JP2006039238A - Sticking device for functional film such as polarizing plate and ar film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sticking device for a functional film such as a polarizing plate, an AR film, etc., that prevents the functional film from scratching a protection film and air from being present between the functional film and a flat panel substrate. <P>SOLUTION: A suction table 100 is provided with a slide sucking means 101 sucked to the functional film 2 to apply back tension to the functional film 2 when the functional film 2 is fed to move so that the slide sucking means 101 is freely movable in the feed moving direction of the functional film 2, the rear end side of the functional film 2 in the feed moving direction is sucked to the slide sucking means 101, and the functional film 2 is stuck on the flat panel substrate 1 while the back tension is applied to the functional film 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sticking device for sticking a functional film to a flat panel substrate, for example, a sticking device for sticking a polarizing plate to a liquid crystal cell substrate or an AR film to a plasma display substrate. .

  For example, as shown in the cross-sectional view of FIG. 4, the color liquid crystal display has polarizing plates 2 on both sides of the liquid crystal cell substrate 1 made of a glass substrate with a liquid crystal, a light distribution film, a transparent electrode, a color filter and the like sandwiched therebetween. 3 is affixed. For example, as shown in FIG. 5, the polarizing plate pasting step is performed by first disposing the polarizing plate 2 on the surface side (first main surface side) of the liquid crystal cell substrate 1 and covering the surface side of the polarizing plate 2. The release film (separator) 2a is peeled off to expose the adhesive layer. That is, the polarizing plate 2 is adsorbed on the suction table 300, the strip-shaped release tape 150 is attached to the release film 2a, and the release film 150 is lifted to peel the release film 2a from the polarizing plate 2.

  Next, for example, as shown in FIG. 6, one end side of the suction table 300 is tilted up toward the liquid crystal cell substrate 1, and the liquid crystal cell substrate 1 and the polarizing plate 2 are sandwiched between the pasting rollers 5 and 5 and moved. The polarizing plate 2 is stuck on the surface side (first main surface side) of the liquid crystal cell substrate 1 while being adhered. Thereafter, the liquid crystal cell substrate 1 is inverted, and the polarizing plate 2 is similarly attached to the back surface side (second main surface side). The structure of the polarizing plate sticking apparatus provided with the suction table which adsorb | sucks such a polarizing plate has already been disclosed (for example, refer patent document 1).

  A specific configuration of the suction table 300 is shown in FIGS. 7 and 8, for example. 7 is a plan view of the suction table 300, and FIG. 8 is a sectional view taken along line VII-VII in FIG. The suction table 300 is provided with a first suction area and a second suction area, and a plurality of suction cups 301 and 302 are provided in the first suction area and the second suction area, respectively. First and second vacuum pumps 401 and 402 are connected to 302, respectively.

  The first suction area is used for causing the suction table 300 to suck the polarizing plate 2 when the release film 2 a is peeled off from the polarizing plate 2. The second suction area sucks and holds (weakly adsorbs) the polarizing plate 2 in a slidable state with respect to the suction table 300 when the polarizing plate 2 is brought into close contact with the surface of the liquid crystal cell substrate 1 (see FIG. 6). Used for. Accordingly, the vacuum suction force in the second suction region is set to be weaker than the vacuum suction force in the first suction region.

JP 2003-172911 A

  By the way, although the protective film (illustration omitted) is adhere | attached on the back surface side of the polarizing plate 2 so that peeling is possible, the polarizing plate 2 is affixed on the liquid crystal cell substrate 1 in the conventional polarizing plate sticking process as mentioned above. At this time, the back side of the polarizing plate 2 is moved while being weakly adsorbed to the suction cup 302 in the second suction region, so that there is a problem that the protective film is easily scratched by contact with the suction cup 302. When the protective film is scratched, it is detected in the inspection process, and the color liquid crystal display that is formed at a corner is defective and discarded.

  Further, in the first suction area, when the release film 2a is peeled off from the polarizing plate 2, the suction plates 301 are strongly sucked by the respective suction cups 301. Since the restriction of the polarizing plate 2 is released by leaking, when the polarizing plate 2 is curled, the curling is not corrected and the polarizing plate 2 is attached to the liquid crystal cell substrate 1 as it is. There is a problem that it is easy to entrain air between the liquid crystal cell substrate 1 and the liquid crystal cell substrate 1. Once the air is caught between the polarizing plate 2 and the liquid crystal cell substrate 1, it cannot be corrected and becomes a defective product and discarded.

  The present invention has been made in view of such circumstances, and polarized light that can prevent the occurrence of scratches on the protective film of the functional film and the occurrence of air entrainment between the functional film and the flat panel substrate. It aims at providing the sticking apparatus of functional films, such as a board and AR film.

In the functional film sticking device such as a polarizing plate or an AR film of the present invention, the functional film 2 adsorbed on the suction table 100 is tilted up with respect to the flat panel substrate 1, so that the functional film 2 and the flat panel substrate 1 are aligned. Is attached to the functional film sticking device P that is attached while being moved by being sandwiched between the sticking rollers 5 and 5,
The slide suction means 101 that is attracted to the functional film 2 in order to apply a back tension to the functional film 2 during the feeding movement of the functional film 2 is movable in the feeding movement direction of the functional film 2. The function of the functional film 2 under the condition that the rear end side in the feeding movement direction of the functional film 2 is attracted to the slide suction means 101 and the back tension is applied to the functional film 2 is provided. The adhesive film 2 is bonded to the flat panel substrate 1.

  According to such a configuration, if the rear end side in the feed movement direction of the functional film 2 is attracted to the slide suction means 101 and the functional film 2 is fed and moved, the slide suction means 101 follows and moves. Therefore, the functional film 2 and the flat panel substrate 1 can be attached in a state where the back tension is applied to the functional film 2 due to the resistance when the slide suction means 101 moves. Therefore, even if the functional film 2 is curled, the curl is fed and moved until the rear end of the functional film 2 reaches the sticking rollers 5 and 5. The risk of entraining air is reduced. Further, since the pasting operation is performed with the back tension applied to the functional film 2, it is not necessary to weakly adsorb the functional film 2 with a suction cup as in the past, and the protective film can be applied to the protective film by contact with the suction cup. Damage will not occur.

  The functional film sticking apparatus such as a polarizing plate and an AR film according to the present invention attaches the functional film and the flat panel substrate under a state in which the back tension is applied to the functional film by the slide suction means. Even if the functional film is curled, the curl is fed and moved until the rear end of the functional film reaches the application roller, so that the possibility of air being caught between the flat panel substrate is reduced. Also, since the pasting work is performed under the condition that the back tension is applied to the functional film, it is not necessary to weakly adsorb the functional film with the sucker during the pasting work, and the protective film is brought into contact with the sucker. No damage to the

  Hereinafter, a polarizing plate sticking machine (a functional film sticking device such as a polarizing plate and an AR film of the present invention) according to the best mode of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a polarizing plate sticking machine P, and FIG. 2 is a polarizing plate for explaining a process of attaching a polarizing plate (functional film of the present invention) 2 to a liquid crystal cell substrate (flat panel substrate of the present invention) 1. It is a side view of the sticking machine P. In addition, the same code | symbol is attached | subjected about the component, member, etc. which are the same as that of the structure demonstrated by background art, and the description is abbreviate | omitted.

  In these drawings, reference numeral 101 denotes a slide sucker (slide suction means of the present invention) for adsorbing the polarizing plate 2 so as to apply back tension to the polarizing plate 2 when the polarizing plate 2 is moved. A set table (suction table of the present invention) 100 is provided so as to be movable in the feed movement direction of the plate 2. Reference numeral 102 denotes a guide groove formed in the set table 100 in the moving direction of the slide sucker 101. As shown in the figure, the slide suckers 101 are arranged in a horizontal row and fixedly supported by connecting members (not shown), and can freely move in the horizontal direction in the direction of the arrow in the guide groove 102 (reciprocating). It is configured as follows.

  More specifically, a pair of LM guides and the like (not shown) disposed on the apparatus main body (not shown), for example, at both ends of the connecting member that fixedly supports each slide sucker 101 along the feed movement direction of the polarizing plate 2. ), The connecting member that is driven to the position near the applying roller 5 when the polarizing plate 2 is attached to the liquid crystal cell substrate 1 is moved to the original position by driving means such as an air cylinder (not shown). What is necessary is just to comprise so that it may return to.

  103 is arranged at positions on both sides of the guide groove 102 of the set table 100 so that the polarizer 2 is sucked and held on the set table 100 when the separator (see 2a in FIG. 4) is peeled off from the polarizer 2. Suction hole (or suction cup). A vacuum pump is connected to the slide suction cup 101 via a tube, and a vacuum pump (not shown) is connected to the suction hole (or suction cup) 103 via a suction circuit.

  With the above configuration, when the separator is first peeled off from the polarizing plate 2, the polarizing plate 2 (indicated by a two-dot chain line in FIG. 1) carried into a predetermined position on the set table 100 is removed at the time of main peeling. It is fixed to the set table 100 by suction through a slide suction cup 101 functioning as a suction means for suction and a suction hole 103 functioning as a suction means for auxiliary peeling. And a strip | belt-shaped peeling tape (refer 150 of FIG. 4) is affixed to a separator, and a separator is peeled off from the polarizing plate 2 by lifting this peeling tape. As a result, the adhesive layer of the liquid crystal cell substrate 1 is exposed, and preparation for attaching to the liquid crystal cell substrate 1 is completed.

  Next, in the pasting step, the suction state of all the suction holes 103 is released (vacuum is leaked), and only the rear end side (rear end edge) in the feed movement direction of the polarizing plate 2 is adsorbed to the slide sucker 101 And In this state, the polarizing plate 2 is nipped by the pasting rollers 5 and 5 together with the liquid crystal cell substrate 1 and moved. Then, as the polarizing plate 2 moves, the slide sucker 101 follows and is driven to the sticking rollers 5 and 5, so that back tension is applied to the polarizing plate 2 by the driven resistance of the slide sucker 101 in the driven process. In this state, the polarizing plate 2 is attached to the liquid crystal cell substrate 1.

  Therefore, even if the polarizing plate 2 is curled, it is fed and moved in a tension state in which the curl is corrected by the back tension until the rear end of the polarizing plate 2 reaches the application roller 5, and between the liquid crystal cell substrate 1 and the liquid crystal cell substrate 1. The risk of entraining air is reduced. In addition, since the polarizing plate 2 is attached along the set table 100 with the back tension applied to the polarizing plate 2, it is not necessary to weakly adsorb the polarizing plate 2 with a suction cup as in the prior art. No damage to the protective film due to contact with the suction cup. Thereby, the incidence rate of defective products is remarkably reduced, and the yield of products can be remarkably improved.

  FIG. 3 shows another example of the set table 100. In this example, all (four) slide suckers 101 are fixedly supported by connecting members 104 arranged in a direction orthogonal to the moving direction of the polarizing plate 2, and the slide sucker 101 is closest to the sticking roller 5. The state moved to is indicated by a two-dot chain line. As shown in this example, a tip suction hole 105 having a diameter smaller than that of the suction hole 103 and connected to a vacuum pump is provided at the tip position of the set table 100 (position closest to the sticking roller 5). When affixing to the liquid crystal cell substrate 1, the polarizing plate 2 may be weakly adsorbed by the tip adsorbing hole 105 at a position before the adhering roller 5.

  With such a configuration, the alignment accuracy of the polarizing plate 2 on the set table 100 (with respect to the liquid crystal cell substrate 1) can be more stably ensured in the attaching step of the polarizing plate 2. In such a configuration, since the separator is only weakly adsorbed by the suction hole (tip suction hole 105) formed on the surface of the set table 100, the separator is conventionally weakly adsorbed by a suction cup. There is no problem of scratching the surface.

  Note that the present invention is not limited to the embodiment, and design changes and improvements can be freely made as necessary without departing from the spirit of the invention. It may be provided in a plurality of rows in the lateral direction, and rubber or the like for preventing slipping at the time of suction may be provided around a slidable suction hole. Further, a suction cup may be provided in place of the suction hole 103, or the suction hole 103 may be formed in a narrow elongated hole shape along both sides of the guide groove 102. Further, the flat panel substrate 1 and the functional film 2 may be a plasma display substrate and an AR film, or may be other substrates and films.

It is a top view of the polarizing plate sticking machine which concerns on embodiment of this invention. It is a side view for demonstrating the sticking process of the polarizing plate sticking machine. It is a perspective view which shows an example of the set table. It is sectional drawing of a color liquid crystal display. It is explanatory drawing of the process of peeling the separator of a polarizing plate. It is explanatory drawing of the process of affixing a polarizing plate on a liquid crystal cell substrate. It is a top view which shows an example of the conventional suction table. FIG. 8 is a cross-sectional view taken along line VII-VII in FIG. 7.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Flat panel substrate, 2 ... Functional film, 5 ... Pasting roller, 100 ... Suction table, 101 ... Slide suction means

Claims (1)

The functional film (2) adsorbed on the suction table (100) is tilted up with respect to the flat panel substrate (1) to attach the functional film (2) and the flat panel substrate (1) to the application roller (5, 5). 5) A functional film sticking device (P) that is stuck while being fed and moved in step 5),
A slide suction means (101) for adsorbing the functional film (2) to cause back tension to act on the functional film (2) during feeding movement of the functional film (2) is provided on the functional film (2). ) Is provided in the suction table (100) so as to be movable in the feed movement direction, and the rear end side in the feed movement direction of the functional film (2) is attracted to the slide suction means (101) to A functional film affixing device such as a polarizing plate or an AR film, wherein the functional film (2) is affixed to the flat panel substrate (1) in a state where a back tension is applied to the functional film (2) .

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