TWI786173B - Defect recording system, film manufacturing system, and film manufacturing method - Google Patents

Abstract

The present invention provides a defect recording system capable of reducing the interval between a defect and a marking on a film and preventing occurrence of omission of recording of defect information of the film.

The defect recording system according to the present invention includes a inspection unit which is provided in a conveying path for film and inspects defects of a film, a printing unit which is provided downstream of the inspection unit in the conveying path and prints and records information on the film, and a control unit that controls the operation of the printing unit based on the result of the inspection unit, wherein the printing unit is provided to extend in a direction intersecting with the longitudinal direction, and includes an inkjet device that prints information, and a moving device that moves the inkjet device along the intersecting direction, the ink jet device having a plurality of injection holes, the plurality of injection holes being discretely arranged from one end to the other end of the film in the intersecting direction, and the control unit controlling the positional movement of the inkjet device caused by the moving device and the printing caused by the inkjet device based on the inspection result.

Description

Defect recording system, film manufacturing system, and film manufacturing method

The present invention relates to a defect recording system, a film manufacturing system, and a film manufacturing method.

For example, optical films such as polarizing films are inspected for defects such as foreign objects and unevenness, and then wound around a core material. At this time, there will be information about the defect position or type (hereinafter referred to as "defect information") belonging to the inspection result by printing a barcode on the end of the width direction of the optical film, or marking the defect position, and recorded in the The case of optical film.

For example, Patent Document 1 describes a technique for marking a defect (marking target) using a plurality of marking pens that can move in the width direction of an inspection object in sequence.

In addition, Patent Document 2 describes a technique for marking abnormalities on a web using a web marking tool in which two rows of inkjet modules are placed at different positions.

(Prior Art Literature) (patent documents)

Patent Document 1: Japanese Patent Laid-Open No. 2015-059804

Patent Document 2: Japanese Patent Laid-Open No. 2012-233917

Most of these defective parts are removed from the product and discarded. In the conventional method, in order to show the position of the defect, there are cases where a mark is applied to surround it. At this time, the optical film positioned between the defective portion and the mark may be discarded. Therefore, when the distance between the defective part and the mark is large, the loss of the optical film will increase. When the loss of the optical film is large, since the production cost becomes high, it is required to reduce the loss of the optical film. In order to reduce the loss of the optical film, it may be considered to reduce the distance between the defect site and the mark.

However, in the invention described in Patent Document 1, there is a concern that the movement of the marking pen does not match the interval, the interval between the marked object of the inspection object and the mark becomes large, or the recording omission of defect information of the inspection object occurs. .

Furthermore, in the invention described in Patent Document 2, the distance between the abnormality on the sheet and the marker is not sufficiently small. In addition, in order to reduce the interval, it is necessary to arrange the inkjet modules densely.

In addition, the above-mentioned problem is presumed to also occur in the defect inspection in the film other than an optical film.

The present invention was made in view of the above problems, and its object is to provide a defect recording system, a film manufacturing system, and a film manufacturing method. This method can reduce the gap between the film defect and the mark, and can suppress the recording omission of the film defect information.

In order to solve the above-mentioned problems, an aspect of the present invention provides a defect recording system that records information on defects of a film that is conveyed in the longitudinal direction, and has : The inspection department is installed on the conveying path of the film, and inspects the defects of the film; the printing department is arranged downstream of the inspection department in the conveying path, and records the printing information of the film; the control department is based on the inspection department The obtained inspection results are used to control the action of the printing section; the printing section has: an inkjet device, which is arranged to extend in a direction intersecting with the long side direction, and ejects ink to the film to print information; and a mobile device, which makes the inkjet The ink device moves along the crossing direction; the inkjet device has a plurality of ejection holes for ejecting ink, and the plurality of ejection holes are discretely arranged from one end of the film in the crossing direction to the other end, and the control unit is based on the inspection results. To control the position movement of the inkjet device performed by the mobile device and the printing performed by the inkjet device.

In one aspect of the present invention, it may also be set that the inkjet device has a plurality of inkjet heads arranged along the crossing direction, the inkjet heads respectively have injection holes, and the moving device makes the plurality of inkjet heads along the The structure in which the control unit independently controls the movement of a plurality of the inkjet heads as they move in the crossing direction.

In one aspect of the present invention, a plurality of inkjet heads are arranged in a plurality of rows set along the crossing direction, and two inkjet heads adjacent to each other in the crossing direction are respectively arranged in different positions. structure become.

In one aspect of the present invention, the inkjet device may include a first inkjet device and a second inkjet device arranged downstream of the first inkjet device in the conveyance path.

In one aspect of the present invention, at least one of the first inkjet device and the second inkjet device has a plurality of inkjet heads arranged in a crossing direction, and the inkjet heads each have an injection hole. , the moving device moves a plurality of inkjet heads in a crossing direction, and the control unit independently controls the movement of the plurality of inkjet heads.

In one aspect of the present invention, it may also be set that a plurality of inkjet heads are arranged in a plurality of rows set along the crossing direction, and two inkjet heads adjacent to each other in the crossing direction are respectively arranged in different positions. The composition of the columns.

In one aspect of the present invention, the first inkjet device may have a configuration in which a plurality of inkjet heads are arranged in a crossing direction.

In one aspect of the present invention, it may also be provided that it is arranged between the first inkjet device and the second inkjet device in the conveyance path and detects a printing defect caused by the first inkjet device. The detector and the control unit drive the second inkjet device based on the inspection result obtained by the inspection unit and the detection result of the sensor, so as to print information at the position corresponding to the printing failure.

In one aspect of the present invention, the ink ejected from the first inkjet device and the ink ejected from the second inkjet device may be different in color.

One aspect of the present invention is to provide a A conveying device for conveying a film in the longitudinal direction and a film manufacturing system of the above-mentioned defect recording system.

One aspect of the present invention provides a method of manufacturing a film using the above-mentioned film manufacturing system.

According to an aspect of the present invention, there is provided a defect recording system, a film manufacturing system, and a film manufacturing method capable of reducing the gap between a film defect and a mark and suppressing recording omission of film defect information.

1.2‧‧‧Defect recording system

11‧‧‧Defect inspection device

12‧‧‧Printing Department

13, 53, 55‧‧‧Inkjet device

14‧‧‧Mobile Device

15‧‧‧Length measuring device

16‧‧‧Control device

21a, 22a, 23a‧‧‧Lighting Department

21b, 22b, 23b‧‧‧light detection unit

24‧‧‧judgment department

31, 31A, 31B, 31C, 31D, 31E‧‧‧Inkjet head

31a‧‧‧Edge

32‧‧‧Injection hole

41‧‧‧Sensor

53A‧‧‧The first inkjet device

53B‧‧‧The second inkjet device

101‧‧‧film

101a‧‧‧one end

101b‧‧‧the other end

200‧‧‧Membrane Manufacturing System

201‧‧‧Conveying device

203‧‧‧Conveying roller

AR‧‧‧Range

D, D1, D2, D3, D4, D5‧‧‧Defects

F11‧‧‧polarizing film

L1‧‧‧column 1

L2‧‧‧column 2

M, M1, M2, M3, M4‧‧‧mark

P‧‧‧display panel

P1‧‧‧1st substrate

P2‧‧‧Second substrate

P3‧‧‧LCD layer

P4‧‧‧display area

PT1‧‧‧1st printing pattern

PT2‧‧‧2nd printing pattern

PT3‧‧‧3rd printing pattern

PT4‧‧‧4th printing pattern

R‧‧‧Transportation path

FIG. 1 is a plan view showing the structure of the liquid crystal display panel P. As shown in FIG.

Fig. 2 is a sectional view of II-II in Fig. 1 .

Fig. 3 is a perspective view showing the configuration of the film production system according to the first embodiment.

FIG. 4 is a plan view showing the structure of the inkjet device 13 .

FIG. 5 is a plan view showing the structure of the inkjet head included in the inkjet device 13 .

Fig. 6 is a schematic diagram showing an example of arrangement of marks M in the first embodiment.

Fig. 7 is a plan view showing the structure of the inkjet device according to the second embodiment.

Fig. 8 is a schematic diagram showing the operation of a plurality of inkjet heads in the second embodiment.

Fig. 9 is a plan view showing the structure of the inkjet device according to the third embodiment picture.

Fig. 10 is a perspective view showing the configuration of a film manufacturing system according to a fourth embodiment.

<First Embodiment>

Hereinafter, a film production system and a film production method according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 6 . In addition, in all of the following drawings, the dimensions, ratios, and the like of each component are appropriately set to be different in order to facilitate viewing of the drawings.

In addition, in the following description, the manufacturing method of the film which manufactures the optical film which comprises an optical display device is illustrated. And, the film manufacturing system used for this film manufacturing method is illustrated.

As an optical film manufactured by the film manufacturing method, a polarizing film, retardation film, brightness enhancement film, etc. are mentioned. For example, optical films are bonded to optical display components such as liquid crystal display panels and organic EL display panels.

[Optical display device]

As an optical display device to which the film produced by the production method of this embodiment is applied, a transmissive liquid crystal display device is exemplified. A 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 enters 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, whereby an image can be displayed .

The configuration of the liquid crystal display panel P will be described. No. 1 The figure is a top view showing the structure of the liquid crystal display panel P. As shown in FIG. Fig. 2 is a sectional view of II-II in Fig. 1 . In addition, in Fig. 2 , illustration of hatching showing cross-sections is omitted.

As shown in FIGS. 1 and 2, the liquid crystal display panel P includes: a first substrate P1; a second substrate P2 disposed opposite to the first substrate P1; and a substrate P2 disposed between the first substrate P1 and the second substrate P2. Between the liquid crystal layer P3.

The first substrate P1 is composed of a transparent substrate having a rectangular shape in plan view. The second substrate P2 is composed of a rectangular transparent substrate smaller than the first substrate P1. The liquid crystal layer P3 is sealed between the first substrate P1 and the second substrate P2 with a sealing material (not shown), and is disposed inside a region surrounded by the sealing material. The top view shape of this area is a rectangle. In the liquid crystal display panel P, a region accommodated inside the outer periphery of the liquid crystal layer P3 in a plan view is defined as a display region P4, and a region outside the periphery surrounding the display region P4 is defined as a frame portion G.

The polarizing film F11 is bonded to the back surface (backlight side) of the liquid crystal display panel P. The polarizing film F12 is bonded to the surface (display surface side) of the liquid crystal display panel P. On the back surface (backlight side) of the liquid crystal display panel P, the brightness enhancement film F13 is laminated|stacked on the polarizing film F11.

When an optical film such as a polarizing film or a brightness enhancement film applied to an optical display device of this configuration has a defect, problems such as an inability to operate the optical display device may occur.

Therefore, in order to prevent the occurrence of this problem, in the film manufacturing system of this embodiment, the defects of the film are inspected, and the defects belonging to the inspection are recorded. The defect information of the inspection result. Thereby, the defective part can be discarded from a product (film). Furthermore, since the distance between the defect of the film and the mark (mark) is small, the loss of the film discarded together with the defect can be reduced. In addition, the defective part means directly above and near the defect.

[Membrane Manufacturing System]

Next, a film manufacturing system using the manufacturing method of this embodiment will be described. Fig. 3 is a perspective view showing the configuration of the film production system according to the first embodiment.

The film production system 200 shown in FIG. 3 is for producing a long film 101 . The film 101 is the above-mentioned optical film.

In addition, in the following description, an xyz orthogonal coordinate system is set as needed, and the positional relationship of each member is demonstrated referring this xyz orthogonal coordinate system. In this embodiment, the long-side direction of the film 101 is defined as the x direction, and the direction perpendicular to the x-direction (short-side direction of the film 101) within the plane of the film 101 is defined as the y-direction. The direction perpendicular to the y direction is defined as the z direction.

Here, the x direction and the y direction are located in the horizontal plane, and the z direction is located in the vertical direction (vertical direction).

In addition, the +x direction may be called downstream.

The film manufacturing system 200 is equipped with the defect recording system 1 and the conveyance apparatus 201.

The transport device 201 transports the film 101 in the longitudinal direction (x direction). The conveyance path R formed by the conveyance device 201 is provided with conveyance rollers 203 . In addition, a plurality of conveyance rollers 203 may be provided.

The film 101 is made of resin films such as polyvinyl alcohol (PVA, Polyvinyl Alcohol) after dyeing, cross-linking, and stretching, and then laminating triacetate cellulose (TAC, Triacetyl cellulose) and other protective films.

[Defect recording system]

The defect recording system 1 inspects the film 101 conveyed in the longitudinal direction (x direction) for defects of the film 101 and records information (hereinafter also referred to as "defect information") belonging to the inspection result.

As shown in FIG. 3 , the defect recording system 1 includes a defect inspection device 11 , an inkjet device 13 , a moving device 14 , a length measuring device 15 , and a control device 16 .

In this specification, the defect inspection device 11 corresponds to the inspection unit in the scope of the patent application. And, the control device 16 is equivalent to the control part in the scope of the patent application. Furthermore, the configuration including the inkjet device 13 and the moving device 14 is referred to as a printing unit 12 .

[Defect inspection device]

The defect inspection device 11 is installed on the conveyance path R of the film 101 to inspect defects of the film 101 . The types of defects include foreign matter, irregularities, bright spot defects, etc., which are generated during production or conveyance of the film 101 . In addition, bright spot defect means what can be judged by the inspection by the illumination part mentioned later. For example, in a polarizing film, a bright spot defect refers to a defect generated by scattering of polarized light or the like.

In this embodiment, the defect inspection device 11 is used to perform, for example, reflection inspection, penetration inspection, tilt inspection, etc. on the conveyed film 101 . Inspection processes such as oblique penetration inspection and crossed polarizer inspection are used to detect defects in the film 101 . The defect inspection device 11 is capable of executing the above-mentioned inspection process.

The defect inspection device 11 includes an illumination unit 21 a , an illumination unit 22 a , and an illumination unit 23 a , a light detection unit 21 b , a light detection unit 22 b , and a light detection unit 23 b , and a determination unit 24 . The illuminating part 21a to the illuminating part 23a are lined up in the conveyance direction (longitudinal direction, x direction) of the film 101, and are arrange|positioned. And the light detection part 21b - the light detection part 23b are arrange|positioned in a row in the conveyance direction of the film 101. As shown in FIG.

The illumination part 21a - the illumination part 23a irradiate the film 101 with illumination light. The light detecting part 21b to the light detecting part 23b detect the light (transmitted light) which penetrates the film 101 .

The illuminating part 21a to the illuminating part 23a, and the photodetecting part 21b to the photodetecting part 23b are arranged to face each other with the film 101 interposed therebetween. In this case, the illuminating part 21a corresponds to the light detecting part 21b, the illuminating part 22a corresponds to the light detecting part 22b, and the illuminating part 23a corresponds to the light detecting part 23b.

In addition, the defect inspection device 11 is not limited to the configuration for detecting the transmitted light, and may have a configuration for detecting reflected light, or a configuration for detecting transmitted light and reflected light. When detecting reflected light, the photodetection unit is arranged on the same side as the illumination unit.

The illuminating part 21a to the illuminating part 23a irradiate the film 101 with the illuminating light whose light intensity, wavelength, or polarization state has been adjusted according to the type of defect inspection. The photodetector 21b to the photodetector 23b use imaging elements such as a CCD to take images of the position of the film 101 that is irradiated with illumination light. picture.

The images captured by the photodetection part 21 b to the photodetection part 23 b are output to the determination part 24 . The judging part 24 analyzes the images captured by the photodetecting part 21b to the photodetecting part 23b to judge the existence (position) or type of a defect. The result (inspection result) determined by the determination unit 24 is output to the control device 16 described later. In addition, the determination unit 24 can also be a part of the control device 16 .

[Printing Department]

The printing unit 12 is installed downstream of the defect inspection device 11 in the conveyance path R, and prints and records defect information on the film 101 .

(inkjet device)

FIG. 4 is a plan view showing the structure of the inkjet device 13 . FIG. 5 is a plan view showing the structure of the ink jet head included in the ink jet device 13 . The inkjet device 13 shown in FIG. 4 is extended in a direction intersecting the longitudinal direction of the film 101, and ejects ink to the film 101 to print defect information. In FIG. 4 , the direction intersecting the longitudinal direction of the film 101 refers to the y direction.

In addition, in FIG. 4 , although the angle formed by the extending direction of the inkjet device 13 and the longitudinal direction of the film 101 is 90°, it is not limited thereto.

The inkjet device 13 records defect information on the film 101 under the control of the control device 16 described later. The inkjet device 13 shown in FIG. 4 has ten inkjet heads 31 arranged in a direction intersecting the longitudinal direction of the film 101 .

The inkjet device 13 has a plurality of ejection holes 32 (refer to Figure 5). The plurality of injection holes 32 are discretely arranged from one end 101 a to the other end 101 b of the film 101 in a direction in which the longitudinal directions of the film 101 intersect. In addition, the term "discretely" in this embodiment refers to a case where the injection holes 32 are regularly arranged in a row, and also includes a case where they are arranged irregularly.

Here, an arrangement example of a plurality of injection holes 32 will be described with reference to FIG. 5 . The inkjet head 31 shown in FIG. 5 has 16 ejection holes 32 for ejecting ink. Furthermore, the distance between two adjacent injection holes 32 is 10 mm, and the distance from the edge 31 a of the inkjet head 31 to the injection hole 32 arranged on the outermost side is 5 mm.

In addition, in one inkjet head 31, the 16 injection holes 32 are arranged at equal intervals, and may be arranged at different intervals. Furthermore, the number, size, interval, etc. of the ejection holes 32 of the plurality of inkjet heads 31 may be the same as or different from each other.

(mobile device)

As shown in FIGS. 3 and 4 , the moving device 14 moves the inkjet device 13 in a direction intersecting the longitudinal direction of the film 101 under the control of a control device 16 described later. The control device 16 described later drives the moving device 14 and moves the plurality of inkjet heads 31 in a direction intersecting the longitudinal direction of the film 101 .

[length measuring device]

The length measuring device 15 is arranged on the conveyance roller 203 to measure the conveyance amount of the film 101 . The length measuring device 15 is constituted by a rotary encoder.

The rotary encoder constituting the length measuring device 15 measures the transport amount of the film 101 . The transport amount of the film 101 is based on the contact with the film 101 and the rotation The amount of rotational displacement of the transport roller 203 is determined. The measurement result of the length measuring device 15 is output to the control device 16 described later.

[control device]

The control device 16 controls the operation of the printing unit 12 according to the inspection results performed by the defect inspection device 11 . Specifically, the control device 16 controls the position movement of the inkjet device 13 by the moving device 14s and the printing by the inkjet device 13 according to the inspection result by the defect inspection device 11 .

The control device 16 drives the moving device 14 and moves the inkjet device 13 to a position where the y-coordinate of the inkjet device 13 overlaps with the y-coordinate of the defect.

In the defect recording system 1, in order not to cause a deviation between the position where the defect inspection is performed by the defect inspection device 11 of the film 101 (defect inspection position) and the position where defect information is recorded (information recording position), the After defect inspection, defect information is recorded in predetermined timing. For example, in this embodiment, after the time of inspection by the defect inspection device 11, the conveyance amount of the film conveyed on the conveyance path R is calculated, and when the calculated conveyance amount coincides with the offset distance, by spraying The ink unit 13 is used for recording.

Therefore, the offset distance refers to the transport distance of the film between the defect inspection device 11 and the inkjet device 13 . Strictly speaking, the offset distance is defined as the transport distance of the film between the defect inspection position of the defect inspection device 11 and the information recording position of the inkjet device 13 .

The offset distance is stored in the control device 16 in advance. specific In other words, in the defect inspection device 11 , there will be a photodetection part 21b to a photodetection part 23b, so that defect inspection is performed in each of the photodetection part 21b to the photodetection part 23b. Therefore, in the control device 16, an offset distance is memorized between each photodetection part 21b and photodetection part 23b.

In this embodiment, based on the measurement result of the length measuring device 15, after the time of inspection by the defect inspection device 11, the conveyance amount of the film conveyed on the conveyance path R is calculated. When the calculated conveyance amount and the offset When the distances match, printing is performed by the inkjet device 13 .

(Example of placement of symbols)

For example, in the conventional system in which the y-coordinate of the inkjet device cannot be changed for the defective part, it may be difficult to print a mark directly on the defective part. On the other hand, in order to print a mark directly on the defect without changing the y-coordinate of the inkjet device, a method of densely arranging a plurality of injection holes in the inkjet device may be considered. However, when a large number of injection holes are arranged, it can be presumed that there will be more opportunities for problems such as clogging of ink to occur.

As a result, it is presumed that the time or cost for maintenance will be further increased.

On the other hand, in this embodiment, as shown in FIG. 4 , by moving the inkjet device 13 , the mark M can be printed directly on the defect D of the film 101 . In Fig. 4, although dot-shaped marks are shown, linear marks may also be used.

Furthermore, when there are defect D1 and defect D2 with the same x coordinate, the mark M1 can be printed directly on the defect D1. On the other hand, the mark M2 can be printed so that it may surround the defect D2. In addition, the arrangement of the marks M is not limited to this.

Fig. 6 is a schematic diagram showing an example of arrangement of marks M in the first embodiment. In this embodiment, as shown in FIG. 6 (a), the defect D may be located on the surface of the film 101 between the adjacent first printed pattern PT1 and the first printed pattern PT1 in a direction intersecting with the longitudinal direction of the film 101. Between the 2 printed patterns PT2, the 1st printed pattern PT1 and the 2nd printed pattern PT2 are printed.

At this time, in the first printing pattern PT1 and the second printing pattern PT2 , a plurality of dot-shaped marks M are arranged and printed in the conveyance direction (longitudinal direction, x direction) of the film 101 .

The distance between the first printed pattern PT1 and the second printed pattern PT2 is determined according to the distance between the two injection holes 32 (see FIG. 5 ) to be used. When using the inkjet head 31 shown in FIG. 5 to use two adjacent injection holes 32, the distance between the first printed pattern PT1 and the second printed pattern PT2 is 10 mm.

And, as shown in FIG. 6(b), when the defect D is large, the adjacent first printed pattern PT1, second printed pattern PT2, third printed pattern PT3, and fourth printed pattern PT4 may be printed. With the inkjet head 31 shown in FIG. 5, when four adjacent injection holes 32 are used, the distance between the first printed pattern PT1 and the fourth printed pattern PT4 is 30 mm.

Here, the second printed pattern PT2 to the fourth printed pattern PT4 are referred to as "Xth printed pattern PTX". As described above, since the defect D is located between the first printed pattern PT1 and the X-th printed pattern PTX, the position of the defect D can be displayed. Thereby, the position of the defect D can be grasped easily in the inspection after printing.

Moreover, by the first printing pattern PT1 and the X printing The interval between the patterns PTX can identify the size of the defect D therebetween. In addition, it is not necessary to use adjacent injection holes 32 among the plurality of injection holes 32 arranged in a direction (y direction in FIG. 4 ) intersecting the conveyance direction (longitudinal direction) of the film 101 . The injection hole 32 can also be appropriately selected according to the position and size of the defect D.

The number or intervals of dot-shaped marks M constituting the first printed pattern PT1 and the Xth printed pattern PTX are not particularly limited, but the number or intervals of the marks M may be changed. In addition, in addition to dot-like or line-like marks, marks, patterns, etc. may be combined in printed marks. In this embodiment, defect information is associated with at least one selected from the group consisting of types, numbers, and intervals of marks in advance, and defect information is recorded in detail based on the correspondence.

(Membrane manufacturing method)

Next, a method for producing a film using the film production system 200 shown in FIG. 3 will be described. The film 101 is conveyed in the longitudinal direction (+x direction) of the film 101 by the conveyance device 201 .

First, the defect inspection device 11 inspects the defect of the film 101 . The length measuring device 15 calculates the transport amount of the film 101 after the time of inspection by the defect inspection device 11 .

Next, the control device 16 controls the inkjet device 13 and the moving device 14 according to the inspection result by the defect inspection device 11 and the measurement result of the length measuring device 15 . Specifically, the inkjet head 31 of the inkjet device 13 is moved toward a position corresponding to the defective part by the moving device 14 .

Furthermore, select a plurality of jets that the inkjet head 31 has. In the outlet hole 32, the first printing pattern PT1 and the Xth printing pattern PTX are printed on the injection hole 32. Then, ink is ejected from the selected ejection holes 32 to record defect information on the film 101 . In this way, a film in which defective information is recorded is manufactured.

In addition, in this embodiment, although the inkjet device 13 has the some inkjet head 31, it is not limited to this. The inkjet device of this embodiment may be formed of one inkjet head and extended in a direction intersecting the longitudinal direction of the film 101 .

According to the defect recording system constituted as above, the gap between the film defect and the mark (mark) can be reduced, and the occurrence of recording omission of the film defect information can be suppressed.

Furthermore, the film manufacturing system provided with this defect recording system can reduce the gap between the film defect and the mark, and can suppress the occurrence of recording omission of the film defect information.

Furthermore, the film manufacturing method using the film manufacturing system can reduce the gap between the film defect and the mark, and can suppress the occurrence of recording omission of the film defect information.

<Second Embodiment>

Hereinafter, a method for producing a film according to a second embodiment of the present invention will be described with reference to FIG. 7 . The manufacturing method of the film of this embodiment is partly the same as the manufacturing method of the film of 1st Embodiment. The difference lies in the composition of the inkjet device. Therefore, the same reference numerals are assigned to the same components in the present embodiment as those in the first embodiment, and detailed description thereof will be omitted.

(inkjet device)

Fig. 7 is a plan view showing the structure of the inkjet device according to the second embodiment. In addition, FIG. 7 corresponds to FIG. 4 . In the inkjet device 53 shown in FIG. 7 , a plurality of inkjet heads 31 are arranged in a first row L1 and a second row L2 set along a direction intersecting the longitudinal direction of the film 101 .

The inkjet head 31A and the inkjet head 31B are arranged adjacent to each other in a direction intersecting the longitudinal direction of the film 101 . The five inkjet heads 31B are arranged in the first row L1, and the five inkjet heads 31A are arranged in the second row L2.

That is, the inkjet heads 31A and the inkjet heads 31B are arranged in different rows, respectively. Thereby, the inkjet head 31A and the inkjet head 31B can move independently, respectively.

In addition, the number of rows in which a plurality of inkjet heads 31 are arranged may be limited to two, or may be three, for example.

By using the defect recording system provided with this inkjet device 53, there are the following advantages. For example, when there are defect D1 and defect D2 which have the same x coordinate, in 1st Embodiment, the case where the mark M1 is printed directly on only the defect D1 is demonstrated first.

On the other hand, in the second embodiment, the inkjet head 31A and the inkjet head 31C can move independently. Here, the inkjet head 31C means the inkjet head which can print the mark M2 to the defect D2 among the five inkjet heads 31B. Fig. 8 is a schematic diagram showing the operation of a plurality of inkjet heads in the second embodiment. As shown in FIG. 8, by moving the inkjet head 31A in the +y direction, the y coordinate of the injection hole 32A of the inkjet head 31A can be made to coincide with the y coordinate of the defect D1. Similarly, by moving the inkjet head 31C in the -y direction, the inkjet The y-coordinate of the ejection hole 32C of the ink head 31C coincides with the y-coordinate of the defect D2.

Therefore, the mark M1 and the mark M2 can be printed directly on both of the defect D1 and the defect D2. Therefore, the distance between the defect D and the mark M can be reduced, and the wear of the film that occurs when the defect portion is discarded can be reduced.

Furthermore, even when there are many defects D with different y-coordinates, occurrence of recording omission of defect information on the film 101 can be suppressed.

From the above, in the second embodiment, it is possible to reduce the gap between the film defect and the mark (mark), and to suppress the occurrence of recording omission of the film defect information.

<Third Embodiment>

Hereinafter, referring to FIG. 9, a method of manufacturing a film according to a third embodiment of the present invention will be described. The manufacturing method of the film of this embodiment is partly the same as the manufacturing method of the film of 2nd Embodiment. The difference lies in the composition of the inkjet device. Therefore, in the present embodiment, the same reference numerals are assigned to the same constituent elements as those of the second embodiment, and detailed description thereof will be omitted.

(inkjet device)

Fig. 9 is a plan view showing the structure of the inkjet device according to the third embodiment. In addition, FIG. 9 corresponds to FIG. 4 . The inkjet device 55 shown in FIG. 9 has a first inkjet device 53A and a second inkjet device 53B. The second inkjet device 53B is arranged downstream (+x direction) of the first inkjet device 53A in the conveyance path.

The first inkjet device 53A and the second inkjet device 53B are It has the same structure as the ink jet device 53 of the second embodiment.

The color of the ink ejected from the first inkjet device 53A may be different from the color of the ink ejected from the second inkjet device 53B. In this way, in addition to distinguishing dot-shaped or linear marks, symbols, and patterns, colors can also be distinguished. At this time, the type, color, quantity, and interval of the mark are associated with the defect information in advance, and the defect information is recorded in detail according to the corresponding relationship.

In addition, at least one of the first inkjet device 53A and the second inkjet device 53B may have the same configuration as the inkjet device 13 of the first embodiment.

Furthermore, at least one of the first inkjet device 53A and the second inkjet device 53B may be constituted by a single inkjet head and extended in a direction intersecting with the longitudinal direction of the film 101. . The first inkjet device 53A is preferably the inkjet device 53 of the second embodiment.

By using the defect recording system provided with this inkjet device 55, the following advantages are obtained. For example, it is assumed that the inkjet head 31A is located in the printable range AR and has a defect D3 and a defect D4 having the same x-coordinates. At this time, in 1st Embodiment, it demonstrates that the mark M3 can be printed only on the defect D3 directly above it.

On the other hand, in the third embodiment, the second inkjet device 53B has the inkjet head 31D capable of printing in the range AR. In the third embodiment, the inkjet head 31A and the inkjet head 31D are movable independently. As a result, the mark M3 and the mark M4 can be printed directly on both of the defect D3 and the defect D4. Therefore, the difference between defect D and mark M can be The interval is reduced, and it is possible to reduce the wear and tear of the film which occurs when the defective part is discarded.

Furthermore, similarly to the second embodiment, in the third embodiment, even when there are a plurality of defects D having different y coordinates, occurrence of recording omission of defect information on the film 101 can be suppressed.

Moreover, defect information can also be recorded with respect to the other defect D5 with the 1st printing pattern PT1 and the 2nd printing pattern PT2. In the third embodiment, the inkjet head 31C can print the first printing pattern PT1, and the inkjet head 31E can print the second printing pattern PT2. The inkjet head 31E is included in the second inkjet device 53B, and is located in a row different from the inkjet head 31D. Specifically, the inkjet head 31E is located in the row upstream of the row where the inkjet head 31D is located. In the third embodiment, the distance between the first printed pattern PT1 and the second printed pattern PT2 can be changed by changing the positional relationship between the inkjet head 31C and the inkjet head 31E.

Furthermore, the second inkjet device 53B may overlap the mark printed by the first inkjet device 53A to print a mark. At this time, even when the symbol cannot be printed by the first inkjet device 53A, the symbol can be printed by the second inkjet device 53B. Therefore, it is possible to suppress the omission of recording of defect information due to poor printing.

From the above, even in the third embodiment, the gap between the film defect and the mark (mark) can be reduced, and the occurrence of recording omission of the film defect information can be suppressed.

[Fourth Embodiment]

Hereinafter, referring to Fig. 10, while referring to the fourth embodiment of the present invention The method for producing the morphological film will be described. The method of manufacturing the film of the present embodiment is partly the same as the method of manufacturing the film of the third embodiment. The difference lies in the composition of the defect recording system. Therefore, the same reference numerals are assigned to the same components in this embodiment as those in the third embodiment, and detailed descriptions will be omitted.

[Defect recording system]

Fig. 10 is a perspective view showing the configuration of a film manufacturing system according to a fourth embodiment. In addition, FIG. 10 corresponds to FIG. 3 . As shown in FIG. 10 , the defect recording system 2 includes a defect inspection device 11 , an inkjet device 55 , a moving device 14 , a length measuring device 15 , a control device 16 and a sensor 41 . In addition, the configuration including the inkjet device 55 and the moving device 14 is referred to as the printing unit 12 .

[sensor]

As shown in FIG. 10 , the sensor 41 is disposed between the first inkjet device 53A and the second inkjet device 53B in the conveyance path R. As shown in FIG. The sensor 41 detects a printing defect caused by the first inkjet device 53A. The sensor 41 is constituted by, for example, a video camera. The image (detection result) captured by the sensor 41 is output to the control device 16 .

The control device 16 drives the second inkjet device 53B based on the inspection result of the defect inspection device 11 and the detection result of the sensor 41 to print defect information at a position corresponding to a printing defect.

In addition, in the present embodiment, the second inkjet device 53B may be driven from the head or may be stopped.

From the above, even in the fourth embodiment, it is possible to reduce the distance between the defect of the film and the mark (mark), and to suppress the defect of the film. Occurrence of omissions in the recording of trap information. In particular, printing defects can be detected in real time, and the occurrence of omission of recording defect information due to printing defects can be suppressed.

As mentioned above, although the example of preferred embodiment of this invention was demonstrated referring drawings, it goes without saying that this invention is not limited to this example. The shapes and combinations of the components shown in the above examples are examples, and various changes can be made according to design requirements without departing from the gist of the present invention.

P‧‧‧display panel

P1‧‧‧1st substrate

P2‧‧‧Second substrate

P3‧‧‧LCD layer

P4‧‧‧display area

Claims (11)

A defect recording system that records information on defects of the film that is conveyed in the longitudinal direction, and includes: an inspection unit that is installed on the conveyance path of the film and that inspects the film defects; the printing unit is installed downstream of the inspection unit in the transport route, and records the information by printing the information on the film; and the control unit controls the printing unit based on the inspection results obtained by the inspection unit. The above-mentioned printing part has: an inkjet device, which is arranged to extend in a direction intersecting with the aforementioned long-side direction, and ejects ink to the aforementioned film to print the aforementioned information; and a moving device, which makes the aforementioned inkjet device along the Moving in the direction of the aforementioned intersection; the aforementioned inkjet device has a plurality of ejection holes for ejecting the aforementioned printing ink, and the plurality of aforementioned ejection holes are discretely arranged from one end to the other end of the aforementioned film in the direction of the aforementioned intersection, and the aforementioned control unit is Based on the aforementioned inspection results, the positional movement of the aforementioned inkjet device performed by the aforementioned moving device and the printing performed by the aforementioned inkjet device are controlled. The defect recording system as described in item 1 of the scope of the patent application, wherein the aforementioned inkjet device has a plurality of inkjet heads arranged along the aforementioned intersecting direction, The inkjet heads each have the ejection holes, the moving device moves the plurality of inkjet heads along the intersecting direction, and the control unit independently controls the movement of the plurality of inkjet heads. The defect recording system as described in item 2 of the scope of the patent application, wherein a plurality of the inkjet heads are arranged in a plurality of rows set along the direction of the intersection, and the two aforementioned inkjet heads are adjacent to each other in the direction of the intersection The inkjet heads are respectively arranged in different aforementioned rows. The defect recording system according to claim 1, wherein the inkjet device includes: a first inkjet device; and a second inkjet device arranged downstream of the first inkjet device in the transport path device. The defect recording system as described in item 4 of the scope of the patent application, wherein at least one of the first inkjet device and the second inkjet device has a plurality of inkjet heads arranged along the crossing direction, the said jet The ink heads respectively have the aforementioned ejection holes, the moving device moves the plurality of the ink jet heads along the crossing direction, and the control unit independently controls the movement of the plurality of the ink jet heads. The defect recording system as described in item 5 of the scope of the patent application, wherein, the complex The plurality of inkjet heads are arranged in a plurality of rows along the direction of intersection, and the two inkjet heads adjacent to each other in the direction of intersection are arranged in different rows. The defect recording system as described in claim 5 or claim 6, wherein the first inkjet device has a plurality of inkjet heads arranged along the crossing direction. The defect recording system described in any one of Claims 4 to 6 of the scope of the patent application further includes: sensors arranged in the first inkjet device and the second inkjet device in the conveyance path In between, and detection of printing defects caused by the aforementioned first inkjet device, the aforementioned control unit drives the aforementioned second inkjet unit based on the inspection result obtained by the aforementioned inspection unit and the detection result of the aforementioned sensor, To print the aforementioned information at the position corresponding to the aforementioned bad printing. The defect recording system described in any one of the 4th to 6th claims of the patent application, wherein the color of the ink ejected by the first inkjet device is the same as that of the ink ejected by the second inkjet device different. A film manufacturing system comprising: a conveying device for conveying a long film toward the long side; and the defect recording system described in any one of claims 1 to 9 of the patent application. A method of manufacturing a membrane, using the membrane manufacturing system described in item 10 of the scope of the patent application.

Images