JP6037551B2 - Equipment for manufacturing optical member laminate - Google Patents

Description

  The present invention relates to an apparatus for manufacturing an optical member bonded body.

  Conventionally, a manufacturing system described in Patent Document 1 is known as a manufacturing system for an optical display device such as a liquid crystal display device. The optical display device is formed by bonding an optical member such as a polarizing plate to an optical display unit such as a liquid crystal cell.

  An optical display device manufacturing system is provided with a bonding device that bonds an optical member to an optical display unit. The bonding apparatus is provided in the isolation structure. A blower for generating an air flow of clean air is provided on the ceiling of the isolation structure. A corona discharge type ionizer is provided in the vicinity of the bonding apparatus and above the optical display unit as ionization means for constituting the airflow with ionized gas. Thereby, it is comprised so that the gas flow of ionized gas may act on an optical display unit.

  Therefore, foreign matter such as dust falling from the ceiling is prevented from entering the bonding surface between the optical member and the optical display unit. In addition, static electricity generated by charging the optical display unit due to contact friction between the optical display unit and the conveying unit can be eliminated, and electrostatic destruction of the optical display unit can be suppressed.

JP 2009-163225 A

  Incidentally, static electricity is also generated when the optical member is charged by peeling the release film from the sheet product having the optical member having the release film attached thereto. When the air blower and the ionizer are arranged on the side of the surface of the optical member that is bonded to the optical display unit (the upper surface side of the optical member), the air current is sufficiently applied to the upper surface side of the optical member to Static electricity on the top surface can be removed.

  However, in this case, it is difficult to neutralize static electricity on the lower surface of the optical member because the air current cannot sufficiently act on the lower surface side of the optical member. When static electricity is charged on the lower surface of the optical member, when the optical member and the optical display unit are pressed and bonded together by the nip roll, the surface of the nip roll is easily charged by the contact between the lower surface of the optical member and the nip roll. . If it does so, it will become easy to accumulate foreign materials, such as dust, on the surface of a nip roll. For this reason, there is a problem that foreign matter accumulated on the nip roll adheres to the surface of the optical member, and as a result, the foreign matter adheres to the surface of the optical display device.

  This invention is made | formed in view of such a situation, Comprising: Static electricity is suppressed on the surface of an optical member, and it can suppress that a foreign material adheres to the surface of an optical member bonding body. It aims at providing the manufacturing apparatus of an optical member bonding body.

In order to achieve the above object, the present invention employs the following means.
(1) That is, the manufacturing apparatus of the optical member bonding body which concerns on the 1st aspect of this invention is a manufacturing apparatus of the optical member bonding body formed by bonding an optical member to an optical display component, Comprising: With the said optical member, A separator that is separably stacked on one surface of the optical member; a transport unit that transports the optical sheet; and the optical member separated from the separator that constitutes the optical sheet transported from the transport unit A separation unit that supplies the separated optical member to a bonding position where the optical member is bonded to the optical display component, and a bonding unit that bonds the optical member supplied from the separation unit to the optical display component. and engaging portion, wherein arranged on the conveying path of the optical member, seen including and a ionizer for irradiating soft X-rays to the surface of the optical member separated from the separator, the separation unit, the optical sheet The optical display including a knife edge that wraps around a corner and separates the optical member from the separator while supplying the separated optical member to the bonding position, and the bonding portion is supplied to the bonding position. A pinching roll for bonding the optical member supplied from the knife edge to a component, and the ionizer irradiates the surface of the optical member separated from the separator from the knife edge side with the soft X-rays By doing so, the soft X-ray which permeate | transmitted the said optical member is comprised so that the surface of the said pinching roll may be irradiated .

(2) an optical member bonded body of the manufacturing apparatus described in (1) is on the conveying path of the optical member, even if the cover is provided for shielding the soft X-rays emitted from the ionizer Good.

  According to the present invention, there is provided an apparatus for manufacturing an optical member bonded body that can suppress static electricity from being charged on the surface of an optical member and can prevent foreign matter from adhering to the surface of the optical member bonded body. Can do.

It is a schematic diagram which shows the manufacturing apparatus of the optical member bonding body which concerns on one Embodiment of this invention. It is A arrow directional view of FIG. It is a top view of a liquid crystal panel. It is sectional drawing of an optical sheet. It is a figure which shows operation | movement of a cutting device. It is a top view which shows the arrangement | positioning relationship between an ionizer and a cover. It is a side view which shows the arrangement | positioning relationship between an ionizer and a cover. It is a figure which shows the ionizer during a static elimination process. It is a figure which shows the time change of the charging voltage at the time of separator peeling about each of a comparative example and an Example.

  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 the drawings below, the dimensions and ratios of the respective constituent elements are appropriately changed in order to make the drawings easy to see. In the following description and drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.

  In the following description, an XYZ orthogonal coordinate system is set as necessary, and the positional relationship of each member will be described with reference to this XYZ orthogonal coordinate system. In the present embodiment, the transport direction of the liquid crystal panel, which is an optical display component, is 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. The direction orthogonal to the Z direction is taken as the Z direction.

Hereinafter, the film bonding system 1 which is a manufacturing apparatus of the optical member bonding body which concerns on one Embodiment of this invention is demonstrated with reference to drawings.
Drawing 1 is a figure showing the schematic structure of film pasting system 1 of this embodiment.
The film bonding system 1 bonds a film-shaped optical member such as a polarizing film, an antireflection film, and a light diffusion film to a panel-shaped optical display component such as a liquid crystal panel or an organic EL panel.

  In addition, in this embodiment, liquid crystal panel P is illustrated as said optical display component, and double-sided bonding panel P12 formed by bonding the bonding sheet | seat F5 on both front and back surfaces of liquid crystal panel P is illustrated as an optical member bonding body. However, the present invention is not limited to this.

  As shown in FIG. 1, the film bonding system 1 of this embodiment is provided as one process of the manufacturing line of liquid crystal panel P. As shown in FIG. Each part of the film bonding system 1 is comprehensively controlled by the control part 40 as an electronic control apparatus.

FIG. 2 is a view taken in the direction of arrow A in FIG.
As shown in FIG. 2, the film bonding system 1 of this embodiment reverses 90 degree | times of the attitude | position of the liquid crystal panel P with respect to the conveyance direction of the liquid crystal panel P on the way. The film bonding system 1 bonds the polarizing film F1 on the front and back surfaces of the liquid crystal panel P so that the polarization axes are orthogonal to each other.

  FIG. 3 is a plan view of the liquid crystal panel P as viewed from the thickness direction of the liquid crystal layer P3. The liquid crystal panel P includes a first substrate P1 that has a rectangular shape in plan view, a second substrate P2 that has a relatively small rectangular shape that is disposed to face the first substrate P1, a first substrate P1, and a second substrate. And a liquid crystal layer P3 sealed between the substrate P2. The liquid crystal panel P has a rectangular shape that follows the outer shape of the first substrate P1 in a plan view, and a region that fits inside the outer periphery of the liquid crystal layer P3 in a plan view is a display region P4.

FIG. 4 is a cross-sectional view of the optical sheet F including the optical member F1 bonded to the liquid crystal panel P. In FIG. 4, hatching of each layer in the cross-sectional view is omitted for convenience.
As shown in FIG. 4, the optical sheet F includes a film-like optical member F1, an adhesive layer F2 provided on one surface (upper surface in the drawing) of the optical member F1, and the optical member F1 via the adhesive layer F2. The separator F3 is detachably stacked on one surface of the optical member F1, and the surface protective film F4 is stacked on the other surface (lower surface in the drawing) of the optical member F1. The optical member F1 functions as a polarizing plate, and is bonded over the entire display area P4 of the liquid crystal panel P and its peripheral area.

  The optical member F1 is bonded to the liquid crystal panel P via the adhesive layer F2 in a state where the separator F3 is separated while leaving the adhesive layer F2 on one surface thereof. Hereinafter, the part remove | excluding the separator F3 from the optical sheet F is called the bonding sheet | seat F5.

  The separator F3 protects the adhesive layer F2 and the optical member F1 until it is separated from the adhesive layer F2. The surface protective film F4 is bonded to the liquid crystal panel P together with the optical member F1. The surface protective film F4 is disposed on the side opposite to the liquid crystal panel P with respect to the optical member F1, protects the optical member F1, and is separated from the optical member F1 at a predetermined timing. The optical sheet F may be configured not to include the surface protective film F4, or the surface protective film F4 may be configured not to be separated from the optical member F1.

  The optical member F1 includes a sheet-like polarizer F6, a first film F7 bonded to one surface of the polarizer F6 with an adhesive or the like, and a first film F7 bonded to the other surface of the polarizer F6 with an adhesive or the like. 2 film F8. The first film F7 and the second film F8 are protective films that protect the polarizer F6, for example.

  The optical member F1 may have a single-layer structure including a single optical layer, or may have a stacked structure in which a plurality of optical layers are stacked on each other. In addition to the polarizer F6, the optical layer may be a retardation film, a brightness enhancement film, or the like. At least one of the first film F7 and the second film F8 may be subjected to a surface treatment capable of obtaining an effect such as a hard coat treatment for protecting the outermost surface of the liquid crystal display element or an antiglare treatment. The optical member F1 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 F3 may be bonded to one surface of the optical member F1 via the adhesive layer F2.

Next, the film bonding system 1 of this embodiment is demonstrated in detail.
As shown in FIG. 1, the film bonding system 1 of the present embodiment has a downstream side (− in the conveyance direction of the liquid crystal panel P on the left side in the drawing from the upstream side in the conveyance direction (+ X direction side) of the liquid crystal panel P on the right side in the drawing (−). X-direction side), and a drive type roller conveyor 5 that conveys the liquid crystal panel P in a horizontal state is provided.

  The roller conveyor 5 is divided into an upstream conveyor 6 and a downstream conveyor 7 with a reversing device 15 described later as a boundary. As shown in FIG. 2, in the upstream conveyor 6, the liquid crystal panel P is transported so that the short side of the display area P4 is along the transport direction. On the other hand, on the downstream conveyor 7, the liquid crystal panel P is transported with the long side of the display area P <b> 4 along the transport direction. A bonding sheet F5 cut out to a predetermined length from the belt-shaped optical sheet F is bonded to the front and back surfaces of the liquid crystal panel P.

  In addition, the upstream conveyor 6 is provided with the independent free roller conveyor 24 in the downstream in the 1st adsorption | suction apparatus 11 mentioned later. On the other hand, the downstream conveyor 7 includes an independent free roller conveyor 24 on the downstream side in the second suction device 20 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 ionizer 31, a first cover 33, a first inspection device 14, and a reversing device 15. , The second dust collecting device 16, the second bonding device 17, the second ionizer 32, the second cover 34, the second inspection device 18, and the control unit 40.

  The first suction device 11 sucks and transports the liquid crystal panel P to the upstream conveyor 6 and performs alignment (positioning) of the liquid crystal panel P. The first suction device 11 includes a panel holding unit 11a, an alignment camera 11b, and a rail R.

  The panel holding part 11a holds the liquid crystal panel P in contact with the downstream stopper S by the upstream conveyor 6 so as to be movable in the vertical direction and the horizontal direction, and aligns the liquid crystal panel P. The panel holding part 11a sucks and holds the upper surface of the liquid crystal panel P in contact with the stopper S by vacuum suction. The panel holding part 11a moves on the rail R in a state where the liquid crystal panel P is sucked and held, and transports the liquid crystal panel P. When the conveyance is finished, the panel holding unit 11 a releases the suction holding and delivers the liquid crystal panel P to the free roller conveyor 24.

In the alignment camera 11b, the panel holding unit 11a holds the liquid crystal panel P in contact with the stopper S, and images the alignment mark, tip shape, and the like of the liquid crystal panel P in the raised state. Image data obtained by the alignment camera 11b is transmitted to the control unit 40. Based on the image data, the panel holding unit 11a is operated to align the liquid crystal panel P with the free roller conveyor 24 as a transport destination. In other words, the liquid crystal panel P is transported to the free roller conveyor 24 in consideration of the transport direction with respect to the free roller conveyor 24, the direction orthogonal to the transport direction, and the deviation in the turning direction around the vertical axis of the liquid crystal panel P. .
Here, the liquid crystal panel P conveyed on the rail R by the panel holding portion 11a is sandwiched by the pressure roll 23 together with a bonding sheet F5 described later in a state of being sucked by the suction pad 26.

  The 1st dust collector 12 is provided in the conveyance upstream of the liquid crystal panel P of the pinching roll 23 which is the bonding position of the 1st bonding apparatus 13. FIG. The first dust collector 12 removes static electricity and collects dust in order to remove dust around the liquid crystal panel P before being introduced to the bonding position, particularly dust on the lower surface side.

  The 1st bonding apparatus 13 is provided in the panel conveyance downstream rather than the 1st adsorption | suction apparatus 11. FIG. The 1st bonding apparatus 13 bonds the bonding sheet | seat F5 cut into the predetermined size with respect to the lower surface of liquid crystal panel P introduced into the bonding position.

  The first bonding device 13 includes a transport device 22 and a pinching roll 23.

  The conveying device 22 conveys the optical sheet F along the longitudinal direction while unwinding the optical sheet F from the original roll R1 around which the optical sheet F is wound. The conveyance apparatus 22 conveys the bonding sheet | seat F5 by using the separator F3 as a carrier. The conveyance device 22 includes a roll holding portion 22a, a plurality of guide rollers 22b, a cutting device 22c, a knife edge 22d, and a winding portion 22e. Here, the roll holding unit 22a and the plurality of guide rollers 22b correspond to a conveyance unit described in the claims. The cutting device 22c and the knife edge 22d correspond to a separation unit described in the claims.

The roll holding unit 22a holds the original roll R1 around which the belt-shaped optical sheet F is wound, and feeds the optical sheet F along its longitudinal direction.
The plurality of guide rollers 22b wind the optical sheet F so as to guide the optical sheet F unwound from the original roll R1 along a predetermined conveyance path.
The cutting device 22c performs a half cut on the optical sheet F on the conveyance path.
The knife edge 22d supplies the bonding sheet F5 to the bonding position while winding the optical sheet F subjected to the half cut at an acute angle to separate the bonding sheet F5 from the separator F3.
The winding unit 22e holds a separator roll R2 that winds up the separator F3 that has become independent through the knife edge 22d.

  The roll holding unit 22a positioned at the start point of the transport device 22 and the winding unit 22e positioned at the end point of the transport device 22 are driven in synchronization with each other, for example. Thereby, the winding unit 22e winds up the separator F3 that has passed through the knife edge 22d while the roll holding unit 22a feeds the optical sheet F in the transport direction. Hereinafter, the upstream side in the transport direction of the optical sheet F (separator F3) in the transport device 22 is referred to as a sheet transport upstream side, and the downstream side in the transport direction is referred to as a sheet transport downstream side.

  Each guide roller 22b changes the traveling direction of the optical sheet F being conveyed along the conveyance path, and at least a part of the plurality of guide rollers 22b is movable so as to adjust the tension of the optical sheet F being conveyed.

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

FIG. 5 is a diagram illustrating the operation of the cutting device 22c of the present embodiment.
As shown in FIG. 5, when the optical sheet F is fed out by a predetermined length, the cutting device 22c applies a part in the thickness direction of the optical sheet F over the entire width in the width direction orthogonal to the longitudinal direction of the optical sheet F. Make a half-cut to cut. The cutting device 22c of the present embodiment is provided so as to be able to advance and retreat toward the optical sheet F from the side opposite to the separator F3 with respect to the optical sheet F.

  The cutting device 22c adjusts the advancing / retreating position of the cutting blade so that the optical sheet F (separator F3) is not broken by the tension acting during the conveyance of the optical sheet F (so that a predetermined thickness remains in the separator F3). Half-cut to the vicinity of the interface between the adhesive layer F2 and the separator F3. In addition, you may use the laser apparatus replaced with a cutting blade.

  By cutting the optical member F1 and the surface protection film F4 in the thickness direction in the optical sheet F after half-cutting, cut lines L1 and L2 are formed over the entire width in the width direction of the optical sheet F. The cut lines L <b> 1 and L <b> 2 are formed so as to be aligned in the longitudinal direction of the belt-shaped optical sheet F. For example, in the case of the bonding process which conveys the liquid crystal panel P of the same size, the plurality of cut lines L1 and L2 are formed at equal intervals in the longitudinal direction of the optical sheet F. The optical sheet F is divided into a plurality of sections in the longitudinal direction by a plurality of cut lines L1, L2. A section sandwiched between a pair of cut lines L1 and L2 adjacent in the longitudinal direction in the optical sheet F is a sheet piece in the bonding sheet F5.

  Returning to FIG. 1, the knife edge 22 d is disposed below the upstream conveyor 6 and extends at least over the entire width in the width direction of the optical sheet F. The knife edge 22d is wound so as to come into sliding contact with the separator F3 side of the optical sheet F after half-cutting.

  The knife edge 22d is seen from the width direction of the optical sheet F above the first surface, and the first surface arranged in an inclined position when viewed from the width direction of the optical sheet F (width direction of the upstream conveyor 6). It has the 2nd surface arrange | positioned at an acute angle with respect to a 1st surface, and the front-end | tip part where a 1st surface and a 2nd surface cross.

  The knife edge 22d winds the optical sheet F at an acute angle at its tip. The optical sheet F separates the sheet piece of the bonding sheet F5 from the separator F3 when turning back at an acute angle at the tip of the knife edge 22d. The tip end of the knife edge 22d is arranged close to the panel conveyance downstream side of the pinching roll 23. The bonding sheet F5 separated from the separator F3 by the knife edge 22d is introduced between the pair of bonding rollers 23a of the pressure roll 23 while overlapping the lower surface of the liquid crystal panel P in the state of being sucked by the first suction device 11. The

  On the other hand, the separator F3 separated from the bonding sheet F5 is directed to the winding portion 22e by the knife edge 22d. The winding part 22e winds up the separator F3 separated from the bonding sheet F5. to recover.

  The pinching roll 23 bonds the bonding sheet F5 having a predetermined length separated from the optical sheet F by the conveying device 22 to the lower surface of the liquid crystal panel P conveyed by the upstream conveyor 6. Here, the pinching roll 23 is equivalent to the bonding part as described in a claim. The pinching roll 23 has a pair of bonding rollers 23a and 23a arranged in parallel with each other in the axial direction (the upper bonding roller 23a moves up and down). A predetermined gap is formed between the pair of bonding rollers 23 a and 23 a, and the inside of this gap is the bonding position of the first bonding apparatus 13. The liquid crystal panel P and the bonding sheet F5 are overlapped and introduced into the gap. These liquid crystal panels P and the bonding sheet | seat F5 are sent out to the panel conveyance downstream of the upstream conveyor 6, being pinched by each bonding roller 23a. Thereby, the bonding sheet | seat F5 is integrally bonded by the lower surface of liquid crystal panel P. FIG. Hereinafter, the panel after this bonding is called single-sided bonding panel P11.

  The first ionizer 31 is disposed on the conveyance path of the optical sheet F. The first ionizer 31 irradiates the surface of the bonding sheet F5 separated from the separator F3 with soft X-rays. Here, soft X-ray means X-ray having irradiation energy in the range of about 0.1 keV to 2 keV. With the irradiation energy of soft X-rays, the atmosphere around the charged bonding sheet F5 can be ionized to neutralize static electricity.

  On the transport path of the optical sheet F, a first cover 33 for shielding soft X-rays irradiated from the first ionizer 31 is provided. The first cover 33 covers the first adsorption device 11, a part of the first bonding device 13 (separation part and pinching roll 23), the first inspection device 14, etc., with the first ionizer 31 as the center. Is provided. As a material for forming the first cover 33, for example, aluminum, iron, stainless steel, vinyl chloride, or the like can be used.

FIG. 6 is a plan view showing the positional relationship between the first ionizer 31 and the first cover 33.
FIG. 7 is a side view showing the positional relationship between the first ionizer 31 and the first cover 33.
As shown in FIG. 6, soft X-rays are isotropically emitted in a fan shape from the first ionizer 31. The soft X-ray emission angle θ (center angle) is set to about 120 °. Thereby, the soft X-ray is irradiated to the surface of the bonding sheet | seat F5 over the full width of the width direction of the bonding sheet | seat F5.

  As shown in FIG. 6, the planar shape of the first cover 33 is an X in which two rectangles (a rectangle that is long in the X direction and a rectangle that is long in the Y direction) are arranged orthogonally with the first ionizer 31 as the center. It has a letter shape. As shown in FIG. 7, the side shape of the first cover 33 is a T in which two rectangles (a rectangle that is long in the X direction and a rectangle that is long in the Z direction) are arranged orthogonally to each other with the first ionizer 31 as the center. It has a letter shape. Thereby, the soft X-ray irradiated from the 1st ionizer 31 can be shielded so that it may not leak outside.

  Returning to FIG. 1, the first inspection device 14 is provided on the downstream side of the panel conveyance from the first bonding device 13. The 1st inspection apparatus 14 test | inspects whether the position of the bonding sheet | seat F5 with respect to liquid crystal panel P is appropriate in the single-sided bonding panel P11 (whether a position shift exists in a tolerance range). The 1st test | inspection apparatus 14 has a pair of cameras 14a and 14a which image the edge of the bonding sheet | seat F5 in the panel conveyance upstream and downstream of the single-sided bonding panel P11, for example. Imaging data from each camera 14a is transmitted to the control unit 40, and it is determined whether or not the relative positions of the bonding sheet F5 and the liquid crystal panel P are appropriate based on the imaging data. The single-sided bonding panel P11 determined to have an inappropriate relative position is discharged out of the system by a not-shown payout means.

  The reversing device 15 is provided on the downstream side of the panel transport with respect to the first inspection device 14 and transports the liquid crystal panel P that has reached the end position of the upstream conveyor 6 to the start position of the downstream conveyor 7. The reversing device 15 includes, for example, a rotation shaft 15a inclined at 45 ° in a plan view with respect to the transport direction of the liquid crystal panel P, and the final position of the upstream conveyor 6 and the start of the downstream conveyor 7 via the rotation shaft 15a. And a reversing arm 15b supported between the positions.

  The reversing arm 15b holds the single-sided bonding panel P11 that has reached the final position of the upstream conveyor 6 via the first inspection device 14 by suction or clamping. The reversing arm 15b reverses the front and back of the single-sided bonding panel P11 by rotating 180 ° around the rotating shaft 15a. The reversing arm 15b changes the direction so that, for example, the single-sided bonding panel P11 transported in parallel with the short side of the display area P4 is transported in parallel with the long side of the display area P4.

  The inversion is performed when the optical members F1 to be bonded to the front and back surfaces of the liquid crystal panel P are arranged so that the polarization axis directions are perpendicular to each other. The upstream conveyor 6 and the downstream conveyor 7 both have the direction from the right side to the left side in the drawing as the transport direction of the liquid crystal panel P. However, the upstream conveyor 6 and the downstream conveyor 7 are connected via the reversing device 15. Offset by a predetermined amount in plan view.

  In the case of simply reversing the front and back of the liquid crystal panel P, for example, a reversing device having a reversing arm having a rotation axis parallel to the transport direction may be used. In this case, if the sheet conveying direction of the first bonding device 13 and the sheet conveying direction of the second bonding device 17 are arranged at right angles to each other in a plan view, the polarization axis directions are perpendicular to each other on the front and back surfaces of the liquid crystal panel P. The optical member F1 made can be pasted.

  The reversing arm 15b has the same alignment function as the panel holding portion 11a of the first suction device 11. The reversing device 15 is provided with an alignment camera 15 c similar to the alignment camera 11 b of the first suction device 11.

  Since the 2nd adsorption | suction apparatus 20 is equipped with the structure similar to the 1st adsorption | suction apparatus 11, it attaches | subjects and demonstrates the same code | symbol to the same part. The 2nd adsorption | suction apparatus 20 adsorbs the single-sided bonding panel P11, conveys it to the downstream conveyor 7, and performs alignment (positioning) of the single-sided bonding panel P11. The second suction device 20 includes a panel holding unit 11a, an alignment camera 11b, and a rail R.

  The panel holding part 11a holds the single-sided bonding panel P11 that is in contact with the downstream stopper S by the downstream conveyor 7 so as to be movable in the vertical direction and the horizontal direction, and performs alignment of the single-sided bonding panel P11. The panel holding | maintenance part 11a adsorbs and hold | maintains the upper surface of the single-sided bonding panel P11 which contact | abutted to the stopper S by vacuum suction. The panel holding | maintenance part 11a moves on the rail R in the state which adsorbed and hold | maintained the single-sided bonding panel P11, and conveys the single-sided bonding panel P11. When the conveyance is finished, the panel holding unit 11a releases the suction holding and transfers the single-sided bonding panel P11 to the free roller conveyor 24.

  In the alignment camera 11b, the panel holding unit 11a holds the single-sided bonding panel P11 that is in contact with the stopper S, and images the alignment mark, the tip shape, and the like of the single-sided bonding panel P11 in the raised state. Imaging data from the alignment camera 11b is transmitted to the control unit 40, and based on this imaging data, the panel holding unit 11a is operated to align the single-sided bonding panel P11 with respect to the free roller conveyor 24 at the transport destination. That is, the single-sided bonding panel P11 is in a state in which the amount of misalignment in the conveying direction with respect to the free roller conveyor 24, the direction orthogonal to the conveying direction, and the turning direction around the vertical axis of the single-sided bonding panel P11 is taken into account. It is conveyed to.

  The 2nd dust collector 16 is arrange | positioned in the conveyance direction upstream of the liquid crystal panel P of the pinching roll 23 which is the bonding position of the 2nd bonding apparatus 17. FIG. The second dust collecting device 16 removes static electricity and collects dust in order to remove dust around the single-sided bonding panel P11 before being introduced to the bonding position, particularly dust on the lower surface side.

  The 2nd bonding apparatus 17 is provided in the panel conveyance downstream rather than the 2nd dust collector 16. FIG. The 2nd bonding apparatus 17 bonds the bonding sheet | seat F5 cut into the predetermined size with respect to the lower surface of the single-sided bonding panel P11 introduced into the bonding position. The 2nd bonding apparatus 17 is provided with the conveying apparatus 22 and the pinching roll 23 similar to the said 1st bonding apparatus 13. FIG.

  In the gap between the pair of bonding rollers 23a of the pinching roll 23 (the bonding position of the second bonding apparatus 17), the single-sided bonding panel P11 and the bonding sheet F5 are introduced in an overlapping state, and the single-sided bonding is performed. A bonding sheet F5 is integrally bonded to the lower surface of the combined panel P11. Hereinafter, the panel after this bonding is called double-sided bonding panel P12 (optical member bonding body).

  The second ionizer 32 is disposed on the conveyance path of the optical sheet F. The second ionizer 32 irradiates the surface of the bonding sheet F5 separated from the separator F3 with soft X-rays.

  On the transport path of the optical sheet F, a second cover 34 for shielding soft X-rays irradiated from the second ionizer 32 is provided. The second cover 34 covers the second adsorption device 20, a part of the second bonding device 17 (separation unit and pinching roll 23), the second inspection device 18, etc., with the second ionizer 32 as a center. Is provided. As the forming material of the second cover 34, the same forming material as that of the first cover 33 can be used.

  The 2nd inspection apparatus 18 is provided in the panel conveyance downstream rather than the 2nd bonding apparatus 17. FIG. The 2nd inspection apparatus 18 test | inspects whether the position of the bonding sheet | seat F5 with respect to the single-sided bonding panel P11 is appropriate in the double-sided bonding panel P12 (whether a position gap exists in a tolerance range). The 2nd inspection apparatus 18 has a pair of cameras 18a and 18a which image the edge of the bonding sheet | seat F5 in the panel conveyance upstream and downstream of the double-sided bonding panel P12, for example. The imaging data by each camera 18a is transmitted to the control unit 40, and it is determined whether or not the relative positions of the bonding sheet F5 and the liquid crystal panel P are appropriate based on the imaging data. The double-sided bonded panel P12 determined to have an inappropriate relative position is discharged out of the system by a not-shown payout means.

  In addition, in this embodiment, the control part 40 as an electronic control apparatus which carries out overall control of each part of the film bonding system 1 is comprised including the computer system. This computer system includes an arithmetic processing unit such as a CPU and a storage unit such as a memory and a hard disk. The control unit 40 of the present embodiment includes an interface that can execute communication with an external device of the computer system. An input device that can input an input signal may be connected to the control unit 40. The input device includes an input device such as a keyboard and a mouse, or a communication device that can input data from a device external to the computer system. The control unit 40 may include a display device such as a liquid crystal display that indicates the operation status of each unit of the film bonding system 1 or may be connected to the display device.

  An operating system (OS) that controls the computer system is installed in the storage unit of the control unit 40. The storage unit of the control unit 40 includes a program that causes the arithmetic processing unit to control each unit of the film bonding system 1 to execute processing for causing each unit of the film bonding system 1 to accurately convey the optical sheet F. It is recorded. Various types of information including programs recorded in the storage unit can be read by the arithmetic processing unit of the control unit 40. The control unit 40 may include a logic circuit such as an ASIC that executes various processes required for controlling each unit of the film bonding system 1.

  The storage unit 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 reader, and a disk-type storage medium. The storage unit functionally includes a first adsorption device 11, a first dust collector 12, a first bonding device 13, a first ionizer 31, a first inspection device 14, a reversing device 15, a second adsorption device 20, A storage area for storing program software in which the control procedure of the operation of the second dust collector 16, the second bonding apparatus 17, the second ionizer 32, the second inspection apparatus 18 is described, and other various storage areas are set. .

(Static elimination process)
Next, an embodiment of the charge removal process of the present invention will be described in detail with reference to FIG.
FIG. 8 is a diagram illustrating the first ionizer 31 during the charge removal process. Here, the first ionizer 31 of the first ionizer 31 and the second ionizer 32 will be described as an example. Since the charge removal process of the second ionizer 32 is the same as the charge removal process of the first ionizer 31, the description of the second ionizer 32 is omitted.

  As shown in FIG. 8, the first ionizer 31 is disposed in a space between the transport path of the liquid crystal panel P and the transport path of the separator F3. The 1st ionizer 31 is arrange | positioned so that the injection surface 31a of a soft X ray may oppose the bonding surface (surface on which the bonding sheet F5 is bonded with liquid crystal panel P) of the bonding sheet F5. The first ionizer 31 is arranged so that the optical axis of soft X-rays emitted from the first ionizer passes through the gap between the pair of bonding rollers 23 a constituting the pinching roll 23.

  In the present embodiment, the first ionizer 31 irradiates the surface of the bonding sheet F5 separated from the separator F3 from the knife edge 22d side with soft X-rays, whereby the surface of the pinching roll 23 is bonded to the bonding sheet F5. Are configured to be irradiated with soft X-rays that have passed through.

  Hereinafter, the operation and effect of the charge removal process of this embodiment will be described.

  In the conventional configuration, when the blower and the corona discharge type ionizer are arranged on the side of the bonding surface with the liquid crystal panel of the bonding sheet (the upper surface side of the bonding sheet), an air flow is generated on the lower surface side of the bonding sheet. Since it cannot fully act, it will become difficult to remove static electricity from the lower surface of the bonding sheet. When the static electricity on the lower surface of the bonding sheet is charged, when the bonding sheet and the liquid crystal panel are pressed and bonded together by the pressure roller, the lower surface of the bonding sheet and the nip roll contact the surface of the pressure roller. Static electricity is easily charged. If it does so, it will become easy to accumulate foreign materials, such as dust, on the surface of a pinching roll. Therefore, the foreign material accumulated on the pinching roll adheres to the surface of the bonding sheet, and as a result, the foreign material adheres to the surface of the optical member bonding body.

  On the other hand, in this embodiment, the 1st ionizer 31 which irradiates a soft X ray is used. Soft X-rays emitted from the first ionizer 31 pass through the bonding sheet F5 separated from the separator F3. Therefore, not only static electricity charged on the surface of the bonding sheet F5 but also static electricity charged on the back surface of the bonding sheet F5 can be removed. Since static electricity on the back surface of the bonding sheet F5 can be eliminated, static electricity is suppressed from being charged on the surface of the pinching roll 23, and foreign substances such as dust are less likely to accumulate on the surface of the pinching roll 23. Therefore, it becomes difficult for foreign matter to adhere to the surface of the bonding sheet F5. Therefore, it can suppress that static electricity charges on the surface of the bonding sheet | seat F5, and can suppress that a foreign material adheres to the surface of the optical member bonding body P12.

  Moreover, since the 1st ionizer 31 is arrange | positioned in the space between the conveyance path | route of liquid crystal panel P, and the conveyance path | route of the separator F3, it is soft to the bonding sheet | seat F5 immediately after the separator F3 was isolate | separated by the knife edge 22d. A line is irradiated. Therefore, by separating the separator F3, static electricity generated when the bonding sheet F5 is charged can be instantaneously eliminated.

  Moreover, the 1st ionizer 31 irradiates the surface of the bonding sheet | seat F5 isolate | separated from the separator F3 from the knife edge 22d side, and the soft sheet | seat which permeate | transmitted the bonding sheet | seat F5 to the surface of the pinching roll 23 is irradiated. X-rays are irradiated. Therefore, in addition to neutralizing static electricity charged on the surface of the bonding sheet F5, the static electricity generated by charging of the bonding sheet F5 due to contact friction between the pinching roll 23 and the bonding sheet F5 is secondary. It can be neutralized. Therefore, it can suppress reliably that a foreign material adheres to the surface of the optical member bonding body P12.

  In addition, in this embodiment, although comprised so that the soft X-ray which permeate | transmitted the bonding sheet | seat F5 may be irradiated to the surface of the lower bonding roller 23a which comprises the pinching roll 23, it is not restricted to this. . You may be comprised so that the soft X-ray which permeate | transmitted the bonding sheet | seat F5 may be irradiated to the surface of the upper bonding roller 23a which comprises the pinching roll 23. FIG.

  As mentioned above, although the suitable embodiment example which concerns on this embodiment was demonstrated referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. 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.

  Examples of the present invention will be described below, but the present invention is not limited thereto.

(Sample preparation)
As a sample for an inspection object of a comparative example and an example, a chip-like polarizing film separated from a separator was used. The polarizing film used was a laminate of protective films made of TAC (triacetylcellulose) film on both sides of a polarizer film made of PVA (polyvinyl alcohol). The polarizing film was rectangular in plan view, and the size of the polarizing film was 30 cm square.
(Comparative Example 1)
Comparative Example 1 does not use an ionizer. That is, static electricity generated in the sample when the separator is peeled off is not removed.
(Comparative Example 2)
As the ionizer of Comparative Example 2, a corona discharge type ionizer was used. As the corona discharge type ionizer, SJ-F035 manufactured by Keyence Corporation was used. The air volume of the ionizer (blower) was 2.5 m / s.
(Example)
A soft X-ray ionizer was used as the ionizer in the examples. A soft X-ray ionizer manufactured by Hamamatsu Electron Ltd. was used.

(Evaluation of time change of charging voltage when separator is peeled off)
About each of the comparative example and the Example, the time change of the charging voltage at the time of separator peeling was evaluated. Using a surface potentiometer, the peak voltage and static elimination time were measured. As the surface potential meter, MODEL775 manufactured by ION SYSTEM was used. The static elimination time was defined as the time from when the sample started to be charged (separator separation start) to when the sample charging voltage became +100 V (static elimination voltage). In addition, about each of the comparative example 2 and the Example, the ionizer was arrange | positioned in the position 30 cm away diagonally upward from the measurement position of the sample.

The results are shown in FIG.
FIG. 9 is a diagram showing the change over time in the charging voltage when the separator is peeled off for Comparative Example 1, Comparative Example 2, and Example. In FIG. 9, the horizontal axis represents time (seconds). The vertical axis represents the charging voltage (kV) when the separator is peeled off. The separator peeling start time was 5 seconds.
In the column of “Static removal voltage” and “Static elimination time” in “Comparative example 1” in the table, “−” is displayed because static electricity generated in the sample is not removed when the separator is peeled off.

  As a result of the evaluation, according to the soft X-ray ionizer of the example, it was confirmed that the peak voltage can be made smaller than that of the corona discharge ionizer of the comparative example 2, and the static elimination time can be shortened.

DESCRIPTION OF SYMBOLS 1 ... Film bonding system (manufacturing apparatus of an optical member bonding body), 22 ... Conveying device, 22d ... Knife edge, 23 ... Nipping roll, 31 ... 1st ionizer, 32 ... 2nd ionizer, 33 ... 1st cover, 34 ... 2nd cover, P ... Liquid crystal panel (optical display component), F ... Optical sheet, F1 ... Optical member, F3 ... Separator, P12 ... Double-sided bonding panel (optical member bonding body)

Claims (2)

It is a manufacturing apparatus of an optical member bonding body formed by bonding an optical member to an optical display component,
A transport unit that transports an optical sheet including the optical member and a separator that is detachably stacked on one surface of the optical member;
A separation unit that separates the optical member from the separator that constitutes the optical sheet conveyed from the conveyance unit, and supplies the separated optical member to a bonding position where the optical member is bonded to the optical display component. When,
A bonding unit for bonding the optical member supplied from the separation unit to the optical display component;
An ionizer that is disposed on the transport path of the optical member and that irradiates the surface of the optical member separated from the separator with soft X-rays;
Only including,
The separation part includes a knife edge that wraps the optical sheet at an acute angle and separates the optical member from the separator while supplying the optical member to the bonding position,
The laminating portion includes a pinching roll for laminating the optical member supplied from the knife edge to the optical display component supplied to the laminating position,
When the ionizer irradiates the surface of the optical member separated from the separator from the knife edge side with the soft X-ray, the soft X-ray transmitted through the optical member is irradiated onto the surface of the pinching roll. It is comprised so that it may be, The manufacturing apparatus of the optical member bonding body characterized by the above-mentioned . Wherein on the conveying path of the optical member, the optical member bonded body manufacturing apparatus according to claim 1, wherein the cover is provided for shielding the soft X-rays emitted from the ionizer.

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