WO2020003931A1

WO2020003931A1 - Method for manufacturing optical display device

Info

Publication number: WO2020003931A1
Application number: PCT/JP2019/022258
Authority: WO
Inventors: 誓大藤原; 曜彰大沢; 宜弘中村; 清貴堤; 孝二秋山
Original assignee: 日東電工株式会社
Priority date: 2018-06-29
Filing date: 2019-06-05
Publication date: 2020-01-02
Also published as: JP6605662B1; TW202006432A; CN111373466A; JP2020003687A; KR20210023790A; TWI801606B

Abstract

Provided is a method for manufacturing an optical display device by laminating a sheet-shaped optical functional film on a panel member without causing at least streak deformation in a pressure-sensitive adhesive layer. With the present method, in the pressure-sensitive adhesive layer of the sheet-shaped optical functional film peeled off from a carrier film, the sheet-shaped optical functional film is stopped at a stop position where the leading end of the sheet-shaped optical functional film before peeling does not protrude from a top portion of a peeling body having the top portion, by restarted winding of the carrier film, the leading end of the sheet-shaped optical functional film is fed from the stop position of the peeling body to a panel lamination position, while the sheet-shaped optical functional film is being peeled off from the carrier film at the top portion of the peeling body, the leading end is superimposed on the panel member that has been previously conveyed to the panel lamination position and, at the same time, without stopping, the sheet-shaped optical functional film and the panel member are sandwiched and laminated by a pair of pasting rollers that are closed from an open state and rotated, thereby manufacturing the optical display device without causing streak deformation in the pressure-sensitive adhesive layer.

Description

Method of manufacturing an optical display device

The present invention relates to a method for manufacturing an RTP optical display device. More specifically, in the present invention, the pressure-sensitive adhesive layer of the sheet-shaped optical functional film peeled off from the carrier film does not protrude from the top of the peeled body having the top, the leading end of the sheet-shaped optical functional film before peeling. Stopping at the stop position, the rewinding of the carrier film restarts the sheet-shaped optical functional film from the carrier film at the top of the peeled body while holding the leading end of the sheet-shaped optical functional film at the stop position on the peeled body. From the panel bonding position, without stopping, overlapped on the panel member conveyed to the panel bonding position, at least by a pair of bonding rollers that open and close, by sandwiching and bonding, to the adhesive layer The present invention relates to a method of manufacturing an optical display device so that at least a line-like deformation does not occur.

In recent years, roll-to-panel (RTP) type manufacturing apparatuses and methods have been adopted in manufacturing sites for optical display devices (for example, Patent Document 1). In the RTP system, an optical display device is usually manufactured as follows. First, a strip-shaped optical film laminate having a predetermined width is unwound from a roll. The strip-shaped optical film laminate includes a strip-shaped carrier film, an adhesive layer formed on one surface of the carrier film, and an optical functional film (protective film) supported on the carrier film via the adhesive layer. , A polarizer, a protective film, a pressure-sensitive adhesive layer, and a surface protective film). In the unwound strip-shaped optical film laminate, a sheet-shaped optical function film is formed between adjacent cut lines by continuously making cut lines in the width direction, and the adjacent sheet-shaped optical function is formed. The films can be trimmed from each other by the action of tension.

The sheet-shaped optical functional film continuously supported on the carrier film is usually a normal one having no defect, and is peeled off from the carrier film together with the pressure-sensitive adhesive layer by the peeling means arranged near the panel bonding position. Is sent to the panel bonding position. The sheet-shaped optical functional film reaching the panel bonding position is overlapped and pinched on the corresponding bonding surface of the panel member separately transported to the panel bonding position by a bonding means such as a pair of upper and lower bonding rolls that open and close. It is attached.

In the peeling means, the carrier film side of the optical film laminate is wound around the top of a substantially wedge-shaped peeling means having a top facing the panel bonding position. The sheet-shaped optical functional film is transported while returning the carrier film wound around the peeling means in a direction substantially opposite to the transport direction of the sheet-shaped optical functional film toward the panel laminating position. Exfoliated with the layer. In the present specification, a position on the apparatus where the sheet-shaped optical functional film is peeled off from the carrier film is referred to as a peeling position, and the peeling position exists near the top of the peeling means.

In such an RTP-type manufacturing system, the sheet-like optical functional film on the carrier film may be sent to a bonding position with a panel member in a state where its posture is shifted from an ideal posture. In this case, it is necessary to correct the orientation of the panel member according to the state of misalignment of the sheet-shaped optical functional film (also referred to as “posture adjustment”), and then bond the panel member and the sheet-shaped optical functional film. .
Further, in such an RTP-type manufacturing system, streak-like deformation may occur in the pressure-sensitive adhesive layer. Conventionally, in the case of a relatively thick optical functional film, even if a streak-like deformation occurs in the pressure-sensitive adhesive layer, it has been difficult to recognize that the deformation is such that it causes a defect on an image of the optical display device. However, due to a demand for high precision and high quality of an optical display device required in recent years, a streak-like deformation of the pressure-sensitive adhesive layer which has not been conventionally recognized as a defect may become a defect. Furthermore, as the thickness of the optical functional film is reduced, the ratio of the thickness of the pressure-sensitive adhesive layer to the thickness of the optical functional film is larger than in the case of a thick optical functional film. With the spread of such a thin optical functional film, streak-like deformation formed in the pressure-sensitive adhesive layer may not be left as a defect on an image of the optical display device.

Patent No. 6171041 Patent No. 5452761 Japanese Patent Application Laid-Open No. 2004-317441 JP 2012-113060 A Patent No. 5452760 Patent No. 5458212 Patent No. 5458211

An object of the present invention is to manufacture an optical display device by laminating a sheet-shaped optical functional film peeled together with an adhesive layer from a carrier film of a band-shaped optical film laminate to a panel member via the adhesive layer. Another object of the present invention is to provide a method of attaching a sheet-shaped optical functional film to a panel member so as not to cause streak-like deformation in the pressure-sensitive adhesive layer.

Patent Document 1 describes that a line-shaped deformation that occurs in the pressure-sensitive adhesive layer of the sheet-shaped optical functional film and is perpendicular to the feeding of the sheet-shaped optical functional film is eliminated. Specifically, when the sheet-shaped optical functional film peeled off from the carrier film together with the pressure-sensitive adhesive layer stops at the top of the peeling means and stops, the streak-like deformation generated in the pressure-sensitive adhesive layer is adhered to the panel member. A method is described in which the pressing force of the laminating roller is used to adjust the transport speed of the laminating roller to be adjusted.

Patent Literature 2 discloses that when the step of bonding the one preceding optical film sheet from which the carrier film has been peeled off together with the pressure-sensitive adhesive layer to the one preceding panel member is completed, the next one that once protrudes from the top of the peeled body A carrier film feeder in which a forward / reverse feed roller is disposed before and after the peeling member is described in which the front end portion of the optical film sheet with the pressure-sensitive adhesive layer on the carrier film is accurately returned to a predetermined position of the peeling member and made to stand by. I have.

In Patent Document 3, an optical film sheet having an adhesive layer is sent to a substrate that has been transported in advance to a pair of open bonding units, and the optical film sheet closes when the optical film sheet is caught. There is described a sticking device for sticking an optical film sheet to a substrate with a pressure-sensitive adhesive layer in a sticking unit that operates by pressing. Further, in Patent Document 4, when a sheet piece peeled off together with an adhesive layer from a carrier film is adhered to a liquid crystal panel, the sticking speed of the sticking roller is adjusted so as to eliminate the bending generated in the sheet piece. It is described that the speed is set faster than the speed.

Patent Document 5 describes that the top of a peeling body having a top of an apparatus for bonding an optical film sheet to a panel member is positioned closer to a bonding position of the apparatus to enhance bonding accuracy. It describes that the rear end of the optical film sheet is read at a predetermined detection position so that the front end of the optical film sheet is accurately positioned at a predetermined application position.

However, the present inventors have conducted intensive studies and sent the sheet-shaped optical functional film to the laminating position without causing streak-like deformation in the pressure-sensitive adhesive layer of the sheet-shaped optical functional film, which is the subject of the present invention, and bonded it. A method for manufacturing an optical display device was realized by bonding a panel member waiting at the mating position with an adhesive layer having no streak-like deformation.

Embodiments of the present invention are as follows.
As shown in FIG. 1, the carrier film 2, the pressure-sensitive adhesive layer 4 formed on one surface of the carrier film 2, and were continuously supported on the carrier film 2 via the pressure-sensitive adhesive layer 4. While peeling the sheet-shaped optical function film 3 together with the adhesive layer 4 from the carrier film 2 of the strip-shaped optical film laminate 1 including the plurality of sheet-shaped optical function films 3, the leading end 32 of the sheet-shaped optical function film 3 is removed. The pair of attaching

rollers

51 and 52 are sent toward the opened panel joining position 100 and are overlapped without stopping on the panel member 5 previously conveyed to the panel joining position 100, and are simultaneously closed by the closing operation. The sheet-like optical function film 3 is sandwiched between the panel member 5 by a pair of

sticking rollers

51 and 52 that open and close, and the sheet-like optical function film 3 is stuck to form an optical display device. It is a method of forming.

As shown in FIGS. 2A (a1) and (a2), FIGS. 8A (a1) and (a2), and FIGS. 10A (a1) and (a2), the sheet-shaped optical device supported on the carrier film 2 is used. Step A of stopping the leading end 32 of the functional film 3 at the stop position 200 on the peeling body 60 without projecting from the top 61 of the peeling body 60 having the top 61 arranged at a position facing the panel bonding position 100. As shown in FIGS. 2A (c1) and (c2), FIGS. 8A (c1) and (c2), and FIGS. 10A (c1) and (c2), the panel member 5 is connected to a pair of attaching

rollers

51 and 52. Is transported to the opened panel bonding position 100, stopped, and waits.

As shown in FIGS. 2B (d1) and (d2), FIGS. 8B (d1) and (d2), and FIGS. 10B (d1) and (d2), the method further includes removing the carrier film 2 from the top 61 of the release body 60. By transporting while folding back, the sheet-like optical functional film 3 is peeled off together with the pressure-sensitive adhesive layer 4, and the leading end 32 of the sheet-like optical functional film 3 is overlapped on the panel member 5 in a standby state without stopping. Step C of sending from the stop position 200 on the peeling body 60 to the panel bonding position 100 in which the pair of bonding rollers are opened, and similarly, FIGS. 2B (e1) and (e2), and FIGS. 8B (e1) and (e2). 10B, as shown in (e1) and (e2) of FIG. 10B, the leading end portion 32 of the sheet-shaped optical functional film 3 fed without stopping is moved from the stop position 200 on the peeling body 60 to the panel bonding position 100. Is detected, the front end portion 32 of the sheet-shaped optical functional film 3 is thereby overlapped with the panel member 5 waiting at the panel bonding position 100, so that a pair of bonded sheets is opened. Step D, in which the

rollers

51 and 52 are switched and closed, as shown in FIGS. 2B (f1) and (f2), FIGS. 8B (f1) and (f2), and FIGS. 10B (f1) and (f2). A pair of

application rollers

51 and 52 that are closed are sandwiched and adhered to the panel member 5 at the same time that the leading end 32 of the sheet-shaped optical functional film 3 is overlapped on the panel member 5. Step E.

The method further comprises the sheet supported on the carrier film 2 as shown in FIGS. 2C (h1) and (h2), FIGS. 8C (h1) and (h2), and FIGS. 10C (h1) and (h2). When the next leading end portion 32 of the sheet-shaped optical functional film 3 reaches the stop position 200 on the peeling body 60, the next leading end portion 32 of the sheet-shaped optical functional film 3 stops and rotates. 2C (i1) and (i2) in FIG. 2C, wherein the rear end 31 of the sheet-shaped optical functional film 3 that is bonded and conveyed to the panel member 5 by the pair of

bonding rollers

51 and 52 is conveyed. As shown in FIGS. 8C (i1) and (i2) and FIGS. 10C (i1) and (i2), the sheet-like optical functional film 3 and the panel member 5 are formed by a pair of sticking

rollers

51 and 52 which rotate by closing operation. Complete bonding After those comprising a step G of opening operation of the pair of sticking

rollers

51 and 52 closing operation, the.

As one of the embodiments of the present invention, a pair of attaching

rollers

51 and 52 for sandwiching and attaching the sheet-shaped optical functional film 3 and the panel member 5 are shown in FIGS. 2B (d1) and (e1), and FIG. As shown in (d1) and (e1), and FIG. 10B (d1) and (e1), the front end portion 32 of the sheet-like optical functional film 3 before the sheet-like optical functional film 3 and the panel member 5 are sandwiched. Is preferably rotated at the same speed as the sticking start speed v2 of the sheet-shaped optical function film 3 when the sheet-shaped optical function film 3 is stacked on the panel member 5.

As one embodiment of the present invention, as shown in FIGS. 2A (b1) and 2B (f1), FIGS. 8A (b1) and 8B (f1), and FIGS. 10A (b1) and 10B (f1). By monitoring the distance δ of the feed length of the rear end portion 31 of the sheet-shaped optical functional film 3, the leading end portion 32 of the sheet-shaped optical functional film 3 is moved from the stop position 200 on the release body 60 to the panel bonding position. A step H of detecting that the predetermined position 300 up to 100 has been reached can be included.

As one of the embodiments of the present invention, as shown in FIGS. 2B (f1), 8B (f1), and 10B (f1), the distal end portion 32 of the sheet-shaped optical functional film 3 is attached to the panel member 5. It is preferable that the sticking start speed v2 of the sheet-shaped optical functional film 3 that is nipped by the pair of sticking

rollers

51 and 52 that are stacked and closed and sent without stopping at the same time is less than 10 mm / sec.

As another embodiment of the present invention, the closing operation is performed as shown in FIGS. 2C (g1) and (h1), FIGS. 8C (g1) and (h1), and FIGS. 10C (g1) and (h1). When the bonding operation between the sheet-shaped optical functional film 3 and the panel member 5 reaches a predetermined length λ, the pair of

bonding rollers

51, 52 is sandwiched between the pair of

bonding rollers

51, 52 and is closed. Can be switched from the pasting start speed v2 to the pasting operation speed v3 higher than the pasting start speed v2, and the sheet-shaped optical functional film 3 and the panel member 5 can be further pasted together.

As another one of the embodiments of the present invention, as shown in [s13] of FIG. 3, [s13] of FIG. 9, and [s13] of FIG. From the stop position 200 on the peeling body 60, it is sent out toward the panel bonding position 100 at the delivery speed v1 adjusted to a speed higher than the bonding start speed v2, and from the stop position 200 on the peeling body 60 to the panel bonding position 100. Before reaching the predetermined position 300, the step I is switched from the sending speed v1 to the sticking start speed v2, and further, the leading end 32 is overlapped on the panel member 5 waiting without stopping.

FIG. 2C (g1), FIG. 8C (g1), FIG. 10C (g1), and [s10], [s12], and [s17] of FIG. As shown in [s10], [s12] and [s17] of FIG. 9, and [s10], [s12] and [s17] of FIG. A sheet sending speed v1 sent out toward the position 100, a sticking start speed v2 switched from the sheet sending speed v1 before reaching the predetermined position 300 between the stop position 200 on the peeling body 60 and the panel joining position 100, and a sheet. The laminating operation speed v3 at which the laminating speed of the pair of

laminating rollers

51 and 52 can be switched from the laminating start speed v2 when the laminating of the optical film 3 and the panel member 5 reaches the predetermined length λ. ,
v1 ≧ v2, v3≫v1
It is preferable to have the following relationship.

FIG. 2 is an enlarged schematic view of an apparatus for manufacturing an optical display device by bonding a sheet-shaped optical functional film and a panel member via an adhesive layer using a pair of bonding rollers at a panel bonding position. FIG. 1 shows a two-point movement type camera detection device for reading the rear end of the sheet-shaped optical functional film and the leading end of the sheet-shaped optical functional film at a stop position on the peeling body having a conical section having a top. The position of the leading end is indicated by the current position and the virtual position so that the two-point moving type camera detecting device that detects the position by reading the rear end of the sheet-shaped optical function film reciprocates by the moving distance δ. FIGS. 2A to 2C show a state in which the front end of the sheet-shaped optical functional film is advanced to the panel bonding position while the sheet-shaped optical functional film is peeled off from the carrier film and overlapped with the panel member waiting at the panel bonding position shown in FIG. It is a schematic diagram showing each process of (a1) and (a2)-(i1) and (i2) to hold and stick. FIGS. 2A to 2C show a two-point moving type camera detection device that reads the rear end of the sheet-shaped optical functional film for measuring the amount of movement of the leading end of the sheet-shaped optical functional film. FIG. 2A shows the steps (a1) and (a2) to (c1) and (c2). Subsequent to FIG. 2A, steps (d1) and (d2) to (f1) and (f2) are shown. Subsequent to FIG. 2B, steps (g1) and (g2) to (i1) and (i2) are shown. Details of a manufacturing process of an apparatus for manufacturing an optical display device shown in FIGS. 2A to 2C, which performs a bonding operation and operates a pair of bonding rollers configured to open and close in a vertical direction with respect to a feeding direction. FIG. 9 is a control flowchart showing steps [s1] to [s20]. Examples of a sheet-shaped optical functional film 3 having a thickness of 110 μm and a film of a pressure-sensitive adhesive layer 4 having a thickness of 25 μm (total thickness 135 μm) are attached to a panel member 5 in Examples and Comparative Examples. Examples 1 to 3 The evaluation items shown in the figure include cueing stop, film feeding speed v1, lamination start speed v2, lamination operation speed v3, glue streak, lamination, productivity, and the like. A tip of the sheet-shaped optical functional film in a fixed cue state is detected from the top of the peeled body, representing the comparative example 1 of FIG. 4, and the sheet-shaped optical functional film is detected from the detection position of the tip to the panel bonding position. It is a schematic diagram of a method of sticking by feeding and accurate positioning with a panel member. The front end of the next sheet-shaped optical functional film after the completion of the preceding laminating step, which is shown in Comparative Example 2 in FIG. 4, is detected at the panel bonding position, and the front and rear feeding of the sheet-shaped optical functional film is finely adjusted. FIG. 4 is a schematic diagram of a method of bonding by more accurate positioning with a panel member. 4 shows the comparative example 3 in which the leading end of the next sheet-shaped optical functional film after the preceding laminating step is rewound to the feeding position provided on the upstream side from the top of the peeling body, and the leading end is detected. It is a schematic diagram of a method of feeding a sheet-like optical functional film from a feeding position to a panel bonding position and bonding the optical functional film by accurate positioning with a panel member. FIGS. 8A to 8C show, like FIGS. 2A to 2C, the front end of the sheet-like optical functional film is advanced to the panel joining position while peeling the sheet-like optical functional film from the carrier film shown in FIG. It is a schematic diagram showing each process of (a1), (a2)-(i1), and (i2) which overlap and pinch and affix on the panel member waiting at a position. FIGS. 8A to 8C show a wide-field type which can alternately detect two points to be read, instead of a two-point movement type camera detection device for reading the rear end of the sheet-shaped optical functional film provided in FIGS. 2A to 2C. Is provided. FIG. 8A shows the steps (a1) and (a2) to (c1) and (c2). Subsequent to FIG. 8A, steps (d1) and (d2) to (f1) and (f2) are shown. FIG. 8B shows the steps (g1) and (g2) to (i1) and (i2). 8A to 8C, details of a manufacturing process of an apparatus for manufacturing an optical display device that performs a bonding operation and operates a pair of bonding rollers configured to open and close in a vertical direction with respect to a feeding direction. FIG. 9 is a control flowchart showing steps [s1] to [s20]. 10A to 10C, like FIGS. 2A to 2C, the tip of the sheet-like optical functional film is advanced to the panel joining position while peeling the sheet-like optical functional film from the carrier film shown in FIG. It is a schematic diagram showing each process of (a1), (a2)-(i1), and (i2) which overlap and pinch and affix on the panel member waiting at a position. FIGS. 10A to 10C show a two-point installation type in which two points are separately read instead of a two-point movement type camera detection device which reads the rear end of the sheet-like optical functional film provided in FIGS. 2A to 2C. A complex fixed camera detection device is provided. FIG. 10A shows each step of (a1) and (a2) to (c1) and (c2). Subsequent to FIG. 10A, steps (d1) and (d2) to (f1) and (f2) are shown. Subsequent to FIG. 10B, steps (g1) and (g2) to (i1) and (i2) are shown. Details of the manufacturing process of the device for manufacturing an optical display device shown in FIGS. 10A to 10C, which performs a bonding operation and operates a pair of bonding rollers configured to open and close in a vertical direction with respect to a feeding direction. FIG. 9 is a control flowchart showing steps [s1] to [s20].

An object of the present invention is to provide a method for manufacturing an optical display device according to the RTP method.

More specifically, as shown in the enlarged schematic diagram 1, the carrier film 2, an adhesive layer 4 formed on one surface of the carrier film 2, and a continuous film on the carrier film 2 via the adhesive layer 4. The sheet-shaped optical functional film 3 is peeled off together with the pressure-sensitive adhesive layer 4 from the carrier film 2 of the strip-shaped optical film laminate 1 including a plurality of sheet-shaped optical functional films 3 which are supported in a seamless manner. Is moved toward the panel bonding position 100, is overlapped on the panel member 5 previously conveyed to the panel bonding position 100, and the sheet-shaped optical member is closed by a pair of

bonding rollers

51 and 52 that open and close. When an optical display device is manufactured by sandwiching and bonding the functional film 3 and the panel member 5, the adhesive layer 4 is formed so as not to cause streak-like deformation when the optical display device is manufactured. It is to provide a method of bonding the bets like optical function film 3 to the panel member 5.

In Examples 1 to 6 of the embodiment according to the present invention, what is apparent from the items "stop cueing" and "glue line" shown in FIG. The leading end 32 of the sheet-shaped optical functional film 3 stops from the top 61 of the peeling body 60 having the top 61 without crawling, and displays “None” which does not stop after cueing, and “the glue streak cannot be visually confirmed. It was confirmed by experiments that no "glue streaks" were generated in the pressure-sensitive adhesive layer 4 as indicated by a triangle mark "."

In Comparative Examples 1 to 3 which are compared with Examples 1 to 6 of the embodiment of the present invention, what is clear from the items "stop cueing" and "glue line" shown in FIG. The display indicates “Yes” in which the leading end 32 of the sheet-shaped optical function film 3 stops after cueing from the top 61 of the peeling body 60 having the top 61 arranged at the position opposing the joining position 100, and also displays “Glue streaks visually”. As a result, it was confirmed by experiments that "glue streaks" were generated in the pressure-sensitive adhesive layer 4, as indicated by the X mark "can be confirmed."

However, Comparative Examples 1 to 3 in FIG. 4 do not have the technical problem of preventing the generation of “glue streaks”. These are the sheet-shaped optical functional film and the panel member, which are indicated by the Δ marks of C _p > 1.67 (n = 100) in the “process capability index C _p ”, as is clear from the “paste shift” item in FIG. And the invention realizing the required displacement accuracy.

Incidentally, in the case of C _p ≦ 1.67, as shown by the cross mark, the required displacement accuracy cannot be realized, as indicated by the X mark. In the third embodiment of the present invention, while the problem of the "glue line" which is a technical problem of the present invention has been overcome, the required displacement accuracy has been achieved as indicated by the X mark of the "displacement". It is understood that it cannot be done.

Although the technical problem relating to the displacement accuracy is not a component of the present invention, the sheet fed out from the stop position before the leading end 32 of the sheet-shaped optical functional film 3 is caught from the top 61 of the peeling body 60. Since it is related to the speed of the optical function film 3, it will be described in detail in the description of the third embodiment of the present invention.

Embodiments including embodiments 1 to 6 of the present invention will be described with reference to the enlarged schematic views of FIG. 1 and (a1) and (a2) to (i1) in FIGS. 2A to 8C, FIGS. 8A to 8C, and 10A to 10C. ) And (i2), and detailed steps [s1] to [s20] of the manufacturing process of the device 10 for manufacturing the optical display device of FIGS. 3, 9 and 11 respectively. This will be described below with reference to a control flow diagram.

FIG. 1 is an enlarged schematic view including a panel bonding position 100 of a device 10 for manufacturing an optical display device according to the RTP method. In FIG. 1, the feeding device 8 for the sheet-shaped optical functional film 3 winds the carrier film 2 in a state in which the other surface is turned inward at the top 61 of the peeling body 60 and wound around the peeling body 60 without loosening. Or a carrier film feeder operatively operative to rewind.

The feeding device 8 for the sheet-shaped optical functional film 3 can include forward /

reverse feed rollers

80 and 81 disposed at least in front and back with the top 61 of the peeling body 60 interposed therebetween. In that case, the feeding device 8 for the sheet-shaped optical function film 3 includes a forward / reverse rotation feed roller 80, a dancer roller 82 disposed between the forward / reverse rotation feed roller 80 and the peeling member 60, and the other one serving as a carrier film feeding device. And the control roller 800 shown in FIG. 3, FIG. 9, and FIG. 11, respectively, so that the carrier film 2 is wound or unwound without loosening. be able to. Thereby, the

camera detecting devices

70 and 71 or 72 a and 72 b read the rear end 31 of the sheet-shaped optical functional film 3 and measure the position of the leading end 32 of the sheet-shaped optical functional film 3, whereby the sheet-shaped optical functional film 3 is measured. An accurate stroke of the functional film 3 is secured.

Next, each of the detailed steps [s1] to [s20] of the steps common to FIGS. 2A to 2C, 8A to 8C, and 10A to 10C, and the steps common to FIGS. 3, 9 and 11 will be described. The common processes and detailed steps will be described in detail below with reference to FIGS. 2A to 2C and FIG.

2A (a1) and (a2) show a peeled body having a top portion 61 in which the leading end 32 of the sheet-shaped optical functional film 3 supported on the carrier film 2 is disposed at a position facing the panel bonding position 100. 60 stops at the stop position 200 on the peeling body 60 without cueing from the top 61 of the sheet-shaped optical functional film 3 at the stop position 200. Represents the step A confirmed by reading the rear end portion 31 of FIG.

This is obtained by measuring the position information x1 of the leading end portion 32 of the sheet-shaped optical functional film 3 before cueing detected by the two-point moving type camera detection device 70 shown in FIG. 2A (a1) in [s1] of FIG. This is shown as a step of recording the position information x1 in the storage device 802 of the control device 800 in [s2] of FIG.

FIGS. 2A (b1) and 2 (b2) show the panel member 5 toward the pre-sticking position of the panel member 5, ie, the panel joining position 100, as is apparent from FIG. 2A (b2) or [s3] of FIG. The state in which the panel member 5 is sucked and held by the suction conveyance means 90 at the pre-sticking position 600 prepared to convey the sheet.

This is done by reading the tip position 500 of the panel member 5 held by the suction conveyance means 90 detected by the detection means 91 shown in FIG. 1 as position information x2 in [s4] of FIG. 3 and further reading [s5] in FIG. ] As a step of recording the position information x2 in the storage device 802 of the control device 800.

[S6] in FIG. 3 is based on the position information x1 of the leading end portion 32 of the sheet-shaped optical function film before cueing recorded in the storage device 802 and the positional information x2 of the leading end position 500 of the panel member 5 before sticking. In order to adjust the position of the panel member 5 held by the suction conveyance means 90 at the position 600 in advance with respect to the leading end portion 32 of the sheet-shaped optical functional film 3, for example, a shift width and a shift angle (y, θ) in the longitudinal direction. [S7] in FIG. 3 is a step of adjusting the position of the panel member 5 held by the suction conveyance unit 90 at the pre-sticking position 600 based on the calculation.

FIGS. 2A (c1) and (c2) show a process B in which the panel member 5 is transported to the panel bonding position 100 where the pair of

bonding rollers

51 and 52 are opened, stopped, and waits. This is a step of transporting the panel member 5 whose position has been adjusted in advance to the panel bonding position 100 and stopping the panel member 5 at the panel bonding position 100 between the pair of opened

bonding rollers

51 and 52 in [s8] of FIG. As shown.

FIG. 2A (b1) shows [s9] in FIG. 2A (b1) in order to detect the leading end 32 of the sheet-shaped optical functional film 3 reaching the predetermined position 300 located between the stop position 200 and the panel bonding position 100. As shown, a two-point moving type camera detection device 70 for reading the rear end 31 of the sheet-shaped optical functional film 3 corresponds to the stop position 200 of the leading end 32 of the sheet-shaped optical functional film 3. And moving the rear end 31 of the sheet-shaped optical function film 3 from the position where the rear end 31 is read to the position where the rear end 31 of the sheet-shaped optical function film 3 reaches the predetermined position 300. Is δ.

Here, instead of the two-point movement type camera detection apparatus 70 shown in FIGS. 2A to 2C, FIGS. 8A to 8C using a wide-field type single fixed camera detection apparatus 71 that alternately reads two points with one unit. And the flowchart of FIG. 9 will be described.

In the detailed step of FIG. 9, in order to detect the leading end 32 of the sheet-shaped optical functional film 3 reaching the predetermined position 300 located between the stop position 200 and the panel bonding position 100, [s9] of FIG. The step of moving the camera detection device 70 of the two-point movement type as in the above is not required. In the case of the detailed steps shown in FIG. 9, a single fixed camera detection device 71 that alternately reads two points in a wide field of view is used to confirm the leading end 32 of the sheet-shaped optical functional film 3 that stops at the stop position 200. The photographing is switched between the reading of the end portion 31 and the reading of the rear end portion 31 for confirming the leading end portion 32 that has reached the predetermined position 300, and the detection is performed. Therefore, the steps of FIGS. 8A to 8C do not include the step of moving the single fixed camera detection device 71 corresponding to [s9] of FIG.

Here, instead of the two-point moving type camera detecting device 70 shown in FIGS. 2A to 2C, two composite fixed

camera detecting devices

72a and 72b installed at a distance δ separate two points. 10A to FIG. 10C in which the positions are read separately, and the flowchart of FIG. 11 will be described.

In the detailed steps of FIG. 11, in order to detect the leading end 32 of the sheet-shaped optical functional film 3 reaching the predetermined position 300 located between the stop position 200 and the panel bonding position 100, [s9] of FIG. It is not necessary to move the fixed

camera detection devices

72a and 72b of the complex so as to move the two-point movement type camera detection device 70 as shown. The steps shown in FIG. 11 use the composite fixed

camera detection devices

72a and 72b that read two points separately, and first, at [s1] in FIG. 11, the sheet-like optics stop at the stop position 200 by the fixed camera detection device 72b. The rear end portion 31 is read to confirm the front end portion 32 of the functional film 3, and then the leading end of the sheet-shaped optical functional film 3 reaching the predetermined position 300 by the fixed camera detection device 72 a in [s 11] of FIG. In order to confirm the portion 32, the rear end 31 of the sheet-like optical function film 3 is read, and the position of the front end 32 is detected. Therefore, the steps of FIGS. 10A to 10C do not include the step of moving the complex-fixed type

camera detection devices

72a and 72b as in [s9] of FIG.

Returning to the steps of FIGS. 2A to 2C or the flowchart of FIG. 3, a two-point moving type camera detection device 70, a wide-field type single fixed camera detection device 71, and two complex fixed

camera detection devices

72a , 72b, etc., the first to sixth embodiments of the present invention will be described below with reference to FIGS. 2A to 2C and FIG.

2B (d1) and (d2) show that the carrier film 2 is conveyed while being folded at the top 61 of the peeling body 60, thereby peeling off the sheet-like optical functional film 3 together with the pressure-sensitive adhesive layer 4, and From the stop position 200 on the peeling body 60 to the panel bonding position 100 where the pair of

bonding rollers

51 and 52 are opened so that the leading end portion 32 of the optical function film 3 overlaps the panel member 5 which stands by without stopping. This represents a process C to be sent toward.

［[S10] in FIG. 3 is a step of sending the leading end portion 32 of the sheet-shaped optical functional film 3 from the stop position 200 on the peeling body 60 toward the panel member 5 waiting at the panel bonding position 100. The delivery speed v1 of the sheet-shaped optical functional film 3 for sending out the sheet-shaped optical functional film 3 is preferably 5 mm / s to 10 mm / s as shown in FIG. The leading end portion 32 of the sheet-shaped optically functional film 3 that has been sent out is superimposed on the panel member 5 that is on standby without stopping.

2B (e1) and (e2) show that the leading end 32 of the sheet-shaped optical functional film 3 is placed on the release body 60 by monitoring the distance δ of the feed length of the rear end 31 of the sheet-shaped optical functional film 3. Represents a step H of detecting that a predetermined position 300 between the stop position 200 and the panel bonding position 100 has been reached. This is shown in [s13] of FIG. 3 as a step in which the leading end 32 of the sheet-shaped optical functional film 3 reaches the predetermined position 300. FIG. 2B (e1) or [s14] of FIG. 3 also represents a step of starting the closing operation of the pair of sticking

rollers

51 and 52 that are opened and closed.

As shown in [s11] and [s12] in FIG. 3, the transport speed of the optical function film 3 is sent out until the leading end portion 32 of the sheet-like optical function film 3 reaches a predetermined position 300 just before the panel bonding position. The technical intention of switching from the speed v1 to the sticking start speed v2 with the panel member 5 is that the closing operation of the sticking

rollers

51 and 52 is signaled when the leading end 32 of the sheet-shaped optical functional film 3 is detected at the predetermined position 300. Starts, the speed switching after the leading end 32 of the sheet-shaped optical functional film 3 is detected at the predetermined position 300 is eliminated, so that the leading end 32 of the sheet-shaped optical functional film 3 is reliably and stably. This is because the front end portion 32 of the sheet-shaped optically functional film 3 and the panel member 5 are sandwiched between the sticking

rollers

51 and 52 at the same time as being stacked on the panel member 5 without stopping. That.

The sticking start speed v2 is a feed speed of the sheet-shaped optical functional film 3 when the leading end portion 32 of the sheet-shaped optical functional film 3 is overlaid on the panel member 5, and is shown in Example 3 or Example 5 in FIG. As described above, the delivery speed v1 can be the same as the delivery speed v1, but it is preferable that the first and second embodiments be performed until the leading end portion 32 of the sheet-shaped optical functional film 3 reaches the predetermined position 300 just before the panel bonding position. 2. As in Example 4 or Example 6, the sticking start speed v2 is set to be lower than the sending speed v1, that is, in a state of v2 <v1.

The sticking start speed v2 of the sheet-shaped optical functional film 3 which is simultaneously sent and nipped by the pair of sticking

rollers

51 and 52 that are closed is more specifically, as shown in FIG. 2B (f1). Since the leading end portion 32 of the optical function film 3 is overlapped on the panel member 5 without stopping, it is more preferably less than 10 mm / sec.
Further, it is preferable that the pair of attaching

rollers

51 and 52 rotate at the same speed as the attaching start speed v2 of the sheet-shaped optical functional film 3 before sandwiching the sheet-shaped optical functional film 3 and the panel member 5. By rotating at the same speed v2 before the holding, the speed difference at the moment when the attaching

rollers

51 and 52 come into contact with the sheet-shaped optical functional film 3 and the panel member 5 hardly occurs, and the attaching accuracy can be further improved.

FIGS. 2B (f1) and (f2) show the panel bonding of the leading end portion 32 of the sheet-shaped optical functional film 3 at the delivery speed v1 adjusted from the stop position 200 on the peeling body 60 to a speed higher than the bonding start speed v2. The panel member 5 is sent out toward the position 5 and switches from the sending speed v1 to the sticking start speed v2 before reaching the predetermined position 300 between the stop position 200 on the peeling body 60 and the panel sticking position 100, and further waits. Represents a step I of overlapping without stopping.

FIG. 2B (f1) further shows the two-point movement type camera detection device 70 shown in FIG. 2A (b1) by using the rear end corresponding to the time when the front end 32 of the sheet-shaped optical functional film 3 reaches the predetermined position 300. Step of retreating by δ from the position for reading 31 to the position for reading the trailing end 31 corresponding to the stop position 200 of the leading end 32 of the sheet-shaped optical functional film 3 and returning to the position shown in FIG. 2A (a1) Represents This is the step shown in [s15] of FIG.

FIGS. 2C (g1) and (g2) show a pair of sticking rollers 51 that rotate while closing and rotating at the same time as the leading end 32 of the sheet-shaped optical functional film 3 is stacked on the sticking surface of the panel member 5 without stopping. 52 shows a process in which the sheet-shaped optical functional film 3 and the panel member are sandwiched by 52 and further bonded together at a bonding start speed v2.

As shown in FIG. 2C (g1) and (h1), the leading end portion 32 of the sheet-shaped optical functional film 3 is sandwiched between a pair of attaching

rollers

51 and 52 that operate to close, and the sheet-shaped optical functional film 3 and a panel member The laminating speed of the pair of

laminating rollers

51 and 52 that is closed when the lamination with the lamination 5 reaches the predetermined length λ is from the lamination start speed v2 to a lamination operation higher than the lamination start speed v2. The speed is switched to the speed v3. Thereby, the productivity in the step of bonding the sheet-shaped optical functional film 3 and the panel member 5 is further enhanced. This is the step shown in [s17] of FIG.

において In the embodiment of the present invention, the relationship between the delivery speed v1, the sticking start speed v2, and the sticking operation speed v3 is as follows.

The delivery speed at which the leading end portion 32 of the sheet-shaped optical functional film 3 is sent out from the stop position 200 of the peeling body 60 toward the panel bonding position 100 is v1. Preferably, the feeding speed v1 of the sheet-shaped optical functional film 3 is maintained until the leading end 32 reaches a predetermined position 300 between the stop position 200 on the peeling body 60 and the panel bonding position 100, and the predetermined position 300 Is switched to the pasting start speed v2 immediately before More preferably, the sticking start speed v2, which is equivalent to the sticking speed of the pair of sticking

rollers

51 and 52 that perform the closing operation, is set such that the distance of sticking between the sheet-shaped optical functional film 3 and the panel member 5 is a predetermined length λ. It is maintained until it reaches, and when it reaches the predetermined length λ, it is further switched to the bonding operation speed v3.

Therefore, the speeds of v1 to v3 are as shown in the first to sixth embodiments of FIG.
v1 ≧ v2, v3≫v1
V1> v2, v3≫v1 from the viewpoint of productivity
It is preferable to have the following relationship.

2C (h1) and (h2) show that the next leading end 32 of the sheet-shaped optical functional film 3 supported on the carrier film 2 to be bonded to the next panel member 5 is at the stop position 200 on the peeling body 60. When reaching, the next leading end 32 of the sheet-shaped optical functional film 3 whose feeding is stopped by the feeding device 8 shown in FIG. 1 and the pair of sticking

rollers

51 and 52 which rotate by closing operation. v3 represents a step F of cutting off the rear end portion 31 of the preceding sheet-shaped optical functional film 3 which is adhered to the panel member 5 and conveyed.

This is because, in [s18] of FIG. 3, the bonding operation of the sheet-shaped optical functional film 3 and the panel member 5 by the pair of

bonding rollers

51 and 52 that rotate by closing operation is continued, while the feeding illustrated in FIG. 1 is performed. The winding operation of the carrier film 2 is stopped by the device 8, and the next leading end portion 32 of the sheet-shaped optical functional film 3 is stopped at the stop position 200 on the peeling body 60. It is shown as the step of trimming the part 31 and the next tip 32.

2C (i1) and (i2) are the final steps of an embodiment of the present invention, shown as steps [s19] and [s20] in FIG. 3, which comprise a pair of closed and rotating When the

pasting rollers

51 and 52 operate at the pasting operation speed v3 and the pasting of the sheet-like optical functional film 3 and the panel member 5 as the preceding panel member with the sheet-like optical functional film is completed, a pair of closing operation is performed. This represents a final step G of switching the attaching

rollers

51 and 52 to the opening operation.

Therefore, the final step G is in the state shown in FIG. 2A (a1) and (a2). That is, the position and the angle of the leading end 32 of the next sheet-shaped optical functional film 3 stopped at the stop position 200 are checked by the two-point moving type camera detection device 70, while the pair located at the panel bonding position 100 is checked. The

pasting rollers

51 and 52 are opened, and the next panel member 5 waits at the pre-sticking position 600 and is ready to be conveyed to the panel joining position 100 of the opened pair of joining

rollers

51 and 52. Then, each step of laminating the next sheet-shaped optical functional film 3 and the next panel member 5 is started subsequently.
The same applies to the other surface of the panel member with a sheet-like optical function film obtained by bonding the sheet-like optical function film 3 to one surface of the panel member 5 obtained in steps [s1] to [s20] of the present invention. By performing the steps [s1] to [s20] of the present invention, it is possible to manufacture an optical display device in which the sheet-shaped optical functional films 3 are bonded to both surfaces of the panel member 5.

Here, when the examples and comparative examples are summarized in FIG. 4 again, the technical problem of the present invention shown in Examples 1 to 6 is that the adhesive layer 4 of the sheet-shaped optically functional film 3 has a deformed adhesive streak. The technical solution for achieving this is to prevent the leading end portion 32 of the sheet-shaped optically functional film 3 from projecting from the top 61 of the peeling body 60, that is, to make the peeling body without cueing. 60 at a stop position 200.

Next, the front end portion 32 of the sheet-shaped optical functional film 3 once sent out from the stop position 200 is stacked without stopping on the panel member 5 waiting at the panel bonding position 100, and a pair of bonding members that close and operate in conjunction with each other. The sheet is fed without stopping until the rear end 31 of the sheet-shaped optical functional film 3 is cut off from the leading end 32 of the next sheet-shaped optical functional film 3 by being sandwiched and bonded by the

rollers

51 and 52. That is to continue.

Further, the leading end 32 of the sheet-shaped optical functional film 3 sent from the stop position 200 on the peeling body 60 is preferably continuously fed without stopping at three different speeds. is there. The first speed is a delivery speed v1 that is a speed during a first stroke from the stop position 200 on the peeling body 60 to the panel bonding position 100 to a predetermined position 300, that is, a distance δ.

Next, the second speed during the second stroke from the predetermined position 300 until the bonding of the sheet-shaped optical function film 3 and the panel member 5 reaches the predetermined length λ is preferably lower than the sending speed v1. The start speed v2 is selected. The technical intention is that the leading end portion 32 of the sheet-shaped optical functional film 3 is superimposed on the panel member 5 previously conveyed to the panel bonding position 100 where the pair of opened

bonding rollers

51 and 52 are located. At the same time, the sheet-like optical functional film 3 and the panel member 5 are sandwiched by the pair of attaching

rollers

51 and 52 that have been closed so far, and the feeding of the sheet-like optical functional film 3 is stopped. In other words, the adjustment is performed so that the sheets are stuck at the sticking start speed v2 without being applied. If the sticking start speed v2 is too fast, the adjustment becomes more difficult.

Furthermore, when the bonding between the sheet-shaped optical functional film 3 and the panel member 5 reaches the predetermined length λ, the subsequent speed can be switched to the normal high-speed bonding operation speed v3. This is because, as shown in FIG. 4, the "sticking" phenomenon does not occur.

Incidentally, the length δ of the first stroke is about 15 to 25 mm, and the length η of the second stroke is a length γ from the predetermined position 300 to the panel bonding position 100 and a predetermined length λ, and (γ + λ) Is about 3 to 15 mm, γ is about 1 to 5 mm, and λ is about 1 to 10 mm.

Looking at each embodiment, in the first embodiment, the sending speed v1 is switched from 10 mm / s to the pasting start speed v2 just before the predetermined position 300 to about 1/3 of 3 mm / s. When the leading end portion 32 of the sheet-shaped optical functional film 3 reaches λ from the start, that is, when it reaches the length η of the second stroke, the laminating operation speed v3 is switched to a high speed of 200 mm / s to respond. I have.

{Circle around (2)} Example 2 has almost the same correspondence, except that the sticking start speed v2 of 3 mm / s is set to slightly faster 5 mm / s. Also, the fourth embodiment does not differ greatly from these. The difference from the first embodiment is that the sending speed v1 of 10 mm / s is set slightly lower at 7 mm / s, and the sticking start speed v2 of 3 mm / s is set slightly higher at 5 mm / s.

は All of these results show that no glue streaks are generated, the standard value of the gap is achieved, and the productivity is good. On the other hand, in Example 3, since the sticking start speed v2 was too fast as 10 mm / s, the leading end 32 of the sheet-shaped optical functional film 3 was overlapped on the waiting panel member 5 at the speed of v2. At the moment when the sheet is nipped between the pair of sticking

rollers

51 and 52, the sheet is likely to be misaligned and no adhesive streak is generated, but this affects the misalignment.

{Example 5} It has been confirmed that the output speed v1 is reduced to 5 mm / s, which has a slight effect on productivity. In Example 6, no glue streak was generated. However, in contrast to the high-speed laminating operation speed v3 of 200 mm / s employed in the other examples, a 1/40 low-speed 5 mm / s was employed. As a result, productivity is affected.

In Comparative Example 1 to Comparative Example 3 shown in FIG. 4, in a method of manufacturing an RTP type optical display device, a front end portion 32 of a sheet-shaped optical functional film 3 is formed by a panel member in order to realize required bonding accuracy. 5 to 7, there is a technical problem in how to precisely position the sheet 3 from the top 61 of the peeled body 60 from the top 61 of the peeled body 60, as shown in FIGS. It will stop in the state where it was issued.

Specifically, FIG. 5 detects the leading end of the sheet-shaped optical functional film 3 stopped in a fixed cue state from the top 61 of the peeling body 60, and from the detection position of the leading end to the panel bonding position 100. This shows a method in which the sheet-shaped optical functional film 3 is fed and bonded by accurate positioning with the panel member 5. FIG. 6 shows that the leading end of the next sheet-shaped optical functional film 3 after the preceding laminating step is stopped at the panel bonding position 100 in a crawling state, and is detected before and after the sheet-shaped optical functional film 3. This is a method of finely adjusting the feed of the sheet and bonding the sheets by more accurate positioning with the panel member 5. Further, FIG. 7 shows that the leading end of the next sheet-shaped optical functional film 3 after the preceding laminating step is rewound to the feeding position provided on the upstream side from the top 61 of the peeling body 60 to detect the leading end. And a method in which the sheet-shaped optical functional film 3 is fed from the feeding position to the panel bonding position 100, stopped in the cueing state, and then bonded by accurate positioning with the panel member 5.

In the case of the comparative examples shown in FIGS. 5 to 7, as shown in FIG. 4, the accuracy of the sticking deviation is clear, but since all stop after cueing, deformation of the adhesive streaks in the adhesive layer. The consequences are unavoidable.

2 Carrier Film 3 Sheet Optical Function Film 31 Rear End of Sheet Optical Function Film 32 Tip of Sheet Optical Functional Film 4 Adhesive Layer 5 Panel Member
Reference Signs List 10 Apparatus for manufacturing optical display device by RTP method 51 Adhering roller 52 Adhering roller 60 Peeling body 61 Top of peeling body 70 Camera detecting device 71 Camera detecting device 72a Camera detecting device 72b Camera detecting device 8 Feeding of sheet-shaped optical functional film Apparatus 80 Forward / reverse feed roller 81 Forward / reverse feed roller 82 Dancer roller 90 Suction / conveyance means 91 Detection means
100 Panel bonding position 200 Stop position 300 Predetermined position 500 Tip position 600 Position before bonding
800 control device 802 storage device

Claims

A carrier film, a pressure-sensitive adhesive layer formed on one surface of the carrier film, and a band-like sheet including a plurality of sheet-shaped optical functional films continuously supported on the carrier film via the pressure-sensitive adhesive layer. From the carrier film of the optical film laminate, the tip of the sheet-shaped optical functional film is sent to a panel bonding position while the sheet-shaped optical functional film is peeled together with the adhesive layer, and is conveyed to the panel bonding position. A method of manufacturing an optical display device by sandwiching and bonding the sheet-shaped optical functional film and the panel member with a pair of sticking rollers that overlap and move the opening and closing, and
The tip of the sheet-shaped optical functional film supported on the carrier film, on the release body without projecting from the top of the release body having a top arranged at a position facing the panel bonding position Stopping at a stop position;
Conveying the panel member to the panel bonding position where the pair of bonding rollers is opened, stopping, and waiting.
By transporting the carrier film while folding it at the top of the release body, the panel member that stands by at the leading end of the sheet-shaped optical functional film while peeling the sheet-shaped optical functional film together with the adhesive layer. Sending from the stop position on the peeling body to the panel bonding position so as to overlap without stopping on,
By detecting that the leading end of the sheet-shaped optical functional film sent without stopping reaches a predetermined position between the stop position on the peeling body and the panel bonding position, the sheet-shaped optical function film is detected. Before the front end of the functional film overlaps the panel member waiting at the panel bonding position, a step of switching and closing the pair of application rollers in an open state, and the pair of application rollers performing the closing operation, At the same time as overlapping the leading end of the sheet-shaped optical functional film on the panel member, sandwiching the sheet-shaped optical functional film and the panel member sent without stopping, and bonding,
The next leading end of the sheet-shaped optical functional film stopped when the next leading end of the sheet-shaped optical functional film supported on the carrier film reaches the stop position on the release body, and the next leading end of the stopped sheet-shaped optical functional film. And, the step of cutting off the rear end of the sheet-shaped optical functional film that is adhered to the panel member and conveyed by the rotation of the pair of attaching rollers that rotates in the closing operation,
A method for manufacturing an optical display device, comprising a step of opening the pair of attaching rollers after the sheet-shaped optical functional film and the panel member are attached by the pair of attaching rollers.
The sheet-like optical function film and the panel member are sandwiched, and, the pair of pasting rollers to be pasted, before sandwiching the sheet-like optical function film and the panel member, the sheet-like optical function film 2. The method for manufacturing an optical display device according to claim 1, wherein the front end rotates at the same speed as the feed speed of the sheet-like optical functional film when the front end is superimposed on the panel member.
By monitoring the feed distance of the rear end of the sheet-shaped optical functional film, the leading end of the sheet-shaped optical functional film is moved to a predetermined position between the stop position on the peeling body and the panel bonding position. The method for manufacturing an optical display device according to claim 1, wherein the arrival is detected.
The sticking start speed v2 of the sheet-shaped optical functional film, which is sent at the same time that the leading end of the sheet-shaped optical functional film is overlapped with the panel member and nipped by a pair of sticking rollers, is less than 10 mm / sec. 4. A method for manufacturing the optical display device according to any one of 1 to 3.
When the sheet-shaped optical function film and the panel member are bonded to each other by a predetermined length while being pinched by the pair of bonding rollers, the bonding speed of the pair of bonding rollers is changed to the bonding start speed v2. 5. The method for manufacturing an optical display device according to claim 4, further comprising the step of: switching the laminating operation speed v3 to a laminating operation speed v3 higher than the laminating start speed v2, and further laminating the sheet-shaped optical functional film and the panel member.
The leading end of the sheet-shaped optical functional film is sent from the stop position on the peeling body toward the panel laminating position at a delivery speed v1 adjusted to a speed higher than the lamination start speed v2. Before reaching a predetermined position between the stop position and the panel bonding position, switching from the delivery speed v1 to the bonding start speed v2, and further stacking the panel member on the panel member which stands by at the front end without stopping. A method for manufacturing an optical display device according to claim 4, comprising:
The delivery speed v1 for sending the tip portion from the stop position on the peeling body toward the panel bonding position, and before reaching a predetermined position between the stop position on the peeling body and the panel bonding position. The bonding start speed v2 switched from the delivery speed v1 and the bonding speed of the pair of bonding rollers when the bonding between the sheet-shaped optical functional film and the panel member reaches a predetermined length. The bonding operation speed v3 switched from the bonding start speed v2,
v1 ≧ v2, v3≫v1
7. The method for manufacturing an optical display device according to claim 6, wherein the method has the following relationship.