JPH055891A - Liquid crystal display element - Google Patents

Abstract

PURPOSE:To provide the liquid crystal display element which is improved in the strength in the outer peripheral part of glass substrates and has a high yield of non-defective articles. CONSTITUTION:A seal pattern 3 is printed and formed on the transparent electrode forming surface of either one glass substrate of the upper glass substrate 1 and lower glass substrate 2 having transparent electrodes. Adhesive patterns 7 are printed and formed by using a sealing material constituting the seal pattern on at least four corner parts on the side outer than the seal pattern forming part of this glass substrate. The upper glass substrate 1 and the lower glass substrate 2 are stuck to each other by disposing the seal pattern 3 and the adhesive patterns 7 on the inner side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a bonding structure of an upper glass substrate and a lower glass substrate.

[0002]

2. Description of the Related Art Conventionally, the following methods have been generally used for manufacturing a liquid crystal display device. That is, a glass plate having a plurality of sets of upper transparent electrodes printed on one surface and a glass plate having a plurality of sets of lower transparent electrodes printed on one surface are produced. Next, using a sealant mixed with a glass spacer having a diameter corresponding to the cell gap on the transparent electrode formation surface of one of the glass plates, a seal that individually surrounds each of a plurality of sets of transparent electrodes. A pattern is printed and formed, and at the same time, resin spacers are evenly scattered on the transparent electrode formation surface of the other glass plate. After that, one of these glass plates and the other glass plate are attached to each other with the transparent electrodes inside, and after the sealing agent is cured,
A large number of empty cell containers are obtained by cutting the intermediate portion of the adjacent seal patterns.

According to this method, as shown in FIGS. 3 and 4, the upper glass substrate 1 and the lower glass substrate 2 are bonded to each other via the seal pattern 3, and the portion 4 outside the seal pattern 3 is a non-bonded portion. An empty cell container is formed. Reference numeral 5 in the drawing indicates a liquid crystal inlet, and reference numeral 6 indicates a barrier for preventing the sealant from adversely affecting the liquid crystal. In the liquid crystal display element, liquid crystal is injected through the liquid crystal injection port 6 into the empty cell manufactured as described above, and then the liquid crystal injection port 5 is sealed with a sealant. It is manufactured by attaching a polarizing plate to the outer surface.

[0004]

In the above-mentioned conventional liquid crystal display element, since the outer peripheral portions of the glass substrates 1 and 2 extend in a cantilever shape from the seal pattern 3, this extended portion is formed by a slight external force. It is easy to bend or vibrate, and the extended portions of the glass substrates 1 and 2, especially the most external force, act during handling in each process after manufacturing the empty cell container, such as the step of injecting liquid crystal into the empty cell container. Easy to crack or chip in the four corners. Such inconvenience is caused especially by the glass substrates 1 and 2.
As a result, it tends to occur when a thin glass plate having a plate thickness of about 0.4 mm to 0.7 mm is used.

The present invention has been made in order to solve the deficiencies of the above-mentioned prior art, and its object is to increase the strength of the glass substrate and to bond a liquid crystal display element which can be manufactured as a good product with a high yield. To provide.

[0006]

In order to achieve the above object, the present invention provides an upper glass substrate and a lower glass substrate having transparent electrodes with the transparent electrodes inside and an interposing between the glass substrates. In the liquid crystal display element pasted through the provided seal pattern, at least the four corners of the glass substrate outside the seal pattern were adhered using a sealant that constitutes the seal pattern.

[0007]

When the portions of the upper glass substrate and the lower glass substrate that are outside the seal patterns are bonded, the strength of the portions is improved, and bending and vibration are less likely to occur even when an external force is applied. Therefore, not only are cracks and chips less likely to occur during handling, but even if a part of the glass substrate is cracked or chipped, its progress is stopped at the bonded part, making it unusable as a product. Since it is difficult to develop into a serious defect,
The yield of non-defective products can be improved. Further, when the outer peripheral edge of the glass substrate is adhered by the sealant for forming the seal pattern, the adhesive pattern can be printed at the same time in the step of printing the seal pattern, which may complicate the manufacturing process. Absent.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view of a liquid crystal cell according to this embodiment, and FIG. 2 is a side view of the liquid crystal cell. In these figures, reference numeral 7 indicates a bonding pattern of the glass substrate, and other portions corresponding to those in FIG. 4 have the same reference numerals.

As shown in these figures, in the liquid crystal cell of the present example, the outer portions 4 of the seal patterns 3 at the four corners of the upper glass substrate 1 and the lower glass substrate 2 are provided with dot-shaped adhesive patterns 7.
The other part is formed in the same manner as the conventional liquid crystal cell shown in FIGS. 4 and 5. The adhesive pattern 7 is formed by the same sealant as the sealant forming the seal pattern 3, that is, a seal base such as an epoxy resin or an ultraviolet curable resin mixed with a glass spacer or the like for controlling the cell gap. To be done. This adhesive pattern 7
The formation position of is set slightly inside the cutting position in order to prevent it from protruding in a burr shape from the outer peripheral edges of the glass substrates 1 and 2. Furthermore, this adhesive pattern 7
In order to simplify the manufacturing process of the liquid crystal cell, the seal pattern 3 is printed and formed at the same time as the seal pattern 3 in the printing process. In addition, the method of forming a transparent electrode (not shown) on the glass substrates 1 and 2, the method of forming the seal pattern 3, the method of attaching the glass substrates 1 and 2, and the method of injecting liquid crystal are generally better than before. Since the method is the same as the known method, its explanation is omitted.

In the liquid crystal display element of the above-mentioned embodiment, since the four corners of the upper glass substrate 1 and the lower glass substrate 2 are adhered to each other through the adhesive patterns 7, the strength of the portion 4 of the glass substrates 1 and 2 outside the seal pattern 3 is higher. It is improved, and it becomes difficult to cause bending and vibration even when receiving an external force. Therefore, not only are cracks and chips less likely to occur during handling, but even if cracks or chips occur at the four corners of the glass substrates 1 and 2, the progress is stopped by the adhesive pattern 7, and the product cannot be used as a product. Since it is difficult to develop into such a serious problem that becomes, the yield of non-defective products can be improved. Further, since the adhesive pattern 7 is formed by printing at the same time as the seal pattern 3, the manufacturing process is not complicated, and only the four corners of the glass substrates 1 and 2 are adhered. Only a small increase in usage is required. Therefore, it can be implemented with almost no increase in manufacturing cost.

In the above-mentioned embodiment, only the case where the dot-shaped adhesive pattern 7 is formed only at the four corners of the glass substrates 1 and 2 has been described, but the shape and arrangement of the adhesive pattern 7 are not limited to these embodiments. However, it can be set arbitrarily. For example, the dot-shaped adhesive patterns 7 can be arranged in a broken line shape along the outer peripheral edges of the glass substrates 1 and 2.

Further, in the above embodiment, the case where the glass substrates 1 and 2 having the same size are bonded to each other has been described. However, two glass substrates, large and small, are attached to the side of the small glass substrate. In the liquid crystal cell in which the side portions are projected and bonded together, the adhesive patterns 7 are formed at least at the four corners of the small glass substrate.

[0013]

As described above, according to the present invention,
Since the portions outside the seal patterns of the upper glass substrate and the lower glass substrate are bonded together, the strength of these portions is improved, and cracks and chips during handling can be prevented. Moreover, since the outer peripheral edge of the glass substrate is adhered by the sealant for forming the seal pattern, the seal pattern and the adhesion pattern can be formed by printing at the same time, and the manufacturing process is not complicated. Therefore, it is possible to provide a liquid crystal cell that is inexpensive and has a high yield of non-defective products.

[Brief description of drawings]

FIG. 1 is a plan view of a liquid crystal cell according to a first embodiment.

FIG. 2 is a side view of the liquid crystal cell according to the first embodiment.

FIG. 3 is a plan view of a liquid crystal cell according to a conventional example.

FIG. 4 is a side view of a liquid crystal cell according to a conventional example.

[Explanation of symbols]

 1 Upper Glass Substrate 2 Lower Glass Substrate 3 Seal Pattern 4 Outside of Seal Pattern 3 7 Adhesive Pattern

Claims (1)

Claim: What is claimed is: 1. An upper glass substrate and a lower glass substrate having transparent electrodes are attached to each other with the transparent electrode inside and a seal pattern interposed between the glass substrates. In the liquid crystal display element, the liquid crystal display element is characterized in that at least four corners of the glass substrate outside the seal pattern are adhered to each other by using a sealing material forming the seal pattern.