JPH0229627A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To eliminate a cleaning stage and to shorten working time by forming a liquid crystal ingress preventing barrier, which covers areas up to the outside end of a liquid crystal pouring port with no space between them, on a sealant disposed along the side of the liquid crystal pouring port of an electrode substrate. CONSTITUTION:Upper and lower electrode substrates 1 and 2 are composed of high polymer film. In the liquid crystal pouring port 4, the liquid crystal ingress preventing barrier 12 is formed on the sealant 3. Said barrier 12 is disposed along the side of the liquid crystal pouring port 4, and covers the areas Q up to the outside end 11 of the liquid crystal pouring port. By placing such a liquid crystal ingress preventing barrier 12, the liquid crystal 5 never climbs up the sealant 3 due to capillarity, nor enters the upper and lower electrodes 1 and 2. Consequently, cleaning is not needed after pouring the liquid crystal, thereby shortening working time.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a liquid crystal display device comprising a liquid crystal sandwiched between electrode substrates.

Prior Art A conventional liquid crystal display device is shown in FIG. That is, a lower electrode substrate 1 and an upper electrode substrate 2 are placed opposite each other, a sealing member 3 is disposed along the outer periphery between these electrode substrates 1.2, and a liquid crystal is placed inside the sealing member 3. A liquid crystal display device 6 is constructed by injecting liquid crystal 5 through an injection port 4. The method of injecting the liquid crystal 5 in this case will be described below.

First, the liquid crystal display device 6 and the liquid crystal tray 8 containing the liquid crystal 5 are installed inside the vacuum container 7.Next, after the inside of the vacuum container 7 is sufficiently evacuated, the liquid crystal injection port of the liquid crystal display device 6 is 4
is immersed in the liquid crystal 5, and in this state, the inside of the vacuum container 7 is returned to atmospheric pressure, whereby the liquid crystal 5 is injected using the pressure difference between the inside and outside of the liquid crystal display device 6.

Problems to be Solved by the Invention Figure 4 shows how the liquid crystal 5 enters from the liquid crystal injection port 4.
Shown in a) and (b). In this way, the liquid crystal 5 penetrates upward through the inside surrounded by the seal member 3. However, at this time, the seal member 3 (further reinforced) is inserted between the upper and lower electrode substrates 1 and 2. Since there is a gap g commensurate with the thickness of the sealing member 3 (a gap material 9 is sometimes provided for this reason), there is a gap between the outer surface 10 of the sealing member 3 and the outer end 11 of the liquid crystal injection port 4. can. As a result, when the liquid crystal is injected, the liquid crystal 5 also enters through the gap due to capillary action, and if left in that state, it will cause deterioration of the electrode connection portion (not shown). Therefore, in order to remove the excess liquid crystal 5 that has entered the gap, it is necessary to perform cleaning after the injection process is completed, but such cleaning not only leads to an increase in the number of processes, but also causes the liquid crystal display bag to This will also affect the reliability of W6 itself.

In addition, as other liquid crystal display devices, Japanese Patent Application Laid-Open No. 62-2
There is a device disclosed in Japanese Patent No. 03129, but since the upper and lower electrode substrates (not shown) are made of glass material, it takes time and effort to cut and seal the liquid crystal injection port in the sealing process after the liquid crystal injection process is completed. There is a problem in that it requires

Means for Solving the Problems Therefore, in order to solve these problems, the present invention eliminates the electrode substrate from a polymer film.

A liquid crystal intrusion prevention barrier was formed on the sealing member disposed along the side surface of the liquid crystal injection port of the electrode substrate, covering the area up to the outer edge of the liquid crystal injection port without any gaps.

Effect: Therefore, by forming a barrier to prevent liquid crystal intrusion at the liquid crystal injection port, it is possible to eliminate the gap that is conventionally formed between the outer surface of the sealing member and the outer edge of the liquid crystal injection port. This eliminates the possibility of liquid crystals entering the system due to capillary action, which eliminates the cleaning process, eliminates wasteful consumption of liquid crystals, and eliminates contamination of the equipment itself. It becomes possible to obtain a highly reliable device.

Embodiment An embodiment of the present invention will be explained based on FIGS. 1 and 2. Note that the overall configuration of the liquid crystal display device has been described in the prior art, so a description thereof will be omitted.

Here, the description will focus on the liquid crystal injection port according to the present invention. Further, the same reference numerals are used for the same parts as in the prior art.

The upper and lower electrode substrates 1 and 2 that constitute the liquid crystal display device 6 are made of polymer films.

Furthermore, in the liquid crystal injection port 4, a liquid crystal intrusion prevention barrier 12 is formed on the seal member 3. This liquid crystal intrusion prevention barrier 12 is arranged along the side surface of the liquid crystal injection port 4,
The region Q up to the outer end 11 of the liquid crystal injection port is covered without any gaps.

Therefore, by providing this liquid crystal loss prevention barrier 12, it is possible to prevent the liquid crystal 5 from rising along the sealing member 3 between the upper and lower electrode substrates 1 and 2 due to capillary action, which is different from the conventional method. Thus, there is no need for cleaning after the injection process is completed. As a result, one working time can be shortened, and wasteful consumption of the liquid crystal 5 and contamination of the liquid crystal display device 6 itself can be prevented.

Furthermore, in the step of sealing the liquid crystal injection port 4 with a sealant (not shown) after the liquid crystal injection step, by using a polymer film for the upper and lower electrode substrates 1 and 2, the second
As shown in the figure, cutting along the A-A section can now be performed very easily.

Note that the specifications of the liquid crystal display device 6 that was actually created will be explained.

Number of dots: 128X256 Gap: 8.1±0.1μm Liquid crystal: R4004 Inlet shape: 6.5mmX8.1μm (=wXh
) Substrate Knee-axis stretched PET film Effects of the invention In the present invention, the electrode substrate is not made of a polymer film.

A liquid crystal intrusion prevention barrier is formed on the sealing member disposed along the side of the liquid crystal injection port of the electrode substrate to cover the area up to the outer edge of the liquid crystal injection port without any gaps. The anti-infiltration barrier eliminates the conventional gap between the outer surface of the seal member and the outer edge of the liquid crystal inlet, allowing excess liquid crystal to flow along the outer surface of the seal member into capillary tubes. It no longer seems to rise due to phenomena. Therefore, since a cleaning process is not required, the working time can be further shortened, and unnecessary consumption of liquid crystals and contamination of the device itself can be eliminated, making it possible to obtain an inexpensive and highly reliable device. It is what it is. Furthermore, since a polymer film is used for the electrode substrate, cutting of the liquid crystal injection port during sealing after liquid crystal injection can be easily performed.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the vicinity of the liquid crystal injection port according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing that part further enlarged, and Fig. 3 is an explanatory diagram showing the conventional liquid crystal injection method. Side view,
FIG. 4(a) is an explanatory view showing the vicinity of the liquid crystal injection port, and FIG. 4(b) is a sectional view taken along line BB. 1.2... Electrode substrate, 3... Seal member, 4...
Liquid crystal injection port, 5... Liquid crystal, 6... Liquid crystal display device, 1
1... Outer end, 12... Liquid crystal intrusion prevention barrier, Q.
...Region applicant: Ricohto Co., Ltd.

Claims (1)

[Claims] In a liquid crystal display device in which a liquid crystal is sandwiched between two opposing electrode substrates surrounded by a sealing member disposed along the outer periphery, the electrode substrate is made of a polymer film, and the electrode substrate is made of a polymer film. A liquid crystal display device characterized in that a barrier for preventing liquid crystal intrusion is formed on the sealing member disposed along a side surface of the liquid crystal injection port so as to cover an area up to an outer end of the liquid crystal injection port without any gaps.