JP2718667B2 - Manufacturing method of liquid crystal display element - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a liquid crystal display device, and more particularly to a method for manufacturing a liquid crystal display device suitable for improving the uniformity of the color tone of the display surface of the liquid crystal display device. About. [Prior art] An electrode terminal for applying a voltage to an electrode pattern formed on an inner surface of a glass substrate facing a liquid crystal display element is transferred to only one substrate to facilitate connection with an external circuit. Has been done. This is performed by interposing a conductive paste between at least a part of the opposing electrode patterns to electrically short-circuit these electrode patterns (Japanese Utility Model Publication No. 59-5851 and Japanese Patent Publication No. 60-1985). No. 11331, Japanese Utility Model Publication No. 60-20103 and Japanese Patent Publication No. 56-36537). The short circuit between the electrode patterns for such a purpose is hereinafter referred to as upper and lower connection. On the other hand, in the production of liquid crystal display elements, in order to facilitate mass production, an electrode pattern is formed in advance on the same glass substrate so as to constitute a plurality of liquid crystal display elements, and then divided into individual liquid crystal display elements. A method of manufacturing a liquid crystal display device having the structure described in JP-A-50-112060 has been proposed.
No.). Hereinafter, such a method of manufacturing a liquid crystal display element is referred to as multi-cavity production. In this method, to seal a pair of glass substrates at a predetermined interval, a frame-shaped sealing agent formed on a glass substrate in a size unit of a liquid crystal display element and the conductive paste for the upper and lower connection, It is formed on one or both glass substrates by screen printing. It should be noted that, as the applicant has filed the application earlier,
There is 514 publication. JP-A-63-34514 discloses a technique for increasing or decreasing the cross-sectional area of a conductive paste according to the density of the number of conductive pastes. However, in the multi-cavity manufacturing method, the idea of increasing or decreasing the volume or the cross-sectional area of the conductive paste depending on the density of the number of the conductive paste formed on the substrate before being divided into the liquid crystal display elements is not disclosed. [Problems to be Solved by the Invention] In the above conventional example, consideration has been given to the nonuniformity of the gap between the upper and lower glass substrates when the upper and lower connection points provided with a plurality of surfaces are partially concentrated for multi-cavity. However, there is a problem that the gap between the upper and lower connection portions becomes excessively large, and the color uniformity of the liquid crystal display element is impaired. An object of the present invention is to eliminate gap non-uniformity due to partial concentration of the upper and lower connection points. [Means for Solving the Problems] The above problems can be solved by making the size of the upper and lower connection points of a part concentrated locally in multi-cavity manufacturing smaller than that of the upper and lower connection points of other parts. You. [Operation] Usually, the gap between the upper and lower substrates of the 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
A desired cell gap is obtained by uniformly applying a load after assembling the two substrates and having a thickness of about 20 to 40 μm. However, the upper and lower connecting members, which are metallic conductive materials, are harder to collapse than the sealing members. Therefore, the upper and lower connection points are likely to have a large gap between the glass substrates, particularly when many upper and lower connection points are concentrated. If the size of the upper and lower connection points in a large number of concentrated locations is smaller than the upper and lower connection points in other parts, the bias of the resistance to the load is reduced, and the uniformity of the gap is easily obtained. Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows a plurality of upper and lower connection points 3 between the glass substrates 1 and 2.
FIG. 5 is a schematic plan view of a liquid crystal display element 5 having the following. Where 4
Is a frame-shaped sealing agent, and 6 is an electrode pattern. FIG. 1 is a diagram of a large-sized multi-cavity arrangement in which a plurality of liquid crystal display elements 5 shown in FIG. 2 are arranged. In this case, the upper and lower connection points are more concentrated at the center of the large plate than at the ends, and the number is twice as large as at the ends. Therefore, the size of the upper and lower connection points at the end is φ0.4, and the size of the upper and lower connection points at the center is φ0.3.
It is. According to this embodiment, there is an effect that the resistance of the upper and lower connecting materials to the load at the time of forming the gap between the glass substrates can be made uniform. Generally, in FIG. 1, sides AB and CD of the glass substrate 1
It is preferable that the diameter of the upper and lower connection points near the center straight line EF is 55 to 85% of the diameter of the nearby upper and lower connection points. [Effects of the Invention] According to the present invention, the resistance to the load at the time of forming the gap between the substrates 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 the uniformity of the color tone of the LCD display surface can be obtained. Can be

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a glass substrate for explaining an embodiment of the present invention, and FIG. 2 is a plan view for explaining a liquid crystal display device. 1,2 ... glass substrate, 3 ... upper and lower connection points, 4 ... sealant, 5 ... liquid crystal display element, 6 ... electrode pattern.

   ────────────────────────────────────────────────── ─── Continuation of front page    (56) References JP-A-50-112060 (JP, A)                 JP-A-58-140779 (JP, A)                 58-65019 (JP, U)                 Tokiko 8-3590 (JP, B2)                 Tokiko Sho 60-11331 (JP, B2)                 Jikku Sho 59-5851 (JP, Y2)

Claims (1)

(57) [Claims] A first electrode group and a second electrode group are provided facing each other on the first electrode substrate and the second electrode substrate so as to correspond to a plurality of liquid crystal display elements, and the first and second electrode groups are provided. For each of the opposing electrode groups on at least one of the electrode substrates, a plurality of conductive members for electrically connecting the electrode groups are provided, the first and second electrode substrates are overlapped, and the electrode is formed by the conductive members. After electrically connecting the groups, in a method of manufacturing a liquid crystal display element in which each liquid crystal display element is divided into individual pieces by an amount corresponding to the number of the liquid crystal display elements, the liquid crystal display element is divided into individual pieces. Previously, the conductive member on at least one of the first and second electrode substrates, at equal intervals along the edge of the liquid crystal display element after being divided into individual sizes, and the number of the conductive member Density differs depending on the position on the substrate, and A method for manufacturing a liquid crystal display element, wherein the conductive member is formed so that the volume or cross-sectional area of the conductive member increases or decreases depending on the density of the conductive member.