JPS6055812B2 - Manufacturing method of optical display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an optical display panel.

An object of the present invention is to encapsulate an optical display material between a first substrate and a second substrate on which a large number of sealing materials are formed, and then cut these substrates.
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In the conventional multi-unit manufacturing method, when cutting and separating individual optical display panels, the first substrate and the second substrate, which are bonded to each other with a sealant, are cut and separated at the same time.

However, since the two upper and lower substrates constituting each optical display panel are provided with an electrode extraction portion on one side, the external shapes of these substrates are not the same. Therefore, the cutting lines of the first substrate and the second substrate do not match. It has been difficult to simultaneously separate such a first substrate and a second substrate using a diamond cutter or the like. In addition, even if you try to cut only one substrate using a high-speed rotating grindstone, there is a possibility that the other substrate will be damaged because the distance between the first substrate and the second substrate is about 10μ in height. It was expensive. Furthermore, in the past, even if a large number of optical display materials could be injected and sealed at the same time, the electrical characteristics of the optical display panels could only be inspected after they were separated into individual optical display panels.

In order to eliminate such defects, the present invention forms a concave groove in advance in one substrate corresponding to its cutting line, and after assembly, first cuts the one substrate by a predetermined width along the concave groove. The removed part is removed, the electrical characteristics are tested, and the other board is then cut through the removed part.

The manufacturing method of the present invention will be explained in detail below with reference to embodiments shown in the drawings, taking a liquid crystal display panel as an example. One electrode per panel is placed on the upper electrode substrate 1 (including electrodes, insulated cords, and alignment treatment) of the liquid crystal display panel shown in FIG. Through holes 2a, 2b, 2c are provided correspondingly, and seals 4a, 4b, 4c which also function as spacers are provided on the lower electrode substrate 3 (including electrodes, insulated cords, and alignment treatment).
,... are formed. As shown in Figure 2, it opens at parts A, 0, and C, and both ends, for example, parts P and q, are connected to R and S of adjacent seals, respectively, or as shown on the left side of the figure. By connecting the T and u parts,
It expands itself to form a narrow portion, and when the upper and lower electrode substrates are stacked, the through holes 6a and 6b provided in the upper electrode substrate 1 are formed as shown in FIG. ,6
Prepare a panel that surrounds part c and is formed in a position such that its openings 2, 5, and 6 communicate into the inside of the panel. However, this through hole does not necessarily need to be provided on the upper substrate 1, and may be provided on the electrode substrate 3 on the side to which the sealing material is provided. Now, after overlapping the upper and lower electrode substrates prepared in this manner and assembling them by thermocompression bonding as shown in FIG. 4, the existing through holes 6a, 6b, 6 are assembled.
The liquid crystals 7a, 7b, and 7c are injected through the liquid crystals 7a, 7b, and 7c completely to the inside of the panel as shown by hunting in the figure. Thereafter, the sealing materials 8a, 8b, and 8c are again filled into the chamber formed by the narrow portion and the upper and lower substrates using the same existing through holes. the. At this time, the amount of sealing material permeating into the inside of the panel is determined exactly at the position inside the seal 5, for example, Z-Z'' in the figure.
Control it so that it comes to the line. After that, for example, the sealing material 8
After the curing time of a, 8b, and 8c has elapsed, the panel is cut along the outline lines JY, Y2, Y3, Y4, and Y5 shown in the figure, or Y.

-Yl, Y2-Y3, Y4-Y5 widths and processed into strips as shown in Ya, Yb, and Yc in FIG. At this time, the sealing material remains neatly in the shapes shown in 9a, 9b, and 9c, and the sealing properties are maintained. In order to complete the sealing performance, it is also conceivable to further apply a sealing material to the sealing opening in a subsequent appropriate step. Now, regarding the subsequent manufacturing method for finishing a single panel, in the embodiment of the present invention, concave grooves are processed, including the aim of creating accurate outlines.

The description will be continued below with reference to the drawings. FIG. 6 is a three-dimensional diagram basically showing the structure of a panel according to the manufacturing method of the present invention described above.

However, for convenience of explanation, the upper and lower electrode substrates are reversed, and the through holes and sealing material are attached to the same substrate. That is, 10 is a lower electrode substrate, 11 is an upper electrode substrate, 12 is an electrode pattern of the lower electrode substrate, 13 is an upper electrode, and 13a and 13b are electrode leads thereof, which are arranged in a row. 14 is a through hole, 15
indicates the shape of the sealing material attached on the electrode substrate.

Now, based on this configuration, the electrode leads 13a,
At a predetermined position of the other electrode substrate 10 facing the substrate 11 having the electrode 13b, a seventh concave groove as shown in 16 and 17 is formed.
As shown in the figure, slit-like concave grooves 16a and 16b may be used.

) is cut to a predetermined width using a grindstone.
Thereafter, according to the manufacturing method described above, the upper and lower electrode substrates are stacked and assembled by thermocompression bonding, etc., and then formed into the shape shown in FIG. 8, liquid crystal is injected through the through hole 14, and then sealed. Fill with stopper material. Thereafter, as shown in FIG. 9, portions 10b and 10c are removed by cutting or cutting in the directions X3, X4, X5, and X6 following the width of the existing concave groove.

(The part 10a remains because it has already been integrated with the member 11 using the sealing material.) X3, X4, X5, X6
When cutting or cutting, the other substrate will not be damaged because of the recessed groove.

After such a process, the electrode leads 13a and 13b are exposed from the removed portion, and therefore, inspection items to be evaluated by applying voltage to the liquid crystal panel can be checked in this state. become.

Moreover, the inspection can be performed on a large board (without making it into a single panel), which can be expected to significantly shorten inspection time. Now, regarding the subsequent steps leading to simple substance separation,
After processing into the above-described shape, basically two steps can be considered.

One method is to cut or break the panel along the directions Xl and X2 after following the method shown in FIG. 4 to FIG. 5, and the other method is to cut or break the panel from the shape shown in FIG. After cutting or breaking one piece in the direction of outline lines Xl and X2 to form the shape shown in FIG. It can be finished into one panel as shown. The present invention is applicable not only to liquid crystal display panels but also to general optical display panels using liquid substances such as electrophoretic display devices and electrochromic display devices.

According to the method for manufacturing an optical display panel of the present invention, as explained above, since one substrate is cut and then another substrate is cut, the yield when separating and cutting individual optical display panels is improved. In addition, by cutting and removing one of the substrates by a predetermined width, there is an effect that the electrical characteristics can be tested using the large substrate.

[Brief explanation of the drawing]

1 to 5 are plan views for explaining the manufacturing process of one embodiment of the present invention, and FIGS. 6 to 11 are optical displays for explaining the manufacturing process of other embodiments. It is a perspective view of a panel. 1, 3, 10, 11...Substrate, 4a, 4b, 4c, 5
, 15... sealing material, 6a, 6b, 6c, 14...
Through holes, 8a, 8b, 8c, 9a, 9b, 9c, 9...
・Encapsulation material.

Claims (1)

[Scope of Claims] 1. After sealing an optical display material between a first substrate and a second substrate on which a large number of sealants are formed, the first and second substrates are sealed.
In a method of manufacturing a large number of optical display panels by cutting a substrate, a concave groove is formed in advance in at least one of the substrates, and the first substrate and the second substrate are cut.
After assembling the substrates and injecting and sealing the optical display material, one of the substrates is cut and removed by a predetermined width along a concave groove formed in one of the substrates, and then the other substrate is cut through this removed portion. A method of manufacturing a large number of optical display panels, characterized in that: 2. After cutting and removing one of the substrates by a predetermined width along a concave groove formed in one of the substrates, inspecting the electrical characteristics of each optical display panel in this state, and then cutting the other substrate through this removed portion. 2. The method of manufacturing an optical display panel according to claim 1, further comprising cutting the substrate.