JPS61174514A - Liquid-crystal display element - Google Patents

Abstract

PURPOSE:To prevent a seal material from being broken away in cutting and to improve quality by forming an adhesive layer which reinforces the adhesion of two large-sized film substrates of a liquid-crystal display element manufactured by multi-working between the seal material and an element end surface. CONSTITUTION:When a multi-worked substrate 2 is formed, many electrodes are formed on surfaces of the two large-sized film substrates, which are stucked together across seal materials and adhesive layers 5, 6, and 7 for reinforcement to form many elements at the same time. Those adhesive layers 5, 6, and 6 for reinforcement are formed between the seal material 1 and the end surface of an element. A cut part 4 is provided previously to a film substrate of the multi-worked substrate 2 at the side where no end part if formed at a part corresponding to the end part. The stress due to the deformation of the film substrate when the substrate if cut along a cutting line 3 is reinforced by the adhesive layers 5, 6, and 7 for reinforcement to prevent the seal material 1 from being broken away. Specially, the adhesive layers 5 and 7 perpendicular to the terminal side are effective. Thus, a leak defect in a seal part is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a plastic liquid crystal display element using plastic as an electrode substrate, and particularly to the shape of a seal portion.

[Background of the invention]

Conventional plastic liquid crystal display elements are manufactured by multi-processing fζ. That is, a large number of electrodes are placed on each of two large film substrates, and they are bonded together via a sealant to form a large number of devices at the same time, and then each is separated to form individual devices. After filling the liquid crystal material and sealing the filling hole, a polarizing plate and a reflecting plate are attached.

This manufacturing method is the same as the already known method for liquid crystal display elements using glass as an electrode substrate.

However, if the substrate is a plastic film, it does not have the rigidity of glass, so it is impossible to cut it with a crack using a diamond cutter or the like, and it is necessary to cut only one of the upper and lower film substrates. I can't.

Therefore, in the case of a plastic film, as shown in JP-A No. 58-43429, for example, before bonding the upper and lower film substrates, a portion of the film substrate on which the terminal portion is not formed, which corresponds to the terminal portion, is A cutout portion is provided in advance by punching or the like.

As shown in Figure 1, this structure consists of two large film substrates each having a large number of electrodes attached to it, and a sealing material
It is formed by cutting along a cutting line 3 a multi-processed substrate 2 on which a large number of elements are simultaneously formed by bonding them together via a cutting line 3. On the film substrate of the multi-processed substrate 2 on which the terminal portion is not formed, a cutout portion 4 is provided in advance at a portion corresponding to the terminal portion. The long sealing material 1 must be kept away from the end face of the element in order to minimize the effects of cutting.

The cutting line 3 can be cut by shear cutting, cutting with a blade, cutting with a press, etc., but in any case, the film substrate is deformed during cutting. In particular, since the cutting line 3 perpendicular to the cutout 4, that is, perpendicular to the end face of the terminal part, cuts the upper and lower two film substrates at the same time, the deformation caused by cutting along the cutting line 3 is large.

If the film substrate is deformed, all the stress will be applied to the sealing material 1, and in the worst case, the sealing portion will peel off, causing element leakage.

[Object of the Invention] An object of the present invention is to provide a liquid crystal display element that can absorb strain generated during cutting and prevent leakage defects at the seal portion.

[Summary of the invention]

In order to achieve the above object, the present invention provides a liquid crystal display element obtained by cutting a multi-processed substrate in which two film substrates made of plastic are bonded together with a sealing material interposed therebetween. It is characterized by forming a reinforcing adhesive layer that reinforces the adhesion between the upper and lower film substrates.

[Embodiments 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 members as in FIG. 1 will be described with the same reference numerals. The multi-processed substrate 2 has two large film substrates each with a large number of electrodes attached thereto, and is bonded together via a sealing material 1 and reinforcing adhesive layer 5, 6, 7 to simultaneously support a large number of elements. It forms. The reinforcing adhesive layer 5.6.7 is formed between the sealing material 1 and the end face of the element. Further, on the film substrate of the multi-processed substrate 2 on which the terminal portion is not formed, a cutout portion 4 is provided in advance at a portion corresponding to the terminal portion.

In this way, since the reinforcing adhesive layer 5.6.7 is formed between the sealing material 1 and the element end face to reinforce the adhesion between the upper and lower film substrates, the deformation of the film substrate when cutting along the cutting line 3 is prevented. The stress caused by this is reinforced by the reinforcing adhesive layer 5.6.7, and the stress of the sealing material 1 is prevented from deforming. In particular, since the cutting line 3 cuts the two upper and lower film substrates at the same time, the reinforcing adhesive layer 5.7 in the direction of the cutting line 3, that is, in the direction perpendicular to the terminal side, is most effective.

Only this reinforcing adhesive layer 5.7 may be provided.

It is most preferable in terms of workability that the reinforcing adhesive layer 5.6.7 is made of the same material as the sealing material 1 and that the reinforcing adhesive layer 5.6.7 is formed at the same time as the sealing material 1 is formed by printing.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, peeling of the seal is prevented and quality is improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory front view showing the shape of the seal part in a conventional multi-processed board. The second reason is a front explanatory view showing an example of the shape of the seal part in the multi-processed board according to the present invention. FIG. 3 is an explanatory front view showing the shape of the seal portion of the element obtained from the figure. 1... Sealing material, 2... Multi-processed board, 3
00. Cutting line, 5.6.7... Reinforcing adhesive layer. \ri-1/

Claims (1)

[Claims] In a liquid crystal display element obtained by cutting a multi-processed substrate in which two film substrates made of plastic are bonded together via a sealant, a reinforcing adhesive for reinforcing the adhesion between the upper and lower film substrates between the sealant and the end face of the element. A liquid crystal display element characterized by forming a material layer.