WO2014109198A1

WO2014109198A1 - Apparatus for manufacturing optical display device, and system for producing optical display device

Info

Publication number: WO2014109198A1
Application number: PCT/JP2013/084033
Authority: WO
Inventors: 幹士藤井; 大充田中
Original assignee: 住友化学株式会社
Priority date: 2013-01-10
Filing date: 2013-12-19
Publication date: 2014-07-17
Also published as: TW201430444A; CN104854502A; CN104854502B; KR20150104560A; JPWO2014109198A1; TWI578060B; JP5828972B2; KR101993029B1

Abstract

This apparatus for manufacturing an optical display device is provided with: an image-capture device for capturing an image, containing the corner part (C1) of a substrate (P1) of an optical display component in planar view, of a laminated body obtained by affixing an optical member sheet to the surface of the substrate (P1), the optical member sheet being wider than the surface of the substrate (P1); a cutting device for cutting the optical member sheet into an optical member that is a portion facing a display region of the optical display component, and a surplus portion on the outer side of the optical member; and a control device for finding an approximate contour line that approximates the contour line in planar view of the substrate (P1) on the basis of the image, and controlling the cutting device so as to cut the optical member sheet on the basis of the approximate contour line. The control device: detects multiple points (D) that each lie on the two sides of the substrate (P1) that flank the corner part (C1) in the image of the substrate (P1) included in the image; calculates two approximate straight lines (L1, L2) corresponding to the two sides on the basis of the multiple points (D); sets an intersection point of the two approximate straight lines (L1, L2) as a hypothetical point (CX) corresponding to the corner part (C1); sets the hypothetical point (CX) for each of the plurality of corner parts (C1) of the substrate (P1); and acquires, as the approximate contour line, a diagram obtained by connecting the hypothetical points (CX) with line segments.

Description

Optical display device manufacturing apparatus and optical display device production system

The present invention relates to an optical display device manufacturing apparatus and an optical display device production system.
This application claims priority based on Japanese Patent Application No. 2013-002830 filed on January 10, 2013, the contents of which are incorporated herein by reference.

Conventionally, in a production system of an optical display device such as a liquid crystal display, a mother panel is formed by sandwiching and bonding a liquid crystal layer between two mother glasses, and then the mother panel is divided into a plurality of liquid crystal panels (optical display components). ) Is used (so-called multi-chamfering). The mother panel can be divided into a plurality of liquid crystal panels by, for example, imprinting a scribe line on the mother glass, then pressurizing and dividing along the scribe line (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 11-90900

In a liquid crystal panel, optical members such as a polarizing film, a retardation film, and a brightness enhancement film are formed on a sheet piece having a size including a surplus part that protrudes not only to the display area of the liquid crystal panel but also to the peripheral part (frame part) of the display area. It is pasted after being cut out. Thereby, the surplus part is arrange | positioned in a frame part, covering the display area reliably. Conventionally, the edges of the optical member are bonded so as to be arranged in the frame portion of the liquid crystal panel.

In recent years, however, optical display components have been studied to reduce the peripheral portion of the display area on the display surface to increase the display area and reduce the size of the device (hereinafter, the frame portion of the optical display component is reduced). This is sometimes referred to as “narrowing the frame”). The optical member is cut into a sheet piece having a size that matches the shape of the liquid crystal panel in plan view, and the edge of the sheet piece is bonded to the outer periphery of the liquid crystal panel.

Thus, when bonding the sheet piece of an optical member, the outer periphery shape of a liquid crystal panel is detected, and the operation which cuts out a sheet piece in the magnitude | size and shape match | combined with this outer periphery shape is performed. As a method for detecting the outer shape, it is conceivable to detect the four corners (corner portions) of the liquid crystal panel in a plan view and to make a rectangle connecting the four corners into the outer peripheral shape of the liquid crystal panel.

However, when the liquid crystal panel is manufactured by multi-chamfering by the above-described method, a burr or a chip is likely to occur at the corners in a liquid crystal panel having a rectangular shape. Therefore, in the case of a liquid crystal panel manufactured by multi-chamfering, when detecting the outer peripheral shape of the liquid crystal panel, it is affected by burrs and chips, and an outer shape that is larger or smaller than the actual outer peripheral shape of the liquid crystal panel is detected. A sheet piece of the optical member that matches the actual outer peripheral shape of the liquid crystal panel cannot be cut out, and a defective optical display device is likely to occur.

The aspect according to the present invention has been made in view of such circumstances, and detects the outer peripheral shape of the liquid crystal panel that is free from the influence of burrs and chips on the peripheral edge, and the optical member matched to the outer peripheral shape is detected. An object of the present invention is to provide an optical display device manufacturing apparatus that can be processed. It is another object of the present invention to provide an optical display device production system that has such a manufacturing apparatus and that can easily produce a narrow frame optical display device.

The present invention employs the following aspects in order to solve the above-described problems.
(1) An optical display device manufacturing apparatus according to one aspect of the present invention is an optical display device manufacturing apparatus in which an optical member is bonded to an optical display component, and the optical display device has a substrate surface of the optical display component. An imaging device that captures an image including a corner portion of the substrate in a plan view of a laminate in which an optical member sheet wider than the surface is bonded; a display that the optical display component includes the optical member sheet A cutting device for separating the optical member that is a portion facing the region and a surplus portion outside the optical member; an approximate contour line that approximates the contour line in plan view of the substrate is obtained based on the image And a control device that controls the cutting device so as to cut the optical member sheet based on the approximate contour line, and the control device uses the corner of the image of the substrate included in the image. A plurality of points overlapping each of the two sides of the substrate sandwiching the substrate, calculating two approximate lines corresponding to the two sides based on the plurality of points, and calculating the intersection of the two approximate lines as the angle A virtual point corresponding to a part is set, the virtual point is set for each of the plurality of corners of the substrate, and a figure obtained by connecting the virtual points with line segments is obtained as the approximate contour line.

In the present specification, the “part facing the display area” is an area that is not less than the size of the display area and not more than the size of the outer shape of the optical display component, and avoids a functional part such as an electrical component mounting portion. Indicates the area. That is, the optical member may be formed by being separated from the surplus portion along the outer peripheral edge of the optical display component, and is formed by being separated from the surplus portion at the frame portion that is the peripheral portion of the display area. It may be a thing.

Further, in the present specification, “cutting the optical member sheet based on the approximate contour line” means a region along the calculated approximate contour line or the size of the display region and inside the approximate contour line. The mode which cut | disconnects an optical member sheet | seat is shown. That is, the cutting position of the optical member sheet may be a position along the approximate contour line, or may be a position overlapping with a frame portion that is a peripheral portion of the display area.

(2) In the aspect of the above (1), an illumination device that illuminates the multilayer body from the side opposite to the imaging device across the multilayer body may be provided.

(3) In the above aspect (1) or (2), the control device detects the plurality of points overlapping each of the two sides of the substrate except for a predetermined region in the vicinity of the corner portion. May be.

(4) An optical display device production system according to an aspect of the present invention is an optical display device production system in which an optical member is bonded to an optical display component, and the optical display component is conveyed on a line. An optical member sheet wider than the surface is bonded to the surface of the sheet to form a laminate including the optical display component and the optical member sheet; and the optical member sheet included in the laminate. (1) to (3) any one optical display device manufacturing apparatus to be cut.

According to the aspect of the present invention, an apparatus for manufacturing an optical display device that detects the outer peripheral shape of a liquid crystal panel that has been freed from the influence of burrs and chips at the peripheral edge and can process an optical member in accordance with the outer peripheral shape. Can be provided. Further, it is possible to provide an optical display device production system that has such a manufacturing apparatus and that can easily produce a narrow frame optical display device.

It is a schematic sectional drawing which shows the production system of an optical display device. It is a schematic diagram which shows an optical member sheet | seat. It is a schematic diagram which shows a mode that a laminated body is imaged using an imaging device. It is a schematic diagram which shows a mode that a laminated body is imaged using an imaging device. It is a schematic diagram of the image imaged with the imaging device. It is a graph which shows the approximate straight line calculated | required from several points on an outline. It is the figure which reflected the calculated | required virtual point on the image imaged with the imaging device. It is a schematic diagram which shows the process of calculating | requiring an approximate outline. It is a schematic diagram which shows the process of calculating | requiring an approximate outline. It is a schematic diagram which shows the process of calculating | requiring an approximate outline. It is a schematic diagram which shows a mode that the sheet piece of a laminated body is cut | disconnected using a cutting device.

Hereinafter, an optical display device manufacturing apparatus and an optical display device production system according to this embodiment will be described with reference to FIGS.

FIG. 1 is a schematic sectional view showing an optical display device production system 100 (hereinafter, production system 100). The production system 100 cuts the sheet piece FA by bonding the sheet piece (optical member sheet) FA to the liquid crystal panel (optical display component) P conveyed on the line, and the optical member. F and a cutting part 20 for manufacturing an optical display device having the optical member F and the liquid crystal panel P. The cutting unit 20 corresponds to the optical display device manufacturing apparatus according to the present embodiment.

(Pasting part)
The bonding unit 10 includes a transport device 11 that transports the belt-shaped optical member sheet F1 in the longitudinal direction of the optical member sheet F1, a cutting device 12 that cuts out the sheet piece FA from the optical member sheet F1, and the sheet piece FA as a liquid crystal panel. And a bonding device 13 for bonding to the upper surface of P.

FIG. 2 is a schematic diagram showing the optical member sheet F1. As shown in FIG. 2, the optical member sheet F <b> 1 is a belt-shaped optical member original fabric F <b> 2 from which a sheet piece FA to be bonded to the liquid crystal panel P is obtained by cutting to a unit length, and an optical member original fabric F <b> 2. And a separator sheet F3 provided in a stacked manner. The separator sheet F3 is used as a carrier for conveying the optical member original fabric F2.

An adhesive layer F4 is provided between the optical member original fabric F2 and the separator sheet F3.
The optical member original fabric F2 is cut into a unit length (sheet piece FA unit) along a cut line C formed over the entire width in the width direction of the optical member sheet F1 together with the adhesive layer F4. Become. The sheet piece FA is peeled from the separator sheet F3 and bonded to the upper surface of the liquid crystal panel P as will be described later.

Returning to FIG. 1, the conveying device 11 holds the original roll R1 around which the belt-shaped optical member sheet F1 is wound, and also feeds the optical member sheet F1 along the longitudinal direction of the optical member sheet F1. And a winding unit 112 that holds the separator roll R2 that winds up the separator sheet F3 that has been separated from the sheet piece FA.

In addition, although illustration is abbreviate | omitted, the conveying apparatus 11 has a some guide roller which winds the optical member sheet | seat F1 along a predetermined | prescribed conveyance path | route. The optical member sheet F1 has a width that is wider than the substrate on the side on which the sheet pieces of the liquid crystal panel P are bonded in the horizontal direction (sheet width direction) orthogonal to the conveying direction of the optical member sheet F1.

The unwinding unit 111 and the winding unit 112 are driven in synchronization with each other, for example. Thereby, the operation of the unwinding unit 111 that feeds the optical member sheet F1 in the transport direction and the operation of the winding unit 112 that winds up the separator sheet F3 are synchronized, and the slack of the optical member sheet F1 and the separator sheet F3 is suppressed. To do. The unwinding unit 111 and the winding unit 112 convey the optical member sheet F1 unwound from the original fabric roll R1 toward the cutting device 12 side with the optical member original fabric F2 side facing.

The cutting device 12 is disposed facing the optical member original fabric F2 in the process of conveying the optical member sheet F1. The cutting device 12 includes, for example, a circular cutting blade, and is configured to be movable in the set cutting direction of the optical member sheet F1.

The cutting device 12 cuts the optical member original fabric F2 included in the optical member sheet F1 over the entire width in the sheet width direction of the optical member sheet F1 every time the optical member sheet F1 is fed out by a preset unit length. . A cut line C is formed in the cut optical member sheet F1 over the entire width of the optical member original fabric F2 in the sheet width direction. The range defined by the cut line C is the sheet piece FA, and the cutting device 12 forms the sheet piece FA on the separator sheet F3.

In the following description, not cutting all of the thickness direction of the optical member sheet F1, but cutting the optical member original fabric F2 in a state where at least a part of the separator sheet F3 is connected is referred to as “half cut”. Sometimes called.

In order to prevent the optical member sheet F1 (separator sheet F3) from being broken by the tension acting during the conveyance of the optical member sheet F1, the cutting device 12 advances and retracts the cutting blade so that a predetermined thickness remains on the separator sheet F3. And half-cut to the vicinity of the interface between the adhesive layer F4 and the separator sheet F3. In addition, you may burn out using the apparatus which inject | emits a laser beam instead of a cutting blade.

The size and shape of the sheet piece FA formed by the cutting device 12 can be arbitrarily set according to the shape of the optical member, the setting direction of the optical axis in the optical member, and the like. In the present embodiment, the optical member sheet F1 is half-cut in a direction intersecting with the longitudinal direction of the optical member sheet F1, and a cut line C is formed in the optical member sheet F1 with a predetermined interval, thereby forming a sheet piece FA. Have gained.

The laminating apparatus 13 winds the optical member sheet F1 at an acute angle and separates the sheet piece FA from the separator sheet F3, holds the sheet piece FA, and transports and pastes it onto the liquid crystal panel P. It has the bonding head 132 to combine, and the mounting base 133 by which liquid crystal panel P is mounted and the liquid crystal panel P and sheet piece FA are bonded.

The peeling portion 131 is positioned below the optical member sheet F1 that is conveyed substantially horizontally with the separator sheet F3 side downward in FIG. 1, and extends at least over the entire width of the optical member sheet F1 in the sheet width direction. . An optical member sheet F1 after half cut is wound around the peeling portion 131 so that the separator sheet F3 side is in contact therewith.

The tip 131a of the peeling part 131 is formed at an acute angle in a sectional view. When the optical member sheet F1 is folded at an acute angle at the distal end portion 131a of the peeling portion 131, the sheet piece FA is turned up and peeled from the separator sheet F3 starting from the cut line C formed by the above-described half cut. When the sheet piece FA is peeled off, the adhesive layer F4 formed between the sheet piece FA and the separator sheet F3 is peeled off from the separator sheet F3 together with the sheet piece FA. Therefore, in the sheet piece FA that peels from the separator sheet F3, the adhesive layer F4 is disposed on the lower surface.

The pasting head 132 has an arc-shaped holding surface 132a that is parallel to the sheet width direction and convex downward. The holding surface 132a has, for example, a weaker adhesion force than the adhesive layer F4 of the sheet piece FA, and can repeatedly perform the adhesion and peeling of the sheet piece FA.

Further, the bonding head 132 has a driving device (not shown), can move up and down by a predetermined amount above the peeling portion 131 (tip portion 131a) and above a mounting table 133 described later, and is mounted on the peeling portion 131. It can be appropriately moved between the table 133. Furthermore, the bonding head 132 can be translated (rotated) in both the forward and reverse directions around the normal line of the placement surface for horizontal position correction.

The pasting head 132 is configured to be tiltable along the curvature of the holding surface 132a around the axis along the sheet width direction of the optical member sheet F1. Tilt of the bonding head 132 is appropriately performed when the sheet piece FA is bonded and held, and when the bonded sheet piece FA is bonded to the liquid crystal panel P.

The mounting table 133 mounts the liquid crystal panel P, and can be translated and rotated for horizontal position correction.

Further, the bonding unit 10 is disposed below the leading end of the peeling unit 131, and the first detection camera 141 that detects the leading end of the sheet piece FA on the downstream side of the sheet conveyance and the sheet that is stuck and held on the holding surface 132a. It has the 2nd detection camera 142 which images piece FA, and the 3rd detection camera 143 which images the liquid crystal panel P on the mounting base 133. It is also possible to use sensors in place of the detection cameras 141 to 143.

Such a bonding part 10 is driven as follows as a whole.
When the optical member sheet F1 is fed out, for example, when the first detection camera 141 detects the downstream end of the sheet piece FA, the transport device 11 temporarily stops, and the cutting device 12 half-cuts the optical member sheet F1. That is, the distance along the sheet conveyance path between the detection position by the first detection camera 141 (the optical axis extension position of the first detection camera 141) and the cutting position by the cutting device 12 (the cutting blade advance / retreat position of the cutting device 12) is This corresponds to the length of the sheet piece FA.

The cutting device 12 is movable along the sheet conveyance path, and the distance along the sheet conveyance path between the detection position by the first detection camera 141 and the cutting position by the cutting device 12 can be changed. it can. For example, when the length of the created sheet piece FA is different from the preset standard of the sheet piece FA, the deviation is corrected by the movement of the cutting device 12, and the sheet piece FA having a predetermined length is formed. can do. Further, the sheet pieces FA having different lengths can be formed by the movement of the cutting device 12.

At the same time, the bonding head 132 is tilted so that the curved one end 132x of the holding surface 132a is on the lower side (inclined to the right in FIG. 1; indicated by the symbol α). The curved one end side 132x of the holding surface 132a is pressed from above, and the downstream end of the sheet piece FA at the leading end 131a is adhered to the holding surface 132a. Thereafter, the connection between the bonding head 132 and the driving device is cut off so that the bonding head 132 can be tilted.

When the unwinding unit 111 and the winding unit 112 are driven in this state and the sheet piece FA is unwound, the bonding head 132 is arranged such that the curved other end side 132y of the holding surface 132a is on the lower side (in FIG. 1). Tilt to the left (indicated by the symbol β) and tilt passively. Thereby, the whole sheet piece FA is stuck on the holding surface 132a.

The laminating head 132 holding the sheet piece FA moves above the mounting table 133. At that time, the sheet piece FA held by the bonding head 132 is imaged by the second detection camera 142 when moving from above the peeling unit 131 to above the mounting table 133. The captured image data is sent to a control device (not shown), and the holding posture of the sheet piece FA on the holding surface 132a of the bonding head 132 (the position in the horizontal direction, the rotation angle around the normal line of the holding surface 132a). Detected.

The liquid crystal panel P placed on the placing table 133 is imaged by the third detection camera 143.
The captured image data is sent to a control device (not shown), and the attitude of the liquid crystal panel P on the mounting table 133 (horizontal position, rotation around the normal of the upper surface of the mounting table on which the liquid crystal panel P is mounted) Angle) is detected.

The bonding head 132 and the mounting table 133 adjust the relative positions of the sheet piece FA and the liquid crystal panel P based on the detected position of the sheet piece FA and the liquid crystal panel P, respectively. In the mounting table 133, the bonding head 132 is actively tilted, for example, by the operation of a driving device, and a sheet piece is formed on the upper surface of the liquid crystal panel P mounted on the mounting table 133 along the curvature of the holding surface 132a. Press the FA and paste it securely.

Thereby, the laminate S in which the sheet piece FA and the liquid crystal panel P are bonded is formed. By bonding the liquid crystal panel P and the sheet piece FA, the relative positions of which are adjusted, the bonding variation of the sheet piece FA is suppressed, and the accuracy of the optical axis direction of the sheet piece FA with respect to the liquid crystal panel P is improved. The display device is enhanced in definition and contrast.

When the cutting device 12 half-cuts the optical member sheet F1, the first detection camera 141 may also detect a defect mark marked on the optical member original fabric F2 of the optical member sheet F1. The defect mark is provided by using an ink jet apparatus or the like on the optical member original fabric F2 at the defect location found in the optical member sheet F1 when the original fabric roll R1 is manufactured. The sheet piece FA in which the defect mark is detected is pasted on the pasting head 132, and is not pasted on the liquid crystal panel P, but is moved to a separately disposed pasting position and pasted on a waste material sheet or the like. In addition, when the defect mark is detected, the cutting device 12 may be moved, cut shorter than the sheet piece FA that can be bonded to the liquid crystal panel P, and the portion including the defect mark may be cut and discarded.

(Cutting part)
The cutting unit 20 includes an imaging device 210 that captures an image of the stacked body S, an optical member F that is a portion facing the display area of the liquid crystal panel P, the sheet piece FA included in the stacked body S, and the optical member F. A cutting device 220 that separates the excess portion FX on the outside and a control device 230 that controls the cutting device 220 based on an image captured by the imaging device 210 are provided. Furthermore, it has the illuminating device 240 which illuminates the laminated body S from the opposite side to the imaging device 210 on both sides of the laminated body S.

3A to 8 are explanatory diagrams for explaining the operation of the cutting unit 20. FIG.
3A and 3B are schematic diagrams illustrating a state in which the stacked body S is imaged using the imaging device 210. FIG. First, as shown in FIG. 3A, a plurality of (four in the figure) imaging devices 210 are used to image the periphery of the corners of the liquid crystal panel P in the stacked body S.

The laminate S has a liquid crystal panel P and a sheet piece FA bonded to the liquid crystal panel P.
The liquid crystal panel P has a liquid crystal layer sandwiched between the counter substrate P1 and the element substrate P2. Further, in the liquid crystal panel P, the counter substrate P1 has a smaller area in plan view than the element substrate P2, and one end side of the element substrate P2 is exposed in plan view when both are overlapped. A terminal portion P4 is provided in the exposed region P3 of the element substrate P2.

FIG. 3B is a partial plan view of the liquid crystal panel P. The liquid crystal panel P of this embodiment is manufactured by multi-chamfering. Therefore, as shown in FIG. 3B, burrs and chipping occur near the corners PA1 and PA2 of the counter substrate P1 (for example, corners C1 and C2 at both ends of the side PA) as compared to the central part PA3 of the side PA. It is not in shape. For example, in the case of a liquid crystal panel for a 4-inch display, the lengths of the vicinity PA1 and PA2 are about 5 mm empirically.

The sheet piece FA is bonded to the surface of the counter substrate P1. In the laminated body S shown in the drawing, the sheet piece FA has a rectangular shape in plan view, and has a larger plan view area than the counter substrate P1.

For such a laminate S, the imaging device 210 is used to image the imaging area AR including the corner of the counter substrate P1. At that time, using the illumination device 240 shown in FIG. Thereby, compared with the case where the laminated body S is illuminated from the same side as the imaging device 210, halation due to the reflected light generated in the sheet piece FA can be suppressed, and an image suitable for analysis described later can be captured.

The image data of the image captured by the imaging device 210 is input to the control device 230, and the next processing (image processing, calculation) is performed.

(First process)
First, as a first process, the outline of the counter substrate P1 when the liquid crystal panel P included in the stacked body S is viewed in plan from the counter substrate P1 side (below the counter substrate P1) shown in FIG. 3A is emphasized on the image data. Perform the process.

For example, when the stacked body S is viewed in plan, an area where the counter substrate P1 and the sheet piece FA overlap (first area), and an area only of the sheet piece FA that protrudes from the counter substrate P1 (second area). Since the light transmittance is different in, the second region is brighter than the first region in the captured image. Therefore, when the captured image is binarized, the first region becomes a bright region (white), the second region becomes a dark region (black), and the outline of the counter substrate P1 becomes clear as a light / dark boundary.

Note that the threshold value of the gradation value at the time of binarization differs depending on the type of the sheet piece FA to be bonded, the structure of the liquid crystal panel P at the position to be imaged, etc. To set.

(Second process)
FIG. 4 is a schematic diagram of an image captured by the imaging device 210A in FIG. 3A. In FIG. 4, the first area is indicated by a symbol AR1, and the second area is indicated by a symbol AR2. As the second process, as shown in FIG. 4, based on the image data binarized in the first image process (hereinafter referred to as binarized data), it overlaps with the outline (side) of the counter substrate P1. The coordinates of a plurality of points D are detected.

As the coordinate axes of the coordinates to be detected, for example, an X axis with the upper left corner of the binarized data as the origin, an X axis with the right direction of the image as the + direction, and a Y axis with the down direction of the image as the + direction is set. In addition, in the image captured by the imaging device 210, when two sides (contour lines) sandwiching the corner of the counter substrate P1 are not substantially parallel to the outer peripheral side of the image to be captured, image data is appropriately selected. A process (trimming process) for cutting out an arbitrary area suitable for analysis from (or binarized data) may be performed, and the second process may be performed on the processed image.

When detecting the coordinates of the point D, for example, when the gradation is detected in the + Y direction from the upper end at an arbitrary position (x1) in the X-axis direction of the image based on the binarized data, the white (first The coordinates (x1, y1) of the point D can be obtained from the position (y1) in the Y direction of the position changing from black (second area) to black (second area). A similar process is performed on each of two sides sandwiching the corner portion C1 of the counter substrate P1, and the coordinates of a plurality of points that overlap the side are detected on each side.

It should be noted that the number of points D to be detected is preferably large, but it is preferable to set the number so that the processing load of the arithmetic processing described later does not become excessive. For example, 100 points D may be detected on each of the two sides.

In the vicinity PA1 shown in the drawing, the counter substrate P1 is burred or chipped, and each side is not linear. Therefore, when the point D is detected, the vicinity PA1 (a predetermined range as the vicinity of the corner) is selected. ) Should not be included in the detection range. The range of the neighborhood PA1 to be excluded from the detection range can be appropriately set according to a value obtained empirically or experimentally.

(Third process)
As a third process, a straight line corresponding to the side overlapping the point D is approximated from the coordinates of the plurality of points D detected in the second process. As the approximation, a generally known statistical method can be used. For example, an approximation method for obtaining a regression line (approximate line) using the least square method can be given.

FIG. 5 is a graph showing the approximate straight line L1 obtained in the third process, and shows the approximate straight line L1 as Y = 0.

Here, in the figure, the point D1 plotted on the + y side and the point D2 plotted on the -y side have a larger separation distance from the approximate line L1 than the other points D, and the calculation result of the approximate line L1 It is thought that it has had a big influence on. In such a case, the approximate straight line may be obtained again using the remaining points excluding the points D1 and D2.

Further, the points D to be excluded are not necessarily two as shown in FIG. A threshold is determined for the distance between the approximate line L1 and the point D (the absolute value of the Y coordinate with respect to the point D in FIG. 5), and the point D whose absolute value of the Y coordinate is larger than the threshold is excluded to obtain the approximate line again. It doesn't matter. About a threshold value, it can set suitably according to the value calculated | required empirically or experimentally.

The approximate straight line obtained in this way is performed for two sides included in the captured image, and is further performed for each image captured by the four imaging devices 210.

(Fourth process)
As a fourth process, intersections of approximate lines obtained for two sides included in one image are obtained as coordinates of virtual points corresponding to corners of the counter substrate P1 sandwiched between the two sides.

FIG. 6 is a diagram in which the virtual point CX obtained as the intersection of the two approximate straight lines L1 and L2 obtained in the fourth process is reflected in the image taken by the imaging device 210. Since the coordinates of each point D used to obtain the approximate lines L1 and L2 are known, the approximate lines L1 and L2 and the virtual point CX can be reflected on the image captured by the imaging device 210.

(Fifth process)
As a fifth process, it is assumed that a figure obtained by connecting the virtual points CX using the virtual points CX obtained in each of the images captured by the four imaging devices 210 is the contour line (approximate contour line) of the counter substrate P1. And ask.

7A to 7C are schematic diagrams showing a process of obtaining the approximate contour OL. Since the relative actual positions of the four imaging devices 210 are known, the relative positions of the imaging regions AR of the four imaging devices 210 are also known. Therefore, four virtual points when images (FIG. 7A) obtained by imaging the imaging area AR with the four imaging devices 210 in FIG. 3A are arranged in one common coordinate system (real (actual) coordinate system). The coordinates of CX can also be calculated, and the coordinates at which the virtual point CX is located when the stacked body S is viewed in plan can be obtained (FIG. 7B). The approximate contour OL can be obtained by connecting the four virtual points CX obtained in this way (FIG. 7C).

FIG. 8 is a schematic diagram showing how the sheet piece FA of the laminate S is cut using the cutting device 220. As the cutting device 220, a device that emits laser light LB can be used. The control device 230 controls the cutting device 220, emits the laser beam LB based on the approximate contour OL obtained as described above, cuts the sheet piece FA, and separates the optical member F and the surplus portion FX. .

Thus, the sheet piece FA can be cut substantially along the edge of the counter substrate P1, and the optical member F can be suitably bonded to the narrowed liquid crystal panel P. Furthermore, if necessary, an optical display device in which a plurality of types of optical members are bonded to the liquid crystal panel P using the above-described apparatus and the optical members are bonded to the liquid crystal panel P can be obtained.

According to the optical display device manufacturing apparatus having the above-described configuration, it is possible to detect the outer peripheral shape of the liquid crystal panel without the influence of burrs and chips on the peripheral portion, and to process the optical member according to the outer peripheral shape. Become.

Also, according to the optical display device production system configured as described above, it is possible to easily produce a narrow frame optical display device.

In the present embodiment, the sheet piece FA is cut along the approximate contour line OL. However, the present invention is not limited to this, and is, for example, a region inside the approximate contour OL and the frame of the liquid crystal panel P. The sheet piece FA may be cut at a position overlapping the portion. In that case, the control device 230 calculates a shape that is smaller than the shape drawn by the approximate contour as a true cut portion based on the calculated approximate contour, and then calculates the true cut portion. The cutting device 220 may be controlled so as to cut the sheet piece FA along.

The shape showing the true cut portion may be a similar shape obtained by reducing the shape drawn by the approximate contour OL at a predetermined scale, and only a predetermined width from the shape drawn by the approximate contour OL. The shape shrunk inward may be sufficient.

Further, in the present embodiment, after obtaining an approximate line using a plurality of points D, excluding those that are further than the threshold based on the distance between the approximate line and each point D, the approximate line is obtained again. However, it is not limited to this. For example, before obtaining an approximate line, points that do not satisfy a predetermined criterion among points D may be excluded, and an approximate line may be obtained using the remaining points D.

Further, in the present embodiment, the liquid crystal panel P included in the stacked body S is illustrated and described as using the imaging device 210 as a plan view from the counter substrate P1 side, but the present invention is not limited thereto. .

When the liquid crystal panel P is formed by multi-chamfering, the position of the end portion may be shifted between the upper and lower substrates constituting the liquid crystal panel P. When the liquid crystal panel P shown in FIG. 3A has such a shift and the edge of the element substrate P2 farther from the imaging device 210 than the edge of the counter substrate P1 close to the imaging device 210 is disposed outside, the imaging is performed. When an image viewed in plan using the apparatus 210 is taken, the edge of the element substrate P2 is mistaken as the edge of the counter substrate P1, and it is difficult to obtain an approximate contour line along the contour line of the counter substrate P1.

In such a case, the imaging device 210 may be inclined to the inside of the counter substrate P1 with respect to the normal line of the counter substrate P1, and an image of a corner portion of the counter substrate P1 may be captured from the inside of the counter substrate P1. When imaging is performed in this manner, the corner of the element substrate P2 is captured in a state where it is hidden behind the corner of the counter substrate P1, so that the counter substrate P1 is not mistaken for the edge of the element substrate P2 as the edge of the counter substrate P1. It is possible to reliably capture the image.

The inclination angle of the imaging device 210 may be changed each time according to the amount of deviation between the counter substrate P1 and the element substrate P2 in each liquid crystal panel P. Further, when the maximum value of the deviation amount is empirically known, an inclination angle that can hide the corner portion of the element substrate P2 in the corner portion of the counter substrate P1 even if the maximum deviation occurs is obtained and obtained. The imaging device 210 may be imaged by tilting the image by the tilt angle.

As described above, the preferred embodiments according to the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to such examples. Various shapes, combinations, and the like of the constituent members shown in the above-described examples are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 13 ... Pasting apparatus, 20 ... Cutting | disconnection part (manufacturing apparatus of an optical display device), 100 ... Production system of an optical display device, 210 ... Imaging apparatus, 220 ... Cutting apparatus, 230 ... Control apparatus, 240 ... Illuminating device, C1 ... Corner, CX ... virtual point, D, D1, D2 ... point, F ... optical member, F1 ... optical member sheet, FX ... excess part, L ... light, OL ... approximate contour line, P ... liquid crystal panel (optical display component) ), S ... Laminate

Claims

An optical display device manufacturing apparatus comprising an optical member bonded to an optical display component,
An imaging device that captures an image including a corner portion of the substrate in a plan view of a laminated body in which an optical member sheet wider than the surface is bonded to the surface of the substrate included in the optical display component;
A cutting device that separates the optical member sheet into the optical member that is a portion facing the display area of the optical display component, and a surplus portion outside the optical member;
A control device that obtains an approximate contour line that approximates a contour line in plan view of the substrate based on the image and controls the cutting device to cut the optical member sheet based on the approximate contour line; Prepared,
The control device includes:
For the image of the substrate included in the image, detect a plurality of points overlapping each of the two sides of the substrate sandwiching the corner,
Calculating two approximate lines corresponding to the two sides based on the plurality of points;
Set the intersection of the two approximate lines as a virtual point corresponding to the corner,
Setting the virtual point for each of the plurality of corners of the substrate;
An apparatus for manufacturing an optical display device, wherein a figure obtained by connecting the virtual points with line segments is obtained as the approximate contour line.
The apparatus for manufacturing an optical display device according to claim 1, further comprising: an illumination device that illuminates the multilayer body from a side opposite to the imaging device with the multilayer body interposed therebetween.
The apparatus for manufacturing an optical display device according to claim 1, wherein the control device detects the plurality of points overlapping each of the two sides of the substrate except for a predetermined region in the vicinity of the corner.
An optical display device production system in which an optical member is bonded to an optical display component,
A bonding apparatus for bonding a surface of the optical display component conveyed on the line to an optical member sheet wider than the surface to form a laminate having the optical display component and the optical member sheet;
An optical display device production system comprising: the optical display device manufacturing apparatus according to any one of claims 1 to 3, wherein the optical member sheet included in the laminate is cut.