JP3105747B2 - Liquid crystal display device and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device and a method for manufacturing the same. More specifically, the present invention relates to a liquid crystal display device using a liquid crystal used for a display, an optical shutter, and the like, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Among liquid crystal devices, a polymer / liquid crystal composite is used which has an advantage that it can be easily manufactured because no alignment treatment is required and that a bright display is possible because no polarizing plate is required. Recently, polymer-dispersed liquid crystal elements have attracted attention as displays.

In general, a polymer-dispersed liquid crystal device is a device in which a liquid crystal polymer composite in which liquid crystal is dispersed and held in a matrix made of a polymer material composition is sandwiched between a pair of substrates with electrodes. The structure is such that the ordinary light refractive index and the refractive index of the polymer matrix substantially match.
That is, in the state where no voltage is applied, the liquid crystal is aligned near the interface with the polymer matrix and substantially parallel to the interface. When light perpendicular to the substrate enters in this state, the refractive index of the polymer matrix and the refractive index of the liquid crystal become different, and thus light is scattered at the interface. When a voltage is applied between the substrates, in the case of a nematic liquid crystal having a positive dielectric anisotropy, the liquid crystal molecules are aligned almost perpendicularly to the electrode surface, and the incident light reflects the refractive index of the polymer matrix and the ordinary light of the liquid crystal. Since the refractive index is almost the same, light is transmitted without being scattered. An optical shutter function is possible by utilizing the above properties.

[0004]

However, since no polarizing plate is used, the contrast at the time of 0N-OFF tends to be inferior to a display mode using a conventional polarizing plate. The contrast defined here indicates the ratio of the amount of light reaching the light receiving unit when the electric field is ON and the amount of light reaching the light receiving unit when the electric field is OFF. The higher the contrast, the better the image quality.

In addition, since this device is generally manufactured using a volatile monomer, it is difficult to change the atmospheric pressure as in the case of vacuum injection, as in the case of the polarizing plate mode, or even at normal pressure. There are many issues such as remaining air bubbles.

[0006] In general, since a volatile monomer is used for a composition to be injected, it is difficult to inject the liquid crystal element by a conventional vacuum injection method due to volatilization of the composition. In particular, when injecting at least a mixture of a liquid crystal material and a polymer resin material as a composition, such as a polymer-dispersed liquid crystal, it is difficult to produce the composition by pressure fluctuation due to problems such as volatilization of the monomer. Unevenness was easy to occur. In addition, both the normal pressure injection and the conventional methods are unstable, with bubbles remaining in the device. As described above, there are many problems in manufacturing a polymer-dispersed liquid crystal element, particularly in injection.

An object of the present invention is to solve these problems and to provide a uniform liquid crystal display element and a method for manufacturing the same.

[0008]

In order to solve the above-mentioned problems, a first liquid crystal display device of the present invention comprises a pair of electrode-attached substrates, at least one of which is transparent, in which the electrode sides of the substrates face each other. A liquid crystal display element in which polymer-dispersed liquid crystal is present in empty cells formed between substrates, and a display surface of the liquid crystal display element is rectangular; Along with providing two or more openings without a seal material in a seal portion formed along the end of each side of the substrate, the pair of electrode-containing substrates includes a large substrate having a large area and a small substrate having a small area, On the large substrate,
The height of the small substrate from the edge of the small substrate to the edge of the large substrate
And two lower weirs are provided between the two weirs or below the two weirs as inlets for a composition containing a polymer-forming material and a liquid crystal. Features.

In the liquid crystal display, it is preferable that the element openings are formed at four corners of the substrate. Further, in the liquid crystal display, the seal portion is perpendicular to the injection direction.
In each of the sides, it is preferable that the opening is formed by at least one portion where no seal material is present.

[0010] In the liquid crystal display, the sealing portion is formed by tree fat in dotted, it is preferable that an opening is formed. In the liquid crystal display, it is preferable that empty cells will be dam portion so as not written Ri times on the opposite side is provided from the composition across the injection side edge provided with said injection port.

In the liquid crystal display, it is preferable that the weir is provided above the injection side with respect to two sides perpendicular to the injection part. In the liquid crystal display is injection port formed in the opening of one corner of an empty cell, to two of the corners adjacent to that one corner, the dam comprising a tree fat material is provided Is preferred.

In the liquid crystal display, at least one of the pair of transparent substrates with electrodes has a shape memory effect in which a glass transition temperature (Tg point) or a softening point is lower than an ambient temperature of use of the element. It is preferable that a thermoplastic polymer having the following is formed. Further, in the liquid crystal display, the substrate has a shape memory effect in which a glass transition temperature (Tg point) or a softening point is lower than the use environment temperature of the element on at least one electrode side substrate of the electrode-attached substrate.
Thermoplastic polymers with is a coating film formed, the heat glass transition temperature (Tg point) of the thermoplastic polymer or the element is heated a predetermined time, uniaxial stretching of the thermoplastic polymer is released, that is the non-stretched state Is preferred.

Next, a second liquid crystal display device according to the present invention comprises:
At least one of which is formed a thermoplastic polymer layer having a shape memory effect in the at least one electrode side substrate surface of the substrate with a pair of transparent electrodes, the injection of the thermoplastic polymer layer is uniaxially stretched, the composition on the surface The composition is injected between the substrates, the injection port is sealed with a sealing resin, and then the thermoplastic polymer is heated to a glass transition temperature (Tg point) or more for a certain time. It is characterized in that the uniaxial stretching is released and the film is in a non-stretched state.

In the above liquid crystal display device, the glass transition temperature (Tg) of the thermoplastic polymer having a shape memory effect
(Point) is preferably higher than the use environment temperature of the element.
In the liquid crystal display device, the thermoplastic polymer having a shape memory effect is preferably polyurethane. In the liquid crystal display device, it is preferable that the composition to be injected into the empty cell comprises a mixture of a liquid crystal material and a polymer material.

Next, in a first method of manufacturing a liquid crystal display element according to the present invention, a gap is formed between a pair of substrates with electrodes, at least one of which is transparent, with the electrode sides facing each other using a resin material as a sealing material. Then, an opening of an inlet and an outlet is provided in a portion without a sealing material to form an empty cell, and a composition containing a polymer-forming material and a liquid crystal is placed in an empty cell formed between the substrates. A method for manufacturing a liquid crystal display element by injecting, wherein the pair of electrode substrates use a relatively large large substrate and a relatively small small substrate, on the large substrate,
The height of the small substrate from the edge of the small substrate to the edge of the large substrate
Provided two high weir portion than is said the two between the weir portions or the two of the lower surface of the inlet from the weir portion, the composition comprising a liquid crystal polymer forming material from the inlet An object is injected into the gap between the substrates at normal pressure.

Next, in a second method for manufacturing a liquid crystal display element according to the present invention, a gap is provided between substrates by using a resin material for a sealing material with the electrode sides of a pair of electrodes-attached substrates at least one of which is transparent. At the same time, at least an opening for an inlet and an outlet are provided to form empty cells, and a composition containing a polymer-forming material and liquid crystal is injected into the empty cells formed between the substrates to display a liquid crystal. A method for manufacturing an element, wherein openings are provided in four corners of a substrate in the seal portion, or openings are formed in two sides perpendicular to an injection direction by at least one or more portions each having no seal material. Or the sealing portion is formed of resin in a dotted line shape, and the pair of substrates with electrodes use a large substrate having a relatively large area and a small substrate having a relatively small area, and the small substrate is provided on the large substrate. From the edge of the board Provided two high weir portion than the height of the small substrate <br/> to the edge of the large substrate, and the two between the weir portions or the two of the lower surface of the inlet from the weir portion, A composition containing a polymer-forming material and a liquid crystal is injected from the injection port into the space between the substrates at normal pressure.

In the first and second methods, the weir portion is provided above the injection side with respect to two sides perpendicular to the injection portion and the empty cell is immersed in a liquid composition containing a liquid crystal material. Therefore, it is preferable to inject into the empty cell.

In the first and second methods,
Equipped with an infrared sensor , a thermal sensor or an optical sensor for detecting the liquid level of the composition , and the immersion position of the empty cell so that the height of the liquid level of the composition is always located at the height at which it is injected into the empty cell. It is preferable that the composition is injected by providing a weir portion at the seal end in the direction perpendicular to the side where the outlet is provided near the outlet.

In the first and second methods,
It is preferable to inject the composition after protecting the terminal portions of the electrodes of the substrate and the outer surface of the substrate. Further, in the first and second methods, an opening at one corner of the empty panel is used as an inlet, and weirs made of a polymer resin material are provided at two corners adjacent to the one corner. provided, the injection side is placed below the dam portion, it is preferable to inject immersed in liquid composition containing a liquid crystal material.

Next, according to a third method of manufacturing a liquid crystal display device of the present invention, a thermoplastic polymer layer having a shape memory effect is formed on at least one electrode-side substrate surface of at least one of a pair of transparent substrates with electrodes. Then, rubbing the thermoplastic polymer layer in the direction in which the composition is injected,
The polymer layer is subjected to uniaxial stretching, a composition is injected from an injection port between the substrates to form an element, and after the injection is completed, so that the composition does not leak from the element, sealing with a sealing resin, Glass transition temperature (Tg point) of the thermoplastic polymer
As described above, the device is manufactured by heating the element for a certain period of time, releasing the uniaxial stretching of the thermoplastic polymer to a non-stretched state, and then lowering the temperature. In the third method, when injecting the liquid crystal composition, it is preferable that the composition and the substrate to be injected are heated to a certain temperature and then injected. Wherein in the third method, it is preferable intends rows <br/> normal pressure injection.

[0021]

In the liquid crystal display device of the present invention, the display surface of the liquid crystal display device is rectangular, and the seal formed at the end of each side of the substrate has two or more openings from which the seal material has been cut.
A material such as a composition such as a volatile monomer can be injected at normal pressure, and a material such as a volatile monomer can be easily injected into an empty cell without bubbles and uneven injection, and a uniform element can be obtained. That is, since a pressure change such as a decompression operation as in the past is not used, a liquid crystal display element that can be injected without affecting the composition and can perform uniform display can be manufactured by a simple operation at a low cost.

In the above structure, since the openings are provided at the four corners of the substrate, it is possible to manufacture a uniform element without unevenness and without bubbles. In the above configuration, since the opening is formed at least at one or more portions where no sealing material is provided on two sides perpendicular to the injection direction of the sealing portion, a uniform element having no unevenness and no bubbles is manufactured. can do. In the above configuration, since the sealing portion is formed of a polymer resin in a dotted line, it is possible to manufacture a uniform element without unevenness and without bubbles.

In the present invention, weirs are provided at both ends of the side of the empty cell where the inlet is provided so as to prevent the composition from flowing from the injection side to the opposite side, particularly to the outlet, and the inlet is provided. The composition containing the liquid crystal material is stored in a portion surrounded by a portion and a weir (stopper), or the composition is held in a portion provided with the inlet and the portion surrounded by the weir. The composition is continuously supplied so that the composition is not lost until the pouring is completed. With this configuration, even at normal pressure, materials such as the composition can be easily and quickly injected into empty cells without bubbles and uneven injection, and uniform high-quality devices can be supplied. It is. That is, since pressure fluctuation such as decompression operation as in the past is not used, the composition can be injected without affecting the composition, and the production cost can be reduced.

According to the structure of the device, weirs are provided at both ends of the side where the inlet is provided with the empty cell so as to prevent the composition from flowing from the injection side to the opposite side, particularly to the outlet. Therefore, it is possible to obtain an element of uniform quality without bubbles and uneven injection.

According to the present invention, weirs are provided at both ends of the side where the inlet is provided so as to prevent the composition from flowing from the injection side to the opposite side, particularly to the outlet, and the seal is formed. The opening may be provided at four corners (corners) of the substrate, or the opening may be provided at least at one or more places where there is no seal material at each of two sides perpendicular to the injection direction, or a dotted line polymer Since the empty cell is injected into the composition reservoir that stores the composition containing the liquid crystal material formed of the resin, the material such as the composition can be easily and quickly and uniformly injected into the empty cell without leaving air bubbles. , An element of excellent uniform quality can be manufactured at low cost.

According to the manufacturing method having the above-described structure, the weir portion is provided above the injection side with respect to two sides perpendicular to the injection portion, and the empty cell is immersed in a composition reservoir containing a liquid crystal material. Thus, a material such as a composition can be easily and quickly and uniformly injected into the empty cell without leaving air bubbles, and an element of excellent uniform quality can be manufactured at low cost.

Further, according to the liquid crystal display device having the above-described structure, the weir is provided above the injection side with respect to two sides perpendicular to the injection part and is immersed in a composition reservoir containing a liquid crystal material. Since the liquid crystal material is injected into the empty cells, it is possible to obtain an excellent, uniform quality, low-cost element free of air bubbles.

The composition reservoir is equipped with an infrared sensor, a thermal sensor, or an optical sensor, and the empty cell is set so that the liquid level of the composition reservoir is always positioned at the level where the liquid is poured into the empty cell. The immersion position is controlled, and the dam is provided at the seal end in the direction perpendicular to the side provided with the discharge port close to the discharge port, and the composition is injected. A high quality device can be easily manufactured at low cost.

In the structure of the manufacturing method, since the composition is injected after protecting the terminal portion of the electrode of the substrate and the outer surface of the substrate, the electrode can be injected uniformly without causing contact failure and without remaining bubbles. A uniform high-quality device can be easily manufactured at low cost.

[0030] In the structure of the manufacturing method, an opening at one corner of the empty cell is used as an injection port, and dams made of a polymer resin material are provided at two corners adjacent to the one corner,
Since the injection side is arranged below the weir and is immersed in the composition reservoir containing the liquid crystal material for injection, the injection speed can be increased, the air can be injected without bubbles, and the device of uniform quality can be easily manufactured at low cost. It can be manufactured with.

In the structure of the display element, an injection port is formed at one corner of the empty cell, and two corners adjacent to the corner are provided with a weir portion made of a polymer resin material. Is provided, and the composition containing the liquid crystal material is injected into the empty cell, so that a uniform, high-quality, low-cost device free of bubbles and unevenness can be obtained.

According to the production method of the present invention, a thermoplastic polymer layer having a shape memory effect is formed on at least one electrode-side substrate surface of at least one of a pair of electrodes-attached substrates, and a direction in which the composition is injected. On, rubbing the thermoplastic polymer layer, subjected to uniaxial stretching, to form a device by injecting the composition from the injection port between the substrates, after the injection is completed, so that the composition does not leak from the device, Sealing with a sealing resin, the glass transition temperature (Tg) of the thermoplastic polymer
Point) As described above, the device is heated for a certain period of time, the uniaxial stretching of the thermoplastic polymer is released, and the thermoplastic polymer is made to be in a non-stretched state, and then the temperature is lowered. Therefore, the injection speed can be increased, and uniform injection can be performed without bubbles. It is possible to easily and inexpensively manufacture a device of uniform quality, which can improve the retention ratio of the polymer liquid crystal and has excellent voltage holding characteristics capable of driving at a low voltage.

In the display element of the present invention, a thermoplastic polymer layer having a shape memory effect is formed on at least one electrode-side substrate surface of at least one of a pair of electrodes-attached substrates, and the thermoplastic polymer layer is uniaxially stretched. The surface has been subjected to rubbing in the direction in which the composition is injected, the composition is injected between the substrates, the injection port is sealed with a sealing resin, then the thermoplastic polymer is It is heated to a glass transition temperature (Tg point) or higher for a certain period of time, and is uniaxially stretched to be in a non-stretched state. in this way,
By forming a thermoplastic polymer layer having a shape memory effect on the substrate surface, material such as a composition can be quickly and uniformly injected without bubbles, and the retention of a polymer-dispersed liquid crystal can be improved. An element of uniform quality with reduced driving voltage can be easily obtained at low cost.

In the structure of the display device, since the glass transition temperature (Tg point) of the thermoplastic polymer having the shape memory effect is higher than the ambient temperature of use of the device, the injection of materials such as a composition can be performed quickly. It can be performed uniformly without leaving bubbles, the retention rate of the polymer dispersed liquid crystal can be improved, and a device of uniform quality with reduced driving voltage can be easily obtained at low cost.

In the structure of the display element, a polymer having a glass transition temperature (Tg point) or a softening point equal to or lower than the use environment temperature of the element is formed on at least one electrode side substrate of at least one of the pair of transparent electrodes. A coating is formed. As described above, by using the thermoplastic polymer, the injection of the material such as the composition can be performed speedily and uniformly without leaving any bubbles, the retention of the polymer-dispersed liquid crystal can be improved, and the driving voltage has been reduced. An element of uniform quality can be easily obtained at low cost.

In the structure of the display element, since the thermoplastic polymer having the shape memory effect is polyurethane, the use of the thermoplastic polymer allows the material such as the composition to be quickly and uniformly injected without bubbles. In addition, by forming a thermoplastic polymer layer on the substrate surface, the retention of the polymer-dispersed liquid crystal can be improved, and the driving voltage is excellent in voltage holding characteristics,
An element of uniform quality can be easily obtained at low cost.

In the above display device, a polymer having a glass transition temperature (Tg point) or a softening point equal to or lower than a use environment temperature of the element is coated on at least one electrode side substrate of the panel substrate. The device is heated for a certain period of time at a temperature equal to or higher than the glass transition temperature (Tg point) of the thermoplastic polymer, and the uniaxial stretching of the thermoplastic polymer is released to be in a non-stretched state. Injection can be performed quickly and uniformly without leaving any bubbles, and by forming a thermoplastic polymer layer on the substrate surface, the retention of polymer-dispersed liquid crystal can be improved and the driving voltage is reduced. A quality device can be easily obtained at low cost.

In the structure of the display element, since the composition to be injected into the empty cell is a mixture of a liquid crystal material and a polymer material, the injection of the material such as the composition can be performed quickly and uniformly without leaving any bubbles. The injected one is obtained, and the thermoplastic polymer layer is further formed on the substrate surface, so that the retention of the polymer-dispersed liquid crystal can be improved,
A device of uniform quality with reduced driving voltage can be easily obtained at low cost.

In the structure of the manufacturing method, the composition and the substrate to be injected are heated after being heated to a certain temperature when the composition is injected. Excellent retention characteristics, high injection speed, uniform injection with no air bubbles remaining, and uniform quality of the element can be easily manufactured at low cost.

In addition, in the structure of the manufacturing method, since the injection is performed under normal pressure, the retention of the polymer-dispersed liquid crystal can be improved, the voltage holding characteristics can be improved, the injection speed can be increased, and the uniformity can be obtained without bubbles. It can be implanted and a device of uniform quality can be easily manufactured at low cost.

As described above, according to the liquid crystal display device and the method of manufacturing the same of the present invention, there are no bubbles and uneven injection.
A uniform panel can be manufactured. In addition, since the liquid crystal and the composition containing a polymerizable material and the like can be easily injected under normal pressure, the cost can be significantly reduced. Also, by using the thermoplastic polymer of the present invention,
Injection of a material such as a composition can be performed quickly and safely.

According to the liquid crystal display device of the present invention, it is possible to improve the retention of the polymer dispersed liquid crystal and to lower the driving voltage. The method for producing a liquid crystal display device of the present invention is particularly effective for producing a polymer-dispersed liquid crystal. At least a composition containing a liquid crystal and a composition containing a photopolymerizable material is mixed, and a mixture obtained by dissolving the mixture is simply obtained. And a photopolymerizable phase separation method in which light is separated into a polymer material and a liquid crystal by light (the phase can be separated using a thermopolymerizable material). The photopolymerizable composition is composed of a polymerizable organic compound such as a prepolymer or a monomer and a photoinitiator, and may be mixed with a polymer compound, an inorganic filler, or an organic additive for adjusting the composition. Further, a thermal polymerization initiator may be mixed. As the prepolymer and the monomer, a compound having a vinyl group is suitable, and an acrylic compound is preferable. For example, t-butyl acrylate, 2-ethylhexyl acrylate, 2-methoxyethyl acrylate, 2-phenoxyethyl acrylate, cyclohexyl acrylate, trimethoxypropane triacrylate, neopentyl glycol diacrylate, 1,6-hexanediol diacrylate, trimethylol Monomers such as propane triacrylate and trade names: MANDA, TC-110, HX-22
Nippon Kayaku polyfunctional acrylates such as O.HX-620 and commercially available prepolymers such as polyester acrylate, epoxy acrylate, polyurethane acrylate and polyether acrylate can be used alone or in combination. Examples of the photoinitiator include benzoin methyl ether, benzoin isopropyl ether, benzoin isobutyl ether, benzophenone, benzylidenemethyl ketal, 2,2-diethoxyacetophenone,
-Hydroxy-2-methyl-1-phenylpropane-1
-ON is suitable. In addition to the radically polymerizable composition, a cationically polymerizable epoxy resin composition can be used. The liquid crystal material used in the present invention has a dielectric anisotropy capable of controlling a director direction by a voltage and has a refractive index anisotropy. . Further, it is possible to mix an additive such as a dye into the liquid crystal material.

[0043]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific examples of the present invention will be described below. However, the present invention is not limited to these examples.

Example 1 17.6 wt% of 2-ethylhexyl acrylate (manufactured by Nacalai Tesque, Inc.) as a monomer and 1.93 wt% of Biscoat # 3700 (manufactured by Osaka Organic Chemical Industry) as a prepolymer As a photocuring initiator Darocur1173 (Merck) 0.07wt%
TL205 [NI p
oint = 87 ° C., ne = 1.744, no = 1.527] (manufactured by Merck Japan K.K.) was mixed to obtain a composition.

As shown in FIG. 1, a pair of substrates with electrodes 3,
The electrode surfaces of No. 4 are opposed to each other, and an epoxy-based sealing material and struct bond (manufactured by Mitsui Toatsu Co., Ltd.) are provided at the four corners (corners) with a seal pattern at the four corners (corners) via a spacer of 13.0 μm between the substrates. To form an empty cell.

The concrete description of the empty cell formation is as follows.
As shown in FIG. 1, rectangular substrates having different sizes and sizes are opposed to each other. The size on the large substrate 3 side was 59 mm × 70 mm, and the size on the small substrate 4 side was 49 mm × 65 mm. 1.5 mm from the short-axis side (short side) substrate ends 4b and 4c of the small substrate 4, respectively, from the long-axis side (long side) substrate ends 4a and 4a.
A long axis direction seal portion 1a was formed from a position of 0.5 mm. Similarly, the short axis side seal is 1.5 mm from the long axis side (long side) substrate end 4a of the small substrate 4 and the short axis side substrate end 4a.
b, 4c, the seal portion 1b in the short axis direction from the position of 0.5 mm
Was formed. The seal width was 0.4 mm. This seal part 1
The substrate on which a and 1b were formed was heated at 90 ° C. for 10 minutes. Subsequently, the substrates were bonded to each other, pressed by a vacuum packing machine, and then heated at 150 ° C. for 2 hours. This resulted in an empty cell. 11 is a seal opening.

With respect to this empty cell, as shown in FIG.
In the short end (short side) portion 4b on the injection side (A), Loctite 352A (manufactured by Nippon Loctite Co., Ltd.) is slightly higher than the height of the small substrate 3 up to the substrate end 3b on the large substrate 3;
It was formed to a thickness of about 1 mm, and was cured by irradiating it with ultraviolet light (350 nm) at 55 mW / cm ² for 90 seconds to form dams 2 and 2.

Subsequently, the composition 6 was supplied and stored in an injection section (composition supply section) 5 surrounded by the weir sections 2 and 2 until the injection was completed. During this implantation, the temperature of the substrate and the composition was kept at 25 ° C.

After injecting the composition into the entire panel, the composition was irradiated with ultraviolet rays (30 mW / cm ² for 3 minutes) in an environment maintained at 25 ° C.
An element was obtained. The device thus obtained was a uniform panel (with uniform in-plane luminance) as a whole, without unevenness, and without bubbles.

The dams 2 and 2 were not limited to Loctite 352A, and the same results were obtained with other UV-curable resins and thermosetting resins. The sealing material is not limited to struct bond, and similar results were obtained with other resins.

The sizes of the substrates 3 and 4 are not limited to the above, and the size of the large substrate 3 is 100 mm × 150 mm.
Similarly, even when a device having a size of 90 mm × 145 mm on the side of the small substrate 4 was used, an element having no unevenness and having no remaining bubbles could be obtained.

(Comparative Example 1) As in Example 1, the composition volatilized when vacuum injection was attempted instead of a seal pattern in which the four corners (corners) were cut.
Also, if normal pressure injection is attempted without providing a weir portion and a four-corner cut seal pattern, the composition wraps around to the side opposite to the injection side, closes the discharge port, and may leave air bubbles. Yield was bad.

Example 2 As shown in FIG. 2, substantially the same seal patterns 1a, 1a, 1b, and 1c as in Example 1 and dams 2 and 2 were formed.
The empty cells were formed in the same manner as in Example 1, specifically, as shown in FIG.

The size on the large substrate 3 side was 59 mm × 70 mm, and the size on the small substrate 4 side was 49 mm × 65 mm. 2.5 mm from the short-side substrate ends 4b and 4c of the small substrate 4,
The seal portions 1a, 1a in the long axis direction were formed from the position 0.5 mm from the long axis side substrate end 4a of the large substrate 3. Similarly, the short axis side seal is 2.5 mm from the long axis side substrate end 4b of the small substrate 4,
Seal portions 1b and 1c in the short axis direction were formed from a position 0.5 mm from the short axis side substrate end 4a. The seals at the four corners (corners) are 1 mm away from the long and short axis seal ends (opening 1 m
m) to seal portions 1d, 1d, 1d, 1d as shown in FIG.
Was formed. The seal width was 0.4 mm. The substrates 3 and 4 on which the sealing material was formed were heated at 90 ° C. for 10 minutes. Subsequently, the substrates were bonded to each other, pressed by a vacuum packing machine, and then heated at 150 ° C. for 2 hours. by this,
I got an empty cell.

The dams 2 and 2 were formed in the same manner as in Example 1.
By the same injection method as in Example 1, a polymer-dispersed liquid crystal was produced. As a result of this example, a uniform panel (element) was obtained as in Example 1. In addition, the uniformity of the panel cell thickness in the empty cell state was better in this seal pattern than in Example 1, and there was almost no interference fringe. The size of the substrate, the position of the weir, and the like are not limited to those described above as described in Example 1. The size of the large substrate is 100 mm × 150 mm, and the size of the small substrate is 90 mm.
Similarly, an element having no unevenness and having no air bubbles was able to be obtained even when the element having a size of 145 mm was used.

Example 3 As shown in FIG. 3, a seal pattern was formed in the same manner as in Example 2, and a dam was provided as in FIG. The empty cell was formed in the same manner as in the first embodiment, specifically, as shown in FIG. 3, substrates 3 and 4 having different sizes and sizes were opposed to each other.

The size on the large substrate 3 side was 59 mm × 70 mm, and the size on the small substrate 4 side was 49 mm × 65 mm. From the short-axis-side substrate ends 4b and 4c of the small substrate 4, 1.
The seal portion 1a in the long axis direction was formed at a position of 0.5 mm from the long axis side substrate end 4a at 5 mm. Similarly for the short shaft side seal,
Seal portions 1b and 1c in the short-axis direction were formed at positions 1.5 mm from the long-side substrate end 4a of the small substrate 4 and 0.5 mm from the short-axis side substrate ends 4b and 4c, respectively. Further, at the four corners (corners), the short-axis / long-axis substrate ends 4a, 4
A dot-shaped seal 1e, 1e, 1e, 1e having a diameter of 0.5 mm was formed at a position 0.5 mm from b as shown in FIG. The seal width was 0.4 mm. The substrate on which the sealing material is formed is 9
After heating at 0 ° C. for 10 minutes, the substrates 3 and 4 were bonded together and pressed by a vacuum packing machine.
Heated for hours. Thus, an empty cell was obtained.

As shown in FIG. 3, the dams 2 and 2 were formed from the edge of the small substrate to the edge of the large substrate in the same manner as in Example 1. As a result of this example, the injection speed was slightly higher than in Example 2, the injection was completed, and a uniform panel could be obtained. Also, the size of the substrate is not limited to the above, and the size of the large substrate 3 side is 100 mm × 150 mm and the size of the small substrate 4 side is 90 mm × 145 mm. An element having no bubbles and no air bubbles was able to be obtained.

(Example 4) As in Example 1, the seal pattern has no seals at the four corners as shown in FIG. 4, and further, one seal opening is provided on each short side, and the weir is also shown in FIG. Example 1
The same production was performed. As in Example 1, the empty cells were formed specifically by facing substrates having different sizes and sizes one by one as shown in FIG.

The size on the large substrate 3 side was 59 mm × 70 mm, and the size on the small substrate 4 side was 49 mm × 65 mm. From the position of 1.5 mm from the short-side substrate end 4 b of the small substrate 4 and 0.5 mm from the long-axis substrate end 4 a, the sealing portion 1 in the long-axis direction
a was formed. Similarly, the short-axis-side seals 1b and 1c are 1.5 mm from the long-axis substrate end 4a of the small substrate 4 and 0.5 mm from the short-axis substrate ends 4b and 4c.
b, 1c were formed. At the center of the short shaft seals 1b and 1c, a 1 mm opening 11 was provided as shown in FIG. The seal width was 0.4 mm. The substrate on which the sealing material is formed is 90
After heating at 10 ° C. for 10 minutes, the substrates were stuck together and pressed by a vacuum packing machine, and then heated at 150 ° C. for 2 hours. Thus, an empty cell was obtained.

The dams 2 and 2 were formed in the same manner as in Example 1.
By the same injection method as in Example 1, a polymer-dispersed liquid crystal was produced. As a result, the injection speed was higher than in Example 3, and the injection was completed, whereby a uniform panel could be obtained.

(Example 5) As in Example 4, the seal pattern has no seals at the four corners as shown in FIG. 5, and three seal openings 11, 11 and 11 are provided on the short-axis sides 1b and 1c at 1 mm each. The dams 2 and 2 were also provided as shown in FIG.

As a result of this embodiment, the embodiment 4
The injection speed was high, the injection was completed, and a uniform panel could be obtained. Also, the size of the substrate is not limited to the above as in the case of the first embodiment, and the size on the large substrate side is 300 mm × 350 mm.
In the same manner, even when a small substrate having a size of 290 mm × 345 mm on the small substrate side was used, it was possible to obtain an element without unevenness and without bubbles.

(Embodiment 6) In contrast to Embodiment 5, the condition that the short axis and the long axis are reversed, as shown in FIG. 6, the seal patterns are sealed on the long axis sides 1a and 1a, respectively.
The openings 11, 11, 11 are provided in three places with openings of 1 mm, and the weirs 2, 2 are also provided at both ends of the long axis (side) along the line extending the short side edge in the same manner. The same fabrication as in Example 5 was performed.

As a result of this embodiment, the fifth embodiment is more improved than the fifth embodiment.
The injection speed was high, the injection was completed, and a uniform panel could be obtained. The size of the substrate is not limited to the above as described in the first embodiment, and the size of the large substrate 3 is 300 mm × 350 mm.
In the same manner, even when a substrate having a size of 290 mm × 345 mm on the small substrate 4 side was used, the injection was completed faster than in Example 5, and an element having no unevenness and having no remaining bubbles could be obtained. .

(Example 7) A seal pattern was provided as shown in FIG. 7, and dams 2 and 2 were also provided as shown in FIG. as a result,
Injection was possible at the same injection speed as in Example 6, and a uniform panel was obtained. Further, the sealing portions 1a, 1b, 1c
Was also able to be manufactured without unevenness. As in the case of the sixth embodiment, the injection is completed as quickly as in the sixth embodiment in the same manner as in the sixth embodiment even when the size of the large substrate is 300 mm × 350 mm and the size of the small substrate is 290 mm × 345 mm. In addition, an element having no unevenness and having no remaining bubbles could be obtained.

(Embodiment 8) The position of the weir portions 2 and 2 in the embodiment 1 is set at a position 7 mm away from the end of the injection-side small substrate 4 and perpendicular to the long axis from the small substrate end 4b as shown in FIG. It was provided to extend to the end 3a. The injection method was also different from that in Example 1 in that the empty cell 10 was placed in the composition reservoir 7 such that the liquid level of the composition 6 was below the weirs 2 and 2. At this time, empty cell 10
The temperature of the composition 6 in the composition reservoir 7 was kept at 25 ° C. As a result, as in Example 1, a uniform element without unevenness and without bubbles was obtained. Also, as compared with the first embodiment,
The injection was completed slightly faster.

(Embodiment 9) As in Embodiment 8, the position of the weirs 2 and 2 in Embodiment 2 is perpendicular to the long axis at a position 7 mm away from the injection-side small substrate end 4a as shown in FIG. Small board edge 4a to large board edge 3a
And extended. Similarly, the injection method was different from that in Example 2 in that the empty cell 10 was placed in the composition reservoir 7 so that the liquid level of the composition was lower than the weirs 2 and 2. At this time, the empty cell 10 and the composition 6 in the composition reservoir 7
Was kept at 25 ° C. As a result of this example, as in Example 2, a uniform element without unevenness and without air bubbles was obtained. The injection was completed slightly faster than in Example 2.

(Embodiment 10) As in Embodiment 8, the position of the weir portions 2 and 2 in Embodiment 3 is perpendicular to the long axis at a position 7 mm away from the injection-side small substrate end 4b as shown in FIG. It was provided from the edge of the small substrate to the edge of the large substrate. The injection method is different from that of Example 3 in the same manner as in Example 8 or 9, and the empty cell 10 is set in the composition reservoir 7 so that the liquid level of the composition is lower than the weirs 2 and 2. Made by. At this time, the temperature of the composition in the empty cell 10 and the composition reservoir 7 was kept at 25 ° C. As a result of this example, a uniform element without unevenness and without bubbles was obtained as in Example 3. In addition, the injection was completed slightly faster than in Example 3.

(Embodiment 11) As in Embodiment 8, the position of the weir portions 2 and 2 in Embodiment 4 is perpendicular to the long axis at a position 7 mm away from the injection-side small substrate end 4b as shown in FIG. Small board edge 4a to large board edge 3
a. The injection method is different from that of Example 4 in the same manner as in Example 8 or 9 or 10, and the empty cell 10 is set in the composition reservoir 7 so that the liquid level of the composition is lower than the weirs 2 and 2. I went by doing. At this time, the temperature of the empty cell 10 and the composition 6 in the composition reservoir 7 was kept at 25 ° C. As a result of the present example, a uniform element without unevenness and without bubbles was obtained as in Example 4. Example 4
The injection was completed slightly faster than at the time.

(Embodiment 12) As in Embodiment 8, the position of the weirs 2 and 2 in Embodiment 5 is perpendicular to the long axis at a position 7 mm away from the injection-side small substrate end 4b as shown in FIG. Small board edge 4a to large board edge 3
a. The injection method is also the same as in Example 8 or 9 or 10 or 11, and unlike Example 5, the empty cell 10 is placed in the composition reservoir such that the liquid level of the composition is below the weirs 2 and 2. It was done by installing. At this time, the temperature of the empty cell 10 and the composition 6 in the composition reservoir 7 is 2
It was kept at 5 ° C. As a result of this example, a uniform element without unevenness and without bubbles was obtained as in Example 5. Also, the injection was completed slightly faster than in Example 5. Even without providing the dam portion 2, it was confirmed that a similar uniform element could be obtained by the injection method as shown in Example 12 having the seal pattern as shown in FIG. did it.

(Embodiment 13) The positions of the dams 2 and 2 in the embodiment 6 are changed to the injection-side small substrate end 4.
13 at a position 10 mm away from b.
And extended from the small substrate end 4a to the large substrate end 3a. The injection method was also different from that in Example 6 in that the empty cell 10 was placed in the composition reservoir 6 such that the liquid level of the composition was below the weirs 2 and 2. At this time, the temperature of the empty cell 10 and the composition 6 in the composition reservoir 7 was kept at 25 ° C. As a result of this example, a uniform element without unevenness and without bubbles was obtained as in Example 6. Example 6
The injection was completed slightly faster than at the time.

Example 14 The positions of the dams 2 and 2 in Example 1 were provided diagonally from the small substrate end 4a to the large substrate end 3a as shown in FIG. As for the injection method, one corner without a weir is immersed in the composition reservoir 7,
The liquid level of the composition was determined by placing the empty cell 10 so that the small substrate angle was 3 mm below the liquid level at the injection side angle.
At this time, the temperature of the empty cell 10 and the composition 6 in the composition reservoir 7 was kept at 25 ° C. As a result, similar to the first embodiment,
A uniform element without unevenness and without bubbles was obtained.

(Embodiment 15) The positions of the weir portions 2 and 2 in Embodiment 2 are provided diagonally from the corners of the small substrate ends to the large substrate ends 3a and 3a as shown in FIG. As for the injection method, one corner without the weirs 2 and 2 is immersed in the composition reservoir 7, and the liquid surface of the composition has a small substrate angle at the injection side corner.
This was performed by setting the empty cell 10 so as to be below the liquid level of 3 mm. At this time, the temperature of the empty cell 10 and the composition 6 in the composition reservoir 7 was kept at 25 ° C. As a result of this example,
In the same manner as in Example 2, a uniform element without unevenness and without bubbles was obtained.

(Example 16) The two positions of the weir portions 2 in Example 3 were provided diagonally from the small substrate end 4a to the large substrate end 3a as shown in FIG. The pouring method is also such that one corner without the weirs 2 and 2 is immersed in the composition reservoir 7, and the liquid surface of the composition is at the pouring side angle and the small substrate angle is 3 mm.
This was performed by placing an empty cell 10 below the liquid level. At this time, the temperature of the empty cell and the composition 6 in the composition reservoir 7 was kept at 25 ° C. As a result of this example, Example 3
In the same manner as in the above, a uniform element having no unevenness and no air bubbles was obtained.

Example 17 The positions of the dams 2 and 2 in Example 1 were changed as shown in FIG. Weir portions 2 and 2 were provided extending from the small substrate end 4a to the large substrate end 3a in the vertical direction at a position 2 mm below the long axis seal end on the side opposite to the injection side. As in Example 1, the empty cells were formed specifically by facing substrates having different sizes and sizes one by one as shown in FIG. In the injection method, the liquid level of the composition is initially 2 mm above the lower end of the small substrate (injection side (A)) 4b, and the height of the composition in the cell is 4 mm from the lower end of the small substrate (injection side) 4b. When it came, the distance between the liquid surface of the composition reservoir 7 and the height of the proceeding composition was maintained at an interval of 2 mm,
The depth of the empty cell immersed in the composition reservoir 7 was controlled by the infrared sensor 8. At this time, the electrode terminals of the empty cells were protected by masking tape (N-380) (manufactured by Nitto Denko Corporation). The temperature of the panel 10 and the composition in the composition reservoir 7 were kept at 25 ° C. As a result, as in Example 1, there was no unevenness.
A uniform element free of air bubbles was obtained. The injection also entered the injection direction uniformly at a constant rate. Almost no unevenness was detected even when measured with a luminance meter. In addition, the protection of the electrode terminal portion is not limited to the above, and a mask 503-SH (manufactured by Asahi Chemical Laboratory Co., Ltd.) can be used even by using a masking tape Scotch 202 (manufactured by Sumitomo 3M Limited). ) Was used, and the same result was obtained.

(Embodiment 18) As for Embodiments 2 to 5, the same results were obtained as a result of a study conducted in the same manner as in Embodiment 17. A uniform element without unevenness and without bubbles was obtained. In particular, in the present study for the fifth embodiment, the substrate size is not limited to the above as described in the first embodiment. The size on the large substrate side is 300 mm × 350 mm, and the size on the small substrate side is 290 mm × Injection was completed in the same manner using a 345 mm device, and an element without unevenness and without bubbles was obtained.

(Example 19) Injection was applied to Example 6, as in Example 17, as shown in FIG. As a result, a uniform element having no unevenness and having no remaining bubbles was obtained. Also in this case, the size on the large substrate side is 300m.
In the same manner, even when a device having a size of mx 350 mm and a size of the small substrate side of 290 mm 345 mm was used, the injection was completed, and an element having no unevenness and having no remaining bubbles could be obtained.

Example 20 A thermoplastic polymer having a shape memory effect is used on the surface of a substrate. This time, as a thermoplastic polymer,
The polyurethane proposed in JP-A-116102 is used. An example of the structural formula of the urethane polymer is shown in the following formula (Formula 1).

Embedded image Polyurethane is partially crystallized, and when it exceeds the glass transition point (Tg), becomes a rubber elastic state due to micro Brownian motion of molecular chains. If external force is applied in this state,
The molecular chains are easily oriented in the direction of the external force, and the shape changes.
When cooled to a temperature of Tg or less in this state, the micro-brown motion of the molecular chains is frozen and becomes a plastic state, the deformation is fixed, and the shape is memorized. After that, the re-heating of Tg or more starts micro-Brownian motion of the molecular chain, the orientation of the molecular chain is released, and the original shape is restored. A polyurethane film having the above function is formed as a coating film and rubbed. An external force is applied by rubbing, and the molecular chain is uniaxially stretched in the rubbing direction. Next, by reheating the substrate to a temperature equal to or higher than the Tg of the polyurethane,
The orientation of the molecular chains of the polyurethane is released, and the polyurethane is in a non-stretched state. Thereby, the alignment of the liquid crystal molecules can be easily controlled. The following large and small substrates shown in Examples 1 to 19 were used. A polyurethane solution having a solid content of 6% by weight (for example, MS5500 (Tg point: 55 ° C.): manufactured by Mitsubishi Heavy Industries, Ltd.) is transferred to the electrode surfaces of both large and small substrates by letterpress printing and baked at 80 ° C. for 1 hour. Polyurethane layer (alignment film)
Was formed. The thickness of the polyurethane layer was about 80 nm.
Next, the surface of the polyurethane layer was rubbed with a rayon cloth in the direction in which the composition was injected (one direction). The substrate thus obtained was used. The production of the polymer-dispersed liquid crystal was also performed in the following manner, different from Examples 1 to 19. Further, the injection time was very fast, and the injection time was reduced by 1/3 compared to Examples 1 to 19, respectively. After the injection, the periphery of the panel is sealed with a polymer resin. This time, we masked the device so that it would not be exposed to ultraviolet light,
UV resin was applied around the panel to seal the composition. (For example, Loctite 352A (Nippon Loctite Co., Ltd.)
V (350 nm) 55 mW / cm ² , cured by irradiation for 90 seconds. Then, the panel was heated at 60 ° C. for 1 hour with the mask applied. The uniaxial stretching effect given to the polyurethane alignment film by rubbing once is completely lost by heating above Tg,
It changed so that it might be in a non-stretched state. Further, by heating at 60 ° C. for 1 hour, the unevenness in the panel which remained in part was completely eliminated. Subsequently, it was cooled at a rate of 15 ° C./sec to 25 ° C. After the panel temperature reached 25 ° C., the mask was removed, and ultraviolet irradiation was performed to obtain a polymer-dispersed liquid crystal. As a result, a uniform element having no unevenness and having no remaining bubbles was obtained. In addition, the injection speed was high, and a device having better voltage holding characteristics than the devices shown in Examples 1 to 19 could be obtained.

(Example 21) The polyurethane solution of Example 20 having a Tg point near the use environment temperature of the device was used (for example, MS3500).
(Tg point: 35 ° C.): manufactured by Mitsubishi Heavy Industries, Ltd.). Example 2
The heating was performed in the same manner as in Example 0, and the heating at 60 ° C. for losing the rubbing effect in Example 20 was performed at 40 ° C. The other conditions were the same and a polymer dispersed liquid crystal device was obtained. As a result,
A uniform element without unevenness and without bubbles was obtained. In addition, the injection speed was high, the voltage holding characteristics were good, and the driving voltage was low.

Example 22 The compositions in Examples 1 to 21 were changed as follows.
3.0 wt% of 2-ethylhexyl acrylate (manufactured by Nacalai Tesque, Inc.) and 9.0 wt. Of 2-hydroxyethyl acrylate (manufactured by Nacalai Tesque, Inc.) as monomers
%, Neopentyl glycol diacrylate KAY
ARAD MANDA (manufactured by Nippon Kayaku Co., Ltd.) 2.48 wt%, KAYARAD R-551 (manufactured by Nippon Kayaku Co., Ltd.) 5.36 w which is an EO-modified bisphenol A diacrylate as an oligomer
tg, Irgacure 651 which is benzyl dimethyl ketal as a photo-curing initiator (manufactured by Nippon Ciba Geigy Co., Ltd.)
0.16 wt% of a photopolymerizable material and a chlorine-based liquid crystal TL205 [NI point = 87 ° C., ne = 1.744, no =
1.527] (Merck Japan K.K.) to obtain a composition. As a result, as in Examples 1 to 21, a uniform element without unevenness and without bubbles was obtained.

Example 23 The composition in Example 22 was changed as follows. 17.55 wt% of 2-ethylhexyl acrylate (manufactured by Nacalai Tesque, Inc.) as a prepolymer material, and an acrylic ester 4HBA which is 4-hydroxybutyl acrylate
0.44 wt% (manufactured by Mitsubishi Rayon Co., Ltd.), 0.20 wt% of acrylate ester SA (manufactured by Mitsubishi Rayon Co., Ltd.) which is 2-succinoloyloxyethyl methacrylate
AD TPGDA (manufactured by Nippon Kayaku Co., Ltd.) from 1.11 wt%, and 0.20 wt% of Darocure-1173 (manufactured by Merck) which is 2-hydroxy-2-methyl-1-phenylpropan-1-one as a photocuring initiator. TL205 [NI point = 87 ° C., ne = 1.744, no = 1.52]
7] (Merck Japan K.K.) 80.5 wt% was mixed to obtain a composition. As a result, as in Example 22, a uniform device without unevenness and with no remaining bubbles was obtained.

The materials such as the compositions in Examples 1 to 23 shown above are not limited to those described above, and many other materials can be used. Examples 1 to 23
It was confirmed that the ultraviolet light intensity was not limited to the indicated intensity, and that the characteristic of the present invention could be obtained at 3 to 160 mW / cm ² . Further, the cell thickness of the device is not limited to 13.0 μm. Further, in the above embodiments, the case of the polymer-dispersed liquid crystal is shown. However, the present invention is not limited to the polymer-dispersed liquid crystal, and can be applied to other liquid crystal display elements and the production thereof, so that there is no unevenness. A uniform liquid crystal display element can be obtained.

[0084]

According to the liquid crystal display device and the method of manufacturing the same of the present invention, even at normal pressure, a material such as a composition can be easily injected into a panel without air bubbles and uneven injection, and uniform panel supply can be achieved. It is possible. In addition, since pressure fluctuation such as pressure reduction operation as in the past is not used, injection can be performed without affecting the composition. In particular, when injecting at least a mixture of a liquid crystal material and a polymer resin material as a composition, such as a polymer-dispersed liquid crystal, it is difficult to produce the composition by pressure fluctuation due to problems such as volatilization of the monomer. Although unevenness was likely to occur, this problem can be solved by the manufacturing method of the present invention. Further, by using the thermoplastic polymer having a shape memory effect of the present invention, the injection of the material such as the composition can be performed speedily and without any problem. More shape
By forming a thermoplastic polymer layer having a memory effect on the substrate surface, the retention can be improved. According to the manufacturing method, even at normal pressure, a material such as a composition can be easily injected into a panel without bubbles and uneven injection, and a uniform panel can be supplied. In addition, since pressure fluctuation such as pressure reduction operation as in the past is not used, injection can be performed without affecting the composition. In particular, when injecting at least a mixture of a liquid crystal material and a polymer resin material as a composition, such as a polymer-dispersed liquid crystal, it is difficult to produce the composition by pressure fluctuation due to problems such as volatilization of the monomer. Although unevenness was likely to occur, this problem can be solved by the manufacturing method of the present invention. Further, by using the thermoplastic polymer having a shape memory effect of the present invention, the injection of the material such as the composition can be performed speedily and without any problem. More shape
By forming a thermoplastic polymer layer having a memory effect on the substrate surface, the retention can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an empty cell before injecting a composition according to a first embodiment of the display element of the present invention.

FIG. 2 is a schematic plan view showing an empty cell before injecting a composition according to a second embodiment of the display element of the present invention.

FIG. 3 is a schematic plan view showing an empty cell before injecting a composition according to a third embodiment of the display element of the present invention.

FIG. 4 is a schematic plan view showing an empty cell before injecting a composition according to a fourth embodiment of the display element of the present invention.

FIG. 5 is a schematic plan view showing an empty cell before injecting a composition according to a fifth embodiment of the display element of the present invention.

FIG. 6 is a schematic plan view showing an empty cell before injecting a composition according to a sixth embodiment of the display element of the present invention.

FIG. 7 is a schematic plan view showing an empty cell before injecting a composition according to a seventh embodiment of the display element of the present invention.

FIG. 8 is a schematic view of device production at the time of injecting a composition for explaining a first embodiment of the method for producing a display device of the present invention.

FIG. 9 is a schematic view of device production at the time of injecting a composition for explaining a second embodiment of the method for producing a display device of the present invention.

FIG. 10 is a schematic view of device production at the time of injecting a composition for explaining a third embodiment of the method for producing a display device of the present invention.

FIG. 11 is a schematic view of device production at the time of injecting a composition for explaining a fourth embodiment of the method for producing a display device of the present invention.

FIG. 12 is a schematic diagram of device production at the time of injecting a composition for explaining a fifth embodiment of the method for producing a display device of the present invention.

FIG. 13 is a schematic diagram of device production at the time of injecting a composition for explaining a sixth embodiment of the method for producing a display device of the present invention.

FIG. 14 is a schematic diagram of device production at the time of injecting a composition for explaining a seventh embodiment of the method for producing a display device of the present invention.

FIG. 15 is a schematic view of device production at the time of injecting a composition for explaining an eighth embodiment of the method for producing a display device of the present invention.

FIG. 16 is a schematic diagram of device production at the time of injecting a composition for explaining a ninth embodiment of the method for producing a display device of the present invention.

FIG. 17 is a schematic view of element production at the time of injecting a composition for explaining a tenth example of the method for producing a display element of the present invention.

FIG. 18 is a schematic view of device production at the time of injecting a composition for explaining an eleventh embodiment of the method for producing a display device of the present invention.

[Explanation of symbols]

 1a, 1b, 1c, 1d, 1e, 1f Seal part 2 Weir part (stopper) 3 Large substrate 4 Small substrate 5 Composition supply part 6 Composition 7 Composition reservoir 8 Sensor 10 Empty cell

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-67124 (JP, A) JP-A-4-371926 (JP, A) JP-A-5-5893 (JP, A) JP-A-5-593 11260 (JP, A) JP-A-5-45662 (JP, A) JP-A-5-232484 (JP, A) JP-A-5-11234 (JP, A) (58) Fields investigated (Int. ⁷ , DB name) G02F 1/1339 505 G02F 1/1341

Claims (22)

(57) [Claims] 1. A pair of electrode-attached substrates, at least one of which is transparent, is bonded at a sealing portion with a resin material of a sealing material with the electrode side of the substrates facing each other, and a high cell is formed in empty cells formed between the substrates. A liquid crystal display element in which a molecule-dispersed liquid crystal is present, wherein a display surface of the liquid crystal display element is rectangular, and two or more liquid crystal elements have no seal material in a seal portion formed along an edge of each side of the substrate. And the pair of electrodes-containing substrates is composed of a large substrate having a large area and a small substrate having a small area. On the large substrate, the height of the small substrate is measured from the edge of the small substrate to the edge of the large substrate. And two lower weirs are provided, and between the two weirs or below the two weirs are inlets for a composition containing a polymer-forming material and a liquid crystal. Liquid crystal display element. 2. The liquid crystal display device according to claim 1 , wherein the openings are formed at four corners of the substrate. 3. The liquid crystal display device according to claim 1 , wherein an opening is formed in at least one portion where no sealing material is present at two or more sides of the sealing portion perpendicular to the injection direction. Wherein said seal portion is formed by tree fat in dotted, the liquid crystal display device according to claim 1 or 2 opening is formed. 5. A method according to claim 1-4 before Kisora cells that have weir portions so as not written Ri times on the opposite side is provided from the composition across the injection side edge provided with said injection port The liquid crystal display device according to any one of the above. 6. A dam injection unit and the vertical direction of the liquid crystal display device in claim 5 is provided from the injection side is located above the serial <br/> mounting against two sides. 7. Inlet to the opening of one corner of the empty cells are formed, with respect to two of the corners adjacent to that one corner, claim weir portion consisting tree fat material is provided 1 Any of ~ 4
The liquid crystal display element of crab described. 8. at least one of a pair of transparent glass transition temperature (Tg point) on at least one electrode side substrate of the substrate with electrode or the ambient temperature following the form of the softening point element
The liquid crystal display device according to any one of claims 1 to 4, wherein a thermoplastic polymer having a shape memory effect is coated. 9. The substrate has a shape memory effect in which a glass transition temperature (Tg point) or a softening point is lower than or equal to a use environment temperature of an element on at least one electrode-side substrate of the electrode-attached substrate.
That the thermoplastic polymer is a coating film formed, the heat glass transition temperature (Tg point) of the thermoplastic polymer or the element is heated a predetermined time, uniaxial stretching of the thermoplastic polymer is released,
The liquid crystal display device according to any one of claims 1 to 4, which is in a non-stretched state. 10. at least one thermoplastic polymer layer having a shape memory effect in the at least one electrode side substrate surface of the substrate with a pair of transparent electrodes are formed, the thermoplastic polymer layer is uniaxially stretched, on the surface Is rubbed in the direction in which the composition is injected, the composition is injected between the substrates, the injection port is sealed with a sealing resin, and then the thermoplastic polymer has a glass transition temperature (T
(g point) A liquid crystal display element which is heated for a certain period of time or longer, and is unstretched by uniaxial stretching. 11. The liquid crystal display device according to claim 10, wherein a glass transition temperature (Tg point) of the thermoplastic polymer having the shape memory effect is higher than an ambient temperature of use of the device. 12. The thermoplastic resin according to claim 8, wherein the thermoplastic polymer having a shape memory effect is polyurethane .
The liquid crystal display device according to. 13. The liquid crystal display device according to claim 10, wherein the composition injected into the empty cell comprises a mixture of a liquid crystal material and a polymer material. 14. A pair of electrode-attached substrates, at least one of which is transparent, facing each other with the electrodes facing each other, forming a gap between the substrates with a resin material of a sealing material, and bonding them together. Providing an outlet opening to form an empty cell,
A method of manufacturing a liquid crystal display device by injecting a composition containing a polymer-forming material and liquid crystal into an empty cell formed between the substrates, wherein the pair of electrode-attached substrates has a relatively large area. Using a large substrate and a relatively small substrate, providing two dams on the large substrate from the edge of the small substrate to the edge of the large substrate at a height higher than the height of the small substrate ; Using the inlet between the two weirs or the lower surface of the two weirs as an inlet, and injecting a composition containing a polymer-forming material and a liquid crystal from the inlet into the space between the substrates at normal pressure. A method for manufacturing a liquid crystal display element , comprising: 15. A pair of electrode-attached substrates, at least one of which is transparent, facing each other with electrodes facing each other, providing a gap between the substrates with a sealing resin material, and providing at least an inlet and an outlet. A liquid crystal display element by injecting a composition containing a polymer-forming material and a liquid crystal into the empty cells formed between the substrates, wherein the sealing portion comprises a substrate. Either four corners are provided with openings, or two sides perpendicular to the injection direction are provided with openings at least at one or more locations where there is no seal material, or a seal is formed of resin in a dotted line. The pair of substrates with electrodes use a large substrate having a relatively large area and a small substrate having a relatively small area. On the large substrate, the height of the small substrate extends from the edge of the small substrate to the edge of the large substrate. high weir than of Are provided at two locations, and between the two weirs or the lower surface from the two weirs are used as an inlet, and a composition containing a polymer-forming material and a liquid crystal is supplied from the inlet to the substrate. A method for producing a liquid crystal display element , characterized by injecting into a gap at normal pressure. 16. The method according to claim 16, wherein the weir is provided above the injection side with respect to two sides in a direction perpendicular to the injection part, and the empty cell is immersed in a liquid composition containing a liquid crystal material to be injected into the empty cell. Item 16. The method for manufacturing a liquid crystal display device according to item 14 or 15 . 17. An infrared sensor , a thermal sensor or an optical sensor for detecting the liquid level of the composition, wherein the level of the liquid level of the composition is always positioned at a level at which the composition is poured into the empty cell. to control the immersion position of the empty cell, injecting the composition is provided in the seal end of the side and vertical provided the dam portion of the discharge port near the outlet side claims 14 and 15
17. A method for manufacturing a liquid crystal display device according to item 16 . 18. The composition according to claim 14 , wherein after protecting the terminal portions of the electrodes of the substrate and the outer surface of the substrate, the composition is injected.
6. The method for manufacturing a liquid crystal display element according to 5 . 19. and the opening of one corner of the empty panel inlet, to two of the corners adjacent to that one corner is provided with a weir portion made of a polymeric resin material, said injection side weir It was placed below the section, a method of manufacturing a liquid crystal display device according to claim 15, 16 or 17 to inject immersed in liquid composition containing a liquid crystal material. 20. A thermoplastic polymer layer having a shape memory effect is formed on at least one electrode-side substrate surface of at least one of a pair of electrode-attached substrates, and the thermoplastic polymer layer is formed in a direction in which a composition is injected. rubbing the polymer layer, the polymer layer is subjected to a uniaxial stretching, to form a device by injecting a composition from the inlet between the substrates, after injection has been completed, such that the composition from the device does not leak And sealing with a sealing resin, and the glass transition temperature (Tg) of the thermoplastic polymer.
Point) A method for producing a liquid crystal display element, comprising heating the element for a certain period of time to release uniaxial stretching of the thermoplastic polymer to a non-stretched state and then lowering the temperature. 21. The method of manufacturing a liquid crystal display device according to claim 14, wherein, at the time of injecting the liquid crystal composition, the composition and the substrate to be injected are heated to a certain temperature and then injected. 22. A method for manufacturing a liquid crystal display device of <br/> according to the injection intends line under normal pressure to claim 20.