JPH05265011A - Production of liquid crystal display element - Google Patents

Abstract

PURPOSE: To attain the high yield formation of a liquid crystal display element capable of suppressing variation in a gap value even when the quantity of liquid crystal is changed by forming frame-like sealing materials in accordance with the quantity of liquid crystal supplied to a glass base.

CONSTITUTION: The weight of liquid crystal 5 supplied to the glass base 1 is measured and the sealing area of the liquid crystal 5 is calculated based upon the specific gravity of the liquid crystal 5 and an objective gap value. On the other hand, the frame-like sealing materials 2 are formed so that the area of an inside area between the sealing materials 2 is the same as that of the sealing area of the liquid crystal 5 when both the glass bases 1 are stuck to each other and the objective gap value is obtained.

COPYRIGHT: (C)1993,JPO&Japio

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method of manufacturing an electrode pattern and alignment liquid crystal display device constructed by bonding a pair of glass substrates for liquid crystal subjected to the film.

[0002]

The production method of a conventional liquid crystal display device,
Electrode pattern and a pair of glass substrates having undergone the alignment film by polymerizing bonded via a frame-shaped sealing member, after assembly of the liquid crystal display device, which is formed by lacking a part of the sealing material liquid after injection of the liquid crystal by a vacuum injection method, the injection port,
The method for sealing the liquid crystal inlet is known.

[0003] Before a recent assembling a liquid crystal display device, this forms a liquid crystal display device to supply liquid to one of the glass substrate of the pair of glass substrates, then polymerizing said pair of glass substrates bonded manufacturing method of assembling a liquid crystal display element and has come to be employed. Figure 3
, After supplying the liquid onto a glass substrate, a prior art example showing a manufacturing method of the liquid crystal element to bond overlaps with the counter glass substrate. Figure 1 is a glass substrate for a liquid crystal display device, this glass substrate 1 side, together with the electrode pattern and the alignment layer for display made of ITO or the like (all not shown) are formed, a thermosetting or frame-shaped sealing member 2 made of a light-curable adhesive is formed. After being supplied to the liquid crystal on the glass substrate 1 is a liquid crystal sealed region surrounded by the frame-like sealing material 2, and through the sealing member 2 other glass substrate constituting the substrate 1 and the counter (not shown) It is polymerized adhesive Te. On the other hand, in FIG. 3, 3 is an air extrusion dispenser for supplying liquid to the liquid crystal sealing area of ​​the glass substrate 1. The dispenser 3, a liquid crystal 5
It has become the nozzle portion 3b provided perpendicularly to a lower end of the barrel portion 3a and the cylindrical barrel portion 3a which houses a
Air hose 4 is connected to the upper end of the barrel portion 3a.

[0004] Then, the supply of the liquid crystal 5 to the liquid crystal sealed region of the glass substrate 1, and carries the glass substrate 1 under the dispenser 3, is opposed substantially center of the liquid crystal sealing area on the nozzle portion 3b of the dispenser 3 , air hose 4 in this state
By supplying air from the barrel portion 3a of the dispenser 3,
It is carried out in a manner of dropping on the glass substrate 1 of the liquid crystal 5 of the barrel portion 3a in the air pressure from the nozzle 3b.

[0005]

[SUMMARY OF THE INVENTION] However, the liquid crystal supply method in the above conventional manufacturing method, since they are to be dropped on the glass substrate 1 by extruding the liquid crystal 5 of the dispenser 3 in air pressure, a certain amount of to provide a liquid crystal 5 to the glass substrate 1, it is necessary to strictly control the air pressure and the air supply time, thus to a troublesome control of the liquid crystal supply amount, also the liquid crystal remaining in the dispenser 3 is glass substrate 1
To decrease with the repetition of the supply of the liquid crystal 5 to,
Air pressure, and control the air supply amount constant, the change in the liquid crystal remaining in the dispenser 3, the supply amount of the liquid crystal 5 to the glass substrate 1 has fallen vary.

[0006] Therefore, the liquid crystal 5 is supplied, the thickness of the liquid crystal layer of the glass substrate after the assembled pair of LCD glass substrate (hereinafter, referred to as gap) accuracy depends on the supply amount of the accuracy of the liquid crystal 5 in the conventional manufacturing method with the characteristics, variations in the supply amount of the liquid crystal 5, there is a problem that it becomes a fluctuation of the gap value. The present invention has been made to solve the conventional such problems, a feature of variation in the gap of the liquid crystal display device supply amount of the liquid crystal to the glass substrate is assembled be varied is small it is an object to provide a method of manufacturing a liquid crystal display element having.

[0007]

In order to solve the above problems SUMMARY OF THE INVENTION In the method of manufacturing a liquid crystal display device of the present invention, the amount of liquid supplied onto the glass substrate accurately weighed, the gap value of interest in dividing by calculating the area of ​​the liquid crystal in the containment zone, whereas, the frame sealing material, the area of ​​containment zone of area the liquid crystal of the inner region when it is a gap value of the objective bonded pair of glass substrates it is characterized in being formed to be identical with.

[0008]

Method of manufacturing a liquid crystal display device of the effects of the present invention obtains the liquid crystal containment zone for the gap value of interest from the amount of liquid supplied onto the glass substrate, forming a frame-shaped sealing member accordingly it is obtained by way, even variations in the supply amount of the liquid crystal occurs, it is possible to obtain a liquid crystal display device which does not cause variations in the gap.

[0009]

BRIEF DESCRIPTION OF THE PREFERRED embodiment of the present invention with reference to the drawings. 1, reference numeral 1 is a glass substrate for a liquid crystal display device. This glass substrate 1 side, the electrode pattern and the alignment film for display made of ITO or the like (all not shown) are formed. Glass substrate 1 is placed on the stage 6 which can be weighed. The stage 6 has a temperature adjusting mechanism (not shown), it is kept substantially constant temperature of the glass substrate 1 on the stage. 3 is an air extrusion dispenser for supplying liquid onto the glass substrate 1. It is kept at the same temperature as the stage 6 by a temperature adjusting mechanism for the liquid crystal 5 are not shown in this dispenser 3. Further, 7 is a dispenser for applying the sealant 2 in a frame shape. These dispensers 3,7 is attached to the X-Y-Z robot respectively (not shown), the movement amount and the sealing member of the signal and the air pressure from the dispenser controller 8 X, Y, Z each direction , the discharge amount of liquid crystal is controlled. 9 is a computer for signal processing to process the signals from the stage 6, gives the command to the controller 8.

[0010] Next, the step 1 and 2
(A), it is described with reference to (b), (c). First, the glass substrate 1 is carried onto the stage 6, the weight is measured. Then, by the dispenser 3, a liquid crystal 5 is a predetermined amount dropped supplied over once or several times on the glass substrate 1 (FIG. 2 (a)). Dropping amount at this time is not required to be strictly controlled to a predetermined amount. When measured again by weight in this state, the weight difference between the glass substrate 1 was measured prior to dropping supplying the liquid crystal, the weight of the liquid crystal dripped supplied.

[0011] As described above, the the temperature of the glass substrate 1 and the liquid crystal 5 within the dispenser is maintained to be equal, the weight of the liquid crystal dripped supplied, the liquid crystal in the temperature at this that are known in advance the 'em is divided by the specific gravity, the liquid crystal of the volume of the dropped supply is required. The liquid crystal volume obtained, when the glass substrate is assembled bonded later, do it by dividing the value of the gap required purposes, the area of ​​extension of the liquid crystal when assembled is obtained. In the method of manufacturing a liquid crystal display device of the present invention, the series of processes are performed on the signal processing computer 9.

[0012] Next, a sealing material 2 photocurable by the dispenser 7 is not applied so as to surround the liquid crystal in a frame shape, in which, when the sealing material is crushed to a gap value of the objective, the area of ​​the region surrounded by the inside of the frame-shaped sealing material, to be equal to the area of ​​extension of the above-mentioned liquid crystal. For example, if it is calculated dropping amount supplied to the liquid crystal of the glass substrate 1 was 5% frequently than a predetermined amount, the inner area of ​​the frame-shaped sealing material when the frame-shaped sealing material is crushed to a gap value of the objective , a predetermined amount is calculated by the signal processing computer 9 so as to 5% greater relative to the inner area of ​​the frame-shaped sealing material is formed when dropped supplied, the instruction to the controller 8 of the dispenser based on the result may do it with a sealing material 2 is applied in a frame shape by a dispenser 7 with (Figure 2 (b)). Then, in this way the liquid crystal is dropped supplied, the glass substrate 10 on the opposite side was sprayed glass substrate 1 and the spacer sealing material is formed in a frame shape to face in a vacuum chamber and bonded (FIG. 2 (c )). Thereafter, by irradiating ultraviolet rays by masking the frame-shaped region other than the sealing material, to obtain a liquid crystal display element of the sealing material 2 is cured.

[0013]

Effects of the Invention The present invention, according to the amount of the liquid crystal which is supplied to the glass substrate as described above, to form a frame-shaped sealing member, even if variations in the amount of the liquid crystal occurs variation in gap value it can be obtained with less crystal display device. Therefore it is possible to make good yield a constant liquid crystal display device of the gap value.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is an explanatory view showing an embodiment of a method of manufacturing a liquid crystal display device of the present invention.

2 is a perspective view showing a step of the manufacturing method of the liquid crystal display device of the present invention.

3 is an explanatory view showing the prior art method of manufacturing a liquid crystal display device.

DESCRIPTION OF SYMBOLS

1 glass substrate 2 sealant 3 dispenser 4 hose 5 LCD 6 stage 7 Dispenser 8 Dispenser controller 9 signal processing computer 10 opposing the glass substrate

Claims (2)

[The claims]
1. 1. A method of fabricating a liquid crystal display device formed by sealing a liquid crystal between two glass substrates, after dropping a liquid crystal on at least one of the glass substrates facing, weighed the dropped liquid crystal, at least method of manufacturing a liquid crystal display element characterized by matching the sealing material is formed like a frame draw the area corresponding to the amount of liquid crystal described above weighed into the glass substrate of one, then bonding two of the glass substrate.
2. As claimed in claim 2 wherein the means for weighing the liquid crystal, after measuring the weight of the glass substrate, the weight of the glass substrate was dropped liquid crystal is measured, the two weight difference of the liquid crystal layer of said liquid crystal specific gravity and purpose It claims a method of manufacturing a liquid crystal display device of the first term, wherein applying a sealant according to the area of ​​the liquid crystal layer obtained by dividing the thickness.