JPH0362020A - Dry spraying device for liquid crystal gap material - Google Patents

Abstract

PURPOSE:To allow the uniform spraying of a liquid crystal gap material by disposing an electrostatic gun at a prescribed height above a liquid crystal substrate and electrifying the particles of the liquid crystal gap material to be sprayed to negative. CONSTITUTION:A gas supplying port 2 is provided in an automatic supplying device 1 in which the liquid crystal gap material is housed. The electrostatic gun 3 is disposed at the prescribed height above the liquid crystal substrate 4. A controller 6 to electrify the particles 7 of the liquid crystal gap material sprayed from the electrostatic gun 3 to negative is provided. The delivery port 1b of the automatic supplying device 1 and the electrostatic gun 3 are communicated by a pipe 5. Since the particles 7 of the liquid crystal gap material sprayed from a discharge port 3a are electrified to negative, the particles fall by repulsing each other. The liquid crystal gap material is distributed and stuck uniformly on the liquid crystal substrate 4 in this way.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a dry liquid crystal gap for maintaining uniform spacing between liquid crystal substrates (cover glass and patterned glass) used in liquid crystal displays used in electronics. This invention relates to a device for dispersing wood.

(Prior art) Conventionally, this type of liquid crystal gap material application has used a wet method such as applying a liquid mixed with an organic solvent, such as fluorocarbon, using a flow coater or a spray method, and then drying the solvent. A method was used to do so.

(Problems to be Solved by the Invention) Recently, the use of liquid crystal displays as electronic components has rapidly increased, and there has been a demand for larger sizes.

In order to improve the quality of liquid crystal displays, it has become necessary to make the liquid crystal layer uniform and thinner the gap between the cover glass, which is the liquid crystal base, and the patterned glass.

In order to meet such demands for manufacturing liquid crystal displays, the liquid crystal gap material application apparatus of the above-mentioned conventional technology is not suitable for the wet method in which the liquid crystal gap material is kneaded into an organic solvent and then applied.
As shown in FIGS. 5 and 6, several particles of the liquid crystal gap material aggregate or form clumps and are mixed together during the application of the liquid crystal gap material. Such agglomeration or agglomeration of particles is caused by the formation of two or more layers of particles,
As mentioned above, the uniform thickness of the liquid crystal display becomes uneven, making it impossible to obtain a liquid crystal display of stable quality. or,
In the conventional wet method, since an organic solvent is used, the organic solvent is released into the atmosphere during drying, which poses an environmental health problem.

In addition, when Freon is used as an organic solvent, it causes environmental pollution and also causes social problems. Furthermore, the device is also large-sized, requiring high equipment costs and a large installation space, and in addition, there are problems in that the running cost is high and the type of liquid crystal gap material cannot be easily changed.

An object of the present invention is to provide a liquid crystal gap material dispersing device that solves the above problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a gas supply port in an automatic supply device that stores liquid crystal gap material, and arranges an electrostatic gun at a predetermined height above the liquid crystal substrate. The present invention is characterized in that it has a control device that negatively charges the liquid crystal gap material particles sprayed by the electrostatic gun, and that the outlet of the automatic supply device and the electrostatic gun are connected through a pipe.

(Example) Hereinafter, an example shown in Figs. 1 to 4 will be described in detail.The device is an automatic supply device that stores dry liquid crystal gap material (3μφ as an example). The amount of liquid crystal gap material to be used per time varies depending on the area of the liquid crystal substrate, the type and particle size of the liquid crystal gap material, the use of the liquid crystal display, etc. Generally, the amount used per time is 0. 5■/10d to 2.5■/10d are supplied. 2 is a gas supply port, for example, a mixture of dry, clean air or nitrogen gas is blown. 3 is placed at a predetermined height above the liquid crystal board 4. This electrostatic gun is connected to the outlet 1b of the automatic supply device 1 through a pipe 5. 6 is an electrostatic gun 3.
This is a control device that negatively charges the particles 7 of the liquid crystal gap material sprayed from the lower discharge port 3a.

Next, the effect will be explained. The amount of liquid crystal gap material to be used for one time is input into the automatic supply device 1 through the input port 1a, and a controlled amount of gas, such as dry, clean air or nitrogen gas, is supplied through the gas blowing port 2. The liquid crystal gap material is sent to the electrostatic gun 3, and while the liquid crystal gap material particles 7 are negatively charged, they are spread and expanded into the spraying device from the lower discharge port 3a. The charging voltage (■) in the electrostatic gun 3 varies depending on the type of liquid crystal gap material, particle size, weight, area of the liquid crystal substrate (cover glass), distance of spray drop, etc., but it is generally 10 to 100 V, and L can also be controlled automatically.

Particles 7 of the liquid crystal gap material blown with gas and scattered from the discharge port 3a are negatively charged, so the particles electrically repel each other, and descend while discharging, and are deposited on the liquid crystal substrate 4 as shown in FIG.
As shown in FIG. 3, the particles are almost uniformly distributed and deposited in the form of single particles.

Due to the residual charge, individual particles are almost uniformly dispersed and adhered to the liquid crystal substrate.

(Effects) According to the present invention, a gas supply port is provided in the automatic supply device that stores the liquid crystal gap material, and an electrostatic gun is disposed at a predetermined height above the liquid crystal substrate, and the liquid crystal gap material is sprayed from the electrostatic gun. It has a control device that negatively charges the material particles, and the outlet of the automatic supply device and the electrostatic gun are connected through a pipe, so conventional coating methods such as flow coater method and spray method use organic solvents. Compared to the wet method, spraying is a dry method that does not use solvents, so there is no pollution and environmental hygiene is significantly improved.Since there is no exhaust duct and no solvents such as fluorocarbons are used, there is no air pollution.

In addition, since the liquid crystal gap material particles are directly charged and dispersed,
Unlike the conventional method, several particles of the liquid crystal gap material aggregate or form clumps and are uniformly dispersed individually without being mixed during the liquid crystal gap material dispersion. Therefore, in the liquid crystal display manufactured using the device of the present invention, thin, high-quality liquid crystal displays with uniform and even spacing between the cover glass of the liquid crystal base and the patterned glass can be stably produced. became possible. Equipment has also been simplified and made smaller, lowering equipment costs and running costs, requiring a smaller installation area, making it easier to change the type of liquid crystal gap material, and significantly improving work efficiency.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the overall configuration of the device of the present invention, Fig. 2 is a plan view showing the state of dispersion and adhesion of the liquid crystal gap material according to the invention, Fig. 3 is a cross-sectional view taken along the line A-A in Fig. 2, and Fig. 4 is a Figure 5 is a front cross-sectional view of a liquid crystal display manufactured from those in Figures 2 and 3.
The figure is a plan view showing how the liquid crystal cap material is spread and adhered by a conventional device, Figure 6 is a front sectional view taken along line BB in Figure 5, and Figure 7 is a liquid crystal display manufactured from the one shown in Figures 5 and 6. FIG. 3 is a front cross-sectional view of the spray. 1...Automatic supply device for liquid crystal gap material 1a...Input port 2...Gas supply port 3...Electrostatic gun
4...Liquid crystal board 5...Pipe 6...
Control device 7: Particles of liquid crystal gap material

Claims (1)

[Claims] A gas supply port is provided in an automatic supply device that stores the liquid crystal gap material, an electrostatic gun is provided at a predetermined height above the liquid crystal substrate, and the particles of the liquid crystal gap material sprayed by the electrostatic gun are controlled to be negatively charged. A dry-type liquid crystal gap material dispersing device, which has an automatic feeding device and an electrostatic gun connected through a pipe.