KR20070117333A - Lc syringe of which the de-bubble function is improved - Google Patents

Abstract

An LC(Liquid Crystal) syringe with improved de-bubble functions is provided to remove the possibility, that remaineing bubbles are re-flowed into an LC injecting pipe during dropping of a rod, by artificially removing the bubbles through vacuum suction force and more effectively and automatically remove the bubbles by applying the vacuum suction force in association with the up and down movement of the rod, thereby reliably discharging the LC. An LC syringe comprises a body(30) and a rod(10). In the body, an LC injecting pipe(32), an LC supply pipe(40) and a vacuum suction pipe(70) are formed. The LC injecting pipe passes through the body up and down. The LC supply pipe is connected with the LC injecting pipe in a lower side of the body so as to supply LC(60) to the LC injecting pipe. The vacuum suction pipe is connected to a vacuum device(80) by being connected with the LC injecting pipe in an upper side of the body. The rod is inserted into the LC injecting pipe in an upper part of the body, and installed so as to move up and down by a motor.

Description

LC syringe of which the de-bubble function is improved}

1 is a view for explaining a conventional liquid crystal syringe;

2A to 2E are views for explaining a process of dropping liquid crystal using the liquid crystal syringe of FIG. 1;

3A and 3B are views for explaining a defoaming process using a liquid crystal syringe according to the present invention.

<Description of reference numbers for the main parts of the drawings>

10: rod 30: body

32: liquid crystal injection pipe 40: liquid crystal supply pipe

50: dropping end 60: liquid crystal

70: vacuum suction pipe 75: suction valve

80: vacuum apparatus 90: control apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal syringe, and more particularly, to a liquid crystal syringe capable of effectively removing bubbles inside a syringe.

Conventionally, a liquid crystal layer is formed by a liquid crystal dipping method or a liquid crystal vacuum injection method. However, in this method, first, after cutting into a unit panel, the liquid crystal injection hole is immersed in the liquid crystal liquid by injecting the liquid crystal injection hole into the liquid crystal liquid, and thus the liquid crystal injection takes a lot of time, resulting in a decrease in productivity. In the case of manufacturing the liquid crystal display device, the liquid crystal is injected by the liquid crystal injection method, and the liquid crystal is not completely injected into the panel, which causes the defect. Third, since the process is complicated and takes a lot of time, many liquid crystal injection equipments are required. There was a disadvantage of being required.

In order to overcome these drawbacks, in recent years, instead of injecting the liquid crystal by the pressure difference between the inside and the outside of the panel, the liquid crystal is dropped and dispensed directly onto the substrate, and the liquid crystal dropped by the bonding pressure of the panel is used. The so-called Liquid Crystal Dropping Method, which forms a liquid crystal layer by uniformly distributing over it, has been used.

Since the liquid crystal dropping method directly drops the liquid crystal onto the substrate for a short time, the liquid crystal layer formation of the large-area liquid crystal display device can proceed very quickly, and only the required amount of liquid crystal is directly dropped onto the substrate. It is possible to minimize the consumption of. Therefore, the manufacturing cost of the liquid crystal display device can be significantly reduced. However, bubbles may remain in the syringe when filling the liquid crystal, which affects the degree of dropping amount during the liquid crystal dropping, thereby causing a problem of defective liquid crystal display elements.

1 is a view for explaining a liquid crystal syringe used in the conventional liquid crystal dropping method. Referring to Figure 1, the liquid crystal syringe is composed of a body 30 and the rod 10, the liquid crystal injection tube 32 is formed in the body 30 to penetrate up and down and the lower end of the liquid crystal injection tube 32 It functions as the dropping stage 50 in which the liquid crystal is dropped. The lower side of the body 30 is provided with a liquid crystal supply pipe 40 in communication with the liquid crystal injection tube 32 to supply liquid crystal to the liquid crystal injection tube 32 from the outside. The rod 10 is inserted into the liquid crystal injection tube 32 from the upper portion of the body 30 is installed to enable vertical movement.

2A to 2E are diagrams for explaining a process of dropping liquid crystal using the liquid crystal syringe of FIG. 1, in particular, to explain a process of removing bubbles in the liquid crystal syringe.

First, as shown in FIG. 2A, the liquid crystal 60 is filled in the liquid crystal injection tube 32 through the liquid crystal supply tube 40. At this time, air bubbles are present in the liquid crystal injection tube 32. These bubbles may be included in the liquid crystal itself supplied in the liquid crystal syringe, or may be introduced in the process of supplying the liquid crystal in the liquid crystal syringe.

In order to remove such bubbles, a degassing process as in FIGS. 2B and 2E is performed. Specifically, first, as shown in FIG. 2B, the rod 10 is lowered and inserted into the liquid crystal injection tube 32. And as shown in Figure 2c to drive the motor quickly to pull the rod 10 up. At this time, the valve of the liquid crystal supply pipe 40 and the dropping end 50 is closed to seal the liquid crystal injection pipe 32. As a result, the upper space of the liquid crystal is decompressed to be in a vacuum state immediately, and thus, bubbles attached to the inner wall of the liquid crystal injection tube 32 and bubbles contained in the liquid crystal 60 at the portion indicated by reference numeral A are separated therefrom.

As shown in FIG. 2D, when the rod 10 is completely removed from the body 30 and waits for 2 to 3 minutes, the separated bubbles are discharged to the outside. After the bubble is removed, the rod 10 is inserted into the liquid crystal injection tube 32 and lowered to perform a liquid crystal discharge test to check whether the liquid crystal discharge is normal. If the liquid crystal discharge is not normal, the defoaming process is repeated.

However, bubbles are collected and remain at the upper end B of the liquid crystal injection tube 32 in FIG. 2D. In the process of FIG. 2E, the bubbles are buried in the rod 10 and flow into the liquid crystal injection tube 32 again. Occurs. In order to prevent this, the rod 10 may be inserted after removing the air bubbles remaining at the upper end B of the liquid crystal injection tube 32 with the wiper after the step 2d, but in this case, the liquid crystal present in the liquid crystal injection tube 32 In addition to the contamination problem of 60), it still does not completely prevent the inflow of air bubbles.

Since the defoaming process of FIGS. 2B to 2E depends on the skill of the operator, the degree of bubble removal varies according to the skill of the operator, which affects the discharge amount of the liquid crystal 60. In extreme cases, this can lead to product failure.

In the related art, since a person manually runs the defoaming process of FIGS. 2B to 2E, a lot of work time is required. Usually, the time required for the degassing process per head as shown in FIG. 1 takes 10 to 20 minutes or more depending on the skill of the operator. Currently, 4 to 6 heads are installed for each equipment, so the defoaming process takes only 1 to 2 hours.

 Accordingly, an object of the present invention is to provide a liquid crystal syringe which can efficiently and reliably remove bubbles inside a syringe.

Liquid crystal syringe according to the present invention for achieving the above technical problem is composed of a body and a rod,

The body includes a liquid crystal injection tube penetrating the body up and down, a liquid crystal supply tube communicating with the liquid crystal injection tube at the lower side of the body to supply liquid crystal to the liquid crystal injection tube, and the liquid crystal at the upper side of the body A vacuum suction tube is formed in communication with the injection tube and connected to the vacuum apparatus.

The rod is inserted into the liquid crystal injection tube from the upper portion of the body is characterized in that it is installed up and down by a motor.

The vacuum suction pipe may be provided with a suction valve which is controlled by the suction control device, in which case the suction control device preferably controls the opening of the suction valve in conjunction with the vertical movement of the rod. For example, when the rod is raised above the communication portion between the vacuum suction tube and the liquid crystal injection tube, the suction valve is opened, and the rod is below the communication portion between the vacuum suction tube and the liquid crystal injection tube. When lowered, it is preferable to control the suction valve so that the suction valve is closed.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. In the drawings, the same reference numerals as in FIG. 1 denote components that perform the same function, and a repetitive description thereof will be omitted. The following examples are only presented to understand the content of the present invention, and those skilled in the art will be capable of many modifications within the technical spirit of the present invention. Therefore, the scope of the present invention should not be construed as limited to these embodiments.

3A and 3B are diagrams for explaining a defoaming process using a liquid crystal syringe according to the present invention, corresponding to FIGS. 2B and 2C, respectively.

In the state in which the rod 10 is inserted into the liquid crystal injection tube 32 and the liquid crystal 60 exists in the liquid crystal injection tube 32 as shown in FIG. ) Up quickly. Of course, in this process, the valve of the liquid crystal supply pipe 40 and the dropping end 50 should be closed. Then, the portion indicated by reference numeral A is instantaneously vacuumed, and bubble peeling occurs at this portion. The bubbles thus peeled off are collected at the portions indicated by the reference B.

In the case of the present invention, unlike the prior art, a vacuum suction tube 70 is installed on the upper side of the body 30 to communicate with the liquid crystal injection tube 32. The vacuum suction tube 70 is connected to the vacuum device (80). As shown in FIG. 3B, when the vacuum device 80 operates when the rod 10 rises above the communication portion between the liquid crystal injection tube 32 and the vacuum suction tube 70, the rod 10 is moved from the liquid crystal injection tube 32. Even if not completely removed, bubbles present in the upper end (B) of the liquid crystal injection tube 32 is discharged to the outside through the vacuum suction tube (70).

Therefore, unlike the prior art, bubbles are always forced out through the vacuum pressure in the state in which the rod 10 is raised, and since the rod 10 does not need to be completely removed from the liquid crystal injection tube 32, a rapid and consistent defoaming process is performed. . After the defoaming process is completed, the rod 10 is lowered to perform the discharge test. Since the air bubbles are artificially discharged by the vacuum suction input at the time when the rod 10 stays on the upper end of the liquid crystal injection tube 32, the residual bubbles are not included in the liquid crystal 60 even when the rod 10 is lowered again. .

A suction valve 75 under the control of the suction control device 90 is installed between the vacuum suction pipe 70 and the vacuum device 80 for efficient defoaming, and the suction control device 90 moves up and down the rod 10. In conjunction with, that is, in conjunction with the operation of the motor to control the opening of the suction valve (75).

In the case of the present invention, since the bubble removal collected on the upper portion of the liquid crystal injection tube 32 after the bubble peeling can be removed through the vacuum suction input and the time control, the suction force of the vacuum suction tube 70 and the upper end of the liquid crystal injection tube 32 are removed. In consideration of the rising wait time of the rod 10 and the like, by controlling the opening of the intake valve 75 with the control device 90, bubble removal can be automated. This ensures reliable liquid crystal discharging even if anyone has a liquid crystal syringe.

As described above, according to the present invention, since bubbles are artificially removed by the vacuum suction input, there is no fear that residual bubbles may flow back into the liquid crystal injection tube 32 when the rod 10 descends, and the vacuum suction input may be performed by the rod 10. In conjunction with the up and down movement of the), it is possible to automate bubble removal more efficiently, resulting in reliable liquid crystal discharge.

Claims (3)

Consists of body and rod, The body includes a liquid crystal injection tube penetrating the body up and down, a liquid crystal supply tube communicating with the liquid crystal injection tube at the lower side of the body to supply liquid crystal to the liquid crystal injection tube, and the liquid crystal at the upper side of the body A vacuum suction tube is formed in communication with the injection tube and connected to the vacuum apparatus. The rod is inserted into the liquid crystal injection tube from the upper portion of the liquid crystal syringe, characterized in that installed up and down by a motor. According to claim 1, wherein the vacuum suction pipe is provided with a suction valve which is controlled through a suction control device, the suction control device in conjunction with the vertical movement of the rod to control the opening of the suction valve, characterized in that Liquid crystal syringe. The suction valve of claim 2, wherein the suction valve is opened when the rod rises above the communication portion between the vacuum suction tube and the liquid crystal injection tube, and the rod communicates with the vacuum suction tube and the liquid crystal injection tube. And the suction valve is controlled to close the suction valve when the pressure is lowered below the portion.

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