JPS599208Y2 - liquid crystal device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to the structure of a liquid crystal injection part of a liquid crystal device.

In a liquid crystal device, electrodes are usually arranged on a substrate such as glass, and the periphery of the substrate is sealed with an adhesive to maintain a distance of several microns to several hundred microns between the electrodes, and the electrodes are surrounded by both substrates and the sealant around them. It is manufactured by filling the inside with liquid crystal material.

As shown in FIG. 1, the conventional vacuum injection method for filling liquid crystal is to drill a liquid crystal injection port 3 in the glass substrate inside the continuous adhesive band 2 at one corner of the substrate 1, and then pour the liquid crystal material through the hole. The entire space between the electrodes was filled.

According to this conventional example, due to the adsorption phenomenon of the conductive substance in the liquid crystal, the conductive substance in the liquid crystal substance becomes scarce at a distance from the injection port, resulting in poor conductivity and other problems such as non-uniform characteristics. Ta.

Therefore, in the case of a liquid crystal device with a large shape and a short distance between electrodes, two injection ports are provided, as disclosed in, for example, Japanese Patent Application Laid-Open No. 48-53694 or Japanese Utility Model Application No. 47-36158. An injection/suction method has been used in which injection is performed through one injection port and suction is performed through the other injection port, but this method requires an injection device and a suction device, which has the disadvantage of complicating the device.

In view of the above, the present invention was developed with the aim of improving the vacuum injection method described above, and it forms an opening approximately at the center of the long side of the continuous adhesive band provided around the substrate. The structure is such that liquid crystal is filled from the opening.

FIG. 2 shows a front view of an embodiment of the present invention, and FIG. 3 shows a side view thereof.

The back substrate 4 and the front substrate 5, each having an electrode arranged on its inner surface, are fixed via a continuous adhesive band 6 surrounding the periphery of the front substrate 5 so that the distance between the electrodes is a predetermined distance.

The continuous band 6 of the adhesive is cut off by a width of several millimeters at the point where it intersects the left-right symmetry line A to form an opening 7, and the inlet member 8 is inserted into the substrate 4 so as to seal the opening 7.
, 5.

The inlet member 8 is hollowed out of ceramic or the like, and has a through hole 9 bored in its center to communicate with the opening 7.
In addition, the opening 7 is sealed from communicating with the outside.

In the manufacturing process of a liquid crystal device, liquid crystal is filled into the space between the electrodes through the through hole 9 and the opening 7, and after filling is completed, the through hole "J"
L9 is sealed with solder, adhesive, or the like.

FIG. 4 shows another embodiment of the present invention, in which the inlet member 8 is cut with a groove 10, which cooperates with the substrate 4 to form a through hole.

FIG. 5 is a diagram showing another example of the shape of the continuous adhesive band, in which liquid crystal reservoirs are formed at the four corners.

As described above, the present invention has one opening formed approximately at the center of the long side of the continuous adhesive band to serve as a liquid crystal injection port, and the distance to the corner is approximately 1, and the damage caused by the conductive substance adsorption phenomenon is reduced accordingly.

This phenomenon becomes noticeable when a certain distance is exceeded and appears as a problem, so in many cases, the problem is completely eliminated by reducing the distance by half.

Furthermore, defects such as non-uniformity in characteristics, such as non-uniformity in cut-off frequencies, are also improved and the left and right sides are made uniform.

Furthermore, conventionally, it was not easy to drill holes in glass, ceramic, etc. substrates, but the present invention has various effects such as eliminating the need for drilling at all. It has a particularly great practical effect when used in liquid crystal display devices that are driven by voltage and have extremely short distances between electrodes.

Additionally, compared to the injection/suction method, the number of openings in the liquid crystal display device is reduced from two to one, and an inhalation device for the liquid crystal substance filling device is no longer required, making the device extremely simple and reducing costs. .

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional example. FIG. 2 is a front view of the embodiment of the present invention, and FIG. 3 is a side view thereof. FIG. 4 is a side view showing another embodiment of the present invention. FIG. 5 is a diagram showing still another embodiment of the present invention. 4, 5: Substrate, 6: Continuous band of adhesive, 7: Opening, 8:
Inlet member, 9, 10: passage.

Claims (1)

[Scope of utility model registration request] A substantially rectangular continuous band of adhesive for sealing the liquid crystal substance between the substrates has l openings formed at approximately the center of the long sides thereof, and the liquid crystal substance is filled between the substrates through the openings. A liquid crystal device characterized by: