JP2002341357A - Manufacturing method and manufacturing apparatus for liquid crystal display device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent an elastic body interposed between a surface plate and a substrate from being crushed in all directions and causing a gap defect. SOLUTION: An upper surface plate 1 and a lower surface plate 2 provided with a plate-like elastic body 5 are provided, and at least one of substrates for applying a sealing material 6 and dispersing spacer particles 7 or forming projections. The two substrates 3 and 4 are aligned with each other in such a manner that each of the substrates 3 and 4 is vacuum-adsorbed to the upper surface plate 1 and the lower surface plate 2 one by one. This is an apparatus for manufacturing a liquid crystal display device capable of bonding substrates 3 and 4 by applying pressure, wherein suction holes 51 of elastic body 5 are provided to be inclined with respect to the thickness direction of the elastic body. Thereby, the direction in which the elastic body 5 is crushed can be controlled, and the pressure applied to the panel at the time of bonding can be made uniform.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for manufacturing a liquid crystal display.

[0002]

2. Description of the Related Art As a method of manufacturing a liquid crystal display device, the following two methods are practically used. First, the first method is a vacuum injection method. As shown in FIG. 6, two substrates 3 and 4 are adhered to one of the two substrates 3 and 4, and a sealing material 6 for sealing a liquid crystal material is further provided with one or several cuts. To form a pattern. Further, spacer particles 7 or projections for holding the cell gap at a predetermined value are formed on one of the two substrates 3 and 4. These two substrates 3 and 4 are vacuum-adsorbed to the upper surface plate 1 and the lower surface plate 2, respectively.
After bonding in air pressure, the sealing material 6 is cured to form an empty cell. Next, a liquid crystal material is injected into this empty cell from one or several cuts (injection ports) of the sealing material 6 provided in advance in a vacuum chamber, and then the injection port is sealed with a sealing material. To assemble the liquid crystal display.

[0003] The second method is a dropping method. The two substrates are bonded to one of the two substrates, and a sealing material for sealing the liquid crystal material is formed in a pattern without cutting. In addition, spacer particles or protrusions for holding the cell gap at a predetermined value are formed on one of the two substrates. Further, a predetermined amount of a liquid crystal material is dropped on one of the two substrates. After these two substrates are vacuum-sucked on the upper and lower plates, they are bonded together in a vacuum chamber and then the sealing material is cured to assemble a liquid crystal display device.

The cell gap accuracy required for a liquid crystal display device is generally ± 0.3 μm or less for a TN liquid crystal display device,
In the case of N liquid crystal display devices, it is ± 0.05 μm or less.
We can expect only degree. Therefore, it is impossible to pressurize the upper and lower substrates uniformly with the liquid crystal display device bonding method of the injection method, and in order to obtain the required cell gap accuracy, the above-described bonding was performed and separately prepared. It was necessary to press the upper and lower substrates uniformly using a pressing machine to crush the sealing resin by a predetermined amount. Therefore, by installing an elastic body between the lower surface plate and the lower substrate at the time of bonding,
In the bonding step, it is possible to simultaneously press the substrate uniformly and crush the sealing resin by a predetermined amount.

At this time, it is necessary to fix the upper and lower substrates by vacuum suction so that the alignment between the upper and lower substrates does not shift. For this purpose, a vacuum suction hole is formed in an elastic body provided between the lower substrate and the lower surface plate. Need to be kept.

[0006]

However, since the suction hole of the elastic body has an irregular inclination with respect to the surface of the elastic body, the elastic body is crushed in all directions at the time of bonding, resulting in a lack of uniformity. There is a problem that unevenness occurs in the panel, a gap failure occurs in the panel after assembly, and the panel quality is remarkably deteriorated.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method and a method for manufacturing a liquid crystal display device in which an elastic body interposed between a surface plate and a substrate is prevented from being crushed in all directions at the time of bonding substrates, thereby preventing a gap defect from occurring. It is to provide a device.

[0008]

According to a first aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, comprising: applying a sealant for bonding two substrates; Spraying of spacer particles or formation of protrusions for forming a gap between the two substrates was performed on at least one of the substrates, and the two substrates were vacuum-adsorbed one by one to perform alignment. Thereafter, a method for manufacturing a liquid crystal display device in which the substrates are attached to each other, wherein, when the substrates are vacuum-sucked, one of the substrates is brought into contact with an elastic body, and is provided inclined with respect to the elastic body thickness direction. Vacuum suction is performed by the suction holes of the elastic body.

As described above, the application of the sealing material for bonding the two substrates and the dispersion of the spacer particles or the formation of the protrusions for forming the gap between the two substrates are performed on at least one of the substrates. In the injection method of bonding the substrates to form an empty cell, one of the substrates is brought into contact with the elastic body when the substrate is vacuum-sucked, and is provided inclined with respect to the elastic body thickness direction. Since the vacuum suction is performed by the suction hole of the elastic body, the direction in which the elastic body is crushed can be controlled, and the pressure applied to the panel at the time of bonding can be made uniform. That is, since the elastic body is crushed in the direction in which the suction hole is inclined, the crushing direction of the elastic body can be controlled in advance so that the pressure on the panel is uniform, and no gap failure occurs in the panel after assembly. .

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.
The suction holes of the elastic body are inclined in the same direction. As described above, since the suction holes of the elastic body are inclined in the same direction, the collapse direction near the suction holes of the elastic body is constant.

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 suction holes of the elastic body are inclined at least 3 degrees with respect to the thickness direction of the elastic body. As described above, since the suction holes of the elastic body are inclined at least three degrees with respect to the thickness direction of the elastic body, the direction in which the elastic body is crushed can be reliably controlled, and the cell gap failure is improved.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, comprising: applying a sealing material for bonding two substrates;
Dispersing or forming projections of spacer particles for forming a gap between two substrates, and dropping a predetermined amount of liquid crystal material onto at least one of the substrates;
A step of vacuum-suctioning the two substrates one by one, a step of maintaining the atmosphere including the two substrates at a degree of vacuum lower than the vacuum suction of the substrates, and a constant distance between the two substrates A method of manufacturing a liquid crystal display device, comprising: a step of performing alignment by performing the alignment; and, after the alignment is completed, a step of pressing the two substrates, crushing the sealant, and bonding the substrates together. When vacuum suction is performed, one of the substrates is brought into contact with the elastic body, and vacuum suction is performed using the suction holes of the elastic body that are provided to be inclined with respect to the thickness direction of the elastic body.

As described above, the application of the sealant for bonding the two substrates, the dispersion or formation of the projections of the spacer particles for forming the gap between the two substrates, the formation of the predetermined amount of the liquid crystal material, and the like. Dropping is performed on at least one substrate, and in a dropping method in which two substrates are vacuum-adsorbed one by one, when one of the substrates is vacuum-adsorbed, one of the substrates is brought into contact with an elastic body. Since vacuum suction is performed by the suction holes of the elastic body provided at an angle with respect to the thickness direction of the elastic body, the direction in which the elastic body is crushed can be controlled, and the pressure applied to the panel during bonding can be uniform. . That is, since the elastic body is crushed in the direction in which the suction hole is inclined, the crushing direction of the elastic body can be controlled in advance so that the pressure on the panel is uniform, and no gap failure occurs in the panel after assembly. .

According to a fifth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the fourth aspect.
The suction holes of the elastic body are inclined in the same direction. As described above, since the suction holes of the elastic body are inclined in the same direction, the collapse direction near the suction holes of the elastic body is constant.

According to a sixth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the fourth aspect.
The suction holes of the elastic body are inclined at least 3 degrees with respect to the thickness direction of the elastic body. As described above, since the suction holes of the elastic body are inclined at least three degrees with respect to the thickness direction of the elastic body, the direction in which the elastic body is crushed can be reliably controlled, and the cell gap failure is improved.

According to a seventh aspect of the present invention, there is provided an apparatus for manufacturing a liquid crystal display device, comprising: an upper surface plate; and a lower surface plate on which a plate-like elastic body is installed. The formation is performed on at least one of the two substrates, and the two substrates are aligned with each other while being vacuum-adsorbed to the upper surface plate and the lower surface plate one by one. A manufacturing apparatus for a liquid crystal display device capable of bonding substrates by pressurizing the elastic body, wherein the suction holes of the elastic body are provided to be inclined with respect to the thickness direction of the elastic body.

As described above, the upper surface plate and the lower surface plate provided with the plate-like elastic body are provided, and the application of the sealing material and the dispersion of the spacer particles or the formation of the projections are performed on at least one of the substrates. In the injection method, two substrates are bonded to each other on the upper surface plate and the lower surface plate by vacuum, and then the substrates are bonded together to form an empty cell. Since it is provided to be inclined with respect to the body thickness direction, it is possible to control the direction in which the elastic body is crushed, and to evenly apply pressure to the panel during bonding.

The manufacturing apparatus for a liquid crystal display device according to claim 8 is the manufacturing apparatus for a liquid crystal display device according to claim 7,
The suction holes of the elastic body are inclined in the same direction. As described above, since the suction holes of the elastic body are inclined in the same direction, the collapse direction near the suction holes of the elastic body is constant.

According to a ninth aspect of the present invention, there is provided an apparatus for manufacturing a liquid crystal display device according to the seventh aspect.
The suction holes of the elastic body are inclined at least 3 degrees with respect to the thickness direction of the elastic body. As described above, since the suction holes of the elastic body are inclined at least three degrees with respect to the thickness direction of the elastic body, the direction in which the elastic body is crushed can be reliably controlled, and the cell gap failure is improved.

According to a tenth aspect of the present invention, there is provided an apparatus for manufacturing a liquid crystal display device, comprising: an upper surface plate; a lower surface plate on which a plate-like elastic body is installed;
A chamber having the upper surface plate and the lower surface plate installed therein, and application of a sealing material, dispersion of spacer particles or formation of protrusions, and dropping of a predetermined amount of liquid crystal material onto at least one substrate. While the two substrates performed on the upper surface plate and the lower surface plate are vacuum-adsorbed one by one, and the inside of the chamber is kept at a vacuum degree lower than the vacuum degree at which the substrates are adsorbed, An apparatus for manufacturing a liquid crystal display device capable of performing alignment while keeping a distance between two substrates at a fixed distance, pressing the upper and lower substrates by the both surface plates, crushing the sealing material and bonding the substrates together. Wherein the suction hole of the elastic body is provided to be inclined with respect to the thickness direction of the elastic body.

As described above, the apparatus includes the upper surface plate, the lower surface plate on which the plate-shaped elastic body is installed, and the chamber in which the upper surface plate and the lower surface plate are installed. The spraying of spacer particles or the formation of projections and the dropping of a predetermined amount of liquid crystal material were performed on at least one of the substrates, and the two substrates were vacuum-adsorbed one by one to the upper surface plate and the lower surface plate, respectively. In the device of the dropping method to be manufactured, the direction in which the elastic body is crushed can be controlled, and the pressure applied to the panel at the time of bonding can be made uniform.

According to an eleventh aspect of the present invention, in the manufacturing apparatus of the tenth aspect, the suction holes of the elastic body are inclined in the same direction. As described above, in the liquid crystal display device manufacturing apparatus, since the suction holes of the elastic body are inclined in the same direction, the collapse direction near the suction hole of the elastic body is constant.

According to a twelfth aspect of the present invention, there is provided the liquid crystal display device manufacturing apparatus according to the tenth aspect, wherein the suction holes of the elastic body are inclined at least 3 degrees with respect to the thickness direction of the elastic body. As described above, since the suction holes of the elastic body are inclined at least three degrees with respect to the thickness direction of the elastic body, the direction in which the elastic body is crushed can be reliably controlled, and the cell gap failure is improved.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram of an apparatus for manufacturing a liquid crystal display device according to a first embodiment of the present invention, FIG. 2 is a plan view schematically showing an elastic body according to the embodiment of the present invention, and FIG. It is a top view which shows the outline of the lower surface plate in a form.

As shown in FIGS. 1 to 3, the manufacturing apparatus for a liquid crystal display device includes an upper surface plate 1 and a lower surface plate 2 on which a plate-like elastic body 5 is installed. 2) At least one of the substrates 3 and 4 subjected to the application of 6 and the spraying of the spacer particles 7 or the formation of the projections is vacuumed on each of the upper platen 1 and the lower platen 2. Alignment is performed in a state where the substrates are adsorbed, and the upper and lower substrates 3 and 4 are pressed by both the platens 1 and 2 to bond the substrates. Further, the vacuum suction holes 51 of the elastic body 5 are provided to be inclined with respect to the thickness direction of the elastic body. In this case, the lower surface plate 2 is provided with a suction groove 21 communicating with the vacuum suction hole 51.

Next, a method of manufacturing a liquid crystal display device will be described. First, an array substrate and a color filter substrate formed by a general method are prepared, and each substrate is washed,
An alignment film made of polyimide was formed, cured, and subjected to a predetermined rubbing treatment.

Next, resin spacer particles 7 having a particle size of 4.5 μm are sprayed on the array substrate side, and an ultraviolet-curing type sealing resin 6 mixed with a glass fiber having a diameter of 5.5 μm is screened on the color filter side. A pattern was formed using a printing method. At this time, a pattern having an inlet was formed on the color filter substrate.

Using these array substrate and color filter substrate, bonding was performed as follows.

The elastic body 5 was inserted between the lower platen 2 and the lower substrate 4 of the bonding apparatus to perform bonding. The elastic body 5 was prepared from a silicone rubber material.

After the color filter substrate is vacuum-adsorbed to the lower platen 2 via the elastic body 5 previously prepared and the array substrate is vacuum-adsorbed to the upper platen 1 respectively, the upper and lower substrates 3 and 4 are aligned. Laminate 3, 4
And pressurized with 1.5 tons to sufficiently crush the sealing resin 6. At this time, as shown in FIG.
The suction holes of the elastic body 5 used in (1) were opened perpendicularly to the surface of the elastic body (in the thickness direction of the elastic body), and as shown in FIGS. 4B to 4D, the set b, set c, and set d Were used at intervals of 2, 3 and 4 degrees with respect to the thickness direction of the elastic body, respectively.

Next, the bonded substrate set a, set b, set c and set d were taken out of the bonding apparatus, and the sealing resin 6 was cured by irradiation with ultraviolet rays.

After cutting the peripheral portions of the bonded substrates of set a, set b, set c and set d,
A liquid crystal material was filled using a vacuum injection method, and the injection port was sealed to form a liquid crystal display device.

A second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a schematic view of an apparatus for manufacturing a liquid crystal display device according to the second embodiment of the present invention.

As shown in FIG. 5, this liquid crystal display device manufacturing apparatus comprises an upper surface plate 1, a lower surface plate 2 on which a plate-like elastic body 5 is installed, an upper surface plate 1, and a lower surface plate 2. And a chamber 9 in which the sealing material 6 is applied, the spacer particles 7 are scattered or projections are formed, and a predetermined amount of the liquid crystal material 8 is dropped on at least one of the substrates. The substrates 3 and 4 are vacuum-adsorbed one by one on the upper surface plate 1 and the lower surface plate 2, and the two substrates are held in a state where the chamber 9 is maintained at a vacuum lower than the vacuum for suctioning the substrates. Alignment is performed while maintaining the distance between the substrates 3 and 4 at a fixed distance, and the upper and lower substrates 3 and 4 are pressed by the two stools 1 and 2 to crush the sealing material 6 and bond the substrates. Also, the elastic body 5
The vacuum suction holes 51 are provided to be inclined with respect to the elastic body thickness direction.

Next, a method of manufacturing a liquid crystal display device will be described. First, an array substrate and a color filter substrate formed by a general method as in the first embodiment are prepared.
Each substrate was subjected to washing, formation of an alignment film made of polyimide, curing, and predetermined rubbing treatment.

Next, resin spacer particles 7 having a particle size of 4.5 μm are sprayed on the array substrate side, and an ultraviolet-curable sealing resin 6 mixed with glass fibers having a diameter of 5.5 μm is screened on the color filter side. A pattern was formed using a printing method. At this time, a pattern having no injection port was formed on the color filter substrate.

Using these array substrate and color filter substrate, bonding was performed as follows.

After the liquid crystal material 8 was dropped on the color filter substrate in advance, the bonding was performed. As in the first embodiment, the elastic body 5 was inserted between the lower platen 2 and the lower substrate 4 of the bonding apparatus to perform bonding.

The color filter substrate on which the liquid crystal material 8 has been dropped in advance is vacuum-sucked to the lower platen 2 and the array substrate to the upper platen 1 via the elastic body 5, respectively. 5 × 133.322 to 1.0 × 133.32
The evacuation was performed until the pressure became 2 Pa (0.5 to 1.0 torr). At this time, the degree of vacuum of vacuum suction by the upper and lower stools 1 and 2 is 0.1 × 133.322 Pa (0.1 torr).
r) below.

After positioning the upper and lower substrates 3 and 4 while holding the inside of the vacuum chamber 9 at the above-mentioned degree of vacuum, the upper and lower substrates 3 and 4 are bonded to each other. The sealing resin 6 was sufficiently crushed by pressurizing with a ton. At this time, the suction holes of the elastic body 5 used in the set e were opened perpendicularly to the surface of the elastic body, and the set f, set g, and set h were opened at an angle of 2, 3, and 4 degrees. It was used. The shapes of the elastic bodies 5 of the sets e to h correspond to FIGS. 4A to 4D of the first embodiment, respectively.

Next, the bonded substrate set e, set f, set g, and set h are taken out of the bonding apparatus, the sealing resin 6 is cured by ultraviolet irradiation, and the peripheral portion of the substrate is cut. , A liquid crystal display device was created.

As a comparative example, an array substrate and a color filter substrate were formed in the same manner as in the first embodiment, and were bonded as follows.

That is, this set i was bonded using a conventional manufacturing method. As shown in FIG. 6, the color filter substrate is placed on the lower platen 2 and the array substrate is placed on the upper platen 1.
And the upper and lower substrates 3 and 4 (array substrate, color filter substrate) were aligned, and then the upper and lower substrates 3 and 4 were bonded.

Next, the bonded substrate set i
Was taken out of the bonding apparatus, vacuum-packed, and the seal resin 6 was crushed, and then the seal resin 6 was cured by ultraviolet irradiation.

The cell gap measurement (100 points in the plane) of the liquid crystal display devices of the sets a to i prepared as described above was performed. Further, peripheral circuits were mounted, panel display was performed, and a visual evaluation of display uniformity was performed. Table 1 shows these results.
Shown in

[0046]

[Table 1]

As is clear from Table 1, the cell gap defect is improved by forming the suction holes of the elastic body at an angle of 3 degrees or more with respect to the thickness direction of the elastic body.

[0048]

According to the method of manufacturing a liquid crystal display device according to the first aspect of the present invention, it is possible to apply a sealing material for bonding two substrates and to form a gap between the two substrates. Spraying spacer particles or forming projections on at least one of the substrates, and bonding the substrates together to form an empty cell, when vacuum-adsorbing the substrates,
One of the substrates is brought into contact with the elastic body, and vacuum suction is performed by the suction hole of the elastic body provided at an angle with respect to the thickness direction of the elastic body. The pressure applied to the panel can be made uniform. In other words, the elastic body collapses in the direction in which the suction holes are inclined,
The crushing direction of the elastic body can be controlled in advance so that the pressure applied to the panel becomes uniform, so that a gap defect does not occur in the panel after assembly. Therefore, a liquid crystal display device having a uniform cell gap and high display quality can be manufactured.

In the second aspect, since the suction holes of the elastic body are inclined in the same direction, the crushing direction near the suction holes of the elastic body is constant.

According to the third aspect, since the suction holes of the elastic body are inclined at least three degrees with respect to the thickness direction of the elastic body, the direction in which the elastic body is crushed can be reliably controlled, and the cell gap defect is improved.

According to the method of manufacturing a liquid crystal display device according to the fourth aspect of the present invention, application of a sealing material for bonding two substrates and spacer particles for forming a gap between the two substrates. Spraying or forming a projection and dropping a predetermined amount of liquid crystal material on at least one of the substrates.
In the dropping method in which one substrate is vacuum-adsorbed and manufactured one by one, when the substrate is vacuum-adsorbed, one of the substrates is brought into contact with the elastic body and is provided to be inclined with respect to the elastic body thickness direction. Since the vacuum suction is performed by the suction hole of the elastic body, the direction in which the elastic body is crushed can be controlled, and the pressure applied to the panel at the time of bonding can be made uniform. That is, since the elastic body is crushed in the direction in which the suction hole is inclined, the crushing direction of the elastic body can be controlled in advance so that the pressure on the panel is uniform, and no gap failure occurs in the panel after assembly. . Therefore, a liquid crystal display device having a uniform cell gap and high display quality can be manufactured.

In the fifth aspect, since the suction holes of the elastic body are inclined in the same direction, the crushing direction near the suction holes of the elastic body becomes constant.

In the sixth aspect, since the suction holes of the elastic body are inclined at least 3 degrees with respect to the thickness direction of the elastic body, the direction in which the elastic body is crushed can be reliably controlled, and the cell gap defect is improved.

According to a seventh aspect of the present invention, there is provided an apparatus for manufacturing a liquid crystal display device, comprising: an upper surface plate; a lower surface plate on which a plate-like elastic body is provided; Spraying or forming projections on at least one of the substrates is performed, and the two substrates are vacuum-adsorbed one by one to the upper surface plate and the lower surface plate, respectively, and the substrates are bonded to form an empty cell. Since the suction holes of the elastic body are provided inclined with respect to the thickness direction of the elastic body, the direction of the collapse of the elastic body is controlled, and the pressure on the panel at the time of bonding is evenly distributed. Thus, a liquid crystal display device with a uniform cell gap and high display quality can be manufactured.

In the eighth aspect, since the suction holes of the elastic body are inclined in the same direction, the crushing direction near the suction holes of the elastic body becomes constant.

In the ninth aspect, since the suction hole of the elastic body is inclined at least 3 degrees with respect to the thickness direction of the elastic body, the crushing direction of the elastic body can be reliably controlled, and the cell gap defect is improved.

According to the apparatus for manufacturing a liquid crystal display device according to the tenth aspect of the present invention, the upper surface plate, the lower surface plate provided with the plate-like elastic body, and the upper surface plate and the lower surface plate are internally provided. A chamber installed in the chamber, applying a sealing material, spraying spacer particles or forming protrusions, and dropping a predetermined amount of liquid crystal material,
In an apparatus of a dropping method in which at least one substrate is vacuum-adsorbed to each of two substrates on an upper surface plate and a lower surface plate one by one, the crushing direction of the elastic body is controlled and bonded. The pressure applied to the panel at the time can be made uniform, and a liquid crystal display device with a uniform cell gap and high display quality can be manufactured.

According to the eleventh aspect, in the manufacturing apparatus of the liquid crystal display device, since the suction holes of the elastic body are inclined in the same direction, the collapse direction near the suction hole of the elastic body is constant.

In the twelfth aspect, since the suction holes of the elastic body are inclined at least three degrees with respect to the thickness direction of the elastic body, the direction in which the elastic body is crushed can be reliably controlled, and the cell gap failure is improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an apparatus for manufacturing a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a plan view schematically showing an elastic body according to the embodiment of the present invention.

FIG. 3 is a plan view schematically showing a lower surface plate according to the embodiment of the present invention.

FIG. 4 is a schematic diagram showing each elastic body suction hole of the liquid crystal display device by angle.

FIG. 5 is a schematic diagram of an apparatus for manufacturing a liquid crystal display device according to a second embodiment of the present invention.

FIG. 6 is a schematic diagram showing a case where a method of manufacturing a conventional liquid crystal display device is applied to a vacuum injection method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper surface plate 2 Lower surface plate 21 Adsorption groove of lower surface plate 3 Upper substrate 4 Lower substrate 5 Elastic body 51 Elastic body adsorption hole 6 Seal resin 7 Spacer particle 8 Liquid crystal material 9 Vacuum chamber

Continuation of the front page (72) Inventor Satoshi Yamada 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 2H088 FA01 FA09 FA17 FA30 2H089 NA22 NA48 NA49 NA60 QA04 QA14

Claims (12)

[Claims] 1. A method according to claim 1, further comprising: applying a sealing material for bonding the two substrates, and spraying spacer particles for forming a gap between the two substrates or forming protrusions on at least one of the substrates. A method of manufacturing a liquid crystal display device, in which two substrates are vacuum-adsorbed one by one, and alignment is performed, and then the substrates are attached to each other. A method of manufacturing a liquid crystal display device, wherein the substrate is brought into contact with an elastic body and vacuum-sucked by suction holes of the elastic body provided at an angle to the thickness direction of the elastic body. 2. The method according to claim 1, wherein the suction holes of the elastic body are inclined in the same direction. 3. The method for manufacturing a liquid crystal display device according to claim 1, wherein the suction holes of the elastic body are inclined at least 3 degrees with respect to the thickness direction of the elastic body. 4. Applying a sealant for bonding two substrates, dispersing or forming protrusions of spacer particles for forming a gap between the two substrates, and dropping a predetermined amount of liquid crystal material. Is performed on at least one of the substrates, a step of vacuum-sucking the two substrates one by one, and maintaining an atmosphere including the two substrates at a vacuum degree lower than the vacuum suction of the substrates. Performing the alignment while maintaining a constant distance between the two substrates, and after the alignment is completed, pressing the two substrates, crushing the sealing material, and bonding the substrates. A method of manufacturing a liquid crystal display device, comprising the steps of: contacting one of the substrates with an elastic body when vacuum-absorbing the substrate; and providing the elastic body inclined with respect to the elastic body thickness direction. Vacuum suction through body suction holes A method of manufacturing a liquid crystal display device. 5. The method according to claim 4, wherein the suction holes of the elastic body are inclined in the same direction. 6. The method according to claim 4, wherein the suction holes of the elastic body are inclined at least 3 degrees with respect to the thickness direction of the elastic body. 7. An upper surface plate and a lower surface plate on which a plate-like elastic body is installed, and apply a sealing material and scatter spacer particles or form projections on at least one substrate. Positioning is performed in a state where the two substrates are vacuum-adsorbed one by one to the upper surface plate and the lower surface plate, respectively.
A manufacturing apparatus for a liquid crystal display device, which can perform the bonding of the substrates by pressing the upper and lower substrates by the both surface plates,
An apparatus for manufacturing a liquid crystal display device, wherein the suction holes of the elastic body are provided to be inclined with respect to the thickness direction of the elastic body. 8. The manufacturing apparatus according to claim 7, wherein the suction holes of the elastic body are inclined in the same direction. 9. The manufacturing apparatus for a liquid crystal display device according to claim 7, wherein the suction holes of the elastic body are inclined at least 3 degrees with respect to the thickness direction of the elastic body. 10. An upper platen, a lower platen on which a plate-like elastic body is installed, and a chamber in which the upper platen and the lower platen are installed. Spraying of spacer particles or formation of protrusions and dropping of a predetermined amount of liquid crystal material were performed on at least one of the substrates, and the two substrates were vacuum-adsorbed one by one on the upper surface plate and the lower surface plate. Then, in a state where the inside of the chamber is maintained at a vacuum degree lower than the vacuum degree at which the substrate is sucked, alignment is performed while maintaining a constant distance between the two substrates, An apparatus for manufacturing a liquid crystal display device capable of applying pressure to a substrate and squeezing a sealing material to bond the substrate, wherein the suction hole of the elastic body is provided to be inclined with respect to the thickness direction of the elastic body. An apparatus for manufacturing a liquid crystal display device, comprising: 11. An apparatus for manufacturing a liquid crystal display device according to claim 10, wherein the suction holes of the elastic body are inclined in the same direction. 12. The apparatus for manufacturing a liquid crystal display device according to claim 10, wherein the suction holes of the elastic body are inclined at least 3 degrees with respect to the thickness direction of the elastic body.