JPH08271909A - Production of lqiuid crystal display element and production apparatus used for the production - Google Patents

Abstract

PURPOSE: To provide a process for reduction which does not deteriorate display without the occurrence of curving and distorting of substrates as a process for producing liquid crystal display substrates and to make it possible to form, a liquid crystal display element to a larger size and to drastically reduce its manufacturing cost. CONSTITUTION: This process for producing the liquid crystal display element comprises disposing two sheets of electrode substrates 2, 4 via a sealing material 3 in such a manner that their electrode surfaces face each other and selectively supplying energy for curing the sealing material 3 only in the region of the sealing material 3 in the state of adjusting the spacing between these substrates to a desired spacing. This apparatus for production is used for this process. The process and apparatus for production described above selectively supply the energy to the region of the sealing material 3 and are, therefore, capable of curing the sealing material 3 while adjusting the inter-substrate spacing by utilizing the part of the display region of the electrode substrates 2, 4 and further utilizing the dynamic pressure of gas, magnetic force, etc.

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 device and a manufacturing apparatus used therefor, and in particular, after aligning two electrode substrates with each other, a desired substrate gap (or interval, The present invention relates to a manufacturing method for adjusting and adjusting a gap, and a manufacturing apparatus used therefor.

[0002]

2. Description of the Related Art FIG. 11 shows, for example, JP-A-4-3248.
It is sectional drawing which shows the manufacturing method of the conventional liquid crystal display element shown by 23 specification. In the figure, 2 is the upper electrode substrate, 3
Is a sealing material, 4 is a lower electrode substrate, 5 is a spacer for holding a substrate gap, 6 is light energy for curing the sealing material, 17 is light energy 6 that can be transmitted,
And a surface plate for applying pressure to the electrode substrates 2 and 4, 18
Is the lower surface plate.

In the conventional method for manufacturing a liquid crystal display element, the step of adhering two electrode substrates while aligning them with each other while adjusting a desired substrate gap is as follows. The electrode substrates 2 and 4 are sandwiched between the electrodes and pressure is applied to supply light energy 6 for curing the sealing material 3 to the entire surface of the electrode substrate.

[0004]

In the conventional method for manufacturing a liquid crystal display device as described above, since the entire substrate is heated to a high temperature due to light energy, the substrate due to the difference in coefficient of thermal expansion when bonding different substrate materials is used. However, there was a problem in that the bending and distortion occurred.

Further, in order to supply light energy to the entire surface of the substrate, not only the energy is consumed in the surplus portion other than the seal portion, but also the liquid crystal display element (Liquid Crystal Display).
There is also a problem in that a driving element, a film, or the like formed in a display portion of an LCD (hereinafter, simply referred to as an LCD) is affected to cause display deterioration.

In particular, the ultraviolet rays contained in the light for curing the sealing material are simply referred to as TFT (Thin Film Transistor)
That is, the effect of changing the characteristics of (1) or damaging the alignment film which is a polymer film (for example, a polyimide film) and deteriorating the alignment property of the liquid crystal molecules is large.

Further, there has been a problem that as the size of the LCD increases, the size of the device for bonding the electrode substrates increases and the running cost increases significantly.

[0008]

In the method of manufacturing a liquid crystal display element according to the present invention, an energy transmitting member is used to selectively supply energy for curing the sealing material only to the area of the sealing material. You can

In the manufacturing method of the present invention, the sealing material can be cured by adjusting the substrate gap by various methods.

The light guide according to the present invention can also serve as a positioning mechanism or can be pressed by the light guide itself.

In the manufacturing method of the present invention, the energy for curing the sealing material can be selectively supplied only to the area of the sealing material, and the substrate can be pressed by various methods to cure the sealing material.

An apparatus for manufacturing a liquid crystal display element according to the present invention is characterized by including a light guide and the like used in the manufacturing method of the present invention.

In order to embody the present invention, the manufacturing method of the liquid crystal display element of the present invention is such that two electrode substrates, an upper electrode substrate 2 and a lower electrode substrate 4, are provided on a display area portion via a sealing material. A method of manufacturing a liquid crystal display device, in which electrode surfaces to be formed are opposed to each other and adjusted to a desired substrate gap and then bonded, and then the sealing material is cured, wherein energy is selectively applied to a region where the sealing material is formed. It is characterized in that the sealing material is supplied to and cured.

The area corresponding to the area where the sealing material is formed,
It is preferable that an energy transmitting member is brought into contact with a position on the upper electrode substrate 2 to selectively supply energy.

It is preferable that the energy is selectively supplied to the region where the sealing material is formed, and at the same time, the energy is supplied from the end face side of the electrode substrate.

Corresponding to the area where the sealing material is formed,
It is preferable that an energy transmitting member is brought into contact with a position on the electrode substrate to selectively supply energy and at the same time, pressure is applied by the energy transmitting member.

It is preferable to selectively supply energy to the region where the sealing material is formed while scanning at least one movable energy transmission member along the upper surface of the upper electrode substrate 2.

It is preferable that the alignment marks provided on the two electrode substrates are recognized through a part of the energy transmission member to perform the alignment.

It is preferable to adjust the gap between the two electrode substrates to a desired gap by gas pressure.

It is preferable to adjust the gap between the two electrode substrates to a desired gap by an air bag.

The tube direction of a bundle of a plurality of tubes is made perpendicular to the upper electrode substrate (2), and the bundle is brought into contact with the display area to move the gas passing through the inside of the tubes. It is preferable to adjust the gap between the two electrode substrates to a desired gap by pressure.

It is preferable that the two electrode substrates are arranged in a bag-like sheet, and the inside of the sheet is in a negative pressure state to adjust the gap between the two electrode substrates to a desired gap.

It is preferable to adjust the gap between the two electrode substrates to a desired gap by the liquid pressure of the liquid.

A magnetic material is provided on one of the lower side of the lower electrode substrate 4 and the upper side of the upper electrode substrate 2.
On the other hand, it is preferable to dispose a magnetic body or a surface plate sensitive to magnetic force and adjust the gap between the electrode substrates to a desired gap by the magnetic force of the magnetic body.

It is preferable that the magnetic body is an electromagnet.

In addition, according to the method of manufacturing the liquid crystal display element of the present invention, the upper electrode substrate 2 and the lower electrode substrate 4 are separated by a sealing material.
A method of manufacturing a liquid crystal display device, comprising: adhering electrode sheets formed in a display area portion of a sheet of electrode substrates so that they face each other with a desired substrate gap, and then curing the sealing material. It is characterized in that an energy transmitting member is brought into contact with a position corresponding to an area where the material is formed to selectively supply energy and the liquid crystal display area of the electrode substrate is pressed to cure the sealing material.

It is preferable that the energy is selectively supplied to the regions of the two electrode substrates on which the sealing material is formed, and at the same time, the energy is supplied from the end faces of the two electrode substrates.

Corresponding to the area where the sealing material is formed,
It is preferable that an energy transmitting member is brought into contact with a position on the electrode substrate to selectively supply energy and at the same time, pressure is applied by the energy transmitting member.

It is preferable that the alignment marks provided on the two electrode substrates are recognized through a part of the energy transmission member to perform the alignment.

Pressure is preferably applied by gas pressure.

It is preferable to apply pressure by an air bag.

It is preferable that the tube direction of a bundle of a plurality of tubes is perpendicular to the upper electrode substrate 2, and the tube is brought into contact with the display area and pressurized by the dynamic pressure of gas passing through the inside of the tubes. .

It is preferable to apply pressure by the liquid pressure of the liquid.

A magnetic material is provided on one of the lower side of the lower electrode substrate 4 and the upper side of the upper electrode substrate 2.
On the other hand, it is preferable to dispose a magnetic material or a surface plate sensitive to magnetic force and pressurize by the magnetic force of the magnetic material.

It is preferable that the magnetic body is an electromagnet.

In addition, according to the method of manufacturing the liquid crystal display element of the present invention, the upper electrode substrate 2 and the lower electrode substrate 4 are separated by the sealing material.
After the electrode surfaces formed in the display area of the sheet of electrode substrates are opposed to each other and the substrates are adjusted to have a desired substrate gap and bonded together, the tube direction of the plurality of tubes bundled is the upper electrode substrate. It is characterized in that it is perpendicular to 2, and is brought into contact with the display area and is pressurized by the dynamic pressure of gas passing through the inside of the tube to cure the sealing material.

Further, the manufacturing apparatus used in the method for manufacturing the liquid crystal display element of the present invention is characterized by including a light guide for supplying energy and an energy supply source for curing the sealing material.

It is preferable to have a mechanism for scanning the light guide along the upper surface of the upper electrode substrate 2.

It is preferable that the light guide has a taper portion outside the portion in contact with the upper electrode substrate 2, and energy can be supplied from the taper portion to the end face portions of the two electrode substrates.

It is preferable that the light guide body also has a mechanism for recognizing the alignment marks provided on the two electrode substrates.

It is preferable to have a mechanism for supplying gas to the upper part of the upper electrode substrate 2.

It is preferable to have an air bag and a mechanism for supplying gas to the air bag.

It is preferable to have a bundle of a plurality of tubes and a mechanism for supplying gas to the bundle.

It is preferable to have a bag-shaped sheet and a vacuum device capable of making a negative pressure inside the sheet.

It is preferable to have a device for supplying a liquid for pressurizing the display area by its liquid pressure onto the upper electrode substrate 2.

A magnetic material is provided on either one of the lower side of the lower electrode substrate 4 and the upper side of the upper electrode substrate 2.
On the other hand, it is preferable to include a surface plate sensitive to a magnetic material or magnetic force.

It is preferable that the magnetic body is an electromagnet.

[0048]

In the liquid crystal display device manufacturing method of the present invention, the energy for curing the sealing material is selectively supplied only to the area of the sealing material, so that the temperature of the entire substrate does not rise.

Further, in the liquid crystal display device manufacturing method of the present invention, since the substrate gap is adjusted and the sealing material is cured, the substrate gap can be controlled with high accuracy.

The energy transmitting means of the present invention need only contact the sealing material region of the substrate, and the display region can be used for adjusting the substrate gap and pressing the substrate, and various methods can be combined. be able to.

[0051]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method of manufacturing a liquid crystal display device of the present invention and a manufacturing apparatus used therefor will be described below with reference to the accompanying drawings.

[Embodiment 1] FIG. 1 is a sectional view showing an embodiment of the present invention. In the figure, 1 is an energy transmission member (hereinafter referred to as a light guide) which is a transmission member for guiding light energy, 2 is an upper electrode substrate, 3 is a sealing material, 4 is a lower electrode substrate, 5 is a spacer, 6 is light energy.

The sealing material 3 is formed around the electrode substrate 2 by screen printing or the like. A spacer 5 (for example, Micropearl manufactured by Sekisui Fine Chemical Co., Ltd.) that holds a substrate gap is arranged on the opposing lower electrode substrate 4 in the display screen of the LCD. Next, as shown in FIG. 1, the electrodes are attached so that the electrode sides face each other. In this state, the light energy 6 is passed through the light guide 1 only to the area of the sealing material 3 in the peripheral portion of the substrate.
Is added to cure the sealing material 3. Here, as the material of the light guide body 1, for example, quartz used for an optical fiber is suitable. The light guide 1 may be formed by bundling a large number of lumps such as quartz or fibers.

The seal material 3 may be, for example, an ultraviolet curable seal material World Rock 882 (manufactured by Kyoritsu Chemical Industry Co., Ltd.) or a thermosetting seal material Struct Bond XN-21-S (Mitsui Toatsu Chemical ( Co., Ltd.) and the like can be used. As the light energy 6, ultraviolet rays can be used for the former sealing material and infrared rays can be used for the latter sealing material.

Furthermore, when the light energy 6 is applied, the pressure can be applied to the electrode substrates 2 and 4 at the same time by utilizing the light guide 1 itself.

In addition, the light guide 1 is a sealing material 3 on the periphery of the substrate.
Since it abuts only on the area of, the central display area can be used to adjust the substrate gap or pressurize the substrate, so that the sealing material can be cured while adjusting the substrate gap with higher accuracy. it can.

By selectively supplying light energy, the amount of light energy required is much smaller than in the conventional case where light energy is supplied to the entire surface. For example, LC with a screen size of about 10 inches
In the case of D, compared with the total amount of energy required in the case of the conventional method of supplying light energy to the entire surface of the electrode substrate,
The total amount of energy required in the method of the invention for selectively supplying light energy to the area of the sealing material 3 is about 1
It is about / 5.

In the present invention, the type of the sealing material and the light source to be used is not an essential requirement and can be appropriately selected depending on the situation of use.

That is, the types of the sealing material and the light source can be selected according to the performance of the liquid crystal display element.

[Embodiment 2] FIG. 2 is a sectional view showing an embodiment of the present invention. In the figure, 1A is a light guide for guiding light, 2 is an upper electrode substrate, 3 is a sealing material, 4 is a lower electrode substrate, 5 is a spacer, and 6 is light energy.

The sealing material 3 is formed around the electrode substrate 2 by screen printing or the like. A spacer 5 (for example, Micropearl manufactured by Sekisui Fine Chemical Co., Ltd.) that holds a substrate gap is arranged on the opposing lower electrode substrate 4 in the display screen of the LCD. Next, as shown in FIG. 2, the electrodes are attached so that the electrodes face each other. In this state, light energy 6 is applied to only the region of the sealing material 3 in the peripheral portion of the substrate via the light guide 1A to cure the sealing material 3. Here, the light guide 1A
Quartz, which is used for optical fibers, is suitable as the material of the above. The light guide 1A may be formed by bundling a large number of lumps such as quartz or fibers. Here, as shown in FIG. 2, the end of the light guide 1A is tapered by machining, for example, so that the light energy 6 is also supplied to the end surface of the electrode substrate 2. As a result, the light entering the light guide 1A enters from the end of the electrode substrate 2, so that the intensity of the light energy 6 supplied to the sealing material 3 can be improved and even if the region of the sealing material 3 of the electrode substrate is opaque. The sealing material 3 can be hardened.

A light-shielding film such as a metal film may be formed on the electrode substrate 2 depending on the pattern of electrode formation, and when the opaque portion is included, it is suitable to use the light guide of this embodiment. .

Of these UV curable resins, most of them that can be used for liquid crystal display elements are opaque, but by using the light guide of this embodiment, the resin selection range can be expanded.

As the sealing material, for example, UV-curable sealing material World Rock 882 (Kyoritsu Chemical Industry Co., Ltd.) can be used.
Company) or thermosetting sealant Structbond XN-
21-S (manufactured by Mitsui Toatsu Chemicals, Inc.) or the like can be used.

Furthermore, when applying light energy, pressure can be applied to the electrode substrates 2 and 4 at the same time by utilizing the light guide 1A itself.

Further, the light guide 1 is made up of the sealing material 3 on the periphery of the substrate.
Since it abuts only on the area of, the central display area can be used to adjust the substrate gap or pressurize the substrate, so that the sealing material can be cured while adjusting the substrate gap with higher accuracy. it can.

In the present invention, the type of the sealing material and the light source used is not a requirement and can be appropriately selected according to the situation of use.

[Embodiment 3] FIG. 3 is a sectional view showing an embodiment of the present invention. In the figure, 2 is the upper electrode substrate,
3 is a sealing material, 4 is a lower electrode substrate, 5 is a spacer, 6
Is light energy, and 7 is a movable light guide.

The sealing material 3 is formed on the periphery of the electrode substrate 2 by screen printing or the like. A spacer 5 (for example, Micropearl manufactured by Sekisui Fine Chemical Co., Ltd.) that holds a substrate gap is arranged on the opposing lower electrode substrate 4 in the display screen of the LCD. Next, as shown in FIG. 3, the electrodes are attached so that the electrodes face each other. In this state, light energy 6 is applied to cure the sealing material 3 while moving the light guide 7 along the area of the sealing material 3 only to the area of the sealing material 3 in the peripheral portion of the substrate. In this case, at least one movable light guide is necessary, but two or more light guides 7 may be used in order to increase the throughput during curing. Here, as the material of the light guide body 7, for example, quartz used for an optical fiber is suitable. The light guide 7 may be formed by bundling a large number of lumps such as quartz or fibers. The light guide 7 is moved by controlling the speed with a motor, for example.

The seal material 3 may be, for example, an ultraviolet curable seal material World Rock 882 (manufactured by Kyoritsu Chemical Industry Co., Ltd.) or a thermosetting seal material Struct Bond XN-21-S (Mitsui Toatsu Chemical ( Co., Ltd.) and the like can be used.

Furthermore, when the light energy 6 is applied, the pressure can be applied to the electrode substrates 2 and 4 by the wind pressure of the gas (not shown).

In this embodiment, the pressure can be applied by the wind pressure while scanning the light guide, and the temperature of the substrate can be adjusted at the same time by controlling the temperature of the gas.

In the present invention, the sealing material to be used, the type of the light source and the gas, and the wind pressure are not requirements, and can be appropriately selected according to the situation of use.

[Embodiment 4] FIG. 4 is a sectional view showing an embodiment of the present invention. In the figure, 1 is a light guide for guiding light,
2 is an upper electrode substrate, 3 is a sealing material, 4 is a lower electrode substrate, 5 is a spacer, 6 is light energy, and 8 is for recognizing marks formed for alignment on the electrode substrates respectively. It is a camera.

The sealing material 3 is formed on the periphery of the electrode substrate 2 by screen printing or the like. A spacer 5 (for example, Micropearl manufactured by Sekisui Fine Chemical Co., Ltd.) that holds a substrate gap is arranged on the opposing lower electrode substrate 4 in the display screen of the LCD. Next, as shown in FIG. 4, the electrodes are bonded so as to face each other. Light guide 1 in a state of being stuck
The electrode substrates 2 and 4 are aligned with each other while recognizing the alignment marks formed on the electrode substrates 2 and 4 by using the camera 8 through a part (built-in or attached) of. After the alignment is completed, light energy 6 is applied to only the region of the sealing material 3 in the peripheral portion of the substrate via the light guide 1 to cure the sealing material 3. Here, as the material of the light guide body 1, for example, quartz used for an optical fiber is suitable. The light guide 1 may be formed by bundling a large number of lumps such as quartz or fibers.

As the sealing material, for example, UV-curable sealing material World Rock 882 (Kyoritsu Chemical Industry Co., Ltd.) can be used.
Company) or thermosetting sealant Structbond XN-
21-S (manufactured by Mitsui Toatsu Chemicals, Inc.) or the like can be used.

Further, when applying light energy, pressure can be applied to the electrode substrates 2 and 4 at the same time by utilizing the light guide body 1 itself.

Further, the light guide 1 is made up of the sealing material 3 on the periphery of the substrate.
Since it abuts only on the area of, the central display area can be used to adjust the substrate gap or pressurize the substrate, so that the sealing material can be cured while adjusting the substrate gap with higher accuracy. it can.

In the present invention, the type of the sealing material and the light source used is not a requirement and can be appropriately selected according to the situation of use.

[Embodiment 5] FIG. 5 is a sectional view showing an embodiment of the present invention. In the figure, 1 is a light guide for guiding light,
2 is an upper electrode substrate, 3 is a sealing material, 4 is a lower electrode substrate, 5 is a spacer, 6 is light energy, and 9 is air.

The sealing material 3 is formed on the periphery of the electrode substrate 2 by screen printing or the like. A spacer 5 (for example, Micropearl manufactured by Sekisui Fine Chemical Co., Ltd.) that holds a substrate gap is arranged on the opposing lower electrode substrate 4 in the display screen of the LCD. Next, as shown in FIG. 5, the electrodes are attached so that the electrodes face each other. A pressure of air 9 is applied to the bonded electrode substrates to form a desired substrate gap. In this state, energy 6 is applied to only the region of the sealing material 3 in the peripheral portion of the substrate via the light guide 1 to cure the sealing material 3. In this case, since the display part of the LCD is pressurized with air, the distribution of the substrate gap can be visually checked by illuminating the sodium lamp from the lower side of the electrode substrates 2 and 4, and the substrate gap can be adjusted in real time. Here, as the material of the light guide body 1, for example, quartz used for an optical fiber is suitable. The light guide 1 may be formed by bundling a large number of lumps such as quartz or fibers.

As the sealing material, for example, an ultraviolet curable sealing material World Rock 882 (Kyoritsu Chemical Industry Co., Ltd.) can be used.
Company) or thermosetting sealant Structbond XN-
21-S (manufactured by Mitsui Toatsu Chemicals, Inc.) or the like can be used.

Furthermore, when applying light energy, pressure can be applied to the electrode substrates 2 and 4 at the same time by using the light guide body 1 itself.

Further, the light guide 1 is the sealing material 3 on the periphery of the substrate.
Since it abuts only on the area, the central display area can be used to adjust the substrate gap by the air pressure or to pressurize the substrate.

Further, by adjusting the temperature of the air 9, the temperature can be controlled when the sealing material is cured.

In the present invention, the sealing material, the light source, the type of air, the pressure and the temperature to be used are not required, but can be appropriately selected according to the situation of use.

[Embodiment 6] FIG. 6 is a sectional view showing an embodiment of the present invention. In the figure, 1 is a light guide for guiding light,
Reference numeral 2 is an upper electrode substrate, 3 is a sealing material, 4 is a lower electrode substrate, 5 is a spacer, 6 is light energy, and 10 is an air bag for pressing the electrode substrate.

The sealing material 3 is formed around the electrode substrate 2 by screen printing or the like. A spacer 5 (for example, Micropearl manufactured by Sekisui Fine Chemical Co., Ltd.) that holds a substrate gap is arranged on the opposing lower electrode substrate 4 in the display screen of the LCD. Next, as shown in FIG. 6, the electrodes are attached so that the electrodes face each other. Next, for example, gas is sent into the airbag 10 made of a material such as rubber to apply pressure to the electrode substrates 2 and 4 to form a desired substrate gap. In this state, the light guide 1 is provided only in the area of the sealing material 3 on the periphery of the substrate.
Light energy 6 is applied to cure the sealing material 3. Here, as the material of the light guide body 1, for example, quartz used for an optical fiber is suitable. Light guide 1
Can be formed by bundling a large number of lumps such as quartz or fibers.

As the air bag, a transparent one can be used. With this, the distribution of the substrate gap can be visually observed without causing light interference, and the substrate gap can be adjusted in real time.

The sealing material may be, for example, the UV-curable sealing material World Rock 882 (Kyoritsu Chemical Industry Co., Ltd.).
Company) or thermosetting sealant Structbond XN-
21-S (manufactured by Mitsui Toatsu Chemicals, Inc.) or the like can be used.

Further, when applying light energy, pressure can be applied to the electrode substrates 2 and 4 at the same time by utilizing the light guide body 1 itself.

Further, the light guide 1 is made up of the sealing material 3 on the periphery of the substrate.
Since it abuts only on the area, it is possible to use the central display area to adjust the substrate gap by the pressure of the air bag or press the substrate.

In the present invention, the type of the sealing material and the light source to be used is not a requirement and can be appropriately selected according to the situation of use.

[Embodiment 7] FIG. 7 is a sectional view showing an embodiment of the present invention. In the figure, 1 is a light guide for guiding light,
2 is an upper electrode substrate, 3 is a sealing material, 4 is a lower electrode substrate, 5 is a spacer, 6 is light energy, 9 is air, 11
Is a bundle of multiple tubes.

The sealing material 3 is formed on the periphery of the electrode substrate 2 by screen printing or the like. A spacer 5 (for example, Micropearl manufactured by Sekisui Fine Chemical Co., Ltd.) that holds a substrate gap is arranged on the opposing lower electrode substrate 4 in the display screen of the LCD. Next, as shown in FIG. 7, the electrodes are attached so that the electrode sides face each other. Next, air 9 is sent from the tubes 11 bundled on the display screen portion of the electrode substrate to apply a dynamic pressure of air to the electrode substrate. Here, if the pressure of the air 9 sent into the tube 11 is controlled for each tube, the substrate gap can be partially adjusted.

Further, if the temperature of the air 9 fed into the tube 11 is controlled for each tube, a temperature distribution can be formed in the area of the sealing material and the display area to control the curing of the sealing material.

There are fine irregularities and undulations on the substrate surface,
In addition, since the gap between the two substrates is not uniform due to the uneven size of the spacers and the uneven distribution of the spacers, it is necessary to partially adjust the substrate gap as in this embodiment. While adjusting in this way, light energy 6 is applied to only the region of the sealing material 3 in the peripheral portion of the substrate through the light guide 1 to cure the sealing material 3. Here, as the material of the light guide body 1, for example, quartz used for an optical fiber is suitable. The light guide 1 may be formed by bundling a large number of lumps such as quartz or fibers. As the material of the tube 11, glass or the like can be used.

As the sealing material, for example, UV curable sealing material World Rock 882 (Kyoritsu Chemical Industry Co., Ltd.) can be used.
Company) or thermosetting sealant Structbond XN-
21-S (manufactured by Mitsui Toatsu Chemicals, Inc.) or the like can be used.

Further, it is possible to apply pressure to the electrode substrates 2 and 4 at the same time by utilizing the light guide body 1 itself for applying light energy.

In addition, the light guide 1 is the sealing material 3 on the periphery of the substrate.
Since it abuts only on the area, the central display area can be used to adjust the substrate gap by the dynamic pressure of air through the tube or to pressurize the substrate.

In the present embodiment, the type of the sealing material, the light source, and the material of the tube to be used are not required, and can be appropriately selected according to the situation of use.

The sealing material can be hardened only by sending air to the bundle of tubes 11 of this embodiment to pressurize the substrate by the dynamic pressure of air.

[Embodiment 8] FIG. 8 is a sectional view showing an embodiment of the present invention. In the figure, 1 is a light guide for guiding light,
2 is an upper electrode substrate, 3 is a sealing material, 4 is a lower electrode substrate, 5 is a spacer, 6 is light energy, 12 is a light-transmissive bag-like sheet, and 13 is for reducing the pressure in the sheet. It is the exhaust port.

The sealing material 3 is formed around the electrode substrate 2 by screen printing or the like. A spacer 5 (for example, Micropearl manufactured by Sekisui Fine Chemical Co., Ltd.) that holds a substrate gap is arranged on the opposing lower electrode substrate 4 in the display screen of the LCD. Next, as shown in FIG. 8, the electrodes are attached so that the electrodes face each other. The bonded electrode substrate is put into the sheet 12, and the air inside is exhausted from the exhaust port 13 using a rotary pump or the like. As a result, the seat 12 becomes
Since the inside is decompressed and the electrode substrate is closely attached, the electrode substrate 2,
Since pressure can be applied to 4, the desired substrate gap can be achieved. In this method, the gap between the substrates can be adjusted and the sealing material can be cured with only a simple device.
In this state, light energy is applied to only the region of the sealing material in the peripheral portion of the substrate via the light guide 1 to cure the sealing material.
Here, as the material of the light guide body 1, for example, quartz used for an optical fiber is suitable. The light guide 1 may be formed by bundling a large number of lumps such as quartz or fibers.

As the sealing material, for example, an ultraviolet curable sealing material World Rock 882 (Kyoritsu Chemical Industry Co., Ltd.) can be used.
Company) or thermosetting sealant Structbond XN-
21-S (manufactured by Mitsui Toatsu Chemicals, Inc.) or the like can be used.

Further, as the sheet 12, a light transmitting film, for example, a polyethylene film can be used. Any material can be used for the sheet 12 as long as it does not interfere with the light supplied from the light guide 1.

Further, when the light energy 6 is applied, it is possible to utilize the light guide 1 itself and simultaneously apply pressure to the electrode substrates 2 and 4.

In this embodiment, the kinds of the sealing material, the light source and the sheet material to be used are not a requirement but can be appropriately selected according to the situation of use.

[Embodiment 9] FIG. 9 is a sectional view showing an embodiment of the present invention. In the figure, 1 is a light guide for guiding light,
2 is an upper electrode substrate, 3 is a sealing material, 4 is a lower electrode substrate, 5 is a spacer, 6 is light energy, and 14 is a liquid.

The sealing material 3 is formed around the electrode substrate 2 by screen printing or the like. A spacer 5 (for example, Micropearl manufactured by Sekisui Fine Chemical Co., Ltd.) that holds a substrate gap is arranged on the opposing lower electrode substrate 4 in the display screen of the LCD. Next, as shown in FIG. 9, the electrodes are attached so that the electrode sides face each other. Next, the pressure of the liquid 14 is applied to the electrode substrate. Here, if the temperature of the liquid 14 is controlled, the temperature when the sealing material is cured can be adjusted. Liquid 1
For example, water or a liquid having good thermal conductivity can be used as the material 4. In a pressurized state, light energy is applied to only the region of the sealing material in the peripheral portion of the substrate through the light guide 1 to cure the sealing material. Here, as the material of the light guide body 1, for example, quartz used for an optical fiber is suitable. The light guide 1 may be formed by bundling a large number of lumps such as quartz or fibers.

As the sealing material, for example, UV curable sealing material World Rock 882 (Kyoritsu Chemical Industry Co., Ltd.) can be used.
Company) or thermosetting sealant Structbond XN-
21-S (manufactured by Mitsui Toatsu Chemicals, Inc.) or the like can be used.

In addition, the light guide 1 is used when light energy is applied.
It is also possible to apply a pressure to the electrode substrates 2 and 4 at the same time by utilizing itself.

Further, the light guide 1 is the sealing material 3 on the periphery of the substrate.
Since it abuts only on the area (3), the central display area can be used to adjust the substrate gap by the liquid pressure of the liquid or to press the substrate.

In the present invention, the sealing material to be used, the type of light source, the type of liquid, and the temperature are not requirements, and can be appropriately selected according to the situation of use.

[Embodiment 10] FIG. 10 is a sectional view showing an embodiment of the present invention. In the figure, 1 is a light guide for guiding light, 2 is an upper electrode substrate, 3 is a sealing material, 4 is a lower electrode substrate, 5 is a spacer, 6 is light energy, and 15 and 16 are shown.
Is a magnetic substance.

The sealing material 3 is formed on the periphery of the electrode substrate 2 by screen printing or the like. A spacer 5 (for example, Micropearl manufactured by Sekisui Fine Chemical Co., Ltd.) that holds a substrate gap is arranged on the opposing lower electrode substrate 4 in the display screen of the LCD. Next, as shown in FIG. 10, the electrodes are attached so that the electrode sides face each other. Magnetic material 1 when pasting
Since 5 and 16 attract each other, pressure is applied to the electrode substrate so as to form a desired substrate gap. Here, if one of the magnetic bodies is an electromagnet, it is convenient for releasing the pressure. In the pressurized state, light energy 6 is applied to only the region of the sealing material 3 in the peripheral portion of the substrate through the light guide 1 to cure the sealing material 3. Here, as the material of the light guide body 1, for example, quartz used for an optical fiber is suitable. The light guide 1 may be formed by bundling a large number of lumps such as quartz or fibers. Further, for the magnetic bodies 15 and 16, for example, a rare earth magnet having a strong magnetic force can be used, but various selections can be made depending on the required pressing force.

It is not always necessary to dispose both of the magnetic bodies 15 and 16, and if the table (platen) on which the electrode substrates 2 and 4 are mounted is made of a material that is sensitive to magnetic force, such as an iron one, the liquid crystal display element is similarly formed. Can be manufactured.

As the seal material 3, for example, an ultraviolet curable seal material World Rock 882 (manufactured by Kyoritsu Chemical Industry Co., Ltd.) or a thermosetting seal material Struct Bond XN-2 is used.
1-S (manufactured by Mitsui Toatsu Chemicals, Inc.) or the like can be used.

When applying the light energy 6, pressure can be applied to the electrode substrates 2 and 4 at the same time by using the light guide body 1 itself.

Further, the light guide 1 is composed of the sealing material 3 on the periphery of the substrate.
Since it abuts only on the area, it is possible to use the central display area to adjust the substrate gap by the magnetic force of the magnetic material or to pressurize the substrate.

In the present invention, the sealing material, the type of light source, and the type of magnetic material used are not requirements, and can be appropriately selected according to the circumstances.

As for the method of controlling the substrate gap, the same effect can be obtained by combining, for example, gas and liquid, liquid and magnetic material, among the methods described in the embodiments of the present invention.

[0123]

According to the manufacturing method and manufacturing apparatus of the present invention,
When the electrode substrate of the liquid crystal display device is attached and the sealing material is cured, the energy transfer member (moving body) is brought into contact with the energy transfer member or the energy transfer member is scanned, so that only the seal portion needs to be cured. Since various energies are selectively supplied, the positional deviation between the electrode substrates can be reduced without increasing the temperature of the entire substrate, and the alignment accuracy between the substrates can be improved.

Further, since the alignment can be performed via the energy transmitting member, the alignment accuracy between the substrates can be further improved.

Since the temperature of the entire substrate does not rise, the substrates do not warp even if they are used by stacking those having different physical properties depending on the material of the substrates, for example, different thermal expansion coefficients. The effect can be reduced.

For example, the coefficient of thermal expansion is small (about 1 × 10
^-6 (1 / K)) quartz and large thermal expansion coefficient (about 10 x 1)
0 ^-6 (1 / K)), etc. is transparent and combinations or opaque silicon and non-alkali glass combination with large glass warp, a low-cost substrate that can not be selected prior for one substrate The effect that can be selected is obtained.

Similarly, even if the substrates having different thicknesses are stacked and used, the substrates do not warp, so that it is possible to reduce the variation in the substrate gap.

As described above, since it is possible to control the gap between the substrates with high precision and to cure the sealing material, it is possible to align the layer thickness of the liquid crystal with high precision without variation, and therefore, liquid crystal with no color unevenness or brightness unevenness. A display element can be manufactured.

Further, since the energy required for curing the sealing material is supplied not to the entire substrate but to only the necessary portion, the total supplied energy can be small, the running cost can be greatly reduced, and the energy can be supplied. The effect of miniaturizing the device can be obtained. In particular, the larger the substrate size, the greater the effect.

Furthermore, since it is possible to pressurize the region where the sealing material is formed by the energy transmitting member, the sealing material can be hardened more reliably.

Furthermore, since the liquid crystal display area can be pressed while the energy is selectively supplied to the area where the sealing material is formed by the energy transmitting member to cure the sealing material, the sealing material can be controlled with high precision without variation in the substrate gap. Since it can be cured, it is possible to align the liquid crystal layer thickness with high accuracy without variation, and thus it is possible to manufacture a liquid crystal display element having no color unevenness or brightness unevenness.

In addition, the curing of the sealing material is controlled by forming a temperature distribution between the sealing material region and the display region by pressurizing the electrode substrate by the dynamic pressure of the gas that bundles the tubes and passes through the inside of the tube. As a result, it is possible to obtain the effect of reducing variations in the substrate gap.

Further, the manufacturing apparatus according to the present invention requires a small amount of energy, and the facility cost and running cost can be greatly reduced by the relatively simple and inexpensive mechanism.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a manufacturing method and a manufacturing apparatus of a liquid crystal display element according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a method and apparatus for manufacturing a liquid crystal display element according to another embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a method and apparatus for manufacturing a liquid crystal display element according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a method and apparatus for manufacturing a liquid crystal display element according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a method and apparatus for manufacturing a liquid crystal display element according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a method and apparatus for manufacturing a liquid crystal display element according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a method and apparatus for manufacturing a liquid crystal display element according to another embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a method and apparatus for manufacturing a liquid crystal display element according to another embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a method and apparatus for manufacturing a liquid crystal display element according to another embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a method and apparatus for manufacturing a liquid crystal display element according to another embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a conventional method and apparatus for manufacturing a liquid crystal display element.

[Explanation of symbols]

1 light guide, 1A light guide, 2 upper electrode substrate, 3
Sealing material, 4 lower electrode substrate, 5 spacer, 6 light energy, 7 light guide (movable), 8 camera, 9
Air, 10 airbags, 11 tubes, 12 sheets, 13 exhaust ports, 14 liquids, 15 magnetic materials, 16
Magnetic material, 17 surface plate (upper side), 18 surface plate (lower side).

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiroshi Yamaguro 1-1-1, Tsukaguchihonmachi, Amagasaki City Mitsubishi Electric Corporation Material Device Research Center (72) Inventor Yasuhiro Morii 8-1-1 Tsukaguchihonmachi, Amagasaki MITSUBISHI ELECTRIC CORPORATION Material Devices Research Center

Claims (35)

[Claims] 1. An upper electrode substrate (2) with a sealing material interposed therebetween.
After the two electrode substrates of the lower electrode substrate (4) and the lower electrode substrate (4) are made to face each other by adhering the electrode surfaces formed in the display area portion to each other and adjusting the gap to a desired substrate gap, the sealing material is cured. A method of manufacturing a liquid crystal display element, comprising: selectively supplying energy to a region where the sealing material is formed to cure the sealing material. 2. The liquid crystal display element according to claim 1, wherein an energy transmission member is brought into contact with a position on the upper electrode substrate (2) corresponding to a region where the sealing material is formed to selectively supply energy. Manufacturing method. 3. The method of manufacturing a liquid crystal display element according to claim 1, wherein energy is selectively supplied to the region where the sealing material is formed, and at the same time, energy is supplied from the end face side of the electrode substrate. 4. The energy transmitting member is brought into contact with a position on the electrode substrate corresponding to a region where the sealing material is formed, and energy is selectively supplied and simultaneously pressure is applied by the energy transmitting member. A method for producing the described liquid crystal display device. 5. The energy is selectively supplied to the region where the sealing material is formed while scanning at least one movable energy transmission member along the upper surface of the upper electrode substrate (2). A method for producing the described liquid crystal display device. 6. The liquid crystal display device according to claim 2, wherein the alignment marks provided on the two electrode substrates are recognized through a part of the energy transmission member to perform alignment. Manufacturing method. 7. The method of manufacturing a liquid crystal display device according to claim 2, wherein the gap between the two electrode substrates is adjusted to a desired gap by gas pressure. 8. The method of manufacturing a liquid crystal display device according to claim 2, wherein the gap between the two electrode substrates is adjusted to a desired gap by an air bag. 9. The tube direction of a bundle of a plurality of tubes is perpendicular to the upper electrode substrate (2), and
7. The gap between the two electrode substrates is adjusted to a desired gap by bringing the bundled parts into contact with the display area and dynamic pressure of gas passing through the inside of the tube. Liquid crystal display element manufacturing method. 10. The two electrode substrates are arranged in a bag-shaped sheet, and a negative pressure is applied to the inside of the sheet to adjust the gap between the two electrode substrates to a desired gap.
The method for producing a liquid crystal display device according to 3, 4, 5 or 6. 11. The method of manufacturing a liquid crystal display device according to claim 2, wherein the gap between the two electrode substrates is adjusted to a desired gap by the liquid pressure of the liquid. 12. A magnetic body on one side of the lower side of the lower electrode substrate (4) and an upper side of the upper side electrode substrate (2), and a surface plate sensitive to a magnetic body or magnetic force on the other side. 7. The method for producing a liquid crystal display element according to claim 2, wherein the liquid crystal display element is arranged and the gap between the electrode substrates is adjusted to a desired gap by the magnetic force of the magnetic material. 13. The magnetic body is an electromagnet.
A method for producing the described liquid crystal display device. 14. Desirable electrode surfaces formed in a display area portion of two electrode substrates of an upper electrode substrate (2) and a lower electrode substrate (4) are opposed to each other via a sealing material. A method of manufacturing a liquid crystal display device, in which the sealing material is cured after being adjusted to the substrate gap and the energy transfer member is brought into contact with a position corresponding to the region where the sealing material is formed to selectively apply energy. A method of manufacturing a liquid crystal display element, characterized in that the sealing material is cured by supplying the liquid crystal display region of the electrode substrate with pressure. 15. The liquid crystal according to claim 14, wherein energy is selectively supplied to a region of the two electrode substrates on which the sealing material is formed, and at the same time, energy is also supplied from an end face side of the two electrode substrates. Display element manufacturing method. 16. The energy transfer member is brought into contact with a position on the electrode substrate corresponding to a region where the sealing material is formed, and energy is selectively supplied, and at the same time, pressure is applied by the energy transfer member. A method for producing the described liquid crystal display device. 17. The alignment mark is provided by recognizing alignment marks provided on the two electrode substrates through a part of the energy transmission member.
A method for producing the described liquid crystal display device. 18. The method according to claim 1, wherein the pressure is applied by gas pressure.
4. A method for producing a liquid crystal display device according to 4, 15, 16 or 17. 19. The pressure is applied by an air bag.
4. A method for producing a liquid crystal display device according to 4, 15, 16 or 17. 20. A gas that passes through the inside of the tubes by making the tube direction of a bundle of a plurality of tubes perpendicular to the upper electrode substrate (2) and bringing the bundle into contact with the display area. 18. The method for producing a liquid crystal display element according to claim 14, 15, 16 or 17, wherein the pressure is applied by the dynamic pressure. 21. The method of applying pressure by the liquid pressure of a liquid.
4. A method for producing a liquid crystal display device according to 4, 15, 16 or 17. 22. One of a lower side of the lower electrode substrate (4) and an upper side of the upper electrode substrate (2) is provided with a magnetic body, and the other is provided with a magnetic body or a surface plate sensitive to magnetic force. 15. Arrangement and pressurizing by the magnetic force of the said magnetic body,
15. A method for producing a liquid crystal display device according to 15, 16 or 17. 23. The magnetic body is an electromagnet.
A method for producing the described liquid crystal display device. 24. Desirable by facing the electrode surfaces formed in the display area portion of the two electrode substrates of the upper electrode substrate (2) and the lower electrode substrate (4) via a sealing material. After adhering after adjusting the substrate gap, the tube direction of a bundle of a plurality of tubes is made perpendicular to the upper electrode substrate (2), and is brought into contact with the display area so that the inside of the tube is A method of manufacturing a liquid crystal display device, characterized in that the sealing material is cured by applying a dynamic pressure of a passing gas. 25. A manufacturing apparatus used in the method for manufacturing a liquid crystal display element according to claim 1, comprising a light guide for supplying energy and an energy source for curing the sealing material. Equipment for manufacturing liquid crystal display elements. 26. A mechanism for scanning the light guide along the upper surface of the upper electrode substrate (2).
A manufacturing apparatus of the liquid crystal display element described. 27. The light guide has a taper portion outside a portion in contact with the upper electrode substrate (2), and energy can be supplied from the taper portion to end face portions of the two electrode substrates. An apparatus for manufacturing a liquid crystal display element according to claim 25. 28. The apparatus for manufacturing a liquid crystal display element according to claim 25, 26 or 27, wherein the light guide body also has a mechanism for recognizing alignment marks provided on the two electrode substrates. 29. A mechanism for supplying gas to the upper part of the upper electrode substrate (2), 25, 26, 27.
28. A liquid crystal display device manufacturing apparatus according to item 28. 30. An air bag and a mechanism for supplying gas to the air bag, wherein the air bag is provided.
8. The manufacturing apparatus of the liquid crystal display element according to 8. 31. The liquid crystal display device manufacturing apparatus according to claim 25, 27 or 28, comprising a bundle of a plurality of tubes and a mechanism for supplying gas to the bundle. 32. A bag-shaped sheet, and a vacuum device capable of making a negative pressure inside the sheet, 25.
27. An apparatus for manufacturing a liquid crystal display element according to 27 or 28. 33. A liquid crystal display device according to claim 25, 27 or 28, further comprising a device for supplying a liquid for pressurizing the display region by its liquid pressure onto the upper electrode substrate (2). apparatus. 34. One of a lower side of the lower electrode substrate (4) and an upper side of the upper electrode substrate (2) is provided with a magnetic body, and the other is provided with a magnetic body or a surface plate sensitive to magnetic force. 29. The liquid crystal display device manufacturing apparatus according to claim 25, 27 or 28. 35. The magnetic body is an electromagnet.
A manufacturing apparatus of the liquid crystal display element described.