JPWO2013151035A1 - Optical display device production system - Google Patents

Abstract

The optical display device production system (1) of the present invention includes an optical member sheet (FX) having a width larger than the display area (P4) of the optical display component (P) on the first surface and the second surface of the optical display component. From the sheet | seat piece each bonded to the said 1st surface and said 2nd surface of the said optical display component, respectively, the bonding part (13,15,18) which bonds the sheet piece (FXm) cut | disconnected from each other An excess portion disposed outside the opposing portion of the sheet piece corresponding to the display area is cut off, and an optical member having a size corresponding to the display area is formed on the first surface and the second surface of the optical display component. And a cutting portion (40) formed respectively.

Description

The present invention relates to an optical display device production system.
This application claims priority based on Japanese Patent Application No. 2012-084833 for which it applied to Japan on April 3, 2012, and uses the content here.

  Conventionally, in a production system for an optical display device such as a liquid crystal display, an optical member such as a polarizing plate to be bonded to a liquid crystal panel (optical display component) is formed from a long film into a sheet piece having a size matching the display area of the liquid crystal panel. After being cut out, packed and transported to another line, it may be bonded to a liquid crystal panel (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2003-255132

  However, in the above-described conventional configuration, in consideration of variation in dimensions of the liquid crystal panel and the sheet piece, and bonding variation (positional deviation) of the sheet piece to the liquid crystal panel, the sheet piece of the optical member slightly larger than the display area is used. Cut out. For this reason, an extra region (frame portion) is formed in the peripheral portion of the display region, which causes a problem that downsizing of the device is hindered.

  An object of the present invention is to provide an optical display device production system capable of reducing the frame portion around the display area to enlarge the display area and downsize the device.

  The production system for an optical display device according to the first aspect of the present invention is a production system for an optical display device, and is wider on the first surface and the second surface of the optical display component than the display area of the optical display component. The bonding part for bonding sheet pieces cut from the optical member sheet, and the sheet region bonded to the first surface and the second surface of the optical display component, respectively, corresponding to the display area. A cutting portion for cutting off an excess portion disposed outside the opposing portion of the sheet piece and forming optical members having a size corresponding to the display area on the first surface and the second surface of the optical display component, respectively; It is equipped with. The “opposite part of the sheet piece corresponding to the display area (opposite part of the display area)” in the above is an area that is not less than the size of the display area and not more than the size of the outer shape of the optical display component, and an electrical component. The area where functional parts such as attachment parts are avoided is shown. That is, in the above, the case where the excess part is laser-cut along the outer periphery of an optical display component is included.

  Based on the inspection data in the optical axis direction of the optical member sheet, the optical device includes a control device that determines a relative bonding position between the optical display component and the sheet piece, and the bonding unit is a relative bonding determined by the control device. The sheet piece may be bonded to the optical display component based on the alignment position.

  The bonding unit includes an unwinding unit that unwinds the optical member sheet together with the separator sheet from the raw roll, a cut unit that cuts the optical member sheet so as to leave the separator sheet, and obtains a sheet piece, and the sheet piece. A peeling portion for peeling the sheet piece from the separator sheet, and a bonding head for bonding the sheet piece to a holding surface and holding the sheet piece, and bonding the sheet piece held by the holding surface to the optical display component. You may have.

  The first surplus part separated from the sheet piece bonded to the first surface of the optical display component, and the first excess portion separated from the sheet piece bonded to the second surface of the optical display component. The second surplus portion may be peeled off from the optical display component together.

  The cutting part was bonded to the second surface of the optical display component, and a first cutting device for cutting off the first surplus portion from the sheet piece bonded to the first surface of the optical display component. A second cutting device for separating the second surplus portion from the sheet piece, wherein the first cutting device and the second cutting device are laser cutters, and the first cutting device and the second cutting device are The laser output device may be connected to the same laser output device, and the laser output from the laser output device may be branched and supplied to the first cutting device and the second cutting device.

  According to the above aspect of the present invention, it is possible to provide an optical display device production system that can reduce the frame portion around the display area to enlarge the display area and downsize the device.

It is a side view which shows the outline of the film bonding system which concerns on 1st embodiment of this invention. It is a top view of the liquid crystal panel as one structural example of an optical display component. It is AA sectional drawing of FIG. It is sectional drawing of an optical member sheet | seat. It is a side view which shows the outline of the bonding apparatus of a film bonding system. It is a figure which shows an example of the determination method of the bonding position of the sheet piece with respect to a liquid crystal panel. It is a figure which shows an example of the determination method of the bonding position of the sheet piece with respect to a liquid crystal panel. It is a side view which shows the cutting process of the sheet piece by a 1st cutting device. It is a side view which shows the cutting process of the sheet piece by a 2nd cutting device. It is a schematic diagram of the bonding apparatus applied to the film bonding system which concerns on 2nd embodiment of this invention. It is a schematic diagram of the bonding apparatus applied to the film bonding system which concerns on 2nd embodiment of this invention. It is a top view which shows the cutting method of the excess part of a sheet piece.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1st Embodiment of this invention demonstrates the film bonding system which comprises a part of production system as a production system of an optical display device.

[First embodiment]
Drawing 1 is a schematic structure figure of film pasting system 1 concerning a first embodiment of the present invention. The film bonding system 1 is a system for bonding a film-shaped optical member such as a polarizing film, a retardation film, or a brightness enhancement film to a panel-shaped optical display component such as a liquid crystal panel or an organic EL panel. And an optical display device including an optical member. In the film bonding system 1, the liquid crystal panel P is used as the optical display component. In FIG. 1, for convenience of illustration, the film bonding system 1 is illustrated in two upper and lower stages.

  FIG. 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, 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 conforms to the outer shape of the first substrate P1 in plan view, and has a display region P4 that is an area that fits inside the outer periphery of the liquid crystal layer P3 in plan view.

  3 is a cross-sectional view taken along the line AA in FIG. On the front surface (first surface) and back surface (second surface) of the liquid crystal panel P, the first, second, and third optical member sheets F1, F2, and F3 (see FIG. The first, second, and third optical members F11, F12, and F13 (hereinafter, sometimes collectively referred to as the optical member F1X) cut out from the sheet FX) are appropriately bonded together. In the present embodiment, the first optical member F11 and the third optical member F13 are bonded as polarizing films to both the surface facing the backlight and the surface facing the display surface of the liquid crystal panel P, respectively. On the surface of the panel P facing the backlight, the second optical member F12 is further bonded as a brightness enhancement film so as to overlap the first optical member F11.

  The first, second, and third optical members F11, F12, and F13 are first, second, and third sheet pieces F1m, F2m, and F3m, which will be described later (hereinafter may be collectively referred to as sheet pieces FXm). From this, the excess portion outside the display area of the sheet piece FXm is cut off.

  FIG. 4 is a partial cross-sectional view of the optical member sheet FX bonded to the liquid crystal panel P. The optical member sheet FX includes a film-like optical member main body F1a, an adhesive layer F2a provided on one surface (the upper surface and the first surface in FIG. 4) of the optical member main body F1a, and an optical member via the adhesive layer F2a. The separator sheet F3a is detachably stacked on one surface of the main body F1a, and the surface protection film F4a is stacked on the other surface (the lower surface and the second surface in FIG. 4) of the optical member main body F1a. The optical member body F1a functions as a polarizing plate, and is bonded over the entire display area P4 of the liquid crystal panel P and the peripheral area of the display area. For convenience of illustration, hatching of each layer in FIG. 4 is omitted.

  The optical member body F1a is bonded to the liquid crystal panel P via the adhesive layer F2a in a state where the separator sheet F3a is separated while leaving the adhesive layer F2a on one surface thereof. Hereinafter, the part remove | excluding the separator sheet F3a from the optical member sheet | seat FX is called the bonding sheet | seat F5.

  Separator sheet F3a protects adhesive layer F2a and optical member body F1a until separated from adhesive layer F2a. The surface protective film F4a is bonded to the liquid crystal panel P together with the optical member 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 body F1a to protect the optical member body F1a. The surface protective film F4a is separated from the optical member main body F1a at a predetermined timing. Note that the optical member sheet FX may not include the surface protective film F4a. Moreover, the structure by which the surface protection film F4a is not isolate | separated from the optical member main body F1a may be sufficient.

  The optical member body F1a includes a sheet-like polarizer F6, a first film F7 bonded to one surface (first surface) of the polarizer F6 with an adhesive, and the other surface (second surface) of the polarizer F6. Surface) and a second film F8 bonded with an adhesive or the like. The first film F7 and the second film F8 are protective films that protect the polarizer F6, for example.

  The optical member main body F1a may have a single layer structure composed of 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 that provides an effect such as anti-glare including hard coat treatment and anti-glare treatment for protecting the outermost surface of the liquid crystal display element. The optical member 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 sheet F3a may be bonded to one surface of the optical member body F1a via the adhesive layer F2a.

  Hereinafter, the film bonding system 1 will be described with reference to FIG. In the figure, an arrow F indicates the transport direction of the liquid crystal panel P. In the following description, the upstream of the liquid crystal panel P in the transport direction is referred to as the panel transport upstream, and the downstream of the liquid crystal panel P in the transport direction is referred to as the panel transport downstream.

  The film bonding system 1 includes a first rotary index 11, a transport device 12 that transports the liquid crystal panel P to the first rotary starting position 11 a of the first rotary index 11, and a first provided around the first rotary index 11. And the 2nd bonding apparatuses 13 and 15 and the film peeling apparatus 14, the 2nd rotary index 16 provided in the position near the panel conveyance downstream of the 1st rotary index 11, and the 1st rotary terminal position 11b of the 1st rotary index 11 A transport device 17 that transports the liquid crystal panel P to the second rotary starting position 16 a of the second rotary index 16 while reversing the front and back, and a third bonding device 18 provided around the second rotary index 16.

  Moreover, the film bonding system 1 includes a conveyor 27 provided at a position near the downstream of the panel transport of the second rotary index 16, and a liquid crystal panel from the second rotary end position 16 b of the second rotary index 16 to the first start position 27 a of the conveyor 27. A transport device 21 for transporting P; a first cutting device 41 provided on the transport path of the conveyor 27; a conveyor 28 provided at a position close to the transport downstream of the conveyor 27; A transport device 22 for transporting the liquid crystal panel P to the first departure position 28a, and a second cutting device 42 provided on the transport path of the conveyor 28.

  The 1st bonding apparatus 13, the 2nd bonding apparatus 15, and the 3rd bonding apparatus 18 are a sheet piece of the optical member sheet | seat FX larger than the display area P4 of liquid crystal panel P in each of the surface and back surface of liquid crystal panel P. The pasting means for pasting FXm is configured. Moreover, the 1st cutting device 41 and the 2nd cutting device 42 cut off the excess part arrange | positioned on the outer side of the part facing the display area P4 from the sheet piece FXm bonded to each of the surface and back surface of liquid crystal panel P. The cutting means for forming the optical member F1X having a size corresponding to the display area P4 on each of the front surface and the back surface of the liquid crystal panel P is configured.

  The film bonding system 1 sequentially performs a predetermined process on the liquid crystal panel P while transporting the liquid crystal panel P using the lines formed by the rotary indexes 11 and 16 and the conveyors 27 and 28. The liquid crystal panel P is conveyed on the line in a state where the front and back surfaces are horizontal, and a sheet piece (optical member F1X) of a bonding sheet F5 cut out from the belt-shaped optical member sheet FX to a predetermined length with respect to the front and back surfaces. Is equivalent). Each part of the film bonding system 1 is comprehensively controlled by the control device 25 as an electronic control device.

  The transport device 12 holds the liquid crystal panel P and transports it freely in the vertical and horizontal directions. For example, the transport device 12 transports the liquid crystal panel P held by suction to the first rotary starting position 11a of the first rotary index 11 in a horizontal state, releases the suction at the first rotary starting position 11a, and releases the liquid crystal panel P. Is transferred to the first rotary index 11.

  The first rotary index 11 is a disc-shaped rotary table having a rotation axis along the vertical direction, and is driven to rotate clockwise, for example, with the carry-in position from the transport device 12 as the first rotary starting position 11a. The first rotary index 11 has a first bonding position 11c at a position rotated, for example, clockwise by a predetermined angle from the first rotary starting position 11a. In this 1st bonding position 11c, the 1st sheet piece F1m is bonded by the 1st bonding apparatus 13 on the surface which faces the backlight of a liquid crystal panel. The first sheet piece F1m is a sheet piece of the first optical member sheet F1 having a size larger than the display area of the liquid crystal panel P. The 1st optical member bonding body PA1 is formed by the 1st bonding apparatus 13 bonding the 1st sheet piece F1m to either the surface of the liquid crystal panel P, or a back surface.

  The first rotary index 11 has a film peeling position 11e at a position rotated, for example, clockwise by a predetermined angle from the first bonding position 11c. In this film peeling position 11e, the surface protective film F4a of the first sheet piece F1m is peeled off by the film peeling device 14.

  The first rotary index 11 has a second bonding position 11d at a position rotated, for example, clockwise by a predetermined angle from the film peeling position 11e. The second sheet piece F2m on the backlight side is bonded by the second bonding apparatus 15 at the second bonding position 11d. The second sheet piece F2m is a sheet piece of the second optical member sheet F2 having a size larger than the display area of the liquid crystal panel P. The 2nd optical member bonding body PA2 is formed by the 2nd bonding apparatus 15 bonding the 2nd sheet piece F2m to the surface at the side of the 1st sheet piece F1m of 1st optical member bonding body PA1.

  The first rotary index 11 has a first rotary terminal position 11b at a position rotated, for example, clockwise by a predetermined angle from the second bonding position 11d. At this first rotary terminal position 11b, the second optical member bonding body PA2 by the transport device 17 is carried out.

  The conveyance apparatus 17 hold | maintains liquid crystal panel P (2nd optical member bonding body PA2), and conveys it freely in a vertical direction and a horizontal direction. The transport device 17 transports the liquid crystal panel P held, for example, by suction to the second rotary starting position 16a of the second rotary index 16, and reverses the front and back of the liquid crystal panel P during this transport, and at the second rotary starting position 16a. The suction is released and the liquid crystal panel P is transferred to the second rotary index 16.

  The second rotary index 16 is a disc-shaped rotary table having a rotation axis extending in the vertical direction, and is driven to rotate clockwise, for example, with the carry-in position from the transport device 17 as the second rotary starting position 16a. The second rotary index 16 has a third bonding position 16c at a position rotated, for example, clockwise by a predetermined angle from the second rotary starting position 16a. In this 3rd bonding position 16c, the 3rd sheet piece F3m is bonded to the surface which has faced the display surface by the 3rd bonding apparatus 18. FIG. The third sheet piece F3m is a sheet piece of the third optical member sheet F3 having a size larger than the display area of the liquid crystal panel P. The other surface of the front surface or the back surface of the liquid crystal panel P by the third bonding device 18 (the surface opposite to the surface on which the first sheet piece F1m and the second sheet piece F2m of the second optical member bonding body PA2 are bonded). By bonding the third sheet piece F3m to the third optical member bonding body PA3, the third optical member bonding body PA3 is formed.

  The second rotary index 16 has a second rotary terminal position 16b at a position rotated, for example, clockwise by a predetermined angle from the third bonding position 16c. The third optical member bonding body PA3 is carried out by the transport device 21 at the second rotary terminal position 16b.

  The conveying device 21 holds the liquid crystal panel P (third optical member bonding body PA3) and conveys it freely in the vertical direction and the horizontal direction. For example, the transport device 21 transports the liquid crystal panel P held by suction to the initial position 27 a of the conveyor 27, releases the suction at the initial position 27 a, and delivers the liquid crystal panel P to the conveyor 27.

  A first cutting position 27 b is set on the conveyance path after the initial departure position 27 a of the conveyor 27. The third sheet piece F3m is cut by the first cutting device 41 at the first cutting position 27b. The 1st cutting device 41 cuts off the surplus part (1st surplus part) arrange | positioned outside the part facing the display area of liquid crystal panel P from the 3rd sheet piece F3m bonded by liquid crystal panel P, and liquid crystal An optical member (third optical member F13) having a size corresponding to the display area of the panel P is formed.

  The third optical member F13 is bonded to the other surface of the front surface or the back surface of the liquid crystal panel P by separating the excess portion of the third sheet piece F3m from the third optical member bonding body PA3 by the first cutting device 41. And 4th optical member bonding body PA4 by which the 1st sheet piece F1m and the 2nd sheet piece F2m were bonded to one surface among the surface or the back surface of liquid crystal panel P is formed. The surplus part cut off from the third sheet piece F3m is peeled off and collected from the liquid crystal panel P by a peeling device (not shown).

  The conveyance device 22 holds the liquid crystal panel P (fourth optical member bonding body PA4) and conveys it freely in the vertical direction and the horizontal direction. For example, the transport device 22 transports the liquid crystal panel P held by suction to the initial position 28 a of the conveyor 28, releases the suction at the initial position 28 a, and delivers the liquid crystal panel P to the conveyor 28.

  A second cutting position 28 b is set on the conveyance path after the initial position 28 a of the conveyor 28. At the second cutting position 28b, the first sheet piece F1m and the second sheet piece F2m are cut by the second cutting device 42. The 2nd cutting device 42 is the surplus part (2nd) arrange | positioned on the outer side of the part which opposes the display area of liquid crystal panel P from each of the 1st sheet piece F1m bonded to liquid crystal panel P, and the 2nd sheet piece F2m. The first optical member F11 composed of the first optical member sheet F1 and the second optical member F12 composed of the second optical member sheet F2 correspond to the display area of the liquid crystal panel P. An optical member having a size to be formed is formed.

  By bonding the first sheet piece F1m and the second sheet piece F2m to the liquid crystal panel P and then cutting them together, the first optical member F11 and the second optical member F12 are not misaligned, and the outside of the display area P4. The first optical member F11 and the second optical member F12 that match the shape of the periphery are obtained. Moreover, the cutting process of the 1st sheet piece F1m and the 2nd sheet piece F2m is also simplified.

  The second cutting device 42 cuts off the excess portions of the first sheet piece F1m and the second sheet piece F2m from the fourth optical member bonding body PA4, whereby the first or second surface of the liquid crystal panel P is placed on the first surface. The 5th optical member bonding body in which the optical member F11 and the 2nd optical member F12 were bonded, and the 3rd optical member F13 was bonded to the other surface of the surface or back surface of liquid crystal panel P is formed. The surplus part cut off from the first sheet piece FX1 and the second sheet piece F2m is peeled off and collected from the liquid crystal panel P by a peeling device (not shown).

Here, the first cutting device 41 and second cutting device 42 is, for example, CO ₂ laser cutter. The 1st cutting device 41 and the 2nd cutting device 42 cut | disconnect endlessly the sheet piece FXm bonded by liquid crystal panel P along the outer periphery of the display area P4. The first cutting device 41 and the second cutting device 42 are connected to the same laser output device 43. The first cutting device 41, the second cutting device 42, and the laser output device 43 separate a surplus portion disposed outside the portion facing the display region P4 from the sheet piece FXm, and have a size corresponding to the display region P4. A cutting means 40 for forming the optical member FX is configured. Since the laser output required for cutting each of the sheet pieces F1m, F2m, and F3m is not so large, in the present embodiment, the high-power laser beam output from the laser output device 43 is branched into two and the first cutting device. 41 and the second cutting device 42.

  An unillustrated bonding inspection position is installed on the transport path of the liquid crystal panel P (fifth optical member bonding body) after the second cutting position 28b, and a film is bonded at this bonding inspection position. The workpiece (liquid crystal panel P) is inspected by an inspection device (not shown) (inspection of whether or not the position of the optical member F1X is appropriate (whether the positional deviation is within the tolerance range)). The work determined that the position of the optical member F1X with respect to the liquid crystal panel P is not appropriate is discharged out of the system by a not-shown discharging means.

  With the above, the bonding process by the film bonding system 1 is completed.

  Hereinafter, the detail of the 1st bonding apparatus 13 is demonstrated with reference to FIG. In addition, since the 2nd and 3rd bonding apparatuses 15 and 18 also have the same structure, detailed description is abbreviate | omitted.

  The 1st bonding apparatus 13 is a sheet piece (1st of the bonding sheets F5 cut into the predetermined size in the 1st optical member sheet | seat F1 with respect to the upper surface of liquid crystal panel P conveyed to the 1st bonding position 11c. Sheet piece F1m) is bonded.

  The 1st bonding apparatus 13 is a sheet | seat which conveys the 1st optical member sheet | seat F1 along the longitudinal direction, unwinding the 1st optical member sheet | seat F1 from the original fabric roll R1 in which the 1st optical member sheet | seat F1 was wound. The conveyance device 31 and the sheet conveyance device 31 hold the sheet piece (first sheet piece F1m) of the bonding sheet F5 cut out from the first optical member sheet F1, and the sheet piece is conveyed to the first bonding position 11c. And a bonding head 32 for bonding to the upper surface of the liquid crystal panel P.

  The sheet conveying apparatus 31 conveys the bonding sheet F5 using the separator sheet F3a as a carrier, holds the raw fabric roll R1 around which the first optical member sheet F1 is wound, and the first optical member sheet F1 in the longitudinal direction. The unwinding portion 31a that is unrolled along the cut, the cut portion 31b that is half-cut to the first optical member sheet F1 that is unwound from the original roll R1, and the first optical member sheet F1 that is half-cut is wound at an acute angle. It has a knife edge (peeling part) 31c that separates the bonding sheet F5 from the separator sheet F3a, and a winding part 31d that holds a separator roll R2 that winds up the separator sheet F3a that has become independent through the knife edge 31c.

  In addition, although illustration is abbreviate | omitted, the sheet conveying apparatus 31 has a some guide roller which winds the 1st optical member sheet | seat F1 along a predetermined conveyance path | route. The first optical member sheet F1 has a width of the display area P4 of the liquid crystal panel P (a long side or a short side of the display area P4 in the horizontal direction (sheet width direction) orthogonal to the conveyance direction. In this embodiment, the width is wider than the long side length of the display area P4.

  The unwinding unit 31a positioned at the starting point of the sheet conveying device 31 and the winding unit 31d positioned at the ending point of the sheet conveying device 31 are driven in synchronization with each other, for example. Thereby, the winding-up part 31d winds up the separator sheet F3a which passed through the knife edge 31c, while the unwinding part 31a delivers the 1st optical member sheet | seat F1 to the conveyance direction. Hereinafter, the upstream in the conveyance direction of the first optical member sheet F1 (separator sheet F3a) in the sheet conveyance device 31 is referred to as upstream of sheet conveyance, and the downstream in the conveyance direction is referred to as downstream of sheet conveyance.

  The cut portion 31b has a length of the display region P4 (the length of the other side of the long side and the short side of the display region P4) in the length direction in which the first optical member sheet F1 is orthogonal to the sheet width direction. In this embodiment, each time a length longer than the short side length of the display region P4 is extended, a part in the thickness direction of the first optical member sheet F1 is formed over the entire width along the sheet width direction. Cut (half cut). Thereby, the sheet piece (1st sheet piece F1m) of the bonding sheet | seat F5 larger than the display area P4 of liquid crystal panel P is cut out from the 1st optical member sheet | seat F1.

  The cut part 31b is cut so that the first optical member sheet F1 (separator sheet F3a) is not broken by the tension acting during the conveyance of the first optical member sheet F1 (so that a predetermined thickness remains on the separator sheet F3a). The advancing / retreating position of the blade is adjusted, and the half cut is performed to the vicinity of the interface between the adhesive layer F2a and the separator sheet F3a. In addition, you may use the laser apparatus replaced with a cutting blade.

  The first optical member sheet F1 after the half cut is cut along the entire width in the sheet width direction of the first optical member sheet F1 by cutting the optical member body F1a and the surface protection film F4a in the thickness direction. Is formed. The first optical member sheet F1 is divided into sections having a length corresponding to the short side length of the display region P4 in the longitudinal direction by the cut line. Each section is one sheet piece (first sheet piece F1m) in the bonding sheet F5.

  The knife edge 31c wraps the first optical member sheet F1 at an acute angle at its acute-angled tip. When the first optical member sheet F1 is folded at an acute angle at the tip of the knife edge 31c, the separator sheet F3a is peeled from the first sheet piece F1m. At this time, the adhesive layer F2a (bonding surface with the liquid crystal panel P) of the first sheet piece F1m faces downward. Immediately above the tip of the knife edge 31c is a separator peeling position 31e. When the arc-shaped holding surface 32a of the bonding head 32 is in contact with the tip of the knife edge 31c from above, the surface protective film F4a (the surface opposite to the bonding surface) of the first sheet piece F1m is bonded to the bonding head. Attached to 32 holding surfaces 32a.

  The bonding head 32 has an arc-shaped holding surface 32a that is parallel to the sheet width direction and protrudes downward. The holding surface 32a has, for example, a weaker bonding force than the bonding surface (adhesive layer F2a) of the bonding sheet F5, and allows the surface protective film F4a of the first sheet piece F1m to be repeatedly bonded and peeled.

  The bonding head 32 is tilted above the knife edge 31c so as to be parallel to the length direction and follow the curvature of the holding surface 32a, with an axis along the sheet width direction as a center. The bonding head 32 is appropriately tilted when the first sheet piece F1m is bonded and held, and when the first sheet piece F1m bonded and held is bonded to the liquid crystal panel P.

  The bonding head 32 has the holding surface 32a facing downward, and the curved end of the holding surface 32a is tilted so that the curved end of the holding surface 32a (right side in FIG. 5) faces down. The top end of the first sheet piece F1m located at the separator peeling position 31e is adhered to the holding surface 32a. Then, the whole 1st sheet piece F1m is stuck by the holding surface 32a by tilting the bonding head 32, paying out the 1st sheet piece F1m.

  The bonding head 32 can move up and down by a predetermined amount above the separator peeling position 31e and the first bonding position 11c, and can be appropriately moved between the separator peeling position 31e and the first bonding position 11c. The laminating head 32 is connected to a driving device 33 that enables driving when moving up and down, moving, and tilting.

  When bonding the first sheet piece F1m to the holding surface 32a, for example, the bonding head 32 cuts the engagement with the driving device 33 after the tip of the first sheet piece F1m is bonded to the holding surface 32a. In this state, the first sheet piece F1m is passively tilted. When the bonding head 32 tilts until the entire first sheet piece F1m is adhered to the holding surface 32a, the tilting is locked by, for example, engaging the driving device 33 in this inclined posture, and the first bonding is performed in this state. It moves above the alignment position 11c.

  When bonding the first sheet piece F1m bonded and held to the liquid crystal panel P, the bonding head 32 is actively tilted, for example, by the operation of the driving device 33, and the liquid crystal panel along the curve of the holding surface 32a. The 1st sheet piece F1m is pressed on the upper surface of P, and it bonds together reliably.

  Below the front end portion of the knife edge 31c, a first detection camera 34 that detects the front end of the front end portion of the knife edge 31c near the downstream side of the sheet conveyance is provided. Detection information of the first detection camera 34 is sent to the control device 25. For example, when the first detection camera 34 detects the end close to the downstream side of the bonding sheet F5, the control device 25 temporarily stops the sheet conveying device 31, and then lowers the bonding head 32 to hold the holding surface 32a. The tip part of the bonding sheet F5 is adhered to.

  When the first detection camera 34 detects the end close to the downstream side of the bonding sheet F5 and stops the sheet conveying device 31 once, the control device 25 performs the cutting of the bonding sheet F5 by the cut portion 31b. That is, the distance along the sheet conveyance path between the detection position by the first detection camera 34 (the optical axis extension position of the first detection camera 34) and the cut position by the cut portion 31b (the cutting blade advance / retreat position of the cut portion 31b). This corresponds to the length of the sheet piece (first sheet piece F1m) of the bonding sheet F5.

  The cut unit 31b is movable along the sheet conveyance path, and the distance along the sheet conveyance path between the detection position by the first detection camera 34 and the cut position by the cut unit 31b is changed by the movement. The movement of the cut part 31b is controlled by the control device 25. For example, after unwinding the sheet piece (first sheet piece F1m) of the bonding sheet F5 after cutting the bonding sheet F5 by the cutting part 31b, When the cut end deviates from a predetermined reference position, this shift is corrected by the movement of the cut portion 31b. In addition, it can respond also to the cutting of the bonding sheet | seat F5 from which length differs by the movement of the cut part 31b.

  The 1st detection camera 34 also detects the fault mark marked on the bonding sheet | seat F5. The defect mark is marked by an inkjet or the like from the surface protective film F4a side at the defect point found on the first optical member sheet F1 when the raw roll R1 is manufactured. The bonding sheet F5 in which this defect mark was detected (the first sheet piece F1m including the defect) was bonded to the bonding head 32 and then not bonded to the liquid crystal panel P, and the first bonding position 11c was avoided. Move to the disposal position (disposal position) and paste it on the waste material sheet. In addition, when the defect mark is detected, there may be a step of cutting and pasting the portion including the defect of the bonding sheet F5 with the minimum width.

  Note that the disadvantage of the optical member sheet FX is, for example, a portion where a foreign substance composed of at least one of solid, liquid, and gas is present inside the optical member sheet FX, and unevenness or scratches on the surface of the optical member sheet FX. , A portion that becomes a bright spot due to distortion of the optical member sheet FX, material deviation, or the like.

  When the bonding head 32 moves from the separator peeling position 31e to the first bonding position 11c, a pair of corner portions of the proximal end portion, for example, the distal end portion of the first sheet piece F1m bonded and held on the holding surface 32a is a pair. The second detection camera 35 takes an image. Detection information of each second detection camera 35 is sent to the control device 25. For example, based on the imaging data of each second detection camera 35, the control device 25 is configured so that the horizontal direction of the first sheet piece F <b> 1 m with respect to the bonding head 32 (the moving direction of the bonding head 32 and its orthogonal direction and the rotation direction about the vertical axis). ) Position. When there is a shift in the relative position between the bonding head 32 and the first sheet piece F1m, the bonding head 32 performs alignment so that the position of the first sheet piece F1m is a predetermined reference position.

  The first bonding position 11c of the first rotary index 11 is provided with a pair of third detection cameras 36 for performing horizontal alignment of the liquid crystal panel P on the first bonding position 11c. The second bonding position 11d of the first rotary index 11 is provided with a pair of fourth detection cameras (not shown) for performing horizontal alignment of the liquid crystal panel P on the second bonding position 11d, Similarly, a pair of fifth detection cameras (not shown) are provided at the third bonding position 16c of the second rotary index 16 to perform horizontal alignment of the liquid crystal panel P on the third bonding position 16c. Detection information of each detection camera is sent to the control device 25. It is also possible to use a sensor instead of each detection camera.

On each of the rotary indexes 11 and 16, an alignment table 39 is provided that mounts the liquid crystal panel P and enables alignment in the horizontal direction of the liquid crystal panel P. The alignment table 39 is driven and controlled by the control device 25 based on the detection information of each detection camera.
Thereby, the liquid crystal panel P with respect to each rotary index 11 and 16 (each bonding position 11c, 11d, 16c) is aligned.

  By bonding the bonding sheet F5 (sheet piece FXm) aligned by the bonding head 32 to the liquid crystal panel P, the bonding variation of the optical member F1X is suppressed, and the optical member F1X with respect to the liquid crystal panel P is suppressed. The accuracy in the optical axis direction is improved, and the clarity and contrast of the optical display device are increased.

  Here, the polarizer film constituting the optical member sheet FX is formed, for example, by uniaxially stretching a PVA film dyed with a dichroic dye. Due to unevenness in the thickness of the PVA film during stretching, unevenness in dyeing of the dichroic dye, and the like, there may be variations in the optical axis direction in the plane of the optical member sheet FX.

  Therefore, in the present embodiment, the control device 25 uses the liquid crystal panel for the optical member sheet FX based on the inspection data of the in-plane distribution of the optical axis in each part of the optical member sheet FX stored in advance in the storage device 24 (see FIG. 1). P bonding position (relative bonding position) is determined. And each bonding apparatus 13,15,18 aligns liquid crystal panel P with respect to the sheet piece FXm cut out from the optical member sheet | seat FX according to this bonding position, and bonds liquid crystal panel P to the sheet piece FXm. To do.

  The determination method of the bonding position (relative bonding position) of the sheet piece FXm with respect to liquid crystal panel P is as follows, for example.

  First, as shown in FIG. 6A, a plurality of inspection points CP are set in the width direction of the optical member sheet FX, and the direction of the optical axis of the optical member sheet FX is detected at each inspection point CP. The timing for detecting the optical axis may be at the time of manufacturing the original fabric roll R1, or may be during the half cut by unwinding the optical member sheet FX from the original fabric roll R1. Data in the optical axis direction of the optical member sheet FX is stored in the storage device 24 (see FIG. 1) in association with the position of the optical member sheet FX (position in the longitudinal direction and position in the width direction of the optical member sheet FX). .

  The control device 25 acquires the optical axis data (inspection data of the in-plane distribution of the optical axis) of each inspection point CP from the storage device 24, and the optical member sheet FX (cut line CL) of the portion from which the sheet piece FXm is cut out. The direction of the average optical axis of the area defined by (1) is detected.

  For example, as shown in FIG. 6B, an angle (deviation angle) formed between the direction of the optical axis and the edge line EL of the optical member sheet FX is detected for each inspection point CP, and the largest of the deviation angles (maximum deviation). Angle) is defined as θmax, and when the smallest angle (minimum deviation angle) is defined as θmin, an average value θmid (= (θmax + θmin) / 2) of the maximum deviation angle θmax and the minimum deviation angle θmin is defined as the average deviation angle. Detect as. Then, the direction in which the average deviation angle θmid is formed with respect to the edge line EL of the optical member sheet FX is detected as the direction of the average optical axis of the optical member sheet FX. The deviation angle is calculated, for example, with the counterclockwise direction being positive with respect to the edge line EL of the optical member sheet FX and the clockwise direction being negative.

  Then, the direction of the average optical axis of the optical member 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. The bonding position (relative bonding position) of the sheet piece FXm with respect to P is determined. For example, when the direction of the optical axis of the optical member F1X is set to a direction that forms 90 ° with respect to the long side or the short side of the display region P4 according to the design specifications, the average optical property of the optical member sheet FX is set. The sheet piece FXm is bonded to the liquid crystal panel P so that the direction of the axis is 90 ° with respect to the long side or the short side of the display region P4.

As shown in FIGS. 7 and 8, the cutting devices 41 and 42 detect the outer peripheral edge of the display area P4 of the liquid crystal panel P with detection means such as cameras 41a and 42a, and are sheet pieces bonded to the liquid crystal panel P. FXm is cut endlessly along the outer periphery of the display area P4. The outer peripheral edge of the display area P4 is detected by imaging the edge of the liquid crystal panel P, the alignment mark provided on the liquid crystal panel P, or the outermost edge of the black matrix provided in the display area P4.
Outside the display area P4, a frame part G having a predetermined width for arranging a sealant or the like for joining the first and second substrates of the liquid crystal panel P is provided. The cutting device 41 is within the width of the frame part G. , 42 cut the sheet piece FXm (cut line: WCL, see FIG. 6B).

  As described above, the film bonding system 1 according to the first embodiment of the present invention is a sheet piece FXm of the optical member sheet FX larger than the display area P4 of the liquid crystal panel P on each of the front surface and the back surface of the liquid crystal panel P. The surplus part arrange | positioned on the outer side of the part which opposes the display area P4 from the sheet | seat piece FXm bonded to each of the bonding apparatus 13,15,18 which pastes, and each of the surface of the liquid crystal panel P, and the back surface, Cutting devices 41 and 42 for forming an optical member F1X having a size corresponding to the display region P4 on the front surface and the back surface of the liquid crystal panel P, respectively. Therefore, the optical member F1X can be accurately provided up to the display area P4, and the frame portion G (see FIG. 3) outside the display area P4 can be narrowed to enlarge the display area and downsize the device.

  Moreover, the said film bonding system 1 is provided with the control apparatus 25 which determines the relative bonding position of liquid crystal panel P and the sheet piece FXm based on the test | inspection data of the optical axis direction of the optical member sheet | seat FX, and the bonding apparatus 13 , 15, and 18 bond the sheet piece FXm to the liquid crystal panel P based on the relative bonding position determined by the control device 25. Therefore, even when there is variation in the optical axis direction in the plane of the optical member sheet FX, the relative bonding position between the sheet piece FXm and the liquid crystal panel P is appropriately adjusted according to the variation in the optical axis direction. Can do. Thereby, the precision of the optical axis direction of the optical member F1X with respect to the liquid crystal panel P can be improved, and the clarity and contrast of an optical display device can be improved.

  Moreover, in the said film bonding system 1, the bonding apparatuses 13, 15, and 18 are the unwinding part 31a which unwinds the optical member sheet | seat FX with the separator sheet | seat F3a from the original fabric roll R1, and the optical member sheet | seat FX separator sheet | seat F3a. The cut portion 31b to be the sheet piece FXm, the knife edge 31c for peeling the sheet piece FXm from the separator sheet F3a, and the sheet piece FXm are attached to and held on the holding surface 32a and held on the holding surface 32a. And a bonding head 32 for bonding the sheet piece FXm to the liquid crystal panel P. Therefore, continuous bonding of the sheet pieces FXm becomes easy, and the production efficiency of the optical display device can be increased. Further, since the bonding head 32 having the arc-shaped holding surface 32a is used, the sheet piece FXm can be smoothly held by the tilting of the arc-shaped holding surface 32a, and the sheet is also tilted by the arc-shaped holding surface 32a. The piece FXm can be reliably bonded to the liquid crystal panel P.

  In the film bonding system 1, the first cutting device 41 and the second cutting device 42 are laser cutters, and the first cutting device 41 and the second cutting device 42 are connected to the same laser output device 40. The laser output from the laser output device 40 is branched and supplied to the first cutting device 41 and the second cutting device 42. Therefore, compared with the case where a separate laser output device is connected to each of the first cutting device 41 and the second cutting device 42, the production system of the optical display device can be downsized.

[Second Embodiment]
Drawing 9A and Drawing 9B are mimetic diagrams of a pasting device applied to a film pasting system concerning a second embodiment of the present invention.
9A is a diagram illustrating a state in which the sheet piece FXm is held by the bonding head 60, and FIG. 9B is a diagram illustrating a state in which the sheet piece FXm is bonded to the liquid crystal panel P.

  In this embodiment, the difference from the first embodiment is that the bonding apparatus according to the first embodiment uses a bonding head 32 having an arc-shaped holding surface 32a, whereas the bonding apparatus according to the present embodiment. Is the point which uses the bonding head 60 which has the planar holding surface 60a. Therefore, it demonstrates centering around the structure of the bonding head 60 here, about the component which is common in 1st embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  The bonding apparatus according to the present embodiment includes a bonding head 60, a bonding roller 62, a guide bar 61 that supports the bonding head 60 and the bonding roller 62, and the guide bar 61 tilted with respect to the liquid crystal panel P. And a driving device 63 that horizontally moves in the state of being moved. Although not shown, the bonding apparatus of the present embodiment has an unwinding part, a cutting part and a knife edge (peeling part) similar to the unwinding part, the cutting part and the knife edge (peeling part) shown in FIG. Is provided.

  The bonding head 60 has a flat holding surface 60a that holds the sheet piece FXm peeled from the separator sheet. The holding surface 60a is inclined with respect to the liquid crystal panel P when the guide bar 61 is inclined. The sheet piece FXm is positioned such that one end thereof protrudes outside the holding surface 60a and is adsorbed to the holding surface 60a. Since the suction force of the sheet piece FXm is weak, the sheet piece FXm can be moved in the horizontal direction while sliding on the holding surface 60a while being held by the holding surface 60a.

  The laminating roller 62 is disposed on the side of the laminating head 60 and presses and sticks the sheet piece FXm protruding from the holding surface 60a of the laminating head 60 to the liquid crystal panel P. When the guide bar 61 is moved in the horizontal direction by the driving device 63 in this state, the bonding head 60 and the bonding roller 62 are moved to the sheet piece FXm in a state where the one end of the sheet piece FXm is bonded to the liquid crystal panel P. It moves horizontally from the one end to the other end. Thereby, the sheet piece FXm is gradually bonded to the liquid crystal panel P from the one end by the bonding roller 62.

  The bonding head 60 aligns the sheet pieces FXm held on the holding surface 60a in the horizontal direction in the head moving direction, in the orthogonal direction, and in the rotating direction. As in the first embodiment, the bonding position (relative bonding position) between the sheet piece FXm and the liquid crystal panel P is controlled based on the inspection data in the optical axis direction of the optical member sheet FX (see FIG. 1). Will be determined. The bonding head 60 bonds the sheet piece FXm held on the holding surface 60a to the liquid crystal panel P based on the relative bonding position determined by the control device 25.

  Therefore, also in the present embodiment, it is possible to provide an optical display device production system that can reduce the frame portion around the display area to enlarge the display area and downsize the device.

[First variant]
In the above embodiment, the CO ₂ laser is used as an example of the cutting devices 41 and 42, but the cutting devices 41 and 42 are not limited to the CO ₂ laser. Other cutting means such as a cutting blade can be used as the cutting devices 41 and 42.

  For example, as shown in FIG. 10, the first substrate P1 has three sides of the outer periphery thereof along the corresponding three sides of the second substrate P2, and the other side of the outer periphery is a corresponding side of the second substrate P2. In the case where the second substrate P2 is formed so as to protrude outward, the size of the second substrate P2 substantially coincides with the size of the display region P4. For this reason, if the cutting blade is moved along the outer periphery of the second substrate P2, the sheet piece F3m bonded to the second substrate P2 can be formed as the optical member F13 having a size corresponding to the display region P4. it can.

  In this case, the surplus portion of the sheet piece F3m has almost no portion to be bonded to the liquid crystal panel P on the surface, and the optical member F13 and the surplus portion around the optical member F13 are bonded only by the adhesive force of the adhesive layer F2a. Therefore, the apparatus for peeling off and recovering the surplus portion of the sheet piece F3m from the liquid crystal panel P may have a simple configuration by simply pinching and pulling the end portion of the surplus portion, thereby simplifying the apparatus configuration. Moreover, in the said embodiment, although the excess part of the sheet piece F1m and F2m and the excess part of the sheet piece F3m were peeled off and collect | recovered from the liquid crystal panel P by the separate process, collection | recovery of the excess part of the sheet piece F3m is very easy. Therefore, when the excess portions of the sheet pieces F1m and F2m are peeled off and collected from the liquid crystal panel P, the surplus portions of the sheet pieces F3m can be peeled from the liquid crystal panel P and collected together. In that case, since it is not necessary to provide the surplus part peeling apparatus in two places, the production system of an optical display device can be reduced in size.

[Second variation]
In the said embodiment, the method of using the direction of the average optical axis in the surface of the optical member sheet | seat FX as a determination method of the bonding position (relative bonding position) of the sheet piece FXm with respect to liquid crystal panel P was demonstrated. In the above embodiment, when the average value θmid of the in-plane maximum deviation angle θmax and the minimum deviation angle θmin is defined as the average deviation angle, the average deviation angle with respect to the edge line of the optical member sheet FX. Although the direction in which θmid is formed is detected as the average optical axis direction in the plane of the optical member sheet FX, the method for detecting the average optical axis direction in the plane of the optical member sheet FX is not limited to this method. .

  For example, one or a plurality of inspection points CP are selected from a plurality of inspection points CP (see FIG. 6A) set in the width direction of the optical member sheet FX, and the direction of the optical axis is selected for each selected inspection point CP. And the angle (deviation angle) formed by the edge line EL of the optical member sheet FX is detected. Then, the average value of the deviation angles in the optical axis direction of the selected one or more inspection points CP is detected as an average deviation angle, and the direction in which the average deviation angle is formed with respect to the edge line EL of the optical member sheet FX is determined. You may detect as the direction of the average optical axis of the optical member sheet | seat FX.

[Third variant]
In the said embodiment, although the method using the bonding heads 32 and 60 was demonstrated as a method of bonding the sheet piece FXm to liquid crystal panel P, this invention is not limited to this method. You may use the method of bonding the sheet | seat piece FXm peeled from the separator sheet F3a with the knife edge 31c directly to liquid crystal panel P with a bonding roll etc., without passing through the bonding heads 32 and 60.
In the above embodiment of the present invention, the case where the surface of the liquid crystal panel P is the first surface and the back surface is the second surface has been described, but the surface of the liquid crystal panel P is the second surface and the back surface is It may be the first surface.

DESCRIPTION OF SYMBOLS 1 ... Film bonding system (production system of an optical display device), 13 ... 1st bonding apparatus (bonding part), 15 ... 2nd bonding apparatus (bonding part), 18 ... 3rd bonding apparatus (bonding) 25) Controller, 31 ... Sheet conveying device, 31a ... Unwinding part, 31b ... Cut part, 31c ... Knife edge (peeling part), 32 ... Pasting head, 32a ... Holding surface, 40 ... Cutting part , 41 ... 1st cutting device (cutting part), 42 ... 2nd cutting device (cutting means part), 43 ... Laser output device, 60 ... Pasting head, 60a ... Holding surface, P ... Liquid crystal panel (optical display component) , P4 ... display area, F1 ... first optical member sheet (optical member sheet), F2 ... second optical member sheet (optical member sheet), F3 ... third optical member sheet (optical member sheet), FX ... optical member sheet F3a: Separator sheet, F11: No. Optical member (optical member), F12 ... second optical member (optical member), F13 ... third optical member (optical member), F1X ... optical member, F1m ... first sheet piece, F2m ... second sheet piece, F3m ... Third sheet piece, FXm ... sheet piece, R1 ... raw roll

Claims (5)

An optical display device production system,
Bonding portions for respectively bonding sheet pieces cut from the optical member sheet having a larger width than the display area of the optical display component on the first surface and the second surface of the optical display component;
The display area is cut off from the sheet piece bonded to the first surface and the second surface of the optical display component, respectively, and the surplus portion disposed outside the facing portion of the sheet piece corresponding to the display area is separated. The optical display device production system further comprising: a cutting portion that forms an optical member having a size corresponding to the first and second surfaces of the optical display component.   Based on the inspection data in the optical axis direction of the optical member sheet, the optical device includes a control device that determines a relative bonding position between the optical display component and the sheet piece, and the bonding unit is a relative bonding determined by the control device. The production system for an optical display device according to claim 1, wherein the sheet piece is bonded to the optical display component based on a fitting position.   The bonding unit includes an unwinding unit that unwinds the optical member sheet together with the separator sheet from the raw roll, a cut unit that cuts the optical member sheet so as to leave the separator sheet, and obtains a sheet piece, and the sheet piece. And a peeling part for peeling the sheet piece from the separator sheet, and a sheet for holding the sheet piece by sticking the sheet piece to a holding surface, and affixing the sheet piece held by the holding surface to the optical display component The production system for an optical display device according to claim 1, further comprising: a combined head.   The first surplus part separated from the sheet piece bonded to the first surface of the optical display component, and the first excess portion separated from the sheet piece bonded to the second surface of the optical display component. The production system of the optical display device according to any one of claims 1 to 3, wherein two surplus portions are collectively peeled from the optical display component.   The cutting part was bonded to the second surface of the optical display component, and a first cutting device for cutting off the first surplus portion from the sheet piece bonded to the first surface of the optical display component. A second cutting device for separating the second surplus portion from the sheet piece, wherein the first cutting device and the second cutting device are laser cutters, and the first cutting device and the second cutting device are The laser output device is connected to the same laser output device, and the laser output from the laser output device is branched and supplied to the first cutting device and the second cutting device. The production system of the optical display device described in 1.

Images