is because, for example, when the last circular cutter 12 forming the cutting line CL1 is separated from the side end FL, the position on the circumference of the circular cutter 12 that is in contact with the side end FL is abutted when the cutting line CL2 is formed. The circumferential positions of the circular cutters 12 on the side ends FL are different. In this way, in the embodiment in which the second standby position is provided, the pattern of the cutting depth of the cutting line becomes the same pattern every other one, compared with the case where the cutting depth is irregularly different in a plurality of cutting lines, This has the advantage that it is easy to find a bad cut or to identify the cause.

Claims (14)

A cutting line forming method is a method for continuously forming a plurality of cutting lines on an optical film laminate containing a release film from the opposite side of the side on which the release film is laminated, comprising: rotating a circular cutter Project; each time a plurality of cutting lines are formed, the same position on the outer periphery of the circular cutter, that is, a predetermined position, is pressed against the side end portion of the optical film layered body to start the optical film layered body. Cutting process; a process in which the circular cutter is moved in the width direction of the optical film laminate while forming a cutting line in the optical film laminate; the optical film laminate is transported a predetermined distance in advance , As the distance between one cutting line and the next cutting line. The method for forming a cutting line according to item 1 of the scope of the patent application, wherein before the aforementioned process of rotating a circular cutter, the process of setting the aforementioned circular cutter to a reference state is further included, and the reference state is used to make the current When the circular cutter starts cutting the optical film laminate, the predetermined position always abuts a side end portion of the optical film laminate. The method for forming a cutting line according to item 2 of the scope of the patent application, further comprising: rotating the circular cutter that has been set as a reference state, and stopping the rotation of the circular cutter after forming the cutting line, and obtaining The number of rotations of the circular cutter from the reference state to the stop of rotation, and a process of calculating a deviation angle between the reference state of the circular cutter and the state when the rotation is stopped by using the number of rotations, and setting the circular cutter The reference state project includes rotating the circular cutter by the aforementioned deviation angle. The method for forming a cutting line according to item 2 of the scope of the patent application, further comprising: rotating the circular cutter that has been set as a reference state, and stopping the rotation of the circular cutter after forming the cutting line, and obtaining The process of rotating the circular cutter from the reference state to the stop of rotation, and the process of setting the circular cutter to the reference state include rotating the circular cutter in the reverse direction. The method for forming a cutting line according to item 2 of the scope of patent application, wherein the step of setting a mark on the circular cutter and setting the circular cutter as a reference state includes reading the circular shape after forming the cutting line. The position of the mark when the rotation of the tool is stopped is memorized as the current position, and the reference state of the circle cutter is calculated using the current position and the previously memorized position of the mark when the circle cutter is in the reference state. The deviation angle from the state when the rotation is stopped after the cutting line is formed causes the circular cutter to rotate the deviation angle. The method for forming a cutting line according to item 2 of the scope of the patent application, wherein the above-mentioned circular cutter is provided with a mark, and the process of setting the above-mentioned circular cutter to a reference state includes reading the aforementioned while rotating the circular cutter Mark, and determine whether the mark coincides with a previously memorized position of the mark when the circular cutter is in the reference state. The method for forming a cutting line according to item 2 of the scope of the patent application, wherein the circular cutter can stop rotation in the reference state by actuating a locking mechanism, and set the circular cutter to a reference state. The method includes operating the lock mechanism to rotate the circular cutter, and stopping the rotary cutter in the reference state by the lock mechanism. The method for forming a cutting line according to any one of claims 1 to 7, wherein the aforementioned process of rotating a circular cutter includes the step of forming the circular cutter toward the end of the formation of one cutting line. The process of rotating in the direction opposite to the direction of rotation when forming the one cutting line, and the process of forming the cutting line includes moving the circular cutter side to the direction opposite to the direction when forming the one cutting line. The process of forming the next cutting line on the aforementioned optical film laminate. The method for forming a cutting line according to any one of claims 1 to 7, further comprising a state where the circular cutter after forming one cutting line is not in contact with the optical film laminate. The process of moving downwards in the direction opposite to the direction when the one cutting line is formed, and the aforementioned process of rotating the circular cutter includes rotating the circular cutter in the same direction as the rotation direction when the one cutting line is formed The process of forming the cutting line includes the process of moving the circular cutter in the same direction as when forming the one cutting line, and forming the next cutting line in the optical film laminate. The method for forming a cutting line according to any one of claims 1 to 7 of the scope of patent application, wherein the aforementioned process of starting cutting includes the process of starting cutting after the rotation of the circular cutter reaches a stable speed. A cutting line forming device is a device for continuously forming a plurality of cutting lines on an optical film layered body containing a release film from the side opposite to the side on which the release film is laminated, comprising: a cutting unit; A circular cutter for cutting the optical film laminate, and a first driving part for rotating the circular cutter; and a cutting unit moving mechanism having the cutting unit moving the width direction of the optical film laminate A second drive unit; a control unit that controls the operations of the first drive unit and the second drive unit; the control unit uses the outer periphery of the circular cutter that is rotating whenever each of a plurality of cutting lines is formed The first position and the second position are controlled at the same position, that is, the predetermined position abuts the side end portion of the optical film laminate, to control the operations of the first driving portion and the second driving portion. The cutting line forming device according to item 11 of the scope of patent application, further comprising a rotation number detection unit that detects the rotation number of the circular cutter, and the control unit is based on the circle detected by the rotation number detection unit. The information on the number of rotations of the cutter controls the first driving section and the second driving section such that the predetermined position abuts a side end portion of the optical film laminate. The cutting line forming device according to item 11 of the scope of patent application, further comprising a mark provided on the aforementioned circular cutter, and a reading section for reading the aforementioned mark, and the aforementioned control section reads by means of the aforementioned reading device. Taking the position of the mark, the first driving portion and the second driving portion are controlled so that the predetermined position abuts a side end portion of the optical film laminate. The cutting line forming device according to item 11 of the scope of patent application, further comprising a locking mechanism that can mechanically stop the rotation of the circular cutter in a reference state, which is used to make the circular cutter When the cutting of the optical film laminated body is started, the predetermined position always abuts the side end portion of the optical film laminated body. The control unit activates the locking mechanism and rotates the circular cutter. After the lock mechanism stops the rotary cutter, the first driving portion and the second driving portion are controlled so that the predetermined position abuts a side end portion of the optical film laminate.