TWI608273B - Optical display device manufacturing method and manufacturing apparatus - Google Patents

Description

Optical display device manufacturing method and manufacturing device

The present invention relates to a method and an apparatus for manufacturing an optical display device by bonding an optical film sheet to a panel member (hereinafter referred to as "RTP bonding method and apparatus").

More specifically, the present invention relates to a manufacturing method and a manufacturing apparatus for reversing the other side of a carrier film on the inside by a peeling means disposed at a near position to be pasted by a predetermined roll. The optical film laminate conveyance carrier film is sent to a predetermined position where the carrier film is peeled off, and is bonded to a panel member that is attached to the bonding position by the proximity peeling means to manufacture the optical display device. In the bonding work of the RTP bonding apparatus, when the charged elongated roll-shaped carrier film is conveyed by the pasting position and is recovered by the peeling means, the charged potential of the carrier film is charged The induction charging of the panel member is controlled in such a manner that it does not affect the panel member that is transported toward the predetermined position in a manner that is close thereto.

It is known that static electricity charged in an optical display device has a risk of deteriorating and destroying built-in electronic components. For example, the inner liquid The electronic component of the crystal panel includes a field effect transistor such as a TFT element. In order to prevent electrostatic damage of such electronic parts, in the manufacture of a liquid crystal display device, the manufacturing is usually completed by different processes as shown below.

In general, a liquid crystal panel has a structure in which a liquid crystal layer is sealed between a color filter (CF substrate) layer and a transparent electrode (TFT substrate) layer. The liquid crystal display device is completed at least by attaching the polarizing film to the upper and lower surfaces of the liquid crystal panel so as to intersect the transmission axis. In this case, after the end surface of the liquid crystal panel is formed in advance, the liquid crystal display device is completed by the bonding process of the polarizing film, or after the bonding process of the polarizing film is completed, the end surface of the liquid crystal panel is molded to complete the liquid crystal display device. It is a manufacturing method of the liquid crystal display device implemented. However, the charging prevention means for the liquid crystal panel has to be different.

That is, for the former, the polarizing film must be neutralized as shown below. In the latter, a short-circuit ring is formed in advance at the end of the liquid crystal panel, and the short-circuit ring is removed when the end surface of the liquid crystal panel is molded, thereby preventing liquid crystal display. Static damage to the unit.

The carrier film is peeled off and transported by an elongated roll-shaped optical film laminate including a rectangular optical film sheet, whereby the optical film sheet peeled off from the carrier film is sent to a predetermined position for sticking, and is carried. A method and apparatus for manufacturing an optical display device by bonding a rectangular panel member thereto, that is, an RTP bonding method and apparatus, relating to the peeling of the optical film sheet from a carrier film The means of preventing stripping and charging has been opened as in Japan. Proposal described in Japanese Patent Publication No. 2012-224041 (Patent Document 2).

Patent Document 2 discloses a technique for suppressing static electricity generated in an optical film sheet bonded to a panel member by peeling electrification. The present invention relates to an RTP bonding method and apparatus comprising a functional film comprising a base film corresponding to a carrier film and an elongated roll-shaped optical film laminate corresponding to a functional film of an optical film. The functional film sheet corresponding to the optical film sheet is formed, and the carrier film of the optical film laminate of the long roll shape is peeled off by the peeling means, and the optical film is bonded to the panel member to manufacture an optical display device. .

Specifically, it is disclosed that when the base film of the elongated roll shape is peeled off, the static electricity of the functional film sheet which occurs due to the peeling operation is bonded to the panel member to manufacture the optical film. In the case of the display device, the substrate film is negatively charged (or positively charged) in such a manner that the electronic component built in the panel member is not electrically damaged. The base film is made of a material on the negative side (or the positive side), thereby controlling the amount of static electricity generated in the base film, thereby suppressing the charge amount of the functional film sheet. In other words, Patent Document 2 describes the amount of charge that suppresses the functional film sheet that is directly bonded to the panel member.

However, the countermeasure against electrostatic damage of the electronic component incorporated in the panel member is not limited to the RTP bonding method and apparatus, and a plurality of release film sheets which are formed in a rectangular shape in advance to match the shape of the panel member are prepared. An optical film sheet of an adhesive layer, which transports the panel member and the optical film sheet to a predetermined position for bonding, and is composed of an optical film There has been various proposals for a so-called sheet bonding method and apparatus for producing an optical display device by peeling a release film sheet from an adhesive layer and bonding the optical film sheet to the panel member.

Japanese Laid-Open Patent Publication No. Hei 11-157013 (Patent Document 3) discloses a mold release layer in which a hardened crucible is formed on one surface of a long roll-shaped carrier film, and a charge preventing layer is formed on the other surface, and the carrier film is reduced. The resulting stripping charge or the carrier film does not generate static electricity. Thereby, even if the optical film or the optical film sheet laminated on the carrier film is peeled off from the carrier film, the electric potential for peeling off the optical film or the optical film sheet can be suppressed.

Further, Patent Document 4 to Patent Document 6 disclose an optical film laminate which suppresses electrostatic interference due to peeling electrification as described above. Specifically, it is an adhesive layer provided on the surface on which the adhesive layer of the optical film constituting the optical film laminate is formed, or an adhesive layer in which an optical film is formed by a conductive adhesive. These are each provided with a charge preventing layer, a conductive layer or a conductive adhesive layer on each of the carrier film or the optical film or the optical film sheet constituting the optical film laminate.

In addition, as disclosed in Japanese Laid-Open Patent Publication No. 2004-322571 (Patent Document 7), there is a proposal for a method for producing a thermoplastic resin film that prevents defects due to frictional charging. Although this is not a technique for suppressing static electricity generated in an optical film sheet attached to a panel member of an optical display device by peeling electrification, it is a roll formed by a resin using a surface. When the thermoplastic resin film is stretched, the charging due to the friction between the roller and the thermoplastic resin film becomes A method of producing a thermoplastic resin film which is adjusted to have a size of -2 kV or more and +2 kV or less so that foreign matter does not adhere to the surface of the roll.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. Hei 5-34725

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2012-224041

[Patent Document 3] Japanese Patent Laid-Open No. Hei 11-157013

[Patent Document 4] Japanese Patent No. 4355215

[Patent Document 5] Japanese Laid-Open Patent Publication No. 2001-318230

[Patent Document 6] Japanese Patent Laid-Open Publication No. 2002-22960

[Patent Document 7] Japanese Patent Laid-Open Publication No. 2004-322571

In the production of the optical display device by the RTP bonding apparatus, the long roll-shaped carrier film which is peeled off by the peeling means by the long roll-shaped optical film laminate is transported and recovered. There is a challenge to the technical problem of how to cause the panel member during transportation to be inductively charged by a carrier film that is charged by friction with the peeling means.

In the RTP bonding apparatus, since the entire apparatus is simplified, the transport path of the carrier film which is peeled off and recovered by the optical film laminate is adhered by the peeling means which is adhered to the predetermined position. The conveyance path of the panel member to which the predetermined position is conveyed is disposed so as to overlap in a state of being parallel or nearly parallel. As a result of intensive study by the present inventors, it has been found that the electric potential charged by the friction between the carrier film recovered and the peeling means at this time causes the panel member to affect the electronic component that is built into the panel member that is carried toward the bonding position. Inductive charging.

Therefore, in particular, in the RTP bonding apparatus, the inductive charging system of the panel member by the charged carrier film which is generated by the arrangement in which the paths of the respective paths overlap in the parallel or nearly parallel state must be controlled to be constant. Below the potential. This is a new technical issue of the RTP bonding device.

In the RTP bonding apparatus, the control of the amount of triboelectric charge generated in the elongated roll-shaped carrier film can be achieved by: firstly, an elongated roll-shaped carrier film is formed on the carrier film. An adhesive film layer on one side and a plurality of optical film laminates formed by a plurality of optical film sheets continuously supported by the adhesive layer are continuously fed toward a predetermined position for pasting, and then have a predetermined position in the pasting. The top portion of the peeling body at the top of the proximal crucible of the position is folded back on the inner side of the carrier film, and only the carrier film is conveyed by the optical film laminate, and the optical film sheet is sequentially peeled off together with the adhesive layer and sent to the optical film sheet. Adhering to the predetermined position, on the other hand, the panel member of the built-in electronic component is moved to the top of the peeling body and transported to the predetermined position of the pasting, and finally the optical film sheet is bonded to the panel structure by the adhesive layer in the predetermined position of pasting. One of the members, when manufacturing the optical display device, comprises at least a material selected from the same material as the carrier film or the closest material on the electrified column defined by the electrostatic safety pointer. The contact surface of the top with the carrier film.

A first aspect of the present invention is a method of manufacturing an optical display device comprising at least a carrier film, an adhesive layer formed on one side of the carrier film, and a plurality of optical film sheets continuously supported by the adhesive layer. The long-shaped roll-shaped optical film laminate of the configuration is continuously fed toward a predetermined position to be adhered, and the other side of the carrier film is folded back on the top of the peeling body having the top of the proximal side disposed at the predetermined position of the pasting. The carrier film is transported by the optical film laminate, and the optical film sheet is sequentially peeled off from the carrier film together with the adhesive layer, and is sent to the predetermined position for bonding. On the other hand, the rectangular panel member is closely connected. a method of manufacturing an optical display device by attaching the top portion of the peeling body to the predetermined bonding position and bonding the optical film sheet to one surface of the panel member by the adhesive layer at the predetermined bonding position. System: selected from the same material as the aforementioned carrier film, or by static electricity The closest material on the electrified row defined by the safety hand, at least by the selected material, the contact surface of the peeling body with the carrier film, whereby the carrier film is transported due to the peeling body The induced charging of the panel member caused by the frictional charging of the carrier film by the friction is controlled to be a certain potential or lower.

In the first aspect of the invention, the panel member may be A liquid crystal panel comprising a built-in electronic component, the optical film laminate system being continuously supported by at least one of the plurality of slits of a short side or a long side suitable for the liquid crystal panel in a wide direction. A plurality of polyvinyl alcohol-based film sheets of a polyvinyl alcohol-based film which is laminated on one side of a wide-length roll-shaped carrier film which is suitable for the rectangular long side or the short side of the liquid crystal panel. Composition. In this aspect, it is preferable that the liquid crystal of the optical display device manufactured by laminating the polyvinyl alcohol-based film sheet on one side of the liquid crystal panel by the adhesive layer does not cause misalignment. The inductive charging of the liquid crystal panel is controlled to be a certain potential or lower.

In the first aspect of the invention, it is preferable that the potential of the inductive charging of the panel member is controlled to be 400 V or less.

In the first aspect of the invention, it is preferable that the carrier film is made of a polyester material.

In the first aspect of the invention, it is preferred that the carrier film is made of a polyester-based material, a polyester-based material, or a propylene-based, polypropylene-based, polyethylene-based, or poly-four. Any of the fluoroethylene-based materials constitutes a contact surface of the top of the exfoliated body with the carrier film.

In the first aspect of the invention, the contact surface of the peeling body with the carrier film may be formed on a rough surface having stripe-like irregularities along the conveyance direction of the carrier film.

A second aspect of the present invention is an apparatus for manufacturing an optical display device which is formed of at least a carrier film and a carrier film formed thereon The long-side roll-shaped optical film laminate formed by the adhesive layer on the middle side and the plurality of optical film sheets continuously supported by the adhesive layer, and the optical film sheet are sequentially peeled off together with the adhesive layer to be pasted for pasting Positioning the rectangular panel member to the predetermined bonding position in a manner corresponding to the optical film sheet, and bonding the optical film sheet to one side of the panel member by the adhesive layer in the predetermined bonding position An apparatus for manufacturing an optical display device, comprising: a bonding means for operating the optical film sheet to be adhered to one surface of the panel member by the adhesive layer; The peeling body functions in a direction opposite to a feeding direction of the optical film sheet peeled off together with the adhesive layer, and the other surface of the carrier film is folded inside and transported, and is selected from The aforementioned carrier film is the same material or a charged column defined by an electrostatic safety pointer The approaching material comprises a contact surface with the carrier film by the selected material, and has a top portion disposed on the near side of the pasting predetermined position; the conveying means is only to be on the top of the peeling body, and the other The carrier film folded back on the inner side is conveyed to the peeling body without being loosely transported, and is then sent to the carrier film by peeling off the optical film sheet together with the adhesive layer. Actuating the predetermined position of the sticking; the panel member transporting means is configured to move the panel member to the predetermined position to be adhered; and And a control means for causing the bonding means, the conveying means, and the panel member conveying means to operate in association with each other, and causing friction in the carrier film due to friction with the peeling body when the carrier film is conveyed The inductive charging control of the aforementioned panel member caused by charging is below a certain potential.

In a second aspect of the invention, the panel member may include a liquid crystal panel having an electronic component, and the optical film laminate system may be formed by inserting a plurality of rectangular short sides suitable for the liquid crystal panel in a wide direction. Or the continuous cutting of the length of the long side is supported by the carrier film having a wide-width roll-shaped carrier film having a rectangular long side or a short side suitable for the liquid crystal panel at least along with the adhesive layer. The polyvinyl alcohol-based film of one side is composed of a plurality of polyvinyl alcohol-based film sheets. In this aspect, it is preferable that the liquid crystal of the optical display device manufactured by laminating the polyvinyl alcohol-based film sheet on one side of the liquid crystal panel by the adhesive layer does not cause misalignment. The inductive charging of the liquid crystal panel is controlled to be a certain potential or lower.

In the second aspect of the invention, it is preferable that the potential of the inductive charging of the panel member is controlled to be 400 V or less.

In the second aspect of the invention, when the carrier film is made of a polyester-based material, the peeling system may be formed by any one selected from the same material as that of the carrier film. The closest material on the electrified column defined by the electrostatic safety pointer, coated with the contact surface of the aforementioned carrier film; or by a material selected from the same as the aforementioned carrier film, or defined by an electrostatic safety pointer Closest on the live column a material comprising a tape covering the contact surface of the carrier film; or formed by a material selected from the same material as the carrier film or defined by a static electricity pointer. The constituted cylinder.

In the second aspect of the invention, it is preferable that the carrier film is made of a polyester material.

In the second aspect of the invention, the carrier film is made of a polyester material, preferably a polyester material, or a propylene, polypropylene, polyethylene, or poly. Any of the tetrafluoroethylene-based materials constitutes a contact surface of the top of the exfoliated body with the carrier film.

In the second aspect of the invention, the contact surface of the peeling body with the carrier film may be a rough surface having stripe-like irregularities along the conveyance direction of the carrier film.

1‧‧‧Optical film laminate

2‧‧‧ Carrier film

3‧‧‧Optical film sheet

4‧‧‧Adhesive layer

5‧‧‧ Panel components

6‧‧‧Optical display device

10‧‧‧RTP laminating device

50‧‧‧Fitting device

51‧‧‧Finishing roller

60‧‧‧Exfoliation

61‧‧‧Top of peeling body 60

62‧‧‧Contact surface of the peeling body 60 and the optical film laminate 1

63‧‧‧The base of the peeling body 60

80‧‧‧film feeding device

81‧‧‧ Forward feed roller

82‧‧‧Inverted feed roller

100‧‧‧Paste the intended location

110‧‧‧Transportation path of carrier film 2

300‧‧‧Standby reservation location

310‧‧‧Transportation path of panel member 5

R1‧‧‧Reel roll

R2‧‧‧ winding roller

Fig. 1 is a schematic view showing the entire RTP bonding apparatus.

Fig. 2 is a photograph showing a phenomenon of light leakage of an optical display device (liquid crystal panel).

Fig. 3 is a schematic view showing a mechanism of liquid crystal alignment disorder caused by induction charging of an optical display device (liquid crystal panel).

Fig. 4 is a measurement result of light leakage occurring in an optical display device (liquid crystal panel) in which the charge amount is arranged in a high and low order.

Fig. 5 is a schematic view showing the contact action of the peeling body with the carrier film.

Figure 6 is a verification data showing the relationship between the potential of the carrier film and the potential of the panel member that is inductively charged.

Figure 7 shows a portion of a live column defined by an electrostatic safety pointer.

Fig. 8 is an experimental method for measuring the amount of triboelectric charge due to different materials on the surface of the peeling body.

Fig. 9 is a measurement data of the frictional charge amount due to the different materials/shapes of the surface of the peeling body.

Fig. 10 is a graph showing the measurement data of the frictional charge amount of the surface of the peeling body of each of the two different carrier films due to different materials/shapes.

Fig. 11 is a shape of a peeling body in which a material in a range of a charge allowable amount of ±5 kV is formed into a tape shape and adhered to a contact surface of a carrier film including a top portion of a stainless steel peeling body.

Fig. 12 is a view showing the shape of a peeling body after coating a contact surface with a carrier film containing a top portion of a stainless steel peeling body, using a polyester having a material in a range of ±5 kV of a charge tolerance.

Fig. 13 is a view showing a contact surface of a carrier film including a top portion of a stainless steel peeling body, which is placed in a range of a charge tolerance of ±5 kV, and a block-shaped cassette which is detachably formed on the base of the peeling body. shape.

Fig. 1(a) is a schematic view showing the entire RTP bonding apparatus. In the RTP laminating device 10, the unwinding roller R1 is wound into a long shape. A roll-shaped optical film laminate 1 is provided. The optical film laminate 1 is at least: a carrier film 2 having a width corresponding to the size (long side or short side) of the panel member 5, and an adhesive layer 4 formed on one side of the carrier film 2 and by the adhesive layer 4 The plurality of optical film sheets 3 are continuously supported. The optical film sheet 3 is formed to include a layer in which the cut-in line in the width direction (short side or long side) of the corresponding panel member 5 reaches the surface of the carrier film 2, and is laminated on the carrier through the adhesive layer 4. A film sheet of the adhesive layer 4 of the optical film of the film 2.

As shown in Fig. 1(a), the RTP bonding apparatus 10 includes a film feeding device 80 which is constructed by unwinding the optical film laminate 1 by the unwinding roller R1. The feed roller 81 is rotated; and the elongated roll-shaped carrier film 2, which is peeled off by the optical film laminate 1, is wound around the reverse feed roller 82 of the winding roller R2. With such a configuration, the apparatus 10 does not need to loosen the long-shaped roll-shaped optical film laminate 1, that is, conveys toward the pasting predetermined position 100, and is peeled off by the top 61 having the near jaw disposed at the pasting predetermined position 100. The body 60, the optical film sheet 3 including the adhesive layer 4 is peeled off from the carrier film 2 of the optical film laminate 1 and sent to the pasting predetermined position 100. At this time, the carrier film 2 is recovered by the feed roller 110 of the carrier film 2 by the reverse feed roller 82, and is collected by the winding roller R2.

The peeling body 60 having the top portion 61 is a rectangular shape having a width and a length exceeding the width of the optical film laminate 1 or the long side of the panel member 5 as shown in Fig. 1(b), and the top 61 is provided. It is a wedge-shaped structure of the front end. Usually in the vicinity of the predetermined position 100 The top portion 61 constituting the front end portion is disposed, and the peeling body 60 is disposed obliquely below the conveyance path 310 of the panel member 5. The conveyance path 110 of the carrier film 2 that is folded back and conveyed on the top portion 61 is preferably positioned so as to form a double structure with the conveyance path 310 of the panel member 5. The structure of the contact surface 62 of the peeling body 60 and the optical film laminate 1 will be described later.

The RTP bonding apparatus 10 is transported to the pasting predetermined position 100 along the conveyance path 310 by the standby predetermined position 300 so as to correspond to the optical film sheet 3 including the adhesive layer 4 which is sent to the bonding predetermined position 100. In the bonding predetermined position 100, the bonding apparatus 50 including the bonding roller 51 bonds the optical film sheet 3 to one surface of the panel member 5 to be conveyed by the adhesive layer 4, thereby manufacturing the optical display device 6.

In the manufacture of the optical display device 6, the panel member 5 constituting the optical display device 6 usually incorporates electronic components such as TFTs, and from the viewpoint of avoiding electrostatic damage, the charging prevention system cannot be ignored. As seen in Patent Document 2, the means for preventing the static electricity generated by the carrier film 2 from being peeled off from the optical film sheet 3 including the adhesive layer 4 of the panel member 5, that is, the peeling electrification means is merely an example. For example, as shown in the schematic diagram of FIG. 1, the optical film including the adhesive layer 4 can be suppressed and controlled by peeling off from the carrier film 2 by using a self-discharge type static eliminating device or using an optical film having a conductive function. The potential of the static electricity generated by the sheet 3.

Nevertheless, in the RTP bonding apparatus 10, as seen in the photograph of FIG. 2, the optical display device 6 has a light-transmissive portion due to disorder of liquid crystal alignment. As a result, the penetration inspection of the optical display device 6 as a product It becomes impossible to cause an obstacle in the continuous manufacture of the optical display device 6.

The carrier film 2 is charged by friction with the peeling body 60 having the top portion 61. The frictionally charged carrier film 2 is conveyed to the take-up roll R2 via the conveyance path 110 and is collected. As seen in FIG. 1(a) or (b), the panel member 5 is conveyed in the opposite direction along the conveyance path 310 toward the adhesion predetermined position 100 in the vicinity of the carrier film 2 that is conveyed and recovered.

At this time, the panel member 5 is inductively charged by the frictionally charged carrier film 2, and the inductive charging affects the electronic components built in the panel member 5, whereby the optical film sheet 3 is bonded as shown in FIG. A light transmissive portion occurs in the optical display device 6 of the panel member 5. The optical display device 6 manufactured by bonding the optical film sheet 3 to the panel member 5 as described above is not only difficult to detect by the inspection of the optical display device 6, but also causes the panel member 5 before the optical film sheet 3 is pasted. The built-in electronic parts are electrostatically damaged. In order to avoid such a situation, the charge amount of the carrier film 2 due to the friction with the peeling body 60 having the top portion 61 must be controlled to be a certain potential or lower.

3 is a schematic view for explaining a mechanism in which liquid crystal alignment disorder occurs in the optical display device 6 by inductive charging. The panel member 5 shown in FIGS. 3(a) to 3(c) is a liquid crystal in which a liquid crystal layer is sealed between a color filter substrate (CF substrate) on the viewing side and a thin transistor substrate (TFT substrate) on the non-view side. The panel is an object. For example, as shown in FIG. 3(b), the lower side of the carrier film 2 carried with the negative electric charge due to frictional charging is passed toward the predetermined position 100. Piece 5 is charged by inductive charging and charges are polarized on both sides.

Specifically, as is clear from the figure, the surface of the CF substrate adjacent to the carrier film 2 is positively charged, and the lower surface of the TFT substrate is negatively charged. As a result, a negative charge is applied to the lower surface of the CF substrate on which the liquid crystal layer is formed, and a positive charge is applied to the upper surface of the TFT substrate on which the liquid crystal layer is formed, and the liquid crystal layer is activated by the potential difference. Since the light passes to the start of the liquid crystal layer, as shown in FIG. 2, the surface of the panel member 5 appears to pass through vainly. If the potential difference is large, it also becomes a cause of electrostatic damage of the transistor.

Fig. 3(c) shows a state in which the charged carrier film 2 is inductively attenuated away from the panel member 5. However, if the panel member 5 is charged more than the upper limit charge amount, the closed state transistor will have a charge, and the decay takes time, and the liquid crystal layer is connected to the state activated by the potential difference, and then passes through as shown in FIG. 2 in succession. status.

In the RTP bonding apparatus 10, it is difficult to cause frictional charging of the carrier film 2 which is peeled off from the optical film laminate 1 by the peeling body 60. This is based on the fact that the transport path 110 of the carrier film 2 that is normally frictionally charged is disposed in close proximity to the transport path 310 of the panel member 5, so that a certain degree of inductive charging of the panel member 5 cannot be avoided. The problem is that it is necessary to verify to what extent the charge amount of the panel member 5, that is, the charge allowable amount, does not cause light leakage of the panel member 5. In order to determine the amount of charge tolerance, the amount of charge (potential) is arranged in a high-low order to measure the light-transmissive portion generated in the panel member 5.

Fig. 4 is a graph showing the measurement results of 44 cases according to a specific material and device. Incidentally, the specific materials and equipment will be shown in Figure 4. The type ‧ manufacturer's products shown are pre-requisites. As is clear from Fig. 4, specifically, a carrier film obtained by using a L32-C6 liquid crystal panel manufactured by Panasonic, a ELB38 manufactured by Mitsubishi resin, or a Celapeel manufactured by Toray Film, and a polarizing film of CMG1765CU manufactured by Nitto Denko Corporation And the premise of the specific materials and devices derived from the RTP bonding device shown in FIG. The bar graph indicates the potential of the charge amount of the liquid crystal panel.

In the case of the symbol, the amount of charge of the liquid crystal panel is arranged in a high-low order, and the occurrence of the light-transmissive portion does not occur in three stages, but the light-transmissive portion is weak, and the light-transmissive portion is generated. A result of measurement of the light-transmissive strength of the light-transmissive portion of the liquid crystal panel such as strong occurrence. When the potential of the inductively charged panel member 5 is 400 V or less, the light transmissive portion hardly occurs. Of the 34 cases, only 4 cases had photo-transparent parts, which was also the occurrence of weak light transmission. In the 29th case, the occurrence of strong light transmission intensity was found, which was presumed to be the exception of the liquid crystal panel being inductively charged in a charged state in other processes such as washing. The 39th case was similarly presumed to be an exception. The 35th to 40th cases were at a potential of 400V before and after, although the light transmissive portion occurred, but it was weak. The remaining 50V or more of the 41st case to the 44th case of 4 cases were all strong in light transmission intensity. At a potential of about 400 V, although a weak light transmissive portion occurs, the frequency of occurrence is generally low. However, if the potential of the induction charging exceeds 500 V, it is understood that the light transmission intensity is strong and the frequency of occurrence is close to 100%.

The carrier film 2 at this time is a polyester film, and is a PET film. The carrier film 2 made of such a material is in the peeling body The top 61 of the 60 is folded back for handling and recycling. The frictional charge amount generated in the carrier film 2 at this time is the sum of the peeling charge amount ±α of the technical problem of Patent Document 2 and the frictional charge amount ±x of the technical subject as shown in the schematic diagram of FIG. 5 (X=± x±α) charge. In the case where the polyester-based carrier film 2 is formed of a stainless steel release body 60, the carrier film 2 usually has a charge amount of 20 kV to 40 kV. The inductive charge amount generated in the panel member 5 by the charged carrier film 2 is 500V to 600V as shown in FIG. In this state, a white light-transmissive portion occurs 100% at the start of the liquid crystal layer of the panel member 5.

The present invention is a means for suppressing the inductive charge amount of about 500V to 600V before and after 400V. An example of a solution is shown in Figure 6.

Comparative Example 1 of Fig. 6 is a general case in which the peeling body 60 is conveyed by inverting and transporting the polyester-based carrier film 2 with a stainless steel top 61. At this time, the potential of the panel member 5 is electrically charged to 500 to 600V. In the first and second embodiments of Fig. 6, the peeling body 60 which is in contact with the polyester-based carrier film 2 is coated with a polyester-based contact surface 62 made of a stainless steel material, and is applied in parallel with the conveyance direction of the carrier film by 1 μm or more. The surface treatment causes the coated contact surface 62 including the top portion 61 of the peeling body 60 to pass the carrier film 2 to reduce the inductive charge amount to the panel member 5 to about 300V. Fig. 6 shows the results of four measurements obtained by the actual machine. The inductive charge amount before and after 600 V of the comparative example was suppressed to about 300 V of Examples 1 and 2, and the charge allowable amount of the carrier film 2 was obtained by forming at least ±5 kV or less.

The materials of the carrier films 2 of the first and second embodiments and the coating of the contact surface 62 of the release film 60 with the carrier film 2 were both polyester. Further, the carrier film 2 is formed into a polyester-based PET film, and the carrier allowable amount of the carrier film 2 is ±5 kV or less, and the material of the contact body 62 of the release film 60 and the contact film 62 of the carrier film 2 is formed by The experiment shown below is carried out by estimating and sorting the charged column data.

Figure 7 is an example of a charged column as shown in the "Electrostatic Safety Pointer 2007" of the Technical Guidelines of the Institute of Safety and Health, General Administration (JNIOSH-TR-NO.42 (2007)). The object was inspected, and as a result, measurement data of the amount of triboelectric charge obtained by the different materials of the contact surface 62 of the peeling body 60 shown in Fig. 9 and the carrier film 2 was obtained.

Fig. 9 is a film A in which a 38 μm PET film (product name Cerapeel) made of Toray is used as the carrier film 2, and a 38 μm PET film (product name Diafoil) manufactured by Mitsubishi Plastics Co., Ltd. is used as the film B to change the relationship between the peeling bodies 60. The material of the contact surface 62 of the carrier film 2 was measured as a result of the amount of frictional charge (kV) generated in the carrier film 2.

The experimental method is shown in Figure 8. As shown in the schematic diagram of the experimental apparatus, a carrier film (a 38 μm PET film "product name Cerapeel" manufactured by Toray Industries, Inc.) with a width of 150 mm was connected to a 20 kg weight in a clean room at room temperature of 22 ° C / humidity of 50%. Rolled onto the roll of the carrier film via the top of the peeling means having a wide width of 250 mm Take the axis. After the carrier film was removed by using a blower type discharger, the carrier film of the top of the winding means was measured by a charge amount measuring device while holding the both ends of the winding shaft with a human hand. After the measurement, the material of the contact surface of the release means with the carrier film was changed to polyester (PET), polypropylene (PP), propylene, polyethylene (PE), or polytetrafluoroethylene (PTFE), and the measurement was performed. .

The results are shown in Figures 9 and 10. That is, Fig. 9 is a measurement data table of the frictional charge amount obtained by the rough surface shape of the contact surface of the peeling means with respect to the carrier film for Examples 3 to 14 and Comparative Examples 2 and 3. Incidentally, the film A was made of Cerapeel 8 μm manufactured by Toray Industries Co., Ltd., and the film B was made of Diafoil 38 μm made of Mitsubishi resin. In Examples 3 and 9, a saturated polyester coater having a film thickness of 0.3 mm was used as a peeling means made of iron (S55C). Other embodiments use those formed into a block shape using polyester (PET), polypropylene (PP), propylene, polyethylene (PE), and polytetrafluoroethylene (PTFE). In Comparative Examples 2 and 3, an iron (S55C) manufacturer was used as a peeling means.

Fig. 10 is a bar graph of measurement data of the frictional charge amount obtained by the rough surface shape of the contact surface of the carrier film with respect to the peeling means of each of two different carrier films (film A and film B).

As is clear from Comparative Examples 2 and 3 of the table of Fig. 9, if the peeling means is directly made of stainless steel (iron) (S55C), the frictional charge amount of the carrier film 2 after rubbing is taken for granted, and if it is film A, it becomes -20.5 kV. If it is film B, it becomes -22.1kV, which greatly exceeds the allowable charge of ±5kV. If these are compared with the frictional charge amounts of Examples 3 and 9, The potential difference between the former (Comparative Examples 2 and 3) and the latter (Examples 3 and 9) is clear at a glance. In the latter, a 0.33 mm saturated polyester coating was applied to the contact surface of the release film with the carrier film, and the contact surface was rubbed with sandpaper #1000 in the longitudinal direction of the carrier film to have a surface roughness of 1 μm or more. The frictional charge amount of the carrier film after rubbing is only -1.2 kV for film A, and -1.3 kV for film B. It is clear that these systems are significantly lower than the allowable amount of charge ± 5 kV, because the induced charge amount due to the triboelectric charging generated by the panel member 5 that is transported by the contact of the carrier film 2 after the rubbing is stopped by the value degree.

In the present experiment, the shape of the contact surface with the carrier film due to the peeling means which affects the amount of frictional charge is specifically measured, and specifically, the shape of the rough surface (Rmax = 0.3 μm, 1 μm, 2 μm) of the peeling means is caused. The amount of frictional charge was also verified for the effective shape due to the surface roughness direction of the peeling body 60 (parallel, oblique, and right angles to the conveyance direction of the carrier film). It also confirms whether it has wear resistance that can withstand a certain frequency of use.

The rough surface and the rough surface forming direction of the contact surface are applied to the contact surface of the peeling means and the carrier film is subjected to a saturated polyester coating of 0.33 mm to peel off, together with the material to be applied to the contact surface of the peeling means and the carrier film. The surface roughness of the contact surface of the carrier film is 1 μm or more, and the surface roughness direction of the contact surface of the peeling means with the carrier film is parallel to the longitudinal direction of the carrier film 2. The result of confirming in a more detailed experiment by the direction of the oblique direction or the vertical direction, it is better to use the film with the carrier. The conveyance direction is processed so that the rough surface of 1 micrometer or more is formed in parallel.

Further, as can be seen from the bar graph of FIG. 10, as the material of the contact surface 2 of the carrier film which forms the peeling means, the polyester (PET) which is selected from the charged film material and which is the same material as the carrier film, is in the charged column. Among the materials close to PET, polypropylene (PP), propylene, polyethylene (PE), and polytetrafluoroethylene (PTFE) are negatively charged with PET, PP, propylene, etc., or positively charged with PE, PTFE, etc. However, they are all materials within a range of ±5 kV of the allowable charge.

However, as to how the peeling body 60 having the top portion 61 forming the contact surface 62 with the carrier film 2 should be made, several options are considered. As shown in FIG. 11, first, the peeling body 60 can form a material in a range of a charge tolerance of ±5 kV into a tape shape and cover the contact surface 62 of the top film 61 including the stainless steel peeling body 60 with the carrier film 2. Way to make. Alternatively, as shown in FIG. 12, the peeling body 60 may be formed by applying a contact surface 62 of the top portion 61 including the stainless steel peeling body 60 to the carrier film 2, and applying a material within a range of a charge tolerance of ±5 kV, specifically, A saturated polyester coating having a film thickness of 0.33 mm was applied to the surface of the stainless steel, for example, a sandpaper #1000 was rubbed in the longitudinal direction of the carrier film 2 to form a rough surface of 1 μm. Alternatively, as shown in FIG. 13, the peeling body 60 may be placed in a range of a charge tolerance of ±5 kV, and the block-shaped cassette may be detachably formed on the base portion 63 of the stainless steel peeling body 60.

Such a change in the peeling body 60 having the top portion 61 forming the contact surface 62 with the carrier film 2 is also considered to be easy to wear as shown in Examples 6 to 8 or Examples 12 to 14 in the table shown in FIG. Material In the case of the material, the design of the contact surface 62 of the carrier film 2 can be exchanged and regenerated frequently.

Claims (13)

A method of manufacturing an optical display device comprising at least a carrier film, an adhesive layer formed on one side of the carrier film, and a plurality of optical film sheets continuously supported by the adhesive layer The optical film laminate is continuously fed toward a predetermined position of adhesion, and the other side of the carrier film is folded back inside the peeling body having the top portion of the near nail disposed at the predetermined position to be adhered, and is transported by the optical film laminate The carrier film is then sent to the predetermined position by the peeling of the optical film sheet together with the adhesive film, and the rectangular panel member is moved to the top of the peeling body and transported to the pasting predetermined. a method of manufacturing an optical display device by bonding the optical film sheet to one side of the panel member by the adhesive layer in the predetermined position of bonding, characterized in that it is the same as the carrier film a material constituting the peeling body and the carrier film Contact surfaces, whereby due to the frictional charging due to friction with the peeling occurs in the body, the carrier film when the carrier film is conveyed to the induction caused by the charging of the control panel member of a constant potential or less. A method of manufacturing an optical display device comprising at least a carrier film, an adhesive layer formed on one side of the carrier film, and a plurality of optical film sheets continuously supported by the adhesive layer The optical film laminate is continuously fed toward a predetermined position for bonding. The other side of the peeling body having the top of the proximal side disposed at the predetermined position of the adhesion is folded back on the inner side of the carrier film, and the carrier film is conveyed by the optical film laminate, whereby the carrier film is The adhesive layer is sequentially peeled off to the predetermined position of the adhesive film, and the rectangular panel member is conveyed to the top of the peeling body and transported to the predetermined position of the pasting, and the optical is fixed in the predetermined position. A method for producing an optical display device by bonding an adhesive layer to one surface of the panel member, wherein the carrier film is formed of a polyester-based material, and is made of a propylene-based or polypropylene-based material. And a material constituting a contact surface of the peeling body with the carrier film, thereby causing frictional charging of the carrier film due to friction with the peeling body when the carrier film is transported, and the front panel member is caused by frictional charging of the carrier film The inductive charging control is below a certain potential. A method of manufacturing an optical display device comprising at least a carrier film, an adhesive layer formed on one side of the carrier film, and a plurality of optical film sheets continuously supported by the adhesive layer The optical film laminate is continuously fed toward a predetermined position of adhesion, and the other side of the carrier film is folded back inside the peeling body having the top portion of the near nail disposed at the predetermined position to be adhered, and is transported by the optical film laminate The carrier film, whereby the optical film is sequentially peeled off by the carrier film together with the adhesive layer The sheet is conveyed to the predetermined position for bonding, and the rectangular panel member is conveyed to the predetermined position of the peeling body in proximity to the top portion of the peeling body, and the optical film sheet is bonded to the optical film sheet by the adhesive layer at the predetermined bonding position. A method of manufacturing an optical display device on one surface of the panel member, wherein the carrier film is formed of a polyester-based material, and the release body is formed of a polyethylene-based or polytetrafluoroethylene-based material. a contact surface with the carrier film, and the contact surface is formed on a rough surface having stripe-like irregularities along the conveyance direction of the carrier film, whereby the carrier film is conveyed by friction with the peeling body The inductive charging control of the panel member caused by the triboelectric charging of the carrier film is equal to or lower than a certain potential. The method of claim 1 or 2, wherein the contact surface of the release body with the carrier film is formed on a rough surface having stripe-like irregularities along the conveyance direction of the carrier film. The method according to any one of claims 1 to 3, wherein the inductively charged potential of the panel member is 400 V or less. An apparatus for manufacturing an optical display device, which is formed by at least a carrier film, an adhesive layer formed on one side of the carrier film, and a plurality of optical film sheets continuously supported by the adhesive layer. The optical film laminate, together with the adhesive layer, sequentially peels off the optical film sheet and sends it to a predetermined position to be adhered to the optical film A device for manufacturing an optical display device by transporting a rectangular panel member to a predetermined position for bonding, and bonding the optical film sheet to one surface of the panel member by the adhesive layer in the predetermined position for bonding And comprising: a bonding means for actuating the optical film sheet so as to be bonded to one surface of the panel member by the adhesive layer; and the peeling body The other side of the carrier film is folded back and transported in the opposite direction to the feeding direction of the optical film sheet peeled off together with the adhesive layer, and is the same as the carrier film described above. The contact surface material has a contact surface with the carrier film, and has a top portion disposed near the predetermined position of the adhesion; and the transport means is the carrier that is folded back on the top side of the peeling body and the other side is folded inside. The film is conveyed without being loosened while being wound around the peeling body. The carrier film is moved to the predetermined bonding position while peeling off the optical film sheet together with the adhesive layer, and the panel member conveying means is operated to convey the panel member to the predetermined predetermined position. And a control means for causing the bonding means, the conveying means, and the panel member conveying means to operate in association with each other, and causing friction between the carrier film and the peeling body due to the carrier film being conveyed The inductive charging control of the panel member caused by the triboelectric charging of the carrier film is equal to or lower than a certain potential. An apparatus for manufacturing an optical display device, which is formed by at least a carrier film, an adhesive layer formed on one side of the carrier film, and a plurality of optical film sheets continuously supported by the adhesive layer. The optical film laminate, together with the adhesive layer, sequentially peels off the optical film sheet and sends it to a predetermined position for sticking, and conveys the rectangular panel member to the predetermined predetermined position in a manner corresponding to the optical film sheet, in the pasting reservation In the position, the optical film sheet is bonded to one surface of the panel member by the adhesive layer, and the carrier film is made of a polyester material, and comprises: a bonding means for actuating the optical film sheet by laminating the optical film sheet on one side of the panel member by the adhesive layer; the peeling body is combined with the adhesive layer The feeding direction of the peeled optical film sheet is opposite to the direction of the carrier film A method in which the inside is folded back and transported, and a contact surface material of a propylene-based or polypropylene-based material forms a contact surface with the carrier film, and has a close-fitting disposed at a predetermined position of the adhesion. a carrier means for transporting the carrier film which is folded over the inner side of the peeling body and the other side of the peeling body In the state where the carrier film is peeled off together with the adhesive layer and sent to the predetermined position to be adhered, the carrier film is transported by the carrier member. Actuating means for moving the panel member to the predetermined position to be adhered; and controlling means for causing the bonding means, the conveying means, and the panel member conveying means to be actuated in association, and causing the carrier film to be transported The inductive charging control of the panel member caused by the frictional charging of the carrier film by the friction of the peeling body is equal to or lower than a certain potential. An apparatus for manufacturing an optical display device, which is formed by at least a carrier film, an adhesive layer formed on one side of the carrier film, and a plurality of optical film sheets continuously supported by the adhesive layer. The optical film laminate, together with the adhesive layer, sequentially peels off the optical film sheet and sends it to a predetermined position for sticking, and conveys the rectangular panel member to the predetermined predetermined position in a manner corresponding to the optical film sheet, in the pasting reservation In the position, the optical film sheet is bonded to one surface of the panel member by the adhesive layer, and the carrier film is made of a polyester material, and comprises: a bonding means for actuating the optical film sheet so as to be bonded to one surface of the panel member by the adhesive layer; The peeling body functions in a direction opposite to a feeding direction of the optical film sheet peeled off together with the adhesive layer, and the other surface of the carrier film is folded inside and conveyed, and is made of polyethylene a contact surface material of a polytetrafluoroethylene type to form a contact surface with the carrier film, and the contact surface is formed on a rough surface having stripe-like irregularities along the conveyance direction of the carrier film, and is disposed on the rough surface The transporting means is a carrier film which is folded over at the top of the peeling body and which is folded inside, and is not loosened while being wound around the peeling body. And transporting, by the carrier film, peeling off the optical film sheet together with the adhesive layer, and moving to the predetermined position of adhesion; the panel member transporting means for transporting the panel member to the pasting predetermined Positioning operation; and control means for the above-mentioned bonding means and the aforementioned means of transportation And the panel member conveying means is actuated in association, and the inductive charging of the panel member by the frictional charging of the carrier film due to friction with the peeling body when the carrier film is conveyed is controlled to a constant potential the following. The apparatus according to claim 6 or 7, wherein the contact surface of the peeling body with the carrier film is formed on a rough surface having stripe-like irregularities along the conveyance direction of the carrier film. The device according to any one of the items 6 to 8, wherein the inductively charged potential of the panel member is Below 400V. The apparatus according to any one of claims 6 to 8, wherein the peeling system coats the contact surface with the carrier film with the contact surface material. The apparatus according to any one of claims 6 to 8, wherein the peeling system covers the contact surface with the carrier film with an adhesive tape of the contact surface material. The apparatus according to any one of claims 6 to 8, wherein the peeling system forms a cylinder of a contact surface with the carrier film by the contact surface material.