JP2001066607A - Sealing material applying shape in liquid crystal cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a large area of a substrate actually coming into contact with a sealing material without exerting adverse influence on cutting of the substrate by positioning an outer circumferential edge of the sealing material applied on a corner part of one substrate on the more outer side of the substrate than an outer circumferential edge of the sealing material applied on a side part of the substrate. SOLUTION: A sealing material 20 is constituted of straight line parts 21 corresponding to a side parts 2 of a substrate 1 and a corner part 22 connecting the two straight line parts 21 and 21 corresponding to a corner part 3 of the substrate 1 utilizing a screen printing method or the like. An inner circumferential edge 22B of the corner part 22 of the sealing material 20 has a circular arc shape connected to inner circumferential edges 21B of the straight line parts 21. An outer circumferential edge 22A of the corner part 22 of the sealing material 20 consists of a pair of inclined base parts 22C and 22C connected with outer circumferential edges 21A and 21A of the straight line parts 21 and 21 of both sides and extended in a direction parallel to the outer circumferential edges 21A and 21A of the straight line parts 21 and 21 and positioned on mutually extended lines and a pair of tip parts 22D and 22D extended parallel with the edges 21A and 21A of the parts 21 and 21 from the tip of the parts 22C and 22C and positioned at more outer side of the substrate 1 than the edges 21A and 21A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal material applied to one substrate during the manufacture of a liquid crystal cell for forming a liquid crystal display element, and more particularly to a seal material applied at a corner of the substrate. Regarding improvement.

[0002]

2. Description of the Related Art In general, a liquid crystal cell, which is a base of a liquid crystal display device, surrounds an outer periphery between two substrates having transparent electrodes with a sealing material, and fills a sealed space formed between the sealing material and the two substrates. The liquid crystal is sealed, but in order to form this liquid crystal cell, it is necessary to use glass
A seal material made of epoxy resin, silicon resin, or the like is applied to the outer periphery of one of the substrates by screen printing or the like, and another substrate is pressed against the seal material side of this substrate to heat the seal material. Alternatively, the sealing material is cured by irradiating ultraviolet rays to the sealing material to bond the two substrates.

Conventionally, the shape of a sealing material applied to a substrate has been as shown in FIG.

That is, the sealing material 10 is a straight portion 11 at the side portion 2 of the substrate 1, and an arc portion 12 communicating the two straight portions 11, 11 at the corner 3 of the substrate 1. Further, on the outer side of the arc portion 12, a separation portion 13 of a substantially triangular seal material 10 having an outer edge 13A extending from the outer edge 11A of the linear portion 11 is formed. Was.

[0005] When the conventional sealing material 10 having the above-described structure is pressed against another substrate (not shown) to form a sealing material 14, the sealing material 14 is applied to the arc 15 as shown in FIG. In some cases, the triangular protrusions 16 were connected.

[0006]

By the way, if the conventional sealing material 14 has the above-described shape, the sealing material 14 is located inside the outer peripheral edge 4A of the black mask 4 adhered to the substrate 1 for shielding light. As a result, the actual contact area between the substrate 1 and the sealing material 14 is small, and the peel strength of the sealing material 14 may be reduced. The black mask 4 is exposed to the outside because the actual contact area between the substrate 1 and the sealing material 14 is small. However, since the resin component of the black mask 4 is weak to water, the external moisture is 4, the black mask 4 may be decomposed.

In order to overcome such a problem, it is conceivable to apply the sealing material 10 further to the outside of the substrate 1. However, if the sealing material 10 is applied to the vicinity of the outer peripheral edge of the substrate 1, the final Substrate 1
When cutting the substrate 1, the cutting must be performed including the sealing material 14, and there is a possibility that the cutting failure of the substrate 1 may occur.

In view of the foregoing, the present invention provides a sealing material applied shape in a liquid crystal cell which can ensure a large actual contact area between the substrate and the sealing material without adversely affecting the cutting of the substrate. It is an object.

[0009]

In order to achieve the above object, the liquid crystal cell according to the first aspect of the present invention is characterized in that the shape of the sealing material application is characterized by the outer peripheral edge of the sealing material applied to one corner of one substrate. Is located outside the substrate from the outer peripheral edge of the sealing material applied to the side of the substrate. By adopting such a configuration, the arc portion of the sealing material interposed between the two substrates has a smooth arc shape with a small curvature, so that the actual contact area between the substrate and the sealing material is increased. It can be secured.

In the liquid crystal cell according to the second aspect of the present invention, the shape of the sealing material applied is characterized in that the outer peripheral edge of the sealing material applied to the corner is parallel to the outer peripheral edge of the sealing material applied to the side. The point is that it is substantially at a right angle at the tip of the corner. By adopting such a configuration, the arc portion of the sealing material can have a smoother arc shape.

[0011]

FIG. 1 shows an embodiment of a seal material application shape according to the present invention. A seal material 20 according to this embodiment corresponds to a side portion 2 of a substrate 1 by screen printing or the like. It comprises a straight portion 21 and a corner portion 22 corresponding to the corner 3 of the substrate 1 and connecting the two straight portions 21 and 21.

The inner peripheral edge 22B of the corner portion 22 of the sealing material 20 is the inner peripheral edge 21B of the linear portion 21.
And an arc shape communicating with the An outer peripheral edge 22A of the corner portion 22 of the sealing material 20 communicates with outer peripheral edges 21A, 21A of the straight portions 21, 21 on both sides, respectively, and a pair of inclined base portions 22C, 2
2C and a pair of tips extending parallel to the outer edges 21A, 21A of the straight portions 21, 21 on both sides from the tips of the inclined bases 22C, 22C and located outside the substrate 1 from the outer edges 21A, 21A. The parts 22D and 22D are configured. The two end portions 22D, 22D intersect each other at right angles at the end of the corner 3 of the substrate 1.

Each of the inclined base portions 22C may be inclined in a direction at an obtuse angle with the outer peripheral edge 21A of the linear portions 21 and 21. Alternatively, the linear portions 21 and 21 may be inclined.
May be orthogonal to the outer peripheral edge 21A.

The sealing material 20 according to the present embodiment having the above-described structure is pressed against another substrate (not shown) to form a sealing material 2.
Assuming that the seal material 24 is 4, as shown in FIG.
Since the arc portion 25 has a smooth arc shape with a small curvature, a large actual contact area between the substrate 1 and the sealing material 24 can be secured. The outer edge 4A of the black mask 4 is
It is good to form relatively small.

The shape of the seal material applied according to the above-described embodiment can secure a large actual contact area between the substrate 1 and the seal material 24, so that the actual contact area between the substrate 1 and the seal material 24 is made larger than the conventional one. Thus, the peel strength of the sealing material 24 can be increased. Further, since the black mask 4 is not exposed to the outside, there is no possibility that the black mask 4 will be decomposed by external moisture. Further, since the sealing material 20 does not have to be applied to the vicinity of the outer peripheral edge 1A of the substrate 1, the sealing material 24 does not adversely affect the cutting of the substrate 1.

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made as necessary.

[0017]

As described above, according to the present invention, a large actual contact area between the substrate and the sealing material can be secured without adversely affecting the cutting of the substrate.

That is, by positioning the outer peripheral edge of the sealing material applied to the corner of one substrate outside the substrate from the outer peripheral edge of the sealing material applied to the side of the substrate, the distance between the two substrates can be reduced. Since the circular arc portion of the sealing material interposed between them has a smooth circular arc shape with a small curvature, a large actual contact area between the substrate and the sealing material can be secured.

Further, if the outer peripheral edge of the sealing material applied to the corner is made parallel to the outer peripheral edge of the sealing material applied to the side portion and is substantially perpendicular to the tip of the corner,
The arc portion of the sealing material can be formed into a smoother arc shape.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a seal material application shape according to the present invention.

FIG. 2 is a plan view showing a shape of a seal material formed by the seal material application shape of FIG. 1;

FIG. 3 is a plan view showing a conventional seal material application shape.

FIG. 4 is a plan view showing a shape of a seal material formed by the seal material application shape of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Side part of substrate 1 3 Corner part of substrate 1 4 Black mask 10,20 Seal material 11,21 Straight part 12 Arc part 13 Separation part 14,24 Seal material 15,25 Arc part 22 Corner part

Claims (2)

[Claims] 1. A liquid crystal cell having an outer periphery between two substrates surrounded by a sealing material and sealing a liquid crystal inside the sealing material, wherein a sealing material applied to the one substrate is applied to the liquid crystal cell. A seal material in a liquid crystal cell, wherein an outer peripheral edge of a seal material applied to a corner of one substrate is positioned outside the substrate from an outer peripheral edge of the seal material applied to a side portion of the substrate. Application shape. 2. An outer peripheral edge of the seal material applied to the corner portion is parallel to an outer peripheral edge of the seal material applied to the side portion, and is substantially perpendicular to a tip of the corner portion. A seal material application shape in the liquid crystal cell according to claim 1.