KR200156828Y1 - Spacer scattering apparatus for lcd - Google Patents

Abstract

The spacer solution supply tank 12 and the furnace 6 are connected in order to improve the display quality by dispersing the spacers scattered by keeping the gap between the upper and lower substrates of the LCD constant in a small system and to prevent contamination in the tube. A liquid crystal display spacer spreading device is proposed in which a groove 18 capable of accelerating the flow of a spacer solution is formed in a solution supply line 10 to distribute the spacer solution evenly even at a low gas pressure.

Description

Spacer spreading device of liquid crystal display

1 is a block diagram showing a spacer spreading device of a liquid crystal display according to the present invention,

2 is a perspective view showing a spacer supply pipe constituting the spacer spreading device according to the present invention.

* Explanation of symbols for main parts of the drawings

4: LCD substrate 6: row

8 chamber 10 solution supply line

12: spacer solution supply tank 14: pumping means

Industrial use

The present invention relates to a spacer spreading device of a liquid crystal display (hereinafter abbreviated as LCD), and more particularly, to distribute and apply a spacer for maintaining a cell gap of an LCD to have a uniform spread on a surface of a glass substrate. It relates to a spacer spreading device.

Conventional technology

LCD, which is a kind of display on the surface, usually uses two conductive plate materials arranged in parallel and injects a liquid crystal having dielectric anisotropy therebetween, and the light reflecting property of the liquid crystal is changed by a voltage change applied from the outside. It is to display letters, numbers or other arbitrary images.

This type of LCD has the following configuration. That is, an ITO (Induim Tin Oxide) transparent conductive film and an alignment film for limiting the dielectric anisotropy of the liquid crystal are laminated on the inner facing surfaces of the two transparent upper and lower glass substrates arranged in parallel.

A spacer for maintaining a constant cell gap of the liquid crystal cell is embedded between the two glass substrates, and a liquid crystal is injected into the liquid crystal cell formed as described above, and the injection hole of the liquid crystal is sealed by a sealant.

Here, the spacers disposed between the two glass substrates are dispersed and applied through a separate dispersing apparatus, and the dispersing apparatus includes a conveyor for transferring and seating the glass substrate.

In addition, the spacer spreading device pressurizes the spacer solution stored in the storage tank to supply through the supply pipe to distribute the spacer to the glass substrate seated on the conveyor, and through the line laid in the predetermined denture of the supply pipe The spacer solution is dispersed and coated on the glass substrate, and the excess spacer solution is returned through the pump.

The spacer solution stored in the storage tank is pressurized by nitrogen gas (N2) to be injected into the supply pipe, and the nozzle is supplied with nitrogen gas for dispersing the spacer solution and nitrogen gas for keeping the dispersion constant.

Problem that devise tries to put on

The conventional dispersing apparatus having such a configuration requires injection of a spacer solution flowing in the supply pipe as a uniform dispersion and pressure of gas, for example, 7 kg / cm 2. That is, there is a problem in that a device having a large capacity must be provided in order to supply the high pressure nitrogen gas.

On the other hand, the supply pipe is usually made of PP (Poly Propylene), PE (Polyethylene), Teflon, etc., the spacer solution circulating the inside of the supply tube is left in the particles and the spacer particles due to the residue Agglomeration of phenomena occurs.

Accordingly, there is a disadvantage in that the scattering of the spacer and the display quality of the LCD are deteriorated according to the aggregation phenomenon and the fine foreign matter generated by the dispersion apparatus residue of the prior art.

Means to solve the problem

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a spacer spreading device of the LCD that can improve the display quality of the LCD.

In order to realize the above object of the present invention, in the spacer spreading device for injecting a spacer solution of fine particles to the LCD substrate located in the chamber, the flow of the spacer solution in the solution supply pipe connecting the spacer solution supply tank and the row; Provided is a spacer spreading device of an LCD which forms an accelerating groove to uniformly distribute a spacer solution even at a low gas pressure.

The groove provides a spacer spreading device of the LCD, characterized in that formed in a spiral.

Provided is a spacer spreading device of the LCD, characterized in that the pumping means for returning the solution supply line to the spacer solution supply tank when the injection amount of the nose is less than the supply amount is provided.

Action

The spacer spreading apparatus of the present invention, which is constituted as described above, has a high flow rate due to the spiral groove in the pipeline when the spacer solution is supplied from the solution supply tank through the solution supply pipe. Since the pressure can be lowered, the capacity of the pressurized gas means can be reduced, and the flow rate of the spacer solution can be increased, thereby preventing contamination in the conduit.

Example

1 is a view showing the configuration of a spacer dispersing apparatus according to the present invention, the conveyor means for transferring the LCD substrate to the spacer dispersing process, and the spacer to the LCD substrate 4 conveyed through the conveyor means (2) It includes a nozzle (6) provided to disperse.

The furnace 6 is located at the upper end of the chamber 8, which is installed in the solution supply line 10 which is a substantial passage of the solution in order to receive the spacer solution.

The configuration in which the furnace 6 is installed in the solution supply pipe 110 is configured such that the solution flowing through the pipeline can be supplied to the furnace 6, which is the same as those commonly used. Is omitted.

The nozzle 6 communicates with the spacer solution supply tank 12 through the solution supply line 10. The spacer solution supply tank 12 connects the spacer solution to the solution supply line by pressurized gas such as nitrogen gas. It can be made to pressurize by (10).

The excess solution is supplied to the solution supply line 10 when the amount of the solution is larger than the actual injection amount while the spacer solution supplied from the spacer solution supply tank 12 is sprayed through the nozzle 6. In order to return to the tank 12, a pumping means 14 is provided.

The pumping means 14 may be a vane pump or an impeller pump generally used in the art.

The furnace 6 is in communication with another pressurized gas pipe 16 so that a uniform dispersion can be achieved when the spacer solution is sprayed.

FIG. 2 is a cutaway perspective view of the solution supply line 10 schematically shown in FIG. 1, in which a spiral groove 18 is formed on an inner circumferential surface so that a flow rate may be accelerated while causing a swirl when a spacer solution flows. It is becoming.

The helical groove 18 may be implemented in various forms. For example, when the fluid flows, such as a double helical or spiral shape, the spiral groove 18 may be accelerated by applying rotational force to the fluid.

In the drawings, reference numeral 20 denotes a conventional driving unit.

This configuration has the advantage of reducing the capacity of the high pressure gas supply means that allows the spacer solution to be sprayed from the furnace 6 to be uniformly sprayed onto the LCD substrate.

That is, the conventional solution supply pipe can simply supply the spacer solution by the high pressure gas, whereas the solution supply pipe of the present embodiment is rotated by the spiral groove while the spacer solution flowing in the pipeline is transported by the high pressure gas and thus the high pressure gas. It is to provide the mobility to reduce the pressure of.

In the spacer spreading apparatus of the present invention, the fluid flow is rotated by the spiral groove 18 of the pipeline when the spacer solution is pumped along the solution supply pipe 10 by gas pressure from the spacer solution supply tank 12. .

This rotational force increases the inertial force with respect to the flow direction of the fluid, so that the moving speed of the spacer solution flowing in the solution supply line 10 is increased. In this way, the spacer solution is injected at a high pressure when the spacer solution is injected through the furnace 6. You will get the effect.

The spacer solution can thus be sprayed uniformly, which makes it possible to realize the possibility of reducing the storage tank capacity of the pressurized gas intended by the present invention.

In addition, since the spiral groove 18 in the solution supply line 10 rotates the spacer solution, the aggregation of the solution does not occur in the line and the flow rate of the solution is increased, thereby minimizing contamination in the line. Will be.

As described above, the spacer spreading apparatus according to the present invention can lower the pressure of the pressurized gas used for uniformly spreading the spacer by increasing the flow rate of the spacer solution, so that the capacity of the pressurized gas means can be made smaller than before. In addition, the contamination of the spacer solution can be prevented, thereby improving the display quality of the LC D.

Claims (3)

In the spacer spreading device for injecting the spacer solution of the fine particles to the LCD substrate located in the chamber, acceleration of the flow of the spacer solution in the solution supply pipe (10) connecting the spacer solution supply tank 12 and the furnace 6 A spacer dispersing device for a liquid crystal display in which a groove (18) can be formed to uniformly distribute a spacer solution even at a low gas pressure. The apparatus of claim 1, wherein the grooves (18) are formed in a spiral shape. The liquid crystal display of claim 1, wherein the solution supply passage (10) is provided with a pumping means (14) for returning the nozzle (6) to a spacer solution supply tank (12) when the injection amount of the furnace (6) is less than the supply amount. Spacer spreader.