JP2002090761A - Method for manufacturing liquid crystal display liquid crystal injecting tool and vessel for scattering liquid crystal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a liquid crystal display element capable of forming a liquid crystal layer which has uniform thickness and in which no bubble remains and simultaneously performing a stage corresponding to a conventional spacer scattering stage and a liquid crystal dropping stage favorably. SOLUTION: A liquid crystal injecting tool 10 having plural through-holes 14 formed thereon is prepared and prescribed quantity of a liquid crystal 12 and a spacer 28 are exuded from the through-holes to drop them onto one surface of a substrate in the condition that the liquid crystal 12 and the spacer 28 whose sizes are made even are mixed with each other. The hole sizes of the through-holes are made uniform and the liquid crystal in the vicinity of each through-hole is uniformly pressed by a pressing means so that the liquid crystal is uniformly exuded from each through-hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display element, a liquid crystal injecting device, and a container for spraying liquid crystal.

[0002]

2. Description of the Related Art Heretofore, as a liquid crystal sealing method in manufacturing a liquid crystal display element, for example, an injection method described below has been used.

[0003] That is, a sealant is provided on one glass substrate, and the other opposing glass substrate is bonded. At this time, for example, a liquid crystal injection port is provided at one end of the sealant. Next, in a state where the liquid crystal injection port is in contact with the liquid crystal in the liquid crystal reservoir under vacuum, the liquid crystal is injected and filled from the liquid crystal injection port by returning to reduced pressure or normal pressure, and then the liquid crystal injection port is filled with an adhesive or the like. Seal it.

[0004] However, this method has the following various problems.

[0005] That is, a step of applying a vacuum and a step of sealing the liquid crystal injection port are required, and thus the steps are complicated and troublesome. Further, since the liquid crystal is injected by immersing the substrate in the liquid crystal reservoir, expensive liquid crystal is wasted several times as much as the required injection amount.
Further, in the case of a substrate having a large area, it takes a long time to inject, so that the production efficiency is poor. Further, bubbles are easily generated when the liquid crystal injection port is sealed, and therefore, it is necessary to perform detailed management in production technology.

In order to solve these problems, the following dropping method has been developed and various proposals have been made.

According to the method of manufacturing a liquid crystal display device disclosed in Japanese Patent Application Laid-Open No. 63-179323, the liquid crystal is sealed by the following steps. That is, while dispersing the spacer on one of the pair of opposing substrates,
Form sealant. Next, a required amount of liquid crystal is dropped inside the sealant. Then, the other opposing substrates are superimposed, and are bonded in a vacuum or reduced pressure. afterwards,
The sealing agent is cured to complete the encapsulation.

According to this method, the process is simplified because a liquid crystal injection port is not required, and only a required amount of liquid crystal needs to be dropped. Further, the required injection time is shorter than in the injection method. .

Further, according to the method of manufacturing a liquid crystal display device disclosed in Japanese Patent Application Laid-Open No. 56-155920, after the substrates are overlapped in the above-described method and before the pressure is applied, the sealing is performed by irradiating ultraviolet rays. Allow the agent to cure. At this time, a liquid crystal outlet is formed by applying a mask to a part of the sealant so that ultraviolet rays are not irradiated. The liquid crystal discharge port may be formed by forming a sealant having a space corresponding to the liquid crystal discharge port in advance when forming the sealant. Then, excess liquid crystal is discharged from the liquid crystal discharge port when the substrate is pressed. This crimping is performed under normal pressure. Thereafter, the liquid crystal layer is completely sealed by irradiating ultraviolet rays to the sealant at the liquid crystal outlet, thereby completing the encapsulation.

According to this method, only a required amount of liquid crystal needs to be dropped, and the time required for injection is reduced as compared with the injection method. Further, since there is no need to apply a vacuum, the process is simplified.

[0011]

However, the above-mentioned dropping method also has the following problems.

That is, bubbles may remain in the liquid crystal layer due to a slight difference in the degree of spread of the liquid crystal during compression. That is, the substrate interval of the liquid crystal display device is several μm,
The required amount of liquid crystal is about several hundreds of mg, but the amount of dripping is about the required amount, so that the liquid crystal may flow out at the time of pressure bonding and a gap may be formed between the substrate and the liquid crystal layer. Also,
Since the liquid crystal is inactive or the viscosity of the liquid crystal itself is high with respect to the polyimide alignment film that needs to be formed on the substrate surface, the liquid crystal does not spread uniformly even when the substrate is pressed, and therefore, depending on the position of the substrate. The thickness of the liquid crystal layer becomes uneven, and as a result, bubbles may remain.

On the other hand, Japanese Unexamined Patent Application Publication No.
No. 23 also discloses a method of dropping a wide range of dots on a substrate, but does not disclose a method of dropping a required amount of liquid crystal uniformly over the entire surface of the substrate.

Further, according to the liquid crystal filling device disclosed in Japanese Patent Application Laid-Open No. Sho 62-15520, a means for heating the liquid crystal is provided.
The liquid crystal can be spread uniformly.

However, if this device is used, it is necessary to provide a means for heating the liquid crystal, so that the configuration of the device becomes complicated. If a liquid crystal display device is manufactured using this device, a separate heating step is required.

Furthermore, in the above method, a step of dispersing the spacer and a step of dropping the liquid crystal are required separately, and a large number of steps are required. Conventionally, as a method of providing the spacer, there are a wet method in which the spacer is dispersed in a low-boiling-point solvent and the organic solvent is sprayed after spraying the spacer dispersion, and a dry method in which the spacer is dispersed by an air current.

The present invention has been made in view of these problems, and an object of the present invention is to provide a liquid crystal display capable of forming a liquid crystal layer having a uniform film thickness and free of air bubbles. An object of the present invention is to provide a device manufacturing method.

It is another object of the present invention to provide a method for manufacturing a liquid crystal display element, which can simultaneously perform a conventional spacer dispersing step and a step corresponding to a liquid crystal dropping step.

Still another object of the present invention is to provide a liquid crystal injection device suitable for use in manufacturing the above-mentioned liquid crystal display device.

Still another object of the present invention is to provide a container for spraying liquid crystal which is suitable for use in manufacturing the above-mentioned liquid crystal display device.

[0021]

According to a first aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, the method comprising: providing a liquid crystal layer on a substrate; A liquid crystal injection device having a through-hole formed therein is prepared, and a predetermined amount of liquid crystal is oozed out of the through-hole to drop the liquid crystal onto one surface of the substrate (referred to as a first substrate surface). It is characterized by including.

With this configuration, the liquid crystal can be uniformly dropped on the first substrate surface over a predetermined range. Therefore, in the subsequent crimping process,
As a result, a liquid crystal layer having a uniform thickness and having no air bubbles can be formed.
In addition, if the liquid crystal injection device is filled with the necessary amount of liquid crystal to form the liquid crystal layer, the liquid crystal can be simultaneously oozed out from the plurality of through-holes and dropped. It can be carried out. Here, the amount of liquid crystal to be exuded is an amount of liquid crystal necessary for forming a liquid crystal layer (also referred to as a predetermined amount). Further, in order to form the liquid crystal layer as a liquid crystal layer having a uniform thickness and no bubbles,
Normally, design liquid crystal dropping conditions such as the amount of liquid crystal dropped, the dropping speed, and the dropping range are determined. In consideration of the liquid crystal dropping conditions, the hole diameter, shape, number, interval, the range in which the liquid crystal injection device has the through holes, and the like are set.

According to the method of manufacturing a liquid crystal display device according to the second aspect of the invention, when manufacturing a liquid crystal display device by providing a liquid crystal layer on a substrate, a liquid crystal injection device having a plurality of through holes is prepared. Then, in a state where the liquid crystal and the spacers having the same size are mixed, a predetermined amount of the liquid crystal and the spacer are oozed out of the through hole, and the liquid crystal is formed on one surface of the substrate (referred to as a first substrate surface). And a preparatory step for forming a liquid crystal layer in which a liquid crystal layer and a spacer are dropped.

With this configuration, the liquid crystal and the spacer can be uniformly dropped on the first substrate surface over a predetermined range. Therefore, in the subsequent pressure bonding step, the liquid crystal is uniformly spread, and as a result, a liquid crystal layer having a uniform film thickness and free of bubbles can be formed. At the same time, the spacers also spread uniformly, and as a result, a liquid crystal display device having a uniform substrate spacing can be manufactured. Also, by filling the necessary amount of liquid crystal and the necessary amount of spacers to form the liquid crystal layer in the liquid crystal injection device,
Since the liquid crystal and the spacer can be simultaneously exuded and dropped from the plurality of through holes, the dropping can be performed easily and quickly. Here, the amount of the liquid crystal and the amount of the spacer to be exuded is the sum of the amount of the liquid crystal necessary for forming the liquid crystal layer and the amount of the necessary spacer (also referred to as a predetermined amount). Further, in order to form the liquid crystal layer as a liquid crystal layer having a uniform thickness and no air bubbles remain, and to provide a spacer distribution state capable of maintaining a uniform inter-substrate distance, usually, the liquid crystal and the spacers are arranged in a uniform manner. The design liquid crystal and spacer drop conditions such as the drop amount, drop speed, and drop range are determined. In consideration of the conditions for dropping the liquid crystal and the spacer, the hole diameter, shape, number, interval, the range in which the through hole is provided in the liquid crystal injection device, and the like are set.

Further, since the liquid crystal and the spacer are dropped in a mixed state, the dispersion of the spacer and the
It is not necessary to perform the dropping of the liquid crystal in a separate step, and therefore, it can be performed in a single step, and the step can be simplified.

According to the method of manufacturing a liquid crystal display device according to the third aspect of the invention, when manufacturing a liquid crystal display device by providing a liquid crystal layer on a substrate, the first liquid crystal film having a uniform thickness is provided.
Prepare a transfer plate and a second transfer plate to which a number of spacers of the same size are attached, and transfer the liquid crystal film to the side of the second transfer plate to which the spacers are attached, A liquid crystal layer forming preliminary step of transferring the transferred liquid crystal film and spacer onto one surface of the substrate (referred to as a first substrate surface) is included.

With this configuration, the liquid crystal and the spacer can be uniformly transferred over a predetermined range on the first substrate surface. Therefore, in the subsequent pressure bonding step, the liquid crystal is uniformly spread, and as a result, a liquid crystal layer having a uniform film thickness and free of bubbles can be formed. At the same time, the spacers also spread uniformly, and as a result, a liquid crystal display device having a uniform substrate spacing can be manufactured. Here, formation of a liquid crystal layer having a uniform thickness on the first transfer plate,
The attachment of the spacer to the second transfer plate may be performed by any suitable method.

Further, since the liquid crystal and the spacer are transferred by these series of transfer steps, it is not necessary to perform the dispersion of the spacer and the dropping of the liquid crystal in a separate step as in the related art. And the process can be simplified.

According to the method of manufacturing a liquid crystal display device according to the fourth aspect of the invention, when manufacturing a liquid crystal display element by providing a liquid crystal layer on a substrate, a liquid crystal spray container having a spray opening formed therein is prepared. And a preliminary step of forming a liquid crystal layer by spraying a predetermined amount of liquid crystal from a spray opening onto one surface (first substrate surface) of the substrate.

With such a configuration, the liquid crystal can be uniformly spread over a predetermined range on the first substrate surface. Therefore, the liquid crystal spreads uniformly in the subsequent pressure bonding step, and as a result, a liquid crystal layer having a uniform film thickness and free of bubbles can be formed. Further, if the liquid crystal scattering container is filled with an amount of liquid crystal necessary for forming the liquid crystal layer, the liquid crystal can be sprayed from the spray opening, so that spraying can be performed easily and quickly. Here, the amount of liquid crystal to be scattered means the amount of liquid crystal necessary for forming a liquid crystal layer (also referred to as a predetermined amount). Further, in order to form the liquid crystal layer as a liquid crystal layer having a uniform film thickness and having no air bubbles remaining, design spray conditions of the liquid crystal such as a spray amount, a spray speed and a spray range of the liquid crystal are usually determined. The diameter and shape of the spray port are set in consideration of the conditions for spraying the liquid crystal.

According to the method of manufacturing a liquid crystal display device according to the fifth aspect of the invention, when manufacturing a liquid crystal display device by providing a liquid crystal layer on a substrate, a liquid crystal spray container having a spray opening formed therein is prepared. In a state where the liquid crystal and the spacers having the same size are mixed, a predetermined amount of the liquid crystal and the spacer are sprayed from the spray port onto one surface of the substrate (referred to as the first substrate surface). It is characterized by including a step.

With such a configuration, the liquid crystal and the spacer can be uniformly spread over a predetermined range on the first substrate surface. Therefore, the liquid crystal spreads uniformly in the subsequent pressure bonding step, and as a result, a liquid crystal layer having a uniform film thickness and free of bubbles can be formed. At the same time, the spacers also spread uniformly, and as a result, a liquid crystal display device having a uniform substrate spacing can be manufactured. In addition, if the container for liquid crystal spraying is filled with the necessary amount of liquid crystal and the necessary amount of spacers to form the liquid crystal layer, the liquid crystal and the spacers can be sprayed from the spraying port, so that it is easy and quick. Can be sprayed. Here, the amount of liquid crystal and spacers to be scattered is the sum of the amount of liquid crystal necessary for forming the liquid crystal layer and the amount of spacer required (also referred to as a predetermined amount). Further, in order to form the liquid crystal layer as a liquid crystal layer having a uniform thickness and no air bubbles remain, and to provide a spacer distribution state capable of maintaining a uniform inter-substrate distance, usually, the liquid crystal and the spacers are arranged in a uniform manner. The spraying conditions of the liquid crystal and the spacer in design, such as the spraying amount, the spraying speed and the spraying range, are determined. The diameter and shape of the spray port are set in consideration of the spray conditions of the liquid crystal and the spacer.

Further, since the liquid crystal and the spacer are sprayed in a mixed state, it is not necessary to perform the spraying of the spacer and the dropping of the liquid crystal in a separate step as in the conventional case. And the process can be simplified.

According to the liquid crystal display element manufacturing method of the sixth aspect of the present invention, when manufacturing a liquid crystal display element by providing a liquid crystal layer on a substrate, a spraying container having a spray opening formed therein is prepared. And a preliminary step of forming a liquid crystal layer by spraying a predetermined amount of liquid crystal and the spacer from the spray port onto one surface (first substrate surface) of the substrate in a state where the liquid crystal is coated on the spacer in advance. .

With such a configuration, the same operation and effect as the fifth invention can be obtained. Further, since the liquid crystal is coated on the spacer, it is not necessary to maintain the state where the liquid crystal and the spacer are mixed as in the fifth invention. Further, at the time of spraying, since the mixed state of the liquid crystal and the spacer is always uniform, the liquid crystal and the spacer can be more uniformly sprayed. Here, the liquid crystal may be coated on the spacer by any suitable method.

In carrying out the first to sixth inventions, it is preferable to have the following steps (these steps are collectively referred to as a first method). (A-1) A step of providing a sealant around the first substrate surface before the liquid crystal layer formation preliminary step (hereinafter, also referred to as a sealant formation step). (B-1) The preliminary step of forming a liquid crystal layer is performed on a region inside the sealant on the first substrate surface. (C-1) After the liquid crystal layer formation preliminary step, the substrate and the substrate facing the substrate (referred to as a counter substrate) are in a state where the first substrate surface is inside, and at least both substrates Are superimposed in a state where the inside of them is kept in a vacuum, and then pressed while maintaining the state (hereinafter, also referred to as an overlapping step and a pressing step). (D-1) A step of curing the sealant after the pressing step (hereinafter, also referred to as a curing step).

According to the first method, the liquid crystal layer forming preliminary step (b-1) is performed on a region inside the sealant with respect to the substrate provided with the sealant. Therefore, (c-1)
In the pressing step, the liquid crystal is sealed in the space formed by the two substrates and the sealant, but it is also possible to take a step of putting extra liquid crystal out of a sealing hole provided in advance. By the first method, the liquid crystal is completely sealed, and a liquid crystal layer having a predetermined thickness can be formed.

Further, by performing the superposing step and the pressing step (c-1) in a vacuum, it is possible to further eliminate the residual bubbles in the liquid crystal layer. Here, the vacuum means a state in a space filled with a gas having a pressure lower than the normal atmospheric pressure. Therefore, when considered on the basis of the atmospheric pressure, it can be said that the pressure is a reduced pressure.

In carrying out the first to sixth inventions, it is preferable to have the following steps (these steps are collectively referred to as a second method). (A-2) a step of providing a sealant on a peripheral portion on one surface (first opposing substrate surface) of a substrate facing the substrate (opposing substrate) before the liquid crystal layer forming preliminary step ( Hereinafter, also referred to as a sealant forming step). (B-2) The preliminary step of forming a liquid crystal layer is performed on a region inside the portion in contact with the sealant in the subsequent overlapping step on the first substrate surface. (C-2) After the liquid crystal layer formation preliminary step, the substrate and the opposing substrate are placed in a state where the first substrate surface and the first opposing substrate surface are inside, and at least the inside of both substrates is evacuated. A step of superimposing while maintaining the state, and then pressing while maintaining the state (hereinafter, also referred to as an overlapping step and a pressing step). (D-2) A step of curing the sealant after the pressing step (hereinafter also referred to as a curing step).

According to the second method, the liquid crystal layer forming preliminary step (b-2) is performed not on the opposite substrate provided with the sealant but on the above-described substrate. This is performed in a region inside the portion in contact with the sealant in the overlapping step. Therefore, in the pressing step (c-2),
The liquid crystal is hermetically sealed by the space formed by the two substrates and the sealant, but it is also possible to take a step of taking out excess liquid crystal from a sealing hole provided in advance. Second
By the method described above, the liquid crystal is completely sealed, and a liquid crystal layer having a predetermined thickness can be formed.

In carrying out the fourth invention, it is preferable that the liquid crystal to be sprayed is formed into a particle shape in a state where the liquid crystal is solidified or has a high viscosity in advance.

Here, the particle shape is a shape suitable for spraying, and means, for example, a raindrop shape, a powder shape, a spherical shape, and other shapes. Further, a shape suitable for the above-mentioned spraying is determined depending on at least one of the pressure, the viscosity of the liquid crystal, and the shape and size of the spraying port.

With such a configuration, (c−
Also in the overlapping step and the pressing step in 1) or (c-2), since the viscosity of the liquid crystal is high, the risk of contact with the sealant is reduced.

In practicing the fourth or sixth invention, it is preferable that the liquid crystal is sprayed in a state where the temperature of the liquid crystal is low so that the liquid crystal before reaching the substrate solidifies or has a high viscosity. Is good.

With this configuration, (c−
Also in the overlapping step and the pressing step in 1) or (c-2), since the viscosity of the liquid crystal is high, the risk of contact with the sealant is reduced.

In carrying out the fourth or sixth invention, it is preferable to carry out the first method.

With this configuration, the liquid crystal is completely sealed, and a liquid crystal layer having a predetermined thickness can be formed. Further, by performing the superposing step and the pressing step (c-1) in a vacuum, it is possible to further eliminate bubbles from remaining in the liquid crystal layer.

In carrying out the fourth or sixth invention, it is preferable to carry out the second method. With such a configuration, the same operation and effect as in the first method can be achieved.
It can be effective.

In practicing the fourth or sixth invention, it is preferable that the curing of the sealant is performed by irradiating the sealant with ultraviolet rays.

By adopting such a configuration, the time required for the curing reaction can be reduced as compared with the configuration in which the sealant is thermally cured.

In practicing the fourth or sixth invention, preferably, after the step of curing the sealant,
In order to return the viscosity of the liquid crystal to a normal state, it is preferable to include at least a step of heating the liquid crystal.

With this configuration, the liquid crystal whose viscosity has been increased by lowering the temperature in the preliminary step of forming the liquid crystal layer can be returned to a viscosity which can be used as a liquid crystal display element by lowering the viscosity again.

In carrying out the first to sixth aspects of the present invention, preferably, the preliminary step of forming a liquid crystal layer is performed in a vacuum or an inert gas atmosphere.

By adopting such a structure, in the liquid crystal layer formation preparatory step, bubbles are less likely to be mixed in the liquid crystal dropped, applied or sprayed, so that a liquid crystal layer free of bubbles can be formed. .

In carrying out the first to sixth aspects of the present invention, it is preferable that the substrate is formed of a material having a light transmitting property.

By adopting such a configuration, even in the case of a reflective or transmissive liquid crystal display device, the substrate does not completely absorb visible light, which is display light of liquid crystal, and therefore, the It can be used as an element. Here, translucency means having a property of transmitting at least a part of visible light used as display light of a liquid crystal display element.

According to the liquid crystal injection device of the present invention,
In a liquid crystal injecting device for dropping liquid crystal to form a liquid crystal layer on a substrate, a plurality of through holes for exuding the liquid crystal are formed.

With this configuration, when this liquid crystal injection device is used, liquid crystal can be uniformly dropped over a predetermined range on one surface of the substrate. Here, if the liquid crystal injection device is filled with an amount of liquid crystal necessary for forming a liquid crystal layer, the liquid crystal can simultaneously seep out from a plurality of through-holes and be dropped, so that it can be easily and quickly dropped. It can be performed. Here, the amount of liquid crystal to be exuded is an amount of liquid crystal necessary for forming a liquid crystal layer (also referred to as a predetermined amount). Further, in order to form the liquid crystal layer as a liquid crystal layer having a uniform thickness and no bubbles,
Normally, design liquid crystal dropping conditions such as the amount of liquid crystal dropped, the dropping speed, and the dropping range are determined. In consideration of the liquid crystal dropping conditions, the hole diameter, shape, number, interval, the range in which the liquid crystal injection device has the through holes, and the like are set. In addition, what is exuded and dropped is not limited to only liquid crystal, and may be, for example, a mixture of liquid crystal and a spacer.

In implementing the liquid crystal injection device of the present invention, it is preferable that the liquid crystal injection device is made of an inorganic material. With such a configuration, a liquid crystal injecting device that is stable and stable against heat fluctuation can be manufactured.

In practicing the liquid crystal injecting device of the present invention, it is preferable to provide a pressurizing means for adjusting the amount of liquid crystal oozing out by applying a predetermined pressure to the liquid crystal. With this configuration, the liquid crystal can be uniformly dropped from each through hole at a predetermined speed.

According to the liquid crystal spray container of the present invention, the liquid crystal spray container for spraying the liquid crystal for forming the liquid crystal layer on the substrate is provided with a spray port for spraying the liquid crystal. It is characterized by the following.

With this configuration, when this liquid crystal scattering container is used, the liquid crystal can be uniformly spread over a predetermined range on one surface of the substrate.
At this time, if the amount of liquid crystal necessary for forming the liquid crystal layer is filled in the liquid crystal scattering container, the liquid crystal can be sprayed from the spray opening, so that spraying can be performed easily and quickly. Here, the amount of the liquid crystal to be scattered means a liquid crystal amount (also referred to as a predetermined amount) necessary for forming a liquid crystal layer. Further, in order to form the liquid crystal layer as a liquid crystal layer having a uniform film thickness and having no air bubbles remaining, design spray conditions of the liquid crystal such as a spray amount, a spray speed and a spray range of the liquid crystal are usually determined. The diameter and shape of the spray port are set in consideration of the conditions for spraying the liquid crystal. In addition, what is exuded and scattered is not limited to only the liquid crystal, and may be, for example, a mixture of a liquid crystal and a spacer.

In practicing the container for spraying liquid crystal of the present invention, it is preferable to provide a pressurizing means for adjusting the amount of sprayed liquid crystal by applying a predetermined pressure to the liquid crystal. With such a configuration, the liquid crystal can be uniformly sprayed at a predetermined speed from the spray port.

[0064]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the size, shape, and arrangement of each component are only schematically shown to an extent that the present invention can be understood, and numerical conditions described below are merely examples. .

First, a method for manufacturing a liquid crystal display element of the present invention, including a preliminary step of forming a liquid crystal layer, which is a characteristic part of the present invention, will be schematically described. The method for manufacturing a liquid crystal display element according to the present invention includes a sealing agent forming step (a-1) or (a-2), a liquid crystal layer forming preliminary step (b-1) or (b-2), and (c-1). ) Or (c-2), and a curing step (d-1) or (d-2). Hereinafter, these (a-1) to (d-1)
Each step of (a-2) to (d-2) will be described.

A substrate used in the present invention and a counter substrate facing the substrate (hereinafter, these substrates may be collectively referred to as a pair of substrates facing each other) are previously provided with one surface, That is, transparent electrodes are formed on the first substrate surface and the first counter substrate surface. As the pair of opposed substrates, for example, a glass substrate may be used, but another material such as a flexible plastic may be used.
Plastic is easy to mold the substrate,
The substrate may be a curved substrate other than a planar substrate. Also,
When flexible plastic is used, airtightness is enhanced when the liquid crystal is sealed, so that bubbles are less likely to remain in the liquid crystal layer of the liquid crystal display device. Further, the pair of substrates facing each other needs to be formed of a light-transmitting material. At this time, even if the liquid crystal display element is a reflective or transmissive liquid crystal display element, these substrates do not completely absorb visible light, which is display light of the liquid crystal, and thus can be used as a liquid crystal display element. .

First, the sealant forming step (a-1) of the first method or (a-2) of the second method is performed. In the present invention, the liquid crystal layer forming preliminary step (b-1) or (b-2) is performed on the substrate. However, the first method, that is, the formation of the sealant of (a-1) is performed on the substrate on which the liquid crystal layer forming preliminary step is performed, and the second method includes:
That is, the formation of the sealant in (a-2) is performed on the counter substrate on which the liquid crystal layer formation preliminary step is not performed. Further, the formation of the sealant is performed on the first substrate surface on which the transparent electrode is formed in the first method, and on the first opposing substrate surface on which the transparent electrode is formed in the second method. Do it for

In the first method, the sealant is formed on the periphery of the first substrate surface of the substrate.
In the method (1), a sealant is applied to the peripheral portion of the first opposing substrate surface of the opposing substrate by, for example, screen printing or a transfer method. As the sealant, for example, one made of an ultraviolet-curable resin, specifically, a known photoresist that is cured by ultraviolet rays may be used. Further, a thermosetting resin may be used.

The following (b-1) or (b-2)
In the liquid crystal layer formation preparatory step described above, it is not necessary to mix a spacer into the liquid crystal. However, when no spacer is mixed, a spacer dispersing step may be performed before or after the step (a-1) or (a-2). Must be provided. As the spacer spraying method, a conventionally known method may be used, for example, a wet method in which a spacer is dispersed in a low-boiling solvent and an organic solvent is blown off after spraying the spacer dispersion,
There is a dry method in which spacers are dispersed by airflow.

Next, the liquid crystal layer forming preliminary step of (b-1) of the first method or (b-2) of the second method is performed. This step is a part of the first to sixth aspects of the present invention, and will be described later in detail. Here, when performed by the above-described first method, the liquid crystal layer forming preliminary step (b-1) is performed on the first substrate surface of the substrate, that is, the surface of the substrate on which the transparent electrode is formed, of the sealing agent. Perform for the inner area. In the case of performing by the above-described second method, the liquid crystal layer forming preliminary step (b-2) is performed inside the portion of the first substrate surface of the substrate that comes into contact with the sealant in the subsequent overlapping step. Is performed for the region of.

Next, the overlapping step and the pressing step of (c-1) of the first method or (c-2) of the second method are performed. First, as a superposition step, (c-
In the case of 1), the substrate subjected to the step (b-1) and the counter substrate are overlapped so that the first substrate is on the inside.
In the case of (c-2) of the second method, the substrate that has been subjected to the step (b-2) and the opposing substrate are placed such that the first substrate surface and the first opposing substrate surface are inside. Overlap.
At this time, both substrates, that is, a pair of opposing substrates are aligned and overlapped while maintaining parallelism. This superposition is performed while at least the inside of the pair of opposing substrates is kept in a vacuum. Thereafter, the pair of substrates facing each other is pressed while maintaining the vacuum state. As described above, by overlapping and pressing under vacuum, it is possible to prevent bubbles from remaining in the liquid crystal layer.

Next, the curing step (d-1) of the first method or (d-2) of the second method is performed. This curing method is performed according to the type of the sealant formed in the step (a-1) of the first method or the step (a-2) of the second method. For example, when an ultraviolet-curable resin is used as the sealant, at least the sealant is irradiated with ultraviolet rays to be cured. When a thermosetting resin is used as the sealant, at least the sealant is heated and cured.

Through the above steps, a liquid crystal display element is completed.

The above (a-1) or (a-
Steps (2), (c-1) or (c-2), and (d-1) or (d-2) are merely preferred examples for producing a liquid crystal display element, and other arbitrary suitable steps are provided. Other methods may be used. If unnecessary, some or all of these steps may not be performed.

Next, the characteristic part of the present invention (b-
The liquid crystal layer forming preliminary step (1) or (b-2) will be described in detail.

First, a preparatory step for forming a liquid crystal layer according to the first embodiment will be described with reference to FIGS. 1, 2 and 3.
FIG. 1 is a diagram showing a structure of a liquid crystal injection device used in the first embodiment, FIG. 2 is a diagram showing a state of dropping liquid crystal according to the first embodiment, and FIG. FIG. 4 is a diagram showing a substrate after liquid crystal is dropped in the embodiment. 1 and FIG. 2 are shown by cross-sectional cuts. Also,
FIG. 3 is shown as a plan view.

In the liquid crystal layer forming preliminary step of the first embodiment, liquid crystal is dropped by the method of the first invention. Therefore, hereinafter, it is also referred to as a liquid crystal dropping step. In the method of the first invention, before and after the above-mentioned step (a-1) or (a-2), the dispersion of the spacers has already been completed. Alternatively, the method of the first invention also applies to the case where the application of the spacer is not required.

First, the liquid crystal injection device 1 as shown in FIG.
Prepare 0. The liquid crystal injection device 10 has a plurality of through holes 14 through which the liquid crystal 12 oozes out and the liquid crystal 12 is dropped. In addition, it has a filling portion 16 that can fill the liquid crystal 12. The filling portion 16 has a structure that is sealed during the dropping of the liquid crystal 12, but the through hole 14 is filled with the filling portion 1 so that the liquid crystal seeps out to the outside through the through hole 14.
6 penetrates. That is, the filling portion 16 is
Is connected to the outside through

Further, the liquid crystal injecting device 10 is provided with a pressurizing means for adjusting the amount of the liquid crystal 12 oozing out by applying a predetermined pressure to the liquid crystal 12. In this embodiment, as this pressurizing means, an inlet 18 for connecting the filling portion 16 to the outside is provided separately from the through-hole 14, and the inlet 1
Means for feeding gas for pressurizing the liquid crystal 12 in the filling unit 16 from the filling unit 16 is provided. Therefore, when the liquid crystal 12 is dropped, a predetermined pressure is applied to the liquid crystal 12 filled in the filling portion 16 by sending a gas, for example, air into the filling portion 16 from the inlet 18 to reduce the amount of the liquid crystal 12 that seeps out. Adjust. The inlet 18 described as a part of the pressurizing means can be used as a part of the liquid crystal filling means for filling the filling part 16. That is, the liquid crystal 1 is supplied through the inlet 18 by another liquid crystal filling means such as a liquid crystal filling device.
2 can be filled.

The pressing means is not limited to the above-mentioned means, but may be any other suitable means. For example, the upper wall 20 of the liquid crystal injection device 10
It is also possible to use a method of pressing the upper wall 20 from the outside to increase the pressure inside the filling portion 16 to pressurize the liquid crystal 12 when the liquid crystal 12 is dropped (not shown). ). At this time, the inlet 18 does not need to be provided, and when it is provided, the inlet 18 is sealed so that the pressure inside the filling section 16 can be increased. In this case, if the upper wall 20 has a structure that can be removed from the liquid crystal injecting device 10, the upper wall 20 can be used as a part of the liquid crystal filling means for filling the filling portion 16. That is, since the upper wall 20 is removed and the filling portion 16 is exposed, the liquid crystal 12 can be easily filled from above the liquid crystal injecting device 10 by another liquid crystal filling means such as a liquid crystal filling device. .

The material constituting the liquid crystal injection device 10 is preferably an inorganic material such as quartz.
If it is inorganic, it is not deformed by heat change and is resistant to external pressure, and the shape of the through-hole 14 does not change. Therefore, the liquid crystal 12 can be stably and uniformly dropped regardless of the usage state of the liquid crystal 12.

In order to drop the liquid crystal 12, it is preferable to fill the liquid crystal injection device 10 with the amount of the liquid crystal 12 to be exuded in advance, that is, the amount of liquid crystal necessary for forming the liquid crystal layer. FIG. 1 shows a state where the liquid crystal 12 is filled in the liquid crystal injection device 10.
In this state, because of the surface tension due to the viscosity of the liquid crystal 12,
The liquid crystal 12 does not exude from the through hole 14.

Next, the liquid crystal injection device 10 is positioned close to the substrate on which the liquid crystal 12 is to be dropped. FIG.
FIG. 3 is a view showing a state of liquid crystal dripping. This alignment will be described with reference to FIG. In this embodiment, the liquid crystal layer forming preliminary step (b-1), which is the first method described above, is performed. Therefore, the sealant 24 is formed on the substrate 22. Then, the liquid crystal 12 is dropped on a region inside the sealant 24 on the first substrate surface of the substrate 22. Therefore, the liquid crystal injection device 10
Positioning is performed so that the region of the lower wall 26 where the through hole 14 is formed fits in the region inside the sealant 24. In other words, the through holes 14 need to be formed so that the region where the through holes 14 are formed at the time of positioning fits in the region inside the sealant.

The second method (b-
The liquid crystal layer forming preliminary step 2) may be performed. In this case, no sealant is formed on the substrate, and the sealant is formed on the opposing substrate. Then, the liquid crystal is dropped on the first substrate surface of the substrate in a region inside the portion in contact with the sealant in the subsequent overlapping step (c-2). For this reason, the region where the through hole 14 of the lower wall 26 of the liquid crystal injection device 10 is formed corresponds to (c-2).
In the superposition step, the alignment is performed so as to fit in the region inside the portion in contact with the sealant.

In the second to sixth embodiments to be described later, the liquid crystal layer forming preliminary step (b-1), which is the first method, is also performed, but the second method is also the same. (B-
2) A step may be performed.

In FIG. 2, the flat substrate 22
Is used, but is not limited to this.
May be used. However, at this time, the liquid crystal injection device 10 having the shape of the lower wall 26 that matches the shape of the surface of the substrate 22 is used. Therefore, the liquid crystal 12 can be uniformly dropped as in the case where the substrate 22 is flat.

Next, by operating the pressurizing means,
As shown in FIGS. 2A and 2B, a predetermined amount of the liquid crystal 12 is oozed out of the plurality of through holes 14 by increasing the air pressure in the filling portion 16. 2 (A) and 2 (B) are diagrams each showing a state in which the liquid crystal 12 is seeping out and dripped. However, the viscosity of the liquid crystal 12, the diameter and interval of the through holes 14, the pressure applied by the pressing means, etc. 2 changes the manner of dropping, and FIG.
Both cases such as (A) and (B) are possible. That is, in the case of FIG. 2A, the liquid crystal 12 is independently dropped on the substrate 22 from each through hole 14.
In the case of (B), the liquid crystal 1 oozing out from each through hole 14
2 are joined by the lower wall 26, and then the substrate 2
2 has been dropped. As shown in these figures, each through hole 14
In order to allow the liquid crystal 12 to seep out of the through holes 14 uniformly, the diameter of the through holes 14 is made uniform, and the through holes 14
It is necessary to uniformly press the liquid crystal 12 in the vicinity. Here, the amount of the liquid crystal 12 to be exuded is a liquid crystal amount (also referred to as a predetermined amount) necessary for forming a liquid crystal layer. The amount of liquid crystal necessary for forming the liquid crystal layer is slightly larger than the volume of the liquid crystal layer formed when the liquid crystal display device is completed. This is because excess liquid crystal 12 flows out in the pressing step (c-1). The volume of the liquid crystal layer is obtained by subtracting the volume of the spacer from the amount obtained by multiplying the area between the pair of substrates facing each other when the liquid crystal display element is completed (hereinafter also referred to as a cell gap) by the area where the liquid crystal layer is formed. Volume. The cell gap depends on the type of liquid crystal 12 to be used, but is generally about 5 μm. Therefore, even when an A4 size substrate is used, the amount of liquid crystal necessary for forming a liquid crystal layer is about 5 μm. 0.3 g. Further, in order to form the liquid crystal layer as a liquid crystal layer having a uniform thickness and having no air bubbles remaining, normally, design liquid crystal dropping conditions such as a dropping amount, a dropping speed, and a dropping range of the liquid crystal 12 are determined. In consideration of the liquid crystal dropping conditions, the hole diameter, shape, number, interval,
In addition, a range where the through hole 14 is provided in the liquid crystal injection device 10 is set. When filling the liquid crystal 12, the liquid crystal 12 does not exude from the through hole 14, and the liquid crystal 12 exudes from the through hole 14 by applying pressure when the liquid crystal 12 is dropped. 14
Set the hole diameter of In consideration of the above, the through hole 14
May be set to, for example, 100 μm. Further, it is preferable that the pressure applied by the pressurizing means is a pressure that can realize the above-described drop amount and drop rate of the liquid crystal 12.

FIG. 3 shows a state in which the liquid crystal 12 is dropped on the substrate 22 by this method. It can be seen that the liquid crystal 12 is dripped in a uniform state in the area inside the sealant 24. Even a very small amount of liquid crystal 12 as described above can be dropped uniformly. Therefore, in the pressing step (c-1), the liquid crystal 12 spreads uniformly, and as a result, a liquid crystal layer having a uniform film thickness and free of bubbles can be formed. Further, if the liquid crystal injection device 10 is filled with an amount of the liquid crystal 12 necessary for forming the liquid crystal layer, the liquid crystal 12 can be simultaneously oozed out from the plurality of through holes 14 and dropped. Dropping can be performed quickly.

Next, a preliminary step of forming a liquid crystal layer according to the second embodiment will be described with reference to FIGS. FIG. 4 is a diagram showing a structure of a liquid crystal injection device used in the second embodiment, and FIG. 5 is a diagram showing a state of dropping liquid crystal and spacers according to the second embodiment. 4 and 5
Is indicated by the cut end of the cross section. In the liquid crystal layer forming preliminary step of the second embodiment, liquid crystal is dropped by the method of the second invention. Therefore, hereinafter, it is also referred to as a liquid crystal dropping step.

The second embodiment has the same structure as the first embodiment except that the liquid crystal and the spacer are simultaneously dropped. Therefore, the description of the same components will be omitted.

In the second embodiment, the liquid crystal injection device 10 is mixed with the liquid crystal 12 and the spacer 28 in a mixed state.
These mixtures are oozed out of the through holes 14 and dropped. As the spacer 28, a commonly used spacer may be used, for example, a glass fiber or a glass bead may be used. The diameter of the spacer 28 is
A spacer having a size corresponding to the cell gap is used. For example, when the cell gap is 5 μm, the diameter of the spacer 28 may be 5 μm. As the spacer 28, a spacer 28 having a uniform size is used. As a method of arranging the sizes, for example, the spacers 28 may be put in water and selected according to the difference in the floating manner.

Preferably, the liquid crystal 12 and the spacer 2
It is desirable to mix the mixture with the liquid crystal 8 before filling the liquid crystal injection device 10. This mixing may be performed by any suitable method, for example, by stirring with ultrasonic waves. Then, a predetermined amount of the mixture of the liquid crystal 12 and the spacer 28 is uniformly filled. Here, the predetermined amount of the liquid crystal 12 is a liquid crystal amount necessary for forming a liquid crystal layer, and is a predetermined amount of the spacer 28.
Is the amount of the spacer 28 contained in the liquid crystal display element when the liquid crystal display element is completed. Usually, the spacers 28 need only be present in the liquid crystal display element at about 10 to 100 pieces / cm ² , so that the necessary volume of the spacers 28 can be calculated. Further, the same liquid crystal injection device 10 as that used in the first embodiment may be used. Liquid crystal 1
FIG. 4 shows a state in which the mixture of the liquid crystal 2 and the spacer 28 is filled in the liquid crystal injection device 10. In addition, here, it was configured to be sufficiently stirred in advance before filling, but is not limited to this, for example, may be mixed after filling and before dropping, or may be mixed during dropping. Alternatively, they may be combined and mixed, for example, both before and after filling.

Thereafter, as in the first embodiment, the mixture of the liquid crystal 12 and the spacer 28 is oozed out of the liquid crystal injecting device 10 to thereby obtain the liquid crystal as shown in FIGS. 5A and 5B. 12 and the spacer 28 are dropped on the first substrate surface of the substrate 22. 5 (A) and 5 (B) are diagrams each showing a state in which the liquid crystal 12 and the spacer 28 are oozing out and dropped, but depending on the viscosity of the liquid crystal 12, the hole diameter and interval of the through holes 14, and the pressing means. The manner of dropping varies depending on the applied pressure and the like, and both cases as shown in FIGS. 5A and 5B can be considered. That is, in the case of FIG.
The liquid crystal 12 and the spacer 28 are independently dropped on the substrate 22 from each through hole 14, and in the case of FIG. 2B, the liquid crystal 12 and the spacer 28 oozing out from each through hole 14 are attached to the lower wall. At 26, they are put together and then dropped onto the substrate 22.

However, unlike the first embodiment, since the spacer 28 also seeps out from the through hole 14, the hole diameter of the through hole 14 is made uniform when the liquid crystal 12 and the spacer are uniformly pressed by the pressing means. 28 must be designed to be dropped.

According to the second embodiment, the liquid crystal 12 is uniformly spread over the first substrate surface of the substrate 22 over a predetermined range.
And the spacer 28 can be dropped. Therefore,
In the pressing step (c-1), the liquid crystal 12 spreads uniformly, and as a result, a liquid crystal layer having a uniform film thickness and free of bubbles can be formed. At the same time, the spacers 28 also spread uniformly, and as a result, a liquid crystal display device having a uniform substrate spacing can be manufactured. In addition, the liquid crystal injection device 10
If a necessary amount of liquid crystal 12 and a necessary amount of spacer 28 are filled in order to form a liquid crystal layer, a plurality of through holes 1 can be formed.
Since the liquid crystal 12 and the spacer 28 can be simultaneously exuded and dropped from 4, the drop can be easily and quickly performed. Furthermore, unlike the related art, it is not necessary to perform the dispersion of the spacers 28 and the dropping of the liquid crystal 12 in separate steps.
Therefore, the steps can be performed in one step, and the steps can be simplified.

Next, a preparatory step of forming a liquid crystal layer according to the third embodiment will be described with reference to FIGS.
FIG. 6 is a diagram showing a state in which a liquid crystal film is provided on a first transfer plate in the third embodiment, and FIG. 7 is a diagram in which a spacer is provided on a second transfer plate in the third embodiment. FIG. 8 is a diagram showing a state in which a liquid crystal film and spacers are transferred onto a substrate in the third embodiment. 6 (B), 7 and 8 are shown by cutaways in cross sections. FIG. 6A is a perspective view.

In the liquid crystal layer forming preliminary step of the third embodiment, the liquid crystal is transferred by the method of the third invention. Therefore, hereinafter, it is also referred to as a liquid crystal transfer step.

First, as shown in FIG. 6B, a first transfer plate 30 provided with a liquid crystal film 31 having a uniform thickness is prepared.
As a method of providing the liquid crystal film 31 with this uniform film thickness, any suitable method may be used. For example, a spin coating method as shown in FIG. 6A may be used. This method includes, for example, a method in which the dropping unit is placed on the first transfer plate 30 in advance.
The liquid crystal may be dropped by 9 and then the first transfer plate 30 may be rotated at a high speed to form a liquid crystal film 31 having a uniform thickness. The liquid crystal 12 included in the liquid crystal film 31
Is the amount of liquid crystal necessary for forming a liquid crystal layer.

Further, as shown in FIG. 7, a second transfer plate 32 to which a number of spacers 28 having the same size are attached is prepared. Any suitable method may be used as a method for attaching the large number of spacers 28. For example, the spacers 28 may be attached by static electricity, or may be attached by applying pressure to the spacer 28 with a gas or the like. It may be chemically adhered and adhered. The amount of the spacer to be attached is set to the amount of the spacer 28 necessary for the liquid crystal display element. Further, the attachment of the spacers 28 to the second transfer plate 32 is performed with as uniform a density as possible. Further, as a method of making the sizes of the spacers 28 uniform, for example, the method described in the second embodiment may be used.

Next, by bringing the first transfer plate 30 into contact with the second transfer plate 32, the liquid crystal film 31 on the first transfer plate 30 is formed.
Is transferred to the surface of the second transfer plate 32 to which the spacer 28 is attached. Therefore, the liquid crystal film 31 and the spacer 28 are provided on the second transfer plate 32 (not shown).
At this time, in order for the liquid crystal film 31 to be transferred to the second transfer plate 32, the adhesive force between the first transfer plate 30 and the liquid crystal film 31 is weaker than the adhesive force between the second transfer plate 32 and the spacer 28. is necessary.

Next, the liquid crystal film 31 and the spacer 28 are transferred onto the first substrate surface of the substrate 22 by bringing the second transfer plate 32 into contact with the first substrate surface of the substrate 22. Therefore, as shown in FIG. 8, the liquid crystal film 31 and the spacer 28 are formed on the substrate 22. At this time, in order for the liquid crystal film 31 and the spacer 28 to be transferred to the substrate 22, the second transfer plate 32 and the liquid crystal film 31 and the spacer 28 It is necessary that the adhesive force is weak.

As shown in FIG. 8, the transfer of the liquid crystal film 31 and the spacer 28 is performed on a region inside the sealant 24 on the first substrate surface of the substrate 22. Therefore, the first
Liquid crystal film 31 provided on transfer plate 30 and second transfer plate 3
The spacer 28 attached on the upper surface 2 must be formed and attached so as to fit in a region inside the sealant 24. Therefore, the transfer is performed after the second transfer plate 32 and the substrate 22 are positioned so that the transfer of the liquid crystal film 31 and the spacer 28 is performed on the area inside the sealant 24.

In FIGS. 6 to 8, the first transfer plate 30, the second transfer plate 32, and the substrate 22 are used in a planar shape. However, the present invention is not limited to this, and a curved one may be used. . However, at this time, the first transfer plate 30 and the second transfer plate 32 having a shape corresponding to the shape of the surface of the substrate 22 are used. Alternatively, the first transfer plate 30 and the second transfer plate 32 having elasticity or plasticity may be used. Therefore, the transfer of the liquid crystal film 31 and the spacers 28 can be performed uniformly as in the case where the substrate 22 is flat.

According to the third embodiment, the liquid crystal film 3 is uniformly formed on the first substrate surface of the substrate 22 over a predetermined range.
1 and the spacer 28 can be transferred. Therefore, in the pressing step (c-1), the liquid crystal 12 spreads uniformly, and as a result, a liquid crystal layer having a uniform film thickness and free of bubbles can be formed. At the same time, the spacers 28 also spread uniformly, and as a result, a liquid crystal display device having a uniform substrate spacing can be manufactured. Further, since the liquid crystal film 31 and the spacer 28 are transferred by a series of these transfer steps, it is not necessary to perform the dispersion of the spacer 28 and the dropping of the liquid crystal 12 in another step as in the related art. And the process can be simplified.

Next, a preparatory step for forming a liquid crystal layer according to the fourth embodiment will be described with reference to FIG. FIG. 9 is a diagram showing a state of dispersion of liquid crystal according to the fourth embodiment. Note that FIG. 9 is shown by a cross-section. In the liquid crystal layer forming preliminary step of the fourth embodiment, liquid crystal is dispersed by the method of the fourth invention. Therefore, hereinafter, it is also referred to as a liquid crystal spraying step. In the method according to the fourth aspect of the invention, when the spacers need to be sprayed, the spacers have already been sprayed before or after the step (a-1) or (a-2). Alternatively, the method of the fourth invention also applies to the case where the application of the spacer is not required. FIG. 9 shows a case where it is not necessary to disperse the spacers.

In the fourth embodiment, a container 34 for spraying liquid crystal is prepared. The liquid crystal spray container 34 has a spray port 36 for spraying the liquid crystal 12. The container 34 for spraying liquid crystal is structured so as to be sealed during the spraying of the liquid crystal 12. Is connected to the outside through

The liquid crystal spraying container 34 is provided with a pressurizing means for adjusting the amount of spraying the liquid crystal 12 by applying a predetermined pressure to the liquid crystal 12. In this embodiment, as this pressurizing means, an inlet 38 for connecting the liquid crystal spray container 34 to the outside is provided separately from the spray port 36, and the liquid crystal 12 in the liquid crystal spray container 34 is further pressed through the inlet 38. Means for feeding the gas for use. Therefore, when the liquid crystal 12 is sprayed, a predetermined pressure is applied to the liquid crystal 12 filled in the liquid crystal scattering container 34 by sending gas, for example, air into the liquid crystal scattering container 34 from the inlet 38 to spray the liquid crystal 12. Adjust the amount to do. Also,
The inlet 38 described as a part of the pressurizing means can be used as a part of the means for filling the liquid crystal container 34 with the liquid crystal. That is, the liquid crystal 12 may be filled through the inlet 38 by another liquid crystal filling means such as a liquid crystal filling device.

The pressurizing means is not limited to the above-mentioned means, but may be any other suitable means. For example, the upper wall 39 of the liquid crystal scattering container 34 is configured to be vertically movable with respect to the liquid crystal
At the time of spraying, a method of pressing the liquid crystal 12 by pressing the upper wall 39 from outside to increase the pressure inside the liquid crystal spraying container 34 may be used (not shown). At this time, the inlet 38 may not be provided, and if provided, the inlet 38 is sealed so that the pressure inside the liquid crystal spraying container 34 can be increased. In this case, if the upper wall 39 has a structure detachable from the liquid crystal scattering container 34, it can be used as a part of a liquid crystal filling means for filling the liquid crystal scattering container 34. That is, the upper wall 3
9 is removed and the liquid crystal scattering container 34 is exposed, so that the liquid crystal 12 can be easily filled from above the liquid crystal scattering container 34 by another liquid crystal filling means such as a liquid crystal filling device.

In the fourth embodiment, the liquid crystal 12 is sprayed from the spray port 36 of the liquid crystal spray container 34. For this purpose, a predetermined amount of the liquid crystal 12 is filled in the liquid crystal scattering container 34.

In this embodiment, the liquid crystal 12 to be scattered is formed into a particle shape in a state where the liquid crystal 12 is solidified or has a high viscosity in advance. However, even the ordinary liquid crystal 12 which is not formed in this way can be used in this embodiment.

In order to spray the liquid crystal 12, a predetermined amount of liquid crystal to be sprayed is filled in the liquid crystal spray container 34 in advance.
The liquid crystal spraying container 34 is positioned close to the substrate 22 on which the liquid crystal is sprayed. In this state, the liquid crystal 1
Due to the surface tension due to the viscosity of 2, the liquid crystal 1
2 does not exude. Further, a sealant 24 is formed on the substrate 22. And the liquid crystal 12
Is performed on a region inside the sealant 24 on the first substrate surface of the substrate 22. Therefore, the spray port 36
Positioning is performed so that the region where the liquid crystal 12 is scattered from within the sealant 24 is accommodated in the region inside the sealant 24. Further, it is desirable that the distance between the spray port 36 and the substrate 22 be selected so that the sprayed layer becomes uniform and in consideration of the range of spraying.

Next, by operating the pressurizing means,
As shown in FIG. 9, a predetermined amount of the liquid crystal 12 is sprayed from the spray port 36. In order to uniformly spray the liquid crystal 12 from the spray port 36 as shown in FIG.
It is necessary to select according to the type. here,
The predetermined amount of the liquid crystal 12 to be scattered is a liquid crystal amount necessary for forming a liquid crystal layer. Further, in order to form the liquid crystal layer as a liquid crystal layer having a uniform film thickness and no bubbles remaining, design spraying conditions such as the amount of sprayed liquid crystal 12, the spraying speed and the spraying range are usually determined. The diameter and shape of the spray port 36 are set in consideration of the spray conditions of the liquid crystal 12.
Also, when filling the liquid crystal, the viscosity of the liquid crystal 12 to be used is taken into consideration so that the liquid crystal 12 does not exude from the spray port 36, and the liquid crystal 12 is sprayed from the spray port 36 by applying pressure by a pressurizing means during spraying. The diameter of the spray port 36 is set. Further, it is desirable that the pressure by the pressurizing means is a pressure that can realize the above-described spray amount, spray speed and spray range.

If the position of the spray port 36 is constant with respect to the substrate 22, there is a possibility that the film thickness of the sprayed film varies, so that the liquid crystal spray container 34 is preferably used.
Is preferably spread while moving in the direction of arrow A shown in FIG. The movement of the liquid crystal scattering container 34 is caused by the sealant 2
In consideration of the formation region of No. 4, the two-dimensional process is performed in a range that is sprayed only in the region inside the sealant 24.

In addition, spraying is performed in a state where the liquid crystal 12 is kept at a low temperature so that the liquid crystal 12 before it reaches the substrate 22 solidifies or has a high viscosity. In order to perform the spraying in this manner, although not shown, for example, a liquid crystal spraying container 34
Has a temperature control device that keeps the
This is possible by a structure in which the liquid crystal scattering container 34 is placed in a room where the temperature is kept low.

As described above, the liquid crystal 12 is formed into a particle shape in a state where the liquid crystal 12 has previously solidified or has a high viscosity. Further, at the time of spraying, the liquid crystal 12 before reaching the substrate 22 has been solidified or has a high viscosity. In this state, the following problems are solved.

That is, even if the liquid crystal layer forming preliminary step is performed on the area inside the sealant 24, (c-1)
In the overlapping step and the pressing step, the liquid crystal 12 comes into contact with the sealant 24. At this time, the sealant 2
When the liquid crystal 12 and the sealant 24 come into contact with each other, a part of the sealant 24 is mixed into the liquid crystal 12 because the liquid crystal 12 does not cure, and when used as a liquid crystal display element, the performance of the liquid crystal display element is deteriorated. It becomes a factor. Further, there is a possibility that the liquid crystal 12 may contaminate the bonding surface between the pair of substrates facing the sealant 24.

However, according to the above configuration, (c
-1) The liquid crystal 1 is also used in the overlapping step and the pressing step.
Since the viscosity of the liquid crystal 2 can be increased, the possibility that the liquid crystal 12 and the sealant 24 come into contact with each other is reduced. Therefore, it is possible to prevent the above problem from occurring.

When the temperature is lowered so as to increase the viscosity of the liquid crystal 12 during spraying, the curing of the sealant 24 is performed in the curing step (d-1).
It is desirable to irradiate 4 with ultraviolet rays.

At this time, during the curing step (d-1), the viscosity of the liquid crystal 12 is kept high, and therefore, the sealing agent 24 is kept in the liquid crystal 12 until the sealing agent 24 is completely cured. The risk of partial contamination is reduced. On the other hand, when the curing of the sealant 24 is performed by heat curing,
During the curing process, the liquid crystal 12 is heated, and the viscosity decreases again. Therefore, the viscosity of the liquid crystal 12 decreases before the sealant 24 is completely cured, and as a result, the sealant 2 is contained in the liquid crystal 12 during the curing process.
4 may be mixed. Further, the time required for the curing step can be reduced as compared with the method of performing thermal curing.

When the temperature is lowered so as to increase the viscosity of the liquid crystal 12 during spraying, the viscosity of the liquid crystal 12 is returned to a normal state after the curing step (d-1). It is desirable to have at least a step of heating the liquid crystal 12. When used as a liquid crystal display element, the liquid crystal 1
No. 2 needs to be in a normal state. Examples of the heating method include a method of heating the liquid crystal display element itself by exposing the liquid crystal display element itself to room temperature, and a method of forcibly heating the liquid crystal display element itself by a heating device.

At this time, since the curing step (d-1) has been completed, even if the viscosity of the liquid crystal 12 returns to the normal state,
The possibility that a part of the sealant 24 is mixed into the liquid crystal 12 is reduced.

According to the fourth embodiment, the liquid crystal 12 can be evenly spread over the first substrate surface of the substrate 22 over a predetermined range. Therefore, in the pressing step (c-1), the liquid crystal 12 spreads uniformly, and as a result, a liquid crystal layer having a uniform film thickness and free of bubbles can be formed. If the liquid crystal 12 is filled with a necessary amount of liquid crystal 12 to form a liquid crystal layer in the liquid crystal spray container 34, the liquid crystal 12 can be sprayed from the spray port 36.
Spraying can be performed easily and quickly.

Next, a preliminary step of forming a liquid crystal layer according to the fifth embodiment will be described with reference to FIG. FIG. 10 shows the fifth
It is a figure which shows the mode of dispersion | dispersion of a liquid crystal by embodiment of FIG.
Note that FIG. 10 is shown by a cross-section. In the liquid crystal layer formation preliminary step of the fifth embodiment, the liquid crystal is dispersed by the method of the fifth invention. Therefore, hereinafter, it is also referred to as a liquid crystal spraying step.

The fifth embodiment has the same configuration as that of the fourth embodiment except that the liquid crystal and the spacers are sprayed simultaneously and the liquid crystal is sprayed in a liquid state. Therefore, the description of the same components will be omitted.

In the fifth embodiment, in a state where the liquid crystal 12 and the spacers 28 having the same size are mixed, the mixture is sprayed from the spray port 36 of the liquid crystal spray container 34. Therefore, it is preferable to mix the mixture of the liquid crystal 12 and the spacer 28 before filling the liquid crystal scattering container 34. This mixing may be performed by any suitable method, for example, by stirring with ultrasonic waves. Then, a predetermined amount of the mixture of the liquid crystal 12 and the spacer 28 is aligned and filled in the liquid crystal scattering container 34. In addition, here, it was configured to be sufficiently stirred in advance before filling, but is not limited to this, for example, may be mixed after filling and before spraying, or may be mixed during spraying. Alternatively, they may be combined and mixed, for example, both before and after filling. Also,
As a method of making the sizes of the spacers 28 uniform, for example, the method described in the second embodiment may be used.

Thereafter, as in the fourth embodiment, the mixture of the liquid crystal 12 and the spacer 28 is sprayed from the spray port 36 to spray the mixture of the liquid crystal 12 and the spacer 28 as shown in FIG. 22 on the first substrate surface. However, unlike the fourth embodiment, since the spacers 28 are also scattered from the squirt port 36, the liquid crystal 12 and the spacers 28 are scattered uniformly when the diameter of the splay port 36 is pressed by the pressing means. It is necessary to design it in such a size.

Further, in the fourth embodiment, the liquid crystal 12 is formed into a particle shape in a state where the liquid crystal 12 is previously solidified or has a high viscosity, and preferably, the liquid crystal 12 before reaching the substrate is solidified or formed. In order to increase the viscosity, the liquid crystal 12
Is sprayed in a state where the temperature is low, but in the fifth embodiment, as shown in FIG. 10, the liquid crystal 12 is sprayed in a liquid state. This is because
In the fifth embodiment, the liquid crystal 12 and the spacer 28
This is because if the liquid crystal 12 is coagulated or the viscosity is increased, the liquid crystal 12 and the spacers 28 may not be uniformly dispersed. However, similarly to the fourth embodiment, the liquid crystal 12 and the spacers 28 may be sprayed in a state where the liquid crystal 12 is solidified or has a high viscosity. In this case, it is preferable that the mixture is sufficiently stirred before filling into the liquid crystal scattering container 34, and that the mixture is rapidly dispersed after filling, or the liquid crystal scattering container 34 has a structure capable of stirring the mixture. .

According to the fifth embodiment, the liquid crystal 12 is uniformly spread over the first substrate surface of the substrate 22 over a predetermined range.
And the spacer 28. Therefore,
In the pressing step (c-1), the liquid crystal 12 spreads uniformly, and as a result, a liquid crystal layer having a uniform film thickness and free of bubbles can be formed. At the same time, the spacers 28 also spread uniformly, and as a result, a liquid crystal display device having a uniform substrate spacing can be manufactured. In addition, a container 3 for spraying liquid crystal.
If the necessary amount of the liquid crystal 12 and the necessary amount of the spacer 28 are filled in the liquid crystal layer 4 to form the liquid crystal layer, the liquid crystal 12 can be scattered from the scatter opening 36, so that the scatter can be easily and quickly performed. It can be carried out. Further, unlike the related art, the spraying of the spacers 28 and the dropping of the liquid crystal 12 do not need to be performed in separate steps, and therefore can be performed in one step.
The process can be simplified.

Next, a preliminary step of forming a liquid crystal layer according to the sixth embodiment will be described with reference to FIG. FIG. 11 (A)
FIG. 11B is a diagram illustrating a state of dispersion of liquid crystal and spacers according to the sixth embodiment, and FIG. 11B is a diagram illustrating a state in which liquid crystal is coated on spacers. Note that FIG.
(A) and (B) are shown by cross-section cuts. In the liquid crystal layer forming preliminary step of the sixth embodiment, liquid crystal is dropped by the method of the sixth invention. Therefore, hereinafter, it is also referred to as a liquid crystal spraying step.

The sixth embodiment has the same configuration as the fifth embodiment except that the liquid crystal is coated on the spacer in advance. Therefore, the description of the same components will be omitted.

First, a predetermined amount of the liquid crystal 12 is coated on a predetermined amount of the spacer 28. This coating method may be any suitable method, but as shown in FIG. 11B, the liquid crystal 12 is coated around the spacer 28 with a uniform film thickness, and the uniform film is applied to any of the spacers 28. It is desirable that a thick liquid crystal 12 be coated. Spacer 2 coated with this liquid crystal 12
8 will be referred to hereinafter as coated spacer 40.

Next, the coated spacer 4
0 is filled in the container 34 for spraying liquid crystal. At this time, since the liquid crystal 12 is uniformly coated on each spacer 28, the liquid crystal 1 is coated as in the fifth embodiment.
There is no need for a step of mixing 2 and spacer 28.

In this embodiment, spraying is performed in a state where the liquid crystal 12 is kept at a low temperature so that the liquid crystal 12 before it reaches the substrate 22 solidifies or has a high viscosity. That is, the coated spacer 40
Keeps a particulate shape even during spraying, as shown in FIG. 11 (B). In order to perform the spraying in this manner, although not shown, for example, a temperature control device that keeps the liquid crystal spraying container 34 at a low temperature is provided, or in a room where the liquid crystal spraying container 34 is kept at a low temperature. This is possible depending on the structure that is placed.

Next, the coated spacers 40 are scattered, but may be sprayed in the same manner as in the fifth embodiment as shown in FIG. However, when the temperature is low as described above, the viscosity is high, and it may be difficult to spray under the same conditions as in the case of room temperature, or it may not be uniformly sprayed. Therefore, for example, the diameter of the spray port 36 may be changed, or the pressure by the pressing means may be changed. Further, a wet spraying method or a dry spraying method may be performed as in the conventional spacer spraying method described in the first embodiment.

As described above, in this embodiment, the liquid crystal 12 is sprayed in a state where the temperature of the liquid crystal 12 is low so that the liquid crystal 12 before it reaches the substrate 22 is solidified or has a high viscosity. As in the fourth embodiment, it is possible to prevent the problem that the liquid crystal 12 contaminates the bonding surfaces of the pair of substrates facing the sealant 24 from occurring.

In this embodiment, (d−
In the curing step 1), it is desirable to cure the sealant 24 by irradiating the sealant 24 with ultraviolet rays. At this time, the same operation and effect as described in the fourth embodiment can be obtained.

In this embodiment, (d-
After the curing step 1), it is preferable to include at least a step of heating the liquid crystal 12 in order to return the viscosity of the liquid crystal 12 to a normal state. At this time, the same operation and effect as described in the fourth embodiment can be obtained.

In this embodiment, the substrate 2
The liquid crystal 12 is set to have a low temperature so that the liquid crystal 12 before it reaches 2 is solidified or has a high viscosity. However, the present invention is not limited to this.

According to the sixth embodiment, in addition to the effects produced in the fifth embodiment, the following further effects are produced. That is, since the liquid crystal 12 is sprayed in a state where the liquid crystal 12 is coated on the spacer 28 in advance, the mixing state of the liquid crystal 12 and the spacer 28 is always uniform at the time of spraying.
8 can be sprayed.

In the first to sixth embodiments described above, the first and second liquid crystal layer forming preliminary steps are performed in the first and second embodiments.
In the embodiment, it is preferable to perform the dripping, in the third embodiment, the application, and in the fourth to sixth inventions, the spraying is performed in a vacuum or an inert gas atmosphere. In order to achieve such a configuration, for example, the application, application, or application may be performed in a room that can be maintained in a vacuum or an inert gas atmosphere. By adopting such a configuration, bubbles are less likely to be mixed into the scattered, coated or scattered liquid crystal, and thus a liquid crystal layer in which no bubbles remain can be formed.

[0141]

As is clear from the above description, the first
According to the method of manufacturing a liquid crystal display element of the invention, a liquid crystal injection device having a plurality of through holes is prepared, a predetermined amount of liquid crystal is oozed out of the through holes, and the liquid crystal is dropped on one surface of the substrate. A liquid crystal layer forming preliminary step is included. Further, according to the method for manufacturing a liquid crystal display element of the second invention, a liquid crystal injection device having a plurality of through holes is prepared, and the liquid crystal is mixed with a spacer having a uniform size. The method includes a preliminary step of forming a liquid crystal layer in which a predetermined amount of the liquid crystal and the spacer is exuded and the liquid crystal and the spacer are dropped on one surface of the substrate. Also, the third
According to the method of manufacturing a liquid crystal display element of the invention, a first transfer plate provided with a liquid crystal film having a uniform thickness and a second transfer plate provided with a number of spacers of uniform size are prepared. And transferring the liquid crystal film to the side of the second transfer plate to which the spacer is attached, and transferring the transferred liquid crystal film and spacer to one surface of the substrate. Also, the fourth
According to the method for manufacturing a liquid crystal display element of the invention, a liquid crystal layer forming container having a spray port is prepared, and a liquid crystal layer forming preliminary step of spraying a predetermined amount of liquid crystal from the spray port onto one surface of the substrate is included. . According to the method for manufacturing a liquid crystal display element of the fifth invention, a liquid crystal spray container having a spray port is prepared, and the liquid crystal is mixed with a spacer having a uniform size. A liquid crystal layer forming preliminary step of dispersing a predetermined amount of liquid crystal and spacers on one surface of the substrate is included. Also, the sixth
According to the method for manufacturing a liquid crystal display element of the invention, a liquid crystal spray container having a spray port is prepared, and a predetermined amount of liquid crystal and spacers are applied from the spray port to one surface of the substrate in a state where the liquid crystal is coated on the spacer in advance. A preliminary step of forming a liquid crystal layer to be scattered on is included.

Therefore, according to the first and fourth aspects, the liquid crystal can be uniformly dropped or scattered over one surface of the substrate over a predetermined range. Also, the second, third,
According to the fifth and sixth aspects, the liquid crystal and the spacer are uniformly dropped on one surface of the substrate over a predetermined range.
It can be transferred or sprayed. As a result, the first to sixth
According to the invention, in the subsequent pressing step, it is possible to form a liquid crystal layer in which the liquid crystal is uniformly spread, has a uniform film thickness, and in which no bubbles remain. At the same time, in the second, third, fifth, and sixth inventions, the spacers also spread uniformly, and as a result, a liquid crystal display element having a uniform substrate spacing can be manufactured.

In the first and second aspects of the present invention, if the liquid crystal filling device is filled with a necessary amount of liquid crystal to form a liquid crystal layer, the liquid crystal can be dropped from the through hole. Dropping can be performed easily and quickly. In the fourth to sixth aspects of the present invention, the liquid crystal can be sprayed from the spraying port by filling the liquid crystal scattering container with an amount of liquid crystal necessary for forming the liquid crystal layer. Spraying can be performed quickly.

Further, in the second, third, fifth and sixth aspects of the present invention, the liquid crystal and the spacer are dropped, transferred or dispersed in a mixed state. It is not necessary to perform the dropping in a separate step, and therefore, the dropping can be performed once or in a series of steps, and the step can be simplified.

In the fourth and sixth inventions, when the spraying is performed at a low temperature so that the viscosity of the liquid crystal is sufficiently high, the viscosity of the liquid crystal is high even in the superposing step and the pressing step. Therefore, the possibility of contact with the sealant is reduced. Therefore, it is possible to solve the problem that the performance of the liquid crystal display element is deteriorated due to mixing of the sealant into the liquid crystal.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of a liquid crystal injection device used in a first embodiment.

FIG. 2 is a diagram showing a state of dropping of liquid crystal according to the first embodiment.

FIG. 3 is a diagram showing a substrate after liquid crystal is dropped in the first embodiment.

FIG. 4 is a diagram showing a structure of a liquid crystal injection device used in a second embodiment.

FIG. 5 is a diagram illustrating a state of dropping of liquid crystal and spacers according to a second embodiment.

FIG. 6 is a diagram illustrating a state in which a liquid crystal film is provided on a first transfer plate in a third embodiment.

FIG. 7 is a diagram illustrating a state in which a spacer is provided on a second transfer plate in the third embodiment.

FIG. 8 is a diagram showing a state where a liquid crystal film and spacers are transferred onto a substrate in a third embodiment.

FIG. 9 is a diagram showing a state of dispersion of liquid crystal according to a fourth embodiment.

FIG. 10 is a diagram showing a state of dispersion of liquid crystals and spacers according to a fifth embodiment.

FIG. 11 is a diagram showing a state of dispersion of a liquid crystal and spacers according to a sixth embodiment.

[Explanation of symbols]

 10: Liquid crystal injection device 12: Liquid crystal 14: Through hole 16: Filling portion 18: Inlet 20: Upper wall 22: Substrate 24: Sealant 26: Lower wall 28: Spacer 29: Dropping means 30: First transfer plate 31: Liquid crystal Membrane 32: Second transfer plate 34: Liquid crystal spray container 36: Spray port 38: Inlet 39: Upper wall 40: Coated spacer

Claims (21)

[Claims] When a liquid crystal display device is manufactured by providing a liquid crystal layer on a substrate, a liquid crystal injection device having a plurality of through holes is prepared.
And a preparatory step of forming a liquid crystal layer in which a predetermined amount of liquid crystal is oozed out of the through hole and the liquid crystal is dropped on one surface of the substrate (referred to as a first substrate surface). Method. 2. In preparing a liquid crystal display element by providing a liquid crystal layer on a substrate, a liquid crystal injection device having a plurality of through holes is prepared.
In a state where the liquid crystal and the spacers of the same size are mixed, a predetermined amount of the liquid crystal and the spacer are oozed out of the through hole, and one surface of the substrate (referred to as a first substrate surface).
A method for manufacturing a liquid crystal display element, comprising a preliminary step of forming a liquid crystal layer on which the liquid crystal and the spacer are dropped. 3. When manufacturing a liquid crystal display element by providing a liquid crystal layer on a substrate, a first transfer plate provided with a liquid crystal film having a uniform thickness and a plurality of spacers having a uniform size are attached. 2 transfer plate, and transferring the liquid crystal film to the side of the second transfer plate on which the spacer is attached, and then transferring the transferred liquid crystal film and the spacer to one of the substrates. A preliminary step of forming a liquid crystal layer to be transferred onto a surface (referred to as a first substrate surface). 4. When manufacturing a liquid crystal display element by providing a liquid crystal layer on a substrate, a liquid crystal spray container having a spray port is prepared, and a predetermined amount of liquid crystal is supplied from the spray port to one surface of the substrate. (A first substrate surface). A method for manufacturing a liquid crystal display element, comprising a preliminary step of forming a liquid crystal layer dispersed on the first liquid crystal layer. 5. In manufacturing a liquid crystal display element by providing a liquid crystal layer on a substrate, a liquid crystal spray container having a spray port is prepared, and the liquid crystal is mixed with a spacer having a uniform size. A liquid crystal layer forming preliminary step of spraying a predetermined amount of the liquid crystal and the spacer from the spray port onto one surface of the substrate (referred to as a first substrate surface). Production method. 6. In manufacturing a liquid crystal display element by providing a liquid crystal layer on a substrate, a spraying container having a spraying port is prepared, and the liquid crystal is coated on a spacer in advance, and the liquid crystal is coated on the substrate through the spraying port. A method for manufacturing a liquid crystal display element, comprising a preliminary step of forming a liquid crystal layer by spraying a predetermined amount of liquid crystal and spacers on one surface (first substrate surface) of the substrate. 7. The method for manufacturing a liquid crystal display element according to claim 1, wherein a sealant is provided on a peripheral portion on the first substrate surface before the liquid crystal layer formation preliminary step. The liquid crystal layer forming preliminary step is performed on a region inside the sealant on the first substrate surface, and after the liquid crystal layer forming preliminary step, the substrate faces the substrate. And a substrate (referred to as a counter substrate) to be superimposed in a state where the first substrate surface is on the inside and at least the inside of both substrates is kept in a vacuum,
A method of manufacturing a liquid crystal display element, comprising: a step of pressing the substrate while maintaining the state; and a step of curing the sealant after the pressing step. 8. The method for manufacturing a liquid crystal display element according to claim 1, wherein a substrate facing the substrate (referred to as a counter substrate) is provided before the liquid crystal layer formation preliminary step. A step of providing a sealant on a peripheral portion on one surface (referred to as a first opposing substrate surface). The preliminary step of forming a liquid crystal layer includes: Performed on a region inside a portion in contact with a sealing agent, and after the liquid crystal layer formation preliminary step, the substrate and the counter substrate are brought into a state in which the first substrate surface and the first counter substrate surface are inside. And, at least the two substrates are superimposed in a state where the inside of the two substrates are kept in a vacuum, and then has a step of pressing after maintaining that state, and, after the pressing step, the sealing agent Characterized by having a curing step Manufacturing method of a liquid crystal display element. 9. The method for manufacturing a liquid crystal display element according to claim 4, wherein the liquid crystal to be scattered is formed into a particle shape in a state where the liquid crystal is solidified or has a high viscosity in advance. Device manufacturing method. 10. The method for manufacturing a liquid crystal display element according to claim 6, wherein the liquid crystal is kept at a low temperature so that the liquid crystal before it reaches the substrate solidifies or has a high viscosity. A method for manufacturing a liquid crystal display element, wherein the spraying is performed. 11. The method for manufacturing a liquid crystal display element according to claim 9, further comprising, before the liquid crystal layer forming preliminary step, a step of providing a sealant on a peripheral portion on the first substrate surface, The liquid crystal layer formation preliminary step is performed on a region inside the sealant on the first substrate surface, and after the liquid crystal layer formation preliminary step, the substrate and a substrate facing the substrate (opposite the substrate) Are overlapped with each other in a state where the first substrate surface is on the inside and at least the inside of both substrates is kept in a vacuum.
A method of manufacturing a liquid crystal display element, comprising: a step of pressing the substrate while maintaining the state; and a step of curing the sealant after the pressing step. 12. The method for manufacturing a liquid crystal display element according to claim 9, wherein before the liquid crystal layer forming preliminary step, one surface of a substrate facing the substrate (referred to as a counter substrate). A step of providing a sealant on a peripheral portion of the first substrate surface), and the liquid crystal layer forming preliminary step is a portion of the first substrate surface which comes into contact with the sealant in a subsequent overlapping step. After the liquid crystal layer formation preliminary step, the substrate and the counter substrate are in a state where the first substrate surface and the first counter substrate surface are inside, and A step of superimposing at least the inside of both substrates in a state of being kept in a vacuum, a step of pressing after keeping the state, and a step of curing the sealant after the pressing step Liquid crystal table characterized by the following A method for manufacturing a display element. 13. The method for manufacturing a liquid crystal display element according to claim 11, wherein the curing of the sealant is performed by irradiating the sealant with ultraviolet rays. . 14. The method for manufacturing a liquid crystal display element according to claim 11, wherein after the step of curing the sealant, at least the liquid crystal is heated to return the viscosity of the liquid crystal to a normal state. A method for manufacturing a liquid crystal display device, comprising the steps of: 15. The liquid crystal display device according to claim 1, wherein the preliminary step of forming a liquid crystal layer is performed in a vacuum or an inert gas atmosphere. Device manufacturing method. 16. The method of manufacturing a liquid crystal display device according to claim 1, wherein the substrate is formed of a light-transmitting material. Production method. 17. A liquid crystal injection device for dropping liquid crystal to form a liquid crystal layer on a substrate, wherein a plurality of through holes for extruding the liquid crystal are formed. . 18. The liquid crystal injection device according to claim 17, wherein the liquid crystal injection device is made of an inorganic material. 19. The liquid crystal injecting device according to claim 17, further comprising a pressurizing means for adjusting an amount of the liquid crystal exuding by applying a predetermined pressure to the liquid crystal. Liquid crystal injection equipment. 20. A container for spraying liquid crystal for spraying liquid crystal to form a liquid crystal layer on a substrate, wherein a spray port for spraying the liquid crystal is formed. 21. The liquid crystal spraying container according to claim 20, further comprising a pressurizing unit for adjusting a spray amount of the liquid crystal by applying a predetermined pressure to the liquid crystal. Container.