JP2776329B2 - Liquid crystal display device and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal display device and a method for manufacturing the same.

[0002]

2. Description of the Related Art A conventional liquid crystal display device is shown in FIGS.
As shown in FIG. 1, the electrode terminals 8 for connecting to the driving circuit are arranged on two or three sides of the panel 1, and one or a plurality of liquid crystal injection ports 5 are provided on one side. When the liquid crystal 3 is injected into the panel 1, the liquid crystal injection port 5 of the panel 1 is used.
The liquid crystal 3 introduced into the groove 6 of the liquid crystal dish 9 in which the groove 6 is provided on the flat plate is brought into contact with the liquid crystal injection port 5 in a vacuum so that the liquid crystal 3 is turned downward. When 5 was sufficiently covered, the surroundings were returned to atmospheric pressure, and the liquid crystal 3 was injected into the panel 1 with a pressure difference between the inside and outside of the panel 1. In this conventional liquid crystal display device and its manufacturing method, there is a disadvantage that it takes time to inject the liquid crystal 3 when the display screen of the liquid crystal display device is to be enlarged. In recent years, the size of the screen, which has many needs in the market, is 25 cm in angle of view.
When the panel 1 exceeds 100, the time required for injection is 100
Beyond that, it is a factor in cost increase.

Several proposals have been made to remedy this drawback. Among them, Japanese Patent Application Laid-Open No. Hei 5-173150 discloses that a cell structure is formed by an outer seal and inner seal.
A method has been proposed in which the liquid crystal 3 is injected by providing a pair of liquid crystal injection ports 5 on opposite sides of the inner seal of the screen of the panel 1 while suppressing the reduction in strength. Further, Japanese Unexamined Patent Publication No.
Japanese Patent Application Laid-Open No. 165038 proposes a method of injecting the liquid crystal 3 in which a liquid crystal injection port 5 is provided in the pair of opposing sides so that no bubbles remain inside. Further, Japanese Unexamined Patent Publication No.
No. 34 proposes a method for simultaneously injecting the liquid crystal 3 in a plurality of panels 1 having a plurality of liquid crystal injection ports 5 on the pair of opposing sides as described above, and a manufacturing apparatus therefor. The above-mentioned proposal is intended to provide a plurality of liquid crystal injection ports 5 and to separate the liquid crystal injection ports 5 as much as possible so that the liquid crystal 3 injected into the panel 1 from each of the liquid crystal injection ports 5 does not interfere at an early stage. It is characterized in that a liquid crystal injection port 5 is provided on the side pair.

However, although the above proposals certainly have the effect of shortening the time, the liquid crystal injection port 5 is provided on each side facing each other, so that the method apparatus for injecting the liquid crystal 3 is different from the conventional one. Complex and large. That is, in Japanese Patent Application Laid-Open No. 5-173150, an extra area around the display screen becomes large because the seal 7 is double of an outer seal and an inner seal. In addition, the effect of reducing the injection time of the liquid crystal 3 is reduced, and the two are not compatible. Also, Japanese Unexamined Patent Publication No.
In the method and apparatus disclosed in JP-A-165038 and JP-A-5-323334, when the liquid crystal 3 is simultaneously injected into a large number of panels 1 at the same time, a corresponding number of liquid crystal supply nozzles are required, and therefore, there is a need for mass production. In the case of an apparatus, the number of nozzles becomes several hundred just by the number of nozzles, and the structure becomes complicated and the scale becomes large. This imposes a heavy load both technically and costly. Furthermore, since the liquid crystal 3 is simply dropped on the panel 1, the liquid crystal 3
If the size of the panel 1 changes, the positions of all the nozzles must be changed and adjusted.

[0005]

The conventional liquid crystal display device and its manufacturing method have a problem that the liquid crystal injection time becomes longer as the size of the panel becomes larger. In the technique described above, when injecting liquid crystal into a large number of panels at once, the structure of the liquid crystal injection device becomes complicated and the scale becomes large, and further, there is a problem that the inside of the liquid crystal injection device is easily contaminated. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device in which the liquid crystal injection time can be shortened, the structure of the liquid crystal injection device is simple, and the inside of the liquid crystal injection device is not contaminated, and a method of manufacturing the same.

[0007]

The liquid crystal display device of the present invention According to an aspect of the first adjacent the connection terminal portion of the driver circuit to each other
The first side and the second side are collectively provided on the side and the second side.
Each of the third side and the fourth side respectively facing the side of
It has a panel with at least one liquid crystal injection port
The panel is sealed only at the periphery of the two glass substrates.
Characterized in that it is le.

[0008] manufacturing method of a liquid crystal display device of the present invention, the drive
The first terminal and the first side adjacent to each other
The first side, the second side and the second side are collectively provided on the second side.
A liquid crystal is applied to each of the third and fourth sides facing each other.
A panel provided with at least one inlet,
The glass is sealed only at the periphery of the two glass substrates.
Preparing a substrate, and a third side and a third side of the panel.
And a liquid crystal provided in the concave portion corresponding to the side of No. 4 and the concave portion.
A compound for supplying liquid crystal to the inlet independently for each side.
The liquid crystal injection port has a side in the concave portion of the jig provided with a number of grooves.
Wherein placing the panel in contact with one of the grooves obliquely to each, after the jig each of the panel was aspirated whole placed in a vacuum chamber to a vacuum, the said liquid crystal from the jig top each a step of supplying the liquid crystal to each of the grooves, and a step of breaking the vacuum of the vacuum chamber while supplying the liquid crystal continuously , returning the periphery of the panel to atmospheric pressure, and injecting the liquid crystal into the panel by a pressure difference between the inside and outside of the panel. And a step of performing the following.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a plan view of a panel mounted on a jig for explaining a method of manufacturing a liquid crystal display device according to a first embodiment of the present invention. In the method for manufacturing a display device according to the first embodiment of the present invention, first, as shown in FIG.
The jig 4 has a concave portion provided with a groove 6 for supplying the liquid crystal 3 on each of two sides. The panel 1 is arranged such that one liquid crystal injection port 5 provided on each of two sides adjacent to the concave portion is in contact with the groove 6.
Is placed diagonally. Next, the panel together with the jig 4 is placed in a vacuum tank (not shown), and the whole is sucked into a vacuum. Next, the liquid crystal 3 is supplied to the groove 6 from above the jig 4 by the liquid crystal supply dispenser 2 or the like. At this time, the liquid crystal 3 is connected to the liquid crystal injection port 5 provided on two adjacent sides of the panel 1 by connecting the groove 6.
Cover. Next, while continuously supplying the liquid crystal 3, the vacuum in the vacuum chamber is broken to return the surroundings of the panel 1 to the atmospheric pressure, and the liquid crystal 3 is injected into the panel 1 by a pressure difference between the inside and outside of the panel 1. At this time, since the adjacent liquid crystal injection ports 5 are sufficiently spaced apart from each other, the liquid crystal 3 injected from each liquid crystal injection port 5 does not interfere with each other. The liquid crystal 3 is injected into the panel 1 in a shorter time than in the case where only the liquid crystal 3 is used. Further, unlike the conventional example in which the liquid crystal injection port 5 is provided on the opposite side, the liquid crystal injection port 5 is provided on two adjacent sides.
Is provided, the liquid crystal 3 can be introduced and injected to the liquid crystal injection port 5 only by providing the groove 6 in the jig 4 for fixing the panel 1 at an angle of about 45 °, so that the structure of the liquid crystal injection apparatus is simplified. Thus, the liquid crystal 3 can be simultaneously injected into a large number of panels 1 without increasing the scale. Further, since the entire liquid crystal 3 is received by the jig 4, the inside of the liquid crystal injection device is not contaminated.

In the present embodiment, the liquid crystal injection time is 30 times shorter than that of the conventional panel 1 in which the liquid crystal injection port 5 is provided on one side of FIG.
The result is that it can be reduced by ~ 40%.

FIG. 2 is a plan view of a panel mounted on a jig for explaining a method of manufacturing a liquid crystal display device according to a second embodiment of the present invention. The manufacturing method of the liquid crystal display device according to the second embodiment of the present invention is similar to that of the first embodiment except that a plurality of liquid crystal injection ports 5 are provided on two adjacent sides as shown in FIG. Is the same. By using a plurality of liquid crystal injection ports 5, interference when the liquid crystal 3 is injected can be reduced in proportion to the distance between the liquid crystal injection ports 5, and the influence can be reduced. Can be shortened. The use of a plurality of liquid crystal injection ports 5 also has the effect of widening the opening of the flow path of the liquid crystal 3. Actually, the liquid crystal injection time is not reduced in a simple proportional relationship due to the internal resistance of the panel 1 or the like. However, the liquid crystal injection time can be reduced by 20 to 30% as compared with the conventional liquid crystal panel 1 shown in FIG. I have.

[0013]

As described above, according to the present invention, the distance between the liquid crystal injection ports is increased, and the liquid crystal injection ports are provided on two adjacent sides to prevent the injected liquid crystals from interfering with each other. It has the effect of greatly shortening the liquid crystal injection time, and furthermore, it is possible to prevent the liquid crystal injection device from being contaminated due to spilling of liquid crystal without having to increase the scale while keeping the structure of the liquid crystal injection device simple. It also has an effect.

[Brief description of the drawings]

FIG. 1 is a plan view of a panel mounted on a jig for describing a method of manufacturing a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a plan view of a panel mounted on a jig for explaining a method of manufacturing a liquid crystal display device according to a second embodiment of the present invention.

FIG. 3 is a plan view of a panel for explaining an example of a conventional method for manufacturing a liquid crystal display device.

FIG. 4 is a plan view of a panel for explaining another example of a conventional method for manufacturing a liquid crystal display device.

[Explanation of symbols]

 Reference Signs List 1 panel 2 liquid crystal supply dispenser 3 liquid crystal 4 jig 5 liquid crystal inlet 6 groove 7 seal 8 electrode terminal 9 liquid crystal dish

Claims (2)

(57) [Claims] 1. A provided by aggregating the first side and a second side adjacent to each other the connection terminal portion and the driving circuit, the first
A third side and a fourth side which are respectively opposed to the side and the second side.
A panel with at least one liquid crystal injection port on each side
Panel, and the panel is provided on the periphery of two glass substrates.
A liquid crystal display device characterized by being sealed with a seal . 2. A terminal for connection to a drive circuit is adjacent to each other.
The first side and the second side are collectively provided.
A third side and a fourth side which are respectively opposed to the side and the second side.
A panel with at least one liquid crystal injection port on each side
Panel, and the panel is located on the periphery of two glass substrates.
Preparing an object which is sealed only with
Recesses corresponding to the third and fourth sides of the shell and the recesses
The liquid crystal injection port is provided independently for each side.
In the recess of the jig provided with a plurality of grooves for supplying
The panel was placed obliquely so that the liquid crystal injection port was in contact with one of the grooves for each side, and the panel was placed in a vacuum chamber together with the jig and the whole was suctioned to a vacuum. and supplying from each of the jig top to the respective groove, pull
The liquid crystal display characterized in that it comprises the step of continued injection of the liquid crystal by the internal and external pressure differential of the panel returned to ambient atmospheric pressure of the liquid crystal the panel breaking the vacuum of the vacuum chamber while supplying to said panel Device manufacturing method.