JP3182839B2 - Manufacturing method of liquid crystal display element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display device.

[0002]

2. Description of the Related Art In general, a liquid crystal display device is formed by bonding a pair of transparent substrates having an area from which a plurality of liquid crystal cells can be collected to a respective cell portion thereof through a sealing material provided so as to surround the liquid crystal sealing region. A method of assembling a cell unit in which liquid crystal cells are assembled, wiping and removing dirt on the surface of the cell unit (substrate surface), separating the cell unit into cells, and injecting liquid crystal into a liquid crystal sealed area of each cell. It is manufactured in.

In each of the cell portions of the pair of substrates, a transparent electrode for display and an alignment film are formed. Further, the sealing material is provided with a liquid crystal injection port formed by partially cutting one side thereof, and liquid crystal is injected into the cell by a vacuum injection method. Later sealed.

[0004]

However, conventionally, since the dirt on the surface of the cell unit is manually wiped off, it is difficult to completely remove the dirt on the surface of the cell unit. This takes time, and this is a factor that increases the manufacturing cost of the liquid crystal display device.

SUMMARY OF THE INVENTION It is an object of the present invention to remove dirt on the surface of a cell unit almost completely and efficiently, and furthermore, when removing dirt on the surface of a cell, a substance which affects the characteristics of a liquid crystal display element. An object of the present invention is to provide a method for manufacturing a liquid crystal display element that does not enter a cell.

[0006]

[0007]

According to a method of manufacturing a liquid crystal display device of the present invention, a pair of transparent substrates having an area from which a plurality of liquid crystal cells can be collected are provided so as to surround a liquid crystal sealing region of each of the plurality of cell portions . a plurality of cell seal member to each of the one side having the liquid crystal injection port, the plurality of cell portions based Itagaishu portion
An outer peripheral sealing material provided around the sealing material and having a vent on one side, and at least one end between the vent forming side of the outer peripheral sealing material and a cell portion closest to the vent forming side; Is provided at a distance from the
A formed region and a region where the plurality of cell portions are arranged;
And a gas generated from a sealant for sealing the ventilation port.
To enter the area where the plurality of cell parts are arranged.
A plurality of liquid crystals are adhered to each other by discharging excess air between the pair of transparent substrates through the vent hole via a partition wall material for blocking.
A step of forming a cell unit in which the cells are assembled , and sealing the inside of the cell unit by sealing the vent hole with a sealant;
Forming a sealed cell unit assembly , washing the surface of the sealed cell unit in a washing liquid, separating the washed cell unit along a boundary of each cell, and enclosing liquid crystal in the cell. A step of injecting a liquid crystal into the region from the liquid crystal injection port; and a step of sealing the liquid crystal injection port of a cell into which the liquid crystal has been injected. Further, the cell unit assembly of the present invention has a plurality of liquids.
A pair of transparent substrates with an area where crystal cells can be collected
Are provided around the liquid crystal sealed area of each
Plural cell sealing materials having a liquid crystal injection port on one side
And surrounding the plurality of cell sealing materials around the outer periphery of the substrate.
Peripheral sealing material having a vent on one side;
Peripheral seal material air vent formation side and the closest to this air vent formation side
At least one end between the outer peripheral sealing material
And the area where the vent is formed
The plurality of cell sections are partitioned from the area in which
The gas generated from the sealant that seals the mouth is filled with the plurality of cells.
And a partition wall material for preventing the portion from entering the arranged area.
And the vent is sealed with a sealant.
The liquid crystal cell is characterized by
It is characterized by the following.

[0008]

According to the present invention, since the surface of the cell unit is cleaned in the cleaning liquid, dirt on the unit surface can be almost completely and efficiently removed.

Further, according to the present invention, the outer periphery of the cell unit is sealed with an outer peripheral sealing material for bonding the outer peripheral portions of the pair of substrates, and a vent provided in the outer peripheral sealing material is sealed to seal the inside of the cell unit. Since the cell unit is cleaned in a sealed state, even if the cell unit is immersed in the cleaning liquid, the cleaning liquid does not enter the cell unit and enter the cell unit. The vent is provided to allow excess air between the two substrates to escape to the outside when the pair of substrates are bonded.

When the vent is sealed, gas generated by the vent sealant is released to the periphery of the surface of the sealant. If the cell portion closest to the side is partitioned by the partition wall material, the gas released from the sealant does not enter the cell portion. Since the partition material is provided with at least one end thereof separated from the outer peripheral seal material, when bonding a pair of substrates, excess air between the two substrates is removed between the partition material end and the outer peripheral seal material. Through to the vent.

Therefore, according to the present invention, while the surface of the cell unit is cleaned in a cleaning liquid to remove the dirt on the surface of the unit, the characteristics of the liquid crystal display element are reduced when the dirt on the surface of the unit is removed. Since a substance which exerts an influence, that is, a gas released from the cleaning liquid or the vent sealing agent does not enter the cell, a liquid crystal display element having good characteristics can be manufactured.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a partially cutaway plan view of a cell unit,
FIG. 2 is a partially cutaway plan view of the manufactured liquid crystal cell, and FIG. 3 is a manufacturing process diagram of the liquid crystal display element.

First, the configuration of the cell unit shown in FIG. 1 will be described. In this cell unit A, a pair of transparent substrates 1 and 2 having an area from which a plurality of liquid crystal cells can be collected is provided in each cell portion B thereof. a rectangular frame-shaped cell seal member 3 provided to surround the liquid crystal filling area, a rectangular frame-shaped peripheral sealing material 5 provided on the outer peripheral portion of the substrate is constituted by bonding through a partition wall member 7 to be described later ing. Although not shown, a transparent electrode for display and an alignment film are formed in each of the cell portions B of the pair of substrates 1 and 2, respectively.

A liquid crystal injection port 4 formed by partially removing the sealing material 3 is provided on one side of the sealing material 3 of each of the cell portions B, and one side of the outer peripheral sealing material 5 is provided. A vent 6 formed by partially removing the sealing material 3 is provided. The air vent 6 is provided to allow excess air between the two substrates 1 and 2 to escape to the outside when the pair of substrates 1 and 2 are bonded via the sealing members 3 and 5. The vent 6 is sealed with a sealant 8 after the cell unit A is assembled.

The partition member 7 is formed to be sufficiently longer than the width of the vent hole 6 along the inside of the side of the outer peripheral seal member 5 where the vent hole 6 is formed. A partition is formed between the formation side and the cell portion B closest to the ventilation port formation side. Further, both ends of the partition wall member 7 are separated from the outer peripheral seal member 5, and both ends thereof are connected to the outer peripheral seal member 5.
Is a ventilation path for guiding excess air between the two substrates 1 and 2 to the ventilation port 6 of the outer peripheral sealing material when the pair of substrates 1 and 2 are bonded. Next, a method of manufacturing the liquid crystal display element will be described. The liquid crystal display element is provided, as shown in the manufacturing process diagram of FIG. A step of sealing the inside of the cell unit A by sealing the ventilation port 6 with the sealing agent 7, a step of washing the surface of the sealed cell unit A in a washing liquid, and separating the washed cell unit A into each cell. It is manufactured by a process, a process of injecting a liquid crystal into a liquid crystal filling region of the cell from a liquid crystal injection port 4, and a process of sealing the liquid crystal injection port 4 of the cell into which the liquid crystal has been injected.

The production method will be described in detail. The cell unit A includes a cell part sealing material 3 on one of a pair of substrates 1 and 2 in which a transparent electrode for display and an alignment film are formed in each cell part B. And the outer peripheral sealing material 5 and the partition wall material 7 are printed by a screen printing method or the like.
Assemble by bonding through 5. In addition, the said sealing material 3,
A thermosetting resin is used for the material 5 and the partition member 7.
The bonding of the two substrates 1 and 2 is performed by sealing the sealing materials 3 and 5 with the partition material 7.
And pressurizing so that the substrate gap becomes a predetermined gap, and heating to the curing temperature of the thermosetting resin to cure the sealing members 3 and 5 and the partition wall member 7.

In this case, surplus air in a region (liquid crystal sealing region) surrounded by the cell sealing material 3 between the two substrates 1 and 2 is:
Excess air discharged from the liquid crystal injection port 4 to the outside of the cell portion B and in the region surrounded by the outer peripheral sealing material 5 passes between both ends of the partition wall material 7 and the outer peripheral sealing material 5 and is discharged from the outer peripheral sealing material 5. Since the air is guided to the vent 6 and is discharged from the vent 6 to the outside of the cell unit A, the air pressure between the two substrates 1 and 2 does not increase.
Can be bonded to each other without deforming the substrate.

The sealing of the vent 6 after assembling the cell unit A is performed by applying a sealant 8 to the vent 6 and curing the sealant 8. In this embodiment,
In order to easily seal the vent 6 in a short time, an adhesive containing a volatile solvent is used as the vent sealing agent 8.

In this case, when the vent sealant 8 is cured, the volatile solvent contained in the sealant 8 evaporates to generate gas, and this gas is generated around the surface of the sealant 8. Will be released. In this case, the gas released from the sealant 7 only spreads over a narrow range around the sealant 7, but the cell portion B located near the vent 6 is within the spread range of the gas release. Therefore, the gas released from the sealant 7 enters the cell portion B within the spread range from the liquid crystal injection port 4.

However, in this embodiment, the outer peripheral sealing material 5
And the cell portion B closest to the vent forming side
Is separated by the partition wall member 7, the gas released from the vent sealant 7 is retained in the space between the partition wall member 7 and the side of the outer peripheral seal member 5 where the vent is formed. The gas released from the sealant 7 does not enter the cell portion B.

After sealing the vent 6 of the cell unit A, the cell unit A is immersed in a cleaning solution, and the surface of the cell unit A (the surfaces of the substrates 1 and 2) is cleaned in the cleaning solution. Removes dirt on the unit surface. The cleaning of the cell unit A in the cleaning liquid is performed by, for example, ultrasonic cleaning.

As described above, when the surface of the cell unit A is washed in the washing liquid, the dirt on the unit surface is almost completely removed. Further, according to this submerged cleaning, a large number of cell units A can be cleaned simultaneously and in a short time, so that the dirt on the unit surface can be efficiently removed.

In this case, the outer periphery of the cell unit A is sealed by an outer peripheral seal member 5 for bonding the outer peripheral portions of the pair of substrates 1 and 2, and a vent 6 provided in the outer peripheral seal member 5 is sealed with a vent. Because it is sealed by the stopper 8,
Even if the cell unit A is immersed in the cleaning solution, the cell unit A
The cleaning liquid does not enter the cell portion B by entering the inside of the cell.

After cleaning the surface of the cell unit A in this way, if necessary, an edge frame, a decorative pattern or the like of each cell portion B is printed on one or both surfaces of the substrates 1 and 2. Thereafter, the cell unit A is cut along the boundary of each cell portion B to separate the cell unit A into individual liquid crystal cells.

Thereafter, liquid crystal is injected into the liquid crystal filling region of each of the separated cells from the liquid crystal injection port 4 by a vacuum injection method.
The liquid crystal injection port 4 of the cell into which liquid crystal has been injected is sealed to complete the liquid crystal display device shown in FIG. In FIG. 2,
LC is a liquid crystal sealed in the cell, 9 is a sealant for the liquid crystal injection port 4, and the injection port sealant 9 is an ultraviolet curable resin.

That is, the manufacturing method described above is for cleaning the surface of the cell unit A in a cleaning solution to remove dirt on the surface of the unit. According to this manufacturing method, compared to the conventional manual wiping, Dirt on the unit surface can be almost completely and efficiently removed.

Further, in the above-described manufacturing method, the outer periphery of the cell unit A is sealed with the outer peripheral seal member 5 for bonding the outer peripheral portions of the pair of substrates 1 and 2.
Since the cell unit A is washed while the inside of the cell unit A is sealed by sealing the vent 6 provided in the cell unit A, even if the cell unit A is immersed in the washing liquid, the washing liquid enters the inside of the cell unit A. And does not enter the cell portion B. When the vent 6 is sealed with the sealant 7, the gas generated by the sealant 7 is released around the sealant 7.
As described above, if the partition between the vent forming side of the outer peripheral sealing material 5 and the cell portion B closest to the vent forming side is partitioned by the partition wall material 7, the gas released from the vent sealing agent 8 will It does not enter part B.

Therefore, according to the manufacturing method described above, while the surface of the cell unit A is cleaned in a cleaning liquid to remove the dirt on the surface of the unit, when removing the dirt on the surface of the unit, the liquid crystal display element is removed. Since a substance which affects the characteristics, that is, the cleaning liquid or the gas released from the vent sealing agent 7 does not enter the cell, a liquid crystal display element having good characteristics can be manufactured.

In the above embodiment, both ends of the partition wall member 7 are separated from the outer peripheral seal member 5, respectively. However, if at least one end of the partition wall member 7 is separated from the outer peripheral seal member 5, the pair of substrates 1 2 can be guided to the vent 6 of the outer peripheral sealing member 5 when the two substrates 1 and 2 are bonded. You may leave.

[0030]

According to the present invention, since the surface of the cell unit is cleaned in the cleaning liquid, dirt on the surface of the cell unit can be almost completely and efficiently removed.

Further, according to the present invention, the outer periphery of the cell unit is sealed with an outer peripheral seal member for adhering the outer peripheral portions of the pair of substrates, and a vent provided in the outer peripheral seal member is sealed to seal the inside of the cell unit. Since the cell unit is cleaned in a sealed state, even if the cell unit is immersed in the cleaning liquid, the cleaning liquid does not enter the cell unit and enter the cell part, and the vent hole of the outer peripheral sealing material is formed. Since the side and the cell portion closest to the vent forming side are partitioned by the partition wall material, at the time of sealing the vent, gas released from the sealant flows to the cell near the vent of the outer peripheral sealing material. There is no intrusion.

Therefore, according to the present invention, while the surface of the cell unit is cleaned in a cleaning liquid to remove the dirt on the surface of the unit, the characteristics of the liquid crystal display element are reduced when removing the dirt on the surface of the unit. A liquid crystal display element having good characteristics can be manufactured by preventing a substance which exerts an influence, that is, a gas discharged from the cleaning liquid or the vent sealant from entering the cell.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a cell unit showing one embodiment of the present invention.

FIG. 2 is a partially cutaway plan view of the manufactured liquid crystal display element.

FIG. 3 is a manufacturing process diagram of the liquid crystal display element.

[Explanation of symbols]

A: cell unit, B: cell part, 1, 2, substrate, 3: cell part sealing material, 4: liquid crystal injection port, 5: outer peripheral sealing material, 6
... vent, 7 ... partition material, 8 ... vent sealant, 9 ... filler sealant, LC ... liquid crystal.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-231928 (JP, A) JP-A-56-106219 (JP, A) JP-A-63-271226 (JP, A) JP-A-2- 64523 (JP, A) JP-A-49-122354 (JP, A) JP-A-5-232422 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02F 1/1341 G02F 1 / 13 101

Claims (2)

(57) [Claims] 1. A plurality of cell part sealing materials provided with a pair of transparent substrates having an area capable of collecting a plurality of liquid crystal cells, surrounding a liquid crystal sealing region of each of the plurality of cell parts, and having a liquid crystal injection port on each side. And the plurality of cell portions on an outer peripheral portion of the substrate.
An outer peripheral sealing material provided around the sealing material and having a vent on one side, and at least one end between the vent forming side of the outer peripheral sealing material and a cell portion closest to the vent forming side; Is provided at a distance from the
A formed region and a region where the plurality of cell portions are arranged;
And a gas generated from a sealant for sealing the ventilation port.
To enter the area where the plurality of cell parts are arranged.
A step of forming a cell unit in which a plurality of liquid crystal cells are aggregated by adhering while discharging excess air between the pair of transparent substrates through the vent through a partition wall material to be blocked, and sealing the vent. Forming a cell unit assembly in which the inside of the cell unit is sealed with an agent ; cleaning the surface of the sealed cell unit in a cleaning solution; Separating the liquid crystal from the liquid crystal filling region of the cell through the liquid crystal filling port, and sealing the liquid crystal filling port of the cell into which the liquid crystal has been injected. A method for manufacturing a display element. (2) A pair of areas that can collect multiple liquid crystal cells
Transparent substrate surrounds the liquid crystal sealed area of each of the multiple cell sections
With a liquid crystal injection port on each side.
A number of cell sealing materials, and the plurality of cell
Perimeter that is provided around the sealing material and has a vent on one side
A sealing material, a ventilation port forming side of the outer peripheral sealing material,
At least one end between the cell part closest to the vent forming side
The vent hole is provided apart from the outer peripheral sealing material,
A formed region and a region where the plurality of cell portions are arranged;
And a gas generated from a sealant for sealing the ventilation port.
To enter the area where the plurality of cell parts are arranged.
It is joined through the partition wall material to block and seals the vent.
Liquid crystal cells characterized by being sealed with an agent
Set Cell unit assembly.