JPS6145225A - Liquid-crystal display element - Google Patents

Abstract

PURPOSE:To shorten an injection time and to improve the strength of an injection port part by providing plural liquid-crystal injection ports, and expanding their opening parts, and providing interval control members which are made of the same materials with a seal material and extend from outside ends to inside ends of the injection ports in the injection ports. CONSTITUTION:Plural liquid-crystal injection ports 4 are provided and their opening parts are expanded; and interval control materials 7 which are made of the same material with the seal material 3 are provided in each injection port 4 while extended from the outside end to the inside end of the injection port 4, which is divided into plural parts. In such as case, the space control materials 7 divide the injection port 4 equally at pitch (q). Width (t) is, for example, >=0.2mm., and less than a quarter of the interval between the seal material 7 and a interval control material 7 or the interval (d) between space control materials 7. Further, length (h) is nearly equal to the length H of the injection port. Consequently, the injection time of liquid crystal is shortened, the strength of the injection port part is increased, and the injection amount of the seal material 6 is stabilized, thereby improving the reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a liquid crystal display device, and more particularly to the structure of an injection port for injecting liquid crystal.

[Background of the invention]

As is well known, a liquid crystal display element is made up of a liquid crystal sealed between two electrode substrates, and by applying a voltage to the electrodes formed on the electrode substrates, the optical properties of the liquid crystal change, thereby producing a desired display. It's about getting a pattern.

As shown in Fig. 1, a conventional liquid crystal display element has two electrode substrates 1.2 on which electrodes are formed, with the electrode surfaces facing each other, with a gap of usually several μm to several tens of μm maintained between them. C is held and fixed by the sealing material 3, and the sealing material 3
The liquid crystal 5 is injected into the interior through an injection port 4 formed in a part of the liquid crystal, and then a sealing material 6 such as an acrylic adhesive is introduced into the injection port 4 to seal it.

By the way, as the size of the liquid crystal display element increases, the physical capacity of the filling part of the liquid crystal 5 also increases.
If the size of the opening is small, the time required to inject the liquid crystal 5 is extended, which becomes a bottleneck in production capacity. Therefore, in a large liquid crystal display element, the opening of the injection port 4 needs to be formed wide.

However, if the injection port 4 is simply widened, the strength of the injection port part will decrease, and due to variations in the gap between the electrode substrates 1.2, variations in the end face shape of the electrode substrates 1.2, etc. Variations occur in the amount of sealing material 6 that penetrates. If the sealing material 6 enters in a large amount, the display area of the liquid crystal display element will be damaged. Moreover, if the amount of the sealing material 6 that enters is small, the sealing will be incomplete and the reliability will decrease.

[Purpose of the invention]

An object of the present invention is to provide a large-sized liquid crystal display element that can stabilize the amount of infiltration and improve the strength of the injection port, and has high reliability.

[Summary of the invention]

In order to achieve the above object, the present invention provides two
The electrode substrates are held and fixed at a predetermined interval using a sealing material, liquid crystal is injected into the interior through an injection port formed in a part of the sealing material, and the injection port is sealed with a sealing material. The liquid crystal display device is characterized in that a spacing control material made of the same material as the sealing material and extending from an outer end to an inner end of the injection port is provided in the injection port.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. Note that the same or equivalent parts as in FIG. 1 are denoted by the same reference numerals, and the explanation thereof will be omitted. A plurality of injection ports 4 (three in the embodiment) are provided for injecting liquid crystal, the openings are widened, and a gap control material 7 made of the same material as the sealing material 3 is placed inside the injection ports 4. It is provided extending from the outer end to the inner end, and the injection port 4 is divided into a plurality of parts (in the embodiment, two space control members 7 are provided, so it is divided into three parts).

Here, the spacing control member 7 is formed with the following dimensions.

The injection holes 4 are equally divided and provided at equal intervals with the pins q. The width t is larger than 0.2 and smaller than the distance between the sealing material 3 and the distance control material 7 or the distance d between the distance control materials 7, that is, 0.2 m (1). The length h is approximately equal to the length H of the injection port 4.

Since the injection port 4 is widened in this manner, the time for injecting liquid crystal can be shortened. Furthermore, since the spacing control material 7 is provided inside the injection port 4, the strength of the injection port 4 is improved. Furthermore, since the injection port 4 is divided into a plurality of parts by the interval control member 7, the amount of the sealing material 6 that enters when the injection port 4 is sealed is stabilized, and reliability is improved.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, two electrode substrates arranged opposite to each other are held and fixed with a sealing material at a predetermined interval, and an injection port formed in a part of the sealing material is provided. In a liquid crystal display element C in which a liquid crystal is injected into the inside of the injection port and the injection port is sealed with a sealing material, the injection port is made of the same material as the sealing material and extends from the outer end of the injection port to the inner end. Since the injection port is divided into a plurality of parts by providing the interval control material, the liquid crystal injection time can be shortened and the injection time can be stabilized. In addition, the strength of the injection port is improved, and the amount of sealing material that enters when sealing the injection port is stabilized, improving reliability.

[Brief explanation of the drawing]

Figure 1 shows a conventional liquid crystal display element, la) is a front view,
(b) is a cross-sectional view, FIG. 2 is a front view showing one embodiment of the liquid crystal display element according to the present invention, and FIG. 3 is an enlarged plan view of the injection port. 1.2... Electrode substrate, 3... Seal material, 4...
... Inlet, 5... Liquid crystal, 6... Sealing material, 7... Spacing control material.

Claims (1)

[Claims] Two electrode substrates arranged opposite to each other are held and fixed with a sealing material at a predetermined interval, liquid crystal is injected into the interior through an injection port formed in a part of the sealing material, and the injection port is closed with the sealing material. In the liquid crystal display element sealed with a liquid crystal display device, the injection port is divided into a plurality of parts by providing a spacing control material made of the same material as the sealing material in the injection port and extending from an outer end to an inner end of the injection port. Characteristic liquid crystal display element.