JPH0373930A - Manufacture of liquid crystal display panel - Google Patents

Abstract

PURPOSE:To seal a 1st and a 2nd substrates over the entire surface with a sealing material while a specific gap is left and to enable safe operation and easy manufacture by sealing the 1st and 12nd substrates with the sealing material while pressing them by an air bag which uses air pressure. CONSTITUTION:The air bag 103 is arranged on a base material 101 and a reference flat plate 105 is arranged thereupon; and the two 1st and 2nd substrates 17 and 108 which are stuck together are placed on the flat plate 105 and a thin plate 196 is placed on the substrate 108. Further, the same air bag 104 as the air bag 103 is arranged thereupon, covered with an upper base material 102, and fixed with a stopper 111. Then compressed air is injected into the air bags 103 and 104 to apply pressure to the 1st substrate 107 and 2nd substrate 108 and the pressure is adjusted to constant pressure. Consequently,the two substrates can be sealed uniformly with the sealing material over the entire surface while the specific gap is left, and the safe operation and easy manufacture are realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for sealing a liquid crystal display panel with a sealant during an assembly process.

[Conventional technology]

Conventionally, the method shown in FIG. 3 has been used in the assembly process of sealing a liquid crystal display panel with a sealant. Figure 3 (a) is an example of using a veneer weight;
b) is an example in which a plurality of weights are used, and FIG. 3(c) is a sectional view showing an example in which the weight is applied by the spring pressure of an elastic member.

A sealing material 603 is provided at a predetermined position on a first substrate 301 having a transparent electrode, and a second substrate 602 having a transparent electrode is provided.
A spacer material 304 is provided to provide a predetermined gap. As this spacer material 604, glass beads, glass beads, etc. are used. Next, the first substrate 301
After bonding the first and second substrates 302 together in a predetermined position, they are placed in the jig shown in FIG. Sealing with the sealing material 303 is performed when the first substrate 601 and the second substrate 602 have undulations, warpage, or differences in partial thickness of the substrates (hereinafter referred to as uneven thickness). Therefore, it is not possible to obtain a predetermined gap over the entire surface of the first substrate 601 and the second substrate 602 by simply bonding the first substrate 601 and the second substrate 602 together. To explain the sealing jig using a single plate 606 shown in FIG. , improves flatness.Single plate 6
06 is made of iron-based material and is a first substrate 3 of a single plate 606.
The surface in contact with 01 is polished to improve its flatness. A first substrate 601 and a second substrate 602 are bonded together, placed between a base material 605 and a veneer 606, and using the weight of the veneer 6060, the first substrate 601 is attached to a second substrate.
Pressure is applied to the substrate 602 of the first substrate 601 and the second substrate 6.
Correcting warpage, waviness, uneven thickness with 02 1-, spacer 6
04, a first substrate 601 and a second substrate 602 are separated by a predetermined gap and are sealed with a sealing material 306. FIG. 3(b) shows the veneer 6 shown in FIG. 3(a).
06 instead of the first substrate 6 by a plurality of weights 608.
01 is applied to the second substrate 602 to correct the warpage, waviness, and uneven thickness of the first substrate 601 and the second substrate 3020. are separated by a predetermined gap and sealed with a sealing material 606 1
-It is something that is intended to be done. In FIG. 3(C), sealing is performed using a sealing material 606 while applying pressure using the restoring force of an elastic member, and the bonded first substrate 601 and second substrate 6 are sealed together.
02 is placed on the base material 610, and the elastic member 612 is placed through the thin plate 611, and pressure is applied using the upper base material 616.1- With the elastic member 612 compressed, the upper base is pressed by the stopper 314. The material 616 is used as a fixed I-.

[Problem to be solved by the invention]

As shown above, sealing jigs with various sealing materials are used. Not only can it not be obtained over the entire surface, but it also has various problems described below, leading to a decrease in yield in mass production of liquid crystal display panels.

In the case of the pressurizing method using the veneer 606 shown in FIG.
The surfaces in contact with the first substrate 301 and the second substrate 602 are finished flat, but because the first substrate 301 and the second substrate 602ε have uneven thickness, the first substrate 601 and the second substrate 602 have uneven thickness. It is not possible to uniformly press and attach the substrate 602 over the entire surface. Further, since the pressure is applied only by the weight of the veneer 6060, the weight of the veneer 306 becomes large. Currently, in the sealing process of the sealant 606 between the first substrate 601 and the second substrate 602, the weight and shite per unit area are 0.5'yi
/CIa Kara I IKII/c+a is required.
Single board 6060 when the board size is 30Cffl square
The weight will need 9 from 450 to 900. In order to manipulate such a heavy veneer 606, large-scale equipment is required, and the work is also dangerous.

In the conventional example using multiple weights shown in Fig. 3(b),
Compared to FIG. 3(a), it is more resistant to uneven thickness between the first substrate 601 and the second substrate 602, and can be applied uniformly to the two bonded first and second substrates 601 and 302. Although it is possible to apply pressure, a large number of weights 608 must be placed on it.
The work is troublesome.

In the conventional example using an elastic member shown in Fig. 3(e), since spring pressure is used, it is possible to apply pressure more uniformly and with a larger force compared to those mounted on a single plate or those using multiple weights. , Due to the structure of the jig, the base material 610 is warped, and the two bonded first and second substrates 601 and 602 are warped after being sealed with the sealant, and the subsequent steps cannot be carried out. It becomes difficult to do so.

An object of the present invention is to solve the above-mentioned problems and provide a first substrate and a second substrate.
It is an object of the present invention to provide a manufacturing method that is safe and easy, in which the entire surface of a substrate is sealed with a sealing material at a predetermined gap by applying pressure uniformly over the entire surface of the substrate.

[Means to solve the problem]

In order to achieve the above object, the method for manufacturing a liquid crystal display panel of the present invention uses the method described below.

a first substrate having a transparent electrode; a second substrate having a transparent electrode;
A first method of manufacturing a liquid crystal display panel in which the transparent electrodes are placed facing each other with a predetermined gap between the two substrates, the periphery of which is sealed with a sealing material, and then liquid crystal is sealed. In an assembly process of sealing a substrate and a second substrate with a sealant with a predetermined gap between them, the first substrate and the second substrate are sealed with the sealant while being pressed with an airbag using air pressure.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

The liquid crystal display panel shown in FIG. 2 is prepared as follows. First substrate 201 having transparent electrode 206 and transparent electrode 20
alignment films 20 on second substrates 202 having
5.206 is formed, and a rubbing process is performed on the first substrate 201 and the second substrate 202 on which the alignment films 205.206 are formed.

An epoxy resin is placed at a predetermined position on the rubbed first substrate 201 as a sealing material 208, and the temperature is 1.
Preheat at 00°C for 10 minutes. On the other hand, plastic beads are scattered as spacers 207 on the second substrate 202 which has been subjected to the ping treatment. The first substrate 201 and the second substrate 202 are aligned and bonded together, placed in the jig of the present invention shown in FIG. 1, and heated to 160° C. while applying pressure.
, the sealant 208 is baked for 90 minutes to harden and complete the sealing process. Next, inject the liquid crystal.

A jig for curing the sealing material in the sealing method of the present invention will be explained. An air bag 103 made of a rubber bag is placed on a base material 101, and a flat plate 105 serving as a reference is placed on this air bag 106.
5. The first of the two sheets pasted together as explained using Fig. 2 above.
A substrate 107 and a second substrate 108 are placed, and a thin plate 106 is placed on the first substrate 107 and second substrate 108.
On top of that is the same airbag 104 as the airbag 106.
, cover with the upper base material 102, and attach the stopper 11.
Fixed at 1. Thereafter, compressed air is injected into the air bags 106 and 104 to apply pressure to the two bonded first and second substrates 107 and 108. Air pressure is normally used at 0.5 kg/c+11 to L O-/era. Also, when curing the epoxy resin, the temperature is 160℃.
When firing is performed, the air inside the air bags expands and the pressure inside the air bags 103 and 104 increases, so a regulator is installed outside to adjust the pressure to a constant level. In this method, the bonded first substrate 107 and second substrate 108 follow the standard flat plate 105, and since the sealing material 109 is cured, the two bonded substrates are flat after firing, and henceforth No problems occur during the process. Also, since air pressure is used, the size of the two boards bonded together can be reduced to, for example, 30 cm.
If it is m square, it is easy to apply a force of 9 to 900 to a total of 450. Naturally, when this much force is applied, the base plate 101 will warp, but the flat plate 101 that serves as a reference
5, the first substrate 1 bonded together to become a product
07 and the second substrate 108 will not warp.

Further, since pressure is applied to the first substrate 107 and the second substrate 108 via the thin plate 106, the thin plate 106 will warp as necessary.
08 can be applied uniformly to the first substrate 10.
It is possible to correct warpage and waviness of the substrate 7 and the second substrate 108, and also to follow uneven thickness. Furthermore, the weight of the jig was also reduced due to the above structure.

As explained above, by using the air pack of the present invention, two substrates can be sealed with a sealant uniformly over the entire surface with a predetermined gap between them.

Although this embodiment has been explained using one set of two bonded substrates, it is also possible to place multiple sets of two bonded substrates on a jig at the same time and seal them with a sealant. .

〔Effect of the invention〕

In the manufacturing method of the present invention, an air pack is used.
By applying pressure uniformly over the entire surface of the two bonded substrates, the two substrates are sealed with a sealant evenly over the entire surface with a predetermined gap between them, thereby eliminating the uneven pressure found in conventional weight methods. The pressure does not cause the gap between the two substrates to become uneven, which reduces the yield, and the use of a simple jig eliminates the dangers of the work.

With the advent of super twist mode in recent years, the gap between two substrates must be made more uniform, and the present invention can also meet the above requirements.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a method for manufacturing a liquid crystal display panel according to an embodiment of the present invention, FIG. 2 is a sectional view showing the structure of a liquid crystal display panel manufactured according to an embodiment of the present invention, and FIG. 3(a)
, (b), (cl is a cross-sectional view for explaining the manufacturing method of a conventional liquid crystal display panel. 103.104... air bag, 107...
...First substrate, 108...Second substrate, 109...Sealing material. Figure 1 Figure 2

Claims (1)

[Claims] a first substrate having a transparent electrode; a second substrate having a transparent electrode;
In the first method of manufacturing a liquid crystal display panel, the substrates are placed opposite each other at a predetermined gap on the surface on which the transparent electrode is disposed, and the periphery is sealed with a sealing material, and then liquid crystal is sealed. In the assembly step of sealing the substrate and the second substrate with a sealant with a predetermined gap, the first substrate and the second substrate are sealed with the sealant while being pressed with an air bag using air pressure. A method for manufacturing a liquid crystal display panel.