JPS6256926A - Manufacture of liquid crystal display panel - Google Patents

Abstract

PURPOSE:To prevent impurities from being mixed at the time of charging and to improve the quality of a display panel by injecting liquid crystal into a container, and then cutting an injection end side and sealing the injection port. CONSTITUTION:A bell jar where the container 4 formed by sticking glass substrates 1 and 2 with a seal 3 is put is evacuated and then returned gradually to the atmospheric pressure from the vacuum state while the container injection port 5 is dipped in liquid crystal 6, thereby charging the liquid crystal in the container. Then, injection port end sides 11 and 12 of the container are cut and the injection port is sealed 9. Therefore, liquid crystal 6 sticking on the periphery of the injection port need not be removed, no impurities are mixed at the time of the charging, and the sealing is secured to improve the quality of the panel.

Description

[Detailed Description of the Invention] [Summary] A method for manufacturing a liquid crystal display panel, in which after liquid crystal is injected into a container, the end of the injection port, including a seal and the injection port, is cut off to seal the injection port.

[Industrial application field]

The present invention is applicable to various electronic communication devices and devices.

This invention relates to improvements in the manufacturing method of liquid crystal display panels used to display characters, symbols, etc.

Generally, a liquid crystal display panel is a device in which liquid crystal is sealed in a container made by bonding two glass substrates together.

Therefore, depending on the encapsulation state, the stability of the display and the lifespan are greatly affected, and in particular, there is a strong demand for reliability in encapsulation, as well as care to avoid contamination with impurities.

[Conventional technology]

FIGS. 2a-2c are cross-sectional views showing a conventional method of manufacturing a liquid crystal display panel.

It is obtained by injecting liquid crystal through an injection port 5 into a container 4 made by pasting (1) and (2) together with a seal 3.

To inject the liquid crystal, first evacuate the container 4 in which the liquid crystal is injected together with the Herjar in a Pel jar, etc., and then gradually increase the pressure from the vacuum state to the normal state while keeping the injection port 5 immersed in the liquid crystal 6. It can be done by returning it.

[Problem that the invention seeks to solve]

However, the injection method of the liquid crystal 6 as described above is not suitable for the container 4.
Because the injection port 5 is immersed into the liquid crystal 6 for injection, there is liquid crystal 8 attached around the injection port of the container 4, and when the injection port 5 is sealed 9 while this is there, the liquid crystal 8 after 1. Due to incomplete sealing, there is a concern that moisture entering through the sealing portion may deteriorate the performance of the injected liquid crystal 6.

Therefore, you can completely remove the liquid crystal 8 by wiping the area around the injection port of the container 4 where the attached liquid crystal 8 is with a cloth. If you use a solvent instead of cloth, for example, the attached liquid crystal 8 can be removed, but inside the container 4. There is a problem in that the performance of the liquid crystal 6 is deteriorated due to the solvent being mixed into the liquid crystal 6.

[Means for solving problems]

The problem mentioned above is solved by the liquid crystal display panel manufacturing method of the present invention, which seals the injection port by cutting off the edge of the injection port, including the seal and the injection port, after filling the container with liquid crystal. Ru.

[Effect]

That is, according to the present invention, since the injection port of the container is immersed in liquid crystal, when the liquid crystal, etc. adheres to the area around the injection port of the container after the liquid crystal is injected, the injection port end including the seal of the container and the injection port. Since the edges are cut off and the injection port is sealed, the liquid crystal that adhered around the injection port during liquid crystal injection can be completely removed from the liquid crystal display panel being manufactured, along with the cut injection edges. I can do it.

〔Example〕

The contents of the present invention will be specifically explained below with reference to embodiments shown in the drawings.

FIG. 1 is a sectional view of a method of manufacturing a liquid crystal display panel according to an embodiment of the present invention.

The difference between FIG. 1 and FIG. 2 is that the injection port 5 is sealed 9 after cutting out the injection port edges 11 and 12, including the seal 3 of the container 4 and the injection port 5. be.

In FIG. 1, a liquid crystal display panel is obtained by injecting liquid crystal 6 through an injection port 5 into a container 4 made by bonding glass substrates 1.2 together with a seal 3.

Injecting the liquid crystal 6 is performed by evacuating the container 4 in which the liquid crystal is to be injected, including the Pel jar, in a Pel jar, etc., and then opening the injection port 5.
The liquid crystal 8 is immersed in the liquid crystal 6 and the pressure is gradually returned from a vacuum state to a normal state.
and the injection port 5 of the container 4.
is removed and the injection port 5 is sealed 9, so the injection IZI
There is no longer any need to remove the liquid crystal 8 that has adhered to the area around 5.
Therefore, the seal 11=9 of the injection port 5 is perfected, and the quality of the liquid crystal display panel is also improved.

〔Effect of the invention〕

As explained in detail below, according to the present invention, when liquid crystal is injected into a container, the liquid crystal that adheres to the area around the injection port can be removed by cutting off the edge of the injection port after the liquid crystal is poured into the container. Since the injection port is sealed, the quality of the liquid crystal display panel can be improved.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention. Cross-sectional diagram of LCD panel manufacturing method, Figure 2 shows the conventional example. FIG. 3 is a cross-sectional view of a method for manufacturing a liquid crystal display panel. In the figure, 1.2 is a glass substrate, ;3 is a seal; 4 is a container, 5 Han” ball entrance, 6 is liquid crystal, 7 is a liquid crystal storage tank; 8 is the attached liquid crystal, 9 is sealed; 11 and 1.2 indicate the injection port end cutting line. Figure 1 22nd

Claims (1)

[Claims] After injecting the liquid crystal (6) into the container (4), the injection port end (1) including the seal (3) and the injection port (5)
1) A method for manufacturing a liquid crystal display panel, which comprises cutting out (12) and sealing the injection port (5).