JPS61210326A - Plastic liquid crystal display element - Google Patents

Abstract

PURPOSE:To obtain the titled element having a high moisture resistance by covering an end surface of the terminals of an another electrode substrate facing the terminal part, with a resin material. CONSTITUTION:An envelope is formed by bonding a circumference of the upward and the downward electrodes 11, 12 composed of polarizing plates forming each upward and downward electrodes 11a, 12a with a sealing material 13. And then, the liquid crystal material is poured into the envelope from a charging inlet followed by sealing the charging inlet with an adhesives, thereby completing the titled element. The upward and the downward substrates 11, 12 are formed in the shape of imposing the polarizer 14 between the supporting films 15. After completing the liquid crystal display element, an end surface of the terminal side 11b of the downward substrate 12 is coated with the resin material 16 followed by curing. If the titled element is exposed to an atmosphere of a high temp. and a high humidity, the polarizer 14 does not elute from a part of the downward substrate which is covered with the resin material 16, thereby preventing a dissolution of the terminal 11b, and a breaking of a wire.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a plastic liquid crystal display element using a polarizing plate as an electrode substrate.

[Background of the invention]

A general plastic liquid crystal display element using a polarizing plate as an electrode substrate is as shown in Figures 1 and 2.
After the peripheries of upper and lower substrates 1.2 made of polarizing plates on which upper and lower electrodes 1a and 2a are formed are adhered with a sealing material 3 to form an envelope, a liquid crystal substance is injected inside. Furthermore, when forming a large number of liquid crystal display elements on the same large substrate at the same time, for example, Japanese Patent Laid-Open No. 58-43429
However, unlike the case of a glass substrate, the element terminal ζ
It is necessary to make a hole in advance on the other board facing this. Then, each piece is separated using a press, a cutter, or the like.

The upper and lower substrates 1.2 are formed such that the polarizer 4 is sandwiched between support films 5.5 from both sides. in general,
The polarizer 4 is made of polyvinyl alcohol (PVA),
It adsorbs iodine compounds and exhibits its polarizing properties.

By the way, when a plastic liquid crystal display element formed using such a polarizing plate as an electrode substrate is exposed to a high temperature atmosphere or when water droplets adhere to it, P
Since VA is a water-soluble polymer (macromolecule), the components are eluted. Therefore, iodine, which is a component of the polarizer 4, is eluted from the end surface 2b of the other electrode substrate (lower substrate) 2, which is opposite to the terminal lb portion l, and indium oxide (
I''20s), which adheres to the NESA terminal 1b made of tin oxide (Sntos).

Since the indium oxide of the NESA terminal 1b is easily dissolved by acid, when the above-mentioned phenomenon occurs, the terminal 1h will be dissolved, and eventually the NESA wire will be disconnected.

[Purpose of the invention]

An object of the present invention is to provide a plastic liquid crystal display element with excellent moisture resistance.

[Summary of the invention]

According to one embodiment of the present invention, there is provided a plastic liquid crystal display element in which the terminal-side end surface of another electrode substrate facing the terminal portion is covered with a resin material. Thereby, it is possible to prevent iodine from being eluted by water from the end surface of the electrode substrate corresponding to the terminal side, and it is possible to suppress the dissolution phenomenon of the terminal.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. The peripheries of upper and lower substrates 11 and 12 made of polarizing plates on which upper and lower electrodes 11a and 12a are respectively formed are adhered with a sealing material 13 to form an envelope. Next, a liquid crystal material is injected into the interior through a pre-prepared filling hole, and then the filling hole is sealed using an adhesive to complete a liquid crystal display element.

The upper and lower substrates 11 and 12 are formed such that a polarizer 14 is sandwiched between support films 15 from both sides, and the support films 15 are made of a polyethylene terephthalate film produced by stretching in a uniaxial direction (uniaxial direction). .

After completing the liquid crystal display element, a resin material 16 is applied to the end surface of the lower substrate 12 on the terminal 11b side and hardened. Examples of materials that can be used as the resin material 16 include a urethane-modified polyacrylate adhesive that is cured by ultraviolet light, or a material prepared by dissolving an amine-curing epoxy resin in a ketone solvent such as methyl ethyl ketone or acetone at a concentration of about 50%. It is. As the solvent for dissolving the resin material, alcohol-based solvents, halogen-based solvents, etc. can also be used.

In this way, since the end surface of the lower substrate 12 corresponding to the terminal 11b side is covered with the resin material 16, even if exposed to a high temperature and high humidity atmosphere, the portion of the lower substrate 12 covered with the resin material 16 is
The polarizer 14 is not eluted. This prevents the terminal 11b from melting, breaking, etc.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the terminal side end surface of another electrode substrate facing the terminal portion is covered with a resin material, so that a plastic liquid crystal display element with high moisture resistance can be obtained. It will be done.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional example, FIG. 2 is a perspective view of FIG. 1, and FIG. 3 is an enlarged sectional view of a main part showing an embodiment of the present invention. 11... Upper substrate, Ila... Upper electrode,
llb...terminal, 12...lower electrode, 1
2a... Lower electrode, 13... Seal material, 14.
...Polarizer, 15...Support film,
16...Resin material. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In a plastic liquid crystal display element using a polarizing plate formed by sandwiching a polarizer between support films from both sides as an electrode substrate, the terminal side end surface of another electrode substrate facing the terminal portion is covered with a resin material. A plastic liquid crystal display element characterized by a shank.