JPH07270763A - Liquid crystal display element - Google Patents

Abstract

PURPOSE:To prevent the surface of a liquid crystal-dispersed polymer and the back surface of a base body from sticking to each other due to blocking phenomenon in the production process of a liquid crystal display element, even when a liquid crystal-dispersed polymer layer formed on a base body is, for instance, taken up or stacked so that the surface of the liquid crystal-dispersed polymer layer and the back surface of the base body are brought into contact with each other. CONSTITUTION:In the liquid crystal display element composed of a base body 2 having a conductive layer and a liquid crystal-dispersed polymer layer 9, 29 having at least a liquid crystal dispersed in a polymer matrix formed on the base body, the back surface 3 of the base body 2 opposite to the conductive layer 6 is made to have a rugged surface or, the surface of the liquid crystal- dispersed polymer layer is made to be a rugged surface. Or, a blocking preventing layer is formed on the back surface of the base body opposite to the conductive layer.

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.
More specifically, a liquid crystal display device including a liquid crystal dispersed polymer layer, which selectively transmits and scatters light by utilizing an electro-optical effect of changing the light scattering state of liquid crystal depending on the presence or absence of an electric field, and a method for manufacturing the same. Regarding

[0002]

2. Description of the Related Art Conventionally, many liquid crystal display elements utilizing the electro-optical effect of liquid crystal have been proposed. Among them, a liquid crystal display device using a liquid crystal dispersion polymer layer in which liquid crystals are finely dispersed in a polymer matrix does not require an alignment film or a polarizing plate,
Since it is possible to obtain a bright display screen with a wide viewing angle, and it is relatively easy to increase the area, many display elements have been proposed so far.

As a method of providing a liquid crystal dispersed polymer layer on a conductive layer of a substrate, a so-called polymer-liquid crystal common solvent evaporation phase separation method (common solvent casting method), a polymer precursor from a liquid crystal-polymer precursor mixture is used. Many proposals have been made such as a polymerization phase separation method in which a body is polymerized by light or heat, a melt cooling phase separation method in which a liquid crystal and a polymer are cooled from a heated and molten state, a method in which a liquid crystal is microencapsulated and dispersed in a polymer. Among them, the polymer-liquid crystal common solvent evaporation phase separation method (common solvent casting method) applies a common solvent solution of liquid crystal and polymer onto a substrate, and then evaporates only the solvent to phase separate the liquid crystal and polymer. Since a liquid crystal dispersed polymer layer can be formed by doing so, a liquid crystal dispersed polymer layer can be formed on the substrate by using an ordinary coating machine such as a gravure coater, a rod coater or a blade coater by using a flexible substrate. It is possible to continuously coat and is a method with excellent productivity.

[0004]

In order to efficiently manufacture a liquid crystal display element, a continuous substrate provided with a conductive layer is formed by
Apply a common solvent solution of liquid crystal and polymer continuously with a coating machine.
Drying is performed to form a liquid crystal dispersed polymer layer. In a normal coating machine, what is generally coated is once wound into a roll. Therefore, a phenomenon called blocking may occur in which the surface of the liquid crystal dispersed polymer layer and the back surface of the base material stick to each other.

This will be described with reference to FIG. 8. The back surface 3 of the base material 2 of the upper layer 10 and the surface of the liquid crystal dispersed polymer layers 9 and 29 of the lower layer 11 of the liquid crystal display elements 101 and 201 in a wound state. It is considered that the liquid crystal-dispersed polymer layers 9 and 29 act like an adhesive because they are in close contact with each other, and as a result, the liquid crystal-dispersed polymer layers 9 and 29 and the substrate 2 cause a blocking phenomenon.

This blocking phenomenon is caused by forming a liquid crystal dispersion polymer layer using a common solvent solution of liquid crystal, a polymer and a curing agent, and winding it in order to obtain a liquid crystal dispersion polymer layer having a crosslinked structure excellent in stability over time. It becomes more likely to occur when the fish is heated in a constant temperature bath. This is because when the base material coated with the liquid crystal dispersion polymer layer is wound up, the curing agent in the middle of the reaction acts as an adhesive between the liquid crystal dispersion polymer layer and the base material, and is heated by heat to accelerate the crosslinking reaction. It is considered that this is because the liquid crystal dispersed polymer layer and the substrate are firmly adhered to each other.

Due to such a blocking phenomenon, the surface condition of the liquid crystal dispersion polymer layer is deteriorated, or the liquid crystal dispersion polymer layer is peeled off from the substrate. In a manufacturing method including a step of forming a liquid crystal dispersed polymer layer on a continuous substrate by a coating machine by an evaporation phase separation method and winding the same, a decrease in yield has been a problem.

As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that when the back surface of the substrate and / or the surface of the liquid crystal dispersed polymer layer is uneven, or on the back surface of the substrate. The present invention has been found to prevent the blocking phenomenon between the surface of the liquid crystal dispersed polymer layer and the back surface of the substrate by providing the prevention layer for preventing the blocking phenomenon.

An object of the present invention is to provide a liquid crystal dispersed polymer layer on a substrate during the production of a liquid crystal display device,
For example, a liquid crystal display having a structure that does not cause a blocking phenomenon even if the surface of the liquid crystal dispersed polymer layer comes into contact with the back surface of another substrate by winding them or stacking them. It is to provide the element.

[0010]

In order to achieve the above object, the present invention comprises at least a liquid crystal-dispersed polymer layer in which a liquid crystal is finely dispersed in a polymer matrix, on a substrate provided with a conductive layer. In the liquid crystal display element, the back surface of the base material opposite to the conductive layer and / or the surface of the liquid crystal dispersion polymer layer is uneven.

Further, the liquid crystal display device is a substrate in which the back surface is a film having a matte surface.

Alternatively, in a liquid crystal display device comprising fine particles mixed in the base material and / or the liquid crystal dispersed polymer layer to form an uneven surface on the back surface of the base material and / or the surface of the liquid crystal dispersed polymer layer. is there.

The present invention also provides a liquid crystal display device comprising a liquid crystal-dispersed polymer layer in which a liquid crystal is finely dispersed in a polymer matrix on a base material on which a conductive layer is laminated. The liquid crystal display element is characterized in that a blocking prevention layer is provided on the back surface on the opposite side.

Further, the anti-blocking layer is a liquid crystal display device in which fine particles are dispersed in a resin binder to make the surface uneven.

The conductive layer in the present invention may be either transparent or opaque and may have a surface resistance of 10 ⁷ Ω / □ or less. For example, using a plastic film as the base material, the surface of which is aluminum, titanium, chromium,
It can be obtained by conducting with tin, rhodium, gold, stainless steel, titanium nitride, nickel-chromium, aluminum-chromium or indium tin oxide.

As the substrate, a flexible plastic film is usually used. For example, polyethylene terephthalate, polyethylene naphthalate, polypropylene, polyethylene, polyvinyl chloride, polysulfone,
Examples thereof include films of polymers such as polyphenylene oxide, ionomer, polycarbonate, nylon and fluororesin.

The liquid crystal dispersed polymer layer is a layer in which liquid crystals are finely dispersed in a polymer matrix. As a method for finely dispersing liquid crystals, a polymer-liquid crystal common solvent evaporation phase separation method (common solvent casting method) is used. Preferably used,
The polymer-liquid crystal common solvent solution is directly or indirectly coated and dried on the conductive layer of the base material, and the polymer and liquid crystal undergo phase separation by evaporation of the solvent, and the liquid crystal is finely dispersed in the polymer matrix. It

As the liquid crystal used in the liquid crystal dispersed polymer layer, liquid crystals such as nematic liquid crystal, smectic liquid crystal and cholesteric liquid crystal can be used. Further, a dichroic dye or other additive may be added and used depending on the application.

As the polymer used in the liquid crystal dispersed polymer layer, any kind of resin can be used as long as it is soluble in a solvent. Examples thereof include polyvinyl acetal resin, vinyl resin such as acrylic resin, polyester resin, polysulfone resin, polyphenylene oxide resin, ionomer resin, polycarbonate resin, and polyolefin resin. Also, depending on the application
You may add additives, such as a hardening | curing agent and an ultraviolet absorber.

The matte-treated film on the back surface is a film obtained by physically or chemically processing the back surface of the film into fine irregularities during or after the production of the film, and is commercially available. .

As the fine particles mixed in the base material and / or the liquid crystal dispersed polymer layer, those having a relatively small particle size and a small particle size variation are preferably used. As the shape of the fine particles, a spherical one is generally used, but fine particles having other shapes such as a columnar shape and a flaky shape can also be used. The material of the fine particles may be inorganic or organic. For example, it is a fine particle obtained by granulating a resin such as a silicone resin or an acrylic resin.

The antiblocking layer in the present invention means
It is provided in order to prevent the blocking phenomenon from occurring when the surface of the liquid crystal dispersed polymer layer and the back surface of the substrate come into contact with each other. For example, there is a resin film layer having releasability. Examples of the resin having releasability include polyethylene resin, polypropylene resin, polyester resin, vinyl chloride resin, vinylidene chloride resin, fluororesin, silicone resin, wax paraffin and the like. Such a prevention layer can be formed by applying the resin to the back surface of the base material.

Alternatively, it may be a layer in which fine particles are dispersed in a resin binder to make the surface uneven. The resin binder may be transparent or opaque, and any kind of resin can be used, but a solvent-soluble substance is preferable for the convenience of forming the antiblocking layer. The fine particles are the same as the above-mentioned fine particles, and those having good dispersibility in the binder resin are preferably used. For the base material, dissolve the resin and fine particles in a solvent.
By dispersing and coating and drying the solution on the substrate, an antiblocking layer having a surface with unevenness can be formed on the back surface of the substrate. In addition, depending on the case, a cross-linking type antiblocking layer having solvent resistance and high adhesion to a substrate can be formed by mixing a curing agent in addition to the resin and the fine particles.

In the liquid crystal display device of the present invention, the liquid crystal dispersed polymer layer may be directly laminated on the conductive layer of the base material, or the prior application of the applicant of the present invention, Japanese Patent Laid-Open Publication No. No. 224182, a transparent high electric resistance layer may be laminated on a conductive layer, and a liquid crystal dispersed polymer layer may be laminated thereon.

In the liquid crystal display element of the present invention, when the liquid crystal dispersed polymer layer is formed on the substrate during the production of the liquid crystal display element, the surface of the liquid crystal dispersed polymer layer and the back surface of another substrate are in contact with each other. Even if the structure is such that the blocking phenomenon does not occur, and in the subsequent step, another layer such as a liquid crystal dispersion layer is formed on the liquid crystal dispersion polymer layer for the reason of using the liquid crystal display element of the present invention. It may be a laminate of protective film layers for protecting the polymer layer from dirt and scratches.

The liquid crystal display device of the present invention is used as a liquid crystal light control panel by laminating a substrate having a conductive layer on a liquid crystal dispersed polymer layer so that the conductive layer is in contact with the liquid crystal dispersed polymer layer. You can also

[0027]

In the liquid crystal display element of the present invention, since the back surface of the base material having the conductive layer on the side opposite to the conductive layer and / or the surface of the liquid crystal dispersed polymer layer is uneven, during the production of the liquid crystal display element, When the liquid crystal dispersed polymer layer is formed on the substrate, even if the surface of the liquid crystal dispersed polymer layer and the back surface of another substrate come into contact with each other, the surface of the liquid crystal dispersed polymer layer and the back surface of the substrate come into close contact with each other. Therefore, the blocking phenomenon does not occur.

Further, by providing the anti-blocking layer on the back surface of the base material, even when the surface of the liquid crystal dispersed polymer layer and the back surface of the base material may come into contact with each other during the production of the liquid crystal display device. The blocking phenomenon does not occur, or the surface of the liquid crystal dispersed polymer layer and the back surface of another substrate are easily separated from each other, so that the surface state of the liquid crystal dispersed polymer layer does not deteriorate.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. In the embodiments, the same members and the same parts are designated by the same reference numerals. In addition, in the examples, "parts" simply means "parts by weight".

Example 1 A liquid crystal display element 1 according to a first example of the present invention will be described with reference to FIGS. 1 and 2. As the base material 2, continuous #
50 Matt Metal Me TS (manufactured by Toyo Metalizing Co., Ltd.) was used. This # 50 Matt Metal Me TS is
The back surface 3 was a matte treatment, and was a polyester film 5 having an aluminum vapor deposition layer formed on the front surface 4. This vapor deposition aluminum layer was used as a conductive layer 6 in the present liquid crystal display element 1. A solution having the following composition was applied and dried on the conductive layer 6 using a test coater (manufactured by Musashino Kikai Seisakusho Co., Ltd., a gravure coating machine) so that the dry film thickness was 7 μm. As shown, a liquid crystal-dispersed polymer layer 9 in which the liquid crystal 7 was finely dispersed in a polymer matrix 8 was formed and wound on a 6-inch paper tube. S-REC KS-1 (Sekisui Chemical Co., Ltd., polyvinyl acetal resin) 21 parts E44 (MERCK, nematic liquid crystal) 9 parts Ethyl acetate 190 parts

The back surface 3 of the base material 2 of the upper layer 10 of the liquid crystal display element 1 in the wound state as shown in FIG.
When the surface 12 of the liquid crystal dispersed polymer layer 9 was peeled off, no blocking phenomenon occurred between the two, and the surface 1 of the liquid crystal dispersed polymer layer 9 of the lower layer 11
The liquid crystal-dispersed polymer layer 9 was peeled off without impairing the state 2 and the surface state was good.

Embodiment 2 Referring to FIGS. 1 and 2, a liquid crystal display element 2 of the second embodiment is shown.
1 will be described. As the base material 2, as in Example 1, # 50
Using Matt Metal Me TS (manufactured by Toyo Metallizing Co., Ltd.) and using the same test coater as in Example 1 on the conductive layer 6 of the vapor-deposited aluminum layer, a solution having the following composition has a dry film thickness of 7 μm. After coating and drying as described above, a liquid crystal dispersed polymer layer 29 in which the liquid crystal 7 was finely dispersed in the polymer matrix 8 as shown in FIG. 1 was formed and wound on a 6-inch paper tube. S-REC KS-1 (Sekisui Chemical Co., Ltd., polyvinyl acetal resin) 21 parts Takenate D110N (Takeda Pharmaceutical Co., Ltd., polyisocyanate) 28 parts E44 (MERCK, nematic liquid crystal) 18 parts Ethyl acetate 370 parts

4 in the state of being wound
The liquid crystal dispersion polymer layer 2 was left to stand in a constant temperature bath at 0 ° C for 3 days.
The polymer matrix 8 of 9 was crosslinked.

After the cross-linking is completed, the back surface 3 of the base material 2 of the upper layer 10 of the liquid crystal display element 21 and the surface 12 of the liquid crystal dispersed polymer layer 29 of the lower layer 11 as shown in FIG.
As a result of peeling off the part where the and are in contact with each other, no blocking phenomenon occurred between them, and the liquid crystal dispersion polymer layer 29 of the lower layer 11 was peeled off without impairing the liquid crystal dispersion having a good surface condition. The polymer layer 29 could be obtained.

Example 3 With reference to FIGS. 3 and 4, a liquid crystal display element 3 of Example 3 was prepared.
1 will be described. As the base material 2, continuous # 50 Metalmy TS (manufactured by Toyo Metalizing Co., Ltd.) was used. The # 50 METAL MEE TS is a polyester film 35 having an aluminum vapor deposition layer formed on the surface 4, and this vapor deposition aluminum layer was used as the conductive layer 6 in the present liquid crystal display element 31. On the back surface 3 of the base material 2 opposite to the conductive layer 6, a solution having the following composition was applied and dried using the same test coater as in Example 1 so that the dry film thickness was 6 μm.
Fine particles 14 were dispersed in a resin binder 13 to form an anti-blocking layer 16 having a surface 15 formed in an uneven shape, and the blocking prevention layer 16 was wound on a 6-inch paper tube. S-REC KS-1 (manufactured by Sekisui Chemical Co., Ltd., polyvinyl acetal resin) 18 parts Takenate D110N (manufactured by Takeda Pharmaceutical Co., Ltd., polyisocyanate) 8 parts MBX-5 (manufactured by Sekisui Chemical Co., Ltd., fine spherical particles) 1 part 160 parts of ethyl acetate

8 in the wound state
The anti-blocking layer 1 was left for 1 day in a constant temperature bath at 0 ° C.
Curing of No. 6 was performed.

Next, a solution having the following composition was applied and dried on the conductive layer 6 of the base material 2 using the same test coater as in Example 1 so that the dry film thickness was 7 μm. As shown in FIG. 3, the liquid crystal dispersed polymer layer 2 obtained by finely dispersing the liquid crystal 7 in the polymer matrix 8 as in Example 2.
9 was formed and wound on a 6 inch paper tube. S-REC KS-1 (Sekisui Chemical Co., Ltd., polyvinyl acetal resin) 21 parts Takenate D110N (Takeda Pharmaceutical Co., Ltd., polyisocyanate) 28 parts E44 (MERCK, nematic liquid crystal) 18 parts Ethyl acetate 370 parts

The wound state is 4 as it is.
The liquid crystal dispersion polymer layer 2 was left to stand in a constant temperature bath at 0 ° C for 3 days.
The polymer matrix 8 of 9 was crosslinked.

After the completion of crosslinking, the blocking prevention layer 1 of the liquid crystal display element 31 in a wound state as shown in FIG.
When the surface 15 of 6 and the surface 12 of the liquid crystal dispersed polymer layer 29 of the lower layer 11 were peeled off, the blocking phenomenon did not occur between them, and the liquid crystal dispersed polymer layer 29 of the lower layer 11 of The liquid crystal-dispersed polymer layer 29 having a crosslinked structure in which the surface 12 was peeled off without impairing the state of the surface 12 could be obtained.

Example 4 Although the liquid crystal display element of this example is not shown,
As the base material, the same continuous # 50 Metalmy TS (manufactured by Toyo Metalizing Co., Ltd.) as in Example 3 was used. On the back surface of the vapor-deposited aluminum layer opposite to the conductive layer, a dry film thickness made of the following composition was 3 μm in the same manner as in Example 3.
An anti-blocking layer, which is a resin layer having releasability, was formed and wound on a 6-inch paper tube. 1254A (manufactured by Kubo Ken Paint Co., Ltd., two-component curing type silicone resin base) 35 parts 1254B (Kubo Think Paint Co., Ltd., two-component curing type silicone resin curing agent) 5 parts Methyl ethyl ketone 80 parts Ethyl acetate 32 parts Cyclohexanone 8 parts

Next, in the same manner as in Example 3, on the conductive layer of the substrate, a liquid crystal dispersed polymer layer obtained by finely dispersing liquid crystal droplets in a polymer matrix having the dry film thickness of 7 μm and having the following composition. And then roll it up on a 6-inch paper tube,
The polymer matrix of the liquid crystal dispersed polymer layer was crosslinked by leaving it as it was in a constant temperature bath at 40 ° C. for 3 days. S-REC KS-1 (Sekisui Chemical Co., Ltd., polyvinyl acetal resin) 21 parts Takenate D110N (Takeda Pharmaceutical Co., Ltd., polyisocyanate) 28 parts E44 (MERCK, nematic liquid crystal) 18 parts Ethyl acetate 370 parts

After the cross-linking was completed, as in Example 1, the surface of the anti-blocking layer as the upper layer of the liquid crystal display element in the wound state and the surface of the lower liquid crystal-dispersed polymer layer were peeled off. As a result, the blocking phenomenon did not occur between them, and it was peeled off without impairing the surface state of the lower layer liquid crystal dispersed polymer layer, and it was possible to obtain a liquid crystal dispersed polymer layer having a crosslinked structure with a good surface state. .

Example 5 Referring to FIGS. 5 and 6, a liquid crystal display element 5 of Example 5 was obtained.
1 will be described. As the base material 2, the same continuous # 50 Metalmy TS as in Example 3 was used. On the conductive layer 6 of this vapor-deposited aluminum layer, using the same test coater as in Example 1, a solution having the following composition was applied and dried to a dry film thickness of 7 μm, and as shown in FIG. , The liquid crystal 7 is finely dispersed in the polymer matrix 8, and the fine particles 1
4 was dispersed to form a liquid crystal dispersed polymer layer 59 having the surface 12 in an uneven shape, which was wound on a 6-inch paper tube. S-REC KS-1 (Sekisui Chemical Co., Ltd., polyvinyl acetal resin) 21 parts Takenate D110N (Takeda Pharmaceutical Co., Ltd., polyisocyanate) 28 parts E44 (MERCK, nematic liquid crystal) 18 parts MBX-5 (Sekisui Chemical Co., Ltd.) Kogyo Co., Ltd., fine spherical particles) 3 parts Ethyl acetate 190 parts

4 in the state of being wound
The liquid crystal dispersion polymer layer 5 was left to stand in a constant temperature bath at 0 ° C. for 3 days.
The polymer matrix 8 of 9 was crosslinked.

After the cross-linking is completed, the back surface 3 of the base material 2 of the upper layer 10 of the liquid crystal display element 51 and the surface 12 of the liquid crystal dispersed polymer layer 59 of the lower layer 11 as shown in FIG.
When I peeled off the place where and are in contact with each other, the blocking phenomenon did not occur between them, and peeled off without impairing the state of the surface 12 of the liquid crystal dispersed polymer layer 59 of the lower layer 11,
A liquid crystal dispersed polymer layer 59 having a crosslinked structure with a good surface condition could be obtained.

Comparative Example 1 With reference to FIGS. 7 and 8, a liquid crystal display element 101 of this comparative example.
Will be described. As the base material 2, the same continuous # 50 Metalmy TS as in Example 3 was used. Using the same test coater as in Example 1, a solution having the following composition was dried on the conductive layer 6 of the vapor-deposited aluminum layer to give a dry film thickness of 7 μm.
7 was applied and dried to form a liquid crystal dispersed polymer layer 29 in which the liquid crystal 7 was finely dispersed in the polymer matrix 8 as shown in FIG. . S-REC KS-1 (Sekisui Chemical Co., Ltd., polyvinyl acetal resin) 21 parts E44 (MERCK: nematic liquid crystal) 9 parts Ethyl acetate 190 parts

As shown in FIG. 8, the rear surface 3 of the base material 2 of the upper layer 10 of the liquid crystal display element 101 in the wound state and the surface 12 of the liquid crystal dispersed polymer layer 9 of the lower layer 11 are in contact with each other. As a result of peeling, a blocking phenomenon occurred between the both, and a liquid crystal display element 101 having a liquid crystal dispersed polymer layer 9 having a good surface condition in all parts could not be obtained.

Comparative Example 2 With reference to FIGS. 7 and 8, a liquid crystal display element 201 of this comparative example.
The same continuous # 50 Metal Mee TS as in Example 3 was used as the base material 2. Using the same test coater as in Example 1, a solution having the following composition was dried on the conductive layer 6 of the vapor-deposited aluminum layer to give a dry film thickness of 7 μm.
m, and then dried to form a liquid crystal dispersed polymer layer 29 in which the liquid crystal 7 is finely dispersed in the polymer matrix 8 as shown in FIG. 7, and wound on a 6-inch paper tube. It was S-REC KS-1 (Sekisui Chemical Co., Ltd., polyvinyl acetal resin) 21 parts Takenate D110N (Takeda Pharmaceutical Co., Ltd., polyisocyanate) 28 parts E44 (MERCK: nematic liquid crystal) 18 parts Ethyl acetate 370 parts

4 in the state of being wound
The liquid crystal dispersion polymer layer 2 was left to stand in a constant temperature bath at 0 ° C for 3 days.
The polymer matrix 8 of 9 was crosslinked.

As shown in FIG. 8, the back surface 3 of the base material 2 of the upper layer 10 of the liquid crystal display element 201 in the wound state and the surface 12 of the liquid crystal dispersed polymer layer 29 of the lower layer 11 are in contact with each other. When peeled off, a blocking phenomenon occurred between them, and it was not possible to obtain a liquid crystal display element 210 having a crosslinked structure with a good surface state in all parts.

[0051]

Since the liquid crystal display device of the present invention has the above-mentioned structure, after the liquid crystal dispersion polymer layer is formed on the substrate during the production of the liquid crystal display device, the liquid crystal dispersion polymer layer surface and other Even if the back surface of the base material comes into contact, the surface state of the liquid crystal dispersion polymer layer does not deteriorate because the front surface of the liquid crystal dispersion polymer layer and the back surface of the base material do not cause a blocking phenomenon. It is possible to improve the yield in manufacturing the device.

[Brief description of drawings]

FIG. 1 shows the first and second embodiments of the present invention, and is a schematic view showing a cross section of a liquid crystal display element in which a base material is an aluminum vapor-deposited polyester film having a matte-treated back surface.

FIG. 2 is a schematic view showing a cross section of the liquid crystal display element in a rolled-up state in the liquid crystal display element of FIG.

FIG. 3 shows a third embodiment of the present invention, and is a schematic view showing a cross section of a liquid crystal display element in which a blocking prevention layer in which fine particles are mixed is provided on the back surface of a base material.

FIG. 4 is a schematic view showing a cross section of the liquid crystal display element in a rolled-up state in the liquid crystal display element of FIG.

FIG. 5 shows a fifth embodiment of the present invention and is a schematic view showing a cross section of a liquid crystal display device in which fine particles for preventing blocking are mixed in a liquid crystal dispersed polymer layer.

6 is a schematic view showing a cross section of the liquid crystal display element in a rolled-up state in the liquid crystal display element of FIG.

FIG. 7 is a schematic view showing a cross section of a conventional liquid crystal display element.

8 is a schematic view showing a cross section of the liquid crystal display element in a rolled-up state in the liquid crystal display element of FIG.

[Explanation of symbols]

 1, 21, 31, 51 Liquid crystal display element 2 Substrate 3 Back surface 6 Conductive layer 7 Liquid crystal 8 Polymer matrix 9, 29, 59 Liquid crystal dispersed polymer layer 10 Upper layer 11 Lower layer 12 Surface 14 Fine particles 15 Surface 16 Blocking prevention layer

Claims (5)

[Claims] 1. A liquid crystal display device comprising a liquid crystal-dispersed polymer layer in which a liquid crystal is finely dispersed in a polymer matrix on a base material provided with a conductive layer, the side opposite to the conductive layer of the base material. 2. The liquid crystal display element, wherein the back surface and / or the surface of the liquid crystal dispersed polymer layer in 1) is uneven. 2. The liquid crystal display device according to claim 1, wherein the base material is a film having a back surface matt-treated. 3. The back surface of the base material and / or the back surface of the base material and / or the liquid crystal dispersed polymer layer are mixed with fine particles.
Alternatively, the liquid crystal display element according to claim 1, wherein the surface of the liquid crystal dispersed polymer layer is formed in an uneven shape. 4. A liquid crystal display device comprising at least a liquid crystal dispersed polymer layer in which a liquid crystal is finely dispersed in a polymer matrix on a base material provided with a conductive layer, the side opposite to the conductive layer of the base material. 2. A liquid crystal display device, characterized in that an anti-blocking layer is provided on the back surface of. 5. The liquid crystal display element according to claim 4, wherein the anti-blocking layer is a layer in which fine particles are dispersed in a resin binder to make the surface uneven.