JPS62109023A - Apparatus for producing liquid crystal display device - Google Patents

Abstract

PURPOSE:To permit the uniform spray of spacer materials on an electrode substrate at an accurately controlled quantity with good reproducibility by maintaining the spacer materials in a splashed state by a high-pressure gas in a front stage chamber and feeding said materials to the inside of a rear stage chamber through a narrow part. CONSTITUTION:The spacer materials 11 of which the amt. to be sprayed is preliminarily measured are disposed in the front stage chamber 12 and the electrode substrate 14 to be stuck with the spacer materials 11 is disposed in the rear stage chamber 15. The high-pressure gas which is controlled in the gaseous pressure and gas supply time through a pressure regulating valve and control device is supplied from a high- pressure gas supplying means 16 into the front stage chamber 12, then the spacer materials 11 soar up in the front stage chamber 12 to attain the splashed state; at the same time, the spacer materials are injected together with the high-pressure gas through the narrow part 13 into the lower rear stage chamber 15. The supply of the high-pressure gas is for a short time (for example, about 1 second) and the spacer materials 11 are splashed instantaneously. The spacer materials 11 injected into the rear stage chamber 15 fall by gravity thereafter and are uniformly sprayed on the substrate 14.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to an apparatus for manufacturing a liquid crystal display device, and in particular to an apparatus for manufacturing a liquid crystal display device. This invention relates to a manufacturing device for uniformly dispersing the liquid.

[Summary of the invention]

The present invention is a manufacturing apparatus for dispersing spacer material onto an electrode substrate when manufacturing a liquid crystal display device. By sending the spacer material into the rear chamber, the spacer material is uniformly spread over the electrode substrate for the liquid crystal display device in the rear chamber.

[Conventional technology]

In general, a liquid crystal display device consists of two glass substrates (so-called electrode substrates) (3) and (2) on which transparent conductive films (1) and (2) shaped according to a display pattern are formed, as shown in FIG.
4), a spacer material (5) for regulating the amount of gap between each electrode substrate (3) and (4), and an electrode substrate (3) and (
4) Adhesive (6) as a sealing member for sealing between
It has a structure in which a liquid crystal (7) is enclosed in a cell formed from (). In a liquid crystal display device having such a structure, its response characteristics etc. depend on the amount of gap between each electrode substrate (3) and (4), and it is necessary to make this amount of gap uniform and sufficiently small. Spacer material (
As for 5), there are sheet bodies such as synthetic resin films and mylar sheets, but currently glass fiber is generally used. Conventionally, this spacer material (5) was used as an electrode substrate (3).
) or (4) methods of dispersing the material on the electrode substrate include (1) dispersing the spacer material in a solvent with a high specific gravity, such as carbon tetrachloride, fluorocarbon, etc., and spraying it on the electrode substrate; (2) dispersing the spacer material on the electrode substrate; There is a method of dispersing spacers by using a liquid similar to (1), setting the electrode substrate on a spinner, and rotating it. These +11 and (2
Both of the above methods involve dispersing a spacer material in a liquid. Furthermore, (3) there is a dry method in which only the spacer material is sprinkled on the electrode substrate. In principle, the above three methods are known, and methods (11 and (21) are particularly commonly used in production.

[Problems to be solved by the invention] Glass fibers currently used as spacer materials have a specific gravity of more than 1, so when trying to disperse them in a solvent, the solvent evaporates immediately after spraying. In terms of properties, the solvent is chlorine-based or fluorine-based, which is not desirable, and it is difficult to control the amount and uniformity of spraying.

As a method for (3) above, a method using a device that flows the spacer material laterally is known as shown in Japanese Patent Application No. 53-142863 (Japanese Unexamined Patent Publication No. 55-69124), but in this case, the uniformity Even if it is good, it is difficult to control quantitatively and there are problems with reproducibility.

In view of the above-mentioned points, the present invention provides an apparatus for manufacturing a liquid crystal display device that uses a dry method to control the amount of spacer material with high precision and uniformly spread it with high reproducibility. It is something.

[Means for solving problems]

The present invention provides a front chamber (12) in which a spacer material (11) is pre-measured and arranged, and one side of the front chamber (12) is connected to the front chamber (12) through a narrow part (13), and an electrode for liquid crystal display is connected to the front chamber (12). Substrate (1
4), and a high-pressure gas supply element tBt (16) for supplying high-pressure gas (for example, inert gas such as N2 gas) to the front-stage chamber (12). The front chamber (12) has an interior shape that is wide at the center and gradually narrows toward the narrow section (13) that communicates with the gas inlet (17) above and the rear chamber (15) below. A mesh (18) and a filter (19) are arranged in the center. Measured spacer material (11)
is placed on the mesh (18). High pressure gas supply means (
A pressure reducing valve (20) for controlling gas pressure and a filter (21) are arranged between the front chamber (16) and the front chamber (12), and a solenoid valve (22), a timer (23), and a relay (24).
, a switch (25), etc., and a control device (26) that can arbitrarily control the amount of high-pressure gas.

[Effect]

A spacer material (11) whose amount is measured in advance is arranged in the first stage chamber (12), and an electrode base 1 (14) to which the spacer material (11) is to be attached is arranged in the second stage chamber (15). . Then, when high-pressure gas whose gas pressure and gas supply time are controlled is supplied from the high-pressure gas supply means (16) to the pre-stage chamber (12) through the pressure reducing valve and the control device, the spacer material (
11) flies up in the front chamber (12) and becomes scattered, and is injected together with the high pressure gas through the narrow part (13) into the rear chamber (15) below. The high-pressure gas is supplied for a short time (for example, about 1 second), and the spacer material (
11) is scattered. Thereafter, the spacer material (11) injected into the rear chamber (15) naturally falls and the electrode group Fi (1
4) Spread evenly on top.

The amount of spacer material (11) to be sprayed on the electrode substrate (14) is determined by the amount of spacer material measured in advance, the gas pressure, and the spraying time (after the spacer material is scattered by high-pressure gas,
) is freely controlled by the amount of time dispersed by natural fall within ).

〔Example〕

Hereinafter, an example of a manufacturing apparatus for a liquid crystal display device according to the present invention will be described with reference to FIGS. 1 and 2.

In FIG. 1, (10) shows the device as a whole;
(14) is an electrode substrate for a liquid crystal display device on which a spacer material (11) made of, for example, glass fiber is uniformly distributed by this device, and a transparent conductive film with a desired display pattern is deposited on the glass substrate. Become.

This device (10) includes a front chamber (12) in which a spacer material (11) is arranged, and a narrow part (12) below the front chamber (12).
3), and a rear chamber (15) in which the electrode substrate (14) is arranged, that is, a so-called dispersion case (15), and a front chamber (12).
A high-pressure gas supply means for supplying high-pressure gas to, for example, a high-purity N2 gas cylinder (16) is provided. The inside of the dispersion case (15) is made of a conductive material such as ferrite in order to prevent fine particles from falling and adhering.

The front chamber (12) has two chamber halves (1
2A) and (12B) are combined from above and below through a backing (27), and especially when indoors, the central part is wide, and the high-pressure gas inlet (17) at the top and the narrow part at the bottom are formed. It is configured to become narrower toward the portion (13). In the center of this pre-stage chamber (12) is a mesh (18) made of metal or plastic and a filter (1
9) is arranged, and a spacer material (
11) is placed therein. The container (28) is arranged directly below the high pressure gas inlet (17) for dispersion. The mesh (18) and filter (19) are made by a certain company when it comes to the pedestal for the container (28), and are used to remove relatively large debris and prevent debris from entering the dispersion case (15).

In addition, a pressure reducing valve (20) for controlling gas pressure and a filter (21) are installed on the gas piping (29) from the gas cylinder (16) to the pre-stage chamber (12) and the high pressure gas inlet (17).
), a solenoid valve (22), a relay (24), and a timer (23) that can arbitrarily control the high-pressure gas determined by the internal volume of the pre-stage chamber (12) and the mesh size of the filter (19). A control device (26) consisting of a switch (25) and the like is arranged. The timer (23) controls the supply time of N2 gas.

Next, the operation of this device (10) will be explained. An electrode substrate (14) is placed at a lower position within the dispersion case (11).

Further, the amount of the spacer material (11) to be sprayed is measured in advance, and the spacer material (11) is stored in the container (28) in the pre-stage chamber (12). In this state, the control device! By turning on switch (25) of (26), timer (23) and solenoid valve (22)
is activated, and when N2 gas flows out from the cylinder (16) and passes through the pressure reducing valve (20), the N2 gas pressure is controlled (
For example, 2 kg/cd), and the N2 gas supply time is controlled by a timer (23) (for example, 1 second). When this high pressure N2 gas whose gas pressure and supply time are controlled is supplied to the pre-stage chamber (12). The pre-measured spacer material (11) is scattered in the pre-stage chamber (12), and is injected into the dispersion case (15) together with N2 gas through the narrow part (13) to be dispersed. Thereafter, this spacer material (11) naturally falls within the dispersion case (15) and is uniformly adhered to the entire surface of the electrode substrate (14).

The amount of dispersion of the spacer material (11) on the electrode substrate (14) is approximately determined by the N2 gas pressure, the dispersion time, and the amount of the spacer material.

In Figure 3, the amount of spacer material measured in advance is used as a parameter, and the N2 gas pressure is 2 kg/an! It is a graph showing the relationship between the number of spacer materials sprinkled over a width of 240 pixels on the electrode substrate and the time for spraying the spacer materials, when the number of spacer materials is constant. The curve (r) is when the amount of spacer material is 0.0024 g, the curve (II) is when the amount of spacer material is 0.0020 g, and the curve Cm> is when the amount of spacer material is 0.0OL5 g.

In addition, Fig. 4 shows the counterfeit spacer material and the 24
It is a graph showing the relationship between the number of spacer materials scattered for 0 picture elements. This is after 1 minute has passed after supplying N2 gas (gas pressure 2 kg/cJ) for 1 second (so-called spraying time is 1 minute) f&
This is the measurement of Further, measurements were performed at multiple locations on the substrate. The Δ mark is the maximum value, the mu mark is the minimum value, and the * mark is the average value. The goal is to have around 60 pieces.

As is clear from FIGS. 3 and 4, according to this apparatus, the spraying conditions can be freely controlled by the amount of spacer material measured in advance, the spraying time, and the gas pressure. The spacer material can be evenly distributed in a desired number per unit area.

〔Effect of the invention〕

According to the apparatus of the present invention, the spacer material can be uniformly spread on the electrode substrate with good reproducibility. The amount of spacer material to be sprayed can be freely controlled by the amount of spacer material measured in advance, the spraying time, and the gas pressure. Furthermore, since the spacers are once dispersed in the front room, there is no influence of air flow, and it is also effective as a dust countermeasure.

In addition, the structure is extremely simple and there are no problems with repair or inspection, and it can be used even if the electrode substrate becomes larger.

Furthermore, the spacer material that was not spread on the electrode substrate can be recovered and recycled, making it highly economical.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an example of a manufacturing apparatus according to the present invention, Fig. 2 is a cross-sectional view of its main parts, Fig. 3 is a graph showing the relationship between the number of spacer materials to be sprayed and the spraying time, and Fig. 4 is a graph showing the relationship between the number of spacer materials to be sprayed and the spraying time. Graph showing the relationship between the number of spacer materials spread and the amount of spacer materials, 5th
The figure is a sectional view showing an example of a liquid crystal display device. (11) is the spacer material, (12) is the front chamber, (13) is the narrow part, (14) is the electrode substrate, (15) is the rear crotch chamber, (1
6) is a high pressure gas supply means. Kigata Tsuji type! 0゛5 Go P's Mt. χ Fuck I Iflfλ's 1 Leopard Come A7' Rough Figure 3-F-Continued-? C City 1 mif (1985 + 2)] θ Day 1° Event 1 Cow Display 1985 Patent Application No. 249647 3, Nedi
Correct: Relationship between ξ and the incident Patent applicant address No. 6-7-35, Kitashinyo, Tokyo Parts Store Name (2
18) Sony Corporation IQ Representative Director Nori Ohga AJ # 4, number of inventions increased by 6, 7 + Ii positive 7, supplementary 11゛0
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Claims (1)

[Claims] (a) A front stage chamber in which a pre-measured spacer material is arranged; (b) A rear stage provided below the front stage chamber through a narrow part and in which a substrate for a liquid crystal display device is arranged. (c) having a high-pressure gas supply means; (d) scattering the spacer material in the front chamber with the high-pressure gas and simultaneously sending the spacer material into the rear chamber through the narrow portion; A manufacturing device for a liquid crystal display device characterized by dispersing the liquid evenly over the surface.