JP2002023151A - Method and device for manufacture of liquid crystal display device having polarizing plate - Google Patents

Method and device for manufacture of liquid crystal display device having polarizing plate

Info

Publication number
JP2002023151A
JP2002023151A JP2000211396A JP2000211396A JP2002023151A JP 2002023151 A JP2002023151 A JP 2002023151A JP 2000211396 A JP2000211396 A JP 2000211396A JP 2000211396 A JP2000211396 A JP 2000211396A JP 2002023151 A JP2002023151 A JP 2002023151A
Authority
JP
Japan
Prior art keywords
polarizing plate
means
liquid crystal
crystal display
display device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2000211396A
Other languages
Japanese (ja)
Inventor
Yoshitake Sakami
良武 酒見
Original Assignee
Toshiba Corp
株式会社東芝
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, 株式会社東芝 filed Critical Toshiba Corp
Priority to JP2000211396A priority Critical patent/JP2002023151A/en
Publication of JP2002023151A publication Critical patent/JP2002023151A/en
Application status is Pending legal-status Critical

Links

Abstract

(57) [Summary] [PROBLEMS] To reduce the number of operations for attaching a polarizing plate 3 in a method and an apparatus for manufacturing a liquid crystal display device in which a polarizing plate is attached to an outer surface of a display panel 5.
Provided is a device that can reduce the cycle time for pasting. An adhesive / suction stage is used in which an adhesive tape is stretched between rollers at both ends like a belt of a belt conveyor. After the polarizing plate 3 with the protective film 4 adhered to the lower surface is placed and adhered on the adhesive / suction stage 1 in a positioned state, the polarizing plate 3 is transferred to the stage 2 with a pressing roller, and at the same time, Peeling of the protective film 4 from the polarizing plate 3 is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display device in which a polarizing plate is attached to an outer surface of a display panel, and a manufacturing apparatus used for the same.

[0002]

2. Description of the Related Art In recent years, flat display devices that replace CRT displays have been actively developed. In particular, liquid crystal display devices can achieve a low profile, light weight, and low power consumption. ,
The market is rapidly expanding to portable information terminals and display devices for mobile phones.

A liquid crystal display device capable of matrix display is
In the case of the transmission type, the display panel includes a display panel having a liquid crystal layer between a pair of transparent insulating substrates, and a polarizing plate attached to a display surface and a back surface of the display panel. Then, by controlling the polarization state by driving the liquid crystal layer for each pixel arranged in a matrix, the transmitted light is controlled for each pixel.

In the case of a reflection type liquid crystal display device, a polarizing plate is attached to at least a transparent insulating substrate on the display surface side.

In general, a polarizing plate has a polarizing layer having a polarizing action, which is held and protected from both sides by a support film, and is attached to the outer surface of a display panel via an adhesive layer disposed on one side. . The polarizing plate is usually used for assembling a liquid crystal display in a state where a protective film is covered on the surface of the adhesive layer.

A process for attaching a polarizing plate to a display panel in the prior art will be described with reference to FIGS.

The polarizing plates 3 are taken out one by one from the polarizing plate stocker 61 by the polarizing plate take-out device 62 and sent to the positioning receiving stage 71 between the foreign matter removing rollers 63. Gauging mechanisms 72 and 73 are provided on the positioning receiving stage 71, and the polarizing plate 3 holds the gaging mechanism 7 while being sandwiched between the positioning receiving stage 71 and the positioning suction stage 74.
The positioning is performed with respect to the positioning suction stage 74 by the components 2 and 73. After the polarizing plate 3 is attracted to the positioning suction stage 74 in such a position, the polarizing plate 3 is moved onto the pressing roller stage 2 by moving the positioning suction stage 74 and releasing the suction.

The polarizing plate 3 thus transferred onto the stage 2 with the pressing roller is attracted to the stage 2 with the pressing roller in a positioned state. Then, as shown in FIG. 4, the peeling device 15 including the adhesive tape 11 and the roller mechanism is applied to the upper surface of the polarizing plate 3, and the operation of peeling the adhesive layer protective film 4 from the polarizing plate 3 is performed.

After the adhesive layer protective film 4 has been completely peeled off, the peeling device 15 is pulled back to the standby position.
Next, the pressing roller side end of the stage 2 with the pressing roller is lifted upward, and the edge of the polarizing plate 3 that rides on the pressing roller 21 is pressed against the display panel 5 held by the display panel suction stage 55. . In this state of being pressed, the stage 2 with the pressing roller is gradually pushed and moved so as to horizontally move to the outside (the right side in FIG. 4) on the side of the pressing roller 21 so that the polarization on the display panel 5 is obtained. Board 3
Is pasted.

As described above, the processing cycle time (cycle time) in which the polarizing plate 3 is pressed and processed on the stage 2 with rollers is the time required for the next series of operations.

(1) Receiving and sucking from the positioning suction stage 74 → (2) Movement of the stage 2 with the pressing roller to below the display panel suction stage 55 → (3) Peeling device 15 on the stage 2 with the pressing roller Movement → (4) Peeling of the protective film 4 by the peeling device 15 →
(5) Movement of the peeling device 15 from above the stage 2 with the pressing roller → (6) Incline of the stage 2 with the pressing roller → (7) Pasting of the polarizing plate 3 by moving the stage 2 with the pressing roller → (8) Pressing Release of the inclination of the stage with roller 2 and movement to a position for receiving the polarizing plate 3.

[0012]

In the pasting operation of a polarizing plate according to the prior art, since there are many processing operations in one cycle as described above, one cycle time is lengthened by that much. The processing efficiency of the device was low. For this reason, in order to improve the processing capacity, a plurality of facilities are required, for example, the facility cost is increased, and the investment efficiency is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in a method and an apparatus for manufacturing a liquid crystal display device having a polarizing plate, the number of operations for attaching the polarizing plate is reduced. Provide a device that can reduce the cycle time for mounting.

[0014]

According to a first aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, comprising: attaching a polarizing plate to at least one surface of a display panel via an adhesive layer. Then, on a holding table with a pressing roller equipped with a polarizing plate pressing roller along one edge,
A polarizing plate attaching step of attaching one polarizing plate in a positioned state, a protective film peeling step of peeling the adhesive layer protective film from the polarizing plate, and the polarizing plate pressing by the polarizing plate pressing roller A pressing and sticking step of sticking the polarizing plate to the display panel by moving the holding table with a pressing roller with respect to the display panel while pressing the display panel against the display panel. In the production method, a step of holding the one polarizing plate in a state where the one polarizing plate is positioned is included in an adhesive holding unit having a surface provided with an adhesive layer sticking to the adhesive layer protective film, and the one polarizing plate is provided. When transferring from the adhesive holding unit to the holding table with a pressing roller, the polarizing plate attaching step and the protective film peeling step are performed simultaneously. It is characterized in.

With the above configuration, the number of operations for attaching the polarizing plate can be reduced, and the cycle time for attaching the polarizing plate can be shortened.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention are shown in FIGS.
This will be described with reference to FIG.

FIG. 1 is a schematic perspective view of a process for explaining a main part of a polarizing plate sticking operation according to an embodiment. FIG. 2 is a schematic front view process diagram for explaining the entire operation of attaching the polarizing plate according to the example. FIG. 3 is a schematic cross-sectional perspective view for explaining a laminated structure of a polarizing plate, a protective film attached thereto and a display panel.

As shown in FIG. 2, the polarizing plates 3 are taken out one by one from the polarizing plate stocker 61 by a polarizing plate take-out device 62 and passed between the foreign matter removing rollers 63 onto the positioning receiving stage 71. Is sent.

The positioning receiving stage 71 is provided with gauging mechanisms 72 and 73, and the polarizing plate 3 is sandwiched between the lower positioning receiving stage 71 and the upper positioning suction stage 74, and the gauging mechanisms 72 and 73 are provided. The positioning is performed with respect to the positioning suction stage 74 by 73. Specifically, the polarizing plate 3 is evenly pushed from both sides on the positioning stage 74 by the positioning head 72 and is arranged at a predetermined position.

The polarizing plate 3 is attracted to the positioning suction stage 74 from above in a positioned state, and is then transferred to the transfer position by the positioning suction stage 74 while being sucked and suspended as described above. .

The above operation is exactly the same as that of the prior art, except that the polarizing plate 3 is taken out of the polarizing plate stocker 61 with the protective film 4 disposed on the lower surface, and the processing is performed while maintaining this orientation. Done.

At the transfer position from the positioning suction stage 74 to the adhesive / suction stage 1, the positioning suction stage 74 is slightly pulled down by the driving of the cylinder 75, and the polarizing plate 3 is moved to a predetermined position on the upper surface of the adhesive / suction stage 1. Pressing and positioning suction stage 7
4, the adsorption of the polarizing plate 3 is released.

The adhesive / suction stage 1 includes a suction stage 13 having a suction mechanism, two adhesive tape feed rollers 12 arranged along both edges thereof, and an adhesive stage bridged between the adhesive tape feed rollers 12. And a tape 11. At the time of winding drive, the adhesive tape 11 is wound at a predetermined speed by a winding roller 14 via an adhesive tape feeding roller 12 on a sending side (right side in the drawing).

When the polarizing plate 3 is pressed against the upper surface of the adhesion / suction stage 1 by the positioning suction stage 74, the polarizing plate 3 is attached to the adhesive tape 1. At this time, the suction stage 13 sucks and holds the polarizing plate 3 so that the polarizing plate 3 cannot be displaced. In this way, the polarizing plate 3 is arranged at a predetermined position on the adhesive / suction stage 1.

Next, the adhesive / suction stage 1 holding the polarizing plate 3 moves to a transfer position 25 to the stage 2 with a pressing roller.

As shown in FIG. 1, a stage 2 with a pressing roller is superposed on an adhesive / suction stage 1 with a polarizing plate 3 interposed therebetween. Then, the polarizing plate 3 is suctioned from above by the stage 2 with the pressing roller, and the suction by the lower suction stage 13 is released. At this time, the polarizing plate 3 is arranged so that one edge portion thereof covers the pressing roller 21.

In this state, the stage 2 with the pressing roller is gradually moved horizontally to the side of the pressing roller 2 (to the right in the figure). That is, the stage 2 with the pressing roller gradually retracts to the attaching position 26 where the polarizing plate 3 is attached. At this time, the winding roller 14 is driven to wind the adhesive tape 11 in accordance with the retreat speed of the stage 2 with the pressing roller. That is, the adhesive tape 11 is fed only by the size of the retreat of the stage 2 with the pressing roller.

In this manner, the protective film 4 attached to the lower surface of the polarizing plate 3 is gradually peeled off together with the adhesive tape 11. The peeling of the protective film 4 is completed when the polarizing plate 3 is completely transferred from the adhesive / holding stage 1 to the stage 2 with a pressing roller. Therefore, at the same time when the polarizing plate 3 is transferred from the adhesive / holding stage 1 to the stage 2 with a pressing roller,
The peeling of the protective film 4 is performed.

After the transfer and the peeling are completed, the stage 2 with the pressing roller having the polarizing plate 3 suctioned to the lower surface is further moved to a position on the display panel suction stage 55, that is, a bonding position 26.

At the sticking position 26, the stage 2 with the pressing roller is driven by a vertically moving cylinder 22 connected to the vicinity of the pressing roller 21, and a rotating shaft provided on the opposite edge of the pressing roller 21 is driven. It turns around 23 and tilts. In this way, the edge of the polarizing plate 3 applied to the pressing roller 21 is pressed against the upper surface of the display panel 5 on the display panel suction stage 55. In this state, the stage 2 with the pressing roller gradually moves horizontally to the side of the peeling / transferring position 25 (to the left in the drawing), that is, gradually advances to the peeling / transferring position 25. Then, the polarizing plate 3 is attached to the display panel 5. At this time, the polarizing plate 3
Will slide on the lower surface of the stage 2 with the pressing roller while being gently sucked by the stage 2 with the pressing roller.

As described above, the process of handling the polarizing plate 3 on the stage 2 with the pressing roller is as follows: (1) The transfer from the adhesive / suction stage 1 at the peeling / transferring position 25 and the simultaneous processing. Protective film 4
Peeling off → (2) Movement to application position → (3) Incline of stage 2 with pressing roller → (4) → Adhesion of polarizing plate 3 by moving stage 2 with pressing roller → (5) Stage with pressing roller 2 and the movement to the peeling / transfer position 25 for receiving the polarizing plate 3.
As compared with the above-mentioned prior art example, the peeling device 15 (FIG. 4)
The waiting time for the operation of the stage 2 with rollers, which is equivalent to the operation time required for the movement of (5) to (5), is omitted. Also,
The time for transferring the polarizing plate 3 from the adhesive / suction stage 1 to the stage 2 with the roller and for peeling off the protective film 4 is about the same as the time required for peeling off the protective film 4 by the peeling device 15 of the prior art. Therefore, the cycle time could be reduced by the operation time required for moving the peeling device 15 (FIGS. 4 and 5).

According to the polarizing plate sticking method of the above embodiment, the polarizing plate is transferred from the transporting means for transporting the polarizing plate in a positioned state to a stage with a pressing roller, and at the same time protecting the adhesive layer from the polarizing plate. Since the film can be peeled off, the number of operations can be reduced, the process equipment can be simplified, and the cycle time for attaching the polarizing plate can be significantly reduced. in particular,
Operational interference between the device for peeling off the adhesive tape and the device for transporting the polarizing plate can be eliminated, and waste of processing operation and processing time can be eliminated.

In the above embodiment, the polarizing plate 3 is attached to the display panel 5 with the display panel 5 held upward by the lower holding means and the polarizing plate 3 held downward by the upper holding means. However, it is exactly the same as above when the attachment is performed while the polarizing plate 3 is held upward by the lower holding means.

Further, it has been described that the polarizing plate 3 is conveyed by moving the entire sticking / sucking stage 1 with the polarizing plate 3 attached to the sticking / sucking stage 1. With the adhesive tape 11 adhered to the adhesive tape 11, like a belt of a belt conveyor,
Can also be conveyed by sending.

[0035]

According to the method and the apparatus for manufacturing a liquid crystal display device in which a polarizing plate is attached to the outer surface of a display panel, the number of operations for attaching the polarizing plate is reduced, and the cycle time for attaching the polarizing plate is reduced. Can be shortened.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view illustrating a process of attaching a polarizing plate according to an example.

FIG. 2 is a schematic front view process diagram for explaining the entire operation of attaching a polarizing plate according to an example.

FIG. 3 is a schematic sectional perspective view for explaining a display panel and a polarizing plate.

FIG. 4 is a schematic perspective view illustrating a process of attaching a polarizing plate according to a conventional technique.

FIG. 5 is a schematic front view process diagram for explaining the entire operation of attaching a polarizing plate according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adhesion / suction stage 11 Adhesive tape 12 Feed roller 13 Suction stage which constitutes an adhesion / suction stage 14 Take-up roller 2 Stage with pressing roller 21 Pressing roller 3 Polarizing plate 4 Adhesive layer protection film 5 Display panel 55 Display panel suction stage

Claims (8)

[Claims]
1. A method for manufacturing a liquid crystal display device comprising a polarizing plate attached to at least one surface of a display panel via an adhesive layer, comprising: a polarizing plate pressing roller provided along one edge. A polarizing plate attaching step of attaching one polarizing plate in a state where it is positioned on a holding table with rollers; a protective film peeling step of peeling an adhesive layer protective film from the polarizing plate; A pressing and sticking step of sticking the polarizing plate to the display panel by moving the holding table with the pressing roller with respect to the display panel while pressing the polarizing plate against the display panel by pressing the pressing roller. In a method for manufacturing a liquid crystal display device, the adhesive holding means provided on the surface with an adhesive layer that adheres to the adhesive layer protective film, the one sheet Including a step of holding the polarizing plate in a positioned state, when transferring the one polarizing plate from the adhesive holding means to the holding table with a pressing roller, the polarizing plate attaching step and the protective film peeling step And (c) are simultaneously performed.
2. The method for manufacturing a liquid crystal display device according to claim 1, wherein said adhesive holding means is a conveying means for conveying said polarizing plate to a transfer position to said holding table with a pressing roller. .
3. The adhesive holding means comprises an adhesive tape continuous in a strip shape, and an adhesive tape feeding / winding roller for feeding and winding the adhesive tape. 2. The liquid crystal display device according to claim 1, wherein the adhesive tape is fed and wound by a size corresponding to the movement of the holding means with the pressing roller with respect to the means.
4. The method for manufacturing a liquid crystal display device according to claim 1, wherein the holding table with the pressing roller is moved to a position where the display panel is held after the transfer.
5. A positioning step of, after taking out the polarizing plates one by one from a polarizing plate stocker, performing positioning with respect to the positioning holding table while holding the one polarizing plate with the positioning holding table, 2. The method for manufacturing a liquid crystal display device according to claim 1, wherein the liquid crystal display device is transferred from the positioning holding table to the adhesive holding table in a positioned state.
6. The method for manufacturing a liquid crystal display device according to claim 1, wherein said holding table with a pressing roller includes an adsorbing means for adsorbing said polarizing plate.
7. A manufacturing apparatus for a liquid crystal display device, wherein a polarizing plate is attached to at least one surface of a display panel via an adhesive layer, wherein the polarizing plates are taken out one by one and the polarizing plate is positioned. Positioning / acquisition means for acquiring, transport means for receiving the polarizing plates positioned one by one from the positioning / acquisition means, and peeling means for peeling off the adhesive layer protective film attached to one surface of the polarizing plate A device for manufacturing a liquid crystal display device, comprising: pressing and attaching means for pressing and attaching the polarizing plate to a display panel after peeling by the peeling means, wherein the transporting means includes the peeling means. An apparatus for manufacturing a liquid crystal display device, wherein the polarizing plate is peeled off at the same time as transferring the polarizing plate from the conveying means to the pressing / sticking means.
8. The transfer means, which also serves as the peeling means, includes an adhesive tape feed roller along both edges, an adhesive tape spanned between the feed rollers, and the transfer means for transferring the polarizing plate. 8. The apparatus for manufacturing a liquid crystal display device according to claim 7, further comprising a winding device for winding the adhesive tape in accordance with the movement of the pressing / sticking means with respect to the means.
JP2000211396A 2000-07-12 2000-07-12 Method and device for manufacture of liquid crystal display device having polarizing plate Pending JP2002023151A (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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US7163599B2 (en) 2003-04-22 2007-01-16 Sharp Kabushiki Kaisha Method and apparatus for sticking polarizer to substrate
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CN104175002A (en) * 2013-05-20 2014-12-03 三星钻石工业股份有限公司 Cutting method of resign board pasted at glass substrate
TWI655761B (en) * 2013-05-22 2019-04-01 南韓商三星顯示器有限公司 Filled with a film of manufacturing an organic light emitting display apparatus of
CN105093576A (en) * 2015-07-16 2015-11-25 深超光电(深圳)有限公司 Attaching jig

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