JP2001042315A - Film sticking device for liquid crystal display element and film sticking method for liquid crystal display element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film sticking device for a liquid crystal display element obviates the generation of air bubbles and the adhesion of dust between polarizing plate films, does not damage the liquid crystal panels, allows high-speed processing and is capable of improving quality and production yield. SOLUTION: This film sticking device has a panel holding and driving means 10 which holds the liquid crystal panel 2 and rectilinearly drives the liquid crystal panel in a prescribed direction accompanying the operation to stick the polarizing plate film 1, a film holding and sticking means 20 which sticks the polarizing plate film 1 to the liquid crystal panel 2 by successively releasing the adhesion near the region where the liquid crystal panel 2 and the tacky adhesive material layer 1c of the polarizing plate film 1 abut on each other, a film supplying means 30 for supplying the polarizing plate film 1 in synchronization with the rotation of the film holding and sticking means 10 and a peeling means 40 for sticking a release tape 41 having the tacky adhesive material layer in synchronization with the rotation of the film holding and sticking means 10 and to the polarizing plate film 1 and exposing the tacky adhesive material layer 1c by releasing the release tape 41 from the polarizing plate film 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film sticking apparatus for a liquid crystal display element and a method for sticking a film for a liquid crystal display element for sticking a polarizing plate film to a liquid crystal panel.

[0002]

2. Description of the Related Art Conventionally, a film sticking apparatus for a liquid crystal display element for sticking a polarizing plate film to a liquid crystal panel has been known in which a release film of a polarizing plate film is peeled off at the stage of manufacturing a liquid crystal display panel, and an adhesive material is peeled off. After exposing the layer, it is used for attaching a polarizing plate film to a liquid crystal display panel.

For example, Japanese Patent Application Laid-Open No. 7-294902 discloses a polarizing plate temporarily fixed along a curved surface of a polarizing plate support so that an edge of the polarizing plate coincides with an edge of a liquid crystal panel. A technique is described in which a polarizing plate is attached to a liquid crystal display panel while the polarizing plate support is rotated and pressed by abutting and moving the liquid crystal panel.

Japanese Patent Application Laid-Open No. 9-146059 discloses that, when a polarizing plate film and a liquid crystal panel are attached to each other, air is blown from a nozzle when the polarizing plate slides and passes through a suction hole to hold the polarizing plate. Thus, there is described a technique of performing a work of attaching a polarizing plate film without mixing bubbles in a gap between the polarizing plate and the liquid crystal panel.

[0005]

However, in the conventional film sticking apparatus for a liquid crystal display element, the polarizing plate support is rotated by the movement of the liquid crystal panel support when the polarizing plate film is stuck. A pressing force that does not hinder the rotation of the body is required.

When the pressing force is reduced,
Since the rotational force of the polarizing plate support is obtained by the adhesive force of the polarizing plate, there is a possibility that a displacement or the like of the attaching position may occur. Therefore, when the polarizing plate film is attached to the liquid crystal panel while applying an external force, the micropearls contained in the liquid crystal may move due to the external force, and display unevenness may occur.

In the conventional method for preventing air bubbles from entering using an air nozzle, the polarizing plate is attached while holding the polarizing plate by suction, and when the polarizing plate film comes off the suction area during the sticking, the polarizing plate film that falls is prevented from falling. Air blow is performed from the air nozzle to prevent contact with the liquid crystal panel.However, because the polarizing plate film is attached while sucking the polarizing plate film until it comes out of the suction area, it is pressed against the sticking roller for the same reason as above. This necessitates the use of force and may cause display unevenness on the liquid crystal panel.

[0008] In the above-mentioned conventional technique, the adsorption of the polarizing plate is released during the attachment of the polarizing plate film (release to the atmosphere).
Therefore, there is a possibility that the polarizing plate film may be stuck to the liquid crystal panel before the end of the polarizing plate film is stuck, in which case bubbles are generated between the polarizing plate film and the liquid crystal panel. was there.

Furthermore, in the above-mentioned conventional technology, the release mechanism for releasing the release film that protects the adhesive layer of the polarizing plate film is provided at a position physically separated from the attaching mechanism for the polarizing plate film. When the plate support is moved by the moving mechanism, the state in which the adhesive layer is exposed lasts for a long time, and dust generated from the moving mechanism, dust in the atmosphere, etc. adhere to the exposed adhesive layer, thereby deteriorating quality and reducing product yield. There has been a problem that this leads to a decrease and, consequently, an increase in manufacturing cost.

Therefore, an object of the present invention is to provide a liquid crystal panel manufacturing process, in which no air bubbles or dust adhere between the liquid crystal panel and the polarizing plate film attached to the liquid crystal panel, and the liquid crystal panel is damaged. It is an object of the present invention to provide a film sticking apparatus for a liquid crystal display element and a method for sticking a film for a liquid crystal display element, which do not need to be performed.

Another object of the present invention is to provide a liquid crystal capable of performing high-speed processing, improving quality and improving product yield by performing a series of operations of supplying, peeling, and attaching a polarizing plate. An object of the present invention is to provide a film sticking apparatus for a display element and a method for sticking a film for a liquid crystal display element.

[0012]

Means for Solving the Problems To achieve the above object, an invention according to claim 1 is a film sticking apparatus for a liquid crystal display element for sticking a polarizing plate film to a liquid crystal panel, while holding the liquid crystal panel, A panel holding drive unit that linearly drives the liquid crystal panel in a predetermined direction in accordance with the attaching operation of the polarizing plate film, and a suction holding surface that holds the polarizing plate film by suction is disposed at substantially equal distances with respect to the center of the rotation axis. While having a curved surface position and rotating in synchronism with the linear driving of the panel holding and driving means, sequentially releasing the suction in the vicinity of the area where the adhesive layer of the liquid crystal panel and the polarizing plate film abuts. Means for attaching the polarizing plate film to the liquid crystal panel, and the polarizing plate film is synchronized with rotation of the film holding and attaching means. Film supply means for supplying the film, in synchronization with the rotation of the film holding and pasting means, affixing a release tape having the adhesive layer to the polarizing plate film, peeling the release film from the polarizing plate film. And peeling means for exposing the adhesive layer.

According to a second aspect of the present invention, in the film sticking apparatus for a liquid crystal display element according to the first aspect, the panel holding and driving means adsorbs to the film holding and sticking means in parallel with the sticking operation of the polarizing plate film. A clean air supply means for blowing clean air onto the held polarizing plate is provided.

According to a third aspect of the present invention, there is provided the first or second aspect.
In the film sticking apparatus for a liquid crystal display element described in the above, a plurality of the film holding sticking means are provided around the rotation axis of the film holding sticking means.

According to a fourth aspect of the present invention, there is provided a method for attaching a polarizing plate film to a liquid crystal panel, the method comprising: attaching the polarizing plate film to the liquid crystal panel; A panel holding driving step of linearly driving the liquid crystal panel, and suction-holding of the polarizing plate film, and supplying while rotating the polarizing plate film along the peripheral surface of the virtual cylinder in synchronization with the linear driving of the liquid crystal panel. Then, the film holding and sticking step of sticking the polarizing plate film to the liquid crystal panel by sequentially releasing the suction in the vicinity of the region where the adhesive layer of the liquid crystal panel and the polarizing plate film abuts, In synchronization with the operation, the film supply step of supplying the polarizing plate film, in synchronization with the operation of the film holding and sticking step Wherein the release tape having an adhesive layer adhered to said polarizing plate film, and peeling the release film from the polarizing plate film, characterized in that and a peeling step of exposing the adhesive layer.

According to the first aspect of the present invention, the panel holding and driving means holds the liquid crystal panel,
The liquid crystal panel is linearly driven in a predetermined direction along with the operation of attaching the polarizing plate film.

Further, the film supply means supplies the polarizing plate film in synchronization with the rotation of the film holding and sticking means,
The peeling means is synchronized with the rotation of the film holding and sticking means,
A release tape is attached to the polarizing plate film, the release film is peeled from the polarizing plate film, and the adhesive layer is exposed.

As a result, the film holding and sticking means sequentially releases the suction in the vicinity of the area where the adhesive layer of the liquid crystal panel and the polarizing plate film abuts while rotating in synchronization with the linear driving of the panel holding and driving means. Attach a polarizing plate film to the liquid crystal panel.

According to the second aspect of the present invention, in addition to the function of the first aspect, the clean air supply means of the panel holding and driving means is provided with a film holding and sticking means in parallel with the sticking operation of the polarizing plate film. Clean air is blown against the polarizing plate that is held by suction.

According to the third aspect of the present invention, in addition to the function of the first aspect, the plurality of film holding / sticking means sequentially attaches the polarizing plate film to the liquid crystal panel.

According to the fourth aspect of the present invention, in the panel holding driving step, the liquid crystal panel is held and the liquid crystal panel is linearly driven in a predetermined direction along with the operation of attaching the polarizing plate film.

In the film supply step, the polarizing plate film is supplied in synchronization with the operation of the film holding and attaching step.
The peeling step is synchronized with the operation of the film holding and sticking step,
A release tape is attached to the polarizing plate film, the release film is peeled from the polarizing plate film, and the adhesive layer is exposed.

In the film holding and sticking step, the polarizing plate film is suction-held and supplied while rotating the polarizing plate film along the peripheral surface of the virtual cylinder in synchronization with the linear driving of the liquid crystal panel. The polarizing plate film is attached to the liquid crystal panel by sequentially releasing the suction in the vicinity of the area where the pressure-sensitive adhesive layer abuts.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific examples of embodiments of the film sticking apparatus for a liquid crystal display element and the method for sticking a film for a liquid crystal display element according to the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of a film sticking device for a liquid crystal display element according to the present invention. This film sticking device 100 is roughly divided into a liquid crystal panel 2 which is sucked and held, and is conveyed to a sticking position. A panel transport unit 10, a sticking unit 20 for adsorbing and holding the polarizing plate film 1 and sticking it to the liquid crystal panel 2, and a release film 1d attached to the sticking unit 20
Along with (FIG. 4), a film supply unit 30 for supplying the polarizing plate film 1 and a release film 1d of the polarizing plate film 1
And a peeling section 40 for peeling off.

In FIG. 1, the panel transport section 10 includes a first slider 11 for driving the table 13 in the left-right direction.
And a second slider 12 for driving the table 13 in the vertical direction, a table 13 for sucking and holding the liquid crystal panel 2, and polarizing the clean air while the table 13 is raised by the second slider 12. A nozzle 14 for spraying the plate film 1 and a block 15 provided at an end of the table 13 and to which the nozzle 14 is fixed are provided.

As shown in FIG. 2, the sticking portion 20 has a suction surface 22a having a predetermined curved shape, and a film support 22 for sucking and holding the polarizing plate film 1;
The rotating shaft 21 rotatably supports the rotating shaft 2, and a pulse drive motor (not shown) for rotating the rotating shaft 21.

Here, the suction surface 22 of the film support 22
By forming a from a material in which a plurality of suction holes are formed, for example, a porous plate, it becomes possible to perform suction holding without distorting or scratching the polarizing plate film 1 due to suction. Further, by switching a suction valve (not shown) and degassing from the suction hole, the polarizing plate film 1 is suctioned, and air is supplied from the suction hole to thereby polarizing film 1.
Is released.

As shown in FIG. 2, the film supply unit 30 holds the polarizing plate film 1 and rotates the rotating shaft 31.
And a push roller 33 provided on the back side of the film stage 32 for pressing the polarizing plate film 1 held on the film stage 32 against the film support 22. ,
A push roller block 34 for supporting the push roller 33 and a push roller cylinder 35 for reciprocating the push roller 33 are provided.

As shown in FIG. 3, the peeling section 40 includes an unwinding roller 42 for unwinding the peeling tape 41 on which the adhesive layer is formed, and a peeling tape 41 after the adhesive layer is adhered to the polarizing plate film 1. Take-up roller 43, intermediate rollers 49, 50, 51, a peeling roller 44, and a swing arm 45 that swings around a rotation axis of the peeling roller 44.
And a peeling roller 46 rotatably supported by the swing arm 45.

A one-way clutch (not shown) is provided on the shaft of the unwind roller 42 to prevent reverse rotation. As a drive source of the winding roller 43, a motor (not shown) capable of controlling the torque is provided.

The swing arm 45 is urged in the direction of arrow AJ by a spring (not shown), and tension is always applied to the peeling tape 41 from the direction of arrow AH to the direction of arrow AI by a motor (not shown) provided on the take-up roller 43. Have been added.

When the peeling tape 41 is not peeled from the polarizing plate film 1, the motor of the take-up roller 43 is controlled so that the peeling tape 41 rotates with a light tension that does not travel. Also, when peeling the release film 1d,
The motor of the take-up roller 43 is controlled so as to rotate in accordance with the outer peripheral speed of the film support 22.

Next, the operation of the film sticking apparatus for a liquid crystal display device having the above-described configuration will be described.

As shown in FIG. 4, the polarizing plate film 1
A protective sheet 1a is attached to the front side of the polarizing plate body 1b, and an adhesive layer 1c and a release film 1d are formed on the back side, and the total thickness is about 0.3 mm. Then, as shown in FIG. 5, the release film 1d is peeled off, and the polarizing plate film 1 with the adhesive layer 1c exposed is attached to the liquid crystal panel 2.

Hereinafter, the operation of attaching the polarizing plate film 1 to the liquid crystal panel 2 will be described.

In FIG. 1, when the lower right end portion 22b of the film support 22 rotates to the supply position A, as shown in FIG. 2, the release film 1d (FIG. 4) of the polarizing plate film 1 is placed on the lower side to adsorb. Holding film stage 32
Are reversed by a cylinder (not shown) that is a driving source of the supply rotation shaft 31, and are urged so as to press the polarizing plate film 1 against the film support 22, and a plurality of the film supports 22 contacted by the polarizing plate film 1. The end face of the polarizing plate film 1 is suction-held by the suction hole 22c.

While rotating the film support 22 in the direction of arrow AB in FIG.
By sucking the other suction holes 22d, the polarizing plate films 1 pressed by the push rollers 33 are sequentially suction-held.

At this time, the film stage 32 releases the attracted state according to the operation of the film support 22 to prevent the supply position of the polarizing plate film 1 from the film support 22 from shifting.

Next, the lower right end portion 22 of the film support 22
When b rotates to the peeling position B in FIG. 1, the peeling roller 44 of the peeling section 40 is
8, the adhesive surface of the peeling tape 41 wound around the peeling rollers 46 and 44 is released from the polarizing plate film 1 as shown in FIG. Touches film 1d. Here, the peeling roller 46 is constantly urged toward the film support 22 by the elastic force of a spring (not shown). Then, when the adhesive surface of the release tape 41 comes into contact with the release film 1d, the release roller 46 is returned in the AJ direction.

After the peeling roller 46 is returned in the direction of arrow AJ, the film support 22 is rotated in the direction of arrow AB in FIG. 7, and the motor (not shown) of the take-up roller 43 (FIG. 3) is driven to rotate the film. The release film 1d of the plate film 1 is gradually peeled from the end.

At this time, by swinging the peeling roller 46 for peeling the release film 1d by the swing arm 45, it is possible to cope with the fluctuation of the outer periphery of the film support 22, and the adhesive layer of the peeling tape 41 is used as the polarizing plate film. 1 can be brought into close contact with the release film 1d.

When the film support 22 is rotated to the application position C in FIG. 1 or the position shown in FIG. 8, the liquid crystal panel 2 sucked at a predetermined position on the table 13 is moved to the application position just below the film support 22. Up to the first slider 11
And moved upward by the second slider 12.

Here, as shown in FIG. 9, the end 1e of the polarizing plate film 1 of the film support 22 and the liquid crystal panel 2
The moving amount of the first slider 11 of the panel transport unit 10 is set so that the end portions 2a of the panel conveying unit 10 coincide with each other. With the liquid crystal panel 2 and the polarizing plate film 1 in contact with each other, the first slider 11
Is moved in the direction of arrow AL in FIG.
The rotating shaft 21 is driven so that 2 rotates in the direction of the arrow AB, synchronous operation is performed, and the polarizing plate film 1 is sequentially attached to the liquid crystal panel 2.

When the polarizing plate film 1 comes into contact with the liquid crystal panel 2, a suction release blow is blown out from a suction hole of the film support 22 by a suction valve (not shown) to release the suction state of the polarizing plate film 1. .

On the other hand, as shown in FIG. 9, the film support 22 is
Clean air is blown toward the polarizing plate film 1 in the direction of arrow AK. Here, by making the shape of the nozzle 14 into a uniform fan shape, the blowing area can be made linear, and air can be blown uniformly over the entire width direction of the polarizing plate film 1. As the nozzle, for example, a fan-shaped nozzle VE series manufactured by Ikeuchi Co., Ltd. may be used. As a result, the polarizing plate film 1 can be moved to the liquid crystal panel 2 without being restricted by any mechanism.
Can be attached with a small load.

The operation of supplying the polarizing plate film 1 to the film support 22, the operation of attaching the release tape 41,
Each time a series of operations of exposing the adhesive layer 1c and attaching the polarizing plate film 1 to the liquid crystal panel 2 is completed, the panel transport units 10, 20, 30, and 40 involved in each operation are reset to the initial state ( To the initial position) and a new liquid crystal panel 2
And the polarizing plate film 1 is positioned at each supply position.

Hereinafter, in the same manner, the polarizing plate film 1
Is attached to the liquid crystal panel 2.

As described above, according to this embodiment,
The one side of the liquid crystal panel 2 is sucked and held on the table 13, and the polarizing plate film 1 having the adhesive layer 1c exposed at a predetermined position of the film support 22 having the curved sucking surface 22a is sucked and held. Edge 1 of polarizing plate film 1
When e is brought into contact with the end 2a of the liquid crystal panel 2, air is supplied to release suction from the suction holes 22c of the film support 22, and the polarizing plate film is moved with the movement of the liquid crystal panel 2. The adhesive is attached to the first adhesive layer 1c while blowing clean air through the nozzle 14.

Accordingly, the polarizing plate film 1 is not damaged at all, and there is no air bubbles or dust mixed therein.
Can be attached.

The supply operation of the polarizing plate film 1, the attaching operation of the release film 41, the exposing operation of the adhesive layer 1c, and the attaching operation of the polarizing plate film 1 to the liquid crystal panel 2 are continuously performed as a series of operations. Therefore, the speed of the polarizing plate attaching process can be increased.

In the above embodiment, the case where the number of the film supports 22 is one has been described. However, by providing a plurality of the film supports 22 on the same rotating shaft 21, the above-described series of operations can be performed in parallel. You can do
It is possible to further increase the speed.

[0053]

As described above, according to the first aspect of the present invention, the polarizing plate film can be stuck without damaging the liquid crystal panel and without mixing air bubbles or dust. Since the film supply operation, the peeling tape attaching operation, the adhesive material layer exposing operation, and the polarizing plate film attaching operation to the liquid crystal panel are continuously performed as a series of operations, the speed of the polarizing plate film attaching process should be increased. It is possible to provide a film sticking device for a liquid crystal display element capable of performing the above.

According to the second aspect of the present invention, in addition to the above-described effects, there is provided a film sticking apparatus for a liquid crystal display element, which can stick a polarizing plate film more reliably without dust or the like. Can be.

According to the third aspect of the present invention, in addition to the above effects, the polarizing plate film can be sequentially attached to the liquid crystal panel by a plurality of film holding / attaching means, so that the speed can be further increased. A possible film sticking device for a liquid crystal display element can be provided.

According to the fourth aspect of the present invention, the polarizing plate film can be stuck without damaging the liquid crystal panel and without mixing of air bubbles and dust. Since the sticking operation, the exposing operation of the adhesive layer, and the sticking operation of the polarizing plate film to the liquid crystal panel are continuously performed as a series of operations, the liquid crystal display element can speed up the sticking process of the polarizing plate film. A method for attaching a film can be provided.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a film sticking device for a liquid crystal display element according to the present invention.

2 is a detailed configuration diagram of a film supply unit of the film sticking apparatus for a liquid crystal display element of FIG.

FIG. 3 is a detailed configuration diagram of a peeling section of the film sticking apparatus for a liquid crystal display element of FIG. 1;

FIG. 4 is a configuration diagram of a polarizing plate film.

FIG. 5 is an explanatory diagram of a state in which a polarizing plate film is attached to a liquid crystal panel.

6 is an operation explanatory view of a peeling section of the film sticking device for a liquid crystal display element of FIG. 1;

FIG. 7 is an operation explanatory view of a peeling section of the film sticking device for a liquid crystal display element of FIG. 1;

FIG. 8 is an operation explanatory view of a peeling section of the film sticking device for a liquid crystal display element of FIG. 1;

FIG. 9 is an explanatory view of a sticking operation of the film sticking device for a liquid crystal display element of FIG. 1;

10 is an explanatory diagram of a sticking operation of the film sticking device for a liquid crystal display element of FIG. 1;

[Description of Signs] 1 Polarizing plate film 1a Protective sheet 1b Polarizing plate main body 1c Adhesive layer 1d Release film 1e End 2 Liquid crystal panel 2a End 10 Panel transport section 11 First slider 12 Second slider 13 Table 14 Nozzle 15 Block 20 Adhering part 21 Rotating shaft 22 Film support 22a Suction surface 22b Lower right end 22c, 22d Suction hole 30 Film supply unit 31 Rotating shaft 32 Film stage 33 Push roller 34 Push roller block 35 Push roller cylinder 40 Peeling Unit 41 release tape 42 unwind roller 43 take-up roller 44 release roller 45 swing arm 46 release roller 48 separation cylinder 49, 50, 51 intermediate roller 100 film sticking device

Claims (4)

[Claims] 1. A liquid crystal display device film sticking apparatus for sticking a polarizing plate film to a liquid crystal panel, wherein the liquid crystal panel is held and the liquid crystal panel is linearly driven in a predetermined direction with the sticking operation of the polarizing plate film. Panel holding and driving means, and a suction holding surface for sucking and holding the polarizing plate film has a curved surface shape which is located at substantially the same distance with respect to the center of the rotation axis, and the panel holding and driving means performs the linear driving. While rotating in synchronization, the liquid crystal panel and film holding and sticking means for sticking the polarizing plate film to the liquid crystal panel by sequentially releasing the suction in the vicinity of the area where the adhesive layer of the polarizing plate film abuts, Film supply means for supplying the polarizing plate film in synchronization with rotation of the film holding and pasting means; In synchronization with the rotation of the release tape having the adhesive layer was adhered to the polarizing plate film, and peeling the peeling tape from the polarizer film,
A film sticking apparatus for a liquid crystal display element, comprising: a peeling means for exposing the adhesive layer. 2. The panel holding and driving means includes a clean air supply means for blowing clean air onto the polarizing plate sucked and held by the film holding and sticking means in parallel with the sticking operation of the polarizing plate film. The film sticking device for a liquid crystal display element according to claim 1, wherein: 3. The film sticking device for a liquid crystal display element according to claim 1, wherein a plurality of the film holding sticking means are provided around the rotation axis of the film holding sticking means. 4. A method of attaching a polarizing plate film to a liquid crystal panel, wherein the liquid crystal panel is held and the liquid crystal panel is linearly driven in a predetermined direction along with the attaching operation of the polarizing plate film. And a panel holding driving step to hold and hold the polarizing plate film, and supply the polarizing plate film while rotating the polarizing plate film along the peripheral surface of the virtual cylinder in synchronization with the linear driving of the liquid crystal panel. A film holding and sticking step of sticking the polarizing plate film to the liquid crystal panel by sequentially releasing the suction in the vicinity of the area where the adhesive layer of the polarizing plate film is in contact, and in synchronization with the operation of the film holding and sticking step, A film supply step of supplying the polarizing plate film; and the adhesive layer is provided in synchronization with an operation of the film holding and attaching step. The release tape affixed to the polarizing plate film that, by peeling the peeling tape from the polarizer film,
A method for attaching a film for a liquid crystal display element, comprising a peeling step of exposing the adhesive layer.