JPH0333831A - Vessel for injecting liquid crystal - Google Patents

Abstract

PURPOSE:To obviate the spilling of a liquid crystal by the defoaming of the liquid crystal when the vacuum degree in a chamber is gradually increased at the time of a liquid crystal injection stage or when the liquid crystal and a liquid crystal injection port come into contact with each other by dividing a cell in which the liquid crystal of the vessel is filled to plural cells. CONSTITUTION:The vessel for liquid crystal injection is constituted to have the plural cells 2 in such a manner that the one cell 2 correspond to one liquid crystal panel 4 at the time of injecting the liquid crystal into the liquid crystal panels subjected to gap control. This vessel is provided with the cell 2 for each one of the liquid crystal panels 4. The other liquid crystal panels are hardly influenced even if the liquid crystal spills by the deforming during the liquid crystal stage from, for example, the 2nd cell 2 from the right or when the liquid crystal 6 and the liquid crystal injection port 5 come into contact with each other. Injection defects are decreased in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a container for liquid crystal injection used in a liquid crystal injection process in a liquid crystal panel manufacturing process.

[Conventional technology]

In the process of injecting liquid crystal into a liquid crystal panel during the liquid crystal panel manufacturing process, an injection container made of Teflon is used to store the liquid crystal to be injected in that process. This conventional liquid crystal injection container is shown in FIG. 3(a). As shown in FIG. 3(a), a conventional liquid crystal injection container is used which has one large tank (2) in the injection container (1).

The injection method using this injection container is shown below in Figure 3(b).
Explain using.

In the figure, the liquid crystal panel (4) is housed in the holder (3) that holds the substrate, and the liquid crystal injection port of the liquid crystal panel is placed above the liquid crystal filled in the liquid crystal injection container (1). is set up. At this time, the tank (2) of the liquid crystal injection container (1) is filled with liquid crystal in a state where it is about to overflow due to surface tension. If this condition is not maintained, air will enter between the liquid crystal injection port and the liquid crystal when trying to bring the liquid crystal injection port and the liquid crystal into close contact during the liquid crystal injection process, and the liquid crystal will not be able to fully fill the liquid crystal panel (4 ) to avoid being sucked into the inside.

Initially, the liquid crystal injection container (1) and the liquid crystal panel (4) are separated. In this state, the inside of the chamber is heated to 5×1O”Tor.
Reduce the pressure to r. The chamber is then leaked back to the atmosphere. At this time, as shown in Fig. 3(b), the liquid crystal injection container (1) is raised so that the liquid crystal injection port (5) of the liquid crystal panel is in contact with the liquid crystal (6) as shown in Fig. 3(c). Since the inside of the liquid crystal panel (4) is in a nearly vacuum state, the liquid crystal filled in the liquid crystal injection container is sucked into the liquid crystal panel, and as a result, the liquid crystal is injected.

[Problems with conventional technology]

When performing the liquid crystal injection process as described above, liquid crystal may spill from the liquid crystal injection container (1). This is because as the degree of vacuum in the chamber is increased, the liquid crystal contained in the liquid crystal injection container begins to defoam. Since the liquid crystal is filled to the limit in the liquid crystal injection container (1) using surface tension, it tends to spill out during this defoaming process.

Also, after leaking the inside of the chamber, remove the liquid crystal injection container (1
) is likely to spill when it rises and comes into contact with the liquid crystal panel (4).

Each liquid crystal panel (4) sucks up the liquid crystal that is filled in the same tank (2), so if some liquid crystal spills, air will get trapped between the liquid crystal inlet (5) and the liquid crystal (6). Therefore, injection defects occur in all liquid crystal panels (4).

〔the purpose〕

The object of the present invention is to reduce the above-mentioned problems of poor injection that occur when using conventional liquid crystal injection containers.

[Structure of the invention]

In the present invention, when injecting liquid crystal into a plurality of arranged liquid crystal panels,
The container used in the method of injecting liquid crystal by bringing the liquid crystal filled in the container into close contact with the liquid crystal injection port provided in the panel, wherein the container has a tank for filling a plurality of liquid crystals. The characteristic liquid crystal injection container enables more reliable injection into the liquid crystal panel during the liquid crystal injection process of the liquid crystal panel manufacturing process. In other words, the tank filled with liquid crystal in the liquid crystal injection container is divided into multiple tanks, and the number of liquid crystal panels to be injected from one tank is minimized in one process. Eliminates spillage of liquid crystal due to defoaming of liquid crystal that occurs when increasing the degree of vacuum, or spillage of liquid crystal when liquid crystal and liquid crystal injection port come into contact, and reduces the number of liquid crystal injection defects in liquid crystal panels that occur in one process. This will lead to an improvement in yield.

In other words, even if liquid crystal were spilled, the liquid crystal panel where the liquid crystal spilled would be defective.
Since it does not affect the liquid crystal injection into other liquid crystal panels, injection failures due to liquid crystal spilling from the liquid crystal injection container are reduced.

The present invention will be explained in detail below using examples.

r Example 11 ITO was sputtered onto cleaned soda glass, and the ITO
Pattern TO. After another wash, UV washing is performed. Apply voloid ξ with an offset printing machine and bake. Using a rubbing machine, rub the liquid crystal molecules so that they are aligned in a certain direction. Thereafter, using a screen printer, the panels are overlapped with glass printed with a sealant, pressed, and the panels are separated. When injecting liquid crystal into a gap-controlled liquid crystal panel, insert the liquid crystal injection container (1) into the liquid crystal panel (as shown in FIG. 1(a)).
4) Multiple tanks (2) correspond to each tank (2).
2). One tank (2) is provided for each liquid crystal panel (4). For example, the second tank (2) from the right can be degassed during the liquid crystal injection process, or the liquid crystal (6) and the liquid crystal injection port ( 5) Even if the liquid crystal overflows when it comes into contact with the other liquid crystal panels, there is almost no effect on other liquid crystal panels.

rExample 2J The same steps as in Example 1 were performed up to the injection step in the fabrication process for a liquid crystal panel. When injecting liquid crystal into a gap-controlled liquid crystal panel, the liquid crystal injection containers are placed in multiple containers so that one tank (2) corresponds to two liquid crystal panels (4), as shown in Figure 2(a). It has a tank (2). One tank (2) is provided for each two liquid crystal panels (4). Even if liquid crystal spills from one tank (2), the injection failure can be contained to two liquid crystal panels.

Moreover, compared to the case where one tank is provided for one liquid crystal panel as in the first embodiment, there is also an advantage that the number of liquid crystal panels that can be injected in one process is increased.

r Example 3J The steps up to the injection step in the liquid crystal panel manufacturing process were carried out in the same manner as in Example 1.2. When injecting liquid crystal into a gap-controlled liquid crystal panel, by using the liquid crystal injection container shown in FIG. 2, it is possible to simultaneously inject liquid crystals with different characteristics. For example, a left chiral liquid crystal is shown in Figure 2(b).
The right chiral liquid crystal of the compensating plate for monochrome mode can be simultaneously filled in the center and left tanks in Figure 2 (b), and the liquid crystal panel can be filled at the same time. It is possible.

〔effect〕

According to the present invention, injection into a liquid crystal panel can be performed more reliably. In other words, the tank filled with liquid crystal in the liquid crystal injection container is divided into multiple tanks, the number of liquid crystal panels injected from one container is minimized in one process, and the vacuum inside the chamber is reduced during the liquid crystal injection process. This eliminates spillage of liquid crystal caused by defoaming of the liquid crystal when increasing the temperature or when the liquid crystal comes into contact with the liquid crystal injection port, and can reduce defects in liquid crystal injection that occur in one process. , which leads to an improvement in yield.

[Brief explanation of drawings]

FIG. 1(a) and FIG. 2(a) are diagrams showing a liquid crystal injection container of the present invention. FIG. 1(b) and FIG. 2(b) are diagrams showing the relationship between the liquid crystal injection container and the liquid crystal panel of the present invention. FIG. 3(a) is a diagram showing a conventional liquid crystal injection container. FIG. 3(b) is a diagram showing a liquid crystal injection process. FIG. 3(c) is a diagram showing the relationship between a conventional liquid crystal injection container and a liquid crystal panel. 1...Liquid crystal injection container 2...tank 3...holder 4...liquid crystal panel 5...liquid crystal injection port 6...liquid crystal 3rd figure

Claims (1)

[Claims] 1. Used in a method of injecting liquid crystal into a plurality of liquid crystal panels arranged by bringing the liquid crystal filled in a container into close contact with a liquid crystal injection port provided in the panel. A container for liquid crystal injection, characterized in that the container has a tank for filling a plurality of liquid crystals. 2. A container for liquid crystal injection according to claim 1, characterized in that the number of tanks for filling liquid crystal is equal to the number of liquid crystal panels into which liquid crystal is to be injected.