JPH0682738A - Film sticking method and device thereof - Google Patents

Abstract

PURPOSE:To uniformly stick a film on a liquid crystal module by the use of a pressing jig having common size with the module. CONSTITUTION:A film material 2 is placed on a decided position of the screen of a liquid crystal module 4, an expansible flexible bag 5 is fixed spacedly over the center part of the film material 2, thereafter, fluid is poured into the expansible flexible bag 5 so as to gradually increase the inner volume of the expansible flexible bag 5 from the center part of the film material 2 in the peripheral direction, and hence uniform pressing force is impressed on the film material extending from the center part to the peripheral part so as to press the film. Hereby, the film material such as uniform deflecting plate film can be uniformly stuck by operation of one time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film sticking method and a film sticking apparatus, and more particularly to a film sticking method and a film sticking apparatus for sticking a polarizing plate film and other film materials uniformly to a liquid crystal display module. .

[0002]

2. Description of the Related Art In recent years, liquid crystal display devices have come to be widely used as means for displaying images and the like. This type of liquid crystal display device is formed by laminating various optical films on a liquid crystal panel sandwiching a liquid crystal layer, and in a manufacturing process thereof, a substrate including a drive circuit element mounted on the liquid crystal panel and a light source are combined to form a shield case. In the so-called liquid crystal module stored in
There is a work of attaching a deflector film and other films (hereinafter referred to as film materials).

FIG. 5 is a schematic diagram for explaining a conventional film sticking method and a device for sticking a deflector film or the like to a liquid crystal module housed in a shield case. 1 is a liquid crystal panel, 2 is a film material, 3 is a shield case, 4 is a liquid crystal module, 5'is a rubber roller, 6'is a pressing jig, 7 is a positioning base, and 8 is a film holder.

In the figure, a liquid crystal module 4 containing a liquid crystal panel 1 and the like in a shield case 3 is fixed to a positioning base 7, and an adhesive agent held by a film holder 8 is applied to a predetermined position on its display surface. After the film material 2 was placed, the pressing jig 6'provided with the rubber roller 9 was rolled to press the film material 2 so that the film material 2 was attached. Figure 6
FIG. 7 is an explanatory view of the film material conveyance by the film holder 8, (a) is a film holder 8, 81 is an adhesive tape, 82 is a positioning hole, and (b) is a film material supply tool 83, Reference numeral 84 is a film tray, and 85 is a positioning pin.

In the figure, a large number of film materials 2 are stacked and carried in a film tray 83 via release paper (not shown). The film tray 84 is fixed to a predetermined position of the film material holder 83, and the positioning hole 82 of the film holder 8 provided with the adhesive tape 81 is positioned in the positioning pin 85.
The uppermost film material 2 thus laminated is moved to a predetermined position by the adhesive tape 81 by being inserted into and integrated.

The film holder 8 to which the film material 2 has been transferred is placed on the liquid crystal module 4 as shown in FIG. Also at this time, the position of the liquid crystal module 4 and the film holder 8 is set to a predetermined position by a positioning means (not shown). When the setting is completed, the rubber roller 9 of the pressing jig 6'is rolled to attach the film.

The above-mentioned film is attached to the liquid crystal module 4
Since it is attached in a completed state, that is, after the liquid crystal panel 1 and other components are fixed by the shield case 3, a step (c dimension) is formed between the shield case 3 of the liquid crystal module and the upper surface of the liquid crystal panel 1. ), The width (a dimension) of the rubber roller 9 must be made smaller than the shield case window frame width (b dimension), and a dedicated jig and tool is prepared for each shield case window frame width (b dimension). Need to be kept.

As a disclosure of the prior art relating to this type of liquid crystal display device, there is, for example, Japanese Patent Laid-Open No. 2-259.
No. 621 can be cited.

[0009]

In the above-mentioned prior art, as described with reference to FIG. 5, since a dedicated pressing jig is required for each liquid crystal module, there is a limit to the improvement of work efficiency. It is difficult to apply a pressing force uniformly over the entire surface of the liquid crystal panel by using the rubber roller, and there is a problem that bubbles remain between the liquid crystal panel and the film to reduce the yield.

The object of the present invention is to solve the above-mentioned problems of the prior art, and to apply a film uniformly over the entire surface of a liquid crystal panel by using a common pressing jig regardless of the size of the liquid crystal module. It is an object of the present invention to provide a film sticking method and a film sticking device capable of manufacturing a high-quality liquid crystal display device in which no bubbles remain.

[0011]

To achieve the above object, the present invention provides a film in which at least a drive circuit board is attached to a liquid crystal panel and a film material is attached to a display surface of a liquid crystal module housed in a shield case. In the pasting method, a film material placing step of placing the film material 2 on a predetermined position of a horizontally fixed display surface of the liquid crystal module 4, and the expansion and contraction of a pressing jig 6 having an elastic flexible bag 5 Of the flexible flexible bag 5 above the central portion of the film material 2 by fixing it with a pressing jig, and the elastic flexible bag 5
Fluid is injected into the film material 2 and the inner volume of the elastic flexible bag 5 is gradually increased in the peripheral direction from the central portion of the film material 2 to apply a uniform pressing force from the central portion of the film material 2 to the peripheral portion. And a pressing step to perform.

Further, according to the present invention, in the film sticking method for sticking a film material on the display surface of a liquid crystal module housed in a shield case, at least a drive circuit board is mounted on the liquid crystal panel, the liquid crystal module 4 fixed horizontally. The film material placing step of placing the film material 2 on a predetermined position of the display surface of the device, and the pressing jig 60 having the elastic flexible bag 50 filled with the fluid are separated above the central portion of the film material 2. And a pressing jig holding step of gradually holding the pressing jig 60 and gradually deforming the elastic flexible bag 50 filled with the fluid from the central portion of the film material 2 to the peripheral direction. And a pressing step of applying a uniform pressing force gradually from the central portion of the film material 2 to the peripheral direction.

Then, as a film sticking apparatus for carrying out the above film sticking method, the present invention is a film for sticking a film material on a display surface of a liquid crystal module in which at least a drive circuit board is attached to a liquid crystal panel and housed in a shield case. In the sticking apparatus, a fixing base 7 for horizontally fixing the liquid crystal module 4, a film holder 8 for mounting the film material 2 at a predetermined position on the display surface of the liquid crystal module 4, and an elastic flexible bag 5 are provided. Then, a pressing jig 6 for fixing the stretchable flexible bag 5 above the central portion of the film material 2 is fixed, and a fluid is injected into the stretchable flexible bag 5 to remove the stretchable flexible bag 5. A fluid injecting means 10 for gradually enlarging the inner volume and gradually adhering the film material in the peripheral direction from the central portion,
11 is provided, and a uniform pressing force is applied from the central portion to the peripheral portion of the film material.

Further, as a film sticking apparatus for carrying out the above film sticking method, the present invention is a film for sticking a film material on a display surface of a liquid crystal module which is mounted on a liquid crystal panel and at least a drive circuit board is housed in a shield case. In the sticking device, a fixing base 7 for horizontally fixing the liquid crystal module 4, a film holder 8 for mounting the film material 2 at a predetermined position on the display surface of the liquid crystal module 4, and a flexible flexible fluid-filled device. A pressing jig 60 having a bag 50 and holding the fluid-filled stretchable flexible bag 50 above the central portion of the film material 2 is provided, and a stretchable flexible bag 50 filled with the fluid. From the central portion of the film material 2, the pressing jig 60 to be held is gradually lowered to be gradually deformed from the central portion of the film material 2 in the peripheral direction. And applying a uniform pressing force over the sides.

The present invention can be applied not only to the sticking of the polarizing plate film to the liquid crystal panel but also to the sticking of other film materials, and the sticking surface is not limited to a flat surface, but can be a curved surface or an uneven surface. Applicable.

[0016]

[Function] By gradually injecting air, water, or other fluid into the elastic flexible bag, or by gradually deforming the elastic flexible bag in which the fluid is applied to the surface of the liquid crystal panel, the elastic flexible bag is gradually deformed. Increasing the inner volume of the elastic flexible bag gradually,
Alternatively, by deforming the film material and gradually adhering the film material in the peripheral direction from the central portion, the film material is attached with a uniform pressure regardless of the size of the liquid crystal panel which is the workpiece.

With this structure, air bubbles do not remain between the liquid crystal panel and the film material, and the film material such as the polarizing film can be adhered to the surface of the work piece such as the liquid crystal panel with a uniform pressure. It enables stable film attachment. Further, by using the stretchable flexible bag, it is possible to attach the film material even on the uneven or curved surface.

[0018]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a schematic process diagram for explaining one embodiment of a film sticking method according to the present invention, in which 1 is a liquid crystal panel, 2 is a film material, 3 is a shield case, 4 is a liquid crystal module, and 5 is an elastic flexible bag. , 6 are pressing jigs.

In the figure, first, the film material 2 is placed on a predetermined position of the display surface of the liquid crystal module 4 fixed horizontally. The film material 2 is placed as shown in FIG.
It is similar to that described in. Next, after the pressing jig 6 having a rubber bag (balloon) as the stretchable flexible bag 5 is separated and fixed above the central portion of the film material 2, air is blown into the stretchable flexible bag 5. Inject (a).

By the injection of the air, the stretchable flexible bag 5 gradually inflates, and first the tip comes into contact with the central portion of the liquid crystal panel 1, and the film material 2 starts to be pressed against the liquid crystal panel 1 (FIG. B). As the amount of air injected increases, the stretchable flexible bag 5 presses closely against the peripheral portion of the film material 2 and fills the area limited by the shield case 3 of the liquid crystal panel 1 (c).

At this time, the stretchable flexible bag 5 overlies the edge of the film material 2 and reaches the end surface of the liquid crystal panel 1 due to its nature, so that the film material 2 is reliably attached. If necessary, the pressing jig 6 may be lowered to apply more pressure. After the above steps are completed, the air in the stretchable flexible bag 5 is evacuated and the pressing jig 6 is pressed.
After removing the film, a liquid crystal module with a film attached is obtained.

As described above, since the film material is gradually pressed from the central portion toward the periphery, air bubbles do not remain between the surface of the liquid crystal panel and the film material, and uniform attachment can be performed. In the above description, the fluid injected into the stretchable flexible bag 5 is air, but other gas, water, or other liquid may be used instead.

FIG. 2 is a schematic process diagram for explaining another embodiment of the film sticking method according to the present invention, in which 1 is a liquid crystal panel, 2 is a film material, 3 is a shield case, 4 is a liquid crystal module, and 50 is an expansion / contraction. Flexible bag, 60 is a pressing jig. In the figure, first, the film material 2 is placed on a predetermined position on the display surface of the liquid crystal module 4 which is horizontally fixed. The placement of the film material 2 is the same as that described in FIG.

Next, the pressing jig 6 having a rubber bag (water bag) as the stretchable flexible bag 50 filled with water is fixed above the central portion of the film material 2 so as to be separated (a). Next, when the stretchable flexible bag 50 filled with water is gradually lowered, first the tip comes into contact with the central portion of the liquid crystal panel 1, and the pressing of the film material 2 against the liquid crystal panel 1 is started (FIG. B).

When the elastic flexible bag 50 is further lowered, the elastic flexible bag 50 is pressed against the upper surface of the film material 2 and is brought into close contact with the peripheral portion of the liquid crystal panel 1.
(C) is filled in the area limited by the shield case 3 of FIG. At this time, the stretchable flexible bag 5 overlies the edge of the film material 2 and reaches the end surface of the liquid crystal panel 1 due to its nature, so that the film material 2 is reliably attached.

If necessary, the pressing jig 6 may be lowered to apply more pressure. After the above steps are completed, the stretchable flexible bag 5 is raised and the pressing jig 6 is pressed.
After removing the film, a liquid crystal module with a film attached is obtained.
In this way, since the film material is gradually pressed from the central portion toward the periphery, air bubbles do not remain between the surface of the liquid crystal panel and the film material, and uniform attachment can be performed.

In the above description, the fluid to be injected into the stretchable flexible bag 5 is water, but other liquid may be used instead. Next, an example of the film sticking apparatus according to the present invention will be described. FIG. 3 shows a film sticking apparatus for carrying out the method described in FIG. 1 of the film sticking method according to the present invention.
1 is a schematic diagram illustrating an embodiment, where 1 is a liquid crystal panel, 2
Is a film material, 3 is a shield case, 4 is a liquid crystal module, 5 is an elastic flexible bag, 6 is a pressing jig, 7 is a liquid crystal module positioning base (fixing base), 8 is a film holder,
Reference numeral 9 is a pressing jig fixture, 10 is an air tube, and 11 is a valve.

In the figure, the liquid crystal module 4 is horizontally fixed on a fixed base 7. The film holder 8 (FIG. 6) holding the film material 2 is placed on the liquid crystal module 4 at a predetermined position on the display surface. Next, the pressing jig 6 having the stretchable flexible bag 5 is arranged above the central portion of the film material 2 so as to be separated therefrom, and fixed by the pressing jig fixture 9.

In this state, the valve 11 is operated to inject air from the air tube 10 into the stretchable flexible bag 5 to gradually expand the inner volume of the stretchable flexible bag 5 so that the center of the film material is expanded. From the part to the periphery gradually. In this way, after the film material 2 is stuck on the liquid crystal panel 1, the valve 11 is operated to release the air from the stretchable flexible bag 5, and the pressing jig fixing tool 9 is released to release the pressing jig 6. Get rid of.

As a result, a liquid crystal module with a film attached can be obtained, and the film material is gradually pressed from the central portion toward the periphery, so that air bubbles do not remain between the surface of the liquid crystal panel and the film material. , Can be applied evenly. In the above, the fluid injected into the stretchable flexible bag 5 is air, but other gas may be used instead.

FIG. 4 is a schematic view for explaining another embodiment of the film sticking apparatus for carrying out the method shown in FIG. 2 of the film sticking method according to the present invention, in which 1 is a liquid crystal panel,
2 is a film material, 3 is a shield case, 4 is a liquid crystal module, 50 is an elastic flexible bag filled with water, 60 is a pressing jig, 7 is a liquid crystal module positioning base (fixing base), 8
Is a film holder.

In the figure, the liquid crystal module 4 is horizontally fixed on a fixed base 7. The film holder 8 (FIG. 6) holding the film material 2 is placed on the liquid crystal module 4 at a predetermined position on the display surface. Next, the pressing jig 6 having the stretchable flexible bag 50 filled with water is arranged above the central portion of the film material 2 with a space.

In this state, the stretchable flexible bag 50 is gradually lowered to gradually deform the stretchable flexible bag 50 in close contact.
In this way, after the film material 2 is attached on the liquid crystal panel 1, the stretchable flexible bag 50 is raised and the pressing jig 60 is removed. As a result, a liquid crystal module with a film attached is obtained, and since the film material is gradually pressed from the central portion toward the periphery, air bubbles do not remain between the surface of the liquid crystal panel and the film material, and a uniform film is obtained. Can be pasted.

In the above description, the fluid injected into the stretchable flexible bag 5 is water, but other fluid may be used instead. Further, a fluid such as water can be configured to be charged / unloaded as described in FIG. It should be noted that the present invention is not limited to the sticking of the polarizing plate film to the liquid crystal panel described above, but may be applied to the sticking of other film materials, and the surface to be stuck is not limited to a flat surface, but may be a curved surface or a surface having irregularities.

[0035]

As described above, by using the film sticking method and apparatus according to the present invention, it is possible to stick a uniform film material such as a polarizing plate film in a single operation. In addition, it can be used as a common bonding jig regardless of the size of the work piece such as a liquid crystal module and the unevenness of the surface to which it is stuck, and the jig development cost that was conventionally produced for each product type can be reduced. It is not necessary to provide a film sticking method and a film sticking device that can significantly improve work efficiency.

[Brief description of drawings]

FIG. 1 is a schematic process diagram illustrating one example of a film sticking method according to the present invention.

FIG. 2 is a schematic process diagram illustrating another embodiment of the film sticking method according to the present invention.

FIG. 3 is a schematic diagram illustrating one example of a film sticking apparatus that executes the method described in FIG. 1 of the film sticking method according to the present invention.

FIG. 4 is a schematic diagram for explaining another embodiment of the film sticking apparatus for executing the method of the film sticking method according to the present invention described in FIG.

FIG. 5 is a schematic diagram illustrating a film sticking method and a device for sticking a deflector film or the like to a liquid crystal module housed in a shield case according to a conventional technique.

6A and 6B are explanatory views of film material conveyance by a film holder, where FIG. 6A is a film holder and FIG. 6B is a film material supply tool.

[Explanation of symbols]

 1 liquid crystal panel 2 film material 3 shield case 4 liquid crystal module 5 elastic flexible bag 6 pressing jig 7 liquid crystal module positioning base 8 film holder 9 pressing jig fixing tool 10 air tube 11 valve 50 expansion and contraction filled with water Flexible bag 60 Pressing jig

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 7, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction content]

[0035]

As described above, by using the film sticking method and the film sticking apparatus according to the present invention, it is possible to stick a uniform film material such as a polarizing plate film in a single operation. In addition, regardless of the size of the work piece such as the liquid crystal module or the unevenness of the sticking surface , it can be used as a common sticking jig, and the jig development cost that was conventionally produced for each product type is unnecessary. Therefore, it is possible to provide a film sticking method and a film sticking device which can significantly improve the work efficiency.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiro Kochio 3681 Hayano, Mobara-shi, Chiba Hitachi Device Engineering Co., Ltd.

Claims (4)

[Claims] 1. A film attaching method for attaching at least a drive circuit board to a liquid crystal panel and attaching a film material to the display surface of a liquid crystal module housed in a shield case, wherein a predetermined display surface of the liquid crystal module is fixed horizontally. A film material placing step of placing the film material on a position, and a pressing jig for fixing the elastic flexible bag of a pressing jig having an elastic flexible bag so as to be spaced apart from above the central portion of the film material. Tool fixing step, by injecting a fluid into the stretchable flexible bag, gradually increasing the inner volume of the stretchable flexible bag from the central portion of the film material in the peripheral direction to the periphery from the central portion of the film material. And a pressing step of applying a uniform pressing force to the portion. 2. A film attaching method for attaching at least a driving circuit board to a liquid crystal panel and attaching a film material to the display surface of a liquid crystal module housed in a shield case, wherein a predetermined display surface of the liquid crystal module fixed horizontally is provided. Film material placing step of placing the film material on a position, and a pressing jig holding step of holding a pressing jig having an elastic flexible bag filled with fluid at a position above the central portion of the film material so as to be spaced apart from each other. Then, the pressing jig is gradually lowered and the stretchable flexible bag filled with the fluid is brought into close contact with the central portion of the film material in the peripheral direction and gradually deformed to gradually become uniform from the central portion of the film material in the peripheral direction. And a pressing step of applying a different pressing force. 3. A film sticking device for sticking a film material on a display surface of a liquid crystal module, wherein at least a drive circuit board is mounted on a liquid crystal panel and housed in a shield case, and a fixing base for horizontally fixing the liquid crystal module, A film holder for mounting a film material at a predetermined position on the display surface of the liquid crystal module, and an elastic flexible bag, and the elastic flexible bag is fixed above the central portion of the film material while being separated therefrom. At least a pressing jig and a fluid injecting means for injecting a fluid into the stretchable flexible bag to gradually expand the inner volume of the stretchable flexible bag to gradually bring the film material into close contact in the peripheral direction from the central portion of the film material. A film sticking device, comprising: a uniform pressing force applied from the central part to the peripheral part of the film material. 4. A film sticking device for sticking a film material to a display surface of a liquid crystal module, wherein at least a drive circuit board is mounted on a liquid crystal panel and housed in a shield case, and a fixing base for horizontally fixing the liquid crystal module, A film holder for mounting a film material at a predetermined position on the display surface of the liquid crystal module, and an elastic flexible bag filled with fluid, and the elastic flexible bag filled with the fluid is placed in the center of the film material. And a pressing jig that holds the elastic flexible bag filled with the fluid are gradually lowered to closely deform from the central portion of the film material in the peripheral direction. As a result, a uniform pressing force is applied from the central portion of the film material to the peripheral portion thereof.