TW201903393A - Defect inspection system, film manufacturing device, film manufacturing method, printing device, and printing method - Google Patents

Abstract

An objective of the present invention is to provide a defect inspection system capable of reducing the influence of fluttering occurring in a film being conveyed and appropriately recording defect information on the film. A defect inspection system includes a conveying line for conveying a long strip-shaped film, a defect inspection device for inspecting defect inspection of the film being conveyed by the conveying line, and a recording device 13 for recording defect information based on the result of the defect inspection on the film F105 being conveyed by the conveying line, wherein the recording device 13 has a printing head 13a for printing defect information by ejecting ink i on a recording area along an edge portion of the film F105, and the printing head 13a is disposed to face a guide roller 153c which is in contact with the film F105.

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 device, 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 unevenness defects. Information related to the location and type of the defect (hereinafter referred to as defect information) is recorded on the optical film by printing a barcode on the end of the optical film or by marking on the defect portion. When the winding amount of the optical film wound around the core material reaches a certain amount, it is cut off from the upstream optical film and shipped as a roll of the optical film. For example, Patent Document 1 discloses a defect inspection system equipped with a defect inspection device on a transport line of an optical film and a recording device that records defect information on the film.

    [Prior technical literature]         [Patent Literature]    

[Patent Document 1] Japanese Patent Laid-Open No. 2011-7779

However, when the defect inspection system described above records defect information on the optical film, the optical film may be slammed during transportation due to the state of the optical film, the transportation conditions, and the like. If such a popping of the optical film occurs, it is necessary to use the defect information printed on the ink ejected from the printing head, and it will not be recorded correctly in the recording area along the edge of the optical film, and the print will not be clear. (Printing error).

The present invention has been made in view of the conventional problems described above, and an object thereof is to provide a defect inspection system capable of reducing the influence caused by popping of a film during transportation and appropriately recording defect information on the film. Film manufacturing device, film manufacturing method, printing device, and printing method.

As a means for solving the above-mentioned problems, according to an aspect of the present invention, there is provided a defect inspection system including: a conveying line for conveying a long-belt-shaped film; and a defect inspection device for performing defects on the film conveyed on the conveying line. Inspection; and a recording device that records defect information obtained based on the results of the defect inspection on a film conveyed on the transfer line, wherein the recording device has a print head, and the print head prints the defect information to The printing head faces the recording area of the edge portion of the film, and the printing head is disposed to face the guide roller in contact with the film, and performs printing from the side opposite to the side where the film and the guide roller are in contact.

In the defect inspection system of the foregoing aspect, the film may be configured to be wound around the outer peripheral surface of the guide roller in an angle range of 40 ° to 130 °.

In the defect inspection system of the aforementioned aspect, the printing head may be configured to print the defect information by ejecting ink to a recording area of the film.

In the defect inspection system of the foregoing aspect, the recording device may have a cover that prevents ink from adhering to an area of the film that is at least closer to the inside than the recording area.

The above-mentioned defect inspection system may be configured to include a static electricity removing device that is located closer to the upstream side than the recording device in the conveyance direction of the film and is used to remove electricity from the surface of the film.

Moreover, according to one aspect of this invention, the film manufacturing apparatus provided with the defect inspection system of any one of the above-mentioned forms is provided.

Furthermore, according to an aspect of the present invention, there is provided a film manufacturing method including a step of performing a defect inspection using the defect inspection system of any one of the foregoing forms.

Furthermore, according to an aspect of the present invention, a printing device is provided. The printing device is provided with a printing head that prints information to the film during conveyance of the long-belt-shaped film, and the printing head is in contact with the film. The rollers are arranged to face each other, and printing is performed from the side opposite to the position where the film and the guide roller contact.

In addition, according to an aspect of the present invention, a printing method is provided. The printing method includes a step of printing information onto the film by using a printing head during conveyance of the long strip-shaped film, wherein the printing head and the film The contacting guide rollers are arranged facing each other, and printing is performed from the opposite side of the position where the film and the guide rollers contact.

As described above, according to aspects of the present invention, it is possible to provide a defect inspection system, a film manufacturing apparatus, and a film inspection device that can reduce the influence caused by the popping of the film during transportation, and can appropriately record defect information on the film. Film manufacturing method, printing device and printing method.

10‧‧‧ Defect inspection system

11‧‧‧The first defect inspection device

12‧‧‧Second Defect Inspection Device

13‧‧‧Recording device

13a‧‧‧printing head

14‧‧‧The first length measuring device

15‧‧‧Second length measuring device

16‧‧‧Control device

21a, 22a, 23a, 24a, 25a

21b, 22b, 23b, 24b, 25b

30‧‧‧ cover

30a‧‧‧First side plate

30b‧‧‧Second side plate section

30c‧‧‧The third side plate

30d‧‧‧Fourth side plate

31‧‧‧ cover

32‧‧‧ cover

32a‧‧‧Window

40‧‧‧ static elimination device

100‧‧‧ film manufacturing equipment

101‧‧‧The first transfer line

102‧‧‧Second Transfer Line

103‧‧‧ Third Transfer Line

104‧‧‧Fourth Transfer Line

105‧‧‧Fifth transfer line

106‧‧‧ Take-up Department

111a, 111b‧‧‧The first nip roller

112‧‧‧The first accumulator

112a, 112b‧‧‧ First tension adjusting roller

113‧‧‧first guide roller

121a, 121b‧‧‧Second nip roller

122‧‧‧Second Accumulator

122a, 122b‧‧‧Second tension adjusting roller

123a, 123b‧‧‧Second guide roller

131a, 131b‧‧‧ Third pinch roller

141a, 141b‧‧‧ Fourth pinch roller

142‧‧‧Third Accumulator

142a, 142b‧‧‧Third tension adjustment roller

143a, 143b‧‧‧ Fourth guide roller

151a, 151b‧‧‧ fifth pinch roller

152‧‧‧Fourth Accumulator

152a, 152b‧‧‧ Fourth tension adjustment roller

153a‧‧‧Fifth guide roller

153b‧‧‧ Sixth guide roller

153c‧‧‧Seventh guide roller

P‧‧‧LCD panel (optical display device)

F1X‧‧‧Optical Film

F10X‧‧‧Optical Film

F101‧‧‧first film

F102‧‧‧Second film

F103‧‧‧Third film

F104‧‧‧Single-sided laminating film

F105‧‧‧Laminated film on both sides

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.

Fig. 3 is a 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 side view showing an example of a recording device.

Fig. 6 shows an example of masking. Fig. 6 (a) is a plan view of the mask viewed from the upper side of the film, and Fig. 6 (b) is a side view of the mask viewed from the upstream side of the film. Fig. 6 ( c) A side view of the cover as seen from the outside of the film.

Fig. 7 is a plan view showing a modification of the mask.

Fig. 8 shows a modification of the mask, Fig. 8 (a) is a perspective view of the mask, and Fig. 8 (b) is a side view of the mask.

Fig. 9 shows another embodiment of the covering, Fig. 9 (a) is a plan view of the covering, and Fig. 9 (b) is a side view of the covering.

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

In this embodiment, a film production apparatus constituting a part of the production system of an optical display device and a film production method using the film production apparatus will be described.

The film manufacturing apparatus manufactures, for example, a polarizing film, a retardation film, a brightness enhancement film, and the like, which are bonded to a panel-shaped optical display element (optical display panel) such as a liquid crystal display panel or an organic EL display panel. Device for film-like optical components (optical films). The film production apparatus constitutes a part of a production system for producing an optical display device including such an optical display element and an optical component.

In this embodiment, a transmissive liquid crystal display device is used as an example of the optical display device. A transmissive liquid crystal display device generally includes a liquid crystal display panel and a backlight. In this liquid crystal display device, the illumination light emitted from the backlight is made 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 surface 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 for the optical display device. FIG. 1 is a plan view showing the configuration of the liquid crystal display panel P. Fig. 2 is a sectional view of the liquid crystal display panel P taken along the section line A-A shown in Fig. 1. In FIG. 2, the hatching of the cross section is omitted.

As shown in FIGS. 1 and 2, the liquid crystal display panel P is roughly provided with a first substrate P1, a second substrate P2 disposed opposite to the first substrate P1, and a liquid crystal display panel P disposed between the first substrate P1 and the second substrate P2. The liquid crystal layer P3.

The first substrate P1 is composed of a transparent substrate that is rectangular in a plan view. The second substrate P2 is composed of a rectangular transparent substrate smaller than the first substrate P1. The periphery between the first substrate P1 and the second substrate P2 is sealed with a sealing material (not shown), and the liquid crystal layer P3 is disposed inside a region surrounded by the sealing material and rectangular in a plan view. In the liquid crystal display panel P, a region restricted to the inner side of the outer periphery of the liquid crystal layer P3 in a plan view is a display region P4, and a region surrounded on the outer side of the periphery of the display region P4 is a frame edge portion G.

A first film F11 as a polarizing film is bonded to the back surface (backlight side) of the liquid crystal display panel P. On the surface (display surface side) of the liquid crystal display panel P, a second film F12 as a polarizing film and a third film F13 as a brightness enhancement film which is laminated and bonded to the second film F12 are bonded. Hereinafter, the first film, the second film, and the third film F11, F12, and F13 are collectively referred to as an 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. Fig. 3 is a sectional view showing the configuration of the optical sheet FX. In FIG. 3, the hatching of the cross section is omitted.

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

In the case of the polarizing film, for example, the base material 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 attaching an optical sheet (optical film F1X) to the liquid crystal display panel P. The separator F6 is a film that protects the adhesive layer F5, and is separated from the adhesive layer F5 before the optical sheet (optical film F1X) is adhered to the liquid crystal display panel P. Hereinafter, a portion where the optical film F1X of the separator F6 has been removed is referred to as a bonding sheet F8. The surface protection sheet F7 is a film for protecting the surface of the substrate sheet F4. The surface protection sheet F7 is peeled 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. .

The base material sheet F4 may have a configuration in which any one of the pair of protective films F4b and F4c is 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 side of the surface protective sheet F7 may be subjected to, for example, a hard coating treatment to protect the outermost portion of the liquid crystal display panel P, an antiglare treatment to obtain an antiglare effect, and the like. Surface treatment. In addition, the base material sheet F4 is not limited to the above-mentioned laminated structure sheet, and may be a single-layer structure sheet. The surface protection sheet F7 may be omitted.

    (Film manufacturing apparatus and method)    

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

As shown in FIG. 4, the film manufacturing apparatus 100 is, for example, a long strip-shaped second film F101 that is a polarizing film and is adhered to a long strip-shaped second film F102 that is a surface protective film. The other side of F101 is bonded to a third long-belt-shaped third film F103 of a surface protection film. In this way, a device in which an optical film F10X in which a second film F102 and a third film F103 are bonded on both sides of the first film F101 is manufactured.

Specifically, the film manufacturing apparatus 100 generally includes a first transfer line 101, a second transfer line 102, a third transfer line 103, a fourth transfer line 104, a fifth transfer line 105, and a winding unit 106.

Among them, the first conveying line 101 forms a conveying path for conveying the first film F101, the second conveying line 102 forms a conveying path for conveying the second film F102 pulled out from the first roll R1, and the third conveying line 103 forms The single-sided laminating film F104 is conveyed on one side of the first film F101 after the second film F102 is attached. The fourth conveying line 104 forms a conveying path for the third film F103 pulled out from the second roll R2. The fifth conveying line 105 forms a two-sided bonding film F105 (optical film F10X) after the third film F103 is bonded to the first film F101 side of the single-sided bonding film F104 (the other side of the first film F101). ). The manufactured optical film F10X is wound around a core material at a winding unit 106 to form a third roll R3.

The first transfer line 101 is a method in which, for example, PVA (polyvinyl alcohol: Polyvinyl Alcohol) is used as a base material of a polarizer to apply a dyeing treatment, a crosslinking treatment, a stretching treatment, and the like, and then TAC (three The long film-like first film F101 obtained from a protective film such as cellulose acetate: Triacetylcellulose) is transferred to the third transfer line 103.

Specifically, a pair of first nip rollers (in a horizontal direction) are arranged in this order on the first conveying line 101, starting from one side upstream of the third conveying line 103 toward the third conveying line 103. 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 pinch rolls 111a and 111b sandwich the first film F101 in the middle and rotate in the opposite direction at the same time, thereby pulling the first film F101 in the direction of the arrow (right) shown in FIG. 4.

The first accumulator 112 is used to absorb a difference caused by a change in the feed amount of the first film F101 and reduce a change in the tension applied to the first film F101. Specifically, the first accumulator 112 includes a plurality of tension adjustment rollers 112a on the upper side and a plurality of tension adjustment rollers 112b on the lower side between the first nip rollers 111a, 111b and the first guide roller 113. Arrangement configuration.

The first accumulator 112 is a state in which the first film F101 alternately bypasses the tension adjustment roller 112a on the upper side and the tension adjustment roller 112b on the lower side, and the first film F101 is conveyed while the upper film The tension adjustment roller 112a and the tension adjustment 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 transfer line 101. For example, if the first accumulator 112 increases the distance between the upper tension adjusting roller 112a and the lower tension adjusting roller 112b, the accumulation of the first film F101 can be increased, and conversely, the upper tension adjusting roller 112a is increased. By reducing the distance from the lower tension adjusting roller 112b, the accumulation of the first film F101 can be reduced. The first accumulator 112 is moved, for example, during operations such as the connection of the sheets after the core materials of the rolls R1 to R3 are replaced.

The first guide roller 113 is rotated to guide the first film F101 pulled and conveyed by the first nip rollers 111 a and 111 b 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 disposed, and may be a configuration in which a plurality of first guide rollers are disposed.

The second conveying line 102 is a long strip-shaped second film F102 such as PET (Polyethylene Terephthalate) as a surface protection film is pulled out from the first roll R1, The third transfer line 103 transfers.

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

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

The second accumulator 122 is used to absorb a difference caused by a change in the feed amount of the second film F102 and reduce a change in the tension applied to the second film F102. Specifically, the second accumulator 122 includes a plurality of tension adjusting rollers 122a on the upper side and a plurality of tension adjusting rollers 122b on the lower side between the second nip rollers 121a, 121b and the second guide roller 123a. Arrangement configuration.

The second accumulator 122 is a state in which the second film F102 alternately bypasses the tension adjustment roller 122a on the upper side and the tension adjustment roller 122b on the lower side, and the second film F102 is conveyed while the upper film The tension adjustment roller 122a and the tension adjustment roller 122b on the lower side relatively move up and down in the vertical direction. In this way, the second film F102 can be accumulated without stopping the second transfer line 102. For example, if the second accumulator 122 increases the distance between the upper tension adjusting roller 122a and the lower tension adjusting roller 122b, the accumulation of the second film F102 can be increased, and conversely, the upper tension adjusting roller 122a is increased. By reducing the distance from the lower tension adjusting roller 122b, the accumulation of the second film F102 can be reduced. The second accumulator 122 is moved, for example, during operations such as the connection of the sheets after the core materials of the rolls R1 to R3 are replaced.

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

The third transfer line 103 transfers a long-strip single-sided bonding film F104 formed by bonding the second film F102 to one side of the first film F101 to the fifth transfer line 105.

Specifically, a pair of third pinch rollers 131 a and 131 b are arranged on the third transfer line 103. A pair of third pinch rollers 131a and 131b are located at a confluence point of the downstream side of the first conveying line 101 and the downstream side of the second conveying line 102, sandwiching the first film F101 and the second film F102 in the middle and facing in opposite directions at the same time By rotating, the single-sided bonding film F104 formed by bonding the first film F101 and the second film F102 together is pulled in the direction of the arrow (below) shown in FIG. 4.

The fourth transfer line 104 is a long strip-shaped third film F103, such as PET (Polyethylene Terephthalate), which is a surface protective film, is pulled out from the second roll R2, and is transferred to the fifth transfer line 105.

Specifically, on the fourth conveying line 104, a pair of fourth pinch rollers 141a are sequentially arranged in the horizontal direction from one side downstream of the third conveying line 103 toward the third conveying line 103. 141b, a third accumulator 142 including a plurality of third tension adjusting rollers 142a, 142b, and a plurality of fourth guide rollers 143a, 143b.

A pair of fourth nip rollers 141a and 141b rotate the third film F103 in the direction of the arrow shown in Fig. 4 (right side) while sandwiching the third film F103 in the middle and rotating in opposite directions. Pull.

The third accumulator 142 is used to absorb the difference caused by the change in the feed amount of the third film F103 and reduce the change in the tension applied to the third film F103. Specifically, the third accumulator 142 has a plurality of tension adjustment rollers 142a on the upper side and a plurality of tension adjustment rollers 142b on the lower side between the fourth nip rollers 141a, 141b and the fourth guide roller 143a. Arrangement configuration.

The third accumulator 142 causes the third film F103 to alternately bypass the upper tension adjusting roller 142a and the lower tension adjusting roller 142b, and while carrying the third film F103, the upper film The tension adjustment roller 142a and the lower tension adjustment roller 142b relatively move up and down in the vertical direction. In this way, the third film F103 can be temporarily accumulated without stopping the fourth transfer line 104. For example, when the third accumulator 142 increases the distance between the upper tension adjusting roller 142a and the lower tension adjusting roller 142b, the accumulation of the third film F103 can be increased, and conversely, the upper tension adjusting roller 142a is increased. By reducing the distance from the lower tension adjusting roller 142b, the accumulation of the third film F103 can be reduced. The third accumulator 142 is moved, for example, during operations such as the connection of the sheets after the core materials of the rolls R1 to R3 are replaced.

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

The fifth conveying line 105 is a long strip-shaped double-sided lamination film F105 (the other surface of the first film F101) (the other side of the first film F101) is bonded to the surface of the first film F101 side of the single-sided lamination film F104 ( The optical film F10X) is conveyed to the third roll R3.

Specifically, on the fifth conveying line 105, a pair of fifth pinch rollers are arranged in a horizontal direction from the other side downstream of the third conveying line 103 toward the third roll 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 tension adjustment rollers 152a, 152b, and a sixth guide roller 153b.

A pair of fifth pinch rollers 151a and 151b are located at the confluence point of the downstream side of the third conveying line 103 and the upstream side of the fifth conveying line 105, sandwiching the single-sided laminating film F104 and the third film F103 at the same time. Turn in the opposite direction, thereby pulling the two-sided bonding film F105 formed by bonding the single-sided bonding film F104 and the third film F103 to the direction (downward) of the arrow shown in FIG. 4.

The fifth guide roller 153a is rotated to guide the double-sided bonding film F105 pulled and transported by the fifth nip rollers 151a and 151b to the fourth accumulator 152. The fifth guide roller 153a is not limited to a configuration in which only one is disposed, and may be a configuration in which a plurality of fifth guide rollers 153a are disposed.

A pair of sixth pinch rollers 151c and 151d sandwich the two-sided bonding film F105 in the middle and turn them in opposite directions, thereby turning the two-sided bonding film F105 in the direction of the arrow shown in FIG. 4 (right Party) pull.

The fourth accumulator 152 is a state where the double-sided bonding film F105 alternately bypasses the upper tension adjusting roller 152a and the lower tension adjusting roller 152b, and conveys the double-sided bonding film F105 while moving the upper portion The tension adjusting roller 152a on the side and the tension adjusting roller 152b on the lower side relatively move up and down in the vertical direction. In this manner, the double-sided bonding film F105 can be accumulated without stopping the fifth conveyance line 105. For example, if the fourth accumulator 152 increases the distance between the tension adjusting roller 152a on the upper side and the tension adjusting roller 152b on the lower side, the accumulation of the double-sided bonding film F105 can be increased, and conversely, the tension adjusting roller on the upper side can be increased. By reducing the distance between 152a and the tension adjusting roller 152b on the lower side, the accumulation of the double-sided bonding film F105 can be reduced. The fourth accumulator 152 is moved, for example, during operations such as the connection of the sheets after the core materials of the rolls R1 to R3 are replaced.

The sixth guide roller 153b is rotated to guide the double-sided bonding film F105 to the third roll R3. The sixth guide roller 153b is not limited to a configuration in which only one is arranged, and may be a configuration in which a plurality of sixth guide rollers 153b are arranged.

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

    (Defect inspection system)    

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

As shown in FIG. 4, the defect inspection system 10 roughly includes a transfer line L, a first defect inspection device 11 and a second defect inspection device 12, a recording device 13, a first length measuring device 14, and a second length measuring device 15. And control device 16.

The transfer line L forms a transfer path for transferring the film to be inspected. In this embodiment, the transfer line L is composed of the first transfer line 101, the third transfer line 103, and the fifth transfer line 105.

The first defect inspection device 11 is a device that inspects the defects of the first film 101 before the second film F102 and the third film F103 are bonded together. Specifically, the first defect inspection device 11 detects various defects such as foreign object defects, uneven defects, bright spot defects, and the like that occur when the first film F101 is manufactured and when the first film F101 is transported. The first defect inspection device 11 performs inspection processing such as reflection inspection, transmission inspection, oblique transmission inspection, crossed Nichol transmission inspection, and the like on the first film F101 transported on the first transport line 101. To detect a defect of the first film F101.

The first defect inspection device 11 is located on the first conveying line 101 closer to the upstream side than the first nip rollers 111a and 111b, and includes a plurality of illumination sections 21a, 22a, and 23a that irradiate light to the first film F101, and detection. A plurality of light detecting sections 21b, 22b, 23b of light (transmitted light) transmitted through the first film F101 or light (reflected light) reflected by the first film F101.

In this embodiment, the structure for detecting transmitted light is a plurality of illumination units 21a, 22a, and 23a and a plurality of light detection units which are arranged opposite to each other across the first film F101 in the conveying direction of the first film F101. 21b, 22b, 23b. In addition, the first defect inspection device 11 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.

The illuminating sections 21a, 22a, and 23a irradiate the first film F101 with illumination light whose light intensity, wavelength, and polarization state have been adjusted according to the type of defect inspection. The light detecting sections 21b, 22b, and 23b use an imaging element such as a CCD to capture an image of the position of the first film F101 that is irradiated with the illumination light. The images (defect inspection results) captured by the light detection sections 21 b, 22 b, and 23 b are output to the control device 16.

The second defect inspection device 12 is a device for performing a defect inspection of the first film 101 after bonding the second film F102 and the third film F103, that is, the two-sided bonding film F105. Specifically, the second defect inspection device 12 detects foreign matter generated when the first film F101 is bonded to the second film F102 and the third film F103, and when the single-sided bonded film F104 and the double-sided bonded film F105 are transported. Various defects such as defects, bump defects, and bright spot defects. The second defect inspection device 12 detects the inspection process such as reflection inspection, transmission inspection, oblique transmission inspection, orthogonal polarization transmission inspection, and the like on the double-sided bonding film F105 conveyed on the fifth conveying line 105. Defects of film F105 on both sides.

The second defect inspection device 12 is located on the fifth conveying line 105 closer to the downstream side than the fifth nip rollers 151a and 151b. The second defect inspection device 12 has a plurality of illumination sections 24a and 25a for irradiating light to the double-sided bonding film F105 and detecting transmission A plurality of light detecting portions 24b and 25b pass through the light (transmitted light) passing through the two-sided bonding film F105 or the light (reflected light) reflected by the two-sided bonding film F105.

In this embodiment, the structure for detecting transmitted light is arranged in the conveying direction of the double-sided bonding film F105 in a plurality of illuminating sections 24a, 25a and a plurality of light detecting sections facing each other across the double-sided bonding film F105. 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.

The illuminating sections 24a and 25a irradiate the illuminating light whose light intensity, wavelength, and polarization state are adjusted according to the type of defect inspection to the double-sided bonding film F105. The light detecting sections 24b and 25b use an imaging element such as a CCD to capture an image of a position where the double-sided bonding film F105 is irradiated with the illumination light. The images (defect inspection results) captured by the light detection units 24 b and 25 b are output to the control device 16.

    (Printing device and printing method)    

The recording device 13 is a device (printing device) that records defect information obtained based on the results of defect inspection 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 about the position and type of the defect, and is recorded (printed) in the form of an identification code such as a barcode, a two-dimensional barcode, a QR code (registered trademark), and the like. The identification code contains, for example, information indicating how far the defect detected by the first defect inspection device 11 and the second defect inspection device 12 is located at a distance from the position where the identification code is printed in the width direction of the film. Location-related information). The identification code may also contain information related to the type of defect detected. In this embodiment, the defect information printed is a two-dimensional bar code of 7 mm × 7 mm.

The recording device 13 is provided on the fifth transfer line 105 closer to the downstream side than the second defect inspection device 12. The recording device 13 includes a print head 13a using, for example, an inkjet method. In addition, a seventh guide roller 153c is disposed at a position facing the print head 13a so as to be in contact with the double-sided bonding film F105. The printing head 13a ejects ink from the opposite side of the double-sided bonding film F105 to the seventh guide roller 153c at a position (recording area) along the widthwise edge of the double-sided bonding film 105, and Print out the above defect information.

The recording device 13 can also directly record on the defect site by printing dot, line, or frame-shaped markings on the defect site of the double-sided bonding film F105 to include the defect therein. At this time, in addition to the mark, information related to the type of the defect may be recorded by printing a mark or pattern indicating the type of the defect.

The first length measuring device 14 and the second length measuring device 15 are devices for measuring the conveyance amount of the first film F101. Specifically, in the present embodiment, a rotary encoder constituting the first length measuring device 14 is arranged on the first conveying line 101 and the first pinch roller 111 a located upstream of the first accumulator 112. And a third encoder 131a located downstream of the first accumulator 112 is provided with a rotary encoder constituting the second length measuring device 15.

The first length measuring device 14 and the second length measuring device 15 use a rotary encoder to measure the first film according to the rotational displacement of the first nip roller 111a and the third nip roller 131a that are rotated by contact with the first film F101. F101 transportation amount. 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, since there is only one accumulator between the first defect inspection device 11 and the recording device 13, a length measuring device is disposed on each of the upstream side and the downstream side of the accumulator. On the other hand, in the case where there are a plurality of accumulators between the first defect inspection device 11 and the recording device 13, as long as one is disposed on each of the upstream side of the most upstream accumulator and the downstream side of the most downstream accumulator A length measuring device is sufficient.

The control device 16 system includes a device 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. The computer system generally includes a calculation processing unit such as a CPU, and an information storage unit such as a memory and a hard disk.

The information storage section of the control device 16 stores an operating system (OS) for controlling a computer system, a program for causing the calculation processing section to perform various processes required by each section of the film manufacturing apparatus 100, and the like. The control device 16 may include a logic circuit such as an ASIC that performs various processes necessary for controlling the respective sections of the film manufacturing apparatus 100. In addition, the control device 16 includes an interface for inputting and outputting a computer system and an external device. 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 light detection units 21b, 22b, 23b and 24b, 25b, and determines the presence (position) and type 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 in such a manner that a deviation between the defect inspection position of the double-sided bonding film F105 and the information recording position of the defect information does not occur. For example, in the present embodiment, the transport amount of the film transported on the transport line L after the time when the defect inspection is performed by the first defect inspection apparatus 11 or the second defect inspection apparatus 12 is calculated, and the calculated transport amount and offset are calculated. When the offset distances match, the recording device 13 is caused to perform recording.

Here, the offset distance refers to a film transport distance 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 defined as the position where the first defect inspection device 11 and the second defect inspection device 12 perform defect inspection (defect inspection position) and the position where the recording device 13 records defect information (information recording position). Transport distance between the films. The offset distance changes when the first accumulator 112 is moved.

The offset distance (hereinafter referred to as the first offset distance) when the first accumulator 112 is not moved is stored in the information storage section of the control device 16 in advance. Specifically, the first defect inspection device 11 and the second defect inspection device 12 include a plurality of light detection sections 21b, 22b, 23b and 24b, 25b. Each of the light detection sections 21b, 22b, 23b, 24b, 25b are all inspected for defects. Therefore, the information storage section of the control device 16 stores the first offset distances for each of the light detection sections 21b, 22b, 23b, 24b, and 25b, respectively.

When the offset distance varies due to the movement of the first accumulator 112, the correction value of the offset distance is calculated based on the difference between the conveyance amounts of the first film F101 on the upstream side and the downstream side 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 the accumulation amount of the first film F101 To calculate the correction value of the offset distance.

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

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

In addition, in this embodiment, when the first accumulator 112 is moved, in addition to the defect information, information on the double-sided laminated film F105 may be recorded to indicate that the first accumulator 112 is moved (hereinafter referred to as the accumulator movement information). ). When the accumulator motion information is also recorded, the operator can carefully check the defect position of the part on which the accumulator motion information is printed, so that deviations in the recording position can be detected. 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 according to this embodiment, due to the state of the double-sided bonding film F105, the transportation conditions, and the like, the double-sided bonding film F105 may be snapped during transportation. In particular, both ends in the width direction of the film F105 on both sides are easily curled due to moisture absorption or drying conditions of the film, and this curl is thought to be one of the causes of popping during transportation.

In view of this, as shown in FIG. 5, the defect inspection system 10 of the present embodiment is configured such that the print head 13 a faces the seventh guide roller 153 c that is in contact with the above-mentioned double-sided bonding film F105.

This makes it possible to suppress the popping of the double-sided bonding film F105 at the position in contact with the seventh guide roller 153c even in the case where both ends of the double-sided bonding film F105 in the width direction are transported. . Therefore, the defect inspection system 10 of this embodiment can appropriately record (print) the defect information to be printed on the recording area of the double-sided bonding film F105 by using the ink i ejected from the print head 13a.

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 so-called “surrounding angle” in this embodiment refers to the angular range where the film contacts the outer peripheral surface of the guide roller in the circumferential direction with 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 caused by the sliding of the double-sided bonding film F105, it is preferable to set the surrounding angle θ to 40 ° or more. On the other hand, when the surrounding angle θ exceeds 130 °, it is easy to bite air bubbles between, for example, the second and third films F102 and F103, which are surface protection films, and the first film F101. Therefore, in order to prevent such bubbles from being bitten, it is preferable to set the surrounding angle θ to 130 ° or less.

When the tension applied to the double-sided bonding film F105 is low, the surrounding angle θ is preferably more than 90 °, and more preferably 95 ° or more. In this way, the popping of the 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 surrounding angle θ is preferably less than 90 °, and more preferably 85 ° or less. In this way, it is possible to prevent the double-sided bonding film F105 from coming into close contact with the outer peripheral surface of the seventh guide roller 153c.

The conveyance speed of the double-sided bonding film F105 is usually about 9 to 35 m / min. The tension applied to the double-sided bonding film F105 is about 400 to 1500 N in the drying furnace, and about 200 to 500 N in the outside of the drying furnace. The smaller the tension applied to the double-sided bonding film F105, the more likely it is that popping will occur. The width of the double-sided bonding film F105 is about 500 to 1500 mm. The larger the width of the double-sided bonding film F105, the more likely it is that popping will occur. The thickness of the double-sided bonding film F105 is about 13 to 300 μm. The thinner the thickness of the double-sided bonding film F105 is, the more likely it is that popping occurs.

The outer diameter of the seventh guide roller 153c is preferably in the range of 100 to 150 mm. The outer diameter of the seventh guide roller 153c becomes larger, and the area of the two-sided bonding film F105 that is in contact with the outer peripheral surface of the seventh guide roller 153c around the angle θ becomes larger. Therefore, it is possible to suppress the popping of the double-sided laminated film F105 and stabilize the recording area. However, the larger the outer diameter of the seventh guide roller 153c is, the more easily the above-mentioned scratches or bite of air bubbles occur, so it is preferably within the above-mentioned range.

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

The surface roughness (maximum roughness Ry) of the outer peripheral surface of the seventh guide roller 153c is preferably 100s or less, and more preferably 25s or less. In this way, it is possible to suppress the occurrence of the above-mentioned scratches or biting of air bubbles.

In addition, the defect inspection system 10 of this embodiment can add a guide roller in contact with the double-sided laminated film F105 in order to suppress the popping of the double-sided laminated film 105 on the upstream and downstream sides of the seventh guide roller 153c. . 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 the additional guide roller. It is preferable to have a surrounding angle with respect to the guide roller added to the upstream side, and it is better to have a surrounding angle with respect to the guide roller added to the upstream side and the downstream side.

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

As shown in FIGS. 6 (a) to (c), 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 of the double-sided bonding film F105 other than the recording area S. region. Fig. 6 (a) is a plan view of the cover 30 as viewed from the upper side of the double-sided bonding film F105, and Fig. 6 (b) is a side view of the cover 30 as viewed from the upstream side of the transport direction of the double-sided bonding film F105. Fig. 6 (c) is a side view of the cover 30 as viewed from the outside of the double-sided bonding film F105.

Specifically, the cover 30 includes a first side plate portion 30a which covers a side of the space K facing the double-sided bonding film F105 and the print head 13a facing the inside of the double-sided bonding film F105, and covers both sides. The second side plate portion 30b on the upstream side in the conveying direction of the bonding film F105 and the third side plate portion 30c on the side facing the downstream side in the conveying direction of the double-sided bonding film F105.

The cover 30 is detachably attached to the print head 13a by means such as screw locking. The cover 30 opens the side of the space K that faces the outer side of the double-sided bonding film F105, so that it can be easily attached to and detached from the print head 13a.

The interval T between the surface of the cover 30 facing the double-sided bonding film F105 and the surface of the double-sided bonding film F105 is preferably 1 mm or less. By setting the interval T to be 1 mm or less, when the ink i ejected from the print head 13a is scattered to the surroundings, the scattered matter of the ink i is prevented from being scattered to the outside of the cover 30.

The scattered matter of the ink i includes, for example, the ink i ejected from the printing head 13a and scattered from the information recording position to the surrounding ink i, and attached to the double-sided bonding film F105 and scattered to the surrounding ink i.

The recording region S is located outside the region overlapping the display region P4 of the liquid crystal display panel P when the double-sided bonding film F105 is bonded to the liquid crystal display panel P. The recording area S is an area to be cut off before being attached to the liquid crystal display panel P.

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 bonding film F105 overlapping the display area P4, and the second side plate portion 30b is The scattering of the ink i is prevented from adhering to the upstream side in the conveying direction of the double-sided bonding film F105, and the third side plate portion 30c prevents the scattering of the ink i from being 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 mounted on the print head 13a and reused.

The film manufacturing apparatus 100 is preferably configured to include a static electricity removing device 40 that removes electricity from the surface of the double-sided laminated film F105. The static electricity removing device 40 is called an ionizer, and is disposed closer to the upstream side than the recording device 13 (printing head 13a) in the conveying direction of the double-sided bonding film F105. This static electricity removing device 40 blows ionized gas across the entire width direction of the double-sided bonding film F105 to remove static electricity generated on the surface of the double-sided bonding film F105.

Thereby, the film manufacturing apparatus 100 prevents the scattered matter 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 scattering of the ink i from adhering to the surface of the double-sided bonding film F105 by combining the cover 30 and the static elimination device 40 described above.

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

The present invention is not necessarily limited to the above-mentioned embodiments, and various changes can be added without departing from the gist of the present invention.

Specifically, the cover 30 may have a configuration in which at least the first side plate portion 30a is arranged among the three side plate portions 30a, 30b, and 30c. Thereby, it is possible to prevent the scattered matter of the ink i from adhering to the area overlapping the display area P4 of the double-sided bonding film F105.

As for the cover 30, as shown in FIG. 7, in addition to the three side plate portions 30a, 30b, and 30c, a fourth side plate covering the side facing the outside of the two-sided bonding film F105 may be used. The structure of the part 30d.

As for the recording device 13 described above, the lower end portion of the cover 31 attached to the print head 13a may be formed into a shape conforming to the outer shape of the guide roller 41 as shown in FIGS. 8 (a) and (b). Thereby, the space | interval T with the double-sided bonding film F105 can be made into 1 mm or less.

Further, as another embodiment of the present invention, a cover 32 as shown in, for example, FIGS. 9 (a) and (b) may be used. This cover 32 is made of a parallel flat plate-like plate material, and is arranged to face the double-sided bonding film F105 in a state close to the double-sided bonding film F105. A window (opening) 32a is provided at a position of the cover 32 facing the recording area S. With this configuration, the cover 32 covers areas other than the recording area S, and contamination of the double-sided bonding film F105 caused by scattering of the ink i while the double-sided bonding film F105 records defect information can be prevented. The cover 32 may be provided with the above-mentioned side plate portions 30a, 30b, 30c, and 30d. That is, the cover 32 may constitute a bottom plate portion covering the bottom surface of the cover 30.

Although the recording device 13 is configured to be disposed downstream of the second defect inspection device 12, the recording device 13 may be disposed downstream of the first defect inspection device 11. In this case, after the defect inspection using the first defect inspection device 11 is performed, the defect information using the recording device 13 may be recorded.

The recording device 13 is not limited to recording defect information after the defect inspection. For another example, a plurality of recording devices are arranged on a long-distance transport line, and distance information is recorded at a certain distance, and the distance is corrected based on the recorded distance information. The recording device for recording such distance information is, for example, disposed on the upstream side of the first defect inspection device 11.

Moreover, the film suitable for the present invention is not necessarily limited to the above-mentioned optical film such as a polarizing film, a retardation film, a brightness enhancement film, and the like, and the present invention can be extended to be recorded on the recording device 13 Of the film.

In addition to the above-mentioned inkjet method, the present invention can be applied to a non-contact type printing device and a printing method such as a laser method. In particular, the inkjet method is prone to generate aerosol of ink. Therefore, if the optical film is popped, it is easily affected and printing errors occur. The same is true for defect information. When printing complex information such as the two-dimensional barcode described above by inkjet, it is more likely to be affected by the popping of the optical film.

Claims (9)

    A defect inspection system includes: a conveying line for conveying a long-belt-shaped film; a defect inspection device for inspecting a defect of a film conveyed on the aforementioned conveying line; and a recording device for obtaining based on a result of the aforementioned defect inspection The defect information is recorded on the film conveyed on the conveying line, wherein the recording device has a printing head, and the printing head prints the defect information on a recording area along the edge of the film, and the printing head is connected with The guide rollers in contact with the film are arranged to face each other, and printing is performed from the side opposite to the side where the film and the guide rollers are in contact.         The defect inspection system according to item 1 of the scope of patent application, wherein the film is wound around the outer peripheral surface of the guide roller in an angle range of 40 ° to 130 °.         The defect inspection system according to item 1 or 2 of the scope of application for a patent, wherein the printing head prints the defect information by ejecting ink to a recording area of the film.         The defect inspection system according to claim 3, wherein the recording device has a cover that prevents the ink from adhering to an area of the film that is at least closer to the inside than the recording area.         The defect inspection system according to item 3 or 4 of the scope of patent application, further includes: a static electricity removing device, which is located closer to the upstream side than the recording device in the conveying direction of the film, and is used to inspect the film. Discharge the surface.         A film manufacturing apparatus includes the defect inspection system according to any one of claims 1 to 5 of a patent application scope.         A film manufacturing method includes a process of performing defect inspection using the defect inspection system according to any one of claims 1 to 5.         A printing device includes a printing head that prints information to the film during conveyance of a long-belt-shaped film, the printing head is disposed to face a guide roller that is in contact with the film, and is arranged from the film and the film. Printing is performed on the opposite side of the guide roller contact side.         A printing method includes a step of printing information onto the film using a printing head during conveyance of the long-belt-shaped film, wherein the printing head is arranged to face a guide roller in contact with the film, and the film is disposed from the film. Printing is performed on the side opposite to the position in contact with the guide roller.