JP3165640B2 - Liquid crystal display element manufacturing method and liquid crystal display element manufacturing apparatus - Google Patents

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 and an apparatus for manufacturing a liquid crystal display element, and more particularly to a method for sealing an injection port and an apparatus for sealing an injection port.

[0002]

2. Description of the Related Art In a method of sealing an injection port of a liquid crystal display element, after injecting a liquid crystal material between a pair of electrode substrates, the injection port sealing resin is applied to the injection port by a dispenser, and the injection port sealing resin is cured. In general, a method of sealing the injection port by causing the injection port to be sealed.

[0003] When simultaneously filling the injection ports of a plurality of liquid crystal display elements, the liquid crystal display elements are arranged so that the distance between the liquid crystal display elements and the distance between the dispensers are equal to each other. A method is used in which the injection port sealing resin is applied by the same number of dispensers and the injection port sealing resin is cured to seal the injection port.

The thickness of the electrode substrate is 0.7 to 1.1 mm.
In the case of a liquid crystal display element using glass, the width of the end face with the injection port is twice the thickness of the electrode substrate alone since the liquid crystal display element is formed by bonding a pair of electrode substrates. 0.4 to 2.2 mm.

[0005] Therefore, when the injection port is sealed using a dispenser, the injection port sealing resin does not protrude from the end face where the injection port is located, and the injection port can be sealed well. Even when the injection ports of a plurality of liquid crystal display elements are sealed at the same time, the liquid crystal display elements are positioned with positioning pins and the like, and the injection ports are sealed with the same number of dispensers as the liquid crystal display elements, so that a good sealing is achieved. The inlet can be sealed.

Another method is disclosed in Japanese Patent Laid-Open No. 2-130.
As disclosed in Japanese Patent Publication No. 530, an injection port sealing resin coating portion is immersed in the injection port sealing resin, and the injection port sealing resin is scooped and applied to the injection port of the liquid crystal display element. There has been proposed a method of sealing an inlet by curing an inlet sealing resin.

[0007]

In the case of a liquid crystal display element using plastic or thin glass having a thickness of 0.1 to 0.5 mm as an electrode substrate, the width of an end face having an injection port is as follows.
Since the liquid crystal display element is configured by bonding a pair of electrode substrates, the thickness of the electrode substrate is twice as large as 0.2 to 0.2 to
1.0 mm.

For this reason, when the injection port is sealed using a dispenser, as shown in FIG. 7, the injection port sealing resin 70 protrudes from the end face 71 having the injection port, and the display surface 7
2 adheres. The injection port sealing resin 70
When there is a problem, there is a problem that the polarizing plate cannot be attached, and the liquid crystal display element cannot be used as it is. Therefore, an operation such as cutting off an unnecessary portion is required. At this time, there is a problem that the liquid crystal display element may be damaged, resulting in a defective product.

When simultaneously filling the injection ports of a plurality of liquid crystal display elements, there are the following problems in addition to the above problems.

When simultaneously injecting a plurality of liquid crystal display elements using plastic or thin glass as an electrode substrate, a gap control plate made of an elastic material or the like and the liquid crystal display elements are alternately arranged, and the liquid crystal is pressed by applying pressure from the outside. A method of performing injection while controlling the cell gap of a display element is often used. In this method, the gap between the injection ports is varied due to the thickness variation of the gap control plate, the variation in the pressing force, the variation in the thickness of the electrode substrate, and the like. It greatly shifts from a predetermined position for sealing by the dispenser, and it becomes difficult to seal.

On the other hand, in the method disclosed in Japanese Patent Application Laid-Open No. Hei 2-130530, since a plurality of liquid crystal display elements using plastic or thin glass as an electrode substrate are simultaneously injected, a gap control made of an elastic material or the like is required. When the injection is performed while controlling the cell gap of the liquid crystal display element by controlling the cell gap of the liquid crystal display element by applying pressure from the outside by alternately arranging the plate and the liquid crystal display element, the thickness variation of the gap control plate, the variation of the pressing force, and the thickness of the electrode substrate. Even if the gap between the injection ports varies due to the variation or the like, there is no problem.

However, in this method, it is difficult to adjust the coating amount of the injection port sealing resin even in the case of a liquid crystal display element using glass having a thickness of 0.7 to 1.1 mm as an electrode substrate. The inlet sealing resin may protrude from the end face having the inlet and adhere to the display surface.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and it is possible to prevent the injection port sealing resin from protruding from the end face having the injection port and adhering to the display surface. It is an object of the present invention to provide a method of manufacturing a liquid crystal display element and an apparatus for manufacturing a liquid crystal display element, which can cope with variations in the distance between the injection ports when the liquid crystal display elements are simultaneously injected.

[0014]

In order to achieve the above object, a method of manufacturing a liquid crystal display device according to the first aspect of the present invention comprises the steps of: injecting a liquid crystal material between a pair of electrode substrates; In the method for manufacturing a liquid crystal display element in which an injection port is sealed using a sealing resin, the liquid crystal material is injected into an injection port sealing resin absorber which is in a wet state by absorbing the injection port sealing resin. The injection port sealing resin is transferred to the injection port by contacting the injection port of the liquid crystal display element after the contact, and the injection port is sealed.

According to a second aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the first aspect.
In the inlet sealing resin, by immersing at least a part of the portion of the inlet sealing resin absorber that does not come into contact with the inlet, the inlet sealing resin absorber is kept in a wet state. It is characterized by putting.

According to a third aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the first aspect.
The injection port sealing resin absorber is brought into a wet state by bringing a portion of the injection port sealing resin absorber that comes into contact with the injection port into contact with the injection port sealing resin.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the first aspect.
The injection port sealing resin is dropped into a portion of the injection port sealing resin absorber that comes into contact with the injection port, so that the injection port sealing resin absorber is in a wet state.

According to a fifth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the first aspect.
By forming the filler sealing resin absorber in a core material and supplying the filler sealing resin to the filler sealing resin absorber through the core material, the filler sealing resin absorber is provided. In a wet state.

According to a sixth aspect of the present invention, there is provided an apparatus for manufacturing a liquid crystal display element, wherein a liquid crystal material is injected between a pair of electrode substrates, and then the injection port is sealed with an injection port sealing resin. An inlet sealing resin transfer unit comprising an inlet sealing resin absorber which is in a wet state by absorbing the inlet sealing resin; and supplying the inlet sealing resin to the transfer unit. And an inlet sealing resin supply means.

According to the method of manufacturing a liquid crystal display element of the present invention, the liquid crystal display after the liquid crystal material is injected into the injection port sealing resin absorber which is in a wet state by absorbing the injection port sealing resin. By contacting the injection port of the element and transferring the injection port sealing resin to the injection port, an appropriate amount of the injection port sealing resin can be transferred to the injection port. The injection port can be sealed without attaching a stop resin.

Further, in order to simultaneously inject a plurality of liquid crystal display elements using plastic or thin glass as an electrode substrate, a gap control plate made of an elastic material or the like and the liquid crystal display elements are alternately arranged and pressurized from outside. When the injection is performed while controlling the cell gap of the liquid crystal display element, even if the gap between the injection ports is varied due to the thickness variation of the gap control plate, the variation of the pressing force, the variation of the thickness of the electrode substrate, etc., there is no problem. The inlet can be sealed.

In addition, at least a part of the portion of the inlet-sealing resin absorbent that does not come into contact with the inlet is immersed in the inlet-sealing resin to keep the inlet-sealing resin absorbent wet. As a result, an appropriate amount of the injection port sealing resin can always be stably transferred to the injection port, so that the injection port can be sealed without attaching the injection port sealing resin to the display surface of the liquid crystal display element. it can.

Also, by bringing the portion of the inlet sealing resin absorber that comes into contact with the inlet into contact with the inlet sealing resin and bringing the inlet sealing resin absorber into a wet state, an appropriate amount of the resin is always stably provided. Since the injection port sealing resin can be transferred to the injection port, the injection port can be sealed without attaching the injection port sealing resin to the display surface of the liquid crystal display element.

Also, by dropping the injection port sealing resin into a portion of the injection port sealing resin absorbent body which is in contact with the injection port, and keeping the injection port sealing resin absorbent in a wet state, an appropriate amount of the injection port sealing resin absorbent can be always stably obtained. Since the injection port sealing resin can be transferred to the injection port, the injection port can be sealed without attaching the injection port sealing resin to the display surface of the liquid crystal display element.

Further, an inlet sealing resin absorber is formed in the core material, the inlet sealing resin is supplied to the inlet sealing resin absorber through the core material, and the inlet sealing resin absorber is wetted. By setting the state, it is possible to always stably transfer an appropriate amount of the injection port sealing resin to the injection port, so that the injection port sealing resin can be sealed without attaching the injection port sealing resin to the display surface of the liquid crystal display element. It can be performed.

According to the apparatus for manufacturing a liquid crystal display element of the present invention, an inlet sealing resin transfer means comprising an inlet sealing resin absorber which is in a wet state by absorbing the inlet sealing resin; By having an injection port sealing resin supply means for supplying an injection port sealing resin to the transfer means, an appropriate amount of the injection port sealing resin can be transferred to the injection port. The injection port can be sealed without adhering the injection port sealing resin, and an appropriate amount of the injection port sealing resin can always be stably supplied from the supply means to the transfer means. As a result, an appropriate amount of the injection port sealing resin can be transferred to the injection port.

Further, in order to simultaneously inject a plurality of liquid crystal display elements using plastic or thin glass as an electrode substrate, a gap control plate made of an elastic body and the like and the liquid crystal display element are alternately arranged and pressurized from outside. When the injection is performed while controlling the cell gap of the liquid crystal display element, even if the gap between the injection ports is varied due to the thickness variation of the gap control plate, the variation of the pressing force, the variation of the thickness of the electrode substrate, etc., there is no problem. The inlet can be sealed.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

(Embodiment 1) A first embodiment will be described with reference to FIGS. FIG. 1 is a conceptual diagram showing a first embodiment of a liquid crystal display device manufacturing apparatus according to the present invention, and FIG. 2 is an explanatory diagram showing a case where a gap control plate is used in the first embodiment.

As shown in FIG. 1A, an injection port sealing resin 2 made of an acrylic photocurable resin is stored in a resin tank 1 made of stainless steel as an injection port sealing resin supply means. An inlet sealing resin absorber 3 as an inlet sealing resin transferring means is formed around the core material 4 and at least a part of the inlet sealing resin absorber 3 which is not in contact with the inlet 5 is sealed with the inlet. The immersion resin 2 is immersed in the sealing resin 2 so that the injection port sealing resin absorber 3 absorbs the injection port sealing resin 2 to be in a wet state.

The filler sealing resin absorber 3 can be made of felt, sponge, absorbent cotton, gauze or the like, and is not particularly limited as long as it can absorb the filler sealing resin 2, but is used in a clean room. Made by Asahi Kasei
MCOT or a Kimwipe manufactured by Jujo Kimberly is preferred.

Next, as shown in FIG. 1B, the injection port sealing resin absorber 3 is raised, and a pair of electrode substrates are bonded to each other to inject the liquid crystal material into the liquid crystal display element 6. After being brought into contact with the inlet 5, as shown in FIG. 1 (c), the inlet sealing resin absorber 3 is lowered to transfer the inlet sealing resin 2 to the inlet 5, and by irradiating ultraviolet rays. The injection port sealing resin 2 is cured, and the sealing of the injection port 5 is completed.

Since an appropriate amount of the injection port sealing resin 2 can be transferred from the injection port sealing resin absorber 3 to the injection port 5, the excess injection port sealing resin 2 is removed from the display surface of the liquid crystal display element 6. Does not adhere to

When the electrode substrate of the liquid crystal display element 6 is made of thin glass or plastic, as shown in FIG. 2, the liquid crystal display element 6 is sandwiched by the gap control plate 7, and the injection port is kept pressed from the outside. Is performed.

Since the inlet sealing resin absorber 3 has a rod-like shape irrespective of the distance between the inlets, the thickness of the gap control plate 7, the applied pressure, the thickness of the electrode substrate, etc. Even if the distance between the inlets in the X direction varies, the inlet can be sealed without any problem.

(Embodiment 2) A second embodiment will be described with reference to FIG. FIG. 3 is a conceptual diagram showing a second embodiment of the liquid crystal display device of the present invention.

First, as shown in FIG. 3A, a resin tank 1 made of stainless steel as an inlet sealing resin supply means.
Is filled with an injection port sealing resin 2 made of an acrylic photocurable resin, and comes into contact with the injection port 5 of the injection port sealing resin absorber 3 as an injection port sealing resin transfer means formed on the core material 4. 3 is brought into contact with the inlet sealing resin 2, and as shown in FIG. 3B, the inlet sealing resin absorber 3 is raised, and the inlet sealing resin absorber 3 is attached to the inlet sealing resin absorber 3. To make it wet.

Next, as shown in FIG. 3C, the core material 4 is rotated so that the injection port sealing resin absorber 3 is directed toward the injection port 5,
As shown in FIG. 3D, the inlet sealing resin absorber 3 is raised and brought into contact with the inlet 5, and as shown in FIG. 3E, the inlet sealing resin absorber 3 is removed. The injection port sealing resin 2 is transferred to the injection port 5 by lowering, and the injection port sealing resin 2 is cured by irradiating ultraviolet rays, and the sealing of the injection port 5 is completed.

In preparation for the sealing of the injection port 5 of the next liquid crystal display element 6, the core material 4 is rotated to direct the injection port sealing resin absorber 3 toward the resin tank 1 as shown in FIG. Wait.

Since an appropriate amount of the injection port sealing resin 2 can be transferred from the injection port sealing resin absorber 3 to the injection port 5, the surplus injection port sealing resin 2 is transferred to the display surface of the liquid crystal display element 6. Does not adhere to

When the liquid crystal display element 6 is sandwiched between the gap control plates and the injection port 5 is sealed while being pressed from the outside, the injection port sealing resin absorber 3 is provided between the injection ports 5. Since it has a rod shape irrespective of the gap, even if there is a variation in the gap between the injection ports 5 due to variations in the thickness of the gap control plate, variations in the pressing force, variations in the thickness of the electrode substrate, etc. Sealing can be performed.

(Embodiment 3) A third embodiment will be described with reference to FIG. FIG. 4 is a conceptual diagram showing a third embodiment of the apparatus for manufacturing a liquid crystal display element according to the present invention.

As shown in FIGS. 4A and 4B,
Using the dispenser 8 as the injection port sealing resin supply means, the injection port sealing resin 2 made of an acrylic photocurable resin is formed on the core material 4 and the injection port sealing resin as the injection port sealing resin transfer means. Dropping is performed while scanning over the portion of the resin stopper 3 that is in contact with the injection port 5, and the injection port sealing resin 2 is absorbed by the injection port sealing resin absorber 3 to be in a wet state.

Next, as shown in FIG. 4C, the inlet-sealing resin absorber 3 is moved below the inlet, and as shown in FIG. 3 is raised and brought into contact with the injection port, and as shown in FIG. 4 (e), the injection port sealing resin absorber 3 is lowered to transfer the injection port sealing resin 2 to the injection port. The injection port sealing resin 2 is cured by irradiation, and the sealing of the injection port is completed.

Since an appropriate amount of the injection port sealing resin 2 can be transferred from the injection port sealing resin absorber 3 to the injection port,
Excess injection port sealing resin 2 does not adhere to the display surface of liquid crystal display element 6.

The liquid crystal display element 6 is connected to the gap control plate 7
In the case where the injection port is sealed while pressurized from the outside and the injection port is sealed, the injection port sealing resin absorber 3 has a rod-like shape irrespective of the interval between the injection ports. Even if there is a variation in the interval between the injection ports due to a variation in the plate thickness, a variation in the pressing force, a variation in the thickness of the electrode substrate, or the like, the injection port can be sealed without any problem.

(Fourth Embodiment) A fourth embodiment will be described with reference to FIGS. FIG. 5 is a conceptual diagram showing a fourth embodiment relating to a device for manufacturing a liquid crystal display element of the present invention, and FIG. 6 is a perspective view showing a core material in the fourth embodiment.

As shown in FIG. 5A, an inlet sealing resin made of an acrylic photocurable resin is passed through a pipe 9 from a liquid feed tank into a core material 4 as an inlet sealing resin supply means. Is supplied through a hole provided in the core material 4 to the injection port sealing resin absorber 3 serving as an injection port sealing resin transfer means formed in the core material 4. The sealing resin is absorbed by the resin stopper 3 so as to be in a wet state.

As shown in FIG. 6, the core member 4 is preferably provided with a slit 10 or a plurality of circular holes on the surface on which the inlet sealing resin absorber is formed. It is sufficient that the inlet sealing resin supplied through the inlet can be evenly absorbed by the inlet sealing resin absorber,
In particular, the shape is not limited.

Next, as shown in FIG. 5 (b), the injection port sealing resin absorber 3 is raised and brought into contact with the injection port, and then, as shown in FIG. 5 (c), the injection port sealing is performed. The resin absorber 3 is lowered, the injection port sealing resin 2 is transferred to the injection port, and the injection port sealing resin 2 is cured by irradiating ultraviolet rays to complete the sealing of the injection port.

Since an appropriate amount of the injection port sealing resin 2 can be transferred from the injection port sealing resin absorber 3 to the injection port,
Excess injection port sealing resin 2 does not adhere to the display surface of liquid crystal display element 6.

The liquid crystal display element 6 is connected to the gap control plate 7
In the case where the injection port is sealed while pressurized from the outside and the injection port is sealed, the injection port sealing resin absorber 3 has a rod-like shape irrespective of the interval between the injection ports. Even if there is a variation in the interval between the injection ports due to a variation in the plate thickness, a variation in the pressing force, a variation in the thickness of the electrode substrate, or the like, the injection port can be sealed without any problem.

[0053]

As described above, according to the method for manufacturing a liquid crystal display element of the present invention, the injection port sealing resin absorber which is in a wet state by absorbing the injection port sealing resin is provided. The injection port of the liquid crystal display element after injecting the liquid crystal material is brought into contact with the injection port sealing resin, and the injection port sealing resin is transferred to the injection port, so that the injection port sealing resin does not adhere to the display surface of the liquid crystal display element. Since it is possible to seal the liquid crystal display element, it is not necessary to perform operations such as scraping off the injection port sealing resin adhered to unnecessary portions. There will be no rejects.

Further, in order to simultaneously inject a plurality of liquid crystal display elements using plastic or thin glass as an electrode substrate, a gap control plate made of an elastic body and the like and the liquid crystal display elements are alternately arranged and pressurized from outside. When the injection is performed while controlling the cell gap of the liquid crystal display element, even if the gap between the injection ports is varied due to the thickness variation of the gap control plate, the variation of the pressing force, the variation of the thickness of the electrode substrate, etc., there is no problem. The inlet can be sealed.

Further, at least a part of the portion of the injection port sealing resin absorber that does not come into contact with the injection port is immersed in the injection port sealing resin to keep the injection port sealing resin absorbent in a wet state. Accordingly, the effect of sealing the injection port without adhering the injection port sealing resin to the display surface of the liquid crystal display element can be always stably obtained.

Further, by bringing the portion of the injection port sealing resin absorber that is in contact with the injection port into contact with the injection port sealing resin, and bringing the injection port sealing resin absorber into a wet state, the display surface of the liquid crystal display element can be obtained. The effect obtained by sealing the injection port without adhering the injection port sealing resin to the nozzle can always be stably obtained.

Further, the injection port sealing resin is dropped on a portion of the injection port sealing resin absorbent body which is in contact with the injection port, and the injection port sealing resin absorber is wetted, so that the display surface of the liquid crystal display element is formed. The effect obtained by sealing the injection port without adhering the injection port sealing resin to the nozzle can always be stably obtained.

Further, an inlet sealing resin absorber is formed in the core material, the inlet sealing resin is supplied to the inlet sealing resin absorber through the core material, and the inlet sealing resin absorber is wetted. By setting the state, the effect of sealing the injection port without adhering the injection port sealing resin to the display surface of the liquid crystal display element can be always stably obtained.

According to the apparatus for manufacturing a liquid crystal display element of the present invention, an inlet sealing resin transfer means comprising an inlet sealing resin absorber which is in a wet state by absorbing the inlet sealing resin; By having an injection port sealing resin supply means for supplying an injection port sealing resin to the transfer means, the injection port can be sealed without attaching the injection port sealing resin to the display surface of the liquid crystal display element. Therefore, there is no need to perform operations such as scraping the injection port sealing resin adhered to unnecessary portions, and the work of scraping the injection port sealing resin may damage the liquid crystal display element and result in a defective product. Disappears.

Further, in order to simultaneously inject a plurality of liquid crystal display elements using plastic or thin glass as an electrode substrate, a gap control plate made of an elastic body and the like and the liquid crystal display elements are alternately arranged and pressurized from outside. When the injection is performed while controlling the cell gap of the liquid crystal display element, even if the gap between the injection ports is varied due to the thickness variation of the gap control plate, the variation of the pressing force, the variation of the thickness of the electrode substrate, etc., there is no problem. The inlet can be sealed.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of an apparatus for manufacturing a liquid crystal display element according to the present invention.
It is a key map showing an embodiment.

FIG. 2 is an explanatory diagram showing a case where a gap control plate is used in the first embodiment.

FIG. 3 is a second view related to the liquid crystal display device manufacturing apparatus of the present invention.
It is a key map showing an embodiment.

FIG. 4 is a third view related to the liquid crystal display device manufacturing apparatus of the present invention.
It is a key map showing an embodiment.

FIG. 5 shows a fourth embodiment of the liquid crystal display device manufacturing apparatus according to the present invention.
It is a key map showing an embodiment.

FIG. 6 is a perspective view showing a core material according to a fourth embodiment.

FIG. 7 is a perspective view showing a liquid crystal display element in which an injection port is sealed by a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Resin tank 2 Injection sealing resin 3 Injection sealing resin absorber 4 Core material 5 Injection 6 Liquid crystal display element 7 Gap control plate 8 Dispenser 9 Tube 10 Slit 70 Injection sealing resin 71 End face with inlet 72 Display surface

Claims (6)

(57) [Claims] In a method for manufacturing a liquid crystal display element, in which a liquid crystal material is injected between a pair of electrode substrates and then the injection port is sealed using an injection port sealing resin, the injection port sealing resin is absorbed. By bringing the injection port sealing resin absorber in a wet state into contact with the injection port of the liquid crystal display element after injecting the liquid crystal material, the injection port sealing resin is transferred to the injection port, A method for manufacturing a liquid crystal display element, wherein the injection port is sealed. 2. The injection port sealing resin absorbent body is immersed in at least a part of a portion of the injection port sealing resin absorbent body that is not in contact with the injection port, so that the injection port sealing resin absorbent body is 2. The method according to claim 1, wherein the liquid crystal display element is kept in a wet state. 3. A method of bringing a portion of the inlet sealing resin absorber in contact with the inlet into contact with the inlet sealing resin to bring the inlet sealing resin absorber into a wet state. The method for manufacturing a liquid crystal display element according to claim 1, wherein 4. A method for dropping the injection port sealing resin onto a portion of the injection port sealing resin absorbent body which is in contact with the injection port to bring the injection port sealing resin absorber into a wet state. The method for manufacturing a liquid crystal display element according to claim 1, wherein 5. The injection port sealing resin absorber is formed in a core material, and the injection port sealing resin is supplied to the injection port sealing resin absorber through the core material to thereby form the injection port sealing resin absorber. 2. The method for manufacturing a liquid crystal display device according to claim 1, wherein the sealing resin absorber is in a wet state. 6. An apparatus for manufacturing a liquid crystal display element for injecting a liquid crystal material between a pair of electrode substrates and then sealing the injection port with an injection port sealing resin, wherein the injection port sealing resin is absorbed. An inlet sealing resin transfer unit comprising an inlet sealing resin absorber in a wet state, and an inlet sealing resin supply unit for supplying the inlet sealing resin to the transfer unit. Characteristic device for manufacturing liquid crystal display elements.