JPS6337375A - Manufacture of liquid crystal display element - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a liquid crystal display element, and in particular, a method for manufacturing a liquid crystal display element suitable for improving the uniformity of the display surface color tone of a liquid crystal display element. Regarding.

[Conventional technology]

Electrode terminals for applying voltage to electrode patterns formed on the inner surfaces of opposing glass substrates of liquid crystal display elements have been moved to only one substrate to facilitate connection with external recirculating heat. There is. This is accomplished by interposing a conductive paste between at least a portion of the opposing electrode patterns to electrically short-circuit the electrode patterns (Utility Model Publication No. 5851/1983, Japanese Patent Publication No. 1983/1983). 1
1331, Japanese Utility Model Publication No. 60-20103, and Japanese Patent Publication No. 56-36537). A short circuit between electrode patterns for this purpose is hereinafter referred to as an upper and lower connection.

On the other hand, in the manufacture of liquid crystal display elements, in order to facilitate mass production, electrode patterns are formed in advance on the same glass substrate to form a plurality of liquid crystal display elements, and then the liquid crystal display elements are individually divided. A method for manufacturing a liquid crystal display element has been proposed (Japanese Patent Laid-Open No. 112-1989
060 Publication).

Hereinafter, this method of manufacturing a liquid crystal display element will be referred to as multi-chip manufacturing. In this method, a frame-shaped sealing agent is formed on the glass substrate in units of the size of the liquid crystal display element in order to seal the pair of glass substrates at a predetermined interval, and a conductive paste for the above-mentioned vertical connection is used. It is formed on one or both glass substrates by screen printing.

[Problem that the invention seeks to solve]

In the conventional example above, no consideration was given to the unevenness of the gap between the upper and lower glass substrates when the upper and lower connection points, which are surfaced in multiple places, are concentrated locally due to multi-chip manufacturing, and the gap between the upper and lower connection parts is too large. There was a problem in that the color uniformity of the liquid crystal display element was impaired.

An object of the present invention is to eliminate gap non-uniformity caused by partial concentration of upper and lower connection points.

[Means for solving problems]

The above-mentioned problem is solved by making the size of the upper and lower connection points in a concentrated area smaller than that of the upper and lower connection points in other parts in multi-piece manufacturing.

resolved.

[Effect]

Normally, the gap between the upper and lower substrates of a liquid crystal display element is 10 μm.
However, since the sealing material and the upper and lower connecting materials are formed by screen printing, the coating thickness at the time of printing is approximately 20 to 40 μm. After assembling the two boards, the desired thickness can be achieved by applying a uniform load. We have obtained a cell gap of . However, the upper and lower connecting materials, which are made of metallic conductive materials, are more difficult to crush than the sealing materials, so the gap between the glass substrates tends to become larger at the upper and lower connection points, especially when there are many upper and lower connection points concentrated. be.

By making the size of the upper and lower connection points at a location where a large number of them are concentrated smaller than that of the upper and lower connection points at other parts, the resistance force against the load will be less biased, and it will be easier to obtain uniformity of the gap.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a schematic plan view of a liquid crystal display cable 5 having a plurality of upper and lower connection points 3 between glass substrates 1 and 2. FIG. Here, 4 is a frame-shaped sealing agent, and 6 is an electrode pattern. 1st
The figure is a diagram of a large-scale multi-layer printing plate in which a plurality of liquid crystal display elements 5 shown in FIG. 2 are arranged side by side. In this case, in the center of the large plate, the number of upper and lower connection points is more concentrated than in the edges, and the number is twice as large as that in the edges. Therefore, the size of the upper and lower connection points at the ends is set to φ0.4, and the size of the upper and lower connection points at the center is set to φ0.3.

According to this embodiment, the load 2 when forming the gap between glass substrates is
This has the effect of equalizing the drag force of the upper and lower connecting materials against 1.

Generally, in FIG. 1, the sides AB and C of the glass substrate 1 are
It is preferable that the diameter of the upper and lower connection points near the central straight line EF is 55 to 85% of the diameter of the upper and lower connection points near D.

〔Effect of the invention〕

According to the present invention, the resistance against the load when forming the inter-substrate gap can be made uniform, so that the uniformity of the gap between the upper and lower substrates of the liquid crystal display element can be obtained, and therefore the uniformity of the color tone of the LCD display surface can be obtained.

[Brief explanation of drawings]

FIG. 1 is a plan view of a glass substrate for explaining one embodiment of the present invention, and FIG. 2 is a plan view for explaining a liquid crystal display element.

Claims (1)

[Claims] 1. On one glass substrate, after printing an electrode pattern, a sealant, and a conductive paste for short-circuiting the opposing electrode patterns in an amount equivalent to a plurality of liquid crystal display elements, this glass substrate and another glass substrate are printed. In the method for manufacturing a liquid crystal display element, the liquid crystal display element is sealed with the sealing agent at a predetermined interval, and then is individually divided into the sizes of each liquid crystal display element, wherein the glass substrate is printed on the edge of the one glass substrate and its vicinity. A method for manufacturing a liquid crystal display element, characterized in that the size of the conductive paste printed near the center of the one glass substrate is made smaller than the size of the conductive paste printed on the glass substrate.