TWI574051B - A manufacturing system for an optical film roll, and a method for manufacturing an optical film roll - Google Patents

Description

Optical film roll manufacturing system and optical film roll manufacturing method Field of invention

The present invention relates to an optical film for slitting a long sheet-like optical film blank along its length to form a long sheet-like optical film, and winding the long sheet-shaped optical film into a roll A manufacturing system and a manufacturing method for manufacturing an optical film roll.

Background of the invention

In a stereoscopic image display device such as a 3D-LCD TV that displays a stereoscopic image, a right-eye image display region (first phase difference region) and a left-eye image in which phase differences are different from each other are alternately arranged in the width direction. A pattern retardation film such as a display region (second phase difference region), a pattern film in which a light-transmitting region and a light-shielding region are disposed, and the like. Patterns are formed in advance on these films.

In the production of an optical film roll, a wide optical film blank is usually slit at a predetermined width, and the slit optical film is wound into a roll. However, in the case of the optical film in which the pattern is formed in advance as described above, not only the slit width is required to be appropriate, but also the slitting is required to be performed with high precision at an appropriate position with respect to the pattern.

Patent Document 1 discloses a roll formed by winding a pattern retardation film.

Prior technical literature Patent literature

Patent Document 1: Japanese Special Open 2012-32445

Summary of invention

However, in Patent Document 1, the slitting at the designated position along the pattern is not specifically described.

However, in Patent Document 1, a method of performing slitting with high precision at an appropriate position with respect to the pattern is not specifically described.

The present invention has been made in view of the above-described problems, and it is an object of the invention to provide an optical film roll which can cut a high-order sheet-shaped optical film material having a pattern at a position that is accurately cut at an appropriate position with respect to a pattern. Manufacturing system and method of manufacturing an optical film roll.

In order to solve the above problems, careful study has been made to complete the following invention. In other words, in the production system of the optical film roll of the present invention, the optical film material is slit while conveying the long sheet-shaped optical film material having the pattern, and the obtained long sheet-shaped optical film is wound into a roll. An optical film roll having an image forming unit that images a slit line in a longitudinal direction of the transported optical film, that is, a slit line and a pattern in the vicinity thereof; and a calibration unit; The position of the optical film blank in the width direction is adjusted based on the imaging result obtained by the imaging unit.

According to this configuration, since the position of the optical film material in the width direction is adjusted based on the position in the width direction of the slit line and the pattern in the vicinity thereof, the optical film material can be slit with high precision at an appropriate position with respect to the pattern.

Examples of the pattern include a line (reference line) parallel to the longitudinal direction of the optical film blank or a line (reference line) parallel to the transport direction (longitudinal direction) of the long sheet-shaped optical film material to be transported.

In the present specification, the "width direction" means a direction orthogonal to the transport direction (longitudinal direction) of the long sheet-shaped optical film material to be transported.

Moreover, in the manufacturing system of the optical film roll of another invention of this invention, the long sheet-shaped optical film material which has a pattern is cut, and the obtained long sheet-shaped optical film is wound in roll shape, and manufacture. An optical film roll having a discharge portion that discharges the optical film blank from an optical film blank roll, and a transport portion that downstream of the optical film blank discharged from the discharge portion a slitting portion that continuously cuts the optical film blank conveyed by the conveying portion along a longitudinal direction to obtain the long sheet-shaped optical film; and an image pickup portion that is disposed downstream of the slit portion On the side, the end surface of the transported optical film that is cut in the longitudinal direction, that is, the slit line and the pattern in the vicinity thereof are imaged; and the calibration unit adjusts the aforementioned width direction based on the imaging result obtained by the imaging unit. The position of the optical film blank; and A winding portion that winds the optical film obtained by the slitting portion into a roll shape.

According to this configuration, since the position of the slit portion in the width direction is adjusted based on the position in the width direction of the slit line and the pattern in the vicinity thereof, the optical film blank can be slit with high precision at an appropriate position with respect to the pattern.

Further, in an embodiment of the invention, the imaging unit captures the slit line and the pattern in the vicinity thereof while the optical film is in close contact with the convex curved surface formed in an arc shape along the longitudinal direction of the optical film.

According to this configuration, the variation in the conveyance of the optical film blank can be eliminated, and the measurement deviation in the measurement of the position of the slit line in the width direction can be reduced. Therefore, the slitting can be performed with high precision at a position more appropriate for the pattern.

Further, in an embodiment of the invention, the optical film roll manufacturing system further includes an illumination unit that illuminates an imaging region including the slit line of the optical film captured by the imaging unit.

According to this configuration, by illuminating the imaging region including the slit line, since the pattern of the slit line and its vicinity is conspicuous, the captured image is sharp, and the measurement error can be reduced. It is preferable for the imaging unit to illuminate the slit line (and its pattern) by the reflected light method, and to illuminate the slit line (and its pattern) by the transmitted light method, so that the edge of the slit line (and its pattern) is conspicuous.

Further, in an embodiment of the invention, the calibration unit includes a release position adjustment unit that adjusts a position of the release unit in the width direction.

Further, in an embodiment of the invention, the calibration unit has a portion that is a part of the transport unit and is transported by the transport unit A sheet aligning portion for adjusting the position of the optical film blank in the width direction.

The position in the width direction of the discharge portion can be adjusted by the discharge position adjusting portion, and the position in the width direction of the optical film blank during conveyance can be adjusted by the sheet aligning portion. The adjustment by the release position adjustment unit is larger than the adjustment by the sheet calibration unit (the movement distance is large), and the calibration of the sheet calibration unit is suitable for the small calibration. Thereby, the optical film blank can be slit with high precision at an appropriate position with respect to the pattern.

The sheet aligning portion has, for example, at least two rollers and a moving mechanism that freely moves the rollers in the longitudinal direction thereof. The two rolls and the optical film blank were arranged such that the longitudinal direction of the two rolls was parallel to the width direction of the optical film blank, and the optical film blank was wound onto two rolls. While the optical film blank is conveyed, the two rollers are moved in the width direction by the moving mechanism, and the position of the optical film blank in the width direction can be finely adjusted.

Further, in an embodiment of the invention, the optical film roll manufacturing system further includes a display unit that displays a slit line (and a pattern thereof) of an image captured by the image capturing unit.

According to this configuration, by outputting (displaying) a slit line (and a pattern thereof) imaged by the imaging unit on a display unit such as a monitor, the operator can easily confirm whether or not the position is appropriate with respect to the pattern by visual observation. Divide.

Further, in an embodiment of the invention, the optical film is a pattern retardation film in which a first phase difference region and a second phase difference region having different phase differences are alternately arranged in the width direction.

As the pattern retardation film, for example, it is provided by A pattern phase difference film (a retardation film for a stereoscopic image display device) in a device for displaying a stereoscopic image and a left eye image is displayed.

Further, in one embodiment of the invention, the optical film is a pattern retardation film-integrated polarizing plate having a laminated pattern retardation film and a polarizing film having an absorption axis parallel to the longitudinal direction, and the pattern retardation film has a width along the width The first phase difference region and the second phase difference region in which the phase differences are different from each other are alternately arranged in the direction.

Moreover, in one embodiment of the invention, the optical film is a pattern film in which a light-transmitting region and a light-shielding region are alternately arranged in the width direction.

Further, examples of the cutting member of the slitting portion include a cutter and a laser. Further, the cutting member of the slit portion may be provided, for example, two or more in the width direction of the optical film blank.

Further, in the method for producing an optical film roll according to another aspect of the invention, the optical film material is cut while conveying a long sheet-shaped optical film material having a pattern, and the obtained long sheet-shaped optical film is wound into An optical film roll is produced in a roll shape, and the method of manufacturing the optical film roll includes: an image capturing step of photographing a slit line in a longitudinal direction of the transported optical film, that is, a slit line and a pattern in the vicinity thereof; and a calibration step The position in the width direction of the optical film blank is adjusted based on the imaging result obtained in the aforementioned imaging step.

Further, in the method for producing an optical film roll according to another aspect of the invention, the optical film material is cut while conveying a long sheet-shaped optical film material having a pattern, and the obtained long sheet-shaped optical film is wound into Roll-form An optical film roll comprising: a releasing step of discharging the optical film blank from an optical film blank roll; and a transporting step of flowing the optical film blank discharged in the releasing step downstream In the slitting step, the optical film blank conveyed by the transporting step is continuously cut along the longitudinal direction of the optical film, which is a pattern film, to obtain the long strip-shaped optical film, and the pattern film is disposed. a light-transmitting region and a light-shielding region; and an image capturing step of performing the image forming step on the downstream side of the slitting step, and performing the cut end of the transported optical film in the longitudinal direction, that is, the slit line and the pattern in the vicinity thereof a photographing; a calibration step of adjusting a position in the width direction of the optical film blank based on an image pickup result obtained in the image pickup step; and a winding step of winding the optical film obtained in the slitting step into a roll shape.

1‧‧‧Optical film roll manufacturing system

10‧‧‧Release Department

20‧‧‧Flake Calibration Department

21‧‧‧First calibration roller

22‧‧‧Second calibration roller

23‧‧‧Direct moving mechanism

30‧‧‧cutting

41‧‧‧First Camera Department

43, 44‧‧‧ slit camera

50‧‧‧Transportation Department

51a, 51b, 52, 53, 54‧‧‧ conveyor rollers

60‧‧‧ Release position adjustment unit

70‧‧‧Winding Department

80‧‧‧Long sheet of optical film blank

81, 82, 83, 84‧‧‧ long strips of optical film

90‧‧‧Information processing device

91‧‧‧Determining Department

92‧‧‧ Computing Department

93‧‧‧Control Department

95‧‧‧Monitor

411‧‧‧Circular Lighting Department

431, 441‧‧‧ rod-shaped lighting department

L1‧‧‧ baseline

L11‧‧‧ test line

C1, C2, C3‧‧‧ tangent

R1‧‧‧ Blank roll

R2, R3, R4‧‧‧ Roll

Fig. 1A is a schematic view showing a manufacturing system of an optical film roll of the first embodiment.

FIG. 1B is a view showing an example of a slitting portion and a first imaging unit.

Fig. 2 is a view showing an example of a reference line in the first embodiment;

FIG. 3 is a view illustrating a field of view of the first imaging unit.

Fig. 4 is a schematic view showing a system for manufacturing an optical film roll according to a second embodiment;

Fig. 5 is a schematic view showing a manufacturing system of an optical film roll according to a third embodiment.

Fig. 6 is a schematic view showing a system for manufacturing an optical film roll according to a fourth embodiment;

Fig. 7 is a schematic view showing a system for manufacturing an optical film roll according to a fifth embodiment.

Detailed description of the preferred embodiment

(Embodiment 1)

The long sheet-shaped optical film material of the first embodiment is an optical film material (an example of a pattern retardation film-integrated polarizing plate) in which a pattern retardation film and a polarizing film having an absorption axis parallel to the longitudinal direction are laminated. The pattern retardation film alternately arranges a first phase difference region and a second phase difference region having phase differences from each other in the width direction. The film width of the optical film blank is, for example, 1200 mm or more and 2400 mm or less.

The long strip-shaped optical film blank is formed with a reference line L1 parallel to its longitudinal direction. This reference line L1 is a part of the pattern of the pattern retardation film. The reference line L1 may be one or more than two. Further, examples of the line type of the reference line include a solid line and a broken line, but a solid line is preferable. The size of the width of the reference line orthogonal to the longitudinal direction and the color of the reference line are not particularly limited as long as they can be imaged by the imaging unit and subjected to image analysis.

The structure of the optical film roll manufacturing system 1 of the first embodiment will be described with reference to Figs. 1A and 1B. FIG. 2 shows an example of a reference line L1 formed on the long sheet-shaped optical film blank 80.

The discharge unit 10 discharges the long sheet-shaped optical film blank 80 having the reference line parallel to the longitudinal direction from the billet roll R1. The discharge unit 10 has a rotation mechanism that rotates the billet roll R1. The rotating mechanism can be freely rotated or coupled to the motor to be driven to rotate.

The conveying unit 50 directs the optical film blank 80 discharged from the discharging unit 10 Downstream transport. The transport unit 50 can feed the optical film blank 80 by means of a nip roller (not shown), or can roll the slit-shaped optical film roll by the winding portion 70 disposed on the downstream side, which will be described later. The conveyance is carried out around the rolls R2, R3, and R4, and the conveyance may be performed by the above two methods. In the first embodiment, the conveying unit 50 has the conveying rollers 51a and 51b before the slitting portion 30, and the conveying rollers 52, 53, and 54 at the rear portion of the slitting portion 30. The conveying rollers 51a, 51b, 52 are preferably composed of, for example, a cylindrical roller or a grooved roller.

The slitting unit 30 continuously cuts the optical film blank 80 conveyed by the transport unit 50 in the longitudinal direction to obtain elongated optical films 81, 82, 83, and 84. In FIG. 1A, a winding portion for winding the optical film 84 which is one end portion of the optical film blank 80 in the width direction is omitted.

The cutting member of the slitting portion 30 is, for example, a cutter or a laser. From the viewpoint of the quality of the cut surface, a cutter is preferable, and it is more preferable to face the cut object with two cutters. A shared cut of the cut. In the first embodiment, the slitting portion 30 is configured such that three cutting members are arranged linearly in the width direction of the optical film blank 80.

The first imaging unit 41 is disposed on the downstream side of the slit unit 30. The first imaging unit 41 images the slit line C1 (or C2, C3), which is the end surface in the longitudinal direction of the optical film blank 80 conveyed by the transport unit 50, and the pattern (including the reference line L1) in the vicinity thereof. The first imaging unit 41 is configured by, for example, an area array camera. As shown in FIGS. 1B and 3, the first imaging unit 41 captures the slit line C1 and the reference line L1 in the field of view.

The first imaging unit 41 photographs while the optical film blank 80 is in close contact with the convex curved surface formed in an arc shape along the longitudinal direction of the optical film blank 80. The tangent line C1 and the reference line L1. As the convex curved surface, a roller 52 constituting a part of the conveying portion 50 is used.

The annular illumination unit 411 is used as an illumination unit that illuminates an imaging region including the slit line C1 of the optical film blank 80 captured by the first imaging unit 41. As shown in FIG. 1A, the first imaging unit 41 is disposed on the same side as the annular illumination unit 411 with respect to the optical film blank 80, and is disposed at a position away from the optical film blank 80 than the annular illumination unit 411. Further, between the first imaging unit 41 and the optical film blank 80, a region in which one of the reference lines is formed is provided to be in a relationship of a cross-Nicol 稜鏡 and a relationship in which the other region is parallel to a Nicole 的 is provided. Circular polarizing plate.

The image captured by the first imaging unit 41 is subjected to image analysis by the information processing device 90. The determination unit 91 of the information processing device 90 detects the edge (the detection line L11) in the longitudinal direction of the slit line C1 and the reference line L1 obtained by performing image analysis. FIG. 3 shows an example of the detection line L11 and the slit line C1. The determination unit 91 determines whether or not the slit line C1 is located at a predetermined standard position (a position where the slit line C1 should be) in the field of view of the camera (or is disposed within a predetermined range). The determination unit 91 measures, for example, the vertical distance from the right end of the detection line L11 of the reference line L1 or the visual field range (imaging region) on the graph surface of FIG. 3 to the slit line C1, and determines whether or not the measured value is within a predetermined value range. When the determination unit 91 determines that the position of the slit line C1 is at a predetermined standard position (a position where the slit line C1 should be) (or is disposed within a predetermined range), the determination unit 91 may display the display without giving any instruction. The monitor 95 of the section outputs an image. The "standard position or a predetermined range" can be set based on, for example, a vertical distance from the detection line L11 of the reference line L1.

On the other hand, when the determination unit 91 determines that the slit line C1 is not located at a predetermined standard position (a position where the slit line C1 should be) (or is not disposed within a predetermined range), the calculation unit 92 obtains the release unit. The direction of movement and the amount of movement of 10. The calculation unit 92 determines, for example, the moving direction (direction opposite to the offset direction) and the amount of movement of the discharge unit 10 from the offset direction and the offset amount of the standard line position of the slit line C1 of the image. The amount of movement can be the same as the offset, and can be larger than the offset or smaller than the offset. Then, the control unit 93 instructs the above-described release position adjustment unit 60 to the above-described obtained movement direction and movement amount.

The release position adjustment unit 60 adjusts the position in the width direction of the discharge unit 10 based on the imaging result (image) obtained by the first imaging unit 41. The release position adjustment unit 60 has a movement mechanism for moving the discharge unit 10 in the width direction thereof, and the movement direction adjusts the position in the width direction of the discharge unit 10 based on the movement direction and the amount of movement transmitted from the control unit 93. As the moving mechanism, for example, a linear motion mechanism can be cited.

The winding portion 70 winds the long sheet-shaped optical films 81, 82, and 83 cut by the slit portion 30 around the rolls R2, R3, and R4, respectively. The winding unit 70 includes a motor and a rotating mechanism (not shown), and rotates the rolls R2, R3, and R4 at the same speed and at the same speed to wind the long-length optical films 81, 82, and 83, respectively.

The slit imaging units 43 and 44 are disposed on the downstream side of the slitting unit 30 (and the first imaging unit 41), and are used to capture the cut ends C1 and C2 which are the end faces in the longitudinal direction of the transported optical film. The slit imaging units 43 and 44 are constituted by a line camera.

The slit imaging portions 43, 44 are in the optical film 81, 82 and along the optical film 81 and 82 are formed in a circular arc-shaped convex curved surface in the longitudinal direction, and a slit line (cut surface after slitting) is taken. As the convex curved surface, rollers 53 and 54 constituting a part of the conveying portion 50 are used.

The rod-shaped illumination units 431 and 441 are used as the illumination unit that illuminates the imaging region including the slit lines C1 and C2 captured by the slit imaging units 43 and 44. As shown in FIG. 1A, the slit image pickup units 43 and 44 are disposed on the same side as the rod-shaped illumination portions 431 and 441 with respect to the optical films 81 and 82, and are disposed farther from the rod-shaped illumination portions 431 and 441. The position of the membranes 81, 82. Further, between the slit image capturing units 43 and 44 and the optical films 81 and 82, one of the regions forming the reference line is disposed to cross the Nicole and the other region is parallel to the Nicole. The circular polarizing plate of the relationship.

The images captured by the slit imaging units 43, 44 can be transmitted and displayed to the monitor. By outputting (displaying) the slit positions captured by the slit image pickup units 43, 44 on the monitor 95, the operator can easily visually confirm the slit lines C1, C2. FIG. 4 shows an example of an image of the slit line C1 captured by the slit image capturing units 43 and 44.

(Embodiment 2)

The structure of the optical film roll manufacturing system 2 of the second embodiment will be described with reference to Fig. 4 . The configuration different from the first embodiment will be described, and the description of the same configuration will be omitted.

The transport unit 50 has a sheet aligning unit 20 that adjusts the position of the optical film blank 80 in the width direction based on an image obtained by the first imaging unit 42 between the emitting unit 10 and the first imaging unit 42 . The first imaging unit 42 has the same configuration as the first imaging unit 41 of the first embodiment. Information processing device 90 In the same manner as in the first embodiment, the moving direction and the amount of movement are obtained, and a command is issued to the sheet aligning unit 20, and the sheet aligning unit 20 adjusts the position in the width direction of the optical film blank 80.

When the determination unit 91 determines that the slit line C1 of the image is not located at a predetermined standard position (a position where the slit line C1 should be) (or is not disposed within a predetermined range), the calculation unit 92 obtains a sheet. The moving direction and amount of movement of the aligning portion 20. The calculation unit 92 determines, for example, the moving direction (the direction opposite to the offset direction) and the amount of movement of the sheet aligning unit 20 from the offset direction and the shift amount of the standard position of the slit line C1 of the image. The amount of movement can be the same as the offset, and can be larger than the offset or smaller than the offset. Then, the control unit 93 instructs the sheet aligning unit 20 to determine the moving direction and the amount of movement described above. The sheet aligning portion 20 adjusts the position in the width direction of the optical film blank 80 based on the above-described moving direction and amount of movement.

The sheet aligning portion 20 of the second embodiment has a first aligning roller 21, a second aligning roller 22, and a linear motion mechanism 23 that freely moves the first and second aligning rollers 21, 22 in the longitudinal direction thereof. The first and second registration rollers 21, 22 and the optical film blank 80 are disposed such that the longitudinal directions of the first and second registration rollers 21, 22 are parallel to the width direction of the optical film blank 80. As shown in FIG. 4, the optical film blank 80 is wound around the first alignment roller 21 at an angle of 90° from the lower side to the right side, and then the optical film blank 80 is wound downward at a 90° angle to the second calibration. Roller 22. While the optical film blank 80 is being transported by the transport unit 50, the first and second registration rollers 21 and 22 are moved in the film width direction by the linear motion mechanism 23, and the position of the optical film blank 80 in the width direction is finely adjusted.

(Embodiment 3)

The structure of the optical film roll manufacturing system 3 of the third embodiment will be described with reference to Fig. 5 . The third embodiment has the configurations of both the first embodiment and the second embodiment. The calibration unit includes both the release position adjustment unit 60 and the sheet calibration unit 20.

The position in the width direction of the discharge unit 10 is adjusted by the discharge position adjusting unit 60, and the position in the width direction of the optical film blank 80 being conveyed is adjusted by the sheet aligning unit 20. The adjustment by the release position adjustment unit 60 is larger than the adjustment by the sheet calibration unit 20 (the movement distance is large), and the calibration of the sheet calibration unit 20 is a small calibration.

(Embodiment 4)

The structure of the optical film roll manufacturing system 4 of the fourth embodiment will be described with reference to Fig. 6 . The slit imaging units 43 and 44 are used instead of the first imaging unit 41.

The images (the slit lines C1 and C2) captured by the slit image capturing units 43 and 44 are subjected to image analysis by the information processing device 90. The determination unit 91 of the information processing device 90 detects the slit lines C1 and C2 of the image obtained by the image analysis. As shown in FIG. 3, it is judged whether or not the slit line C1 is located at a predetermined standard position (a position where the slit line should be) within the field of view of the camera (or is disposed within a predetermined range). The determination unit 91 measures, for example, a vertical distance from a part of the line of the pattern to the slit line, and determines whether or not the measured value is within a predetermined value range. When the determination unit 91 determines that the position of the slit line C1 (and/or C2) of the image is located at a predetermined standard position (or is disposed within a predetermined range), the determination unit 91 may display the display without giving any instruction. The monitor 95 of the section outputs an image. Further, the determination unit 91 may perform determination based on an image captured by one of the slit imaging units 43 and 44, or may perform judgment based on both images. Broken.

On the other hand, when the determination unit 91 determines that the slit line C1 (and/or C2) of the image is not located at a predetermined standard position (or is not disposed within a predetermined range), the calculation unit 92 obtains the release unit. The direction of movement and the amount of movement of 10. The calculation unit 92 measures the moving direction (the direction opposite to the offset direction) and the amount of movement of the discharge unit 10 by, for example, measuring the offset direction and the offset amount of the slit line from the standard position. The amount of movement can be the same as the offset, and can be larger than the offset or smaller than the offset. Then, the control unit 93 instructs the release position adjustment unit 60 to determine the moving direction and the amount of movement described above. The discharge position adjusting unit 60 adjusts the position in the width direction of the discharge unit 10 in accordance with the moving direction and the amount of movement.

(Embodiment 5)

The structure of the optical film roll manufacturing system 5 of the fifth embodiment will be described with reference to Fig. 7 . In the fifth embodiment, when the determination unit 91 determines that the slit line C1 (and/or C2) of the image is not located at a predetermined standard position (or is not disposed within a predetermined range), the calculation unit 92 obtains The moving direction and amount of movement of the sheet aligning portion 20. The calculation unit 92 measures the moving direction (the direction opposite to the offset direction) and the amount of movement of the sheet-like aligning unit 20, for example, by measuring the offset direction and the offset amount of the slit line from the standard position. The amount of movement can be the same as the offset, and can be larger than the offset or smaller than the offset. Then, the control unit 93 instructs the sheet aligning unit 20 to determine the moving direction and the amount of movement described above. The sheet aligning unit 20 adjusts the position in the width direction of the sheet aligning unit 20 in accordance with the moving direction and the amount of movement described above.

(Embodiment 6)

The sixth embodiment has the configurations of both the fourth embodiment and the fifth embodiment. The measurement position adjustment unit 60 and the sheet calibration are adjusted in accordance with the measurement results (moving direction, movement amount) measured by the information processing device 90 based on the imaging results (images) obtained by the slit imaging units 42 and 43 . Department 20 these two parties.

<Manufacturing method>

In the method for producing an optical film roll, the optical film material is cut while conveying a long sheet-shaped optical film material having a pattern, and the obtained long sheet-shaped optical film is wound into a roll to produce optical A film roll method comprising: an image capturing step of photographing a slit line of a longitudinal direction of the transported optical film, that is, a slit line and a pattern thereof; and a calibration step based on an image pickup result obtained in the image pickup step The position of the optical film blank in the width direction is adjusted.

Further, in another method of producing an optical film roll, the optical film material is slit while conveying a long sheet-shaped optical film material having a pattern, and the obtained long sheet-shaped optical film is wound into a roll. The method for producing an optical film roll, comprising: a releasing step of discharging the optical film blank from the optical film blank roll; and a conveying step of conveying the optical film blank discharged in the discharging step downstream; a step of continuously cutting the optical film blank conveyed by the transporting step along the longitudinal direction of the optical film, which is a pattern film, to obtain the long strip-shaped optical film, wherein the patterned film is provided with a light-transmitting region And a light-shielding region; the image capturing step is performed on the downstream side of the slitting step, and the slit end of the end surface in the longitudinal direction of the transported optical film is cut and a pattern is captured in the vicinity; a calibration step is performed to adjust a position in the width direction of the optical film blank based on an image pickup result obtained in the image capturing step; and a winding step of winding the optical film obtained in the slitting step into a roll shape .

(Other embodiments of optical film)

In the above embodiment, the optical film material is described as an example of the pattern retardation film-integrated polarizing plate. However, the film film of the optical film material may be alternately arranged in the width direction. A patterned film of a light region and a light-shielding region.

1‧‧‧Optical film roll manufacturing system

10‧‧‧Release Department

30‧‧‧cutting

41‧‧‧First Camera Department

43, 44‧‧‧ slit camera

50‧‧‧Transportation Department

51a, 51b, 52, 53, 54‧‧‧ conveyor rollers

60‧‧‧ Release position adjustment unit

70‧‧‧Winding Department

80‧‧‧Long sheet of optical film blank

81, 82, 83‧‧‧ long strips of optical film

90‧‧‧Information processing device

91‧‧‧Determining Department

92‧‧‧ Computing Department

93‧‧‧Control Department

95‧‧‧Monitor

411‧‧‧Circular Lighting Department

431, 441‧‧‧ rod-shaped lighting department

R1‧‧‧ Blank roll

R2, R3, R4‧‧‧ Roll

Claims (12)

A manufacturing system of an optical film roll which cuts an optical film material while conveying a long sheet-shaped optical film material having a pattern, and winds the obtained long sheet-shaped optical film into a roll shape An optical film roll is produced, the pattern having a reference line parallel to the longitudinal direction or a reference line parallel to the transport direction, and further, the optical film roll manufacturing system has an image pickup unit that faces the transported optical film The end surface in the longitudinal direction, that is, the slit line and the pattern including the reference line in the vicinity thereof, is imaged, and the calibration unit adjusts the position in the width direction of the optical film blank based on the imaging result obtained by the imaging unit. The manufacturing system of the optical film roll of claim 1, further comprising an illuminating unit that illuminates an imaging region including the slit line of the optical film captured by the imaging unit. A manufacturing system of an optical film roll according to claim 1, wherein the aligning portion has a discharge position adjusting portion that adjusts a position in a width direction of the discharge portion. The manufacturing system of the optical film roll according to claim 1, wherein the aligning portion has a sheet aligning portion that adjusts a position in a width direction of the optical film blank conveyed by the conveying portion as a part of the conveying portion . A manufacturing system of an optical film roll of claim 1, wherein There is also a display unit that displays an image captured by the imaging unit. The optical film roll manufacturing system of claim 1, wherein the optical film is a pattern retardation film in which a first phase difference region and a second phase difference region having different phase differences from each other are alternately arranged in the width direction. The optical film roll manufacturing system according to claim 6, wherein the optical film is a pattern retardation film-integrated polarizing plate comprising a laminated pattern retardation film and a polarizing film having an absorption axis parallel to the longitudinal direction. The pattern retardation film alternately arranges a first phase difference region and a second phase difference region in which phase differences are different from each other in the width direction. The manufacturing system of the optical film roll of claim 1, wherein the optical film is a pattern film in which a light transmitting region and a light blocking region are disposed. A manufacturing system of an optical film roll, which cuts a long sheet-shaped optical film material having a pattern, and winds the obtained long sheet-shaped optical film into a roll shape to manufacture an optical film roll. The pattern has a reference line parallel to the longitudinal direction or a reference line parallel to the transport direction, and the optical film roll manufacturing system has a discharge portion that discharges the optical film blank from the optical film blank roll; The optical film blank discharged from the discharge portion is transported downstream; the slit portion continuously cuts the optical film blank conveyed by the transport portion along the longitudinal direction to obtain the long strip-shaped optical a film; an imaging unit disposed on a downstream side of the slit portion, and photographing a slit line along a longitudinal end surface of the optical film to be conveyed, that is, a slit line including the reference line; The calibration unit adjusts a position of the optical film blank in the width direction based on an imaging result obtained by the imaging unit, and a winding unit that winds the optical film obtained by the slitting portion into a roll shape. The manufacturing system of the optical film roll of claim 1 or 9, wherein the image pickup unit picks up the slit line while adhering the optical film to a convex curved surface formed in an arc shape along a longitudinal direction of the optical film. And the patterns around it. A method for producing an optical film roll, wherein the optical film material is cut while conveying a long sheet-shaped optical film material having a pattern, and the obtained long sheet-shaped optical film is wound into a roll to be manufactured. The optical film roll, the pattern having a reference line parallel to the longitudinal direction or a reference line parallel to the transport direction, and the method of manufacturing the optical film roll includes: an image capturing step of the length of the optical film to be transported The end surface of the direction, that is, the slit line and the pattern including the reference line in the vicinity thereof, is imaged; and the calibration step adjusts the position in the width direction of the optical film blank based on the image pickup result obtained in the image pickup step. A method for manufacturing an optical film roll, which conveys a long pattern The strip-shaped optical film blank is slit into the optical film material, and the obtained long sheet-shaped optical film is wound into a roll to produce an optical film roll having a reference line parallel to the longitudinal direction. Or a reference line parallel to the transport direction, and the method for manufacturing the optical film roll includes: a releasing step of discharging the optical film blank from the optical film blank roll; and a transporting step of the optical light discharged in the releasing step The film material is transported downstream; the slitting step is performed by continuously cutting the optical film blank conveyed by the transporting step along the longitudinal direction of the optical film, which is a pattern film, to obtain the long strip-shaped optical film. a light-transmitting region and a light-shielding region are disposed on the pattern film; and an image capturing step is performed on the downstream side of the slitting step, and a slit line of the cut end surface of the optical film that is conveyed in the longitudinal direction and Photographing a pattern including the aforementioned reference line in the vicinity; a calibration step of adjusting the optical film based on the image pickup result obtained in the aforementioned image capturing step Widthwise position of the material; and a winding step, the optical film obtained in the previous slitting step, wound in a roll.