JPH1020316A - Production of liquid crystal display element and apparatus there for - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the electrostatic charge quantity of panel bodies at the time of sealing the liquid crystal injection holes of these panel bodies with sealing resins and to prevent the liquid sag after the application of these sealing resins by connecting the panel bodies to ground potential via conducting means. SOLUTION: The end faces of the panel bodies 1 are provided with the liquid crystal injection holes 1a. The sealing resins (UV curing type adhesives, two-pack mixing type adhesives of an epoxy system, etc.) are applied to the liquid injection holes 1a by, for example, a dispenser to seal the liquid injection holes 1a. At this time, elastic sheets 2 consisting of, for example, sponge sheets, are arranged and laminated as buffer materials on both surfaces of the respective panel bodies 1. Further, conductive sheets 3 as the conducting means are held between the adjacent elastic sheets 2. These conductive sheets 3 are connected to the ground potential. The conductive sheets 3 are formed of metallic foil, conductive fibers or conductive rubber, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a liquid crystal display element, and more particularly, to inject liquid crystal into a cell between transparent electrode substrates and then seal a liquid crystal injection hole in a panel body. The present invention relates to a technique for sealing with a resin.

[0002]

2. Description of the Related Art In manufacturing a liquid crystal display device,
First, a transparent substrate made of glass or synthetic resin is prepared, and a transparent electrode is formed on one surface of the transparent electrode with a predetermined pattern to form a transparent electrode substrate. If desired, a spacer having a predetermined particle size is arranged inside the panel, and the spacers are opposingly combined to form a panel body.

[0003] Then, liquid crystal is injected into the panel body from a liquid crystal injection hole formed between the peripheral sealing materials. Usually, the injection operation is performed under vacuum. Therefore, after the liquid crystal is injected, the display surface of the panel main body is slightly convex.

[0004] However, this is not preferred. For example, STN liquid crystal (Super Twisted Nema)
In the case of (tic), for example, the gap control is required on the order of ± 0.1 μm, and if it is out of this range, it causes defects such as color unevenness.

Therefore, as shown in FIG. 3, a plurality of panel bodies 1 into which liquid crystal has been injected are not shown with a cushioning material (for example, a sponge sheet) 2 having a predetermined thickness interposed therebetween. The liquid crystal injection holes 1a formed on the respective end faces are sealed in a state in which the layers are stacked on a base and an appropriate pressure is applied from above the stacked body to control the gap.

[0006]

In order to seal the liquid crystal injection hole 1a, for example, a sealing resin such as an ultraviolet curable adhesive or an epoxy-based two-component mixed adhesive is applied to the liquid crystal injection hole 1a with a dispenser. In the prior art, however, there is a troublesome problem that liquid dripping often occurs from the liquid crystal injection hole 1a after the application and becomes a defective product as it is, and it has to be scraped off.

The inventor of the present invention has tried to change the material of the sealing resin and the working environment in order to prevent the dripping phenomenon of the sealing resin. However, no favorable results have been obtained. Then, the viewpoint was shifted to the panel body side, and various tests were repeated by trial and error. As a result, it was found that the liquid dripping phenomenon involved static electricity.

That is, since both the substrate of the panel body (liquid crystal panel) and the cushioning material (elastic sheet) are made of an electrical insulator, static electricity is generated due to rubbing when laminating them, and this is the cause of liquid dripping. There was found.

Accordingly, an object of the present invention is to prevent the liquid dripping after applying the sealing resin by reducing the charge amount of the panel body when sealing the liquid crystal injection hole of the panel body with the sealing resin. It is in.

[0010]

In order to achieve the above object, the present invention provides a panel body comprising a pair of transparent electrode substrates having transparent electrodes, which are opposed to each other with a sealing material interposed therebetween. After injecting liquid crystal into the cell of the panel main body from the liquid crystal injection hole formed on the end surface of the panel main body, elastic sheets are arranged on both sides of the panel main body, and a predetermined pressure is applied from the outside thereof. In the method for manufacturing a liquid crystal display element in which the liquid crystal injection hole is sealed with a sealing resin, the panel body is connected to a ground potential via a conductive means.

According to the present invention, a pair of transparent electrode substrates each having a transparent electrode are opposed to each other with a sealing material interposed therebetween, and a liquid crystal injection hole of a panel body in which liquid crystal is injected into the cell. When sealing with a sealing resin, an elastic sheet disposed on both sides of the panel body,
An apparatus for manufacturing a liquid crystal display device, comprising: a pressurizing means for applying a predetermined pressure to the panel main body via the elastic sheet; and a conductive means for connecting the panel main body to a ground potential. .

In the above manufacturing method and apparatus, the conductive means may be a conductive sheet attached to the elastic sheet, or the elastic sheet itself may have conductivity as the conductive means. Well, in any case, since the panel body is connected to the ground potential via the conductive means,
The amount of static electricity can be reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, in order to better understand the technical concept of the present invention, referring to FIGS.
The embodiment will be described.

As described above, the panel body 1 includes a pair of transparent electrode substrates on which transparent electrodes are formed, the transparent electrodes being opposed to each other, a sealing material being interposed therebetween, and a transparent member being interposed therebetween. It is obtained by arranging and combining spacers having a predetermined particle size as desired. A liquid crystal injection hole 1a lacking a sealing material is provided on an end face of the panel body 1, and liquid crystal is injected into the cell from the liquid crystal injection hole 1a under vacuum.

Thereafter, a sealing resin (for example, an ultraviolet-curable adhesive or an epoxy-based two-component adhesive) is applied to the liquid crystal injection hole 1a with a dispenser, for example, to seal the liquid crystal injection hole 1a. At this time, an elastic sheet 2 made of, for example, a sponge sheet as a cushioning material is arranged and laminated on both sides of each panel body 1. In this embodiment, as shown in FIG. The conductive sheet 3 as a conductive means is interposed therebetween, and the conductive sheet 3 is connected to the ground potential, so that the charge amount of the panel main body 1 is reduced.

The conductive sheet 3 is formed of a metal foil, conductive fiber, conductive rubber, or the like, and is dropped to a ground (earth) potential through, for example, a lead wire (not shown).
In this embodiment, the unit in which the elastic sheets 2 are arranged on both sides of the panel body 1 is defined as one unit, and the conductive sheet 3 is sandwiched between the units. However, for example, the following arrangement may be adopted.

A conductive sheet 3 is disposed between the elastic sheet 2 and the panel body 1. In this case, for example, the stacking order of the elastic sheet 2 → the conductive sheet 3 → the panel body 1 → the elastic sheet → the conductive sheet 3 → the next panel body 1... According to this, the conductive sheet 3 is connected to the panel body 1.
And the number of the elastic sheets 2 can be reduced by the number of the panel main bodies 1 as compared with the above embodiment.

The present invention does not necessarily require the use of the conductive sheet 3. That is, by providing the elastic sheet 2 itself as the cushioning material with conductivity and connecting it to the ground potential, the charge amount of the panel body 1 can be reduced similarly to the above embodiment. A typical example is that the elastic sheet 2 is made of conductive rubber.

Next, an example of the present invention configured as the apparatus of FIG. 2 will be described. The device 10 comprises, for example, a preferably conductive base 11 on which the panel body 1 of FIG.
A pair of left and right conductive guide posts 12, 12 erected on both sides of the base 11, and the guide posts 12, 12;
, A pressure plate 13 that preferably applies a predetermined pressure P to the laminate of FIG. 1 from above, the elastic sheet 2 interposed between the panel bodies 1, and the panel body 1 A conductive sheet 3 connected to the ground potential. Although not shown, pressing means such as an air cylinder is connected to the pressing plate 13.

In this case, the elastic sheet 2 is disposed on both sides of the panel body 1 and the conductive sheet 3 is interposed between the elastic sheets 2. The conductive sheet 3 is a chassis member (electrical member) of the apparatus. (Typically, a ground potential).

Therefore, according to this apparatus, as shown in FIG. 1, the elastic sheets 2 are arranged on both sides of the panel body 1, and when the conductive sheets 3 are interposed between the elastic sheets 2, The sheet 3 is the guide column 1 at the ground potential.
2, the electric charge charged in the panel body 1 is discharged through the elastic sheet 2, the conductive sheet 3, and the guide post 12, and is applied to the liquid crystal injection hole 1a. The dripping of the sealing resin is effectively prevented.

In the embodiment of FIG. 2, the conductive sheet 3 is arranged between the elastic sheets 2 in accordance with FIG. 1, but the conductive sheet 3 is brought into direct contact with the panel body 1 as described above. , A part of which may be connected to the guide column 12. In addition, if the elastic sheet 2 itself is provided with conductivity and the elastic sheet 2 is brought into direct electrical contact with the guide column 12, the conductive sheet 3 can be omitted.

[0023]

As described above, according to the present invention,
A pair of transparent electrode substrates each having a transparent electrode are opposed to each other with a sealing material interposed therebetween, and a predetermined pressure is applied to the panel body in which liquid crystal is injected into the cell. When the liquid crystal injection hole is sealed with a sealing resin, the panel body is connected to the ground potential to reduce the amount of electrostatic charge, so that the liquid drop of the sealing resin can be reliably prevented. it can.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of the present invention as a manufacturing method.

FIG. 2 is an explanatory view showing an example of the present invention as a manufacturing apparatus.

FIG. 3 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel main body (of liquid crystal display element) 1a Liquid crystal injection hole 2 Elastic sheet 3 Conductive sheet 10 Manufacturing apparatus 11 Base 12 Guide support 13 Pressure plate

Claims (6)

[Claims] 1. A panel body comprising a pair of transparent electrode substrates each having a transparent electrode and opposed to each other with a sealing material interposed therebetween, and a liquid crystal injection hole formed on an end face of the panel body. After injecting liquid crystal into the cell of the panel main body, an elastic sheet is arranged on both sides of the panel main body, and the liquid crystal injection hole is sealed with a sealing resin while a predetermined pressure is applied from outside the liquid crystal display. A method for manufacturing a liquid crystal display element, comprising: connecting the panel body to a ground potential via a conductive means. 2. The method according to claim 1, wherein the conductive means is a conductive sheet attached to the elastic sheet. 3. The method according to claim 1, wherein the elastic sheet itself has conductivity as the conductive means. 4. A pair of transparent electrode substrates each having a transparent electrode are opposed to each other with a sealing material interposed therebetween, and a liquid crystal injection hole of a panel body in which liquid crystal is injected into the cell is sealed with a sealing resin. At the time of sealing, in an apparatus for manufacturing a liquid crystal display element comprising an elastic sheet disposed on both sides of the panel main body and a pressurizing means for applying a predetermined pressure to the panel main body via the elastic sheet, An apparatus for manufacturing a liquid crystal display device, comprising a conductive means for connecting the panel body to a ground potential. 5. The conductive sheet is attached to the elastic sheet, and a part of the conductive sheet is a conductive sheet that contacts a chassis member of the pressing means.
3. A manufacturing apparatus for a liquid crystal display element according to claim 1. 6. The elastic sheet according to claim 4, wherein the elastic sheet itself has conductivity as the conductive means, and a part of the elastic sheet can be brought into contact with a chassis member of the pressing means. Equipment for manufacturing liquid crystal display elements.