KR102522383B1 - Method for producing optical display panel and system for producing optical display panel - Google Patents

Abstract

Optical display panel manufacturing method enabling continuous production of high-quality optical display panels by enabling image capture with a small area sensor camera at four corners on both sides of the panel, saving space in the inspection area, and enabling high-precision inspection provides
The manufacturing method of an optical display panel includes a first bonding step of bonding a first optical film piece to the first surface of an optical cell while conveying the optical cell, and a first bonding step bonded to the first surface of the optical cell while conveying the optical cell. The 1st imaging process of imaging the bonding position of 1 piece of optical film with the 1st and 2nd area sensor cameras, and the conveyance direction (y) and the direction orthogonal to the conveyance direction from the image obtained by imaging with the 1st and 2nd area sensor cameras A first image inspection step of image processing and calculation of the distance between the end of the optical cell and the end of the first optical film piece in (x), and a first judgment step of determining a bonding misalignment based on the calculated distance. .

Description

Optical display panel manufacturing method and optical display panel manufacturing system

The present invention relates to a manufacturing method of an optical display panel and a manufacturing system of an optical display panel, to a method for inspecting a bonding defect (bonding misalignment) of an optical film piece bonded to a main surface of an optical display panel.

As a conventional inspection method for bonding failure, there is a method of inspecting bonding misalignment by taking images of four corners of the panel with a camera while an optical display panel in which pieces of optical film are bonded to both main surfaces, respectively, is stopped, for example. In this case, in a pair of diagonals on the first surface of the panel, the camera and the light are respectively disposed at two corner portions, and in the pair of diagonals on the other side, the camera and the light are placed in the two corner portions. place each In order to capture images of each of the four corner portions at once in a stationary state, an inspection area for two panels was required at the time of inspection.

Patent Literature 1 describes a method of imaging all four corners of a polarizing plate (rectangular) bonded to a liquid crystal panel. In paragraph 0040, it is described that it is necessary to stop the polarizer (and liquid crystal panel) when using the area sensor camera.

Patent Document 2 describes a method of inspecting the attachment accuracy of a polarizing plate by taking an image with a CCD camera from the side surface of a liquid crystal panel to which a polarizing plate (rectangular) is attached. It is described that four corner portions can be inspected with two CCD cameras by horizontally rotating the liquid crystal panel by 90°. In the inspection, the liquid crystal panel is transferred from the suction table to the liquid crystal cell inspection table, fixed to the table, and an image is taken by a CCD camera.

Patent Literature 3 describes a method of capturing an image of a liquid crystal display panel by an area inspection unit in a stopped state after transporting it to an inspection position.

Japanese Unexamined Patent Publication No. 2011-197281 Japanese Unexamined Patent Publication No. 2004-233184 Japanese Unexamined Patent Publication No. 2012-27003

However, in the conventional inspection methods and inspections such as Patent Literatures 1 and 3, since the liquid crystal display panel is stopped and images are taken with an area sensor camera, there is a problem that the production speed is lowered. In addition, four cameras were required to capture images of the four corners of the panel.

Patent Literatures 1 and 3 describe a method of capturing an image of a liquid crystal display panel while conveying it with a line sensor camera. However, with this method, although the bonding position (joint shift) in the transport direction can be detected, it is difficult to detect the joint displacement in the width direction of the direction orthogonal to the transport direction with high accuracy.

An object of the present invention has been made in view of the above situation, and it is possible to capture images with an area sensor camera with a small number of four corner portions on both sides of the panel, and also to save space in the inspection area, to enable high-precision inspection, and to provide high-quality optics. An optical display panel manufacturing method and an optical display panel manufacturing system capable of continuously producing display panels are provided.

In order to solve the above problems, as a result of repeated research, the following invention has been completed.

A method for manufacturing an optical display panel of the present invention is a roll of a first optical film laminate having a first optical film having an adhesive and a strip-shaped first carrier film on which the first optical film is laminated via the adhesive. The first optical film piece obtained by unwinding the strip-shaped first optical film layered product from the above, and cutting at least the first optical film of the strip-shaped first optical film layered product in the width direction while conveying the optical cell. A first bonding step of bonding to the first surface of the optical cell;

While transporting the optical cell, the bonding position of the first optical film piece bonded to the first surface of the optical cell is aligned with the end portion of the optical cell in the width direction while being orthogonal to the transport direction. First and second area sensors A first imaging step of capturing an image with a camera;

In the first imaging step, from the image obtained by imaging with the first and second area sensor cameras, the edge of the optical cell and the first optical film piece in the conveying direction (y) and in the direction (x) orthogonal to the conveying direction A first image inspection step of calculating distances (Dx1 to Dx4, Dy1 to Dy4) with the end portion by image processing;

and a first judgment step of judging a junction shift based on the distances Dx1 to Dx4 and Dy1 to Dy4 calculated in the first image inspection step.

According to this configuration, it is possible to capture images with a small area sensor camera at the four corners on both sides of the panel, and the inspection area can be space-saving (combined with the transfer area of the optical display panel), enabling high-precision inspection. Thus, high-quality optical display panels can be continuously produced.

As one embodiment of the above invention, a first storage step of storing a defective optical cell when judged to be defective in the first judgment step; A first good product conveying step of doing is included.

As an embodiment of the above invention, the first imaging step captures images of first and second corner portions in front of the transported optical cell (downstream side in the transport direction) with the first and second area sensor cameras, and Images are taken of the third and fourth corner portions at the back of the cell (upstream side in the transport direction) with the first and second area sensor cameras. That is, the first area sensor camera captures images of the first and third corner portions, and the second area sensor camera captures images of the second and fourth corner portions. The first corner part and the third corner part are disposed parallel to the conveying direction, and the second corner part and the fourth corner part are disposed parallel to the conveying direction. The 1st corner part and the 2nd corner part are arrange|positioned in the direction orthogonal to the conveyance direction.

As an embodiment of the above invention, from a roll of a second optical film layered body having a second optical film having an adhesive and a strip-shaped second carrier film on which the second optical film is laminated via the adhesive, A second optical film piece obtained by uncoiling the shaped second optical film layered product and cutting at least the second optical film of the belt-shaped second optical film layered product in the width direction while conveying the optical cell thereto A second bonding step of bonding to the second surface of the cell;

While transporting the optical cell, the bonding position of the second optical film piece bonded to the second surface of the optical cell is aligned with the width end of the optical cell in a direction orthogonal to the transport direction, and the third and fourth area sensor cameras A second imaging step for imaging with

In the second imaging step, from the image obtained by imaging with the third and fourth area sensor cameras, the edge of the optical cell and the second optical film piece in the conveying direction (y) and in the direction (x) orthogonal to the conveying direction A second image inspection step of calculating a distance (Dx5 to Dx8, Dy5 to Dy8) from the end by image processing;

It further includes a second judgment step of judging a junction misalignment based on the distances Dx5 to Dx8 and Dy5 to Dy8 calculated in the second image inspection step.

According to this configuration, the optical film can be bonded to both surfaces of the optical display panel, and after bonding to one side, it is possible to inspect the bonding position (joint misalignment inspection) with respect to that surface.

As one embodiment of the above invention, a second storage step of storing a defective optical cell when judged to be defective in the second determination step, and conveying the good optical cell to a later stage when determined to be a good product in the second determination step and a second good product conveying step.

As an embodiment of the above invention, the second imaging step is to capture images of the first and second corner portions in front of the optical cell to be transported with the third and fourth area sensor cameras, and capture images of the rear of the optical cell to be transported. Images of the third and fourth corner portions are captured by the third and fourth area sensor cameras. That is, the third area sensor camera captures images of the first and third corner portions, and the fourth area sensor camera captures images of the second and fourth corner portions.

As an embodiment of the above invention, the first imaging process, the first image inspection process, and the first judgment process are performed after the first bonding process and before the second bonding process.

According to this structure, before the 2nd bonding process, the optical cell with bonding misalignment (an optical cell in which the optical film piece was bonded only on one surface) can be excluded.

As an embodiment of the present invention, in the first bonding step, the first optical cell and the first optical film piece are fed to the optical cell by feeding the optical cell and the first optical film piece while being held by a pair of first and second rollers. It is a configuration for bonding the film pieces,

In the first imaging step, the first and second corner portions in front of the optical cell transported in a state in which the optical cell and the rear portion of the first optical film piece are sandwiched and supported by the first and second rollers are removed from the first and second corners. This is a configuration for capturing images with the second area sensor camera.

According to this configuration, the front first and second corner portions of the optical cell are moved by the first and second area sensor cameras in a state in which the rear portion (for example, the rear end portion) of the panel is held by the first and second rollers. Since imaging can be performed, the space of the inspection area can be further saved. Further, when a conveyance roller is used as a conveyance unit that conveys the optical cell, the optical cell may vibrate during conveyance. By holding the optical cell between the first and second rollers, the first and second corners can be imaged in a state where this vibration is suppressed.

As an embodiment of the above invention, in the second bonding step, the optical cell and the second optical film piece are sent out while being held by a pair of third and fourth rollers, and the second optical cell is attached to the second optical film piece. It is a configuration for bonding the film pieces,

In the second imaging step, the first and second corner portions in front of the optical cell transported in a state in which the optical cell and the rear portion of the second optical film piece are held by the third and fourth rollers are inserted into the third and second corners. This is a configuration for capturing images with the fourth area sensor camera.

According to this configuration, the front first and second corner portions of the optical cells are moved by the third and fourth area sensor cameras in a state in which the rear portion (for example, the rear end portion) of the panel is held by the third and fourth rollers. Since imaging can be performed, the space of the inspection area can be further saved. Further, when a conveyance roller is used as a conveyance unit that conveys the optical cell, the optical cell may vibrate during conveyance. By holding the optical cell with the third and fourth rollers, the first and second corner portions can be imaged in a state where this vibration is suppressed.

As an embodiment of the above invention, in the first image inspection step, when the cut end face of the first optical film piece (the end face cut in the width direction intersecting (perpendicular to) the belt-shaped longitudinal direction) is inclined. , the distance is calculated based on the line where the thickness of the film is maintained.

According to this structure, it is possible to always read a line having a stable thickness, thereby improving the accuracy of position inspection.

As an embodiment of the above invention, in the second image inspection step, when the cut end face of the second optical film piece (the end face cut in the width direction intersecting (perpendicular to) the belt-shaped longitudinal direction) is inclined. , the distance is calculated based on the line where the thickness of the film is maintained.

According to this structure, it is possible to always read a line having a stable thickness, thereby improving the accuracy of position inspection.

Another optical display panel manufacturing system of the present invention,

A strip-shaped first optical film layered body from a roll of a first optical film layered body having a first optical film having an adhesive and a strip-shaped first carrier film on which the first optical film is laminated via the adhesive. The first optical film piece obtained by unwinding and cutting at least the first optical film of the strip-shaped first optical film laminate in the width direction is bonded to the first surface of the optical cell while conveying the optical cell. 1 junction,

While conveying the optical cell, the bonding position of the first optical film piece bonded to the first surface of the optical cell is aligned with the end of the optical cell in the width direction while being orthogonal to the conveying direction, and imaging the end in the width direction first and second area sensor cameras that

Distance (Dx1) between the end of the optical cell and the end of the first optical film piece in the conveyance direction (y) and in the direction (x) orthogonal to the conveyance direction from the image obtained by imaging with the first and second area sensor cameras to Dx4, Dy1 to Dy4), a first image inspecting unit that performs image processing and calculates;

and a first judgment unit that determines a junction misalignment based on the distances Dx1 to Dx4 and Dy1 to Dy4 calculated by the first image inspection unit.

As an embodiment of the present invention, a first storage unit for accommodating a defective optical cell when judged to be defective by the first determination unit; A first good product transport unit is provided.

As an embodiment of the above invention, a first detection unit is provided on the conveying upstream side of the optical cell from the first and second area sensor cameras,

After a predetermined period of time after the first detection unit detects the transported optical cell, the first and second area sensor cameras capture images of first and second corner portions in front of the transported optical cell;

After a predetermined period of time after the first detection unit stops detecting the optical cell, the first and second area sensor cameras capture images of third and fourth corners behind the transported optical cell.

As an embodiment of the above invention, from a roll of a second optical film layered body having a second optical film having an adhesive and a strip-shaped second carrier film on which the second optical film is laminated via the adhesive, A second optical film piece obtained by uncoiling the shaped second optical film layered product and cutting at least the second optical film of the belt-shaped second optical film layered product in the width direction while conveying the optical cell thereto A second joint portion bonded to the second surface of the cell;

While conveying the optical cell, the bonding position of the second optical film piece bonded to the second surface of the optical cell is aligned with the width end of the optical cell in a direction orthogonal to the conveying direction, and imaging the width end 3, a fourth area sensor camera;

Distances between the end of the optical cell and the end of the polarizing film (Dx5 to Dx8, Dy5 to Dy8 ) A second image inspection unit that calculates by image processing;

It further includes a second judgment unit that determines a junction misalignment based on the distances Dx5 to Dx8 and Dy5 to Dy8 calculated by the second image inspection unit.

As an embodiment of the present invention, a second storage unit accommodating defective optical cells when judged to be defective by the second determination unit; and a second good product conveying unit.

As an embodiment of the above invention, a second detection unit is provided on the conveying upstream side of the optical cell from the third and fourth area sensor cameras,

After a predetermined period of time after the second detection unit detects the transported optical cell, the third and fourth area sensor cameras capture images of first and second corner portions in front of the transported optical cell;

The third and fourth area sensor cameras capture images of the third and fourth corners at the rear end of the transported optical cell after a predetermined period of time after the second detection unit stops detecting the optical cell.

In an embodiment of the present invention, the imaging processing by the first and second area sensor cameras, the image processing by the first image inspecting unit, and the judgment processing by the first judging unit are performed after the bonding process by the first bonding unit. , and is performed before the bonding process by the second bonding part.

As an embodiment of the above invention, the first joint portion has a pair of first and second rollers, and the optical cell and the first optical film piece are fed while being held by the first and second rollers, bonding the first optical film piece to the optical cell;

The first and second area sensor cameras have first and second corner portions in front of an optical cell transported in a state in which the optical cell and the rear portion of the first optical film piece are held by the first and second rollers. take a picture

As an embodiment of the above invention, the second joining portion has a pair of third and fourth rollers, and the optical cell and the second optical film piece are fed while being held by the third and fourth rollers, bonding the second optical film piece to the optical cell;

The third and fourth area sensor cameras have first and second corner portions in front of an optical cell transported in a state in which the rear portions of the optical cell and the second optical film piece are held by the third and fourth rollers, take a picture

As an embodiment of the present invention, the first image inspecting unit may, when the cut end face of the first optical film piece (the end face cut in the width direction intersects (perpendicular to) the belt-shaped longitudinal direction) is inclined, the film The distance is calculated based on the line where the thickness of is maintained.

As an embodiment of the present invention, the second image inspecting unit, when the cut end face of the second optical film piece (the end face cut in the width direction intersecting (perpendicular to) the belt-shaped longitudinal direction) is inclined, the film The distance is calculated based on the line where the thickness of is maintained.

The optical display panel manufacturing system of the above invention has the same effect as the optical display panel manufacturing method.

1 is a schematic view showing an example of a manufacturing system for an optical display panel;
Fig. 2 is a diagram explaining an inspection method of an image inspection unit;
Fig. 3 is a diagram explaining an inspection method of an image inspection unit;
Fig. 4 is a diagram explaining an inspection method of an image inspection unit;
Fig. 5 is a diagram explaining an inspection method of an image inspection unit;
Fig. 6 is a diagram showing an example of an inspection image;
Fig. 7 is a diagram showing an example of a measurement method;
Fig. 8 is a diagram showing an example of a measurement method;
Fig. 9 is a diagram explaining an inspection method of an image inspection unit;
Fig. 10 is a diagram explaining another example of an imaging method;

(Embodiment 1)

1 is a schematic diagram of a manufacturing system for an optical display panel according to Embodiment 1. FIG. 2 to 5 are diagrams illustrating an inspection method by an inspection unit. 6 is an example of an inspection image. Hereinafter, the optical display panel manufacturing system according to the present embodiment will be described in detail with reference to FIGS. 1 to 6 .

In this embodiment, a liquid crystal cell as an optical cell and a liquid crystal display panel as an optical display panel will be described as an example. In addition, as a roll of an optical film laminated body, the thing as shown in FIG. 1 is used. That is, as the 1st optical film layered product roll 1, the strip-shaped 1st optical film which has an absorption axis in the longitudinal direction on the 1st carrier film 12 (the 1st optical film piece 11 after cutting (film main body) (11a) and pressure-sensitive adhesive (11b)) are laminated, and the first optical film layered body 10 in the shape of a strip is wound. Here, the 1st optical film layered product 10 has the width|variety corresponding to the short side of liquid crystal cell P (width substantially shorter than the short side of liquid crystal cell P). As the 2nd optical film layered product roll 2, the strip-shaped 2nd optical film which has an absorption axis in the longitudinal direction on the 2nd carrier film 22 (after cutting, the 2nd optical film piece 21 (film main body 21a) ) and the pressure-sensitive adhesive 21b) are laminated, and the band-shaped second optical film laminate 20 is wound. Here, the 2nd optical film layered product 20 has a width corresponding to the long side of the liquid crystal cell P (a width substantially shorter than the longer side of the liquid crystal cell P).

As shown in FIG. 1 , the liquid crystal display panel manufacturing system according to the present embodiment includes a first transport unit 71 that transports a liquid crystal cell P to a first bonding unit 34, and a first transport unit 71 of the liquid crystal cell P. The 2nd conveyance part 72 which conveys the liquid crystal cell P after bonding the 1st optical film piece 11 to 1 surface P1, the liquid crystal cell in the conveyance direction by inverting the upper and lower surfaces P1 and P2 ( A batch replacement unit 73 that exchanges the short and long sides of P) and a third transfer unit 74 that transports the liquid crystal cell P replaced by the batch replacement unit 73 to the second bonding unit 134 (corresponding to the 1st non-defective conveyance part) and the liquid crystal cell P after bonding the 2nd optical film piece 21 to the 2nd surface P2 of liquid crystal cell P (the optical film was bonded to both surfaces) It has a 4th conveyance part 75 (corresponding to the 2nd non-defective conveyance part) which conveys the liquid crystal cell in this state (referred to as "liquid crystal display panel"). Each conveyance unit is configured with a plurality of conveyance rollers R for conveying the liquid crystal cell P by rotating around a rotation axis parallel to the conveyance direction. Moreover, you may be comprised with a suction plate etc. other than a conveyance roller.

(Liquid crystal cell transfer process)

The liquid crystal cell P is disposed in the first transport unit 71 so that the first surface P1 becomes the ceiling surface from the storage unit 81 housing the liquid crystal cell P, and the rotation of the transport roller causes the first surface P1 to be transferred to the first conveyance unit 71. It is conveyed to the junction part 34.

(Unwinding step of first optical film layered product, optical film cutting step)

On the other hand, the 1st optical film layered product 10 unwound from the 1st optical film layered product roll 1 adsorbs and fixes the 1st carrier film 12 side by the cut part 31, the 1st carrier film 12 ) is left uncut, and the first optical film is cut into a predetermined size (length along the long side of the liquid crystal cell P (length substantially shorter than the long side)), and a plurality of optical films are formed on the first carrier film 12. The 1st optical film piece 11 is formed. As for the cutting part 31, cutting using a blade (cutting with a cutting blade) and cutting with a laser are mentioned, for example.

An example of the cut-out portion 10a after being cut is indicated by an arrow in FIG. 1, and the cut-out interval is deliberately shown to be large for ease of explanation. When the blade is double-edged, the cutting surface is inclined as shown in FIG. 8 as it progresses in the cutting depth direction. In the case of a single blade, the cut surface on the inclined blade surface is inclined as shown in FIG. The measuring method in the case of such an inclined cut surface will be described later.

A configuration in which a nip roller (not shown) is disposed upstream or downstream of the cutting portion 31 and conveys the first optical film layered body 10 may be used. Also, nip rollers may be disposed upstream and downstream of the cutting portion 31 .

(Tension control process)

In the cutting process of the first optical film layered body 10 and the bonding process at the later stage, a tension adjusting unit 32 for enabling continuous processing so that the processing is not interrupted over a long period of time and also for adjusting slack of the film. is installed. The tension adjusting unit 32 is configured with, for example, a dancer mechanism using weights. A structure in which a nip roller (not shown) is disposed upstream or downstream of the tension adjusting unit 32 and conveys the first optical film layered body 10 may be used. Also, nip rollers may be disposed upstream and downstream of the tension adjusting portion 32 .

(peeling process)

The 1st optical film layered product 10 is wound around the 1st peeling part 33 and reversed, and the 1st optical film piece 11 peels from the 1st carrier film 12. The first carrier film 12 is wound into a roll by a winding unit 35 . The winding unit 35 has a roll and a rotation drive unit, and the rotation drive unit winds the first carrier film 12 around the roll by rotating the roll. In addition, a structure in which a nip roller (not shown) is disposed upstream or downstream of the peeling unit 33 and conveys the first optical film layered product 10 or the first carrier film 12 may be used. Further, nip rollers may be arranged on the upstream and downstream sides of the peeling portion 33 .

(First joining process)

The 1st bonding part 34 attaches the 1st optical film piece 11 exfoliated from the 1st carrier film 12 to the 1st surface P1 of liquid crystal cell P, conveying liquid crystal cell P, to the adhesive ( Join through 11b). The first bonding portion 34 is composed of a pair of first rollers 34a and second rollers 34b. Either one may be a driving roller and the other may be a driven roller, and both rollers may be driving rollers. By feeding the first optical film piece 11 and the liquid crystal cell P downstream while sandwiching and holding the first optical film piece 11 and the liquid crystal cell P with a pair of first roller 34a and second roller 34b, the first optical film piece 11 is liquid crystal. It is bonded to the first surface P1 of the cell P.

(1st imaging process)

Liquid crystal cell P after bonding the 1st optical film piece 11 to the 1st surface P1 of liquid crystal cell P is conveyed downstream by the 2nd conveyance part 72. The bonding position of the 1st optical film piece 11 bonded to the 1st surface P1 of liquid crystal cell P, conveying liquid crystal cell P by the 2nd conveyance part 72 in the conveyance direction y Images are captured by the first area sensor camera 41 and the second area sensor camera 43 arranged in the direction (x) orthogonal to the liquid crystal cell P along the ends A1 to A4 in the width direction of the liquid crystal cell P. The front first corner portion A1 and the rear third corner portion A3 of the liquid crystal cell P are captured by the first area sensor camera 41 . On the other hand, the second corner portion A2 on the front side of the liquid crystal cell P and the fourth corner portion A4 on the rear side thereof are captured by the second area sensor camera 43 .

The 1st detection part 45 is arrange|positioned above the 2nd conveyance part 72, and the 1st area sensor camera 41 and the 2nd area sensor camera 43 are arrange|positioned on the downstream side. First, as shown in FIG. 2, the 1st detection part 45 detects the front part of liquid crystal cell P. As shown in Fig. 3, after a predetermined period has elapsed from this detection, the first area sensor camera 41 and the second area sensor camera 43 are driven to capture an image. Here, the "predetermined period from detection" is set by the distance between the first detection unit 45 and the first and second area sensor cameras 41 and 43, the size of the liquid crystal cell transport direction, and the transport speed of the liquid crystal cell. The first detection unit 45 can be configured with a reflective optical sensor or the like. After the control unit 50, which has received the detection signal (ON signal) from the first detection unit 45, has elapsed for a predetermined period from the timing of the detection signal, the first area sensor camera 41 and the second area sensor camera 43 A command signal for driving is sent to the first area sensor camera 41 and the second area sensor camera 43, and the first area sensor camera 41 and the second area sensor camera 43 are driven according to the command signal. Then, the first and second corner portions A1 and A2 are captured.

Subsequently, as shown in FIG. 4, when the liquid crystal cell P is conveyed forward and the first detection unit 45 stops detecting the liquid crystal cell P, a non-detection signal (OFF signal) is sent to the control unit ( 50) is sent to As shown in Fig. 5, a command for the controller 50 to drive the first area sensor camera 41 and the second area sensor camera 43 after a predetermined period elapses from the timing of this non-detection (OFF signal) A signal is sent to the first area sensor camera 41 and the second area sensor camera 43, and according to the command signal, the first area sensor camera 41 and the second area sensor camera 43 are driven, and the third area sensor camera 43 is driven. Images of the fourth corner portions A3 and A4 are captured. Here, the "predetermined period from the timing of the non-detection signal" depends on the distance between the first detection unit 45 and the first and second area sensor cameras 41 and 43, the size of the liquid crystal cell transport direction, and the liquid crystal cell transport speed. is set by

The first and second area sensor cameras 41 and 43 include, for example, a CCD area camera and a CMOS area camera. A ring-shaped ring lighting unit is provided at a position in front of the imaging unit of the first and second area sensor cameras 41 and 43, and the carrying roller ( The first and second reflection lighting units 42 and 44 are disposed between R). The irradiated light from the ring lighting unit is reflected by the first and second reflection lighting units 42 and 44, and the end of the liquid crystal cell P and the end of the first optical film piece 11 are irradiated from the back side to form an end line (edge). line) stand out. Thereby, the end line (edge line) is clearly imaged. The first and second reflective lighting units 42 and 44 may include a reflector and a reflective member.

6 shows an example of an image of the second corner portion A2 captured by the second area sensor camera 43. As shown in FIG. Reference numeral BM denotes a black matrix inside a liquid crystal cell.

Further, as another embodiment, a structure in which only the lighting unit for illuminating the liquid crystal cell from the camera side is used and the reflection lighting unit is omitted is also possible. As another embodiment, a transmission light source may be disposed under the transport roller R and between adjacent transport rollers R, and an image of the transmitted light is captured by an area camera disposed above the transmission light source.

(1st image inspection process)

The first image inspection unit 51 detects a liquid crystal cell P in the transport direction y and in the direction x orthogonal to the transport direction from images obtained by imaging with the first and second area sensor cameras 41 and 43. The distance (Dx1 to Dx4, Dy1 to Dy4) between the end of the first optical film piece 11 and the end of the first optical film piece 11 is image-processed and calculated.

Specifically, it demonstrates with reference to FIGS. 6 and 7. The first image inspecting unit 51 performs image processing on an image obtained by imaging with the second area sensor camera 43 . An image obtained by image processing is shown in FIG. 6 . At this time, the distance Dy2 between the end P0y of the liquid crystal cell P and the end L0y of the first optical film piece 11 in the transport direction y is calculated by analyzing and adding the number of pixels (pixels). . Similarly, the distance Dx2 between the end of the liquid crystal cell P and the end of the first optical film piece 11 in the direction x orthogonal to the transport direction is calculated by analyzing and adding the number of pixels (pixels). The x-direction measurement position in the case of obtaining Dy2 is the position of the distance Mx2 from the end of the liquid crystal cell P in the x-direction. On the other hand, the y-direction measurement position in the case of obtaining Dx2 is the position of the distance My2 from the end of the liquid crystal cell P in the y-direction. The distance (Mx2, My2) is preset. Other distances (Dx1, Dx3, Dx4, Dy1, Dy3, Dy4) can be similarly calculated. Each distance (Mx1, Mx3, Mx4, My1, My3, My4) in this case is also preset.

Moreover, as shown in FIG. 8, the 1st image inspection part 51, when the edge part of the 1st optical film piece 11 inclines inward, the edge part P0y of liquid crystal cell P and the 1st The distance with the edge part L1y of 1 optical film piece 11 is computed. That is, the distance is calculated on the basis of the edge line where the thickness of the first optical film piece 11 is maintained. In this way, it is possible to read a line having a stable thickness at all times, thereby improving the accuracy of position inspection. In FIG. 8, it is an example in which the edge of the bonding surface of the 1st optical film piece 11 protrudes, and the surface other than the bonding surface sinks into the inside of a film surface. For example, when both blades are used in the 1st cutting part 31, it becomes the cut surface of the 1st optical film piece 11 like FIG.

(First Judgment Process)

The 1st judgment part 52 determines the junction shift based on the distance (Dx1-Dx4, Dy1-Dy4) computed by the 1st image inspection part 51. The first determination unit 52 calculates the difference between the pre-saved (set) standard joint distance (set for each of the four corner portions) and the calculated Dx1 to Dx4 and Dy1 to Dy4, and the difference is a predetermined value (e.g. For example, if it is within ±100 to ±500 μm), it is judged as a good product, while if the difference does not fall within a predetermined value, it is judged as a defective product.

(First alignment correction process)

When the first determination unit 52 determines that the defect is defective, the control unit 50 issues an alignment correction command to the first bonding unit 34 . As a correction method, the method of finely adjusting the angle of the peeling part 33, and the method of rotating-adjusting liquid crystal cell P with respect to a conveyance direction are mentioned, for example.

(First acceptance process of defective products)

When the first judgment unit 52 determines that the product is defective, as shown in FIG. 1 , the defective liquid crystal cell P is diverted from the second transport unit 72 to the defective product storage unit 82, transported, and stored. . On the other hand, when a good product is determined by the first determination unit 52, the good product liquid crystal cell P is conveyed to a later stage (first good product conveyance step).

In addition, as for defective liquid crystal cell P, the 1st optical film piece 11 may peel from liquid crystal cell P, and may be conveyed to the accommodating part 81.

In addition, as another embodiment of the first image inspection unit 51 and the first judgment unit 52, the first image inspection unit 51 is located at the ends of the BM in the x and y directions and the end of the first optical film piece 11. You can also calculate the distance to . And the 1st determination part 52 can determine a joining shift|offset|difference based on the distance.

(Batch replacement process)

The batch changing unit 73 inverts the upper and lower surfaces P1 and P2 of the liquid crystal cell P of good quality transported by the second transport unit 72, and the short side of the liquid crystal cell P in the transport direction y Swap sides and long sides. As the arrangement changer 73, a known mechanism can be appropriately employed. In the present Embodiment 1, the disposition changing unit 73 has a rotation unit that adsorbs the liquid crystal cell P and horizontally rotates it by 90°, and an inversion unit that adsorbs the liquid crystal cell P and reverses the front and back sides.

(Liquid crystal cell transfer process)

After processing by the batch changing unit 73 , the liquid crystal cell P is transported to the second bonding unit 134 by the third transport unit 74 .

(Unwinding step of the second optical film layered product, optical film cutting step)

The 2nd optical film layered product 20 unwound from the 2nd optical film layered product roll 2 adsorbs and fixes the 2nd carrier film 22 side, and cuts the 2nd carrier film 22 by the cutting part 131. Without cutting, the second optical film is cut to a predetermined size (length along the short side of the liquid crystal cell P (length substantially shorter than the short side)), and a plurality of second optical film pieces are placed on the second carrier film. (21) form. As for the cutting part 131, cutting using a blade (cutting with a cutting blade) and cutting with a laser are mentioned, for example.

An example of the cut-out portion 20a after being cut is indicated by an arrow in FIG. 1, and the cut-out interval is deliberately shown to be large for ease of explanation.

A configuration in which a nip roller (not shown) is arranged upstream or downstream of the cutting portion 131 and conveys the second optical film layered body 20 may be used. Also, nip rollers may be disposed upstream and downstream of the cutting portion 131 .

(Tension control process)

In the cutting process of the second optical film layered body 20 and the subsequent bonding process, the tension adjusting unit 132 is used to enable continuous processing so that the processing is not interrupted over a long period of time and also to adjust the slack of the film. is installed. The tension adjusting unit 132 is configured with, for example, a dancer mechanism using weights. A structure in which a nip roller (not shown) is disposed upstream or downstream of the tension adjusting unit 132 and conveys the second optical film layered body 20 may be used. Also, nip rollers may be disposed upstream and downstream of the tension adjusting unit 132 .

(peeling process)

The 2nd optical film layered product 20 is wound around the 2nd peeling part 133 and reversed, and the 2nd optical film piece 21 peels from the 2nd carrier film 22. The second carrier film 22 is wound into a roll by a winding unit 135 . The winding unit 135 has a roll and a rotation driving unit, and the rotation driving unit winds the second carrier film 22 around the roll by rotating the roll. In addition, a configuration may be employed in which a nip roller (not shown) is disposed upstream or downstream of the peeling unit 133 to convey the second optical film laminate 20 or the second carrier film 22 . Further, nip rollers may be arranged on the upstream and downstream sides of the peeling portion 133 .

(Second joining process)

The 2nd bonding part 134 attaches the 2nd optical film piece 21 exfoliated from the 2nd carrier film 22 to the 2nd surface P2 of liquid crystal cell P, conveying liquid crystal cell P, as an adhesive Join through (21b). The second bonding portion 134 is composed of a pair of third rollers 134a and fourth rollers 134b. Either one may be a driving roller and the other may be a driven roller, and both rollers may be driving rollers. By feeding the second optical film piece 21 and the liquid crystal cell P downstream while sandwiching and holding the second optical film piece 21 with the pair of third rollers 134a and fourth roller 134b, the second optical film piece 21 is liquid crystal. It is bonded to the second surface P2 of the cell P.

(Second imaging process)

Liquid crystal cell P (liquid crystal display panel) after bonding the 2nd optical film piece 21 to the 2nd surface P2 of liquid crystal cell P is conveyed downstream by the 4th conveyance part 75. The bonding position of the 2nd optical film piece 21 bonded to the 2nd surface P2 of liquid crystal cell P to the conveyance direction y, conveying liquid crystal cell P by the 4th conveyance part 75 Images are captured by the third area sensor camera 141 and the fourth area sensor camera 143 arranged in the direction (x) orthogonal to the liquid crystal cell P along the ends B1 to B4 in the width direction of the liquid crystal cell P (see FIG. 9). ). The front first corner portion B1 and the rear third corner portion B3 of the liquid crystal cell P are captured by the third area sensor camera 141 . On the other hand, the front second corner portion B2 and the rear fourth corner portion B4 of the liquid crystal cell P are captured by the fourth area sensor camera 143 .

As shown in FIG. 9, the second detection unit 145 is disposed above the fourth conveyance unit 75, and the third area sensor camera 141 and the fourth area sensor camera 143 are disposed downstream of the fourth conveyance unit 75. are placed The 2nd detection part 145 detects the front part of liquid crystal cell P. After a lapse of a predetermined period from this detection, the third area sensor camera 141 and the fourth area sensor camera 143 are driven to capture an image. Here, the "predetermined period from detection" is set by the distance between the second detection unit 145 and the third and fourth area sensor cameras 141 and 143, the size of the liquid crystal cell transport direction, and the liquid crystal cell transport speed. The second detection unit 145 can be configured with a reflective optical sensor or the like. After the control unit 50, which has received the detection signal (ON signal) from the second detection unit 145, has elapsed for a predetermined period from the timing of the detection signal, the third area sensor camera 141 and the fourth area sensor camera 143 A command signal for driving is sent to the third area sensor camera 141 and the fourth area sensor camera 143, and the third area sensor camera 141 and the fourth area sensor camera 143 are driven according to the command signal. to capture images of the first and second corner portions B1 and B2.

Subsequently, when the liquid crystal cell P is conveyed forward and the second detection unit 145 stops detecting the liquid crystal cell P, a non-detection signal (OFF signal) is sent to the control unit 50 . The control unit 50, after a predetermined period has elapsed from the timing of this non-detection (OFF signal), sends a command signal for driving the third area sensor camera 141 and the fourth area sensor camera 143 to the third area sensor camera 141, and sent to the fourth area sensor camera 143, and the third area sensor camera 141 and the fourth area sensor camera 143 are driven according to the command signal, and the third and fourth corner portions B3, B4) is imaged. Here, the "predetermined period from the timing of the non-detection signal" depends on the distance between the second detection unit 145 and the third and fourth area sensor cameras 141 and 143, the size of the liquid crystal cell transport direction, and the liquid crystal cell transport speed. is set

The third and fourth area sensor cameras 141 and 143 include, for example, a CCD area camera and a CMOS area camera. A ring-shaped ring lighting unit is provided at a position in front of the imaging unit of the third and fourth area sensor cameras 141 and 143, and the carrying roller ( The third and fourth reflection lighting units 142 and 144 are disposed between R). The irradiated light from the ring lighting unit is reflected by the third and fourth reflection lighting units 142 and 144, and the end of the liquid crystal cell P and the end of the second optical film piece 21 are irradiated from the back side to form an end line (edge). line) stand out. Thereby, the end line (edge line) is clearly imaged. The third and fourth reflective lighting units 142 and 144 may include a reflector and a reflective member.

Further, as another embodiment, a structure in which only the lighting unit for illuminating the liquid crystal cell from the camera side is used and the reflection lighting unit is omitted is also possible. As another embodiment, a transmission light source may be disposed under the transport roller R and between adjacent transport rollers R, and an image of the transmitted light is captured by an area camera disposed above the transmission light source.

(Second image inspection process)

The second image inspection unit 53 detects a liquid crystal cell P in the transport direction y and in the direction x orthogonal to the transport direction from images obtained by imaging with the third and fourth area sensor cameras 141 and 143 The distance (Dx5 to Dx8, Dy5 to Dy8) between the end of the second optical film piece 21 and the end of the second optical film piece 21 is image-processed and calculated. A specific calculation method is omitted because it is the same method as that of the first image inspecting unit 51 .

(Second Judgment Process)

The second determination unit 54 determines the junction shift based on the distances Dx5 to Dx8 and Dy5 to Dy8 calculated by the second image inspection unit 53 . The second determination unit 54 calculates the difference between the previously stored (set) standard junction distance (set for each of the four corners) and the calculated Dx5 to Dx8 and Dy5 to Dy8, and the difference is a predetermined value (eg For example, if it is within ±100 to ±500 μm), it is judged as a good product, while if the difference does not fall within a predetermined value, it is judged as a defective product.

(Second alignment correction step)

When the second determination unit 54 determines that the joint is defective, the control unit 50 issues an alignment correction command to the second joint 134 of the joint. As a correction method, the method of fine-adjusting the angle of the peeling part 133, and the method of rotating-adjusting liquid crystal cell P with respect to a conveyance direction are mentioned, for example.

(Second Acceptance Process for Defective Products)

When a non-defective product is judged by the second determination unit 54, the non-defective liquid crystal cell P is transported to and stored in the non-defective storage unit 83 (second non-defective product transport step). On the other hand, when the second decision unit 54 determines that the defective liquid crystal cell P is branched from the fourth transfer unit 75 to the defective product storage unit 84 as shown in FIG. 1, transported and stored therein. do.

In this Embodiment 1, each part of a manufacturing system is controlled by the control part 50. The control unit 50 is composed of, for example, an information processing device and a dedicated circuit. The first and second image inspecting units and the first and second judging units are similarly constituted by information processing devices and dedicated circuits.

As another embodiment, the liquid crystal cell P of a good product may be transported in a separate inspection step without being accommodated in the storage unit 83 . In addition, as for the defective liquid crystal cell P, only the 2nd optical film piece 21 may peel from liquid crystal cell P, and a new 2nd optical film piece may be bonded to the 2nd surface P2.

(Embodiment 2)

In Embodiment 2, the method of capturing an image is different from Embodiment 1. As shown in Fig. 10, the first and second area sensor cameras 41 and 43 move the liquid crystal cell P and the rear side of the first optical film piece 11 by the first and second rollers 34a and 34b. Images are taken of the front first and second corner portions A1 and A2 of the liquid crystal cell P conveyed in a state where the portion is clamped. Similarly, in the third and fourth area sensor cameras 141 and 143, the liquid crystal cell P and the rear portion of the second optical film piece 21 are held by the third and fourth rollers 134a and 134b. Images of the front first and second corner portions B1 and B2 of the liquid crystal cell P conveyed in this state are captured.

According to this configuration, since the area sensor camera can capture images of the front two corner portions of the liquid crystal cell in a state where the rear portion of the panel (for example, the rear end portion) is clamped and supported by a pair of rolls, the space of the inspection area can be further reduced. can save Moreover, as a conveyance part which conveys a liquid crystal cell, for example, two corner parts can be imaged appropriately in the state which suppressed the vibration of the liquid crystal cell in the case of using a conveyance roller.

Further, in the second and fourth transport units 72 and 75, a roll disposed opposite to the transport roller R is disposed in front of the area sensor camera, and the liquid crystal cell P and the first optical film piece 11 are disposed. You may image the back two corner part of a liquid crystal cell with an area sensor camera in the state which clamped the front part.

(another embodiment)

Further, in the present embodiment, each cutting portion cuts the strip-shaped optical film and the pressure-sensitive adhesive in the width direction, and optical film pieces 11, 21 having a size corresponding to the liquid crystal cell P are placed on the carrier films 12, 22. However, the strip-shaped optical film and the pressure-sensitive adhesive may be cut in the width direction so as to avoid defective portions of the strip-shaped optical film.

In addition, as the optical film layered product roll 1, a strip-shaped optical film layered product 10 in which a strip-shaped optical film was laminated on a carrier film 12 via an adhesive was wound, but a strip-shaped optical film was used. You may use the optical film laminate roll in which the perforation line 10a of the width direction was formed in advance in the film, and the perforation line in which the optical film piece of the size corresponding to the liquid crystal cell P was arranged on the carrier film 12 was formed. . In the case of using an optical film layered product roll in which a perforated line is formed, the cut portion becomes unnecessary.

And in this embodiment 1, 2, although all the 1st and 2nd optical film pieces were bonded from the upper side of a liquid crystal cell, it is not limited to this. Arbitrary 1 sheet may be bonded together from the upper side of a liquid crystal cell, the remaining 1 sheet may be bonded together from the lower side of a liquid crystal cell, and both may be bonded together from the lower side of a liquid crystal cell.

In this Embodiment 1, a polarizing film is illustrated as an optical film. The polarizing film is formed by, for example, a polarizer (about 1.5 to 80 μm in thickness) and a polarizer protective film (generally about 1 to 500 μm in thickness) on one side or both sides of the polarizer with or without an adhesive. As other films constituting the optical film laminate 10, for example, retardation films such as λ/4 plate and λ/2 plate (thickness is generally 10 to 200 μm), visual compensation film, brightness enhancement film, surface A protective film etc. are mentioned. The range of the thickness of an optical film laminated body is 10 micrometers - 500 micrometers, for example. The adhesive interposed between the polarizing film and the carrier film is not particularly limited, and examples thereof include an acrylic adhesive, a silicone adhesive, and a urethane adhesive. The layer thickness of the adhesive is preferably in the range of 10 μm to 50 μm, for example. As the peeling force between the pressure-sensitive adhesive and the carrier film, for example, 0.15 (N/50 mm width sample) is exemplified, but is not particularly limited thereto. Peel force is measured according to JIS Z0237.

As the carrier film, conventionally known films such as plastic films (for example, polyethylene terephthalate-based films, polyolefin-based films, etc.) can be used. In addition, if necessary, a conventional suitable material such as one coated with an appropriate release agent such as silicone type, long chain alkyl type, fluorine type, molybdenum sulfide or the like can be used.

An optical display panel is one in which at least one piece of optical film is bonded to one side or both sides of an optical cell via an adhesive, and a drive circuit is incorporated as necessary. As for an optical cell, a liquid crystal cell and an organic electroluminescent cell are mentioned, for example. Any type of liquid crystal cell, such as a vertical alignment (VA) type and an in-plane switching (IPS) type, can be used. Any type of organic EL cell, such as a top emission method, a bottom emission method, and a double emission method, can be used, for example. The liquid crystal cell P shown in FIG. 1 has a configuration in which a liquid crystal layer is sealed between a pair of substrates (a first surface (visible side) P1 and a second surface (rear surface) P2) disposed opposite to each other. .

11: first optical film piece
21: 2nd optical film piece
34: first junction
41: first area sensor camera
43: second area sensor camera
51: first image inspection unit
52: first judging unit
53: second image inspection unit
54: second judging unit
141 Third area sensor camera
143: fourth area sensor camera
P: liquid crystal cell

Claims (18)

A strip-shaped first optical film layered body from a roll of a first optical film layered body having a first optical film having an adhesive and a strip-shaped first carrier film on which the first optical film is laminated via the adhesive. The first optical film piece obtained by unwinding and cutting at least the first optical film of the strip-shaped first optical film laminate in the width direction is bonded to the first surface of the optical cell while conveying the optical cell. 1 joining process;
While transporting the optical cell, the bonding position of the first optical film piece bonded to the first surface of the optical cell is aligned with the end portion of the optical cell in the width direction while being orthogonal to the transport direction. First and second area sensors A first imaging step of capturing an image with a camera;
In the first imaging step, from the image obtained by imaging with the first and second area sensor cameras, the edge of the optical cell and the first optical film piece in the conveying direction (y) and in the direction (x) orthogonal to the conveying direction A first image inspection step of calculating distances (Dx1 to Dx4, Dy1 to Dy4) with the end portion by image processing;
A first judgment step of determining a junction misalignment based on the distances Dx1 to Dx4 and Dy1 to Dy4 calculated in the first image inspection step,
In the first imaging step, the first and second corner portions in front of the transported optical cell are imaged with the first and second area sensor cameras, and the third and fourth corner portions at the rear end of the transported optical cell are captured by the first and second area sensor cameras. 1, taking an image with a second area sensor camera;
The first bonding step is configured to bond the first optical film piece to the optical cell by feeding the optical cell and the first optical film piece while being held by a pair of first and second rollers,
In the first imaging step, in a state in which the optical cell and the front or rear portion of the first optical film piece are sandwiched and supported by the first and second rollers, the front or rear portion of the conveyed optical cell is not clamped. A method of manufacturing an optical display panel comprising: capturing images of two corner portions with the first and second area sensor cameras. The strip-shaped second optical film layered body according to claim 1, which has a second optical film having an adhesive and a strip-shaped second carrier film on which the second optical film is laminated via the adhesive. The second optical film piece obtained by uncoiling the second optical film layered product and cutting at least the second optical film of the strip-shaped second optical film layered product in the width direction is transferred to the optical cell while conveying the optical cell. A second bonding step of bonding to the second surface;
While transporting the optical cell, the bonding position of the second optical film piece bonded to the second surface of the optical cell is aligned with the width end of the optical cell in a direction orthogonal to the transport direction, and the third and fourth area sensor cameras A second imaging step for imaging with
In the second imaging step, from the image obtained by imaging with the third and fourth area sensor cameras, the edge of the optical cell and the second optical film piece in the conveying direction (y) and in the direction (x) orthogonal to the conveying direction A second image inspection step of calculating a distance (Dx5 to Dx8, Dy5 to Dy8) from the end by image processing;
The method of manufacturing an optical display panel further comprising a second judgment step of determining a bonding misalignment based on the distances (Dx5 to Dx8, Dy5 to Dy8) calculated in the second image inspection step. The method according to claim 2, wherein the second imaging step captures images of the front first and second corner portions of the transported optical cell with the third and fourth area sensor cameras, and then captures images of the third and second corners at the rear end of the transported optical cell. A method of manufacturing an optical display panel, wherein a fourth corner portion is captured by the third and fourth area sensor cameras. The optical display according to claim 2 or 3, wherein the first imaging process, the first image inspection process, and the first judgment process are performed after the first bonding process and before the second bonding process. How to make a panel. The second optical film piece according to claim 3, wherein in the second bonding step, the second optical film piece is fed to the optical cell by feeding the optical cell and the second optical film piece while being held by a pair of third and fourth rollers. It is a configuration that connects,
In the second imaging step, the optical cell and the front or rear portion of the second optical film piece are conveyed in a state in which the optical cell and the second optical film piece are sandwiched and supported by the third and fourth rollers. A method of manufacturing an optical display panel, wherein the corner portion of the dog is captured by the third and fourth area sensor cameras. The optical display panel according to claim 1, wherein in the first image inspection step, when the cut end surface of the first optical film piece is inclined, the distance is calculated based on a line where the thickness of the film is maintained. manufacturing method. The optical display panel according to claim 2, wherein in the second image inspection step, when the cut end surface of the second optical film piece is inclined, the distance is calculated based on a line where the thickness of the film is maintained. manufacturing method. A strip-shaped first optical film layered body from a roll of a first optical film layered body having a first optical film having an adhesive and a strip-shaped first carrier film on which the first optical film is laminated via the adhesive. The first optical film piece obtained by unwinding and cutting at least the first optical film of the strip-shaped first optical film laminate in the width direction is bonded to the first surface of the optical cell while conveying the optical cell. 1 junction,
While conveying the optical cell, the bonding position of the first optical film piece bonded to the first surface of the optical cell is aligned with the end of the optical cell in the width direction while being orthogonal to the conveying direction, and imaging the end in the width direction first and second area sensor cameras that
Distance (Dx1) between the end of the optical cell and the end of the first optical film piece in the conveyance direction (y) and in the direction (x) orthogonal to the conveyance direction from the image obtained by imaging with the first and second area sensor cameras to Dx4, Dy1 to Dy4), a first image inspecting unit that performs image processing and calculates;
a first judgment unit that determines a junction misalignment based on the distances (Dx1 to Dx4, Dy1 to Dy4) calculated by the first image inspection unit;
A first detection unit is provided upstream of the transfer of the optical cell from the first and second area sensor cameras,
After a predetermined period of time after the first detection unit detects the transported optical cell, the first and second area sensor cameras image first and second corner portions in front of the transported optical cell;
After a predetermined period of time after the first detection unit ceases to detect the optical cell, the first and second area sensor cameras capture images of third and fourth corner portions at the rear end of the optical cell being transported;
The first joint portion has a pair of first and second rollers, and feeds the optical cell and the first optical film piece while being held by the first and second rollers, thereby attaching the first optical cell to the first optical film piece. bonding the optical film pieces;
In the first and second area sensor cameras, the optical cell and the front portion or the rear portion of the optical cell and the first optical film piece are sandwiched and supported by the first and second rollers, and the front side of the transported optical cell is not clamped. A manufacturing system for an optical display panel that captures images of two corner portions of a portion or a rear portion. The strip-shaped second optical film laminate according to claim 8, which has a second optical film having an adhesive and a strip-shaped second carrier film on which the second optical film is laminated via the adhesive, The second optical film piece obtained by uncoiling the second optical film layered product and cutting at least the second optical film of the strip-shaped second optical film layered product in the width direction is transferred to the optical cell while conveying the optical cell. A second joint portion joined to the second surface;
While conveying the optical cell, the bonding position of the second optical film piece bonded to the second surface of the optical cell is aligned with the width end of the optical cell in a direction orthogonal to the conveying direction, and imaging the width end 3, a fourth area sensor camera;
Distances (Dx5 to Dx8, a second image inspection unit that performs image processing and calculates Dy5 to Dy8);
and a second judgment unit that determines a bonding misalignment based on the distances (Dx5 to Dx8, Dy5 to Dy8) calculated by the second image inspection unit. 10. The method according to claim 9, wherein a second detection unit is provided upstream of the transfer of the optical cell from the third and fourth area sensor cameras,
After a predetermined period of time after the second detection unit detects the transported optical cell, the third and fourth area sensor cameras capture images of first and second corner portions in front of the transported optical cell;
Manufacturing of an optical display panel wherein, after a predetermined period of time after the second detection unit stops detecting the optical cell, the third and fourth area sensor cameras capture images of the third and fourth corner portions at the rear end of the optical cell to be conveyed. system. The method according to claim 9 or 10, wherein the image pickup processing by the first and second area sensor cameras, the image processing by the first image inspection unit, and the judgment processing by the first determination unit are bonding processing by the first bonding unit A manufacturing system for an optical display panel, which is performed after and before the bonding process by the second bonding part. 10. The method according to claim 9, wherein the second joint portion has a pair of third and fourth rollers, and the optical cell and the second optical film piece are fed out while being held by the third and fourth rollers, so that the optical cell and the second optical film piece are fed out. Bonding the second optical film piece to the cell,
In the third and fourth area sensor cameras, the front portion of the optical cell and the second optical film piece are transported in a state in which the front portion or the rear portion of the optical cell and the second optical film piece are sandwiched and supported by the third and fourth rollers. Or, an optical display panel manufacturing system that captures images of two corner portions of the rear portion. The manufacturing system of an optical display panel according to claim 8 , wherein the first image inspection unit calculates a distance based on a line where the thickness of the film is maintained when the cut end surface of the first optical film piece is inclined. . 10. The manufacturing system of an optical display panel according to claim 9, wherein the second image inspection unit calculates a distance based on a line where the thickness of the film is maintained when the cut end surface of the second optical film piece is inclined. . delete delete delete delete

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