KR102469408B1 - Defect inspection system, film manufacturing apparatus, film manufacturing method, printing apparatus, and printing method - Google Patents

Abstract

While the long strip-shaped film F105 is conveyed, the printing device 50 that prints on the recording area S along the edge of the film F105 has a printing head that prints on the film F105 ( 13a), a meandering detection unit 53 that detects meandering of the film F105, and a head operation unit 51 that moves the printing head 13a in a direction crossing the transport direction of the film F105, According to the meandering of the film F105 detected by the meandering detection unit 53, the head operation unit 51 moves the printing head 13a to a position facing the recording area S.

Description

Defect inspection system, film manufacturing device, film manufacturing method, printing device and printing method

The present invention relates to a defect inspection system, a film manufacturing apparatus, a film manufacturing method, a printing apparatus, and a printing method.

For example, an optical film such as a polarizing plate is wound around a core material after inspecting defects such as foreign matter defects and concavo-convex defects. Information on the position and type of defect (hereinafter, referred to as defect information) is recorded on the optical film by printing a barcode on the edge of the optical film or marking the defective portion. When the amount of winding of the optical film wound around the core material reaches a certain amount, it is separated from the optical film on the upstream side and shipped as a raw material roll. For example, Japanese Unexamined Patent Publication No. 2011-7779 discloses a defect inspection system provided on an optical film conveyance line with a defect inspection device and a recording device for recording defect information on the film.

By the way, in the defect inspection system described above, when recording defect information on an optical film, meandering may occur in the optical film being transported depending on the state of the optical film, transportation conditions, and the like. When such meandering occurs in the optical film, there is a possibility that defect information printed by the ink ejected from the printing head may not be clearly recorded in the recording area along the edge of the optical film, resulting in a printing error.

An aspect of the present invention has been proposed in view of such a conventional situation, and even when meandering occurs while conveying a long strip-shaped film, a defect inspection system capable of appropriately printing in the recording area along the edge of the film , a film manufacturing device, a film manufacturing method, a printing device, and a printing method.

In order to solve the above problem, the aspect of the present invention adopts the following configuration.

A defect inspection system according to one aspect of the present invention includes a conveyance line for conveying a long strip-shaped film, a defect inspection apparatus for inspecting defects of a film conveyed through the conveyance line, and defect information based on the defect inspection result. A recording device for recording on the film conveyed by the conveyance line, the recording device comprising: a printing head for printing the defect information in a recording area along an edge of the film; a meandering detection unit for detecting meandering of the film; , a head operation unit for moving the printing head in a direction crossing the transport direction of the film relative to the film, and the head operation unit moves the printing head according to the meandering of the film detected by the meander detection unit. It is moved to a position facing the recording area.

Further, in the defect inspection system of the above aspect, the meandering detection unit has a plurality of sensors arranged side by side in a direction crossing the transport direction of the film, and the plurality of sensors are integrated with the printing head by the head operation unit You may operate moving in the direction which intersects the conveyance direction of the said film.

Further, in the defect inspection system of the above aspect, when the printing head is in a position facing the recording area, even if a different signal is detected between at least one adjacent sensor and the other sensor among the plurality of sensors, good night.

Further, in the defect inspection system of the above aspect, the meandering detection unit includes at least one or a plurality of light sources for emitting light toward the film, and a plurality of light-receiving units arranged to face the light source as the sensor, with the film interposed therebetween It is okay to have a small child.

Further, another aspect of the present invention is a film manufacturing apparatus provided with any of the above defect inspection systems.

Further, another aspect of the present invention is a film manufacturing method including a step of inspecting defects using any one of the above defect inspection systems.

Further, another aspect of the present invention is a printing device for printing on a recording area along an edge of a long strip-shaped film while conveying the film, comprising: a printing head for printing on the film; A meandering detection unit for detecting meandering of the film, and a head operating unit for moving the printing head relative to the film in a direction intersecting the transport direction of the film, the meandering of the film detected by the meandering detection unit is provided. Aligned, the head control unit moves the printing head to a position facing the recording area.

Further, in the printing device of the above aspect, the meandering detection unit has a plurality of sensors arranged side by side in a direction crossing the transport direction of the film, and the plurality of sensors are integrated with the printing head by the head operation unit. The moving operation may be performed in a direction crossing the transport direction of the film.

Further, in the printing apparatus of the above aspect, when the printing head is positioned opposite to the recording area, even if a different signal is detected between at least one adjacent sensor and the other sensor among the plurality of sensors, good night.

In the printing device of the above aspect, the meander detection unit may have at least one or a plurality of light sources that emit light toward the film.

Further, another aspect of the present invention is a printing method of printing a recording area along an edge of a long strip-shaped film using a printing head while conveying the film, wherein meandering of the film is detected a step of moving the printing head relative to the film to a position opposite to the recording area in accordance with the detected meandering of the film; and a process of printing the recording area using the printing head. include

Further, in the printing method of the above aspect, using a plurality of sensors arranged side by side in a direction crossing the conveying direction of the film and moving in a direction intersecting the conveying direction of the film integrally with the printing head, You may detect the edge part of a film.

Further, in the printing method of the above aspect, when the printing head is positioned opposite to the recording area, even if a different signal is detected between at least one adjacent sensor and the other sensor among the plurality of sensors good night.

In the printing method of the above aspect, at least one or a plurality of light sources that emit light toward the film may be used.

As described above, according to the aspect of the present invention, even when a meander occurs while conveying a long strip-shaped film, a defect inspection system capable of appropriately printing a recording area along the edge of the film, a film manufacturing apparatus, A film manufacturing method, a printing device, and a printing method can be provided.

1 is a plan view showing an example of a liquid crystal display panel.
FIG. 2 is a cross-sectional view of the liquid crystal display panel shown in FIG. 1 .
3 is a cross-sectional view showing an example of an optical film.
Fig. 4 is a side view showing the construction of a film manufacturing apparatus and a defect inspection system.
5 is a plan view showing the configuration of a double-sided bonding film.
6 shows the configuration of the imprinting device. Fig. 6(a) is a plan view of the printing apparatus seen from the upper side of the film. Fig. 6(b) is a side view of the printing apparatus seen from the conveying direction of the film.
Fig. 7 shows the operation of the printing device shown in Fig. 6; Fig. 7(a) is a side view when the printing head is in a normal position. Fig. 7(b) is a side view when the printing head is outside. Fig. 7(c) is a side view when the printing head is inside.
8 is a side view showing an example of a recording device.
9 shows an example of a cover. 9(a) is a plan view of the cover seen from the upper side of the film. Fig. 9(b) is a side view of the cover seen from the upstream side of the film. Fig. 9(c) is a side view of the cover seen from the outside of the film.
Fig. 10 is a plan view showing a modified example of the cover.
11 shows a variant of the cover. Fig. 11 (a) is a perspective view of the cover. 11(b) is a side view of the cover.
12 shows another embodiment of the cover. Fig. 12 (a) is a plan view of the cover. 12(b) is a side view of the cover.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail with reference to drawings.

In this embodiment, the film manufacturing apparatus which constitutes a part of the production system of an optical display device, and the film manufacturing method using this film manufacturing apparatus are demonstrated.

The film manufacturing apparatus is, for example, a film-type optical member (optical It is a device for producing a film). A film manufacturing device constitutes a part of a production system that produces optical display devices including such optical display components and optical members.

In this embodiment, a transmissive liquid crystal display device is exemplified as an optical display device. A transmissive liquid crystal display device includes a liquid crystal display panel and a backlight. In this liquid crystal display device, an image can be displayed by entering illumination light emitted from the backlight from the back side of the liquid crystal display panel and emitting light modulated by the liquid crystal display panel from the front surface side of the liquid crystal display panel.

(optical display device)

First, the configuration of liquid crystal display panel P shown in Figs. 1 and 2 as an optical display device will be described. Here, FIG. 1 is a plan view showing the structure of the liquid crystal display panel P. As shown in FIG. FIG. 2 is a cross-sectional view of the liquid crystal display panel P along the cutting line A-A shown in FIG. 1 . On the other hand, in FIG. 2, hatching illustration showing a cross section is omitted.

As shown in FIGS. 1 and 2 , the liquid crystal display panel P includes a first substrate P1, a second substrate P2 disposed to face the first substrate P1, and a first substrate ( A liquid crystal layer P3 disposed between P1) and the second substrate P2 is provided.

The first substrate P1 is formed of a transparent substrate having a rectangular shape when viewed in plan. The second substrate P2 is made of a transparent substrate having a relatively smaller rectangular shape than the first substrate P1. The liquid crystal layer P3 is formed by sealing the periphery between the first substrate P1 and the second substrate P2 with a sealant (not shown), and forming a rectangle in plan view surrounded by the sealant. It is placed inside. In the liquid crystal display panel P, a region converging inside the outer periphery of the liquid crystal layer P3 in a plan view is referred to as the display region P4, and an outer region surrounding the periphery of the display region P4 is the frame portion. (G).

On the back surface (backlight side) of the liquid crystal display panel P, a first optical film F11 as a polarizing film and a third optical film F13 as a brightness enhancing film are sequentially laminated and bonded. The 2nd optical film F12 as a polarizing film is bonded to the surface (display surface side) of liquid crystal display panel P. Hereinafter, the first, second, and third optical films F11, F12, and F13 may be collectively referred to as the optical film F1X.

(optical film)

Next, an example of the optical sheet FX constituting the optical film F1X shown in FIG. 3 will be described. Here, FIG. 3 is a sectional view showing the structure of the optical sheet FX. On the other hand, in FIG. 3, illustration of hatching showing a cross section is omitted.

The optical film F1X is obtained by cutting out a sheet piece (chip) of a predetermined length from the long strip-shaped optical sheet (raw material) FX shown in FIG. 3 . Specifically, this optical sheet FX is a substrate sheet through a substrate sheet F4, an adhesive layer F5 provided on one surface of the substrate sheet F4 (upper surface in Fig. 3), and the adhesive layer F5. It has separator sheet F6 provided on one surface of (F4) and surface protection sheet F7 provided on the other surface (lower surface in FIG. 3) of base material sheet F4.

In the case of a polarizing film, for example, the base sheet F4 has a structure in which a pair of protective films F4b and F4c sandwich the polarizer F4a. The adhesion layer F5 is a layer which adheres the sheet piece (optical film F1X) to the liquid crystal display panel P. The separator sheet F6 is a sheet that protects the adhesive layer F5. Separator sheet F6 peels from adhesion layer F5 before bonding a sheet piece (optical film F1X) to liquid crystal display panel P. Hereinafter, the part remove|excluding separator sheet F6 from optical film F1X is called bonding sheet|seat F8. The surface protection sheet F7 is a sheet which protects the surface of the base sheet F4. The surface protection sheet F7 is peeled from the surface of the sheet piece (optical film F1X) after the sheet piece (optical film F1X) is adhered to the liquid crystal display panel P.

In addition, regarding the base material sheet F4, you may abbreviate any one of a pair of protective films F4b and F4c. For example, the protective film F4b on the side of the adhesive layer F5 may be omitted, and the adhesive layer F5 may be directly formed on the polarizer F4a. Further, the protective film F4c on the side of the surface protection sheet F7 is subjected to a surface treatment such as a hard coat treatment to protect the outermost surface of the liquid crystal display panel P or an antiglare treatment to obtain an anti-glare effect, for example. may be carried out. In addition, the base material sheet F4 is not limited to the sheet|seat of the above-mentioned laminated structure, A sheet of a single layer structure may be sufficient. In addition, the surface protection sheet F7 may be omitted.

(Film manufacturing device and film manufacturing method)

Next, the film manufacturing apparatus 100 shown in FIG. 4 is demonstrated. Here, FIG. 4 is a side view showing the structure of the film manufacturing apparatus 100. As shown in FIG.

As shown in FIG. 4 , the film manufacturing apparatus 100 is, for example, a long strip-shaped first film F101 made of a polarizing film, and a long strip-shaped second film F102 made of a surface protection film on one surface. ) After bonding, the long strip-shaped 3rd film F103 used as a surface protection film is bonded to the other surface of the 1st film F101, and the 2nd film F102 is attached to both surfaces of the 1st film F101. and an apparatus for manufacturing the optical film F10X to which the third film F103 is bonded.

Specifically, this film manufacturing apparatus 100 includes a first conveying line 101, a second conveying line 102, a third conveying line 103, a fourth conveying line 104, and a fifth conveying line 105. and a winding section 106.

The 1st conveyance line 101 forms the conveyance route which conveys the 1st film F101. The 2nd conveyance line 102 forms the conveyance route which conveys the 2nd film F102 unwound from the 1st fabric roll R1. The 3rd conveyance line 103 forms the conveyance path which conveys the single-sided bonding film F104 in which the 2nd film F102 was bonded to one surface of the 1st film F101. The 4th conveyance line 104 forms the conveyance path which conveys the 3rd film F103 unwound from the 2nd film roll R2. The 5th conveyance line 105 is the double-sided bonding film F105 in which the 3rd film F103 was bonded to the surface (the other surface of the 1st film F101) on the side of the 1st film F101 of the single-sided bonding film F104. ) (optical film F10X) is formed. And manufactured optical film F10X is wound up by the core material as 3rd fabric roll R3 in the winding-up part 106.

The first conveyance line 101 is, for example, after performing a dyeing treatment, a crosslinking treatment, an stretching treatment, etc. with respect to a film serving as a base material of a polarizer such as PVA (Polyvinyl Alcohol), and then a protective film such as TAC (Triacetylcellulose) on both sides of the film. The long strip-shaped 1st film F101 obtained by bonding is directed toward the 3rd conveyance line 103 and conveyed.

Specifically, in this first conveyance line 101, a pair of first nip rolls 111a, 111b toward the third conveyance line 103 from one side across the upstream side of the third conveyance line 103 And, the 1st accumulator 112 including several 1st dancer rolls 112a and 112b, and the 1st guide roll 113 are arrange|positioned side by side in the horizontal direction.

A pair of 1st nip-roll 111a, 111b is 1st film F101 in the arrow a direction (right direction) shown in FIG. 4 by rotating in a mutually reverse direction, pinching the 1st film F101 in between. withdraw

The 1st accumulator 112 is for reducing the fluctuation|variation of the tension|tensile_strength applied to the 1st film F101 while absorbing the difference by the fluctuation|variation of the conveyance amount of the 1st film F101. Specifically, the first accumulator 112 is between the first nip rolls 111a and 111b and the first guide roll 113, a plurality of dancer rolls 112a located on the upper side and a lower side located on the lower side It has a configuration in which a plurality of dancer rolls 112b are alternately arranged side by side.

In the 1st accumulator 112, while conveying the 1st film F101 in the state where the 1st film F101 was alternately caught by the upper dancer roll 112a and the lower dancer roll 112b, the upper side The dancer roll 112a of the lower side and the dancer roll 112b of the lower side are moved up and down relatively. Thereby, it is becoming possible to accumulate the 1st film F101, without stopping the 1st conveyance line 101. For example, in the 1st accumulator 112, the accumulation|storage of the 1st film F101 can be increased by widening the distance between the upper dancer roll 112a and the lower dancer roll 112b. On the other hand, in the first accumulator 112, the accumulation of the first film F101 can be reduced by narrowing the distance between the dancer roll 112a on the upper side and the dancer roll 112b on the lower side. The 1st accumulator 112 is operated at the time of work, such as splicing after exchanging the core material of fabric rolls R1-R3, for example.

The 1st guide roll 113 guides the 1st film F101 pulled out by 1st nip roll 111a, 111b toward the upstream side of the 3rd conveyance line 103, rotating. In addition, the structure in which the 1st guide roll 113 arrange|positioned not only one but multiple arrangement|positioning may be sufficient as one.

The second conveyance line 102 is, for example, the third conveyance line 103 while unwinding the long strip-shaped second film F102 made of a surface protection film such as PET (Polyethylene terephthalate) from the first fabric roll R1. send it back towards

Specifically, in this second conveyance line 102, a pair of second nip rolls 121a, 121b toward the third conveyance line 103 from the other side with the upstream side of the third conveyance line 103 interposed therebetween and a plurality of second accumulators 122 including a plurality of second dancer rolls 122a and 122b, and a plurality of second guide rolls 123a and 123b are sequentially arranged side by side in the horizontal direction.

A pair of 2nd nip-roll 121a, 121b is 2nd optical film F102 in the arrow b direction (left direction) shown in FIG. 4 by rotating in a mutually reverse direction, pinching the 2nd film F102 in between. ) is withdrawn.

The 2nd accumulator 122 is for absorbing the difference by the fluctuation of the conveyance amount of the 2nd film F102, and reducing the fluctuation|variation of the tension applied to the 2nd film F102. Specifically, the second accumulator 122 is located on the lower side and a plurality of dancer rolls 122a located on the upper side between the second nip rolls 121a and 121b and the second guide rolls 123a and 123b It has a configuration in which a plurality of dancer rolls 122b to do are alternately arranged side by side.

In the 2nd accumulator 122, while conveying the 2nd film F102 in the state where the 2nd film F102 was alternately caught by the upper dancer roll 122a and the lower dancer roll 122b, the upper side The dancer roll 122a of the lower side and the dancer roll 122b of the lower side are moved up and down relatively. This makes it possible to accumulate the second film F102 without stopping the second conveyance line 102 . For example, in the second accumulator 122, the accumulation of the second film F102 can be increased by increasing the distance between the dancer roll 122a on the upper side and the dancer roll 122b on the lower side. On the other hand, in the second accumulator 122, the accumulation of the second film F102 can be reduced by narrowing the distance between the dancer roll 122a on the upper side and the dancer roll 122b on the lower side. The 2nd accumulator 122 is operated at the time of work, such as splicing after exchanging the core material of fabric rolls R1-R3, for example.

The some 2nd guide roll 123a, 123b guides the 2nd film F102 pulled out with the 2nd nip roll 121a, 121b toward the upstream side of the 3rd conveyance line 103, respectively rotating. Moreover, the structure in which 2nd guide roll 123a, 123b was arrange|positioned only one is not limited to the structure arrange|positioned in multiple numbers may be sufficient.

The 3rd conveyance line 103 conveys the long strip-shaped single-sided bonding film F104 which bonded the 2nd film F102 to one surface of the 1st film F101 toward the 5th conveyance line 105.

Specifically, a pair of third nip rolls 131a and 131b are disposed on the third conveyance line 103 . A pair of 3rd nip rolls 131a, 131b is located at the junction of the downstream side of the 1st conveyance line 101 and the downstream side of the 2nd conveyance line 102, and the 1st film F101 and By rotating in a mutually reverse direction while sandwiching the 2nd film F102, the single-sided bonding film F104 which bonded the 1st film F101 and the 2nd film F102 to the arrow c direction (downward direction) shown in FIG. withdraw

The fourth conveyance line 104 is, for example, the fifth conveyance line 105 while unwinding the long strip-shaped third film F103 made of a surface protection film such as PET (Polyethylene terephthalate) from the second fabric roll R2. send it back towards

Specifically, in this fourth conveyance line 104, from one side across the downstream side of the third conveyance line 103 toward the third conveyance line 103, a pair of fourth nip rolls 141a, 141b and a plurality of third accumulators 142 including a plurality of third dancer rolls 142a and 142b, and a plurality of fourth guide rolls 143a and 143b are sequentially arranged side by side in the horizontal direction.

A pair of 4th nip roll 141a, 141b is 3rd film F103 in the arrow d direction (right direction) shown in FIG. 4 by rotating in a mutually reverse direction, pinching the 3rd film F103 in between. withdraw

The 3rd accumulator 142 is for absorbing the difference by the fluctuation|variation of the transfer amount of the 3rd film F103, and reducing the fluctuation|variation of the tension applied to the 3rd film F103. Specifically, the third accumulator 142 is located on the lower side and a plurality of dancer rolls 142a located on the upper side between the fourth nip rolls 141a and 141b and the fourth guide rolls 143a and 143b It has a configuration in which a plurality of dancer rolls 142b to do are alternately arranged side by side.

In the 3rd accumulator 142, while conveying the 3rd film F103 in the state where the 3rd film F103 was alternately caught by the upper dancer roll 142a and the lower dancer roll 142b, the upper side The upper and lower dancer rolls 142a and the lower side dancer rolls 142b are moved up and down relatively. Thereby, it is becoming possible to accumulate|store the 3rd film F103, without stopping the 4th conveyance line 104. For example, in the third accumulator 142, the accumulation of the third film F103 can be increased by increasing the distance between the dancer roll 142a on the upper side and the dancer roll 142b on the lower side. On the other hand, in the third accumulator 142, the accumulation of the third film F103 can be reduced by narrowing the distance between the dancer roll 142a on the upper side and the dancer roll 142b on the lower side. The 3rd accumulator 142 is operated at the time of work, such as splicing after exchanging the core material of fabric rolls R1-R3, for example.

A plurality of 4th guide rolls 143a and 143b, the 3rd film F103 pulled out by the 4th nip rolls 141a and 141b while rotating, respectively, the downstream side of the 3rd conveyance line 103 (5th conveyance upstream of line 105). In addition, the structure in which 4th guide roll 143a, 143b was arrange|positioned not only in multiple arrangements, but one may be sufficient.

The 5th conveyance line 105 is long strip shape which bonded the 3rd film F103 to the surface (the other surface of the 1st film F101) on the side of the 1st film F101 of the single-sided bonding film F104. The double-sided bonding film F105 (optical film F10X) is directed toward the third film roll R3 and conveyed.

Specifically, in this 5th conveyance line 105, a pair of 5th nip rolls 151a, 151b toward the 3rd fabric roll R3 from the other side across the downstream side of the 3rd conveyance line 103, And, the fourth accumulator 152 including a fifth guide roll 153a, a pair of sixth nip rolls 151c and 151d, and a plurality of fourth dancer rolls 152a and 152b, and a sixth guide The rolls 153b are sequentially arranged in a horizontal direction.

A pair of 5th nip rolls 151a, 151b are located at the junction of the downstream side of the 3rd conveyance line 103 and the upstream side of the 5th conveyance line 105, and the single-sided bonding film F104 and The double-sided bonding film F105 which bonded the single-sided bonding film F104 and the 3rd film F103 to the direction of the arrow e shown in FIG. 4 (downward direction) by rotating in a mutually reverse direction while pinching the 3rd film F103 withdraw

The 5th guide roll 153a guides the double-sided bonding film F105 pulled out by 5th nip roll 151a, 151b toward the 4th accumulator 152, rotating. In addition, the 5th guide roll 153a may be arranged not only in the structure where only one was arrange|positioned, but multiple arrangements.

A pair of 6th nip roll 151c, 151d rotates in a mutually reverse direction, pinching|interposing double-sided bonding film F105 in between, and is double-sided bonding optical film F105 in the direction of arrow f shown in FIG. 4 (right direction) ) is to withdraw.

In the 4th accumulator 152, the upper side while conveying the double-sided bonding film F105 in the state where the double-sided bonding film F105 was alternately hung by the dancer roll 152a of the upper side and the dancer roll 152b of the lower side, The dancer roll 152a of the lower side and the dancer roll 152b of the lower side are moved up and down relatively. Thereby, it is becoming possible to accumulate|store the double-sided bonding film F105, without stopping the 5th conveyance line 105. For example, in the 4th accumulator 152, accumulation|storage of the double-sided bonding film F105 can be increased by widening the distance between the upper dancer roll 152a and the lower dancer roll 152b. On the other hand, in the 4th accumulator 152, accumulation|storage of the double-sided bonding film F105 can be reduced by narrowing the distance between the dancer roll 152a of the upper side, and the dancer roll 152b of the lower side. The 4th accumulator 152 is operated at the time of work, such as splicing after exchanging the core material of fabric rolls R1-R3, for example.

The 6th guide roll 153b guides the double-sided bonding film F105 toward 3rd original fabric roll R3. In addition, the 6th guide roll 153b may be not limited to the structure arrange|positioned only one, but the structure arrange|positioned in multiple numbers may be sufficient as it.

The double-sided bonding film F105 is sent to the next process, after being wound up by a core material as 3rd original fabric roll R3 of optical film F10X in the winding-up part 106.

(defect inspection system)

Next, the defect inspection system 10 provided in the film manufacturing apparatus 100 will be described.

As shown in FIG. 4, the defect inspection system 10 includes a conveyance line L, a first defect inspection device 11, a second defect inspection device 12, a recording device 13, and a first measuring device. (14), a second measuring instrument (15), and a control device (16).

The conveying line L forms a conveying path for conveying a film to be inspected. In this embodiment, the conveyance line L is comprised by the said 1st conveyance line 101, the 3rd conveyance line 103, and the 5th conveyance line 105.

The 1st defect inspection apparatus 11 inspects the defect of the 1st film F101 before the 2nd film F102 and the 3rd film F103 are bonded. Concretely, this 1st defect inspection apparatus 11 detects various defects, such as a foreign material defect, a concavo-convex defect, and a bright spot defect, which arose when manufacturing the 1st film F101 or conveying the 1st film F101. The 1st defect inspection apparatus 11 performs inspection processing, such as reflection inspection, transmission inspection, oblique transmission inspection, orthogonal Nicols transmission inspection, etc., for the 1st film F101 conveyed by the 1st conveyance line 101, for example. By executing, the defect of the 1st film F101 is detected.

The 1st defect inspection apparatus 11 is some illumination part 21a which irradiates illumination light to the 1st film F101 in the upstream side rather than 1st nip-roll 111a, 111b in the 1st conveyance line 101, 22a, 23a), and a plurality of photodetector parts 21b, 22b, 23b for detecting light transmitted through the first film F101 (transmitted light) or reflected light from the first film F101 (reflected light). .

In the present embodiment, for the configuration of detecting the transmitted light, a plurality of lighting units 21a, 22a, 23a and photodetector units 21b, 22b, 23b arranged in parallel in the conveying direction of the first film F101 are respectively provided for the first film ( F101) are placed opposite to each other with interposed between them. In addition, in the 1st defect inspection apparatus 11, it is not limited to the structure which detects such a transmitted light, and a structure which detects reflected light, or a structure which detects transmitted light and reflected light may be sufficient. In the case of detecting the reflected light, the photodetectors 21b, 22b, and 23b may be disposed on the side of the lighting units 21a, 22a, and 23a.

Illumination part 21a, 22a, 23a irradiates the 1st film F101 with illumination light whose light intensity, wavelength, polarization state, etc. were adjusted according to the type of defect inspection. The photodetectors 21b, 22b, and 23b capture an image of the position where the illumination light of the first film F101 is irradiated using an imaging device such as a CCD. Images (defect inspection results) picked up by the photodetectors 21b, 22b, and 23b are output to the control device 16.

The 2nd defect inspection apparatus 12 inspects the defect of the 1st film F101 after the 2nd film F102 and the 3rd film F103 were bonded, ie, the double-sided bonding film F105. Specifically, this 2nd defect inspection apparatus 12 is used when bonding the 2nd film F102 and the 3rd film F103 to the 1st film F101, or the single-sided bonding film F104 and the double-sided bonding film F105 Various defects such as foreign matter defects, concavo-convex defects, bright point defects, etc., which occurred during conveyance are detected. The 2nd defect inspection apparatus 12 performs inspection processing, such as reflection inspection, transmission inspection, oblique transmission inspection, orthogonal Nicols transmission inspection, etc., for the double-sided bonding film F105 conveyed by the 5th conveyance line 105, for example. The defect of double-sided bonding film F105 is detected by carrying out.

The 2nd defect inspection apparatus 12 is some illumination part 24a which irradiates illumination light to the double-sided bonding film F105 downstream rather than 5th nip-roll 151a, 151b in the 5th conveyance line 105, 25a) and a plurality of photodetector parts 24b and 25b for detecting the light transmitted through the double-sided bonding film F105 (transmitted light) or the light reflected by the double-sided bonding film F105 (reflected light).

In this embodiment, for the structure which detects transmitted light, the some lighting part 24a, 25a and light detection part 24b, 25b which are parallel in the conveyance direction of double-sided bonding film F105 each hold double-sided bonding film F105 between them. are placed opposite to each other. Moreover, in the 2nd defect inspection apparatus 12, it is not limited to the structure which detects such a transmitted light, and a structure which detects reflected light, or a structure which detects transmitted light and reflected light may be sufficient. In the case of detecting the reflected light, the photodetectors 24b and 25b may be disposed on the side of the lighting units 24a and 25a.

Illumination part 24a, 25a irradiates the double-sided bonding film F105 with the illumination light whose light intensity, wavelength, polarization state, etc. were adjusted according to the kind of defect inspection. Photodetection part 24b, 25b images the image of the position to which the illumination light of the double-sided bonding film F105 was irradiated using imaging elements, such as CCD. Images (defect inspection results) picked up by the photodetectors 24b and 25b are output to the control device 16 .

The recording device 13 records defect information based on the defect inspection results of the first defect inspection device 11 and the second defect inspection device 12 on the double-sided bonding film F105 (printing device). Specifically, the defect information includes information about the location or type of the defect, and is recorded (printed) as an identification code such as a character, barcode, or two-dimensional code (DataMatrix code, QR code (registered trademark), etc.), for example. The identification code indicates, for example, the location where the defect detected by the first defect inspection device 11 and the second defect inspection device 12 exists at a distance along the film width direction from the location where the identification code is printed. Information (information about the location of the defect) is included. In addition, the identification code may contain information regarding the type of detected defect. In this embodiment, a 7 mm x 7 mm two-dimensional code is printed as defect information.

The recording device 13 is provided downstream of the second defect inspection device 12 in the fifth conveyance line 105 . The recording device 13 has a printing head 13a employing, for example, an inkjet method. Moreover, the 7th guide roll 153c which contact|connects double-sided bonding film F105 is arrange|positioned at the position facing the printing head 13a. And this printing head 13a discharges ink to the recording area along the edge part of the width direction of the double-sided bonding film F105 on the opposite side from the position which contacts the 7th guide roll 153c of the double-sided bonding film F105. Thus, the defect information is printed.

Here, as the double-sided bonding film F105 is shown in FIG. 5, the 2nd film F102 and the 3rd film F103 are formed wider than the 1st film F101, and the 2nd film F102 and It has a configuration in which blank areas Ma made of the second film F102 and the third film F103 are provided on both sides of the width direction of the first film F101 sandwiched between the third films F103.

The blank area Ma is located outside the area where the first film F101 is disposed, that is, the area functioning as a polarizing film (hereinafter referred to as a polarizing area) (Pa), and the double-sided bonding film F105 is placed as described above. When bonded to the liquid crystal display panel P, it is located outside the area overlapping the display area P4 of this liquid crystal display panel P. In addition, the blank area Ma is an area that is cut and removed before bonding to the liquid crystal display panel P.

The recording device 13 records defect information in the blank area Ma separated by a fixed distance from the boundary B between the polarization area Pa of the double-sided bonding film F105 and the blank area Ma. Therefore, the area where the defect information is recorded in this blank area Ma is set as the recording area S. Moreover, in this embodiment, the recording area|region S is provided in the blank area|region Ma in one side of the width direction of double-sided bonding film F105.

In addition, even if the recording device 13 prints (marking) a dot-shaped, line-shaped, or frame-shaped mark of a size including the defect on the defective portion of the double-sided bonding film F105, even if it directly records on the defective portion. good night. At this time, other than the mark, information on the type of defect may be recorded by printing a symbol or pattern representing the type of defect on the defect site.

The first length measuring device 14 and the second length measuring device 15 measure the conveyance amount of the first film F101. Specifically, in this embodiment, the rotary encoder constituting the first lengthening machine 14 is provided on the first nip roll 111a on the upstream side of the first accumulator 112 in the first conveyance line 101, and The rotary encoder constituting the second length measuring machine 15 is disposed on the third nip roll 131a on the downstream side of one accumulator 112 .

The first lengthening machine 14 and the second lengthening machine 15 have rotary encoders according to the amount of rotational displacement of the first nip roll 111a and the third nip roll 131a rotating in contact with the first film F101. The conveyance amount of the 1st film F101 is measured. The measurement results of the first measuring instrument 14 and the second measuring instrument 15 are output to the control device 16 .

In this embodiment, since there is only one accumulator between the first defect inspection device 11 and the recording device 13, one length measuring device is disposed on the upstream side and the downstream side of this accumulator. On the other hand, when there are a plurality of accumulators between the first defect inspection device 11 and the recording device 13, the length measuring device is located on the upstream side of the most upstream accumulator and on the downstream side of the most downstream accumulator. should be placed one by one.

The control device 16 collectively controls each part of the film production device 100 . Specifically, this control device 16 has a computer system as an electronic control device. A computer system generally includes an arithmetic processing unit such as a CPU and an information storage unit such as a memory or a hard disk.

In the information storage unit of the control device 16, an operating system (OS) that controls the computer system and a program for executing various processes in each unit of the film manufacturing apparatus 100 are recorded in the arithmetic processing unit. In addition, the control device 16 may include a logic circuit such as an ASIC that performs various processes necessary for controlling each part of the film manufacturing device 100 . In addition, the control device 16 includes an interface for input/output with an external device of the computer system. An input device such as a keyboard or mouse, a display device such as a liquid crystal display, a communication device, and the like can be connected to this interface, for example.

The control device 16 analyzes the images captured by the photodetectors 21b, 22b, 23b and the photodetectors 24b, 25b to determine the presence (position) or type of defects. The control apparatus 16 controls the recording apparatus 13, and records defect information in the double-sided bonding film F105, when it determines with the 1st film F101 or the double-sided bonding film F105 having a defect.

In the defect inspection system 10, defect information is recorded at a predetermined timing after the defect inspection so that a shift does not occur between the defect inspection position of the double-sided bonding film F105 and the information recording position of the defect information. For example, in this embodiment, after the time at which the defect inspection by the first defect inspection device 11 or the second defect inspection device 12 is performed, the conveyance amount of the film conveyed on the conveyance line L is calculated, and the calculation is performed. Recording is performed by the recording device 13 when the conveyed amount coincides with the offset distance.

Here, the offset distance refers to the transport distance of the film between the first defect inspection device 11 and the second defect inspection device 12 and the recording device 13 . Strictly speaking, the offset distance is the distance between the positions where defect inspection is performed by the first defect inspection device 11 and the second defect inspection device 12 (defect inspection position) and the defect information recorded by the recording device 13. is defined as the conveying distance of the film between positions (information recording positions). Also, the offset distance is changed when the first accumulator 112 is operated.

The offset distance at the time of non-operation of the first accumulator 112 (hereinafter, referred to as the first offset distance) is stored in advance in the information storage unit of the control device 16 . Specifically, a plurality of photodetectors 21b, 22b, 23b and photodetectors 24b, 25b exist in the first defect inspection device 11 and the second defect inspection device 12, so that the photodetectors 21b, 22b , 23b, 24b, 25b), a defect inspection is performed. For this reason, the 1st offset distance is memorize|stored in the information storage part of the control apparatus 16 for each photodetector part 21b, 22b, 23b, 24b, 25b.

When the offset distance fluctuates due to the operation of the first accumulator 112, the correction value of the offset distance is based on the difference between the amount of conveyance of the first film F101 on the upstream side and the downstream side of the first accumulator 112. yield That is, the control device 16 calculates the accumulated amount of the first film F101 by the first accumulator 112 from the measurement results of the first length measuring device 14 and the second length measuring device 15, and this The correction value of the offset distance is calculated based on the accumulated amount of one film (F101).

In the defect inspection system 10, when the first accumulator 112 is operating, the timing at which the recording device 13 records defect information is corrected based on the correction value of the offset distance. For example, in this embodiment, the correction value of the offset distance is calculated based on the measurement results of the first length measuring instrument 14 and the second measuring instrument 15. The control device 16 calculates an offset distance (hereinafter referred to as a second offset distance) at the time of operation of the first accumulator 112 based on the correction value and the first offset distance.

In this embodiment, the time at which the defect inspection by the first defect inspection device 11 and the second defect inspection device 12 was performed based on the measurement results of the first length measuring device 14 or the second length measuring device 15 After that, the conveyance amount of the film conveyed on the conveyance line L is calculated, and recording is performed by the recording device 13 when the calculated conveyance amount coincides with the second offset distance.

In addition, in this embodiment, at the time of operation of the 1st accumulator 112, information indicating that the 1st accumulator 112 operated separately from defect information (hereinafter referred to as accumulator operation information.) is attached to the double-sided bonding film F105. may be recorded in In the case where the accumulator operation information is recorded, a misalignment of the recording position or the like can be detected by the operator carefully examining the defective part of the part to which the accumulator operation information is attached. As a result, the possibility of erroneously determining a non-defective part as a defective part is reduced, and the yield is improved.

By the way, in the defect inspection system 10 of the present embodiment, the state of the double-sided bonding film F105 (for example, curl at the end of the film, shift at the time of bonding the film, unevenness in thickness in the film width direction, etc.) and transport conditions (for example, , alignment misalignment of rolls, shift in tension balance applied in the film width direction, etc.), etc., meandering occurred in the double-sided bonding film F105 during conveyance. When such a meandering occurs in the double-sided bonding film F105, the defect information printed by the ink discharged from the printing head 13a is not clearly recorded in the recording area along the edge of the double-sided bonding film F105, resulting in a printing miss. There is a possibility to throw it away.

In addition, when the direction of "meandering" sees the surface of double-sided bonding film F105 from upper direction, it is the left-right direction (cross direction) of double-sided bonding film F105. With "meandering" of the double-sided bonding film F105 during conveyance, for example, when the surface of the double-sided bonding film F105 is viewed from above, while the double-sided bonding film F105 twists in the left-right direction (width direction), the double-sided bonding film ( F105) means moving in the conveying direction.

On the other hand, in this embodiment, while conveying double-sided bonding film F105 by using the printing device 50 as shown in FIG.6 (a), FIG.6 (b) as said recording device 13 Even if it is a case where meandering occurs, printing can be appropriately performed in the recording area S along the edge of the double-sided bonding film F105.

(Printing device and printing method)

Hereinafter, a specific configuration of the printing device 50 of the present embodiment and a specific printing method using the printing device 50 will be described. Here, FIG.6 (a) is a top view which shows arrangement|positioning of the printing apparatus 50 with respect to the double-sided bonding film F105. Fig.6(b) is a side view which shows arrangement|positioning of the printing apparatus 50 with respect to the double-sided bonding film F105.

The printing apparatus 50 moves the printing head 13a in the direction (width direction) which intersects the conveyance direction of the double-sided bonding film F105, as shown to FIG.6(a), FIG.6(b). It has a head operation part 51 to operate.

The head operating unit 51 has a support frame 52 supporting the printing head 13a. The support frame 52 includes an upper arm 52a disposed facing the upper surface of the double-sided bonding film F105, a lower arm 52b disposed facing the lower surface of the double-sided bonding film F105, and a double-sided bonding film. It is arrange|positioned on the outer side of (F105), and has the connection part 52c which connects between the upper arm 52a and the lower arm 52b. The upper arm 52a and the lower arm 52b extend in the width direction of the double-sided bonding film F105 in a mutually opposed state, and are provided. The connecting portion 52c is provided extending in the up-and-down direction, and connects the proximal ends of the upper arm 52a and the lower arm 52b. The printing head 13a is attached to the upper arm 52a.

The support frame 52 is slidably supported in the width direction of the double-sided bonding film F105. In addition, the head operation part 51 has a slide driving part (not shown). The slide drive part converts the rotation drive of a drive motor into linear drive via a gear or a rack, and slides the support frame 52 in the width direction of double-sided bonding film F105. Thereby, the printing head 13a is slide-driven in the width direction of the double-sided bonding film F105 integrally with the support frame 52.

The recording device 13 has the meandering detection part 53 which detects the meandering of double-sided bonding film F105. The meandering detection unit 53 includes a plurality of (two in this embodiment) light sources 54a and 54b that emit light toward the double-sided bonding film F105 and a plurality of light sources 54a and 54b that receive light emitted from the light sources 54a and 54b. It has sensors 55a and 55b (two in this embodiment).

A plurality of light sources 54a and 54b are attached to the upper arm 52a. The plurality of light sources 54a and 54b are located closer to the tip side of the upper arm 52a than the printing head 13a, and arranged side by side in the extension direction of the upper arm 52a (the width direction of the double-sided bonding film F105). has been

Among them, the light source on the side (one side) closer to the printing head 13a is the first light source 54a, and the light source on the side (the other side) farther from the printing head 13a is the second light source 54b. Each of the light sources 54a and 54b includes a light emitting diode (LED) that emits infrared (IR) light, which may be visible light or infrared light, as long as the light sources 54a and 54b have different transmittances when passing through the polarization region Pa and the blank region Ma. A light emitting element such as the like can be used.

A plurality of sensors 55a and 55b are attached to the lower arm 52b. The plurality of sensors 55a and 55b are arranged side by side in the extension direction of the upper arm 52a (the width direction of the double-sided bonding film F105) so as to face the plurality of light sources 54a and 54b. Among them, the sensor on the side (one side) facing the first light source 54a is the first sensor 55a, and the sensor on the side (the other side) facing the second light source 54b is the second sensor 55b. is doing A light-receiving element such as a photodiode (PD) can be used for each of the sensors 54a and 54b.

In the meander detection unit 53, the first sensor 55a receives the light emitted from the first light source 54a, and the second sensor 55b receives the light emitted from the second light source 54b. Some light source 54a, 54b and some sensor 55a, 55b are arrange|positioned in the same row as printing head 13a in the conveyance direction of double-sided bonding film F105, or rather downstream than printing head 13a are placed Moreover, some light source 54a, 54b and some sensor 55a, 55b are moved and operated integrally with printing head 13a by the head operation part 51 in the width direction of double-sided bonding film F105.

In the printing device 50 having the above structures, the head operation unit 51 moves the printing head 13a to the recording area S in accordance with the meandering of the double-sided bonding film F105 detected by the meandering detection unit 53. move to the opposite position.

Here, as shown in FIGS. 7(a) to 7(c), when meandering occurs in the double-sided bonding film F105 during conveyance, the printing head 13a to the position facing the recording area S. The specific operation of moving will be described.

Fig. 7(a) is a case where the printing head 13a is in a position facing the recording area S (hereinafter referred to as a normal position). In this case, in the width direction of the double-sided bonding film F105, between the 1st sensor 55a and the 2nd sensor 55b, the polarization area|region Pa of the double-sided bonding film F105 and blank area|region Ma The boundary (B) of is located.

Therefore, in the meander detection unit 53, the light BL1 emitted from the first light source 54a passes through the blank area Ma and is received by the first sensor 55a. Meanwhile, the light BL2 emitted from the second light source 54b passes through the polarization region Pa and is received by the second sensor 55b.

In this embodiment, the same light-emitting element is used for the first light source 54a and the second light source 54b, and the same light-receiving element is used for the first sensor 55a and the second sensor 55b. In this case, since the light transmittance is lower in the polarization area Pa than in the blank area Ma, the light reception amount (signal) of the first sensor 55a becomes high (Hi), and the light reception amount of the second sensor 55b ( signal) becomes Lo.

When such a signal is detected, in the head operation part 51, it is judged that the printing head 13a is in a normal position, and the position of the printing head 13a in the width direction of the double-sided bonding film F105 is maintained.

Fig.7 (b) is a case where the printing head 13a exists outside the normal position by meandering of double-sided bonding film F105. In this case, in the width direction of the double-sided bonding film F105, the first sensor 55a and the second sensor 55b are the boundary between the polarization area Pa and blank area Ma of the double-sided bonding film F105 ( It is located outside of B).

Therefore, in the meander detection unit 53, the light BL1 emitted from the first light source 54a passes through the blank area Ma and is received by the first sensor 55a. Similarly, the light BL2 emitted from the second light source 54b passes through the blank area Ma and is received by the second sensor 55b. In this case, the light reception amount (signal) of the first sensor 55a becomes high (Hi), and the light reception amount (signal) of the second sensor 55b becomes high (Hi).

When such a signal is detected, in the head operation part 51, it is judged that the printing head 13a exists outside the normal position, and the printing head 13a is moved inside the width direction of the double-sided bonding film F105. And the position of the printing head 13a in the width direction of the double-sided bonding film F105 is maintained at the time of judging that the printing head 13a is in a normal position from the signal which the meander detection part 53 detected.

Fig.7 (c) is a case where the printing head 13a exists inside rather than a normal position by meandering of double-sided bonding film F105. In this case, in the width direction of the double-sided bonding film F105, the first sensor 55a and the second sensor 55b are the boundary between the polarization area Pa and blank area Ma of the double-sided bonding film F105 ( It is located on the inner side of B).

Therefore, in the meander detection unit 53, the light BL1 emitted from the first light source 54a passes through the polarization region Pa and is received by the first sensor 55a. Similarly, the light BL2 emitted from the second light source 54b passes through the polarization region Pa and is received by the second sensor 55b. In this case, the light reception amount (signal) of the first sensor 55a becomes low (Lo), and the light reception amount (signal) of the second sensor 55b becomes low (Lo).

When such a signal is detected, in the head operation part 51, it judges that the printing head 13a exists inside rather than a normal position, and moves the printing head 13a to the width direction outer side of the double-sided bonding film F105. And the position of the printing head 13a in the width direction of the double-sided bonding film F105 is maintained at the time of judging that the printing head 13a is in a normal position from the signal which the meander detection part 53 detected.

Determination of the different thing (large or small) of the received light amount (signal) received by the 1st sensor 55a and the 2nd sensor 55b can be selected suitably by the structure of double-sided bonding film F105. For example, if the received light amounts in the polarization area Pa and the blank area Ma are A(Pa) and A(Ma), the value of {A(Pa)-A(Ma)} ÷ 2 is used as the threshold , The difference between the threshold value and the light reception amount between the two sensors 55a and 55b is compared, and if the difference in light reception amount is greater than the threshold value, the light reception amount (signal) detected between the two sensors 55a and 55b is different, and the light reception amount ( Signal) can be set to high (Hi) and low (Lo).

The distance between adjacent sensors 55a and 55b is usually within the range of 1/3 to 1/2 the width of the recording area S in order to be smaller than the width of the recording area S. It is desirable to do

If the space|interval of adjacent sensor 55a, 55b comrades exists in this range, the printing head 13a can be stably maintained with respect to the meandering of the double-sided bonding film F105 at the position facing the recording area S. For example, when a 7 mm × 7 mm two-dimensional code of the present embodiment is printed in a recording area S having a width of 10 mm, the distance between adjacent sensors 55a and 55b can be set to 3 mm to 5 mm. .

In addition, the number of sensors to be arranged is usually about 2 to 6, and as the number increases, the printing head 13a can be held at a position facing the recording area S with high precision. On the other hand, if the number of sensors is too large, the meander detection unit 53 becomes large relative to the recording area S, resulting in an unnecessary space. Therefore, it is preferable to set the number of sensors to 2 to 4.

In the printing method of this embodiment, the meandering of double-sided bonding film F105 is detected by using the printing apparatus 50 mentioned above, and printing head 13a is set according to the meandering of the said detected double-sided bonding film F105. After moving to a position facing the recording area S, printing can be performed on the recording area S using this printing head 13a.

As described above, in the defect inspection system 10 of this embodiment, even when meandering occurs in the double-sided bonding film F105 during conveyance, defect information is appropriately recorded in the recording area S of the double-sided bonding film F105 ( arguments) can be done. Thereby, in the film manufacturing apparatus 100 of this embodiment, the optical film F10X is cut out with good yield from the double-sided bonding film F105, preventing generation|occurrence|production of the reading error of defect information by a printing mistake, and high-quality optics A film (F10X) can be manufactured.

By the way, in the defect inspection system 10 of this embodiment, fluctuations occurred in the double-sided bonding film F105 during conveyance depending on the state of the double-sided bonding film F105, conveyance conditions, etc., in some cases. In particular, at both ends of the width direction of the double-sided bonding film F105, curling easily occurs depending on moisture absorption of the film, drying conditions, etc., and this curling is considered to be one of the causes of fluctuations during conveyance.

On the other hand, in the defect inspection system 10 of this embodiment, as shown in FIG. 8, the printing head 13a is disposed facing the seventh guide roll 153c in contact with the double-sided bonding film F105 described above. have.

Thereby, even if it is a case where fluctuations arise at both ends of the width direction of the double-sided bonding film F105 during conveyance, the fluctuation of the double-sided bonding film F105 is suppressed at the position in contact with the 7th guide roll 153c. For this reason, in the defect inspection system 10 of this embodiment, the defect information printed by the ink i discharged from the printing head 13a is appropriately recorded in the recording area S of the double-sided bonding film F105 ( arguments) can be done.

Moreover, it is preferable that the double-sided bonding film F105 hangs over the outer peripheral surface of the 7th guide roll 153c in the angular range of 40 degrees - 130 degrees (henceforth a holding angle θ). Here, the holding angle as used in this embodiment says what expressed the angular range which contacts the outer peripheral surface of the guide roll of a film in the circumferential direction by the central angle of a guide roll.

When the holding angle θ is less than 40°, the double-sided bonding film F105 becomes easy to slide on the outer circumferential surface of the seventh guide roll 153c. Therefore, in order to prevent a scratch or the like from occurring due to sliding of the double-sided bonding film F105, it is preferable to make the holding angle θ 40° or more. On the other hand, when the holding angle θ exceeds 130°, bubbles easily engage each other between the second and third films F102 and F103 serving as surface protection films and the first film F101, for example.

Therefore, in order to prevent these bubbles from being engaged with each other, it is preferable to set the holding angle θ to 130° or less.

Moreover, when the tension|tensile_strength applied to double-sided bonding film F105 is low, it is preferable to make holding angle (theta) more than 90 degrees, and it is more preferable to set it as 95 degrees or more. Thereby, the fluctuation|fluctuation which arises in double-sided bonding film F105 can be suppressed. On the other hand, when the tension applied to the double-sided bonding film F105 is high, the holding angle θ is preferably less than 90°, and more preferably 85° or less. Accordingly, the double-sided bonding film F105 can be prevented from excessively adhering to the outer circumferential surface of the seventh guide roll 153c.

Moreover, about the conveyance speed of double-sided bonding film F105, it is normally about 9-50 m/min. In addition, the tension applied to the double-sided bonding film F105 is about 400 to 1500 N within the drying furnace and about 200 to 500 N outside the drying furnace. Moreover, fluctuation|oscillation becomes easy to arise, so that the tension|tensile_strength applied to double-sided bonding film F105 is small. The width of the double-sided bonding film F105 is about 500 to 1500 mm. Moreover, fluctuation|fluctuation becomes easy to arise, so that the width|variety of double-sided bonding film F105 becomes large. The thickness of the double-sided bonding film F105 is about 10 to 300 μm. Moreover, a fluctuation becomes easy to arise, so that the thickness of double-sided bonding film F105 becomes thin.

In addition, it is preferable to make the outer diameter of the 7th guide roll 153c into the range of 100-150 mm. When the outer diameter of the 7th guide roll 153c becomes large, the area of the double-sided bonding film F105 contacting the outer peripheral surface of the 7th guide roll 153c with respect to the holding angle (theta) becomes large. For this reason, the fluctuation|fluctuation which arises in the double-sided bonding film F105 can be suppressed and the recording area|region S can be stabilized more. However, when the outer diameter of the 7th guide roll 153c becomes large, since the above-mentioned scratches and meshing of air bubbles become easy to occur, it is preferable to set it as the said range.

In addition, as the roundness of the seventh guide roll 153c is higher, vibration of the double-sided bonding film F105 in contact with the seventh guide roll 153c can be suppressed so that the recording area S can be more stabilized. Specifically, the roundness of the seventh guide roll 153c is preferably 1.0 mm or less, and more preferably 0.5 mm or less.

Moreover, it is preferable to set it as 100 s or less, and, as for the surface roughness (maximum roughness Ry) in the outer peripheral surface of the 7th guide roll 153c, it is more preferable to set it as 25 s or less. Thereby, generation|occurrence|production of the above-mentioned scratch or bubble meshing can be suppressed.

Moreover, in the defect inspection system 10 of this embodiment, in order to suppress the fluctuation|fluctuation which arises in the double-sided bonding film F105 also on the upstream side and the downstream side of the 7th guide roll 153c, the guide roll which contacts double-sided bonding film F105 It is possible to add In this case, it is preferable that the distance between the additional guide roll and the seventh guide roll 153c is within 1000 mm. Moreover, it is also possible to give double-sided bonding film F105 a holding angle with respect to the guide roll to add. The holding angle is preferably given to the guide rolls added on the upstream side, and more preferably given to the guide rolls added to the upstream and downstream sides.

As described above, in the defect inspection system 10 of the present embodiment, it is possible to reduce the influence due to fluctuations occurring in the double-sided bonding film F105 during conveyance, and record (print) defect information appropriately in the double-sided bonding film F105. can Accordingly, in the film manufacturing apparatus 100 of the present embodiment, the optical film F10X is cut out with good yield from the double-sided bonding film F105 while preventing the occurrence of a reading error of defect information due to a printing mistake, and a high-quality optical film ( F10X) is possible.

In the recording device 13 in the present embodiment, as shown in Figs. 9(a) to 9(c), the ink (i) in the region at least inside the recording region S of the double-sided bonding film F105 ) is provided with a cover 30 that prevents attachment. Here, Fig.9 (a) is the top view which looked at the cover 30 from the upper side of double-sided bonding film F105, and FIG.9(b) shows the cover 30 from the upstream side of the conveyance direction of double-sided bonding film F105. It is this side view, and FIG.9(c) is the side view which looked at the cover 30 from the outer side of double-sided bonding film F105.

Specifically, in the space K where the double-sided bonding film F105 and the printing head 13a oppose, this cover 30 covers the side facing the inside of the double-sided bonding film F105, and the first side plate part 30a ) And the 2nd side board part 30b which covers the side facing the upstream side of the conveyance direction of the double-sided bonding film F105, and the 3rd which covers the side facing the downstream side of the conveyance direction of the double-sided bonding film F105. It has side plate part 30c.

The cover 30 is detachably attached to the printing head 13a using means such as screw fixing. Since the side facing the outer side of the double-sided bonding film F105 is opened in the space K of the cover 30, attachment and detachment to the printing head 13a are easy.

As for the cover 30, it is preferable that the space|interval T between the surface which faces double-sided bonding film F105 and the surface of double-sided bonding film F105 is 1 mm or less. By setting this interval T to 1 mm or less, when the ink i discharged from the printing head 13a scatters to the surroundings, the scattering of the ink i is prevented from scattering to the outside of the cover 30. It can be prevented.

Incidentally, as a scattering product of the ink i, among the ink i ejected from the printing head 13, for example, the ink i displaced from the information recording position and scattered to the surroundings or after adhering to the double-sided bonding film F105. There is ink (i) scattered around, and the like.

Among the three side plate parts 30a, 30b, and 30c constituting the cover 30, the first side plate part 30a has the ratio of ink i in the area overlapping the display area P4 of the double-sided bonding film F105. This prevents product from adhering. On the other hand, the 2nd side plate part 30b is preventing that the flying material of the ink i adheres to the upstream side of the conveyance direction of the double-sided bonding film F105. On the other hand, the 3rd side plate part 30c is preventing that the flying material of the ink i adheres to the downstream side of the conveyance direction of the double-sided bonding film F105.

Splashes of the ink (i) adhere to the inner surface of the cover (30). Therefore, the cover 30 can be periodically peeled off from the printing head 13a, washed, and then attached to the printing head 13a for repeated use.

Moreover, it is preferable to set the film manufacturing apparatus 100 as the structure provided with the static electricity eliminator 40 which neutralizes the surface of double-sided bonding film F105. The electrostatic eliminator 40 is what is called an ionizer, and is arrange|positioned on the upstream side rather than the recording device 13 (printing head 13a) in the conveyance direction of the double-sided bonding film F105. And this electrostatic eliminator 40 removes the static electricity which generate|occur|produced on the surface of double-sided bonding film F105 by spraying the ionized gas over the whole width direction of double-sided bonding film F105.

Accordingly, in the film manufacturing apparatus 100, splashes of the ink (i) are prevented from being pulled close to the surface of the double-sided bonding film F105 by static electricity. Therefore, in the film manufacturing apparatus 100, by combining the above-described cover 30 and the static electricity eliminator 40, it is possible to further suppress the adhesion of splashes of the ink i to the surface of the double-sided bonding film F105. can

As described above, in the defect inspection system 10 in this embodiment, contamination of the double-sided bonding film F105 due to scattering of the ink i at the time of recording defect information on the double-sided bonding film F105 is prevented. can do.

In addition, this invention is not necessarily limited to the thing of the said embodiment, Various changes can be added in the range which does not deviate from the meaning of this invention.

Specifically, the printing device 50 is not limited to the configuration using the two light sources 54a and 54b and the two sensors 55a and 55b described above, and the number of light sources and sensors can be appropriately changed. . Specifically, when the number of sensors is increased to three or more, the degree of meandering of the double-sided bonding film F105 can be more finely detected.

That is, between one sensor and the other sensor, by detecting a different signal between at least one adjacent sensor and the other sensor among a plurality of sensors, the polarization area (Pa ) and the boundary B of the blank area Ma may be detected. In line with this, the printing head 13a can be moved to a position facing the recording area S by the head manipulation unit 51 .

On the other hand, regarding the light sources, it is not limited to the configuration in which the same number of light sources as those of the sensor described above is arranged, and it is also possible to arrange a smaller number of light sources than the sensor. Alternatively, a single light source may be used that emits light corresponding to a plurality of sensors, such as a surface light emitting source. In addition, about a sensor, it is not limited to the type which detects the transmitted light from double-sided bonding film F105, The type which detects the reflected light from double-sided bonding film F105 may be sufficient.

Moreover, in the said printing apparatus 50, although it is structured to move and operate the printing head 13a with respect to the double-sided bonding film F105, the double-sided bonding film F105 is moved to the width direction with respect to the printing head 13a. By operating, the printing head 13 can be relatively moved to a position facing the recording area S.

In addition, the cover 30 may have a configuration in which at least the first side plate portion 30a is disposed among the three side plate portions 30a, 30b, and 30c. Thereby, it can prevent that the scattering product of ink i adheres to the area|region overlapping the display area P4 of the double-sided bonding film F105.

Moreover, regarding the said cover 30, as shown in FIG. 10, the 4th side plate part which covers the side facing the outside of the double-sided bonding film F105 other than the said 3 side plate part 30a, 30b, 30c (30d) can also be arranged.

Regarding the recording device 13, for example, as shown in FIGS. 11(a) and 11(b), the lower end of the cover 31 attached to the printing head 13a is attached to the guide roll 41. It is good also as a shape conforming to an external shape. Thereby, the space|interval T between the double-sided bonding film F105 surface can be made into 1 mm or less.

In addition, as another embodiment of the present invention, a cover 32 as shown in Figs. 12(a) and 12(b) can also be used. This cover 32 consists of a plate material of a parallel plate type, and is arrange|positioned facing the double-sided bonding film F105 in the state approaching the double-sided bonding film F105. Further, a window (opening) 32a is provided at a position of the cover 32 facing the recording area S. In the case of this structure, by covering the area other than the recording area S with the cover 32, the double-sided bonding film F105 due to scattering of the ink i at the time of recording the defect information on the double-sided bonding film F105 contamination can be prevented. In addition, the above-described side plate portions 30a, 30b, 30c, and 30d may be installed on the cover 32. That is, the cover 32 may constitute a bottom plate portion covering the bottom surface of the cover 30 .

Further, although the recording device 13 has a structure disposed on the downstream side of the second defect inspection device 12, it is also possible to arrange it on the downstream side of the first defect inspection device 11. In this case, after defect inspection by the first defect inspection device 11 is performed, defect information can be recorded by the recording device 13 .

Note that the recording device 13 is not limited to recording defect information after the defect inspection described above. For example, in a long-distance transport line, there is a case in which a plurality of recording devices are arranged to record distance information for each fixed distance, and the distance is corrected based on the recorded distance information. Regarding the recording device which records such distance information, it may be arranged, for example, on the upstream side of the first defect inspection device 11 or the like.

In addition, the film to which the present invention is applied is not necessarily limited to optical films such as the above-described polarizing film, retardation film, and brightness enhancing film, and the present invention is applied to a film on which recording by the recording device 13 is performed. can be applied widely.

In addition, the present invention can be widely applied to a non-contact type printing apparatus and printing method such as a laser type other than the inkjet type described above. In particular, since ink mist is easily generated in the inkjet method, when fluctuations occur in the optical film, printing misses are likely to occur due to the influence thereof. Also, defect information is easily affected by vibration of the optical film when complex information such as the two-dimensional code described above is printed by an inkjet method.

10: defect inspection system, 11: first defect inspection device, 12: second defect inspection device, 13: recording device, 13a: printing head, 14: first length measuring device, 15: second length measuring device, 16: control device , 21a, 22a, 23a, 24a, 25a: lighting unit, 21b, 22b, 23b, 24b, 25b: light detection unit, 30: cover, 30a: first side plate, 30b: second side plate, 30c: third side plate , 30d: 4th side plate, 31: cover, 32: cover, 32a: window, 40: static electricity eliminator, 50: printing device, 51: head control unit, 52: support frame, 53: meander detection unit, 54a: first 54b: 2nd light source, 55a: 1st sensor, 55b: 2nd sensor, 100: film manufacturing apparatus, 101: 1st conveyance line, 102: 2nd conveyance line, 103: 3rd conveyance line, 104: 1st conveyance line 4 conveyance line, 105: 5th conveyance line, 106: winding unit, 111a, 111b: 1st nip roll, 112: 1st accumulator, 112a, 112b: 1st dancer roll, 113: 1st guide roll, 121a, 121b : 2nd nip roll, 122: 2nd accumulator, 122a, 122b: 2nd dancer roll, 123a, 123b: 2nd guide roll, 131a, 131b: 3rd nip roll, 141a, 141b: 4th nip roll, 142: 3rd accumulator, 142a, 142b: 3rd dancer roll, 143a, 143b: 4th guide roll, 151a, 151b: 5th nip roll, 152: 4th accumulator, 152a, 152b: 4th dancer roll, 153a: 5th Guide roll, 153b: 6th guide roll, 153c: 7th guide roll, P: liquid crystal display panel (optical display device), F1X: optical film, F10X: optical film, F101: first film, F102: second film, F103: 3rd film, F104: single-sided bonding film, F105: double-sided bonding film

Claims (9)

A conveyance line for conveying a long strip-shaped film;
A defect inspection device for inspecting defects of the film conveyed by the conveyance line;
a recording device for recording defect information based on a result of the defect inspection on a film conveyed to the conveyance line;
The recording device includes a printing head for printing the defect information in a recording area along an edge of the film, a meandering detection unit for detecting meandering of the film, and the printing head in a transport direction of the film relative to the film. Having a head control unit for moving and operating in a direction intersecting with,
The meandering detection unit has a plurality of sensors arranged side by side in a direction crossing the transport direction of the film,
The plurality of sensors are located inside the film in the width direction of the printing head;
The defect inspection system of claim 1 , wherein the head operation unit moves the printing head to a position facing the recording area in accordance with the meandering of the film detected by the meander detection unit. The defect inspection system according to claim 1, wherein the plurality of sensors are moved and operated in a direction crossing the transport direction of the film integrally with the printing head by the head operation unit. The defect inspection according to claim 2, wherein different signals are detected between at least one adjacent sensor and the other sensor among the plurality of sensors when the printing head is positioned opposite to the recording area. system. The method of claim 2, wherein the meander detection unit has at least one or a plurality of light sources that emit light toward the film, and a plurality of light-receiving elements arranged to face the light source with the film interposed therebetween as the sensor. Characteristic defect inspection system. The method of claim 3, wherein the meander detection unit has at least one or a plurality of light sources that emit light toward the film, and a plurality of light-receiving elements arranged to face the light source with the film interposed therebetween as the sensor. Characteristic defect inspection system. A film manufacturing apparatus provided with the defect inspection system according to any one of claims 1 to 5. A film manufacturing method including a step of inspecting a defect using the defect inspection system according to any one of claims 1 to 5. A printing device that prints in a recording area along an edge of a long strip-shaped film while conveying the film, comprising:
a printing head for printing on the film;
A meandering detection unit for detecting meandering of the film;
A head control unit configured to move the printing head relative to the film in a direction crossing the transport direction of the film,
The meandering detection unit has a plurality of sensors arranged side by side in a direction crossing the transport direction of the film,
The plurality of sensors are located inside the film in the width direction of the printing head;
The printing device in which the head operation unit moves the printing head to a position facing the recording area in accordance with the meandering of the film detected by the meandering detection unit. A printing method in which, while conveying a long strip-shaped film, printing is performed on a recording area along an edge of the film using a printing head, comprising:
A step of detecting meandering of the film;
moving the printing head relative to the film to a position facing the recording area in accordance with the detected meandering of the film;
a step of printing on the recording area using the printing head;
In the step of detecting, a plurality of sensors arranged side by side in a direction crossing the transport direction of the film inside the printing head in the width direction of the film are used, based on the magnitude of signals from the plurality of sensors. A printing method for detecting the meandering by doing.

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