KR20150068951A - Detection apparatus, method for manufacturing optical member-bonded body, and method for manufacturing optical member-bonded body - Google Patents

Abstract

The detecting device 41 is constituted of a sheet pile joining body PA1 constituted by joining sheet pieces F1m having a size protruding to the outside of the optical display parts P1 and P2 to the optical display parts P1 and P2, An illumination light source 44 for illuminating an end edge portion ED of a joint surface SA1 of the optical display parts P1 and P2 and the sheet piece F1m on the side of the sheet piece F1m, And an image pickup device 43 which is disposed in an inner space of the edge ED and captures an image of the edge portion ED.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection device, an apparatus for manufacturing an optical member joined body, and a method for manufacturing an optical member bonded body,

The present invention relates to a detection device, an apparatus for manufacturing an optical member joined body, and a method for manufacturing an optical member bonded body.

The present application claims priority based on Japanese Patent Application No. 2012-227074 filed on October 12, 2012, the contents of which are incorporated herein by reference.

Conventionally, in an optical display device production system such as a liquid crystal display, an optical member such as a polarizing plate bonded to a liquid crystal panel (optical display component) is cut out from a long film into a sheet piece sized to fit the display area of the liquid crystal panel, And is bonded to a liquid crystal panel (see, for example, Patent Document 1).

However, in this method, a work of packing or unwrapping the sheet pieces occurs, and defective products are generated along with these operations. Therefore, in order to solve such a problem, a method described in Patent Document 2 has been proposed. In the method of Patent Document 2, after a long film corresponding to the long side or the short side of the liquid crystal panel is unwound from the far end roll and the long film is bonded to the liquid crystal panel, the length of the short side or long side .

Japanese Patent Application Laid-Open No. 2003-255132 Japanese Patent No. 4628488

The liquid crystal panel is formed by joining two substrates with a liquid crystal layer interposed therebetween. As a manufacturing method of a liquid crystal panel, a method of manufacturing a liquid crystal panel by dividing a mother panel engraved with a scribe line is known. The mother panel is obtained by joining two mother substrates having a size of plural liquid crystal panels with a liquid crystal layer interposed therebetween. A scribe line is formed on each of the two mother boards, and two mother boards are sequentially divided along the scribe line. In this case, the edge of the edge of the liquid crystal panel at the time of panel division or the edge position of the edge between the upper and lower substrates (deviation of the division position) may occur.

When the film is bonded to the liquid crystal panel using the method of Patent Document 2, the end edge of the joining face of the liquid crystal panel is detected beyond the film and the film is cut along the edge of the joining face. In this case, if there is a deviation of the edge position of the end edge between the burrs and the upper and lower substrates on the end face of the liquid crystal panel, when the contact face is viewed beyond the film, the burr and the lower substrate (the substrate opposite to the bonding side) The edges are visually recognized as one body together with the joint surfaces, so that the end edges of the original joint surfaces may not be recognized. Accordingly, there has been a demand for a means for detecting only the bonding surface with high precision, excluding the influence of deviation of the edge position of the edge between the burrs and the upper and lower substrates when the bonding surface is detected beyond the film.

An object of the present invention is to provide a detection device and an apparatus for manufacturing an optical member joined body which can detect the edge portion of the end surface of the bonding surface with high accuracy.

Means for Solving the Problems In order to achieve the above object, a detection apparatus and an apparatus for manufacturing an optical member joined body according to an aspect of the present invention employ the following constitutions.

(1) A detection device according to an aspect of the present invention is a detection device of a sheet-joined assembly which is formed by joining sheet pieces having a size projected to the outside of the optical display component to an optical display component, A detecting device for detecting an end edge of a joining surface of a sheet member, the detecting device comprising: an illumination light source for illuminating the edge portion; and a detecting device disposed at a position inclined to the inside of the joining surface with respect to a normal direction of the joining surface, And an image pickup device for picking up an image of the end edge on the side where the sheet piece is joined to the sheet singly bonded body.

(2) In the detecting device according to (1), the illuminating light source may be disposed on the side opposite to the side where the sheet piece is joined to the sheet singulation conjugate.

(3) In the detection device according to (2), the illumination light source may be arranged at a position inclined to the outside of the abutment surface with respect to the normal direction of the abutting surface, with respect to the end edge.

(4) In the detection device according to any one of (1) to (3), the illumination light source and the imaging device are respectively disposed at positions corresponding to the four corner portions of the junction surface having a rectangular shape There may be.

(5) In the detecting device according to any one of (1) to (4), the optical display component may be formed by bonding two substrates.

(6) An apparatus for manufacturing an optical member joined body according to another aspect of the present invention is an apparatus for manufacturing an optical member joined body formed by bonding an optical member to an optical display component, (1) to (5) for detecting an end edge of a joint surface of the optical display part and the sheet piece of the sheet joining body, wherein the sheet joining body is formed by joining a sheet piece having a protruding size And cutting the sheet piece at a portion outwardly projected from the joining surface from the sheet knitting ceramics body by laser cutting along the edge portion so as to correspond to the joining surface And a cutting device for forming the optical member having a size that is smaller than the size of the optical member.

According to the aspect of the present invention, it is possible to detect the end edge of the bonding surface with high accuracy.

1 is a schematic diagram showing an apparatus for manufacturing an optical member joined body according to an embodiment of the present invention.
2 is a plan view of the liquid crystal panel.
3 is a sectional view taken along the line AA in Fig.
4 is a sectional view of the optical sheet.
5 is a view showing the operation of the cutting apparatus.
6 is a plan view showing an end edge detection step of the joint surface.
7 is a schematic diagram of the detection device.
8A is a diagram showing an example of a method of determining the position of the sheet pieces to be joined to the liquid crystal panel.
8B is a view showing an example of a method of determining the joining position of the sheet pieces with respect to the liquid crystal panel.
Fig. 9 is a perspective view for explaining the operation of the detection device according to the comparative example. Fig.
10 is a cross-sectional view for explaining the operation of the detection device according to the comparative example.
11 is a perspective view for explaining the operation of the detecting device according to the embodiment of the present invention.
12 is a cross-sectional view for explaining the operation of the detection device according to the embodiment of the present invention.
Fig. 13 is a cross-sectional view for explaining the operation of the detection device according to the embodiment of the present invention when a modified example of the sheet singulation conjugate is applied. Fig.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments.

In all of the following drawings, dimensions, ratios, and the like of the respective components are appropriately different in order to make the drawings easy to see. In the following description and drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

In the following description, the XYZ orthogonal coordinate system is set as necessary, and the positional relationship of the respective members is described with reference to this XYZ orthogonal coordinate system. In the present embodiment, the direction in which the liquid crystal panel serving as an optical display component is moved in the X direction and the direction orthogonal to the X direction (the width direction of the liquid crystal panel) in the plane of the liquid crystal panel is the Y direction, the X direction and the Y direction Direction is a Z-direction.

Hereinafter, a film joining system 1 which is an apparatus for manufacturing an optical member joined body according to an embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a diagram showing a schematic configuration of the film bonding system 1 of the present embodiment.

The film joining system 1 joins an optical member on a film, such as a polarizing film, an antireflection film, or a light diffusion film, to an optical display component on a panel such as a liquid crystal panel or an organic EL panel.

As shown in Fig. 1, the film bonding system 1 of the present embodiment is provided as one step of a production line of a liquid crystal panel P. Fig. The respective parts of the film bonding system 1 are collectively controlled by the control unit 40 as an electronic control unit.

2 is a plan view of the liquid crystal panel P viewed from the thickness direction of the liquid crystal layer P3. The liquid crystal panel P includes a first substrate P1 having a rectangular shape in plan view, a second substrate P2 having a relatively small rectangular shape disposed to face the first substrate P1, And a liquid crystal layer P3 sealed between the substrate P1 and the second substrate P2. The liquid crystal panel P has a rectangular shape along the outer shape of the first substrate P1 in plan view. In the liquid crystal panel P, a region accommodated inside the outer periphery of the liquid crystal layer P3 in plan view is the display region P4.

3 is a cross-sectional view taken along line A-A in Fig. The first and second optical sheets F1 and F2 (see FIG. 1, hereinafter collectively referred to as an optical sheet FX) may be collectively formed on the front and back surfaces of the liquid crystal panel P, The first optical member F11 and the second optical member F12 (hereinafter, sometimes collectively referred to as the optical member F1X) are properly bonded. In this embodiment, a first optical member F11 and a second optical member F12 as polarizing films are bonded to both the backlight side and the display surface side of the liquid crystal panel P, respectively.

Outside the display region P4 is provided a frame portion G having a predetermined width for disposing a sealing agent for bonding the first substrate P1 and the second substrate P2 of the liquid crystal panel P. [

The first optical member F11 and the second optical member F12 may be collectively referred to as a first sheet piece F1m and a second sheet piece F2m ) Of the liquid crystal panel P and the sheet piece FXm, respectively. The bonding surfaces will be described later.

The liquid crystal panel P according to the present embodiment is manufactured by a method in which a mother panel engraved with a scribe line is divided to fabricate a liquid crystal panel. The mother panel is obtained by joining two mother substrates having a size of plural liquid crystal panels with a liquid crystal layer interposed therebetween. A scribe line is formed on each of the two mother boards, and two mother boards are sequentially divided along the scribe line. In this case, there is a case where the edge of the end edge between the upper and lower substrates (deviation of the division position) occurs at the end face of the liquid crystal panel at the time of panel division.

The burrs at the time of substrate misalignment or panel division will be described later.

Fig. 4 is a partial cross-sectional view of the optical sheet FX bonded to the liquid crystal panel P. Fig. The optical sheet FX includes an optical member main body F1a on the film and an adhesive layer F2a formed on one side (upper side in Fig. 4) of the optical member main body F1a and an adhesive layer F2b A separator F3a detachably laminated on one surface of the main body F1a and a surface protective film F4a laminated on the other surface of the optical member main body F1a (bottom surface in Fig. 4). The optical member main body F1a functions as a polarizing plate and is bonded over the whole area of the display area P4 of the liquid crystal panel P and the peripheral area of the display area P4. Incidentally, hatching of each layer in Fig. 4 is omitted for convenience of illustration.

The optical member main body F1a is bonded to the liquid crystal panel P via the adhesive layer F2a while leaving the adhesive layer F2a on one side of the optical member main body F1a while separating the separator F3a, do. Hereinafter, the portion excluding the separator F3a from the optical sheet FX may be referred to as a bonded sheet F5.

The separator F3a protects the adhesive layer F2a and the optical member main body F1a until the separator F3a separates from the adhesive layer F2a. The surface protective film F4a is bonded to the liquid crystal panel P together with the optical member main body F1a. The surface protective film F4a is disposed on the side opposite to the liquid crystal panel P with respect to the optical member main body F1a to protect the optical member main body F1a. The surface protective film F4a is separated from the optical member main body F1a at a predetermined timing. The optical sheet FX may be configured so as not to include the surface protective film F4a or may be configured such that the surface protective film F4a is not separated from the optical member main body F1a.

The optical member main body F1a includes a sheet polarizer F6 and a first film F7 bonded to one side of the polarizer F6 with an adhesive or the like and a second film F6 bonded to the other side of the polarizer F6 with an adhesive, And a second film F8. The first film F7 and the second film F8 are, for example, protective films for protecting the polarizer F6.

Further, the optical member main body F1a may be a single-layer structure including one optical layer, or may be a multi-layer structure in which a plurality of optical layers are laminated to each other. The optical layer may be a retardation film, a brightness enhancement film, or the like in addition to the polarizer F6. At least one of the first film (F7) and the second film (F8) may be subjected to a surface treatment for obtaining effects such as hard coating treatment for protecting the outermost surface of the liquid crystal display element and anti-glare treatment including anti glare treatment have. The optical member main body F1a may not include at least one of the first film F7 and the second film F8. For example, when the first film F7 is omitted, the separator F3a may be bonded to one surface of the optical member main body F1a through the adhesive layer F2a.

Next, the film bonding system 1 of the present embodiment will be described in detail.

1, the film joining system 1 of the present embodiment is provided with a liquid crystal panel P on the left side in the drawing from the upstream side (+ X direction side) of the liquid crystal panel P on the right side in the drawing, And a drive roller conveyor 5 for conveying the liquid crystal panel P in a horizontal state on the downstream side (-X direction side) of the conveying direction of the liquid crystal panel P.

Hereinafter, the upstream side in the conveying direction of the liquid crystal panel P (or an optical member joined body to be described later) in the film joining system 1 may be referred to as the upstream side of the panel conveyance, and the downstream side in the conveying direction may be referred to as the downstream side of the panel conveyance.

The roller conveyor 5 is divided into an upstream conveyor 6 and a downstream conveyor 7 with a boundary of a reversing device 15 to be described later. In the upstream-side conveyor 6, the liquid crystal panel P is conveyed so that the shorter sides of the display area P4 are along the conveying direction. On the other hand, in the downstream conveyor 7, the liquid crystal panel P is conveyed such that the long sides of the display region P4 are along the conveying direction. The sheet piece FXm (corresponding to the optical member F1X) of the bonded sheet F5 cut out to a predetermined length is bonded to the front and back surfaces of the liquid crystal panel P by strip-shaped optical sheets FX.

The upstream conveyor 6 is provided with an independent free roller conveyor 24 on the downstream side in the first adsorption device 11 to be described later. On the other hand, the downstream conveyor 7 is provided with an independent free roller conveyor 24 on the downstream side in the second adsorption device 20 to be described later.

The film bonding system 1 of the present embodiment includes a first adsorption device 11, a first dust collector 12, a first bonding device 13, a first detection device 41, a first cutting device 31, A second detecting device 42, a second cutting device 32 and a control unit 40. The control unit 40 controls the operation of the first detecting unit 42, the second detecting unit 42,

The first adsorption device 11 adsorbs the liquid crystal panel P and conveys the liquid crystal panel P to the upstream conveyor 6 and aligns (positions) the liquid crystal panel P. The first adsorption device 11 has a panel holding portion 11a, an alignment camera 11b and a rail R. [

The panel holding portion 11a holds the liquid crystal panel P which is brought into contact with the stopper S on the downstream side by the upstream conveyor 6 so as to be movable in the vertical direction and the horizontal direction, Alignment is performed. The panel holding portion 11a adsorbs and holds the upper surface of the liquid crystal panel P that has come into contact with the stopper S by vacuum suction. The panel holding portion 11a moves on the rail R in a state in which the liquid crystal panel P is held by suction and conveys the liquid crystal panel P. [ The panel holding portion 11a releases suction holding when the conveyance is completed, and transfers the liquid crystal panel P to the free roller conveyor 24. [

The alignment camera 11b holds the liquid crystal panel P in contact with the stopper S by the panel holding portion 11a and picks up the alignment mark and the tip shape of the liquid crystal panel P in the raised state. The image pickup data by the alignment camera 11b is transmitted to the control section 40 and the panel holding section 11a is operated based on the image pickup data to move the liquid crystal panel P to the destination free roller conveyor 24, Alignment is performed. That is, the liquid crystal panel P is moved in the conveying direction of the free roller conveyor 24, in the direction orthogonal to the conveying direction, and in the turning direction about the vertical axis of the liquid crystal panel P, .

The liquid crystal panel P conveyed on the rail R by the panel holding portion 11a is conveyed to the nipping pressure roll 23 along with the sheet piece FXm in a state of being attracted to the adsorption pad 26 Is held.

The first dust collecting device 12 is provided on the upstream side of the panel conveying of the sandwiching press roll 23 which is the joining position of the first joining device 13. The first dust collector 12 performs static elimination and dust collection in order to remove the dust around the liquid crystal panel P before being introduced to the bonding position, particularly dust on the lower surface side.

The first joining device 13 is disposed downstream of the first adsorption device 11 on the panel conveyance side. The first joining apparatus 13 joins the joining sheet F5 (corresponding to the first sheet member F1m) cut to a predetermined size to the lower surface of the liquid crystal panel P introduced to the joining position.

The first joining apparatus 13 is provided with a conveying device 22 and a nip press roll 23.

The transporting device 22 transports the optical sheet FX along its longitudinal direction while drawing the optical sheet FX from the original roll R1 wound with the optical sheet FX. The transport apparatus 22 carries the bonded sheet F5 using the separator F3a as a carrier. The conveying device 22 has a roll holding portion 22a, a plurality of guide rollers 22b, a cutting device 22c, a knife edge 22d and a winding portion 22e.

The roll holding portion 22a holds the fabric roll R1 wound with the strip-shaped optical sheet FX and loosens the optical sheet FX along its longitudinal direction.

The plurality of guide rollers 22b wind the optical sheet FX to guide the optical sheet FX released from the far-end roll R1 along a predetermined conveyance path.

The cutting device 22c applies a half cut to the optical sheet FX on the conveying path.

The knife edge 22d is formed by winding a half cut optical sheet FX at an acute angle and separating the bonded sheet F5 from the separator F3a while separating the bonded sheet F5 separated from the separator F3a .

The winding section 22e holds a separator roll R2 for winding a separator F3a which is singly made via a knife edge 22d.

The roll holding portion 22a located at the time of the transport apparatus 22 and the winding portion 22e located at the end of the transport apparatus 22 are driven in synchronism with each other, for example. The winding section 22e winds the separator F3a through the knife edge 22d while the roll holding section 22a uncovers the optical sheet FX in the carrying direction of the optical sheet FX. Hereinafter, the upstream side of the optical sheet FX (separator F3a) in the conveying direction is referred to as the upstream side of the sheet conveyance direction, and the downstream side in the conveying direction is referred to as the sheet conveyance downstream side.

Each guide roller 22b changes the advancing direction of the optical sheet FX during conveyance along the conveying path and at least a part of the plurality of guide rollers 22b adjusts the tension of the optical sheet FX during conveyance .

A dancer roller (not shown) may be disposed between the roll holding portion 22a and the cutting device 22c. The dancer roller absorbs the amount of feeding of the optical sheet FX conveyed from the roll holding portion 22a while the optical sheet FX is cut by the cutting device 22c.

5 is a diagram showing the operation of the cutting device 22c of the present embodiment.

As shown in Fig. 5, the cutting device 22c cuts the optical sheet FX over the entire width in the width direction orthogonal to the longitudinal direction of the optical sheet FX when the optical sheet FX is unrolled by a predetermined length FX is cut in the thickness direction. The cutting device 22c of the present embodiment is provided so as to be capable of advancing and retreating from the opposite side of the optical sheet FX to the optical sheet FX from the side opposite to the separator F3a.

The cutting device 22c is arranged so that the optical sheet FX (the separator F3a) is not broken (the predetermined thickness remains in the separator F3a) by the tension acting during the conveyance of the optical sheet FX, And the half cut is performed to the vicinity of the interface between the adhesive layer F2 and the separator F3a. Alternatively, a laser device may be used instead of the cutting blade.

The optical member FX and the surface protective film F4a are cut in the half-cut optical sheet FX in the thickness direction of the optical sheet FX, A cutting line L1, and a cutting line L2 are formed. The cutting line L1 and the cutting line L2 are formed so as to be plurally arranged in the longitudinal direction of the strip-shaped optical sheet FX. For example, in the case of the joining step of conveying the liquid crystal panels P having the same size, the plurality of cut-out lines L1 and the cut-out lines L2 are formed at equal intervals in the longitudinal direction of the optical sheet FX. The optical sheet FX is divided into a plurality of sections in the longitudinal direction by a plurality of cut-out lines L1 and a cut-off line L2. The sections sandwiched between the pair of cut lines L1 and the cut lines L2 adjacent to each other in the longitudinal direction of the optical sheet FX are formed by one sheet piece FXm in the bonded sheet F5 do. The sheet piece FXm is a sheet piece of the optical sheet FX having a size which is projected to the outside of the liquid crystal panel P. [

Returning to Fig. 1, the knife edge 22d is disposed below the upstream conveyor 6 and extends at least over its entire width in the width direction of the optical sheet FX. The knife edge 22d winds the optical sheet FX after the half cut so as to slide on the side of the separator F3a of the optical sheet FX after the half cut.

The knife edge 22d has a first surface disposed in a lying position in a width direction of the optical sheet FX (width direction of the upstream conveyor 6) A second surface disposed at an acute angle with respect to the first surface when viewed from the width direction, and a tip end where the first surface and the second surface intersect.

In the first joining apparatus 13, the knife edge 22d winds the first optical sheet F1 at an acute angle to the tip end of the knife edge 22d. The first optical sheet F1 separates the sheet piece (first sheet piece F1m) of the bonded sheet F5 from the separator F3a when folded back at an acute angle at the tip end of the knife edge 22d. The leading end portion of the knife edge 22d is arranged close to the downstream side of the panel conveyance of the nip pressure roll 23. [ The first sheet flake F1m separated from the separator F3a by the knife edge 22d overlaps the lower surface of the liquid crystal panel P in a state of being adsorbed on the first adsorption device 11, The pair of joining rollers 23a. The first sheet piece F1m is a sheet piece of the first optical sheet F1 having a size which is projected outward to the outside of the liquid crystal panel P. [

On the other hand, the separator F3a separated from the bonding sheet F5 by the knife edge 22d faces the winding section 22e. The winding section 22e winds the separator F3a separated from the bonded sheet F5 and collects it.

The nip press roll 23 is a sheet conveying device in which the first sheet F1m separated from the first optical sheet F1 by the conveying device 22 is joined to the lower surface of the liquid crystal panel P conveyed by the upstream conveyor 6. [ do. Here, the nip press roll 23 corresponds to the joining apparatus described in the claims.

The nipping pressurizing roll 23 has a pair of joining rollers 23a and a joining roller 23a (the joining rollers 23a on the upper side are turned upside down) arranged in parallel with each other in the axial direction. A predetermined clearance is formed between the pair of joining rollers 23a and the joining rollers 23a, and this gap serves as a joining position of the first joining apparatus 13. [

The liquid crystal panel P and the first sheet piece Fl are superimposed and introduced into the gap. The liquid crystal panel P and the first sheet piece F1m are sent to the downstream side of the panel conveyance of the upstream conveyor 6 while being clamped and pressed by the respective joining rollers 23a. In the present embodiment, the first sheet member F1m is bonded to the backlight side surface of the liquid crystal panel P by the nip press roll 23, whereby the first optical member joined body PA1 is formed. Here, the first optical member joined body PA1 corresponds to the sheet bonding body described in the claims.

The first detecting device 41 is provided downstream of the first joining apparatus 13 on the panel conveying side. The first detecting device 41 detects the end edge (end edge portion) of the junction surface of the liquid crystal panel P and the first sheet piece F1m (hereinafter referred to as the first junction surface).

Fig. 6 is a plan view showing the step of detecting the end edge ED of the first joint surface SA1.

6, the first detection device 41 detects the position of the end edge of the first abutment surface SA1 in the four inspection areas CA formed on the conveying path of the upstream conveyor 6, for example, (ED). Each inspection area CA is disposed at a position corresponding to the four corner portions of the first joint surface SA1 having a rectangular shape. The end edge ED is detected for every liquid crystal panel P conveyed on the line. The data of the end edge ED detected by the first detecting device 41 is stored in a storage unit (not shown).

Further, the arrangement position of the inspection area CA is not limited to this. For example, each inspection area CA may be disposed at a position corresponding to a part of each side of the first abutment surface SA1 (for example, a central portion of each side).

Fig. 7 is a schematic diagram of the first detection device 41. Fig.

7, the side of the first optical member joined body PA1 on which the first sheet flakes F1m are joined is referred to as the upper side, and the structure of the first detecting device 41 is shown inverted upside down.

7, the first detecting device 41 includes an illuminating light source 44 for illuminating an end edge ED, and an illumination light source 44 for illuminating the end edge ED with respect to a normal direction of the first abutment surface SA1 An image pickup device (1) for picking up an image of the end edge (ED) from the side where the first sheet piece (F1m) of the first optical member joined body (PA1) is joined is disposed at an inclined position inward of the first abutment surface (SA1) (43).

In other words, the image pickup device 43 is disposed in the space on the side of the first sheet piece F1m on the inner side than the end edge ED, and picks up an image of the end edge ED.

The illumination light source 44 and the image pickup device 43 are arranged at four inspection regions CA (positions corresponding to the four corner portions of the first joint surface SA1) shown in Fig. 6, respectively.

The angle? Between the normal of the first abutment surface SA1 and the normal of the imaging surface 43a of the imaging device 43 (hereinafter referred to as the inclination angle? Of the imaging device 43) It is also possible to set such that deviation or burrs during panel separation are not introduced into the visual field. For example, when the end face of the second substrate P2 is outwardly shifted from the end face of the first substrate P1, the inclination angle &thetas; of the image pickup device 43 is within the imaging field of view The end edge of the second substrate P2 is set not to be drawn.

The inclination angle? Of the image pickup device 43 is set to a distance H (hereinafter referred to as a height H of the image pickup device 43) between the first abutment surface SA1 and the center of the image pickup surface 43a of the image pickup device 43 Or may be set to suit. For example, when the height H of the image pickup device 43 is not less than 50 mm and not more than 100 mm, the tilt angle? Of the image pickup device 43 may be set to an angle in a range of not less than 5 degrees and not more than 20 degrees. However, when the shift amount is known empirically, the height H of the image pickup device 43 and the tilt angle &thetas; of the image pickup device 43 can be obtained on the basis of the shift amount known empirically. In the present embodiment, the height H of the image pickup device 43 is 78 mm, and the tilt angle [theta] of the image pickup device 43 is set to 10 [deg.].

The illumination light source 44 and the image pickup device 43 are fixedly arranged in the respective inspection areas CA.

The illumination light source 44 and the image pickup device 43 may be arranged so as to be movable along the end edge ED of the first abutment surface SA1. In this case, only one illumination light source 44 and one imaging device 43 may be provided. This makes it possible to move the illumination light source 44 and the imaging device 43 to a position where the end edge ED of the first abutment surface SA1 can be easily imaged.

The illumination light source 44 is disposed on the side opposite to the side where the first sheet piece F1m of the first optical member joined body PA1 is joined. The illumination light source 44 is disposed at a position inclined outward beyond the first abutment surface SA1 with respect to the normal direction of the first abutment surface SA1 with respect to the end edge ED. In this embodiment, the optical axis of the illumination light source 44 and the normal line of the imaging surface 43a of the imaging device 43 are parallel.

Further, the illumination light source may be disposed on the side where the first sheet member F1m of the first optical member joined body PA1 is joined.

The normal line of the image pickup surface 43a of the image pickup device 43 and the optical axis of the illumination light source 44 may be slightly obliquely intersected.

The cut position of the first sheet piece F1m is adjusted based on the detection result of the end edge ED of the first contact surface SA1. The control section 40 (see Fig. 1) acquires the data of the end edge ED of the first joint surface SA1 stored in the storage section and the first optical member F11 is located outside the liquid crystal panel P (The outer side of the first abutting surface SA1) of the first sheet piece F1m. The first cutting device (31) cuts the first sheet piece (F1m) at the cut position determined by the controller (40).

Returning to Fig. 1, the first cutting device 31 is provided on the downstream side of the panel transporting side with respect to the first detecting device 41. The first cutting device 31 cuts the laser beam along the edge portion ED so that the portion of the first sheet member SA1 that is outwardly projected from the first optical member joined body PA1 to the outside of the first joining surface SA1, (The first optical member F11) having a size corresponding to the first joining face SA1 is formed by separating the first sheet member F1m (the excess portion of the first sheet member F1m). Here, the first cutting device 31 corresponds to the cutting device described in the claims.

Here, the " size corresponding to the first bonding surface SA1 " indicates the size of the outer shape of the first substrate P1. However, it includes an area that is equal to or larger than the size of the display area P4, that is equal to or smaller than the size of the outside shape of the liquid crystal panel P, and which avoids functional parts such as an electric component mounting part.

An excess portion of the first sheet piece F1m is separated from the first optical member joined body PA1 by the first cutting device 31 so that the first optical member F11 is provided on the backlight side surface of the liquid crystal panel P. [ The second optical member joined body PA2 is formed. The excess portion separated from the first sheet piece F1m is peeled off from the liquid crystal panel P by a peeling apparatus not shown.

The reversing device 15 reverses the second optical member joined body PA2 with the display surface side of the liquid crystal panel P as an upper surface so that the backlight side of the liquid crystal panel P is the upper surface, Alignment of the liquid crystal panel P with respect to the liquid crystal panel 17 is performed.

The reversing device (15) has an alignment function similar to that of the panel holding portion (11a) of the first adsorption device (11). The reversing device 15 is provided with an alignment camera 15c similar to the alignment camera 11b of the first adsorption device 11.

 The reversing device 15 detects the position of the second optical member joined body PA2 with respect to the second joining apparatus 17 based on the inspection data in the optical axis direction and the image pickup data of the alignment camera 15c stored in the control unit 40, In the component width direction and in the rotational direction. In this state, the second optical member joined body PA2 is introduced to the joining position of the second joining apparatus 17.

Since the second adsorption device 20 has the same configuration as that of the first adsorption device 11, the same parts are denoted by the same reference numerals. The second adsorption apparatus 20 adsorbs the second optical member conjugate body PA2 and conveys the second optical member conjugate body PA2 to the downstream conveyor 7 and aligns (positions) the second optical member conjugate body PA2. The second adsorption apparatus 20 has a panel holding section 11a, an alignment camera 11b and a rail R. [

The panel holding portion 11a holds the second optical member joined body PA2 which is in contact with the downstream stopper S by the downstream conveyor 7 movably in the vertical direction and the horizontal direction, Alignment of the member assembly PA2 is performed. The panel holding portion 11a adsorbs and holds the upper surface of the second optical member joined body PA2, which is in contact with the stopper S, by vacuum suction. The panel holding portion 11a moves on the rail R in a state in which the second optical member joined body PA2 is attracted and held to carry the second optical member joined body PA2. The panel holding portion 11a releases suction holding when the conveyance is completed, and transfers the second optical member joined body PA2 to the free roller conveyor 24.

The alignment camera 11b is configured such that the panel holding portion 11a holds the second optical member joined body PA2 in contact with the stopper S and holds the alignment mark and the tip of the second optical member joined body PA2 in the raised state, Shape, and the like. The image pickup data by the alignment camera 11b is transmitted to the control section 40 and the panel holding section 11a is operated based on the image pickup data so that the second optical member joined body (PA2) are aligned. That is, the second optical member joined body PA2 is provided with a deviation in the conveying direction with respect to the free roller conveyor 24, in the direction perpendicular to the conveying direction, and in the turning direction around the vertical axis of the second optical member joined body PA2 And is conveyed to the free roller conveyor 24 in the state of FIG.

The second dust collector 16 is disposed on the upstream side of the panel conveyance of the nip press roll 23, which is the joining position of the second joining device 17. [ The second dust collector 16 performs static elimination and dust collection to remove the dust around the second optical member joined body PA2 before introduction to the bonding position, particularly dust on the lower surface side.

The second joining apparatus 17 is provided on the downstream side of the panel conveying than the second dust collecting apparatus 16. The second joining apparatus 17 is provided with a joining sheet F5 (equivalent to the second sheet piece F2m) cut to a predetermined size with respect to the lower surface of the second optical member joined body PA2 introduced into the joining position I do. The second joining apparatus 17 is provided with a conveying device 22 and a nip pressure roll 23 similar to those of the first joining apparatus 13.

The second optical member joined body PA2 and the second sheet piece F2m are provided in the gap between the pair of joining rollers 23a of the sandwiching press roll 23 (the joining position of the second joining apparatus 17) Overlapping. The second sheet piece F2m is a sheet piece of the second optical sheet F2 having a size larger than the display area P4 of the liquid crystal panel P. [

The second optical member joined body PA2 and the second sheet piece F2m are sent to the downstream side of the panel conveyance of the downstream conveyor 7 while being clamped and pressed against the respective joining rollers 23a. The surface of the liquid crystal panel P on the display surface side (the surface opposite to the surface of the second optical member joined body PA2 bonded with the first optical member F11) The second sheet member F2m is joined to the third optical member joined body PA3.

The second detecting device 42 is provided on the downstream side of the panel conveying than the second joining device 17. The second detecting device 42 detects the end edge of the junction surface of the liquid crystal panel P and the second sheet piece F2m (hereinafter sometimes referred to as the second junction surface). The data of the end edge detected by the second detecting device 42 is stored in a storage unit (not shown).

The cut position of the second sheet piece F2m is adjusted based on the end edge detection result of the second joining face. The control unit 40 (see Fig. 1) acquires the end edge data of the second joint surface stored in the storage unit, and the second optical member F12 is located outside the liquid crystal panel P So that the size of the second sheet piece F2m does not protrude. The second cutting device 32 cuts the second sheet piece F2m at the cut position determined by the control unit 40. [

The second cutting device 32 is provided downstream of the second detecting device 42 on the downstream side of the panel conveyance. The second cutting device 32 cuts the laser beam along the end edge of the second joining surface to form a second sheet piece (hereinafter, referred to as " second joining face ") of the portion outwardly projected from the third joining face F2m (the excess portion of the second sheet member F2m) are separated to form an optical member (second optical member F12) having a size corresponding to the second joining face.

The excess portion of the second sheet piece F2m is separated from the third optical member joined body PA3 by the second cutting device 32 so that the second optical member F12 is provided on the surface of the liquid crystal panel P on the display surface side, A fourth optical member joined body PA4 (optical member joined body) formed by bonding the first optical member F11 to the backlight side surface of the liquid crystal panel P is formed. The surplus portion separated from the second sheet piece F2m is peeled off from the liquid crystal panel P by the peeling apparatus not shown.

Here, the first cutting device 31 and the second cutting device 32 are CO ₂ laser cutters, for example. The first cutting device 31 and the second cutting device 32 cut the sheet piece FXm bonded to the liquid crystal panel P along the outer circumferential edge of the bonding surface in an uncut form.

A bonding inspection apparatus (not shown) is provided on the downstream of the second bonding apparatus 17 on the panel transportation side. The bonding inspection apparatus determines whether or not the position of the optical member F1X is appropriate (whether the positional deviation is within the tolerance range or not), the inspection of the work (liquid crystal panel P) ), Etc.) are performed. The workpiece determined to have an inappropriate position of the optical member F1X with respect to the liquid crystal panel P is discharged to the outside of the system by a removal means not shown.

Further, in this embodiment, the control unit 40 as an electronic control unit for collectively controlling each part of the film bonding system 1 includes a computer system. The computer system includes an arithmetic processing unit such as a CPU and a storage unit such as a memory or a hard disk.

The control unit 40 of the present embodiment includes an interface capable of performing communication with an external device of the computer system. The control unit 40 may be connected to an input device capable of inputting an input signal. The above-mentioned input device includes an input device such as a keyboard and a mouse, or a communication device capable of inputting data from an external device of the computer system. The control unit 40 may include a display device such as a liquid crystal display or the like that indicates the operation status of each part of the film bonding system 1 or may be connected to the display device.

In the storage unit of the control unit 40, an operating system (OS) for controlling the computer system is installed. A program for executing processing for causing the optical sheet F to be transported with high precision to each section of the film bonding system 1 is recorded in the storage section of the control section 40 by controlling each section of the film bonding system 1 in the arithmetic processing section have. The arithmetic processing unit of the control unit 40 can read various types of information including a program recorded in the storage unit. The control unit 40 may include a logic circuit such as an ASIC for executing various processes required for each sub control of the film bonding system 1. [

The storage section is a concept including a semiconductor memory such as a RAM (Random Access Memory) and a ROM (Read Only Memory), an external storage device such as a hard disk, a CD-ROM reading device, a disk type storage medium and the like. The storage section is functionally equivalent to the first adsorption device 11, the first dust collecting device 12, the first joining device 13, the first detecting device 41, the first cutting device 31, the reversing device 15 Described control procedure of the operation of the first adsorption device 20, the second adsorption device 20, the second dust collector 16, the second joining device 17, the second detection device 42 and the second cutting device 32 A storage area for storing software, and various other storage areas are set.

Hereinafter, an example of a method of determining the bonding position (relative bonding position) of the sheet piece FXm with respect to the liquid crystal panel P will be described with reference to Figs. 8A and 8B. Fig.

First, as shown in Fig. 8A, a plurality of inspection points CP are set in the width direction of the optical sheet FX, and the direction of the optical axis of the optical sheet FX at each inspection point CP is detected . The timing for detecting the optical axis may be during the production of the far-end roll R1 or may be from the far-end roll R1 until the optical sheet FX is pulled out to half cut. Data in the direction of the optical axis of the optical sheet FX is stored in a storage unit associated with the position of the optical sheet FX (position in the longitudinal direction and widthwise direction of the optical sheet FX) and not shown.

The control unit 40 acquires the data of the optical axis of each inspection point CP (inspection data on the in-plane distribution of the optical axis) from the storage unit and obtains the optical sheet FX at the portion where the sheet piece FXm is cut (The region defined by the entrance line CL) of the optical axis.

For example, as shown in Fig. 8B, the angle (deviation angle) between the direction of the optical axis and the edge line EL of the optical sheet FX is detected for each inspection point CP, (= (Θmax + θmin) / 2) of the maximum deviation angle θmax and the minimum deviation angle θmin when the minimum deviation angle (maximum deviation angle) is θmax and the smallest angle (minimum deviation angle) . The direction of the average deviation angle? Mid with respect to the edge line EL of the optical sheet FX is detected as the direction of the average optical axis of the optical sheet FX. The shift angle is calculated by setting the direction of the left turn to positive and the direction of the right turn to negative with respect to the edge line EL of the optical sheet FX, for example.

The liquid crystal panel P is disposed so that the direction of the optical axis of the optical sheet FX detected by the above method forms a desired angle with respect to the long side or the short side of the display region P4 of the liquid crystal panel P. [ (Relative bonding position) of the sheet member FXm with respect to the sheet member FXm is determined. For example, in the case where the optical axis F1X of the optical member F1X is set at 90 degrees with respect to the long side or the short side of the display region P4 according to the design specifications, the average of the optical sheets FX The sheet piece FXm is bonded to the liquid crystal panel P so that the direction of the optical axis is 90 占 with respect to the long side or the short side of the display region P4.

The cutting devices 31 and 32 described above detect the outer edge of the display area P4 of the liquid crystal panel P by detecting means such as a camera and detect the sheet flakes FXm bonded to the liquid crystal panel P as the bonding surface Is cut endlessly along the outer circumferential edge. The outer peripheral edge of the bonding surface is detected by picking up an edge of the edge of the bonding surface. In the present embodiment, laser cutting is performed by the cutting devices 31 and 32 along the outer circumferential edge of the joint surface.

The swing width (tolerance) of the cutting line of the laser processing machine is smaller than the swing width (tolerance) of the cutting line of the cutting edge. Therefore, in the present embodiment, compared with the case where the optical sheet FX is cut by using the cutting edge, it is possible to easily cut along the outer circumferential edge of the bonding surface, and the size of the liquid crystal panel P can be reduced and / (P4) can be increased. This is effective for application to a high-performance mobile which requires enlargement of the display screen while limiting the size of the housing, as in recent smart phones and tablet terminals.

In the case where the optical sheet FX is joined to the liquid crystal panel P after being cut into sheet pieces which are aligned with the display area P4 of the liquid crystal panel P, And the dimensional tolerances of the sheet piece and the liquid crystal panel P are overlapped with each other, it is difficult to narrow the width of the frame portion G of the liquid crystal panel P (it is difficult to enlarge the display area).

On the other hand, a sheet piece FXm of the optical sheet FX having a size which is discharged out of the optical sheet FX to the outside of the liquid crystal panel P is cut out and the cut sheet piece FXm is cut into the liquid crystal panel P, The tolerance of the width of the frame portion G can be reduced (± 0.1 mm or less). Also in this case, the width of the frame portion G of the liquid crystal panel P can be narrowed (the display area can be enlarged).

In addition, by cutting the sheet piece FXm with a laser instead of a blade, a force at the time of cutting is not inputted to the liquid crystal panel P, and cracks or incisions are less likely to occur at the edge of the substrate of the liquid crystal panel P , The durability against the heat cycle and the like is improved. Likewise, since the liquid crystal panel P is not in contact, the damage to the electric component mounting portion is also small.

Fig. 9 is a perspective view for explaining the operation of the detection device according to the comparative example. Fig.

10 is a cross-sectional view for explaining the operation of the detection device according to the comparative example.

11 is a perspective view for explaining the operation of the detecting apparatus according to the present embodiment.

12 is a cross-sectional view for explaining the operation of the detecting apparatus according to the present embodiment.

9 to 12, for convenience sake, the side where the first sheet member F1m of the first optical member joined body PA1 is joined is shown as an upper side.

9 to 12, when the end face of the second substrate P2 is shifted outward beyond the end face of the first substrate P1, the first sheet member F1m of the first optical member joined body PA1, And an end edge ED of the first abutment surface SA1 is picked up from the bonded side. 9 to 12, reference numeral VL denotes the imaging direction of the imaging device (the normal direction of the imaging surface of the imaging device). 9 to 12, for convenience, the illustration of the illumination light source and the imaging device constituting the detection device is omitted.

As shown in Fig. 9, in the detection device according to the comparative example, the imaging direction VL of the imaging device is perpendicular to the first abutment surface SA1. In this case, as shown in Fig. 10, the end edge of the second substrate P2 is drawn in the imaging visual field of the imaging device. Thus, the end edge of the second substrate P2 is erroneously detected when the end edge ED of the first abutment surface SA1 is detected over the first sheet piece F1m. In other words, the image pickup device picks up an edge edge image of the second substrate P2 instead of the edge edge ED of the first contact surface SA1. As a result, the end edge ED of the first abutment surface SA1 can not be detected with high accuracy.

On the other hand, as shown in Fig. 11, in the detecting apparatus according to the present embodiment, the imaging direction VL of the imaging device obliquely intersects the normal direction of the first abutment surface SA1. Specifically, as shown in Fig. 12, the image pickup direction VL of the image pickup device is inclined inward to the end edge ED. That is, the imaging direction VL of the imaging device is set such that the end edge of the second substrate P2 is not drawn into the imaging visual field of the imaging device. Thus, when the end edge ED of the first joining surface SA1 is detected over the first sheet piece F1m, the end edge of the second substrate P2 is not erroneously detected, Only the edge ED of the end portion SA1 can be detected. Therefore, the end edge ED of the first abutment surface SA1 can be detected with high accuracy.

9 to 12, in the case where the end face of the second substrate P2 is shifted outward beyond the end face of the first substrate P1, the first sheet member of the first optical member assembly PA1 The end edge ED of the first abutment surface SA1 is picked up from the side to which the first abutting surface F1m is joined, but the present invention is not limited thereto.

13 is a cross-sectional view for explaining the operation of the detection device according to the present embodiment in the case of applying the modified example of the first optical member joined body.

In Fig. 13, for convenience, the side where the first sheet member F1m of the first optical member joined body PA1 'is joined is shown as an upper side.

For example, as shown in Fig. 13, when there is a burr at the time of panel division on the end face of the liquid crystal panel P ', the first sheet member F1m of the first optical member joined body PA1' The detection device according to the present embodiment can also be applied to the example in which the end edge ED of the first abutment surface SA1 is imaged from the joined side beyond the first sheet piece F1m.

According to the film joining system 1 of the present embodiment, the sheet piece F1m and the sheet piece F2m each having a size protruding to the outside of the liquid crystal panel P are bonded to the liquid crystal panel P The optical member F11 and the optical member F12 each having a size corresponding to the bonded surface are separated from the surface of the liquid crystal panel P by separating the surplus portions of the sheet member F1m and the sheet member F2m . As a result, the optical member F11 and the optical member F12 can be installed close to the joint surface with high accuracy, and the frame portion outside the display region P4 can be narrowed, thereby enlarging the display region and downsizing the device .

The sheet piece F1m and the sheet piece F2m are bonded to the liquid crystal panel P by joining the sheet piece F1m and the sheet piece F2m each having a size outward to the outside of the liquid crystal panel P, Even when the optical axis direction of each of the sheet piece F1m and the sheet piece F2m changes according to the position of the sheet piece F1m and the sheet piece F2m, the liquid crystal panel P can be aligned and bonded in accordance with the optical axis direction. This makes it possible to improve the precision in the optical axis direction of the optical member F11 and the optical member F12 with respect to the liquid crystal panel P and improve the uniformity and contrast of the optical display device.

When the cutting device 31 and the cutting device 32 cut the sheet piece F1m and the sheet piece F2m into a blade by laser cutting the sheet piece Fl and the sheet piece F2m, The liquid crystal panel P does not have a force, cracks and cuts are less likely to occur, and stable durability of the liquid crystal panel P can be obtained.

Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the example. Various shapes and combinations of the constituent members shown in the above-described examples are merely examples, and various modifications are possible based on design requirements and the like without departing from the gist of the present invention.

1: Film Bonding System (Manufacturing Apparatus for Optical Member Assembly)
23: nip press roll (joining device)
31: First cutting device
32: second cutting device
41: first detection device
42: second detection device
43:
44: Lighting light source
P: Liquid crystal panel (optical display part)
P1: first substrate
P2: second substrate
FX: Optical sheet
FXm: sheet
F1X: optical member
PA1: first optical member joined body (sheet ring bonding body)
PA4: fourth optical member joined body (optical member joined body)
SA1: first bonding surface
ED: End edge

Claims (11)

A detecting device for detecting an edge of an end surface of a junction surface of an optical display part and a surface of a sheet piece joined together by a sheet piece having a size projecting to the outside of the optical display part with respect to an optical display part,
An illumination light source for illuminating the end edge,
And an image pickup device disposed at a position inclined to the inside of the abutment surface with respect to a normal direction of the abutment surface with respect to a normal direction of the abutment surface and to pick up an image of the end edge on the side where the sheet bundle is joined to the sheet binding assembly . The detection device according to claim 1, wherein the illumination light source is disposed on a side opposite to a side where the sheet piece is joined to the sheet singulation conjugate. 3. The detection device according to claim 2, wherein the illumination light source is disposed at a position inclined outwardly of the abutment surface with respect to a normal direction of the abutting surface with respect to the end edge. The detection device according to any one of claims 1 to 3, wherein the illumination light source and the imaging device are respectively disposed at positions corresponding to four corner portions of the junction surface having a rectangular shape. The detection device according to any one of claims 1 to 4, wherein the optical display component is formed by joining two substrates. An optical member joined body manufactured by bonding an optical member to an optical display part,
A joining device for joining a sheet piece having a size to the outside of the optical display component to the outside of the optical display component to form a sheet joining body;
The detection device according to any one of claims 1 to 5, wherein the detection device detects the edge portion of the joint between the optical display component and the sheet piece of the sheet-
And cutting the sheet piece at a portion outwardly projected from the joining surface from the sheet joining body by performing laser cutting along the end edge to form the optical member having a size corresponding to the joining surface, And an apparatus for manufacturing an optical member joined body. A detecting device for detecting an end edge of a surface of a substrate,
An illumination light source for illuminating the end edge,
And an image pickup device disposed at a position inclined inwardly of the one surface with respect to the normal direction of the one surface and picking up an image of the edge at one surface side of the substrate. The detection device according to claim 7, wherein the illumination light source is disposed on the side opposite to the one surface side of the substrate. 9. The detection apparatus according to claim 8, wherein the illumination light source is disposed at a position inclined outward from the one side of the one side in relation to the normal direction of the one side. 10. The detection device according to any one of claims 7 to 9, wherein the illumination light source and the imaging device are respectively disposed at positions corresponding to the four corner portions of the one surface having a rectangular shape. A method of manufacturing an optical member joined body by bonding an optical member to an optical display part,
A joining step of joining a sheet piece having a size projecting to the outside of the optical display part to the optical display part to form a sheet joining body;
Wherein said optical fiber sheet and said sheet piece bonding body are arranged in a direction inclined inward of said bonding surface with respect to a normal direction of said bonding surface while illuminating an end edge of said optical display component and said sheet- A detection step of obtaining an image of the end edge on the side where the sheet piece is bonded and detecting a joint surface of the optical display part and the sheet piece from the obtained image,
And cutting the sheet piece at a portion outwardly projected from the joining surface from the sheet joining body by performing laser cutting along the end edge to form the optical member having a size corresponding to the joining surface, ≪ / RTI >

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