JP2016118580A - Method for manufacturing optical display panel and system for manufacturing optical display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing an optical display panel capable of imaging four corners on both surfaces of the panel with a small number of area sensor cameras, achieving space saving of an inspection area and high accuracy inspection, and continuously producing good optical display panels.SOLUTION: A method for manufacturing an optical display panel includes: a first sticking step of sticking a first optical film piece to a first surface of an optical cell while transferring the optical cell; a first imaging step of imaging the sticking position of the first optical film piece stuck to the first surface of the optical cell with a first and a second area sensor camera while transferring the optical cell; a first image inspecting step of calculating the distance between an end of the optical cell and an end of the first optical film piece in a conveyance direction (y) and a direction (x) orthogonal to the conveyance direction from the image obtained by imaging the sticking position by image processing; and a first determining step of determining a sticking deviation on the basis of the calculated distance.SELECTED DRAWING: Figure 1

Description

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

  As a conventional method for checking the bonding quality, for example, in a state in which the optical display panel in which the optical film pieces are bonded to both main surfaces is stopped, the four corners of the panel are imaged with a camera, and the bonding shift is detected. There is a way to inspect. In this case, the camera and illumination are arranged at two corners on a pair of diagonals on the first surface of the panel, and the camera and illumination are arranged at two corners on a pair of diagonals on the other surface, respectively. To do. In order to image each of the four corners at a time in a stopped state, an inspection area for two panels was required during the inspection.

  Patent Document 1 describes a method of imaging all four corners of a polarizing plate (rectangular shape) bonded to a liquid crystal panel. Paragraph 0040 describes that it is necessary to stop the polarizing plate (and the liquid crystal panel) when using the area sensor camera.

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

  Patent Document 3 describes a method of imaging a liquid crystal display panel with an area inspection unit in a state where it is stopped after being conveyed to an inspection position.

JP 2011-197281 A JP 2004-233184 A JP 2012-27003 A

  However, the conventional inspection method and the inspections as disclosed in Patent Documents 1 and 3 have a problem that the production speed is lowered because the liquid crystal display panel is stopped and the area sensor camera is used for imaging. Also, four cameras are required to image the four corners of the panel.

  Patent Documents 1 and 3 describe a method of imaging a liquid crystal display panel while being conveyed by a line sensor camera. However, although this method can detect the bonding position (sticking deviation) in the transport direction, it is difficult to detect the sticking shift in the width direction perpendicular to the transport direction with high accuracy.

  The object of the present invention has been made in view of the above circumstances, and enables the high-accuracy inspection by enabling imaging of the four corners on both sides of the panel with a small area sensor camera and saving the inspection area. An object of the present invention is to provide an optical display panel manufacturing method and an optical display panel manufacturing system capable of continuously producing high-quality optical display panels.

  As a result of intensive studies in order to solve the above problems, the present invention has been completed.

The method for producing an optical display panel of the present invention includes a first optical film having a pressure-sensitive adhesive, and a strip-shaped first carrier film in which the first optical film is laminated via the pressure-sensitive adhesive. A first optical film piece obtained by feeding a belt-shaped first optical film laminate from a roll of the laminate, and cutting at least the first optical film in the width direction in the belt-like first optical film laminate. A first bonding step of bonding the first surface of the optical cell while conveying the optical cell;
While transporting the optical cell, the position of the first optical film piece bonded to the first surface of the optical cell is arranged in a direction orthogonal to the transport direction and in accordance with the width direction end of the optical cell. A first imaging step of imaging with the first and second area sensor cameras,
In the first imaging step, from the image obtained by imaging with the first and second area sensor cameras, the end portion of the optical cell in the transport direction (y) and the direction (x) perpendicular to the transport direction, and the A first image inspection step of calculating and calculating a distance (Dx1 to Dx4, Dy1 to Dy4) with the end of the first optical film piece;
And a first determination step of determining sticking displacement based on the distances (Dx1 to Dx4, Dy1 to Dy4) calculated in the first image inspection step.

  According to this configuration, the four corners on both sides of the panel can be imaged with a small area sensor camera, and the inspection area can be saved (can also be used as the transport area of the optical display panel), enabling high-precision inspection. As a high quality optical display panel can be continuously produced.

  As one embodiment of the invention, when it is determined to be defective in the first determination step, a first storage step for storing the defective optical cell, and a non-defective optical cell when the non-defective product is determined in the first determination step A first non-defective product transporting process for transporting the product to the subsequent stage.

  As one embodiment of the invention, the first imaging step is to image the first and second corners in front of the optical cell to be transported (downstream in the transport direction) with the first and second area sensor cameras, The first and second area sensor cameras capture images of the third and fourth corners behind the transported optical cell (upstream in the transport direction). That is, the first area sensor camera images the first and third corners, and the second area sensor camera images the second and fourth corners. The first corner and the third corner are disposed in parallel with the transport direction, and the second corner and the fourth corner are disposed in parallel with the transport direction. The first corner and the second corner are arranged in a direction orthogonal to the transport direction.

As one embodiment of the present invention, a second optical film laminate having a second optical film having a pressure-sensitive adhesive and a strip-shaped second carrier film on which the second optical film is laminated via the pressure-sensitive adhesive From the roll, the belt-shaped second optical film laminate is drawn out, and the second optical film piece obtained by cutting at least the second optical film in the belt-like second optical film laminate in the width direction is A second bonding step of bonding to the second surface of the optical cell while conveying the optical cell;
While transporting the optical cell, the second optical film piece bonded to the second surface of the optical cell is disposed in a direction perpendicular to the transport direction and aligned with the width end of the optical cell. 3, a second imaging step of imaging with a fourth area sensor camera;
In the second imaging step, from the image obtained by imaging with the third and fourth area sensor cameras, the end portion of the optical cell in the transport direction (y) and the direction (x) orthogonal to the transport direction, and the A second image inspection step of calculating the distance (Dx5 to Dx8, Dy5 to Dy8) with the end of the second optical film piece by image processing;
And a second determination step of determining sticking displacement based on the distances (Dx5 to Dx8, 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 being bonded to one surface, a bonding position inspection (sticking displacement inspection) can be performed on that surface.

  As one embodiment of the invention described above, when the second determination step determines that the optical cell is defective, the second storage step stores the defective optical cell, and the non-defective optical cell determines that the non-defective product is determined in the second determination step. A second non-defective product transporting step for transporting the product to the subsequent stage.

  As one embodiment of the invention, in the second imaging step, the first and second corners in front of the conveyed optical cell are imaged by the third and fourth area sensor cameras, and the conveyed optical cell The rear third and fourth corners are imaged by the third and fourth area sensor cameras. That is, the third area sensor camera images the first and third corners, and the fourth area sensor camera images the second and fourth corners.

  As one embodiment of the invention, the first imaging step, the first image inspection step, and the first determination step are performed after the first bonding step and before the second bonding step. Is called.

  According to this structure, before a 2nd bonding process, the optical cell (optical cell by which the optical film piece was affixed only on the one surface) with a bad sticking | shift misalignment can be excluded.

As one embodiment of the invention, the first laminating step includes feeding the optical cell and the first optical film piece while sandwiching the optical cell and the first optical film piece with a pair of first and second rollers. An optical film piece is bonded,
In the first imaging step, the first and second corners in front of the optical cell to be conveyed are sandwiched between the optical cell and the rear part of the first optical film piece by the first and second rollers. The first and second area sensor cameras capture images.

  According to this configuration, the first and second area sensor cameras in the first and second corners in front of the optical cell in a state where the rear portion (for example, the rear end portion) of the panel is sandwiched between the first and second rollers. Therefore, it is possible to further reduce the space of the inspection area. Further, as a transport unit that transports the optical cell, for example, when a transport roller is used, the optical cell may vibrate during transport. The first and second corners can be imaged with the vibration suppressed by holding the optical cell between the first and second rollers.

As one embodiment of the invention, in the second laminating step, the second and the second optical film pieces are sent out while sandwiching the optical cell and the second optical film piece with a pair of third and fourth rollers. An optical film piece is bonded,
In the second imaging step, the first and second corners in front of the conveyed optical cell are held in a state where the optical cell and the rear part of the second optical film piece are sandwiched between the third and fourth rollers. The third and fourth area sensor cameras capture images.

  According to this configuration, the first and second corners in front of the optical cell are the third and fourth area sensor cameras in a state where the rear portion (for example, the rear end portion) of the panel is sandwiched between the third and fourth rollers. Therefore, it is possible to further reduce the space of the inspection area. Further, as a transport unit that transports the optical cell, for example, when a transport roller is used, the optical cell may vibrate during transport. The first and second corners can be imaged while the vibration is suppressed by sandwiching the optical cell with the third and fourth rollers.

  As one embodiment of the invention, in the first image inspection step, a cut end surface of the first optical film piece (an end surface cut in a width direction intersecting (orthogonal) with the belt-like longitudinal direction) is inclined. In this case, the distance is calculated with reference to the line where the thickness of the film is maintained.

  According to this configuration, it is possible to read a line in which a stable thickness is always maintained, and to improve the accuracy of position inspection.

  As one embodiment of the invention, in the second image inspection step, the cut end surface of the second optical film piece (the end surface cut in the width direction intersecting (orthogonal) with the belt-like longitudinal direction) is inclined. In this case, the distance is calculated with reference to the line where the thickness of the film is maintained.

  According to this configuration, it is possible to read a line in which a stable thickness is always maintained, and to improve the accuracy of position inspection.

Another optical display panel manufacturing system of the present invention includes:
From 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, a strip-shaped first optical While feeding the film laminate, the first optical film piece obtained by cutting at least the first optical film in the band-shaped first optical film laminate in the width direction, while transporting the optical cell, the optical A first bonding part to be bonded to the first surface of the cell;
While transporting the optical cell, the position of the first optical film piece bonded to the first surface of the optical cell is arranged in a direction orthogonal to the transport direction and in accordance with the width direction end of the optical cell. , First and second area sensor cameras for imaging the width direction end,
From the images obtained by imaging with the first and second area sensor cameras, the end of the optical cell and the first optical film piece in the transport direction (y) and the direction (x) perpendicular to the transport direction A first image inspection unit that calculates the distance (Dx1 to Dx4, Dy1 to Dy4) from the end by image processing;
A first determination unit that determines sticking displacement based on the distances (Dx1 to Dx4, Dy1 to Dy4) calculated by the first image inspection unit.

  As one embodiment of the invention, when the first determination unit determines that the optical cell is defective, the first storage unit that stores the defective optical cell; and when the first determination unit determines that the product is non-defective, And a first non-defective product transport unit that transports the product to the subsequent stage.

As one embodiment of the invention, the first detection unit on the upstream side of the transport of the optical cell than the first and second area sensor camera,
The first and second area sensor cameras capture the first and second corners in front of the transported optical cell after a predetermined period of time after the first detection unit detects the transported optical cell. ,
After a predetermined period after the first detection unit no longer detects the optical cell, the first and second area sensor cameras capture the third and fourth corners behind the optical cell being conveyed.

As one embodiment of the present invention, a second optical film laminate having a second optical film having a pressure-sensitive adhesive and a strip-shaped second carrier film on which the second optical film is laminated via the pressure-sensitive adhesive From the roll, the belt-shaped second optical film laminate is drawn out, and the second optical film piece obtained by cutting at least the second optical film in the belt-like second optical film laminate in the width direction is A second laminating portion for laminating to the second surface of the optical cell while conveying the optical cell;
While transporting the optical cell, the position of the second optical film piece bonded to the second surface of the optical cell is arranged in a direction perpendicular to the transport direction and in accordance with the width end of the optical cell, Third and fourth area sensor cameras for imaging the width end;
The distance (Dx5) between the end of the optical cell and the end of the polarizing film in the transport direction (y) and the direction (x) orthogonal to the transport direction from the images obtained by imaging with the third and fourth area sensor cameras. To x8, Dy5 to y8), and a second image inspection unit for calculating by image processing;
And a second determination unit that determines sticking displacement based on the distances (Dx5 to Dx8, Dy5 to Dy8) calculated by the second image inspection unit.

  As one embodiment of the present invention, when the second determination unit determines that the optical cell is defective, the second storage unit that stores the defective optical cell, and the non-defective optical cell that is determined to be non-defective by the second determination unit And a second non-defective product transport section for transporting the product to the subsequent stage.

As one embodiment of the invention, a second detection unit is provided on the transport upstream side of the optical cell from the third and fourth area sensor cameras,
The third and fourth area sensor cameras capture the first and second corners in front of the transported optical cell after a predetermined period of time after the second detection unit detects the transported optical cell. ,
After a predetermined period after the second detection unit stops detecting the optical cell, the third and fourth area sensor cameras image the third and fourth corners at the rear end of the conveyed optical cell.

  As one embodiment of the invention, the imaging processing by the first and second area sensor cameras, the image processing by the first image inspection unit, and the determination processing by the first determination unit are performed after the bonding processing by the first bonding unit. And it is performed before the bonding process by a 2nd bonding part.

As one embodiment of the invention, the first bonding unit has a pair of first and second rollers, and the first and second rollers sandwich the optical cell and the first optical film piece. By feeding out, the first optical film piece is bonded to the optical cell,
In the first and second area sensor cameras, the first and second rollers in front of the optical cell being transported in a state where the optical cell and the rear portion of the first optical film piece are sandwiched between the first and second rollers. Take two corners.

As one embodiment of the invention described above, the second bonding portion has a pair of third and fourth rollers, and the optical cell and the second optical film piece are sandwiched between the third and fourth rollers. By feeding out, the second optical film piece is bonded to the optical cell,
In the third and fourth area sensor cameras, the first and first optical cells in front of the conveyed optical cell with the third and fourth rollers sandwiching the rear portion of the optical cell and the second optical film piece. Take two corners.

  As one embodiment of the invention, in the first image inspection section, the cut end surface of the first optical film piece (the end surface cut in the width direction intersecting (orthogonal) with the belt-like longitudinal direction) is inclined. In this case, the distance is calculated with reference to the line where the thickness of the film is maintained.

  As one embodiment of the invention, in the second image inspection section, the cut end surface of the second optical film piece (the end surface cut in the width direction intersecting (orthogonal) with the belt-like longitudinal direction) is inclined. In this case, the distance is calculated with reference to the line where the thickness of the film is maintained.

  The optical display panel manufacturing system of the present invention has the same functions and effects as those of the optical display panel manufacturing method.

Schematic which showed an example of the manufacturing system of an optical display panel. The figure explaining the inspection method of an image inspection part. The figure explaining the inspection method of an image inspection part. The figure explaining the inspection method of an image inspection part. The figure explaining the inspection method of an image inspection part. The figure which shows an example of a test | inspection image. The figure which shows an example of the measuring method. The figure which shows an example of the measuring method. The figure explaining the inspection method of an image inspection part. The figure explaining another example of the imaging method.

(Embodiment 1)
FIG. 1 is a schematic view of an optical display panel manufacturing system according to the first embodiment. 2-5 is a figure which shows the inspection method by an inspection part. FIG. 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.

  In the present embodiment, a liquid crystal cell will be described as an example of the optical cell, and a liquid crystal display panel will be described as an example of the optical display panel. Moreover, what is shown in FIG. 1 is used as a roll of an optical film laminated body. That is, as the first optical film laminate roll 1, a strip-shaped first optical film having an absorption axis in the longitudinal direction on the first carrier film 12 (first optical film piece 11 after cutting (film body 11a, adhesive 11b). ) Is formed, and the band-shaped first optical film laminate 10 is wound. Here, the first optical film laminate 10 has a width corresponding to the short side of the liquid crystal cell P (substantially shorter than the short side of the liquid crystal cell P). As the 2nd optical film laminated body roll 2, the strip | belt-shaped 2nd optical film which has an absorption axis in a longitudinal direction on the 2nd carrier film 22 (The 2nd optical film piece 21 (film main body 21a, adhesive 21b) after a cutting | disconnection). The belt-shaped second optical film laminate 20 is formed by being wound. Here, the second optical film laminate 20 has a width corresponding to the long side of the liquid crystal cell P (a width substantially shorter than the long side of the liquid crystal cell P).

  As shown in FIG. 1, the manufacturing system of the liquid crystal display panel according to the present embodiment includes a first transport unit 71 that transports the liquid crystal cell P to the first bonding unit 34, and a first surface P <b> 1 of the liquid crystal cell P. A second transport unit 72 that transports the liquid crystal cell P after the optical film piece 11 is bonded, an arrangement replacement unit 73 that inverts the upper and lower surfaces (P1, P2) and swaps the short side and the long side of the liquid crystal cell P in the transport direction. And a third transport part 74 (corresponding to the first non-defective product transport part) for transporting the liquid crystal cell P replaced by the placement replacement part 73 to the second bonding part 134, and a second surface P2 of the liquid crystal cell P. 2 4th conveyance part 75 (2nd good article conveyance) which conveys liquid crystal cell P (The liquid crystal cell of the state which bonded the optical film on both surfaces is called a "liquid crystal display panel.") After bonding the optical film piece 21. Part.). Each transport unit includes a plurality of transport rollers R for transporting the liquid crystal cell P by rotating around a rotation axis parallel to a direction orthogonal to the transport direction. In addition to the conveying roller, a suction plate or the like may be included.

(Liquid crystal cell transport process)
From the storage unit 81 that stores the liquid crystal cell P, the liquid crystal cell P is disposed on the first transport unit 71 so that the first surface P1 is the top surface, and is transported to the first bonding unit 34 by the rotation of the transport roller. The

(First optical film laminate feeding process, optical film cutting process)
On the other hand, the first optical film laminate 10 fed from the first optical film laminate roll 1 is left without cutting the first carrier film 12 at the cutting portion 31 while adsorbing and fixing the first carrier film 12 side. The first optical film is cut into a predetermined size (length corresponding to the long side of the liquid crystal cell P (substantially shorter than the long side)), and a plurality of first optical films are formed on the first carrier film 12. A piece 11 is formed. Examples of the cutting unit 31 include cutting using a blade (cutting with a cutting blade) and cutting with a laser.

  An example of the cut portion 10a after being cut is indicated by an arrow in FIG. 1, but the cut interval is deliberately drawn for easy explanation. When the blade is a double-edged blade, the cut surface is inclined as shown in FIG. 8 as it advances in the cutting depth direction. In the case of a single blade, the cut surface at the inclined blade surface is inclined as shown in FIG. A measuring method in the case of the inclined cutting surface will be described later.

  A configuration in which a nip roller (not shown) is arranged on the upstream side or the downstream side of the cutting part 31 and conveys the first optical film laminate 10 may be adopted. Note that nip rollers may be arranged on the upstream side and the downstream side of the cutting portion 31.

(Tension adjustment process)
In the cutting process of the first optical film laminate 10 and the subsequent bonding process, the tension adjusting unit 32 is used to enable continuous processing so as not to interrupt the process for a long time and to adjust the slackness of the film. Is provided. The tension adjustment unit 32 includes a dancer mechanism using a weight, for example. A configuration in which a nip roller (not shown) is arranged on the upstream side or the downstream side of the tension adjusting unit 32 and conveys the first optical film laminate 10 may be adopted. Note that the nip rollers may be arranged on the upstream side and the downstream side of the tension adjusting unit 32.

(Peeling process)
The first optical film laminate 10 is wound around the first peeling portion 33 and reversed, and the first optical film piece 11 is peeled from the first carrier film 12. The first carrier film 12 is wound on a roll by the winding unit 35. The winding unit 35 has a roll and a rotation drive unit, and the rotation drive unit rotates the roll so that the first carrier film 12 is wound around the roll. Moreover, the structure which a nip roller not shown is arrange | positioned in the upstream or downstream of the peeling part 33, and conveys the 1st optical film laminated body 10 or the 1st carrier film 12 may be sufficient. Note that the nip rollers may be disposed on the upstream side and the downstream side of the peeling portion 33.

(1st bonding process)
The 1st bonding part 34 bonds the 1st optical film piece 11 peeled from the 1st carrier film 12 to the 1st surface P1 of the liquid crystal cell P via the adhesive 11b, conveying the liquid crystal cell P. . The 1st bonding part 34 is comprised with a pair of 1st roller 34a and 2nd roller 34b. Either one may be a driving roller and the other may be a driven roller, and both rollers may be driving rollers. The first optical film piece 11 is affixed to the first surface P1 of the liquid crystal cell P by feeding the first optical film piece 11 and the liquid crystal cell P while sandwiching the first optical film piece 11 and the liquid crystal cell P by the pair of first roller 34a and second roller 34b. Match.

(First imaging step)
The liquid crystal cell P after the first optical film piece 11 is bonded to the first surface P <b> 1 of the liquid crystal cell P is transported downstream by the second transport unit 72. While the liquid crystal cell P is being transported by the second transport unit 72, the direction of the first optical film piece 11 bonded to the first surface P1 of the liquid crystal cell P is perpendicular to the transport direction (y) (x) In addition, images are taken by the first area sensor camera 41 and the second area sensor camera 43 arranged in accordance with the width direction end portions (A1 to A4) of the liquid crystal cell P. The first area sensor camera 41 captures an image of the first corner A1 in front of the liquid crystal cell P and the third corner A3 behind it. On the other hand, the second area sensor camera 43 images the second corner A2 in front of the liquid crystal cell P and the fourth corner A4 behind it.

  The first detection unit 45 is disposed above the second transport unit 72, and the first area sensor camera 41 and the second area sensor camera 43 are disposed downstream thereof. First, as shown in FIG. 2, the first detection unit 45 detects the front part of the liquid crystal cell P. As shown in FIG. 3, the first area sensor camera 41 and the second area sensor camera 43 are driven and imaged after a predetermined period of time has elapsed since this detection. Here, the “predetermined period from detection” is set by the distance between the first detection unit 45 and the first and second area sensors 41 and 43, the size in the liquid crystal cell transport direction, and the liquid crystal cell transport speed. The first detection unit 45 can be composed of a reflective optical sensor or the like. The control unit 50 that has received the detection signal (ON signal) from the first detection unit 45 outputs a command signal for driving the first area sensor camera 41 and the second area sensor camera 43 after a predetermined period has elapsed from the timing of the detection signal. The first area sensor camera 41 and the second area sensor camera 43 are sent to the first area sensor camera 41, and the first area sensor camera 41 and the second area sensor camera 43 are driven in response to the command signal, and the first and second corner portions A1 and A2 are driven. Take an image.

  Next, as shown in FIG. 4, when the liquid crystal cell P is conveyed forward and the first detection unit 45 no longer detects the liquid crystal cell P, a non-detection signal (OFF signal) is sent to the control unit 50. As shown in FIG. 5, the control unit 50 outputs a command signal for driving the first area sensor camera 41 and the second area sensor camera 43 after a predetermined period from the non-detection (OFF signal) timing. The first area sensor camera 41 and the second area sensor camera 43 are driven in accordance with the command signal to image the third and fourth corners A3 and A4. Here, the “predetermined period from the timing of the non-detection signal” is set by the distance between the first detection unit 45 and the first and second area sensors 41, 43, the size in the liquid crystal cell transport direction, and the liquid crystal cell transport speed. The

  Examples of the first and second area sensor cameras 41 and 43 include a CCD area camera and a CMOS area camera. A ring-shaped ring illumination unit is provided in front of the imaging units of the first and second area sensor cameras 41 and 43, and is positioned adjacent to the imaging area of the camera, below the conveyance roller R, and adjacent to the conveyance roller. The 1st, 2nd reflective illumination parts 42 and 44 are arrange | positioned between R. Irradiation light from the ring illumination part is reflected by the first and second reflection illumination parts 42 and 44, and the end part of the liquid crystal cell P and the 11 end part of the first optical film piece are irradiated from the back surface. Line). Thereby, an edge part line (edge line) is imaged clearly. The 1st, 2nd reflective illumination parts 42 and 44 can be comprised with a reflective mirror and a reflective member.

  FIG. 6 shows an example of an image of the second corner A2 captured by the second area sensor camera 43. BM is a black matrix inside the liquid crystal cell.

  As another embodiment, a configuration in which the reflection illumination unit is omitted by using only the illumination unit that illuminates the liquid crystal cell from the camera side may be employed. In another embodiment, a transmission light source may be arranged between adjacent conveyance rollers R below the conveyance roller R, and a transmitted light image may be captured by an area camera disposed above the transmission light source.

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

  Specifically, this will be described with reference to FIGS. The first image inspection unit 51 performs image processing on an image obtained by imaging with the second area sensor camera 43. FIG. 6 shows an image obtained by image processing. At this time, the distance (Dy2) between the end portion P0y of the liquid crystal cell P and the end portion L0y of the first optical film piece 11 in the transport direction (y) is obtained by analyzing and adding the number of 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 added by analyzing the number of pixels. Ask. The x-direction measurement position when obtaining Dy2 is a position at a distance Mx2 from the x-direction end of the liquid crystal cell P. On the other hand, the y-direction measurement position when obtaining Dx2 is a position My2 from the y-direction end of the liquid crystal cell P. The distances Mx2 and My2 are set in advance. Other distances Dx1, Dx3, Dx4, Dy1, Dy3, and Dy4 can be calculated in the same manner. The distances Mx1, Mx3, Mx4, My1, My3, My4 in this case are similarly set in advance.

  Further, as shown in FIG. 8, the first image inspection unit 51 has the end P0y of the liquid crystal cell P and the first optical film when the end of the first optical film piece 11 is inclined inward. The distance from the end portion L01 of the piece 11 is calculated. That is, the distance is calculated based on the edge line in which the thickness of the first optical film piece 11 is maintained. As a result, it is possible to read a line in which a stable thickness is always maintained, and to improve the accuracy of position inspection. In FIG. 8, the edge of the bonding surface of the 1st optical film piece 11 protrudes, and the surface which is not a bonding surface is an example which is retracted in the film surface inward. For example, when a double-edged blade is used in the first cutting part 31, it becomes a cut surface of the first optical film piece 11 as shown in FIG.

(First determination step)
The first determination unit 52 determines the misalignment based on the distances (Dx1 to Dx4, Dy1 to Dy4) calculated by the first image inspection unit 51. The 1st determination part 52 calculates the difference with Dx1-Dx4 and Dy1-Dy2 which were calculated | required with the reference | standard bonding distance (each set of 4 corner parts) preserve | saved beforehand (set), and the If the difference is within a predetermined value (for example, ± 100 to ± 500 μm), it is determined as a non-defective product. On the other hand, if the difference does not fall within the predetermined value, it is determined as a defective product.

(First alignment correction process)
When a failure is determined by the first determination unit 52, the control unit 50 instructs the first bonding unit 34 to perform alignment correction of the bonding unit. Examples of the correction method include a method of finely adjusting the angle of the peeling portion 33 and a method of rotating and adjusting the liquid crystal cell P with respect to the transport direction.

(First storage process for defective products)
When the first determination unit 52 determines that the liquid is defective, the defective liquid crystal cell P is branched from the second transfer unit 72 to the defective product storage unit 81 and is transported and stored as shown in FIG. On the other hand, when the non-defective product is determined by the first determination unit 52, the non-defective liquid crystal cell P is transported to the subsequent stage (first non-defective product transport step).

  The defective liquid crystal cell P may be transported to the storage unit 81 after the first optical film piece 11 is peeled off from the liquid crystal cell P.

  As another embodiment of the first image inspection unit 51 and the first determination unit 52, the first image inspection unit 51 is a distance between the end of the BM in the x and y directions and the end of the first optical film piece 11. Can also be calculated. And the 1st determination part 52 can determine sticking shift | offset | difference based on the distance.

(Replacement process)
The arrangement replacement unit 73 switches the short side and the long side of the liquid crystal cell P in the transport direction (y) by inverting the top and bottom surfaces (P1, P2) of the good liquid crystal cell P transported by the second transport unit 72. The arrangement replacement unit 73 can adopt a known mechanism as appropriate. In the first embodiment, the arrangement replacement unit 73 includes a rotation unit that sucks the liquid crystal cell P and horizontally rotates it by 90 °, and an inversion unit that sucks the liquid crystal cell P and reverses the front and back.

(Liquid crystal cell transport process)
The liquid crystal cell P is conveyed by the 3rd conveyance part 74 to the 2nd bonding part 134 after the process of the arrangement | positioning replacement part 73. FIG.

(Second optical film laminate feeding process, optical film cutting process)
The second optical film laminate 20 fed out from the second optical film laminate roll 2 is left without cutting the second carrier film 22 at the cutting portion 131 while adsorbing and fixing the second carrier film 22 side. 2 Cut the optical film into a predetermined size (length corresponding to the short side of the liquid crystal cell P (substantially shorter than the short side)), and place a plurality of second optical film pieces 21 on the second carrier film. Form. Examples of the cutting unit 131 include cutting using a blade (cutting with a cutting blade) and laser cutting.

  An example of the cut portion 20a after being cut is shown by an arrow in FIG. 1, but the cut interval is deliberately drawn for easy explanation.

  A configuration in which a nip roller (not shown) is arranged on the upstream side or the downstream side of the cutting part 131 and conveys the second optical film laminate 20 may be adopted. Note that the nip rollers may be arranged on the upstream side and the downstream side of the cutting part 131.

(Tension adjustment process)
In the cutting process of the second optical film laminate 20 and the subsequent bonding process, the tension adjusting unit 132 is used to enable continuous processing so as not to interrupt the process for a long time and to adjust the slackness of the film. Is provided. The tension adjusting unit 132 includes a dancer mechanism using a weight, for example. A configuration in which a nip roller (not shown) is arranged on the upstream side or the downstream side of the tension adjusting unit 132 and conveys the second optical film laminate 20 may be adopted. Note that the nip rollers may be arranged on the upstream side and the downstream side of the tension adjusting unit 132.

(Peeling process)
The second optical film laminate 20 is wound around the second peeling portion 133 and reversed, and the second optical film piece 21 is peeled from the second carrier film 22. The second carrier film 22 is wound on a roll by the winding unit 135. The winding unit 135 includes a roll and a rotation driving unit, and the rotation driving unit rotates the roll to wind the second carrier film 22 around the roll. Moreover, the structure which a nip roller not shown is arrange | positioned in the upstream or downstream of the peeling part 133, and conveys the 2nd optical film laminated body 20 or the 2nd carrier film 22 may be sufficient. Note that nip rollers may be arranged on the upstream side and the downstream side of the peeling portion 133.

(2nd bonding process)
The 2nd bonding part 134 bonds the 2nd optical film piece 21 peeled from the 2nd carrier film 22 to the 2nd surface P2 of the liquid crystal cell P through the adhesive 21b, conveying the liquid crystal cell P. . The 2nd bonding part 134 is comprised with a pair of 3rd roller 134a and the 4th roller 134b. Either one may be a driving roller and the other may be a driven roller, and both rollers may be driving rollers. The second optical film piece 21 is affixed to the second surface P2 of the liquid crystal cell P by feeding the second optical film piece 21 and the liquid crystal cell P while sandwiching the second optical film piece 21 and the liquid crystal cell P by the pair of third roller 134a and fourth roller 134b. Match.

(Second imaging step)
The liquid crystal cell P (liquid crystal display panel) after the second optical film piece 21 is bonded to the second surface P <b> 2 of the liquid crystal cell P is transported downstream by the fourth transport unit 75. While transporting the liquid crystal cell P by the fourth transport unit 75, the direction (x) perpendicular to the transport direction (y) of the position of the second optical film piece 21 bonded to the second surface P2 of the liquid crystal cell P And it images with the 3rd area sensor camera 141 and the 4th area sensor camera 143 which are arrange | positioned according to the width direction edge part (B1-B4) of liquid crystal cell P (refer FIG. 9). The first corner B1 in front of the liquid crystal cell P and the third corner B3 behind it are imaged by the third area sensor camera 141. On the other hand, the second corner B2 in front of the liquid crystal cell P and the fourth corner B4 behind it are imaged by the fourth area sensor camera 143.

  As shown in FIG. 9, the second detection unit 145 is disposed above the fourth transport unit 75, and the third area sensor camera 141 and the fourth area sensor camera 143 are disposed on the downstream side thereof. The second detection unit 145 detects the front part of the liquid crystal cell P. The third area sensor camera 141 and the fourth area sensor camera 143 are driven and imaged after a predetermined period of time has elapsed since this detection. 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 in the liquid crystal cell transport direction, and the liquid crystal cell transport speed. The second detection unit 145 can be composed of a reflective optical sensor or the like. The control unit 50 that has received the detection signal (ON signal) from the second detection unit 145 provides a command signal for driving the third area sensor camera 141 and the fourth area sensor camera 143 after a predetermined period has elapsed from the timing of the detection signal. It is sent to the third area sensor camera 141 and the fourth area sensor camera 143, and in response to the command signal, the third area sensor camera 141 and the fourth area sensor camera 143 are driven to move the first and second corners B1 and B2. Take an image.

  Next, when the liquid crystal cell P is conveyed forward and the second detection unit 145 does not detect the liquid crystal cell P, a non-detection signal (OFF signal) is sent to the control unit 50. The control unit 50 outputs a command signal for driving the third area sensor camera 141 and the fourth area sensor camera 143 after a predetermined period from the non-detection (OFF signal) timing to the third area sensor camera 141 and the fourth area sensor. In response to the command signal, the third area sensor camera 141 and the fourth area sensor camera 143 are driven to image the third and fourth corners B3 and B4. Here, the “predetermined period from the timing of the non-detection signal” is set according to the distance between the second detection unit 145 and the third and fourth area sensor cameras 141 and 143, the size in the liquid crystal cell transport direction, and the liquid crystal cell transport speed. Is done.

  Examples of the third and fourth area sensor cameras 141 and 143 include a CCD area camera and a CMOS area camera. A ring-shaped ring illumination unit is provided at a position in front of the imaging units of the third and fourth area sensor cameras 141 and 143, and is adjacent to the imaging area of the camera, below the conveyance roller R, and adjacent to the conveyance roller R. Third and fourth reflective illumination units 142 and 144 are disposed between the two. Irradiation light from the ring illumination unit is reflected by the third and fourth reflection illumination units 142 and 144, and the end portion of the liquid crystal cell P and the end portion of the second optical film piece 21 are irradiated from the back surface. Line). As a result, the end line (edge line) is clearly imaged. The 3rd, 4th reflective illumination parts 142 and 144 can be comprised with a reflective mirror and a reflective member.

  As another embodiment, a configuration in which the reflection illumination unit is omitted by using only the illumination unit that illuminates the liquid crystal cell from the camera side may be employed. In another embodiment, a transmission light source may be arranged between adjacent conveyance rollers R below the conveyance roller R, and a transmitted light image may be captured by an area camera disposed above the transmission light source.

(Second image inspection process)
The second image inspection unit 53 detects the liquid crystal cell P in the transport direction (y) and the direction (x) orthogonal to the transport direction from the images obtained by the third and fourth area sensor cameras 141 and 143. The distance (Dx5 to Dx8, Dy5 to Dy8) between the end and the end of the second optical film piece 21 is calculated by image processing. Since a specific calculation method is the same as that of the first image inspection unit 51, a description thereof will be omitted.

(Second determination step)
The second determination unit 54 determines the misalignment based on the distances (Dx5 to Dx8, Dy5 to Dy8) calculated by the second image inspection unit 53. The second determination unit 54 calculates the difference between the Dx5 to Dx8 and Dy5 to Dy8 that are calculated and stored in advance (set) reference bonding distance (set to each of the four corners), If the difference is within a predetermined value (for example, ± 100 to ± 500 μm), it is determined as a non-defective product. On the other hand, if the difference does not fall within the predetermined value, it is determined as a defective product.

(Second alignment correction process)
When the second determination unit 54 determines a defect, the control unit 50 instructs the second bonding unit 134 to perform alignment correction on the bonding unit. Examples of the correction method include a method of finely adjusting the angle of the peeling portion 133 and a method of adjusting the rotation of the liquid crystal cell P with respect to the transport direction.

(Second storage process for defective products)
When the non-defective product is determined by the second determination unit 54, the non-defective liquid crystal cell P is transported to and stored in the non-defective product storage unit 83 (second good product transport step). On the other hand, when it is determined as defective by the second determination unit 54, as shown in FIG. 1, the defective liquid crystal cell P is branched from the 54th transport unit 75 to the defective product storage unit 84 and is transported and stored.

  In the first embodiment, each part of the manufacturing system is controlled by the control unit 50. For example, the control unit 50 includes an information processing device and a dedicated circuit. Similarly, the first and second image inspection units, the first and second determination units are configured by an information processing device and a dedicated circuit.

  As another embodiment, the non-defective liquid crystal cell P may be transferred to another inspection process without being stored in the storage portion 83. Further, in the defective liquid crystal cell P, only the second optical film piece 21 may be peeled off from the liquid crystal cell P, and a new second optical film piece may be bonded to the second surface P2.

(Embodiment 2)
In the second embodiment, a method for capturing an image is different from that in the first embodiment. As shown in FIG. 10, the first and second area sensor cameras 41 and 43 are transported in a state where the rear portions of the liquid crystal cell P and the first optical film piece 11 are sandwiched between the first and second rollers 34a and 34b. The first and second corners A1 and A2 in front of the liquid crystal cell P to be imaged are imaged. Similarly, the third and fourth area sensor cameras 141 and 143 are transported with the liquid crystal cell P and the rear portion of the second optical film piece 21 sandwiched between the third and fourth rollers 134a and 134b. The first and second corners B1 and B2 in front of the liquid crystal cell P are imaged.

  According to this configuration, since the two corners in front of the liquid crystal cell can be imaged by the area sensor camera with the panel rear portion (for example, the rear end portion) held between the pair of rolls, the space in the inspection area Can further save space. Moreover, as a conveyance part which conveys a liquid crystal cell, two corner | angular parts can be imaged suitably in the state which suppressed the vibration of the liquid crystal cell when the conveyance roller is used, for example.

  Furthermore, the 2nd, 4th conveyance parts 72 and 75 have arrange | positioned the roll arrange | positioned facing the conveyance roller R ahead of an area sensor camera, and clamped the front part of the liquid crystal cell P and the 1st optical film piece 11 Thus, the two corners behind the liquid crystal cell may be imaged with an area sensor camera.

(Another embodiment)
Moreover, in this embodiment, each cutting part cut | disconnects a strip | belt-shaped optical film and an adhesive in the width direction, and the optical film piece (11, 11) of a magnitude | size corresponding to the liquid crystal cell P on a carrier film (12, 22). 21) is formed, however, the band-shaped optical film and the pressure-sensitive adhesive may be cut in the width direction so as to avoid a defective portion of the band-shaped optical film.

  Furthermore, as an optical film laminated body roll (1), what wound the strip | belt-shaped optical film laminated body (10) on which the strip | belt-shaped optical film was laminated | stacked through the adhesive on the carrier film (12) is used. However, a notched optical film in which a cut line (10a) in the width direction is formed in advance in a belt-shaped optical film, and optical film pieces having a size corresponding to the liquid crystal cell P are arranged on the carrier film (12). A laminate roll may be used. When the cut optical film laminate roll is used, the cutting portion is unnecessary.

  In Embodiments 1 and 2, all of the first and second optical film pieces are bonded from the upper side of the liquid crystal cell. However, the present invention is not limited to this. Either one may be bonded from the upper side of the liquid crystal cell, and the remaining one may be bonded from the lower side of the liquid crystal cell, or both may be bonded from the lower side of the liquid crystal cell.

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

  As the carrier film, for example, a conventionally known film such as a plastic film (for example, a polyethylene terephthalate film, a polyolefin film, or the like) can be used. In addition, if necessary, an appropriate material according to the prior art such as a silicone-based, long-chain alkyl-based, fluorine-based or molybdenum sulfide-coated material may be used.

  In the optical display panel, at least an optical film piece is bonded to one side or both sides of an optical cell via an adhesive, and a drive circuit is incorporated as necessary. Examples of the optical cell include a liquid crystal cell and an organic EL cell. As the liquid crystal cell, for example, an arbitrary type such as a vertical alignment (VA) type or an in-plane switching (IPS) type can be used. As the organic EL cell, for example, an arbitrary type such as a top emission method, a bottom emission method, a double emission method, or the like can be used. The liquid crystal cell P shown in FIG. 1 has a configuration in which a liquid crystal layer is sealed between a pair of opposed substrates (a first surface (viewing side surface) P1 and a second surface (back surface) P2).

11 1st optical film piece 21 2nd optical film piece 34 1st bonding part 41 1st area sensor camera 43 2nd area sensor camera 51 1st image inspection part 52 1st determination part 53 2nd image inspection part 54 2nd Determination unit 141 third area sensor camera 143 fourth area sensor camera
P LCD cell

Claims (18)

From 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, a strip-shaped first optical While feeding the film laminate, the first optical film piece obtained by cutting at least the first optical film in the band-shaped first optical film laminate in the width direction, while transporting the optical cell, the optical A first bonding step for bonding to the first surface of the cell;
While transporting the optical cell, the position of the first optical film piece bonded to the first surface of the optical cell is arranged in a direction orthogonal to the transport direction and in accordance with the width direction end of the optical cell. A first imaging step of imaging with the first and second area sensor cameras,
In the first imaging step, from the image obtained by imaging with the first and second area sensor cameras, the end portion of the optical cell in the transport direction (y) and the direction (x) perpendicular to the transport direction, and the A first image inspection step of calculating and calculating a distance (Dx1 to Dx4, Dy1 to Dy4) with the end of the first optical film piece;
And a first determination step of determining sticking displacement based on the distances (Dx1 to Dx4, Dy1 to Dy4) calculated in the first image inspection step.   In the first imaging step, the first and second corners in front of the conveyed optical cell are imaged by the first and second area sensor cameras, and the third and fourth at the rear end of the conveyed optical cell. The method for manufacturing an optical display panel according to claim 1, wherein corners are imaged by the first and second area sensor cameras. From the roll of the second optical film laminate having the second optical film having the adhesive and the strip-shaped second carrier film on which the second optical film is laminated via the adhesive, the strip-shaped second optical While feeding the film laminate, the second optical film piece obtained by cutting at least the second optical film in the width direction of at least the second optical film laminate in the band-like shape, while transporting the optical cell, A second bonding step for bonding to the second surface of the optical cell;
While transporting the optical cell, the second optical film piece bonded to the second surface of the optical cell is disposed in a direction perpendicular to the transport direction and aligned with the width end of the optical cell. 3, a second imaging step of imaging with a fourth area sensor camera;
In the second imaging step, from the image obtained by imaging with the third and fourth area sensor cameras, the end portion of the optical cell in the transport direction (y) and the direction (x) orthogonal to the transport direction, and the A second image inspection step of calculating the distance (Dx5 to Dx8, Dy5 to Dy8) with the end of the second optical film piece by image processing;
The optical display panel according to claim 1, further comprising a second determination step of determining sticking displacement based on the distance (Dx5 to Dx8, Dy5 to Dy8) calculated in the second image inspection step. Manufacturing method.   In the second imaging step, the first and second corners in front of the conveyed optical cell are imaged by the third and fourth area sensor cameras, and the third and fourth at the rear end of the conveyed optical cell. The manufacturing method of the optical display panel of Claim 3 which image | photographs a corner | angular part with the said 3rd, 4th area sensor camera.   The first imaging step, the first image inspection step, and the first determination step are performed after the first pasting step and before the second pasting step. The manufacturing method of the optical display panel of description. 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 sandwiching the optical cell and the first optical film piece by a pair of first and second rollers. There,
In the first imaging step, the first and second corners in front of the optical cell to be conveyed are sandwiched between the optical cell and the rear part of the first optical film piece by the first and second rollers. The method for manufacturing an optical display panel according to claim 2, wherein the first and second area sensor cameras are used for imaging. The second bonding step is configured to bond the second optical film piece to the optical cell by feeding the optical cell and the second optical film piece while sandwiching the optical cell and the second optical film piece with a pair of third and fourth rollers. There,
In the second imaging step, the first and second corners in front of the conveyed optical cell are held in a state where the optical cell and the rear part of the second optical film piece are sandwiched between the third and fourth rollers. The method for manufacturing an optical display panel according to claim 4, wherein the third and fourth area sensor cameras are configured to capture images.   In the first image inspection step, when the cut end surface of the first optical film piece is inclined, the distance is calculated with reference to a line in which the thickness of the film is maintained. The manufacturing method of the optical display panel of any one of Claims 1.   4. The distance according to claim 3, 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 in which the thickness of the film is maintained. Manufacturing method of optical display panel. From 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, a strip-shaped first optical While feeding the film laminate, the first optical film piece obtained by cutting at least the first optical film in the band-shaped first optical film laminate in the width direction, while transporting the optical cell, the optical A first bonding part to be bonded to the first surface of the cell;
While transporting the optical cell, the position of the first optical film piece bonded to the first surface of the optical cell is arranged in a direction orthogonal to the transport direction and in accordance with the width direction end of the optical cell. , First and second area sensor cameras for imaging the width direction end,
From the images obtained by imaging with the first and second area sensor cameras, the end of the optical cell and the first optical film piece in the transport direction (y) and the direction (x) perpendicular to the transport direction A first image inspection unit that calculates the distance (Dx1 to Dx4, Dy1 to Dy4) from the end by image processing;
An optical display panel manufacturing system comprising: a first determination unit that determines sticking displacement based on distances (Dx1 to Dx4, Dy1 to Dy4) calculated by the first image inspection unit. The first and second area sensor camera has a first detection unit on the upstream side of the transport of the optical cell,
The first and second area sensor cameras capture the first and second corners in front of the transported optical cell after a predetermined period of time after the first detection unit detects the transported optical cell. ,
After a predetermined period after the first detection unit no longer detects the optical cell, the first and second area sensor cameras image the third and fourth corners of the rear end of the optical cell to be transported, The system for manufacturing an optical display panel according to claim 10. From the roll of the second optical film laminate having the second optical film having the adhesive and the strip-shaped second carrier film on which the second optical film is laminated via the adhesive, the strip-shaped second optical While feeding the film laminate, the second optical film piece obtained by cutting at least the second optical film in the width direction of at least the second optical film laminate in the band-like shape, while transporting the optical cell, A second bonding portion to be bonded to the second surface of the optical cell;
While transporting the optical cell, the position of the second optical film piece bonded to the second surface of the optical cell is arranged in a direction perpendicular to the transport direction and in accordance with the width end of the optical cell, Third and fourth area sensor cameras for imaging the width end;
The distance (Dx5) between the end of the optical cell and the end of the polarizing film in the transport direction (y) and the direction (x) orthogonal to the transport direction from the images obtained by imaging with the third and fourth area sensor cameras. To x8, Dy5 to y8), and a second image inspection unit for calculating by image processing;
The optical display panel according to claim 10, further comprising: a second determination unit that determines sticking displacement based on the distances (Dx5 to Dx8, Dy5 to Dy8) calculated by the second image inspection unit. Manufacturing system. A second detector on the upstream side of the optical cell than the third and fourth area sensor cameras;
The third and fourth area sensor cameras capture the first and second corners in front of the transported optical cell after a predetermined period of time after the second detection unit detects the transported optical cell. ,
The third and fourth area sensor cameras image the third and fourth corners at the rear end of the conveyed optical cell after a predetermined period after the second detection unit no longer detects the optical cell. The optical display panel manufacturing system according to claim 12.   The imaging processing by the first and second area sensor cameras, the image processing by the first image inspection unit, and the determination processing by the first determination unit are after the bonding processing by the first bonding unit, and the second bonding The manufacturing system of the optical display panel of Claim 12 or 13 performed before the bonding process by a part. The first laminating portion has a pair of first and second rollers, and is sent to the optical cell by sandwiching the optical cell and the first optical film piece with the first and second rollers. Bonding the first optical film piece,
In the first and second area sensor cameras, the first and second rollers in front of the optical cell being transported in a state where the optical cell and the rear portion of the first optical film piece are sandwiched between the first and second rollers. The system for manufacturing an optical display panel according to claim 11, wherein the two corners are imaged. The second laminating portion has a pair of third and fourth rollers, and the third and fourth rollers feed out the optical cell and the second optical film piece while sandwiching the optical cell. Bonding the second optical film piece,
In the third and fourth area sensor cameras, the first and first optical cells in front of the conveyed optical cell with the third and fourth rollers sandwiching the rear portion of the optical cell and the second optical film piece. The system for manufacturing an optical display panel according to claim 13, wherein two corners are imaged.   The first image inspection unit calculates a distance based on a line in which the thickness of the film is maintained when the cut end surface of the first optical film piece is inclined. The manufacturing system of the optical display panel of any one of Claims 1. The said 2nd image test | inspection part calculates distance on the basis of the line by which the thickness of the film was maintained, when the cut end surface of the said 2nd optical film piece inclines. Optical display panel manufacturing system.