JP2002258299A - Liquid crystal display manufacturing method, manufacturing device and liquid crystal display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit production at a stable tact independent of the design of a liquid crystal panel. SOLUTION: In the process in which a liquid crystal 7 is dropped in a specified pattern and quantity in the region encircled by a sealing compound 2, the accuracy of a drip dropping the liquid crystal 7 is better than 0.4% and the distance between the position to be delivered by the liquid crystal 7 and the surface of a substrate dropping the liquid crystal 7 ranges from 10 to 100 μm. In addition, the liquid crystal 7 is filled in a syringe 8 then pushing with a pulse motor 5 a piston 4 for the syringe 8 in as much as a designated quantity drops the liquid crystal 7. Pinpoint accuracy of the drip is thereby ensured and the drop time can be shortened. This permits keeping production higher in displaying the quality and all the more stable in tact. Referring to the merits of the pulse motor 5, mechanically pushing a piston as opposed to a pneumatic pressurization and extrusion exerts a less influence on the viscosity of a liquid crystal and the parameters under control can be determined simply by the number of pulses which is output to a motor resulting in an increased accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method and apparatus for manufacturing a liquid crystal display device which can be used as a display device of many electronic devices, and a liquid crystal display device.

[0002]

2. Description of the Related Art Conventionally, a vacuum injection method has been used as a method of manufacturing a liquid crystal panel. This vacuum injection method is a step of arranging and forming a spacer material for determining a gap of a liquid crystal panel on at least one of a pair of substrates with electrodes subjected to an alignment process, and at least one substrate,
A step of bonding and fixing a pair of substrates, forming a thermosetting sealing material for sealing the liquid crystal so as to have an injection port for injecting the liquid crystal, and performing alignment of the two substrates. After that, the steps of laminating the substrates and pressing the sealing material uniformly to have a predetermined gap, the step of thermally curing the sealing material, and the step of forming a liquid crystal cell by cleaving leaving only necessary terminal portions, Placing the liquid crystal cell and the liquid crystal in a vacuum chamber, reducing the pressure in the chamber and then contacting the liquid crystal cell with the liquid crystal; releasing the chamber to atmospheric pressure and filling the cell with the liquid crystal; It is characterized by including a step of forming a uniform cell gap by uniformly pressing the surface of the filled cell and extruding unnecessary liquid crystal, and a step of sealing the liquid crystal inlet with an ultraviolet curable resin. .

In this vacuum injection method, the filling of the liquid crystal into the cell utilizes the pushing up of the liquid crystal by the atmospheric pressure and the capillary phenomenon of the liquid crystal, and the size of the liquid crystal panel, the gap of the liquid crystal cell, the alignment of the liquid crystal. In addition, it is difficult to control production since the injection time greatly changes depending on the viscosity of the liquid crystal.

[0004]

As described above, in the conventional vacuum injection method, the time required for filling the liquid crystal is unstable, and it is difficult to control the production. In particular, in the future, if it is attempted to realize a design such as a large-screen liquid crystal panel and a multi-patterning pattern of small panels on a large-area substrate, it is necessary to increase the number of facilities for injecting liquid crystal.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a method and an apparatus for manufacturing a liquid crystal display device and a liquid crystal display device which can be manufactured with a stable tact regardless of the design of the liquid crystal panel. is there.

[0006]

According to a first aspect of the present invention, there is provided an apparatus for manufacturing a liquid crystal display device, comprising: Arranging a spacer material for determining a gap of the liquid crystal panel on at least one substrate, and forming an ultraviolet-curable sealing material for sealing the liquid crystal by bonding a pair of substrates to at least one substrate; A step of dropping a predetermined amount of liquid crystal in a predetermined pattern in a region surrounded by the sealing material, performing alignment of the pair of substrates, and forming a bonded liquid crystal panel under reduced pressure; A step of hardening the sealing material by irradiating ultraviolet rays with light shielding portions other than the sealing material of the liquid crystal panel, and a liquid crystal for stabilizing the orientation of the liquid crystal and eliminating bubbles in the liquid crystal panel. In NI point above the temperature and the step of performing a 1 hour or more thermal annealing, in a step of dropping the liquid crystal, dropping amount of accuracy of dropping the liquid crystal is 0.4%
Within this range, the distance from the liquid crystal discharge position to the substrate surface onto which the liquid crystal is dropped is in the range of 10 to 100 μm.

As described above, the method includes a step of dropping a predetermined amount of liquid crystal in a predetermined pattern in a region surrounded by the sealing material. In this step, the accuracy of the dropping amount of liquid crystal is within 0.4%. Since the distance from the liquid crystal discharge position to the substrate surface on which the liquid crystal is dropped is in the range of 10 to 100 μm,
Since the accuracy of the drop amount is high and the drop time can be shortened, production with high display quality and stable tact can be performed.
In addition, in the case of the dropping method, there is a risk that an alignment flaw is generated when the nozzle from which the liquid crystal is discharged comes into contact with the alignment-treated substrate. In order to avoid this danger, the distance between the nozzle and the substrate is set to 10 μm. With the above, alignment scratches can be prevented. Further, setting the distance between the nozzle and the substrate to 100 μm or less contributes to shortening of the dropping time. If the distance between the nozzle and the substrate is 100 μm or more, the possibility that the liquid crystal contacts the substrate is low. In addition, 0.4%, which is a standard for the accuracy of the amount of liquid crystal dropped, is ± 10% of the gap accuracy of the panel.
This is the precision required to make the thickness 0.1 μm or less. However, there is no strict rule for a piezoelectric element.

According to this manufacturing method, the tact time can be stabilized, and a method of manufacturing a liquid crystal display device having a high gap accuracy and a high yield can be provided.

According to a second aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the first aspect, wherein the liquid crystal is filled in a syringe and the piston of the syringe is pressed by a predetermined amount by a pulse motor to drop the liquid crystal. As described above, the liquid crystal is filled in the syringe, and the liquid crystal is dropped by pushing the piston of the syringe by a predetermined amount by the pulse motor, so that the accuracy of the drop amount can be improved. The merit of the pulse motor is that, unlike pressure extrusion by air, since the piston is mechanically pressed, the influence of the viscosity of the liquid crystal is small, so that the parameter to be controlled can be determined only by the number of pulses output to the motor. By rotating the motor by this number of pulses, the piston is pushed and liquid crystal corresponding to the volume change can be dropped on the substrate. Also, when increasing the number of syringes, it is effective because a plurality of pistons can be pushed by one pulse motor.

According to a third aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the second aspect, wherein the number and size of the syringes, and the number and pitch of the nozzles for discharging liquid crystal provided in the syringe can be adjusted. In this way, the number and size of the syringes, and the number and pitch of the nozzles for discharging liquid crystal provided in the syringe can be adjusted, so that even if a variety of design panels are arranged on one substrate, Can be dealt with by appropriately changing the inner diameter of the nozzle and adjusting the position of the nozzle.

According to a fourth aspect of the present invention, in the method of the third aspect, the tip of the nozzle is coated with a Teflon resin. In this way, the tip of the nozzle is coated with Teflon resin,
Even if the nozzle comes into contact with the substrate, no alignment flaw or the like occurs.

According to a fifth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the first aspect, wherein the liquid crystal is dropped using a liquid crystal discharging device provided with a piezoelectric element. As described above, the same effect can be obtained even when the liquid crystal is dropped using the liquid crystal discharge device provided with the piezoelectric element.

According to a sixth aspect of the present invention, there is provided an apparatus for manufacturing a liquid crystal display device, comprising: a stage for fixing at least one of a pair of substrates provided with electrodes on which a sealing material has been formed, by vacuum suction; A dropping unit for dropping liquid crystal onto the substrate surface, wherein the dropping unit is connected to the syringe filled with liquid crystal, a pulse motor for controlling movement of a piston of the syringe, and is connected to the syringe to discharge liquid crystal. And a nozzle.

As described above, since the dropping unit has the syringe filled with the liquid crystal, the pulse motor for controlling the movement of the piston of the syringe, and the nozzle connected to the syringe for discharging the liquid crystal, the dropping amount is controlled. Therefore, the accuracy can be improved by mechanically pressing the piston with a pulse motor.

The advantage of this pulse motor is that, unlike pressure extrusion by air, since the piston is mechanically pushed, the influence of the viscosity of the liquid crystal is small, so that the parameter to be controlled can be determined only by the number of pulses output to the motor. Is a point. By rotating the motor by this number of pulses, the piston is pushed and liquid crystal corresponding to the volume change can be dropped on the substrate. Also, when increasing the number of syringes, it is effective because a plurality of pistons can be pushed by one pulse motor.

If the rotation amount is constant, the amount of dripping changes in proportion to the inner diameter of the syringe. To control the amount of dripping in a minute panel, the inner diameter of the syringe and the amount of rotation of the pulse motor are controlled. (Pulse number) can be controlled accurately.

According to a seventh aspect of the present invention, there is provided a liquid crystal display device manufacturing apparatus according to the sixth aspect, which has a function of adjusting the number and size of syringes, and the number and pitch of nozzles. As described above, the number of syringes, the size, and the function of adjusting the number and pitch of the nozzles are provided, so that even when panels of various designs are arranged in one substrate, the inner diameter of the syringe can be appropriately adjusted. This can be dealt with by changing the nozzle position and adjusting the position of the nozzle.

According to an eighth aspect of the present invention, in the apparatus for manufacturing a liquid crystal display according to the sixth or seventh aspect, the tip of the nozzle is coated with Teflon resin. Thus, since the tip of the nozzle is coated with Teflon resin, even if the nozzle comes into contact with the substrate, alignment flaws and the like hardly occur.

According to a ninth aspect of the present invention, there is provided an apparatus for manufacturing a liquid crystal display device, comprising: a stage for fixing at least one substrate on which a sealing material is formed among a pair of substrates with electrodes subjected to an alignment treatment by vacuum suction; And a drop unit for dropping liquid crystal onto the substrate surface, and the drop unit had a function of dropping liquid crystal using a liquid crystal discharge device provided with a piezoelectric element. As described above, the same effect can be obtained even if the dropping unit has a function of dropping liquid crystal using a liquid crystal discharge device provided with a piezoelectric element.

According to a tenth aspect of the present invention, a liquid crystal display device is formed by using the method of manufacturing a liquid crystal display device according to the first, second, third, fourth, or fifth aspect. Thus, claims 1, 2, 3, 4
Alternatively, since the liquid crystal display device is formed by using the method of manufacturing a liquid crystal display device described in 5, the liquid crystal display device with excellent display quality in which ring-shaped uneven dripping marks are inconspicuous in a display state can be provided.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic view of a liquid crystal dropping device according to an embodiment of the present invention.

As shown in FIG. 1, a substrate 1 with an electrode, on which a sealing material 2 is formed and which has been subjected to an orientation treatment, is placed on a stage 1 movable vertically and horizontally, and the stage 1 and the substrate 3 are fixed by vacuum suction. Above the stage 1, there is a dripping unit. The dripping unit includes a syringe 8 filled with liquid crystal 7, a pulse motor 5 for controlling the movement of the piston 4, a bar 6 for transmitting the rotation of the pulse motor 5 to the piston 4, and a syringe holder for fixing the syringe 8. 9
And a nozzle 10 connected to the syringe 8 for discharging the liquid crystal 7
, A Teflon tube 11 connecting the syringe 8 and the nozzle 10, and a drip head 12 having the nozzle 10 disposed therein. In addition, the number of syringes 8, size,
And a function of adjusting the number and pitch of the nozzles 10. The tip of the nozzle 10 is coated with Teflon resin.

Next, a method of manufacturing a liquid crystal display device by actually dropping liquid crystal will be described. That is, in this method of manufacturing a liquid crystal display device, a step of arranging a spacer material for determining a gap of the liquid crystal panel on at least one of the pair of electrodes-attached substrates 3 constituting the liquid crystal panel. And at least one of the substrates 3
(Meta) for bonding the pair of substrates 3 to seal the liquid crystal
A step of forming an acrylate-based or epoxy-based ultraviolet-curable sealing material 2, a step of dropping a predetermined amount of liquid crystal 7 in a predetermined pattern in a region surrounded by the sealing material 2,
A step of aligning the pair of substrates 3 and forming a bonded liquid crystal panel under a reduced pressure of 0.8 torr or less, and shielding the liquid crystal panel other than the sealing material 2 from light and irradiating ultraviolet rays to the sealing material. And a step of performing thermal annealing for one hour or more at a temperature equal to or higher than the NI point of the liquid crystal 7 in order to stabilize the orientation of the liquid crystal 7 and eliminate bubbles in the liquid crystal panel.

In the liquid crystal dropping step, the liquid crystal 7 is filled in a syringe 8 and the piston 4 of the syringe 8 is pushed by a pulse motor 5 by a predetermined amount to drop the liquid crystal 7. LCD 7
The accuracy of the drop amount of the liquid crystal 7 is within 0.4%, the time of dropping the liquid crystal 7 is within 3 minutes, and the distance between the liquid crystal 7 and the substrate surface where the liquid crystal 7 is dropped from the tip of the nozzle which is the discharge position of the liquid crystal 7 is 10
To 100 μm. In this case, the stage 1 moves upward so that the distance between the nozzle 10 and the substrate 3 is within 10 to 100 μm. Next, the pulse motor 5 rotates by a predetermined number of pulses and pushes the piston 4. At this time, the liquid crystal 7 in the syringe 8 changes by the volume of the changed nozzle 10
Is dropped onto the substrate 3. Then, the stage 1 moves downward and moves parallel to the next point.

Here, the relationship between the pulse motor used this time and the stroke amount for pushing the piston is 10 μm per pulse.
It is. FIG. 2 is a graph showing the relationship between the drop amount of the liquid crystal and the inner diameter of the syringe changed to 0.1, 0.5, 1.5 mm when the pulse motor is rotated for 10 pulses.

As can be seen from this graph, if the rotation amount is constant, the drop amount changes in proportion to the inner diameter size of the syringe. Therefore, in order to control the minute amount of dripping in the panel, it is possible to precisely control the inner diameter size of the syringe and the rotation amount (number of pulses) of the pulse motor.

Here, a 13 inch XGA specification T
An FT panel was prototyped by a dripping method. The amount of liquid crystal in this panel is 240 mm long × 310 mm wide × cell gap 5μ.
m = 372 ml. Here, the dripping pattern is shown in FIG.
4 were performed. At this time, FIG. 3 shows a dripping pattern A, and FIG. Dropping pattern A
Then, the amount of one drop is 372ml ÷ (24 points x 60 points)
= 0.258 ml, 372 ml for dropping pattern B
(46 points × 60 points) = 0.135 ml. In the dropping pattern A, the vertical pitch is 9 mm, the horizontal pitch is 4.65 mm, and the position of the dropping point at one corner is 17.8 mm from the sealing material 2 in the vertical direction and 16.5 mm in the horizontal direction.
mm, and in the dropping pattern B, the pitch in the vertical direction is 5.
0 mm, the horizontal pitch is 5.0 mm, the position of the dripping point at one corner is 5.0 mm in the vertical direction, and the distance from the sealing material 2 is 5.0 mm.
The horizontal direction is 5.0 mm.

Therefore, in the dropping pattern A, φ1.0 mm
If 33 pulses are applied to the pulse motor using the syringe, the drop amount is (33 pulses × 0.00785 ml) ×
(24 points x 60 points) = 372 ml with 373.032 ml
It is within the range of ± 0.4%. Next, in the dropping pattern B, (17 pulses × 0.00785 ml) × (46 points ×
60 points) + (17 pulses x 0.0019625 ml) x
(2 points × 60 points) = 372.3 ml, which is also 3 in this case.
It is in the range of 72 ml ± 0.4%. Here, in the dropping pattern B, dropping is performed with a syringe having a diameter of 1.0 mm in the first step, and dropping is performed in a row at the upper and lower ends of the drawing with a syringe having a diameter of 0.5 mm in the second step. Can be. Here, Table 1 shows the drop pattern and the display quality.

[0029]

[Table 1]

From this result, in the dropping pattern A, since the distance from the seal to the dropping point was as long as 16.5 mm, bubbles in the panel corner could not be eliminated. No in-plane unevenness occurred because the pitch of the dropping points was within 10 mm.

In this case, the liquid crystal was dropped by connecting one syringe to two nozzles. Twelve syringes were arranged in a dropping pattern A and 23 syringes were arranged in a dropping pattern B. In the dropping pattern B, one syringe was separately prepared and connected to two nozzles in the same manner as 2nd dropping. In addition, in the dropping pattern A, it takes one second to drop one point, so that one second × 60 points is completed in one minute. In addition, in the dropping pattern B, it is completed in 2 minutes. If the dropping time exceeds 3 minutes, ring-shaped unevenness occurs at the dropping point when a voltage is applied, deteriorating the display quality.

As shown in FIG. 5, a panel (7.8 type, 13 type) 2 having a plurality of patterns in one substrate 3 is provided.
Even when 0 and 21 are designed, if the drop pitch and the pitch between the panels 20 and 21 are designed to be consistent, the production of a plurality of panels can be performed simultaneously by one apparatus by adjusting the size and number of syringes. This makes it possible to reduce production loss.

Note that the dropping unit may have a function of dropping liquid crystal using a liquid crystal discharge device provided with a piezoelectric element.

[0034]

According to the method for manufacturing a liquid crystal display device according to the first aspect of the present invention, the method includes a step of dropping a predetermined amount of liquid crystal in a predetermined pattern in a region surrounded by the sealing material. , The accuracy of the amount of liquid crystal dropped is 0.4
%, The distance from the liquid crystal discharge position to the substrate surface where the liquid crystal is dropped is in the range of 10 to 100 μm, so that the accuracy of the drop amount is high and the drop time can be shortened, so that the display quality is high and the tact time is stable Production at the factory. Also,
In the case of the dropping method, there is a risk that an alignment flaw may occur due to the nozzle from which the liquid crystal is discharged coming into contact with the alignment-treated substrate. This can prevent alignment flaws. Further, setting the distance between the nozzle and the substrate to 100 μm or less contributes to shortening of the dropping time. The liquid crystal panel created in this way has a high display quality, and it is possible to arrange multiple pattern panels on one substrate.There is no production loss and it can be produced under stable tact, so production management is also possible. It will be easier.

According to the second aspect, the liquid crystal is filled in the syringe, and the liquid crystal is dropped by pushing the piston of the syringe by a predetermined amount by the pulse motor, so that the accuracy of the drop amount can be improved. The merit of the pulse motor is that, unlike pressure extrusion by air, since the piston is mechanically pressed, the influence of the viscosity of the liquid crystal is small, so that the parameter to be controlled can be determined only by the number of pulses output to the motor. By rotating the motor by this number of pulses, the piston is pushed and liquid crystal corresponding to the volume change can be dropped on the substrate. Also, when increasing the number of syringes, it is effective because a plurality of pistons can be pushed by one pulse motor.

In the third aspect, the number of syringes, the size,
In addition, since the number and pitch of the nozzles for ejecting liquid crystal provided in the syringe can be adjusted, even when panels of various designs are arranged on one substrate, the inner diameter of the syringe is appropriately changed and the position of the nozzle is changed. Can be dealt with by adjusting.

In the fourth aspect, since the tip of the nozzle is coated with Teflon resin, even if the nozzle comes into contact with the substrate, no alignment flaw or the like occurs.

According to the fifth aspect, the same effect can be obtained by dropping liquid crystal using a liquid crystal discharge device provided with a piezoelectric element.

According to the apparatus for manufacturing a liquid crystal display device of the present invention, the dropping unit includes a syringe filled with liquid crystal, a pulse motor for controlling movement of a piston of the syringe, and a liquid crystal connected to the syringe. And a nozzle for discharging the liquid droplets, so that the accuracy can be improved by mechanically pressing the piston with a pulse motor in order to control the drop amount.

The advantage of this pulse motor is that, unlike pressure extrusion by air, since the piston is mechanically pushed, the influence of the viscosity of the liquid crystal is small, so that the parameter to be controlled can be determined only by the number of pulses output to the motor. Is a point. By rotating the motor by this number of pulses, the piston is pushed and liquid crystal corresponding to the volume change can be dropped on the substrate. Also, when increasing the number of syringes, it is effective because a plurality of pistons can be pushed by one pulse motor.

If the amount of rotation is constant, the amount of dripping changes in proportion to the inner diameter of the syringe. To control the amount of dripping in a minute panel, the inner diameter of the syringe and the amount of rotation of the pulse motor can be controlled. (Pulse number) can be controlled accurately.

According to the seventh aspect, the number of syringes, the size,
And the function of adjusting the number and pitch of nozzles, so that even if panels of various designs are arranged on one substrate, the inner diameter of the syringe is appropriately changed and the position of the nozzles is adjusted. Can be dealt with.

In the eighth aspect, since the tip portion of the nozzle is coated with Teflon resin, even if the nozzle comes into contact with the substrate, alignment flaws and the like hardly occur.

According to the liquid crystal display device manufacturing apparatus of the ninth aspect of the present invention, the same effect can be obtained even if the dropping unit has a function of dropping liquid crystal using a liquid crystal discharging device provided with a piezoelectric element. Is obtained.

According to the liquid crystal display device of the tenth aspect of the present invention, since the liquid crystal display device is formed by using the method of manufacturing the liquid crystal display device of the first, second, third, fourth or fifth aspect, the display state has a ring-shaped unevenness. A liquid crystal display device with excellent display quality, in which dripping marks are not noticeable, can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a liquid crystal dropping device according to an embodiment of the present invention.

FIG. 2 is a graph showing a relationship between an inner diameter of a drip syringe and a drop amount according to the embodiment of the present invention;

FIG. 3 shows a drop pattern A according to the embodiment of the present invention.
Illustration of

FIG. 4 is a drop pattern B according to the embodiment of the present invention.
Illustration of

FIG. 5 is a schematic view of a substrate on which a plurality of panel patterns are arranged according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stage 2 Sealing material 3 Oriented substrate with electrode 4 Piston 5 Pulse motor 6 Bar 7 Liquid crystal 8 Syringe 9 Syringe holder 10 Nozzle 11 Teflon tube

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideki Matsukawa 1006 Kazuma, Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. F-term (reference)

Claims (10)

[Claims] 1. A step of arranging a spacer material for determining a gap of a liquid crystal panel on at least one of a pair of substrates with electrodes which has been subjected to an alignment treatment and constituting a liquid crystal panel; Forming a UV-curable sealing material for sealing a liquid crystal by bonding a pair of substrates, and dropping a predetermined amount of liquid crystal in a predetermined pattern in a region surrounded by the sealing material; Performing the alignment of the pair of substrates, forming a bonded liquid crystal panel under reduced pressure, and shielding the portion of the liquid crystal panel other than the sealing material, and curing the sealing material by irradiating ultraviolet rays, In order to stabilize the orientation of the liquid crystal and eliminate bubbles in the liquid crystal panel, one
Performing a thermal anneal for at least one hour, wherein in the step of dropping the liquid crystal, the accuracy of the drop amount of the liquid crystal is within 0.4%, and the distance from the discharge position of the liquid crystal to the substrate surface where the liquid crystal is dropped. Is in the range of 10 to 100 μm. 2. A method for manufacturing a liquid crystal display device according to claim 1, wherein the liquid crystal is filled in a syringe, and the liquid crystal is dropped by pushing a predetermined amount of a piston of the syringe with a pulse motor. 3. The method for manufacturing a liquid crystal display device according to claim 2, wherein the number and size of the syringes and the number and pitch of nozzles for discharging liquid crystal provided in the syringes can be adjusted. 4. The method according to claim 3, wherein a tip portion of the nozzle is coated with Teflon (registered trademark) resin. 5. The method for manufacturing a liquid crystal display device according to claim 1, wherein the liquid crystal is dropped using a liquid crystal discharge device provided with a piezoelectric element. 6. A stage for fixing at least one substrate on which a sealing material has been formed among a pair of substrates with electrodes subjected to an alignment treatment by vacuum suction, and a drop disposed above the stage to drop liquid crystal onto the substrate surface. With a unit,
The dropping unit is a syringe filled with liquid crystal, a pulse motor for controlling the movement of the piston of the syringe,
An apparatus for manufacturing a liquid crystal display device, comprising: a nozzle connected to the syringe for discharging liquid crystal. 7. An apparatus for manufacturing a liquid crystal display device according to claim 6, wherein said apparatus has a function of adjusting the number and size of syringes and the number and pitch of nozzles. 8. The apparatus for manufacturing a liquid crystal display device according to claim 6, wherein a tip portion of the nozzle is coated with Teflon resin. 9. A stage for fixing at least one substrate on which a sealing material is formed among a pair of substrates with electrodes subjected to an alignment treatment by vacuum suction, and a drop disposed above the stage to drop liquid crystal onto the substrate surface. With a unit,
An apparatus for manufacturing a liquid crystal display device, wherein the dropping unit has a function of dropping liquid crystal using a liquid crystal discharge device provided with a piezoelectric element. 10. A liquid crystal display device formed by using the method for manufacturing a liquid crystal display device according to claim 1, 2, 3, 4, or 5.