TWI775815B - Defect inspection system, film manufacturing apparatus, film manufacturing method, printing apparatus, and printing method - Google Patents

Abstract

A printing apparatus (50) that performs printing, during transporting a film (F105) having an elongated band shape, on a recording region (S) along an end edge part of the film (F105) includes: a printing head (13a) that performs printing with respect to the film (F105); a meander detection part (53) that detects meandering of the film (F105); and a head operation part (51) that operates the printing head (13a) to move in a direction which intersects with a transport direction of the film (F105), wherein the head operation part (51) moves the printing head (13a) to a position that is opposed to the recording region (S) in accordance with the meandering of the film (F105) that is detected by the meander detection part (53).

Description

Defect inspection system, film manufacturing apparatus, film manufacturing method, printing apparatus, 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 being inspected for defects such as foreign matter defects and concave-convex defects. Information related to the position and type of defects (hereinafter referred to as defect information) is recorded on the optical film by printing a barcode on the end of the optical film or printing a mark on the defect site. When the winding amount of the optical film wound around the core material reaches a certain amount, it is cut from the optical film from the upstream side and shipped as a roll of the optical film. For example, Japanese Patent Application Laid-Open No. 2011-7779 discloses a defect inspection system in which a defect inspection device and a recording device for recording defect information on the film are provided on a conveying line of an optical film.

However, in the above-described defect inspection system, when the defect information is recorded on the optical film, the optical film during conveyance may meander depending on the state of the optical film, conveyance conditions, and the like. If such a meandering of the optical film occurs, there is a possibility that the defect information printed on the ink ejected from the printing head will not be correctly recorded in the recording area along the edge of the optical film, and a printing error may occur. .

The aspect of the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a method that can be suitably used along the edge of the film even if meandering occurs during conveyance of the long-belt-shaped film. A defect inspection system, a film manufacturing apparatus, a film manufacturing method, a printing apparatus and a printing method for performing printing in a recording area.

In order to solve the above-mentioned problems, an aspect of the present invention adopts the following configuration.

A defect inspection system according to one aspect of the present invention includes: a conveying line for conveying a long-belt-shaped film; a defect inspection device for inspecting defects of the film conveyed on the conveying line; and a recording device for The defect information obtained as a result of the defect inspection is recorded on the film conveyed on the conveying line, wherein the recording device includes a printing head for printing the defect information on a recording area along the edge of the film; a meandering detection unit for detecting meandering of the film; and a head operation unit for performing an operation for moving the printing head relative to the film in a direction intersecting with the conveying direction of the film, and the head operation unit cooperates with the The meandering of the film detected by the meandering detection unit moves the print head to a position facing the recording area.

In the defect inspection system of the above aspect, the meandering detection unit may have a plurality of sensors arranged in a direction intersecting with the conveying direction of the film, and the head operation unit may perform the operation of causing the plurality of sensors to be The operation of moving the printing head integrally in the direction intersecting with the conveying direction of the film.

In the defect inspection system of the above aspect, when the print head is located at a position opposite to the recording area, at least one sensor adjacent to the other sensor among the plurality of sensors may be adjacent to the other sensor. Different signals are detected between the sensors.

In the defect inspection system of the aforementioned aspect, the meandering detection unit may include: at least one or a plurality of light sources for irradiating light on the film; and the sensor arranged so as to face the light source with the film interposed therebetween. A plurality of photosensitive elements.

Another aspect of the present invention is a film manufacturing apparatus including the defect inspection system of any one of the aforementioned aspects.

Yet another aspect of the present invention is a film manufacturing method including the step of performing defect inspection using the defect inspection system of any one of the foregoing aspects.

Still another aspect of the present invention is a printing device for printing in a recording area along an edge portion of the film while conveying a long strip-shaped film, comprising: a printing head for performing printing on the film printing; a meandering detection unit for detecting meandering of the film; and a head operation unit for performing an operation for moving the printing head relative to the film in a direction intersecting with the conveying direction of the film, wherein the head operates The part moves the printing head to a position opposite to the recording area in accordance with the meandering of the film detected by the meandering detection part.

In the printing apparatus according to the above aspect, the meandering detection unit may have a plurality of sensors arranged in a direction intersecting with the conveying direction of the film, and the plurality of sensors may be caused to match the printing by the head operation unit. The head is integrally moved and operated in a direction intersecting with the conveying direction of the film.

In the printing device of the above aspect, when the printing head is located at a position opposite to the recording area, at least one adjacent sensor and the other sensor among the plurality of sensors may be adjacent to each other. Different signals are detected between the detectors.

In the printing apparatus of the aforementioned aspect, the meandering detection portion may include at least one or a plurality of light sources for irradiating the film with light.

Still another aspect of the present invention is a printing method for performing printing on a recording area along an edge portion of the film using a printing head while conveying a long strip-shaped film, comprising: detecting meandering of the film The process 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 the process of using the printing head to print in the recording area.

In the printing method of the above aspect, a plurality of sensors that are arranged in a direction intersecting the conveying direction of the film and are operated to move in the direction intersecting the conveying direction of the film integrally with the printing head can be used. device to detect the edge of the film.

In the printing method of the above aspect, when the printing head is located at a position opposite to the recording area, at least one adjacent sensor and the other sensor among the plurality of sensors can be Different signals are detected between the detectors.

In the printing method of the aforementioned aspect, at least one or a plurality of light sources for irradiating light to the aforementioned film may be used.

As described above, according to the aspect of the present invention, even if meandering occurs during conveyance of a long-belt-shaped film, it is possible to appropriately perform defect inspection of printing in the recording area along the edge of the film System, film manufacturing apparatus, film manufacturing method, printing apparatus and printing method.

10‧‧‧Defect Inspection System

11‧‧‧First Defect Inspection Device

12‧‧‧Second defect inspection device

13‧‧‧Recording device

13a‧‧‧Print head

14‧‧‧First Length Gauge

15‧‧‧Second length measuring device

16‧‧‧Control device

21a, 22a, 23a, 24a, 25a‧‧‧Lighting

21b, 22b, 23b, 24b, 25b‧‧‧Light detection part

30‧‧‧Cover

30a‧‧‧First side plate

30b‧‧‧Second side plate

30c‧‧‧The third side plate

30d‧‧‧The fourth side plate

31‧‧‧Covering

32‧‧‧covering

32a‧‧‧Window

40‧‧‧Static removal device

50‧‧‧Printing device

51‧‧‧Head Operation

52‧‧‧Support frame

52a‧‧‧Upper side arm

52b‧‧‧Lower side arm

52c‧‧‧Connection

53‧‧‧Snake Detection Department

54a‧‧‧First light source

54b‧‧‧Second light source

55a‧‧‧First sensor

55b‧‧‧Second sensor

100‧‧‧Membrane manufacturing equipment

101‧‧‧First transfer line

102‧‧‧Second transfer line

103‧‧‧The third transfer line

104‧‧‧The fourth conveying line

105‧‧‧Fifth transfer line

106‧‧‧Coiler

111a, 111b‧‧‧First nip roll

112‧‧‧First accumulator

112a, 112b‧‧‧First Tensioner Roller

113‧‧‧First guide roller

121a, 121b‧‧‧Second nip roll

122‧‧‧Second accumulator

122a, 122b‧‧‧Second tensioning roller

123a, 123b‧‧‧Second guide roller

131a, 131b‧‧‧The third nip roll

141a, 141b‧‧‧The fourth nip roll

142‧‧‧Third accumulator

142a, 142b‧‧‧The third dancer roller

143a, 143b‧‧‧The fourth guide roller

151a, 151b‧‧‧Fifth nip roll

152‧‧‧Fourth accumulator

152a, 152b‧‧‧The fourth dancer roller

153a‧‧‧Fifth guide roller

153b‧‧‧Sixth guide roller

153c‧‧‧Seventh guide roller

B‧‧‧junction

F1X‧‧‧Optical Film

F4‧‧‧Substrate sheet

F4a‧‧‧Polarizer

F4b, F4c‧‧‧Protective film

F5‧‧‧Adhesive layer

F6‧‧‧Separator

F7‧‧‧Surface Protection Sheet

F8‧‧‧Lamination Sheet

F10X‧‧‧Optical Film

F11‧‧‧First Optical Film

F12‧‧‧Second Optical Film

F13‧‧‧Third Optical Film

F101‧‧‧First Film

F102‧‧‧Second film

F103‧‧‧Third film

F104‧‧‧Single-sided lamination film

F105‧‧‧Double-sided lamination film

FX‧‧‧Optical Sheet

G‧‧‧Frame edge

Ma‧‧‧white space

P‧‧‧LCD panel (optical display device)

P1‧‧‧First substrate

P2‧‧‧Second substrate

P3‧‧‧liquid crystal layer

P4‧‧‧Display area

Pa‧‧‧Polarization area

S‧‧‧Recording area

FIG. 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 .

Fig. 3 is a cross-sectional view showing an example of an optical film.

FIG. 4 is a side view showing the configuration of a film manufacturing apparatus and a defect inspection system.

Fig. 5 is a plan view showing the structure of the double-sided bonding film.

Fig. 6 shows the structure of the printing device, Fig. 6(a) is a plan view of the printing device as seen from the upper side of the film, and Fig. 6(b) is a side view of the printing device as seen from the film conveying direction.

Fig. 7 shows the operation of the printing device shown in Fig. 6, Fig. 7(a) is a side view of the case where the printing head is in the normal position, and Fig. 7(b) is a side view of the case where the printing head is outside , Figure 7 (c) is a side view of the case where the print head is on the inside.

Fig. 8 is a side view showing an example of a recording apparatus.

Fig. 9 shows an example of the cover, Fig. 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 membrane.

Fig. 10 is a plan view showing a modification of the cover.

Fig. 11 shows a modification of the cover, Fig. 11(a) is a perspective view of the cover, and Fig. 11(b) is a side view of the cover.

Fig. 12 shows another embodiment of the cover, Fig. 12(a) is a plan view of the cover, and Fig. 12(b) is a side view of the cover.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

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

The film manufacturing apparatus manufactures, for example, a polarizing film, a retardation film, a brightness enhancement film, etc., for lamination on a panel-shaped optical display element (optical display panel) such as a liquid crystal display panel (panel) and an organic EL display panel (optical display panel). A device for film-like optical components (optical films). The film manufacturing apparatus constitutes a part of a production system for producing an optical display device including such an optical display element and optical components.

In this embodiment, a transmissive liquid crystal display device will be described as an example of an optical display device. The transmissive liquid crystal display device includes a liquid crystal display panel and a backlight. In this liquid crystal display device, the illumination light emitted from the backlight is incident from the back side of the liquid crystal display panel, and the light modulated by the liquid crystal display panel is emitted from the front side of the liquid crystal display panel to display an image.

(optical display device)

First, the configuration of the liquid crystal display panel P shown in FIGS. 1 and 2 will be described with respect to an optical display device. FIG. 1 is a plan view showing the configuration 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 taken along the section line A-A shown in FIG. 1 . In Fig. 2, the hatched line showing the 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 arranged opposite to the first substrate P1, and a second substrate P2 arranged between the first substrate P1 and the second substrate P2. Liquid crystal layer P3.

The first substrate P1 is formed of a transparent substrate having a rectangular shape in plan view. The second substrate P2 is formed of a rectangular transparent substrate smaller than the first substrate P1. The periphery between the 1st board|substrate P1 and the 2nd board|substrate P2 is sealed with the sealing material (not shown), and the liquid crystal layer P3 is arrange|positioned inside the area|region which is rectangular in plan view surrounded by the sealing material. In the liquid crystal display panel P, the area limited to the inner side of the outer periphery of the liquid crystal layer P3 in plan view is the display area P4, and the area surrounding the outer periphery of the display area P4 is the frame edge 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 enhancement film are laminated. On the surface (display surface side) of the liquid crystal display panel P, the second optical film F12 as a polarizing film is bonded. Hereinafter, the first, second, and third optical films F11, F12, and F13 are collectively referred to as optical films F1X.

(optical film)

Next, an example of the optical sheet FX which comprises the optical film F1X shown in FIG. 3 is demonstrated. Fig. 3 is a cross-sectional view showing the structure of the optical sheet FX. In Fig. 3, the hatched line showing the cross section is omitted.

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

In the case of a polarizing film, for example, the base sheet F4 has a structure in which a polarizer F4a is sandwiched between a pair of protective films F4b and F4c. The adhesive layer F5 is a layer for adhering the optical sheet (optical film F1X) on the liquid crystal display panel P. As shown in FIG. The separator F6 is a film that protects the adhesive layer F5. The separator F6 is peeled off from the adhesive layer F5 before the optical sheet (optical film F1X) is attached to the liquid crystal display panel P. Hereinafter, the part where the optical film F1X of the separator F6 has been torn off is referred to as a bonding sheet F8. The surface protection sheet F7 is a film for protecting the surface of the base material sheet F4. The surface protection sheet F7 is peeled off from the surface of the optical sheet (optical film F1X) after the optical sheet (optical film F1X) has been pasted to the liquid crystal display panel P.

In the aspect of the base sheet F4, either one of the pair of protective films F4b and F4c can be omitted. 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 provided on the polarizer F4a. In addition, the protective film F4c on the surface protective sheet F7 side may be subjected to, for example, a hard coating treatment for protecting the outermost surface of the liquid crystal display panel P, or an anti-glare treatment for obtaining an anti-glare effect. etc. surface treatment. In addition, the base material sheet F4 is not limited to the sheet of the above-mentioned laminated structure, and may be a sheet of a single-layer structure. In addition, the surface protection sheet F7 can also be abbreviate|omitted.

(Film manufacturing apparatus and film manufacturing method)

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

The film manufacturing apparatus 100 is, as shown in FIG. 4 , for example, after sticking a long strip-shaped second film F102 as a surface protection film on one side of a long strip-shaped first film F101 as a polarizing film, and then on the first film The other side of F101 is bonded to the long strip-shaped third film F103 as a surface protection film, and a device in which the optical film F10X of the second film F102 and the third film F103 is bonded to both sides of the first film F101 is manufactured in this way.

Specifically, this film manufacturing apparatus 100 is provided with the 1st conveyance line 101, the 2nd conveyance line 102, the 3rd conveyance line 103, the 4th conveyance line 104, the 5th conveyance line 105, and the winding part 106.

The first transfer line 101 forms a transfer path for transferring the first film F101. The 2nd conveyance line 102 forms the conveyance path which conveys the 2nd film F102 drawn out from the 1st roll R1. The 3rd conveyance line 103 forms the conveyance path which conveys the single-sided bonding film F104 after bonding the 2nd film F102 on one surface of the 1st film F101. The 4th conveyance line 104 forms the conveyance path which conveys the 3rd film F103 drawn out from the 2nd roll R2. The fifth conveyance line 105 forms the double-sided bonding film F105 (optical film F10X) after the third film F103 is bonded on the surface of the single-sided bonding film F104 on the first film F101 side (the other side of the first film F101). the transport path. The manufactured optical film F10X is wound around the core material in the winding part 106, and becomes the 3rd roll R3.

The first conveying line 101 applies dyeing treatment, cross-linking treatment, stretching treatment, etc. to a film such as PVA (Polyvinyl Alcohol), which is a base material of a polarizer, and then sticks TAC (three) on both sides of the film. The long-belt-shaped 1st film F101 obtained by the protective film, such as cellulose acetate: Triacetylcellulose), is conveyed to the 3rd conveyance line 103.

Specifically, on the first conveyance line 101, a pair of first nip rollers ( nip rollers 111a, 111b, a first accumulator 112 including a plurality of first dancer rollers 112a, 112b, and a first guide roller 113.

The pair of first nip rolls 111a and 111b sandwich the first film F101 and rotate in opposite directions at the same time, thereby pulling the first film F101 in the direction of arrow a (right) shown in FIG. 4 .

The first accumulator 112 is used to absorb the difference caused by the fluctuation of the feed amount of the first film F101 and reduce the fluctuation of the tension applied to the first film F101. Specifically, the first accumulator 112 has a plurality of dancer rollers 112a located on the upper side and a plurality of dancer rollers 112b located on the lower side alternately between the first nip rollers 111a, 111b and the first guide roller 113 The composition of the arrangement configuration.

The first accumulator 112 is in a state in which the first film F101 is alternately passed around the dancer roll 112a on the upper side and the dancer roll 112b on the lower side, and the first film F101 is conveyed while the upper side is conveyed. The dancer roller 112a and the dancer roller 112b on the lower side relatively move up and down in the vertical direction. In this way, the first film F101 can be temporarily accumulated without stopping the first conveyance line 101 . For example, when the first accumulator 112 increases the distance between the dancer roller 112a on the upper side and the dancer roller 112b on the lower side, the accumulation of the first film F101 can be increased. Conversely, when the first accumulator 112 reduces the distance between the dancer roller 112a on the upper side and the dancer roller 112b on the lower side, the accumulation of the first film F101 can be reduced. The first accumulator 112 is actuated, for example, at the time of work such as connection of sheet tapes after replacing the core materials of the reels R1 to R3.

The first guide roller 113 rotates to guide the first film F101 pulled by the first nip rollers 111 a and 111 b and conveyed toward the upstream side of the third conveyance line 103 . The first guide roller 113 is not limited to a configuration in which only one is arranged, and a configuration in which a plurality of first guide rollers are arranged may be used.

The second transfer line 102 pulls out the long strip-shaped second film F102 as a surface protective film such as PET (Polyethylene Terephthalate) from the first reel R1, and transfers it to The third conveying line 103 conveys.

Specifically, on this second conveyance line 102, a pair of second nip rollers are arranged in sequence in the horizontal direction from the other side upstream of the third conveyance line 103 toward the direction of the third conveyance line 103. 121a, 121b, a second accumulator 122 including a plurality of second dancer rollers 122a, 122b, and a plurality of second guide rollers 123a, 123b.

The pair of second nip rolls 121a and 121b sandwich the second film F102 and rotate in opposite directions at the same time, thereby pulling the second film F102 in the direction of arrow b (leftward) shown in FIG. 4 .

The second accumulator 122 is used to absorb the difference caused by the fluctuation of the feed amount of the second film F102 and reduce the fluctuation of the tension applied to the second film F102. Specifically, the second accumulator 122 has a plurality of dancer rollers 122a located on the upper side and a plurality of dancer rollers located on the lower side between the second nip rollers 121a, 121b and the second guide rollers 123a, 123b 122b The composition of the alternate arrangement configuration.

The second accumulator 122 is in a state in which the second film F102 is alternately passed around the dancer roller 122a on the upper side and the dancer roller 122b on the lower side, and the second film F102 is conveyed while conveying the second film F102. The dancer roller 122a and the dancer roller 122b on the lower side relatively move up and down in the vertical direction. In this way, the second film F102 can be temporarily accumulated without stopping the second conveyance line 102 . For example, when the second accumulator 122 increases the distance between the dancer roller 122a on the upper side and the dancer roller 122b on the lower side, the accumulation of the second film F102 can be increased. Conversely, the second accumulator 122 reduces the distance between the dancer roller 122a on the upper side and the dancer roller 122b on the lower side, thereby reducing the accumulation of the second film F102. The second accumulator 122 is actuated, for example, at the time of work such as connection of sheet tapes after replacing the core materials of the reels R1 to R3.

The plurality of second guide rollers 123a and 123b respectively rotate to guide the second film F102 pulled by the second nip rollers 121a and 121b and conveyed to the upstream side of the third conveyance line 103 . The second guide rollers 123a and 123b are not limited to a configuration in which a plurality of the second guide rollers 123a and 123b are arranged, and a configuration in which only one is arranged may be used.

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

Specifically, a pair of third nip rollers 131 a and 131 b are arranged on the third conveying line 103 . A pair of third nip rolls 131a, 131b are located at the junction of the downstream side of the first conveyance line 101 and the downstream side of the second conveyance line 102, and the first film F101 and the second film F102 are sandwiched and moved in opposite directions at the same time. By rotating, the single-sided bonding film F104 in which both the 1st film F101 and the 2nd film F102 were bonded together is pulled in the direction (downward) of the arrow c shown in FIG. 4 .

The 4th conveyance line 104 draws out the long-belt-shaped 3rd film F103 which is a surface protective film, such as PET (Polyethylene Terephthalate), from the 2nd roll R2, and conveys it to the 5th conveyance line 105.

Specifically, on the fourth conveyance line 104, a pair of fourth nip rollers 141a are arranged in sequence in the horizontal direction from the downstream side of the third conveyance line 103 toward the direction of the third conveyance line 103. , 141b, a third accumulator 142 including a plurality of third dancer rollers 142a, 142b, and a plurality of fourth guide rollers 143a, 143b.

The pair of fourth nip rolls 141a and 141b rotate in opposite directions to each other while sandwiching the third film F103, thereby moving the third film F103 in the direction of the arrow d (right side) shown in FIG. 4 . )pull.

The third accumulator 142 is used to absorb the difference caused by the fluctuation of the feed amount of the third film F103 and reduce the fluctuation of the tension applied to the third film F103. Specifically, the third accumulator 142 has a plurality of dancer rollers 142a located on the upper side and a plurality of dancer rollers located on the lower side between the fourth nip rollers 141a, 141b and the fourth guide rollers 143a, 143b 142b The composition of the alternate arrangement configuration.

The third accumulator 142 is in a state in which the third film F103 is alternately passed around the upper dancer roll 142a and the lower dancer roll 142b, and conveys the third film F103 while making the upper part. The dancer roller 142a and the dancer roller 142b on the lower side relatively move up and down in the vertical direction. In this way, the third film F103 can be temporarily accumulated without stopping the fourth conveyance line 104 . For example, when the third accumulator 142 increases the distance between the dancer roller 142a on the upper side and the dancer roller 142b on the lower side, the accumulation of the third film F103 can be increased. Conversely, when the third accumulator 142 reduces the distance between the dancer roller 142a on the upper side and the dancer roller 142b on the lower side, the accumulation of the third film F103 can be reduced. The third accumulator 142 is actuated, for example, at the time of work such as connection of sheet tapes after replacing the core materials of the reels R1 to R3.

The plurality of fourth guide rollers 143a, 143b are respectively rotated to guide the third film F103 pulled by the fourth nip rollers 141a, 141b and conveyed to the downstream side of the third conveyance line 103 (upstream of the fifth conveyance line 105). side). The fourth guide rollers 143a and 143b are not limited to a configuration in which a plurality of them are arranged, and a configuration in which only one is arranged may be used.

The fifth conveyance line 105 is a long-belt-shaped double-sided bonding film F105 ( Optical film F10X) is conveyed to the 3rd roll R3.

Specifically, on this fifth conveyance line 105, a pair of fifth nip rolls are arranged in order in the horizontal direction from the other side downstream of the third conveyance line 103 toward the third web R3. 151a, 151b, a fifth guide roller 153a, a pair of sixth nip rollers 151c, 151d, a fourth accumulator 152 including a plurality of fourth dancer rollers 152a, 152b, and a sixth guide roller 153b.

A pair of fifth nip rolls 151a, 151b are located at the junction of the downstream side of the third conveyance line 103 and the upstream side of the fifth conveyance line 105, and sandwich the single-sided bonding film F104 and the third film F103 while moving toward the By turning in the opposite direction, the double-sided bonding film F105 formed by bonding both the single-sided bonding film F104 and the third film F103 is pulled in the direction of the arrow e (downward) shown in FIG. 4 .

The 5th guide roller 153a rotates, and guides the double-sided bonding film F105 which the 5th nip roller 151a, 151b pulled and conveyed to the 4th accumulator 152. The fifth guide roller 153a is not limited to a configuration in which only one is arranged, and a configuration in which a plurality of fifth guide rollers are arranged may be used.

The pair of sixth nip rolls 151c and 151d rotate in opposite directions to each other while sandwiching the double-sided bonding film F105, thereby moving the double-sided bonding film F105 in the direction of the arrow f shown in FIG. 4 ( right) pull.

The fourth accumulator 152 is in a state in which the double-sided bonding film F105 is alternately passed around the dancer roller 152a on the upper side and the dancer roller 152b on the lower side, while conveying the double-sided bonding film F105, the upper part is conveyed. The dancer roller 152a on the side and the dancer roller 152b on the lower side relatively move up and down in the vertical direction. In this way, the double-sided bonding film F105 can be accumulated without stopping the fifth conveyance line 105 . For example, by increasing the distance between the dancer roller 152a on the upper side and the dancer roller 152b on the lower side by the fourth accumulator 152, the accumulation of the double-sided bonding film F105 can be increased. Conversely, by reducing the distance between the dancer roller 152a on the upper side and the dancer roller 152b on the lower side by the fourth accumulator 152, the accumulation of the double-sided bonding film F105 can be reduced. The fourth accumulator 152 is actuated, for example, at the time of work such as connection of sheet tapes after replacing the core materials of the reels R1 to R3.

The 6th guide roller 153b rotates, and guides the double-sided bonding film F105 to the 3rd web R3. The sixth guide roller 153b is not limited to a configuration in which only one is arranged, and a configuration in which a plurality of the sixth guide rollers are arranged may be used.

After the double-sided bonding film F105 is wound around the core material by the winding unit 106, it is sent to the next step as the third roll R3 of the optical film F10X.

(Defect Inspection System)

Next, the defect inspection system 10 included in the film manufacturing apparatus 100 described above 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, a first length measuring device 14, a second length measuring device 15, and the control device 16 .

The conveyance line L forms a conveyance path for conveying the film to be inspected. In this embodiment, the conveyance line L is constituted by the above-mentioned first conveyance line 101 , third conveyance line 103 , and fifth conveyance line 105 .

The 1st defect inspection apparatus 11 is an apparatus which performs defect inspection of the 1st film 101 before bonding the 2nd film F102 and the 3rd film F103. Specifically, the first defect inspection apparatus 11 detects various defects such as foreign matter defects, uneven defects, and bright spot defects, which are generated when the first film F101 is produced and when the first film F101 is conveyed. The first defect inspection apparatus 11 performs inspection processing such as reflection inspection, transmission inspection, oblique transmission inspection, crossed Nichol transmission inspection, etc. on the first film F101 conveyed on the first conveyance line 101, to detect the defect of the first film F101.

The first defect inspection device 11 includes a plurality of illumination units 21a, 22a, and 23a for irradiating the first film F101 with light, and a plurality of illumination units 21a, 22a, and 23a for irradiating light to the first film F101, and detecting A plurality of light detection portions 21b, 22b, 23b of light transmitted through the first film F101 (transmitted light) or light reflected by the first film F101 (reflected light).

In the present embodiment, the structure for detecting transmitted light consists of a plurality of illumination units 21a, 22a, 23a and a plurality of light detectors that are arranged in a row in the conveyance direction of the first film F101 and face each other with the first film F101 interposed therebetween. Sections 21b, 22b, 23b. In addition, the first defect inspection apparatus 11 is not limited to such a structure for detecting transmitted light, and may be a structure for detecting reflected light, or a structure for detecting transmitted light and reflected light. In the case of detecting the reflected light, the light detection units 21b, 22b, and 23b may be arranged on the side of the illumination units 21a, 22a, and 23a.

The illumination parts 21a, 22a, and 23a irradiate the first film F101 with illumination light whose intensity, wavelength, polarization state, and the like have been adjusted according to the type of defect inspection. The light detection parts 21b, 22b, and 23b use imaging elements such as CCDs to pick up images of the positions where the illumination light is irradiated on the first film F101. The images (defect inspection results) captured by the photodetectors 21 b , 22 b , and 23 b are output to the control device 16 .

The 2nd defect inspection apparatus 12 is an apparatus which performs defect inspection of the 1st film 101 after bonding the 2nd film F102 and the 3rd film F103, ie, the double-sided bonding film F105. Specifically, this 2nd defect inspection apparatus 12 detects the foreign material which generate|occur|produces when the 1st film F101 bonds the 2nd film F102 and the 3rd film F103, when the single-sided bonding film F104 and the double-sided bonding film F105 are conveyed Various defects such as defects, uneven defects, bright spot defects, etc. The second defect inspection apparatus 12 performs inspection processing such as reflection inspection, transmission inspection, oblique transmission inspection, cross-polarized light transmission inspection, etc. on the double-sided bonding film F105 conveyed on the fifth conveyance line 105 to detect Defects of double-sided bonding film F105.

The second defect inspection device 12 includes a plurality of illumination units 24a and 25a for irradiating the double-sided bonding film F105 with light, and a plurality of illumination units 24a and 25a for detecting transmission on the fifth conveying line 105 downstream of the fifth nip rollers 151a and 151b. The light (transmitted light) passing through the double-sided bonding film F105 or the light (reflected light) reflected by the double-sided bonding film F105 is a plurality of light detection parts 24b, 25b.

In this implementation form, it is used to detect the composition of transmitted light, which is arranged in the displacement of the transfer direction of the F105 of the F105 on both sides, and the corresponding plural of the lighting department 24A, 25A, and the number of multiple lights are relative to each other. Each photodetector 24b, 25b. In addition, the second defect inspection device 12 is not limited to such a configuration for detecting transmitted light, and may be a configuration for detecting reflected light, or a configuration for detecting transmitted light and reflected light. In the case of detecting the reflected light, the light detection parts 24b and 25b may be arranged on the side of the illumination parts 24a and 25a.

The illumination parts 24a and 25a irradiate the double-sided bonding film F105 with illumination light whose intensity, wavelength, polarization state, etc. have been adjusted according to the type of defect inspection. The photodetection part 24b, 25b picks up the image of the position irradiated to the illumination light of the double-sided bonding film F105 using imaging elements, such as CCD. The images (defect inspection results) captured by the photodetectors 24 b and 25 b are output to the control device 16 .

The recording device 13 is a device (printing device) for recording defect information obtained from the results of the defect inspections by the first defect inspection device 11 and the second defect inspection device 12 on the double-sided bonding film F105. Specifically, the defect information includes information related to the location and type of defects, etc., and is recorded in the form of identification codes such as characters, barcodes, two-dimensional barcodes (DataMatrix code, QR code (registered trademark)) (printed on ). The identification code includes, for example, information indicating that the defect detected by the first defect inspection device 11 and the second defect inspection device 12 is present at a distance in the width direction of the film from the position where the identification code is printed (the difference between the defect and the defect). location-related information). The identification code may also contain information related to the type of detected defect. In this embodiment, the printed defect information is a two-dimensional bar code of 7mm×7mm.

The recording device 13 is provided on the downstream side of the fifth conveyance line 105 rather than the second defect inspection device 12 . The recording device 13 has a print head 13a using, for example, an ink jet method. Moreover, the 7th guide roller 153c which contacts with the double-sided bonding film F105 is arrange|positioned in the position which opposes the printing head 13a. The print head 13a discharges ink from the opposite side of the double-sided bonding film F105 to the position where the seventh guide roller 153c is in contact with the recording region along the edge of the double-sided bonding film 105 in the width direction, thereby causing the above-mentioned defects. Printing of information.

Here, as shown in FIG. 5, the double-sided lamination film F105 has: by forming the widths of the second film F102 and the third film F103 to be wider than the first film F101, it is sandwiched between the second film F102 and the third film F103. The two sides of the width direction of the 1st film F101 between the 3rd films F103 are provided with the structure of the blank area Ma which consists of the 2nd film F102 and the 3rd film F103.

The blank area Ma is located at a position other than the area where the first film F101 is arranged, that is, at the position outside the area (also referred to as the polarizing area) Pa that functions as a polarizing film. When reaching the above-mentioned liquid crystal display panel P, it will be located outside the area overlapping the display area P4 of the liquid crystal display panel P. As shown in FIG. The blank area Ma is an area to be cut out before being attached to the liquid crystal display panel P described above.

The recording device 13 records defect information on the blank area Ma at a constant distance from the boundary B between the polarized area Pa and the blank area Ma on the double-sided lamination film F105. Therefore, the area in which defect information is recorded in the blank area Ma is called a recording area S. In this embodiment, the recording area S is provided in the blank area Ma on one side in the width direction of the double-sided bonding film F105.

The recording device 13 can also directly record on the defective portion by printing dot-shaped, linear or frame-shaped markings of a size to contain the defect on the defective portion of the double-sided lamination film F105. In this case, in addition to the mark, information related to the type of defect may be recorded by printing a mark or pattern indicating the type of defect.

The first length measuring device 14 and the second length measuring device 15 measure the conveyance amount of the first film F101. Specifically, in the present embodiment, on the first conveying line 101, a rotary encoder (rotary encoder) constituting the first length measuring device 14 is disposed on the first nip roller 111a located on the upstream side of the first accumulator 112. encoder), and a rotary encoder constituting the second length measuring device 15 is arranged on the third nip roller 131a located on the downstream side of the first accumulator 112.

The first length measuring device 14 and the second length measuring device 15 use rotary encoders to measure the first film based on the rotational displacement of the first nip roll 111a and the third nip roll 131a that are rotated in contact with the first film F101 The conveying capacity of F101. The measurement results of the first length measuring device 14 and the second length measuring device 15 are output to the control device 16 .

In the present embodiment, there is only one accumulator between the first defect inspection device 11 and the recording device 13, so one length measuring device is arranged on the upstream side and the downstream side of the accumulator, respectively. On the other hand, when there are a plurality of accumulators between the first defect inspection device 11 and the recording device 13 , only one is provided on the upstream side of the most upstream accumulator and one on the downstream side of the most downstream accumulator. Length measurer will do.

The control device 16 includes a system that controls each part of the film manufacturing apparatus 100 . Specifically, the control device 16 is provided with 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 and a hard disk.

In the information storage part of the control apparatus 16, the operating system (OS) which controls a computer system, the program which makes an arithmetic processing part perform various processing required by each part of the film manufacturing apparatus 100, etc. are recorded. The control device 16 may include a logic circuit such as an ASIC that performs various processing required for the control of each part of the film manufacturing apparatus 100 . In addition, the control device 16 includes an interface for performing input/output between the computer system and external devices. Input devices such as keyboards and mice, display devices such as liquid crystal displays, and communication devices can be connected to this interface.

The control device 16 analyzes the images captured by the photodetectors 21b, 22b, 23b and the photodetectors 24b, 25b, and determines the presence or absence (position), type, and the like of defects. When the control device 16 determines that the first film F101 or the double-sided bonding film F105 is defective, the control device 16 controls the recording device 13 to record the defect information on the double-sided bonding film F105.

The defect inspection system 10 records defect information at a predetermined timing after the defect inspection so as not to cause a deviation between the defect inspection position of the double-sided laminate film F105 and the information recording position of the defect information. For example, in this embodiment, the conveyance amount of the film conveyed on the conveyance line L after the time point when the first defect inspection apparatus 11 and the second defect inspection apparatus 12 perform defect inspection is calculated, and the calculated conveyance amount and the offset are calculated. When the distances (offset distances) match, the recording device 13 is caused to perform recording.

Here, the offset distance means the conveyance distance of the film between the first defect inspection apparatus 11 , the second defect inspection apparatus 12 , and the recording apparatus 13 . Strictly speaking, the offset distance is defined as the difference between the positions at which the first defect inspection apparatus 11 and the second defect inspection apparatus 12 perform defect inspection (defect inspection positions) and the positions at which the recording apparatus 13 records defect information (information recording positions). The conveying distance between the films. The offset distance varies when the first accumulator 112 is activated.

The offset distance (hereinafter referred to as the first offset distance) when the first accumulator 12 is not activated is stored in the information storage unit of the control device 16 in advance. Specifically, the first defect inspection apparatus 11 and the second defect inspection apparatus 12 include a plurality of photodetection units 21b, 22b, 23b and photodetection units 24b, 25b, and each photodetection unit 21b, 22b, 23b, 24b, 25b are all inspected for defects. Therefore, the first offset distance is stored in the information storage unit of the control device 16 for each of the light detection units 21b, 22b, 23b, 24b, and 25b, respectively.

When the offset distance fluctuates due to the operation of the first accumulator 112 , a correction value of the offset distance is calculated based on the difference in the conveyance amount of the first film F101 upstream and downstream of the first accumulator 112 . That is, the control device 16 calculates the accumulation amount of the first film F101 in the first accumulator 112 from the measurement results of the first length measuring device 14 and the second length measuring device 15, and based on this accumulation amount of the first film F101 to calculate the offset distance correction value.

When the first accumulator 112 is activated, the defect inspection system 10 corrects the timing of recording the defect information by the recording device 13 according to the correction value of the offset distance. For example, in the present embodiment, the correction value of the offset distance is calculated based on the measurement results of the first length measuring device 14 and the second length measuring device 15 . The control device 16 calculates the offset distance when the first accumulator 112 is activated (hereinafter referred to as the second offset distance) based on the correction value and the first offset distance.

In this embodiment, from the measurement results of the first length measuring device 14 and the second length measuring device 15 , on the conveyance line L after the time point when the defect inspection by the first defect inspection device 11 and the second defect inspection device 12 is performed is calculated. When the conveyance amount of the film to be conveyed and the calculated conveyance amount coincide with the second offset distance, the recording device 13 is made to record.

Moreover, in this embodiment, when the first accumulator 112 is activated, in addition to the defect information, information indicating that the first accumulator 112 is activated (hereinafter referred to as accumulator activation information) may be recorded on the double-sided lamination film F105. . In the case where the accumulator operation information is recorded, the operator can detect the deviation of the recorded position by carefully inspecting the defective part of the part where the accumulator operation information is printed. In this way, the possibility of erroneously determining a good part as a defective part is reduced, and the yield is improved.

However, in the defect inspection system 10 of the present embodiment, due to the state of the double-sided bonding film F105 (for example, film edge curl, deviation at the time of film bonding, or thickness unevenness in the film width direction), conveying conditions (for example, roll eccentricity of the core, unbalanced tension applied in the width direction of the film, etc.), etc., the double-sided bonding film F105 during conveyance may meander. When the double-sided lamination film F105 has such a meandering situation, the defect information printed by the ink ejected by the printing head 13a will not be correctly printed in the recording area along the edge of the double-sided lamination film F105, and There is a possibility of a typographical error.

The direction of "meaning" is the left-right direction (width direction) of the double-sided bonding film F105 when the surface of the double-sided bonding film F105 is viewed from above. "Meandering" of the double-sided bonding film F105 during conveyance means that the double-sided bonding film F105 is shifted to the double-sided bonding film F105 in the left-right direction (width direction) when the surface of the double-sided bonding film F105 is viewed from above. This action moves forward in the conveying direction.

In view of this, the present embodiment adopts the printing device 50 shown in Fig. 6(a) and (b) as the above-mentioned recording device 13, so that the meandering occurs even during the conveyance of the double-sided lamination film F105. , it is also possible to appropriately perform printing on the recording area S along the edge of the double-sided bonding film F105.

(Printing Device and Printing Method)

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

As shown in Fig. 6(a) and (b), the printing device 50 has a head operation unit 51 that performs an operation to move the printing head 13a in the direction (width direction) intersecting with the conveyance direction of the double-sided bonding film F105.

The head operating portion 51 has a support arm 52 that supports the print head 13a. The support arm 52 has: the upper arm 52a arranged to face the upper surface of the double-sided bonding film F105; the lower arm 52b arranged to face the lower surface of the double-sided bonding film F105; and the double-sided bonding film F105 On the outer side, a connecting portion 52c that connects the upper arm 52a and the lower arm 52b. The upper arm 52a and the lower arm 52b are extended in the width direction of the double-sided bonding film F105 in a state of being opposed to each other. The connection part 52c is extended in the up-down direction, and connects the base end side of the upper arm 52a and the lower arm 52b. The print head 13a is attached to the upper arm 52a.

The support arm 52 is supported so as to be slidable in the width direction of the double-sided bonding film F105. Moreover, the head operation part 51 has a slide drive part (not shown). The slide drive unit converts the rotational drive of the drive motor into linear drive through a gear and a rack, and drives the support arm 52 to slide in the width direction of the double-sided bonding film F105. Thereby, the print head 13a is driven to slide integrally with the support arm 52 in the width direction of the double-sided bonding film F105.

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

A plurality of light sources 54a, 54b are attached to the upper arm 52a. The plurality of light sources 54a and 54b are located on the upper arm 52a closer to the front end side than the print head 13a, and are arranged side by side in the extending direction of the upper arm 52a (the width direction of the both sides bonding film F105).

The light source close to the printing head 13a (one light source) is the first light source 54a, and the light source far from the printing head 13a (the other light source) is the second light source 54b. Each of the light sources 54a and 54b only needs to have different transmittances when the light emitted passes through the polarization region Fa and the blank region Ma, and both can emit visible light and infrared light, and a light-emitting diode that emits infrared (IR) light, for example, can be used. (LED) and other light-emitting elements.

A plurality of sensors 55a, 55b are mounted on the lower arm 52b. The plurality of sensors 55a and 55b are arranged in parallel in the extending direction of the lower arm 52b (the width direction of the both-side bonding film F105) so as to face the plurality of light sources 54a and 54b. The sensor opposite to the first light source 54a (one sensor) is the first sensor 55a, and the sensor opposite to the second light source 54b (the other sensor) is the second sensor sensor 55b. Each of the sensors 55a, 55b may use a photosensitive element such as a photodiode (PD).

In the meandering detection unit 53, the light emitted by the first light source 54a is sensed by the first sensor 55a, and the light emitted by the second light source 54b is sensed by the second sensor 55b. The plurality of light sources 54a, 54b and the plurality of sensors 55a, 55b are arranged in the same row as the printing head 13a or downstream of the printing head 13a in the width direction of the double-sided lamination film F105. The plurality of light sources 54a and 54b and the plurality of sensors 55a and 55b are also operated by the head operation unit 51 to move in the width direction of the double-sided bonding film F105 integrally with the print head 13a.

In the printing apparatus 50 having the above-described configuration, the head operating unit 51 moves the printing head 13a to a position facing the recording area S in accordance with the meandering of the double-sided bonding film F105 detected by the meandering detection unit 53 .

Hereinafter, as shown in FIGS. 7( a ) to ( c ), a specific operation of moving the printing head 13 a to a position facing the recording area S when the double-sided bonding film F105 being conveyed meanders will be described. .

Fig. 7(a) shows the case where the print head 13a is at 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, the boundary B between the polarization region Pa and the blank region Ma of the double-sided bonding film F105 is located between the first sensor 55a and the second sensor 55b.

Therefore, in the meandering 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, while the light BL2 emitted from the second light source 54b passes through polarized light The area Pa receives light by the second sensor 55b.

In this embodiment, the first light source 54a and the second light source 54b use the same light-emitting element, and the first sensor 55a and the second sensor 55b use the same light-emitting element. In this case, the transmittance of the light passing through the polarization region Pa is lower than that passing through the blank region Ma, so the received light amount (signal) of the first sensor 55a is large (Hi), and the light received amount of the second sensor 55b (Signal) is Small (Lo).

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

Fig. 7(b) is a situation in which the printing head 13a is deviated to the outside compared to the normal position due to the meandering of the double-sided lamination film F105. In this case, in the width direction of the double-sided bonding film F105, both the first sensor 55a and the second sensor 55b are shifted to the outside compared to the boundary B between the polarizing region Pa and the blank region Ma of the double-sided bonding film F105 .

Therefore, in the meandering 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, and similarly, the light BL2 emitted from the second light source 54b also passes through the blank area Ma On the other hand, light is received by the second sensor 55b. In this case, the light receiving amount (signal) of the first sensor 55a is high (Hi), and the light receiving amount (signal) of the second sensor 55b is also high (Hi).

When such a signal is detected, the head operation unit 51 determines that the print head 13a is shifted to the outside from the normal position, and moves the print head 13a inward in the width direction of the double-sided bonding film F105. Then, when it is determined from the signal detected by the meandering detection unit 53 that the print head 13a has reached the normal position, the position of the print head 13a in the width direction of the double-sided bonding film F105 is held.

Fig. 7(c) is a situation in which the printing head 13a is deviated to the inner side compared to the normal position due to the meandering of the double-sided lamination film F105. In this case, in the width direction of the double-sided bonding film F105, both the first sensor 55a and the second sensor 55b are offset to the inner side compared to the boundary B between the polarizing region Pa and the blank region Ma of the double-sided bonding film F105 .

Therefore, in the meandering 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, and similarly, the light BL2 emitted from the second light source 54b also passes through the polarization region Pa On the other hand, light is received by the second sensor 55b. In this case, the light receiving amount (signal) of the first sensor 55a is small (Lo), and the light receiving amount (signal) of the second sensor 55b is also small (Lo).

When such a signal is detected, the head operation unit 51 determines that the print head 13a is displaced inward from the normal position, and moves the print head 13a to the outside in the width direction of the double-sided bonding film F105. Then, when it is determined from the signal detected by the meandering detection unit 53 that the print head 13a has reached the normal position, the position of the print head 13a in the width direction of the double-sided bonding film F105 is held.

The determination of the difference (magnitude) of the received light amount (signal) received by the first sensor 55a and the second sensor 55b can be appropriately selected according to the structure of the double-sided lamination film F105. For example, assuming that the amount of light received in the polarization area Pa and the blank area Ma are A(Pa) and A(Ma), respectively, the value of {A(Pa)-A(Ma)}÷2 is used as the threshold, and the threshold is compared with If the difference in the received light amount between the two sensors 55a, 55b is larger than the threshold value, it can be considered that the received light amount (signal) detected between the two sensors 55a, 55b is different, and the received light amount is different. A large amount (signal) is a large (Hi), and a small amount of light (signal) is a small (Lo).

The interval between the adjacent sensors 55a, 55b is usually set smaller than the width of the recording area S, so it is better to set it at 1/3 to 1/2 times the width of the recording area S. within the range.

When the interval between the adjacent sensors 55a and 55b is within this range, the printing head 13a can be stably maintained at the position opposite to the recording area S with respect to the meandering of the double-sided bonding film F105. For example, in the case of printing a 7mm×7mm two-dimensional barcode on the 10mm wide recording area S in this embodiment, the interval between the adjacent sensors 55a and 55b can be set in the range of 3mm to 5mm.

The number of sensors to be arranged is usually about 2 to 6, and the more the number of sensors is, the more accurately the print head 13a can be held at a position facing the recording area S. On the other hand, if the number of sensors is too large, the meandering detection section 53 will be enlarged relative to the recording area S, and an unnecessary space will be created. Therefore, the number of sensors is preferably 2 to 4. .

In the printing method of the present embodiment, by using the above-mentioned printing device 50, the meandering of the double-sided bonding film F105 can be detected, and the printing head 13a can be moved to and recorded in accordance with the meandering of the double-sided bonding film F105 detected above. After the area S is positioned opposite to each other, printing is performed on the recording area S using the print head 13a.

As described above, the defect inspection system 10 of the present embodiment can appropriately record (print) defect information in the recording area S of the double-sided bonding film F105 even if the double-sided bonding film F105 being conveyed meanders. Therefore, the film manufacturing apparatus 100 of the present embodiment can prevent the occurrence of reading errors of defect information due to printing errors, and can cut out the optical film F10X from the double-sided lamination film F105 with a good yield, and can manufacture high-quality The optical film F10X.

In addition, in the defect inspection system 10 of this embodiment, the double-sided bonding film F105 during conveyance may jump, depending on the state of the double-sided bonding film F105, conveyance conditions, and the like. In particular, both ends in the width direction of the double-sided bonding film F105 tend to be curled due to moisture absorption of the film, drying conditions, and the like, and this curling is thought to be one of the causes of the jumping during conveyance.

In view of this, as shown in FIG. 8, the defect inspection system 10 of the present embodiment disposes the print head 13a so as to face the seventh guide roller 153c in contact with the above-mentioned double-sided lamination film F105.

Thereby, even in the case where the double-sided bonding film F105 has the both ends in the width direction during conveyance, the double-sided bonding film F105 can be restrained from jumping at the position where the double-sided bonding film F105 is in contact with the seventh guide roller 153c. . Therefore, the defect inspection system 10 of the present embodiment can appropriately record (print) the defect information to be printed on the ink i ejected from the printing head 13a in the recording area S of the double-sided bonding film F105.

The double-sided bonding film F105 is preferably wound around the outer peripheral surface of the seventh guide roller 153c in an angle range of 40° to 130° (hereinafter referred to as a surrounding angle θ). The surrounding angle in the present embodiment refers to an angular range in which the film is in contact with the outer peripheral surface of the guide roller in the circumferential direction by the central angle of the guide roller.

When the surrounding angle θ is less than 40°, the double-sided bonding film F105 easily slides on the outer peripheral surface of the seventh guide roller 153c. Therefore, in order to prevent scratches and the like due to the sliding of the double-sided bonding film F105, it is preferable that the surrounding angle θ be 40° or more. On the other hand, when the surrounding angle θ exceeds 130°, for example, air bubbles are likely to be bitten between the second and third films F102 and F103 and the first film F101 which are surface protection films.

Therefore, in order to prevent the entrapment of such air bubbles, the surrounding angle θ is preferably 130° or less.

Moreover, when the tension|tensile_strength applied to the double-sided bonding film F105 is low, it is preferable to make surrounding angle (theta) more than 90 degrees, More preferably, it is 95 degrees or more. In this way, it is possible to suppress the popping that occurs in the double-sided bonding film F105. On the other hand, when the tension applied to the double-coated film F105 is high, the surrounding angle ? is preferably less than 90°, more preferably 85° or less. In this way, the double-sided bonding film F105 can be prevented from adhering to the outer peripheral surface of the seventh guide roller 153c excessively.

The conveyance speed of the double-sided bonding film F105 is usually about 9 to 50 m/min. The tension applied to the double-sided bonding film F105 is about 400 to 1500N in the drying oven, and about 200 to 500N outside the drying oven. The smaller the tension applied to the double-sided lamination film F105, the easier it is to pop. The width of the double-sided lamination film F105 is in the range of 500 to 1500 mm. The larger the width of the double-sided lamination film F105 is, the more likely it is to pop. The thickness of the double-sided bonding film F105 is about 10 to 300 μm. The thinner the thickness of the double-sided lamination film F105, the easier it is to pop.

In addition, the outer diameter of the seventh guide roller 153c is preferably in the range of 100 to 150 mm. As the outer diameter of the seventh guide roller 153c increases, the area of the double-sided bonding film F105 that is in contact with the outer peripheral surface of the seventh guide roller 153c with respect to the surrounding angle θ increases. Therefore, it is possible to suppress the popping that occurs in the double-sided bonding film F105, and to further stabilize the recording area S. However, as the outer diameter of the seventh guide roller 153c increases, the above-mentioned scratches and entrapment of air bubbles are likely to occur, so it is preferable that the outer diameter be within the above-mentioned range.

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

In addition, the surface roughness (maximum roughness Ry) of the outer peripheral surface of the seventh guide roller 153c is preferably 100 s or less, more preferably 25 s or less. In this way, the occurrence of the above-mentioned scratches and entrapment of air bubbles can be suppressed.

In addition, in the defect inspection system 10 of the present embodiment, in order to suppress the snapping that occurs in the double-sided bonding film 105 also on the upstream side and the downstream side of the seventh guide roller 153c, a guide roller that is in contact with the double-sided bonding film F105 can be added. . In this case, the distance between the additional guide roller and the seventh guide roller 153c is preferably within 1000 mm. The double-sided bonding film F105 may have a surrounding angle with respect to an additional guide roll. It is preferable to have a surrounding angle with respect to the guide rolls added to the upstream side, and it is more preferable to have a surrounding angle with respect to the guide rolls added to both the upstream side and the downstream side.

As described above, the defect inspection system 10 of the present embodiment can reduce the influence caused by the popping of the double-sided bonding film F105 during conveyance, and can appropriately record (print) defect information on the double-sided bonding film F105 . Therefore, the film manufacturing apparatus 100 of the present embodiment can prevent the occurrence of reading errors of defect information due to printing errors, and can cut out the optical film F10X from the double-sided lamination film F105 with a good yield, and can manufacture high-quality The optical film F10X.

The recording device 13 in this embodiment is provided with a cover 30 to prevent the ink i from adhering to at least the inner side other than the recording area S of the double-sided lamination film F105 as shown in FIGS. 9( a ) to ( c ) area. Fig. 9(a) is a plan view of the cover 30 seen from the upper side of the double-sided bonding film F105, and Fig. 9(b) is a side view of the cover 30 seen from the upstream side of the double-sided bonding film F105 in the conveying direction, Fig. 9(c) is a side view of the cover 30 viewed from the outside of the double-sided bonding film F105.

Specifically, the cover 30 includes: a first side plate part 30a that covers the inner side of the double-sided bonding film F105 in the space K where the double-sided bonding film F105 faces the printing head 13a; The 2nd side board part 30b of the upstream side of the conveyance direction of the bonding film F105, and the 3rd side board part 30c which block the side facing the downstream side of the conveyance direction of the double-sided bonding film F105.

The cover 30 is detachably attached to the print head 13a by means of screw locking or the like. The cover 30 opens the side facing the outer side of the double-sided lamination film F105 in the space K, so that the attachment and detachment with respect to the printing head 13a is facilitated.

It is preferable that the space|interval T between the surface which opposes the double-sided bonding film F105 of the cover 30 and the surface of the double-sided bonding film F105 is 1 mm or less. By setting this interval T to be 1 mm or less, when the ink i ejected from the print head 13a scatters to the surroundings, it is possible to prevent the scatter of the ink i from scattering to the outside of the cover 30 .

Among the ink i ejected from the printing head 13a, for example, the ink i is scattered around the information recording position, and the ink i is attached to the double-sided lamination film F105 and then scattered around.

Among the three side plate portions 30a, 30b, and 30c constituting the cover 30, the first side plate portion 30a prevents the scattering of the ink i from adhering to the area of the double-sided lamination film F105 overlapping the display area P4, and the second side plate portion 30b is a The third side plate portion 30c prevents the scattering of ink i from adhering to the upstream side in the conveyance direction of the double-sided bonding film F105, and the third side plate portion 30c prevents the scattering of ink i from adhering to the downstream side in the conveying direction of the double-sided bonding film F105.

The scattered matter of the ink i adheres to the inner surface of the cover 30 . Therefore, the cover 30 can be periodically removed from the print head 13a, washed, and then attached to the print head 13a for repeated use.

Moreover, it is preferable that the film manufacturing apparatus 100 is provided with the structure provided with the static electricity removal apparatus 40 which removes the surface of the double-sided bonding film F105. The static electricity removal apparatus 40 is what is called an ionizer, and is arrange|positioned at the upstream side rather than the recording apparatus 13 (printing head 13a) in the conveyance direction of the double-sided bonding film F105. This static electricity removal apparatus 40 removes the static electricity which generate|occur|produces on the surface of the double-sided bonding film F105 by spraying ionized gas over the width direction of the double-sided bonding film F105.

Thereby, the film manufacturing apparatus 100 prevents the scattering material of the ink i from being attracted to the surface of the double-sided bonding film F105 by electrostatic attraction. Therefore, the film manufacturing apparatus 100 can further suppress the attachment of the scattered matter of the ink i to the surface of the double-sided bonding film F105 by combining the above-mentioned cover 30 and the static electricity removing apparatus 40.

As described above, the defect inspection system 10 of the present embodiment can prevent contamination of the double-sided bonding film F105 due to scattering of the ink i when recording defect information on the double-sided bonding film F105.

The present invention is not necessarily limited to the above-described embodiment, and various modifications can be added without departing from the gist of the present invention.

Specifically, the above-mentioned printing device 50 is not limited to the configuration using two light sources 54a, 54b and two sensors 55a, 55b, 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 meandering degree of the double-sided bonding film F105 can be detected more precisely.

That is, the polarization region Pa of the double-sided lamination film F105 can be detected by detecting different signals between at least one adjacent sensor and the other sensor among the plurality of sensors. The boundary B with the blank area Ma is located between one sensor and the other sensor. In conjunction with this, the print head 13 a can be moved to a position facing the recording area S by the head operating unit 51 .

On the other hand, in terms of light sources, the configuration is not limited to the configuration of the same number of light sources as the above-mentioned sensors, and the number of light sources less than that of the sensors may also be configured. In addition, it can also be one light source that emits light corresponding to a plurality of sensors, such as a surface light source. In terms of the sensor, it is not limited to the type that detects the transmitted light from the double-sided bonding film F105, but can also be the type that detects the reflected light from the double-sided bonding film F105.

In addition, although the above-described printing device 50 is configured to perform the operation of moving the printing head 13a with respect to the double-sided bonding film F105, it is also possible to adopt the operation of moving the double-sided bonding film F105 with respect to the printing head 13a in the width direction. The operation is such that the print head 13a is relatively moved to a position facing the recording area S. As shown in FIG.

Moreover, in the said cover 30, the structure which arrange|positions at least the 1st side plate part 30a among the said three side plate parts 30a, 30b, 30c may be sufficient. Thereby, it can prevent that the spatter of the ink i adheres to the area|region which overlaps with the display area P4 of the double-sided bonding film F105.

Moreover, as shown in FIG. 10, about the said cover 30, in addition to the said three side board parts 30a, 30b, 30c, the 4th side board which covers the side which faces the outer side of the double-sided lamination film F105 may be arrange|positioned. The structure of the part 30d.

In addition, regarding the recording device 13, as shown in Figs. 11(a) and (b), the lower end portion of the cover 31 attached to the print head 13a may be formed into a shape that fits the outer shape of the guide roller 41. Thereby, the space|interval T with the double-sided bonding film F105 can be made into 1 mm or less.

Moreover, as another embodiment of this invention, the cover 32 as shown in FIG. 12 (a), (b), for example can also be employ|adopted. The cover 32 is formed of a parallel flat plate, and is arranged to face the double-sided bonding film F105 in a state close to the double-sided bonding film F105. Further, a window portion (opening portion) 32a is provided at a position facing the recording area S on the cover 32 . In the case of this configuration, the cover 32 covers the area other than the recording area S, thereby preventing contamination of the double-sided bonding film F105 caused by scattering of the ink i when the double-sided bonding film F105 records defect information. In addition, the cover 32 may be provided with the above-mentioned side plate portions 30a, 30b, 30c, 30d. That is, the cover 32 can constitute a bottom portion covering the bottom surface of the cover 30 .

In addition, although the said recording apparatus 13 is formed in the structure arrange|positioned on the downstream side of the 2nd defect inspection apparatus 12, you may arrange|position it on the downstream side of the 1st defect inspection apparatus 11. In this case, after the defect inspection by the first defect inspection device 11 is performed, the recording of defect information by the recording device 13 may be performed.

In addition, the recording device 13 described above is not limited to recording defect information after the above-described defect inspection. Also, for example, a plurality of recording devices are arranged on a long-distance conveying line, distance information is recorded at each predetermined distance, and distance correction is performed based on the recorded distance information. A recording device for recording such distance information is, for example, arranged on the upstream side of the first defect inspection device 11 or the like.

In addition, the film suitable for use in the present invention is not necessarily limited to the above-mentioned optical films such as the polarizing film, retardation film, brightness enhancement film, etc., and the present invention can also be extended to the recording device 13 for recording thereon. film.

In addition to the above-described ink jet method, the present invention can also be widely applied to a non-contact printing apparatus and a printing method such as a laser method. In particular, the ink jet method tends to generate ink mist, so if the optical film bounces, it is easy to be affected by it and cause printing errors. The same is true for defect information. In the case of printing complex information such as the above-mentioned two-dimensional barcode by inkjet, it is more likely to be affected by the popping of the optical film.

13‧‧‧Recording device

13a‧‧‧Print head

50‧‧‧Printing device

51‧‧‧Head Operation

52‧‧‧Support frame

52a‧‧‧Upper side arm

52b‧‧‧Lower side arm

52c‧‧‧Connection

53‧‧‧Snake Detection Department

54a‧‧‧First light source

54b‧‧‧Second light source

55a‧‧‧First sensor

55b‧‧‧Second sensor

B‧‧‧junction

F105‧‧‧Double-sided lamination film

Ma‧‧‧white space

Pa‧‧‧Polarization area

S‧‧‧Recording area

Claims (9)

A defect inspection system comprising: a conveying line for conveying a long-belt-shaped film; a defect inspection apparatus for inspecting defects of the film conveyed on the conveying line; and a recording apparatus for obtaining a result of the defect inspection The defect information is recorded on the film conveyed on the conveying line, wherein the recording device is provided with: a printing head, which prints the defect information on the recording area along the edge of the film; meandering of the film; and a head operation unit for moving the printing head relative to the film in a direction intersecting with the conveying direction of the film, and the meandering detection unit has a head operating unit having an operation that intersects the conveying direction of the film A plurality of sensors are arranged and arranged in the direction, the plurality of sensors are located at a position that is more inward in the width direction of the film than the printing head, and the head operation part is matched with the detection of the meandering detection part. The meandering of the film moves the printing head to a position opposite to the recording area. The defect inspection system according to claim 1, wherein the head operating section performs an operation for moving the plurality of sensors and the printing head integrally in a direction intersecting the conveying direction of the film. The defect inspection system according to claim 2, wherein, when the print head is located at a position opposite to the recording area, at least one adjacent one of the plurality of sensors senses A different signal is detected between the sensor and the sensor on the other side. The defect inspection system according to claim 2, wherein the meandering detection section includes: at least one or a plurality of light sources for irradiating the film with light; and the sensor is disposed so as to be spaced apart from the light source. The aforesaid film is opposite to a plurality of photosensitive elements. The defect inspection system according to claim 3, wherein the meandering detection section includes: at least one or a plurality of light sources for irradiating light to the film; and as the sensor disposed so as to be separated from the light source The aforesaid film is opposite to a plurality of photosensitive elements. A film manufacturing apparatus including the defect inspection system described in any one of claims 1 to 5 of the scope of application. A film manufacturing method, comprising: a process of performing defect inspection using the defect inspection system described in any one of claims 1 to 5 of the patent application. A printing device for printing in a recording area along an edge portion of the film during conveyance of a long strip-shaped film, comprising: a printing head for printing the film; a meandering detection part, The meandering of the film is detected; and the head operation part is used to move the printing head relative to the film. For the operation of moving the ground in a direction intersecting with the conveying direction of the film, the meandering detection unit has a plurality of sensors arranged in a direction intersecting with the conveying direction of the film, and the plurality of sensors are located at The head operating portion moves the print head to a position opposite to the recording area in accordance with the meandering of the film detected by the meandering detection portion at a position further inward in the width direction of the film than the printhead. A printing method, which uses a printing head to perform printing on a recording area along an edge portion of the film during conveying a long strip-shaped film, comprising: detecting the meandering process of the film; cooperating with the detection A process of moving the printing head relative to the film to a position opposite to the recording area by meandering of the outgoing film; and a process of using the printing head to print in the recording area; the detection of the film In the process of meandering, a plurality of sensors are used to detect the meandering of the film according to the magnitude of the signals of the plurality of sensors, wherein the plurality of sensors are located at a position closer to the film than the printing head. The position on the inner side in the width direction of the film is arranged in a row in a direction intersecting with the conveying direction of the film.

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