JPH11174475A - Liquid crystal cell and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal cell with which the need for cleaning the circumference of the cell after liquid crystal injection and end-sealing of an injection port is eliminated by eliminating creeping up liquid crystals to the circumference of the cell at the time of liquid crystal injection and the improvement in production efficiency and reduction in cost are made possible. SOLUTION: A pair of substrates 11, 12 are joined via a frame-shaped sealing material 13 having a liquid crystal injection port 13a. Simultaneously spacing between the substrates 11, 12 on the outer side of the joined part is closed by the sealing material 13 over at least the region to be immersed into a liquid crystal bath at the time of the injection of the liquid crystals LC.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal cell and a method for manufacturing the same.

[0002]

2. Description of the Related Art Generally, liquid crystal cells having small and medium screens are manufactured by a method of manufacturing a plurality of liquid crystal cells at a time. FIG. 9 is a flow chart of a manufacturing process showing a conventional method of manufacturing a liquid crystal cell by a batch manufacturing method, FIG. 10 is a cross-sectional view of the liquid crystal cell in the main process, FIG. 11 is a diagram showing a method of injecting liquid crystal into the liquid crystal cell, FIG. 12 is a partially cutaway front view of the manufactured liquid crystal cell.

First, the liquid crystal cell 10 shown in FIG. 12 will be described. In this liquid crystal cell 10, a pair of transparent substrates 11 and 12 made of glass or the like are provided with a liquid crystal injection port 13a on one side.
A liquid crystal LC is filled in a region surrounded by the sealing material 13 between the substrates 11 and 12, and the liquid crystal injection port 13a is provided with a sealing material. 14.

The liquid crystal cell 10 is, for example, a TFT
Although not shown in the figure, a plurality of pixel electrodes arranged in a row direction and a column direction and a plurality of pixel electrodes arranged on the inner surface of the A plurality of TFTs respectively connected to the electrodes, a gate line for supplying a gate signal to the TFT in each row, and a data line for supplying a data signal to the TFT in each column are provided, and an alignment film is formed thereon. I have.

The edge of one of the substrates 11 opposite to the side where the liquid crystal injection port 13a is located, and the edge of one or both sides (one side in the figure) are smaller than the side edges of the other substrate 12. The gate lines and the data line drive circuit connection terminals are arranged at these overhanging edges.

On the inner surface of the other substrate 12, a single-film counter electrode facing each pixel electrode is provided, on which an alignment film is formed. The drive circuit connection terminal of the counter electrode is provided at an arbitrary position on the overhanging edge of the one substrate 11, and the drive circuit connection terminal and the counter electrode are electrically connected to each other at the substrate bonding portion by the sealant 13. It is connected to the.

Next, a conventional method for manufacturing a liquid crystal cell will be described with reference to FIGS. In this manufacturing method, the substrate 1 of each of the liquid crystal cells 10 of the pair of large substrates A and B having a size capable of collecting the substrates 11 and 12 for a plurality of liquid crystal cells.
The above-mentioned electrodes and an alignment film are formed on portions 1 and 12, respectively, and the pair of large substrates A and B are joined via a sealing material 13 surrounding a liquid crystal sealing region of each of the liquid crystal cells 10 to form a plurality of liquid crystals. This is a method in which the cells 10 are assembled at a time and then separated into individual liquid crystal cells 10.

[0010] As shown in FIG. 10, this manufacturing method uses a liquid crystal cell 10 from both large substrates A and B, respectively.
This is an example in which one substrate 11 and the other substrate 12 are alternately sampled.

Conventionally, the liquid crystal cell 10 is manufactured by the following steps. First, as shown in step A1 of FIG. 9 and (a) of FIG. 10, the substrates 11 and 12 for a plurality of liquid crystal cells have a size that can be collected.
One of a pair of large substrates 1 and 2 in which the above-mentioned electrodes and an alignment film and the like are formed in portions 12, for example, the substrate of each liquid crystal cell 10 on the lower large substrate 2 surface in FIG. In the parts that become 11 and 12,
A frame-like sealing material 13 having a liquid crystal injection port 13a on one side is shifted to some extent inside the cell 10 from the boundary a between the substrates 11 and 12 by a screen printing method or the like.
Printing is performed to be somewhat thicker than a cell gap d described later.

Generally, a thermosetting adhesive is used for the sealing material 13. The sealing material 13 is used even after the cell gap is adjusted in consideration of the collapse and expansion at the time of the cell gap adjustment described later. Are printed at a sufficient interval from the boundary a so as not to reach the boundary a between the substrates 11 and 12.

Next, steps A2 to A3 in FIG. 9 and FIG.
As shown in (b), the pair of large-sized substrates 1 and 2 are overlapped with each other via the sealing material 13 and pressurized. Is adjusted to have a predetermined cell gap d.

Next, as in step A4 of FIG. 9, while maintaining the pressurized state, the positional displacement between the substrates 1 and 2 is corrected, and then, as in step A5 of FIG. (Thermosetting adhesive) 13 is cured by firing, and the two substrates 1 and 2 are joined via the sealing material 13.

Next, as shown in step A6 of FIG. 9 and FIG. 10C, the pair of large substrates 1 and 2 bonded to each other are cut off at the boundary a between the substrates 11 and 12 of each liquid crystal cell 10, respectively. It is separated into individual liquid crystal cells 10.

The cell separation is performed by making a cut along the boundary a by using a dicing machine or the like on the outer surfaces of the two large substrates 1 and 2, and cutting the two large substrates 1 and 2 along the cut. Have been.

In this case, the two large substrates 1 and 2 are located at the boundary a
Although the substrates 1 and 2 cannot be cut well if they are joined by the seal material 13, the seal material 13 is printed at a sufficient distance from the boundary a as described above, and the cell gap adjustment is performed. If the sealing material 13 does not reach the boundary a even if the sealing material 13 is crushed and spread, the sealing material 13 does not hinder the cell separation, and both large substrates 1 and 2 are separated. The cutting can be performed with high precision along the cut.

Thereafter, as shown in steps A7 to A8 of FIG. 9 and FIG. 10D, each separated liquid crystal cell 10 (the area surrounded by the sealing material 13 between the substrates 1 and 2). To
The liquid crystal LC is injected and filled from the liquid crystal injection port 13a by a vacuum injection method.
Then, as shown in step A9 in FIG. 9, the cell peripheral surface is washed to complete the liquid crystal cell 10.

In the vacuum injection method, in a closed container (not shown), the inside of the container is first depressurized to bring the inside and outside of the liquid crystal cell 10 into a substantially vacuum state.
As shown in FIG. 1, the end of the liquid crystal cell 10 where the liquid crystal injection port 13a is provided is immersed in a bath of liquid crystal LC in the liquid crystal dish 20, and in this state, the inside of the container is brought to atmospheric pressure or a slightly higher pressure. This is a method of injecting the liquid crystal LC into the cell 10 by increasing the pressure. When the pressure in the container is increased while the liquid crystal injection port 13a of the liquid crystal cell 10 is immersed in the liquid crystal bath, the pressure difference between the inside and outside of the cell causes the liquid crystal in the liquid crystal bath. LC flows into the cell 10 from the liquid crystal inlet 13a.

The liquid crystal injection port 13a is sealed by the liquid crystal LC adhering to the outer surface of the liquid crystal cell 10 at the immersion end of the liquid crystal bath.
Is wiped off, a sealing material (for example, a photocurable resin) 14 is applied to the liquid crystal injection port 13a, and the sealing material 14 is cured.

[0019]

However, the conventional liquid crystal cell 10 manufactured by the above-described manufacturing method has two substrates 1 and 2.
The outer surface of the sealing material 13 that joins the first and second substrates 1 and 2 is recessed from the side edges of the two substrates 1 and 2. Since there is an extremely narrow groove-shaped portion surrounded by a circle, the liquid crystal injection port 1 of the liquid crystal cell 10 is used when the liquid crystal LC is injected by the vacuum injection method.
When the end provided with 3a is immersed in a liquid crystal bath,
The liquid crystal LC of the liquid crystal bath travels up the groove-like portion around the cell as shown by an arrow in FIG.

For this reason, conventionally, after the injection of the liquid crystal LC and the sealing of the injection port 13a, the cell peripheral surface is cleaned as shown in step A9 of FIG. 9 to remove the liquid crystal LC adhered in the groove. Although removed, the liquid crystal LC that has entered the groove cannot be easily washed away, which lowers the manufacturing efficiency of the liquid crystal cell 10 and increases the cost.

The present invention eliminates the propagation of liquid crystal around the cell when injecting liquid crystal and eliminates the necessity of cleaning the periphery of the cell after injecting the liquid crystal and sealing the injection port, thereby improving manufacturing efficiency and reducing cost. It is an object of the present invention to provide a liquid crystal cell and a method of manufacturing the same.

[0022]

The liquid crystal cell of the present invention comprises:
A pair of substrates are joined via a frame-shaped sealing material having a liquid crystal injection port, and a gap between the substrates outside the joint is formed at least over a region immersed in a liquid crystal bath during liquid crystal injection. It is characterized by being closed by a material.

According to this liquid crystal cell, the gap outside the joint between the two substrates is closed by the sealing material at least over the region immersed in the liquid crystal bath when the liquid crystal is injected. When the liquid crystal is injected into the cell, the liquid crystal in the liquid crystal bath does not travel around the cell due to the capillary phenomenon. Therefore, cleaning of the cell periphery after liquid crystal injection and sealing of the injection port is not required, thereby improving manufacturing efficiency and reducing cost. Can be measured.

Further, the method for manufacturing a liquid crystal cell according to the present invention comprises:
Of a pair of large-sized substrates large enough to collect a plurality of substrates for liquid crystal cells, each of the large-sized substrate surfaces, which is to be a substrate for each liquid crystal cell, is slightly inside the cell from the boundary between these substrate portions. Shifting, printing a frame-shaped sealing material having a liquid crystal injection port, laminating the pair of large substrates via the sealing material, and disposing the paired large substrates on each of the liquid crystals. A step of separating and separating into individual cells at the boundary of the substrate portion of the cell, and crushing and expanding the sealing material by pressing the separated cells;
A gap between the substrates outside the joint between the two substrates to be joined via the sealing material is closed by the sealing material at least over a region immersed in the liquid crystal bath when injecting the liquid crystal, and a gap between the two substrates is set to a predetermined value. The method is characterized by comprising a step of adjusting a cell gap, and a step of curing the crushed and expanded sealing material and joining the two substrates.

That is, in this manufacturing method, after a pair of large substrates superimposed via a sealing material is cut off at the boundary of the substrate portion of each liquid crystal cell and separated into individual cells, the cell gap is adjusted and the sealing material is removed. The substrate is joined by curing.

In this manufacturing method, the cell separation is performed before the cell gap is adjusted, that is, before the sealing material is crushed and expanded so that the gap between the two substrates becomes a predetermined cell gap. In addition, the sealing material is located on the inner side of the cell than the boundary between the portions of the pair of large substrates serving as the substrates of the liquid crystal cells, so that the sealing material does not hinder the cell separation.

In this manufacturing method, since the cell gap is adjusted after the cells are separated, the sealing material is crushed and expanded by the pressure at that time, and at least the gap between the substrates outside the joint between the two substrates is formed by the liquid crystal. Can be covered with the sealing material over the region immersed in the liquid crystal bath during the injection.

For this reason, according to this manufacturing method, when the liquid crystal is injected into the cell by the vacuum injection method after the sealing material is cured and the two substrates are joined, the liquid crystal in the liquid crystal bath is surrounded by the cell by capillary action. Therefore, it is not necessary to clean the periphery of the cell after injecting the liquid crystal and sealing the injection port, so that the production efficiency can be improved and the cost can be reduced.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the liquid crystal cell of the present invention has a gap between the substrates outside the joint between the pair of substrates formed by the sealing material, at least over the region immersed in the liquid crystal bath when the liquid crystal is injected. By closing with the sealing material, the liquid crystal in the liquid crystal bath is prevented from traveling around the cell due to the capillary phenomenon when the liquid crystal is injected into the cell, and the cell periphery is washed after the liquid crystal is injected and the injection port is sealed. Is unnecessary.

Further, the method for manufacturing a liquid crystal cell of the present invention comprises:
As described above, after a pair of large substrates superimposed via a sealing material is cut off at the boundary of the substrate portion of each liquid crystal cell and separated into individual cells, the substrate bonding is performed by adjusting the cell gap and curing the sealing material. By doing so, the gap between the substrates outside the junction of the two substrates is closed with the sealing material at least over the region immersed in the liquid crystal bath when injecting the liquid crystal, and when the liquid crystal is injected into the cell, the liquid crystal in the liquid crystal bath is filled. By preventing the liquid crystal from flowing around the cell due to the capillary phenomenon, it is not necessary to wash the cell periphery after injecting the liquid crystal and sealing the injection port.

In this manufacturing method, the adjustment of the cell gap and the hardening of the sealing material can be performed continuously, so that the liquid crystal cell can be manufactured more efficiently. .

[0032]

1 to 8 show an embodiment of the present invention.
This will be described with reference to FIG. 1 is a partially cutaway front view of the liquid crystal cell, FIG. 2 is an enlarged sectional view taken along line II-II of FIG. 1, and FIG. 3 is an enlarged sectional view taken along line III-III of FIG.

In this liquid crystal cell 10, a pair of transparent substrates 11 and 12 made of glass or the like are joined via a frame-shaped sealing material 13 having a liquid crystal injection port 13a on one side.
The gap between the substrates 11 and 12 outside the joint is closed over the entire periphery of the cell by the sealing material 13, and a region surrounded by the sealing material 13 between the substrates 11 and 12 includes a liquid crystal LC. Is filled, and the liquid crystal inlet 13 a is sealed with a sealing material 14.

The liquid crystal cell 10 of this embodiment is of an active matrix type using, for example, a TFT as a switching element.
The configuration other than the junctions 1 and 12 is the same as that of the conventional liquid crystal cell 10 shown in FIG.

FIG. 4 is a flow chart of a manufacturing process showing a method of manufacturing the liquid crystal cell, FIG. 5 is a cross-sectional view of the liquid crystal cell in the main process, and FIG. 6 is an enlarged front view of a part of the sealing material in FIG. FIG. 7 is an enlarged front view of a part of the sealing material in FIG. 5B, and FIG. 8 is an enlarged front view of a part of the sealing material in FIG.
Is manufactured by the following steps.

First, as shown in step B1 of FIG. 4, and (a) of FIG. 5, and FIG.
One of a pair of large substrates 1 and 2 having a size capable of collecting the sample 12 and having the electrodes and the alignment film formed on the portions to be the substrates 11 and 12 of each liquid crystal cell 10, For example, in FIG. 5, the portions of the lower large-sized substrate 2 which are to be the substrates 11 and 12 of each of the liquid crystal cells 10 are slightly shifted inward from the boundary a between the substrates 11 and 12 so as to be on one side. The frame-shaped sealing material 13 having the liquid crystal injection port 13a is printed by a screen printing method or the like to a thickness somewhat larger than a cell gap d described later.

The sealing material 13 is, for example, a thermosetting adhesive. The sealing material 13 can be used for each liquid crystal cell even after the pre-gap is formed in consideration of the crushing and spreading at the time of forming the pre-gap described later. Printing is performed at a position not to reach the boundary a between the portions of the substrates 11 and 12.

Next, as shown in steps B2 to B4 in FIG. 4, and FIG. 5B and FIG. 7, the pair of large substrates 1 and 2 are overlaid with the sealing material 13 therebetween and pre-pressed. With this, the sealing material 13 is slightly crushed and spread to
2 and a pre-gap d1 which is somewhat larger than a predetermined cell gap, and the two substrates 1 and 2 are temporarily joined by the viscosity of the uncured sealing material 13, and then the pre-pressed state is maintained. The displacement between the substrates 1 and 2 is corrected.

In this case, the sealing material 13 collapses and spreads in accordance with the pre-pressing force. However, if the printing position of the sealing material 13 is set in consideration of the collapse and expansion when forming the pre-gap as described above. The sealing material 13 does not reach the boundary a between the substrates 11 and 12 of each liquid crystal cell 10.

Next, step B5 of FIG. 4 and (c) of FIG.
As described above, the paired large substrates 1 and 2 are separated at the boundary a between the substrates 11 and 12 of each liquid crystal cell 10 to separate them into individual liquid crystal cells 10.

This cell separation is performed by making a cut on the outer surface of both large substrates 1 and 2 along the boundary a using a dicing machine or the like, and cutting both large substrates 1 and 2 along the cut. However, in this case, since the sealing material 13 is located inside the cell 10 from the boundary a, the sealing material 13 does not hinder the cell separation. It can be cut along the cuts with high accuracy.

Next, as shown in step B6 of FIG. 4, and (d) of FIG. 5, and FIG. 8, the separated liquid crystal cell 10 is pressurized with a predetermined pressure, and the sealing material 13 is
The outer portion is slightly outside the side edges of the substrates 11 and 12 (the side edge of the other substrate 12 on the side where the edge of one substrate 11 projects outward beyond the side edge of the other substrate 12). The sealing material 1 is spread over the entire periphery of the cell so that the gap between the substrates outside the joint between the substrates 11 and 12 is extended.
3 and adjust the gap between the two substrates 1 and 2 to a predetermined cell gap d2. Then, the sealing material (thermosetting adhesive) 13 is cured by firing while maintaining the pressurized state. Then, the two substrates 1 and 2 are joined via the sealing material 13.

In this case, both substrates 11, 1 of the liquid crystal cell 10
Since the correction of the displacement of 2 has already been completed in step B4 of FIG. 4, the adjustment of the cell gap d2 and the hardening of the sealing material 13 can be performed continuously.

Thereafter, as shown in steps B7 to B8 of FIG. 4 and (e) of FIG. 5, the inside of the liquid crystal cell 10 (both substrates 1,
A liquid crystal LC is injected and filled into the region surrounded by the sealing material 13 between the two) from the liquid crystal injection port 13a by a vacuum injection method.
Next, the liquid crystal injection port 13a is sealed with a sealing material 14 to complete the liquid crystal cell 10.

The liquid crystal LC is injected into the liquid crystal cell 10 by the vacuum injection method in the same manner as in the prior art, and the sealing of the liquid crystal injection port 13a is performed in the same manner as in the prior art.
The liquid crystal LC adhered to the outer surface of the immersion end of the liquid crystal bath 0 is wiped off, a sealing material (for example, a photo-curable resin) 14 is applied to the liquid crystal injection port 13a, and the sealing material 14 is cured. Do.

According to the liquid crystal cell 10 of this embodiment, the gap outside the joint between the two substrates 11 and 12 is closed by the sealing material 13 over the entire periphery of the cell. When the liquid crystal is injected into the cell, the liquid crystal in the liquid crystal bath does not travel around the cell due to the capillary phenomenon.

That is, the conventional liquid crystal cell 10 has the structure shown in FIG.
As shown in the figure, since the very narrow width groove portion surrounded by the side edges of both substrates and the outer surface of the sealing material 13 is provided on the outer periphery of both substrates 1 and 2, Liquid crystal LC by
When the end of the liquid crystal cell 10 where the liquid crystal injection port 13a is provided is immersed in the liquid crystal bath during the injection of the liquid crystal, the liquid crystal LC of the liquid crystal bath causes the groove-shaped portion around the cell to be indicated by an arrow in FIG. As shown in the figure, the liquid crystal cell 10 of the above embodiment has a gap outside the joint between the substrates 11 and 12 closed by the sealing material 13 over the entire periphery of the cell. Since there is no shape part, the liquid crystal does not rise due to the capillary phenomenon.

Therefore, according to the liquid crystal cell 10 of the above embodiment, it is not necessary to clean the periphery of the cell after injecting the liquid crystal and sealing the injection port, so that the production efficiency can be improved and the cost can be reduced.

Further, in the manufacturing method of the above embodiment, the pair of large substrates 1 and 2 laid one on the other via the sealing material 13 are cut off at the boundary a between the substrates 11 and 12 of each liquid crystal cell 10 to separate the individual cells 10. After the separation, the adjustment of the cell gap d2 and the bonding of the substrates by the curing of the sealing material 13 are performed.

In this manufacturing method, the cell separation is performed before the cell gap d2 is adjusted, that is, before the sealing material 13 is crushed and expanded so that the gap between the substrates 11 and 12 becomes a predetermined cell gap d2. When cell separation is performed, the sealing material 13 is located on the inner side of the cell than the boundary a between portions of the pair of large-sized substrates 1 and 2 serving as the substrates 11 and 12 of each of the liquid crystal cells 10. It does not hinder the separation.

In this manufacturing method, since the cell gap is adjusted after the cell separation, the sealing material 13 is crushed and expanded by the pressure at that time, and the gap between the substrates outside the joint between the substrates 11 and 12 is formed. The gap can be closed by the sealing material 13 over the entire circumference of the cell.

Therefore, according to this manufacturing method, when the liquid crystal LC is injected into the cell 10 by the vacuum injection method which is performed after the sealing material 13 is cured and the two substrates 11 and 12 are joined, Does not travel around the cell due to the capillary phenomenon, so that cleaning around the cell after the injection of the liquid crystal and the sealing of the injection port is not required, so that the production efficiency can be improved and the cost can be reduced.

In this manufacturing method, as described above, the adjustment of the cell gap and the sealing material 13 are performed.
Can be continuously performed, and therefore, the liquid crystal cell 10 can be manufactured more efficiently.

In the above embodiment, both substrates 11 and 12 are used.
The gap between the substrates outside the junction is closed with the sealing material 13 over the entire circumference of the cell. However, if there is no groove on the cell peripheral surface in the area immersed in the liquid crystal bath when injecting the liquid crystal, the cell periphery is closed. The liquid crystal does not propagate to the surface due to the capillary phenomenon.

Therefore, of the gaps between the substrates outside the joint between the substrates 11 and 12, only the gap immersed in the liquid crystal bath when injecting the liquid crystal may be closed with the sealing material 13. By closing the gap between the substrates at least over the region immersed in the liquid crystal bath with the sealing material 13, the liquid crystal is prevented from rising around the cell due to the capillary phenomenon at the time of liquid crystal injection, and the liquid crystal injection and injection port sealing are prevented. Since the cleaning around the cell after the stoppage is unnecessary, the production efficiency can be improved and the cost can be reduced.

[0056]

According to the liquid crystal cell of the present invention, the gap outside the joint between the two substrates is closed by the sealing material at least over the region immersed in the liquid crystal bath when the liquid crystal is injected. When injecting the liquid crystal into the cell by the injection method, the liquid crystal in the liquid crystal bath does not travel around the cell due to the capillary phenomenon. And cost can be improved.

Further, the method for manufacturing a liquid crystal cell according to the present invention comprises:
After separating a pair of large substrates superimposed via a sealing material at the boundary of the substrate portion of each liquid crystal cell and separating the cells into individual cells, adjusting the cell gap and bonding the substrates by curing the sealing material are performed. In this manufacturing method,
Since the cell separation is performed before the cell gap is adjusted, that is, before the sealing material is crushed and expanded so that the gap between the two substrates becomes a predetermined cell gap, when performing the cell separation,
The sealing material is located on the inner side of the boundary between the portions of the pair of large substrates serving as the substrates of the liquid crystal cells, so that the sealing material does not hinder the cell separation.

In this manufacturing method, since the cell gap is adjusted after the cells are separated, the sealing material is crushed and expanded by the pressure at that time, and at least the gap between the substrates outside the joint between the two substrates is reduced by the liquid crystal. Can be covered with the sealing material over the region immersed in the liquid crystal bath during the injection.

For this reason, according to this manufacturing method, when the liquid crystal is injected into the cell by a vacuum injection method after the sealing material is cured and the two substrates are joined, the liquid crystal in the liquid crystal bath is formed around the cell by capillary action. Therefore, it is not necessary to clean the periphery of the cell after injecting the liquid crystal and sealing the injection port, so that the production efficiency can be improved and the cost can be reduced.

In this manufacturing method, the adjustment of the cell gap and the hardening of the sealing material can be performed continuously, so that the liquid crystal cell can be manufactured more efficiently. .

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a liquid crystal cell showing one embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along the line II-II of FIG.

FIG. 3 is an enlarged sectional view taken along the line III-III of FIG. 1;

FIG. 4 is a flow chart of a manufacturing process showing a method for manufacturing the liquid crystal cell.

FIG. 5 is a sectional view of a liquid crystal cell in a main step of the manufacturing method.

FIG. 6 is an enlarged front view of a part of the sealing material in FIG.

FIG. 7 is an enlarged front view of a part of the sealing material in FIG. 5 (b).

FIG. 8 is an enlarged front view of a part of the sealing material in FIG.

FIG. 9 is a flowchart of a manufacturing process showing a conventional method for manufacturing a liquid crystal cell.

FIG. 10 is a sectional view of a liquid crystal cell in a main step of a conventional manufacturing method.

FIG. 11 is a diagram showing a method of injecting liquid crystal into a liquid crystal cell.

FIG. 12 is a partially cutaway front view of a liquid crystal cell manufactured by a conventional manufacturing method.

[Explanation of symbols]

 1, 2, large substrate 10: liquid crystal cell 11, 12, substrate 13: sealing material 13a: liquid crystal injection port 14: sealing material

Claims (3)

[Claims] 1. A pair of substrates are joined via a frame-shaped sealing material having a liquid crystal injection port, and a gap between the substrates outside the joint is immersed in a liquid crystal bath at least at the time of injecting liquid crystal. A liquid crystal cell, wherein the liquid crystal cell is covered with the sealing material over an area. 2. A pair of large substrates which can collect a plurality of substrates for a plurality of liquid crystal cells, a portion of one of the large substrates, which is to be a substrate of each liquid crystal cell, is located at a position larger than a boundary between these substrate portions. A step of printing a frame-shaped sealing material having a liquid crystal injection port slightly shifted to the inside of the cell; a step of overlapping the pair of large substrates via the sealing material; and a pair of the superposed large substrates. Separating each cell at the boundary of the substrate portion of each of the liquid crystal cells, and pressing the separated cells to crush and expand the sealing material, and joining both substrates via the sealing material. The sealing material covers at least an area immersed in a liquid crystal bath at the time of injecting liquid crystal, and adjusts a gap between the two substrates to a predetermined cell gap. When manufacturing method of a liquid crystal cell, characterized the step of bonding the both substrates by curing the crushed spread sealant, that it consists. 3. The method according to claim 2, wherein the adjustment of the cell gap and the curing of the sealing material are performed continuously.