JPH06242422A - Polymer dispersion type liquid crystal display device and its manufacture - Google Patents

Abstract

PURPOSE:To prevent liquid crystal from oozing out of gaps between polymer dispersion type liquid crystal layer pattern formed by an electrodeposition coating method by providing a polymer dispersion type liquid crystal layer, which holds liquid crystal in a polymer matrix in a grain state, divisionally as plural areas, and forming electric insulating thin films between the areas. CONSTITUTION:The polymer dispersion type liquid crystal display device has a display layer 1 sandwiched between substrates 11 and 12 formed of glass, films, etc., having transparent conductive films 13 operating as electrodes, and the display layer 1 consists of the polymer dispersion type liquid crystal layer which hold the liquid crystal 14 in the grain states in the polymer matrix 15 containing pigments of the primary colors, i.e., red R, green G, and blue B and electric insulating thin films 16 at the gaps between the areas of the polymer dispersion type liquid crystal layer. The liquid crystal 14 is preferably capsular. The electric insulating thin films 16 are formed by, for example, lithography or screen printing by using ink containing electric insulating resin. Consequently, the gaps between liquid crystal layers are excellently sealed to obtain the display device where no liquid crystal oozes out.

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 using a polymer dispersed liquid crystal layer and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a liquid crystal display has been widely used as a display medium for characters and images, such as a wristwatch, a calculator, a personal computer and a television, because of its low power consumption, light weight and thin shape. In a general TN type or STN type liquid crystal display, a liquid crystal cell provided with a predetermined seal is placed between glass plates having transparent electrodes, liquid crystal is sealed in the liquid crystal cell, and a polarizing plate is further applied from both sides. It consists of sandwiched in. This general TN type and STN type liquid crystal display requires (1) a viewing angle is narrow because two polarizing plates are required, and a backlight with high power consumption is required because the brightness is insufficient. (2) Because of the large cell thickness dependence,
There are drawbacks such as difficulty in increasing the area, (3) it is difficult to fill the liquid crystal in the liquid crystal cell due to the complicated structure, and the manufacturing cost becomes high.

In order to solve these problems, a polymer dispersion type liquid crystal layer comprising a liquid crystal / polymer composite film in which liquid crystal is dispersed in a polymer matrix has been developed, and a method for producing such a polymer dispersion type liquid crystal layer. An emulsion method and a phase separation method are used as the method. Liquid crystal by emulsion method
A method for producing a polymer-dispersed liquid crystal layer composed of a polymer composite film is a method using an aqueous solution in which a liquid crystal is emulsified with polyvinyl alcohol as a protective colloid (Tokusho Sho-58-
No. 501631) and a method of using an aqueous solution in which a liquid crystal emulsion is mixed with a latex (JP-A-60-25).
2687) and a liquid crystal by a phase separation method.
As a method for producing a polymer-dispersed liquid crystal layer composed of a polymer composite film, there are a method of fixing the phase separation state of the liquid crystal and the matrix resin, and a method of phase separation of the liquid crystal from the matrix resin during film formation.

As a method for fixing the phase separation state of the liquid crystal and the matrix resin, a method in which the liquid crystal is dispersed in an epoxy resin and then cured (Japanese Patent Publication No. 61-502128) or a liquid crystal in a UV curable resin is used. U after dispersing
Method of curing V-curable resin (Tokusho Sho 62-2231)
Issue gazette). Further, as a method of phase-separating the liquid crystal from the matrix resin at the time of film formation, a method of phase-separating the liquid crystal during curing of the matrix resin, a method of phase-separating the liquid crystal during solvent evaporation, and a cooling process of the thermoplastic resin There is a method of phase separation (Japanese Patent Publication No. 63-501512). As a technique for improving the phase separation during curing of the matrix resin, U of a mixed system of liquid crystal and UV curable resin is used.
A method of phase-separating a liquid crystal during curing of a V-curing resin (Japanese Patent Laid-Open No. 63-271233, Japanese Patent Laid-Open No. 1-252689), or a thermosetting epoxy resin of a mixed system of a liquid crystal and a thermosetting epoxy resin. Method of phase separation of liquid crystal during curing of the resin (JP-A-63-287820, JP-A-1-299)
No. 022) and the like.

Further, as a technique for improving the phase separation of liquid crystals during solvent evaporation, a technique using an acrylic resin having an active hydroxyl group as a matrix (Japanese Patent Laid-Open No. 1-2306).
No. 93), one using cellulose acetate as a matrix (Japanese Patent Laid-Open No. 63-124025), one using a resin incompatible with liquid crystal as a matrix (Japanese Patent Laid-Open No. 63-43993), and the like. . The one using the polymer dispersed liquid crystal layer as described above is
It becomes a bright liquid crystal display with high light utilization efficiency, and since it can be manufactured by using the coating method, it may be possible to reduce the price, but the coating suitability of the polymer dispersion type liquid crystal solution itself is not good. However, there is a drawback that a polymer dispersed liquid crystal layer with excellent performance cannot be obtained depending on the coating method.

When an emulsion of liquid crystal and an aqueous solution of a water-soluble polymer substance is used, the liquid crystal content is 80 to
The electro-optical characteristics such as a decrease in driving voltage are improved by reducing the amount of the polymer to 90% by weight as much as possible, and at the same time, in order to sufficiently emulsify
I use three times the amount of water. For this reason, thixotropic property becomes high, and it becomes difficult to remove air bubbles mixed in at the time of forming the coating film. In the display, the presence of air bubbles is a fatal problem, and it is particularly difficult to remove the air bubbles mixed in the coating process. Therefore, the voltage characteristics required for the liquid crystal display device cannot be made uniform over the entire surface. Further, in the production of a liquid crystal / polymer composite film by the phase separation method, it is necessary to reduce the polymer matrix as much as possible, and the fluidity of the coating liquid is inevitably high. Occurs.

Thus, when forming the polymer dispersed liquid crystal layer, various coating methods cannot be effectively utilized. For example, in the blade coating method, there is a problem that coating unevenness occurs at the edge of the coating film, coating start, coating end, etc. Further, there is a problem that pattern coating is impossible and an expensive coating solution is used extra. is there. Further, in the screen printing method, there are problems such as generation of bubbles at the time of passing through the mesh, and back coating of the coating solution on the back surface of the plate. Due to such problems, it has been proposed to form a polymer dispersed liquid crystal layer by an electrodeposition coating method. In this electrodeposition coating method, the polymer-dispersed liquid crystal layer has high film thickness uniformity, is excellent in mass productivity, can form sharp edges, and can finely process fine patterns in a large area. It has characteristics such as being able to perform. As a method of separately coating the multicolored polymer dispersion type liquid crystal layers by the electrodeposition coating method, the electrodes are previously formed in a pattern and placed, and a voltage is selectively applied to the electrodes to perform the electrodeposition coating. You are using the method to do it.

[0008]

[Problems to be solved by the invention] However,
In the method for forming a polymer dispersion type liquid crystal layer in a pattern using this electrodeposition coating method, a gap is formed between the patterns of the polymer dispersion type liquid crystal layer, so that the liquid crystal seeps from such a portion. There is a problem of deterioration of the element due to exposure. still,
In order to prevent deterioration of the element due to this liquid seepage,
It is possible to apply a sealant to the gap between the patterns by a screen printing method or the like to form the seal layer, but it is difficult to align the sealant when applying the sealant. There are problems that it is difficult to match the thickness of the dispersion type liquid crystal layer, the polymer dispersion type liquid crystal layer may be damaged when the sealant is applied, and especially due to a fine pattern such as several hundreds of microns. It has drawbacks such as difficulty in forming a seal layer. Therefore, the object of the present invention is to solve the above-mentioned drawbacks of the prior art.
It is an object of the present invention to provide a polymer-dispersed liquid crystal display device in which liquid crystal does not seep through a gap between polymer-dispersed liquid crystal layer patterns formed by an electrodeposition coating method, and a method for manufacturing the same.

[0009]

The above object can be achieved by the present invention having the following constitution. That is, according to the present invention, a polymer dispersed liquid crystal layer in which liquid crystals are held in a polymer matrix in a particulate form is provided between a pair of conductive substrates in a plurality of divided regions. A polymer dispersed liquid crystal display device and a method for manufacturing the same, wherein an electrically insulating thin film is formed between a plurality of regions of a liquid crystal layer.

[0010]

According to the above-mentioned structure of the present invention, the polymer dispersion type liquid crystal having excellent and high reliability is provided by the sealing action of the electrically insulating thin film which fills the gap between the polymer dispersion type liquid crystal layer patterns divided into a plurality of regions. A display device is obtained. In particular, when the electrically insulating thin film has a light-shielding property, a display effect with high color reproducibility of the element and excellent contrast is exhibited.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the following preferred embodiments. An example of the structure of the polymer dispersed liquid crystal display device of the present invention is shown in FIG. The polymer-dispersed liquid crystal display device of the present invention includes a transparent conductive film 1 that functions as an electrode.
The display layer 1 is sandwiched between two substrates such as a glass or a film having a number 3, and the display layer 1 is R (red),
Between the polymer dispersed liquid crystal layer 14 in which the liquid crystal 14 is held in the form of particles in the polymer matrix containing dyes of the three primary colors of G (green) and B (blue), and the regions of the polymer dispersed liquid crystal layer. It is composed of an electrically insulating thin film 16 in the gap. Liquid crystal 1
4 is preferably in the form of capsules, and it is preferable that the liquid crystal particles contain a dichroic dye that absorbs light not absorbed by the dye contained in the matrix.

Since the dichroic dye in the liquid crystal changes its molecular direction as the liquid crystal molecules are aligned by the electric field, the light absorption characteristics of each pixel change depending on whether or not a voltage is applied. When the absorption of the dichroic dye is sufficiently low, the pixel shows the color due to the dye in the matrix, and when the absorption of the dichroic dye is sufficiently high, the pixel is separated from the dichroic dye and the dye in the matrix. Depending on the color mixture, for example, black is shown. In the above display device, there are two modes depending on the combination of the liquid crystal used and the dichroic dye. FIG. 2 is a conceptual diagram of a pixel having a G hue.
a, 2b. In the case of the normal mode of FIG. 2a, due to the combination of the liquid crystal having a positive dielectric anisotropy and the p-type dye, the hue of the matrix layer is shown when a voltage is applied, and the hue is black when no voltage is applied. On the other hand, in the case of the reverse mode of FIG. 2b, due to the combination of the liquid crystal having a negative dielectric anisotropy and the n-type dye, black is shown when a voltage is applied and the hue of the matrix layer is shown when no voltage is applied.

In the reverse mode cell, the liquid crystal molecules in the off state need to be aligned perpendicularly to the cell surface as shown in FIG. 2b. The method for such alignment is as follows. The method is known. The polymer dispersed liquid crystal layer is deformed by applying stress to the polymer dispersed liquid crystal layer by heat pressing or the like. The polymer matrix is cured by applying a low frequency voltage using a dual frequency driving liquid crystal, and is driven by a high frequency voltage. The dye contained in the matrix may be a dye or a pigment,
A part of the liquid crystal phase may be contained in the liquid crystal phase, but this causes an increase in driving voltage, and therefore it is preferable that the liquid crystal phase be present in the matrix as much as possible.

Coloring of the matrix layer by the dichroic dye in the liquid crystal lowers the contrast of the displayed image and should be avoided as much as possible. Therefore, it is desirable that the liquid crystal particles be encapsulated. Different dichroic dyes in the liquid crystal can be used for each polymer dispersed liquid crystal layer in each region for the purpose of improving chromaticity characteristics and improving light utilization efficiency. The polymer-dispersed liquid crystal layer forming each of the above regions is arranged in a regular pattern such as a stripe shape or a mosaic shape, and electrodes corresponding to each of these areas are provided, and a voltage is applied to each pixel. It can be turned on and off. A diffuse reflector 2 is provided behind the polymer-dispersed liquid crystal layer, and a white light source 3 is usually provided behind it in order to obtain sufficient brightness.

Next, a method of manufacturing the polymer dispersed liquid crystal display device of the present invention will be described. The electrically insulating thin film in the polymer-dispersed liquid crystal display device of the present invention is formed by using an ink containing an electrically insulating resin, for example, by lithography, screen printing, or the like. It is preferable that the thickness of the electrically insulating thin film is substantially equal to the thickness of the polymer dispersed liquid crystal layer. Further, when the counter electrode is attached, in order to prevent air from entering between the counter electrode and the polymer-dispersed liquid crystal layer, the polymer-dispersed liquid crystal layer, the electrically insulating thin film, and the counter electrode are separated from each other. Good lamination is required. Therefore,
It is preferable to form an intermediate layer on the polymer dispersed liquid crystal layer / electrically insulating thin film to enhance the smoothness of the laminate interface, or to place a fluid intermediate layer on the counter electrode. still,
A curable material may be used as the intermediate layer, and the intermediate layer may be cured by a predetermined means after being laminated with the counter electrode.

As an example of the method of forming the polymer dispersed liquid crystal layer in the region where the pattern of the electrically insulating thin film is not formed, there is a method of forming the polymer dispersed liquid crystal layer by electrodeposition coating. The electrodeposition coating here means that a main electrode serving as a coating substrate and a counter electrode are arranged in a coating liquid and electricity is applied to electrically solidify the solid content (matrix resin + liquid crystal particles) in the coating liquid onto the substrate. Adsorption or deposition is carried out, and then the coated substrate is taken out and the aqueous solvent is removed to obtain a coating film in which liquid crystal particles are dispersed in the polymer matrix. Electrodeposition coating methods include anion electrodeposition that is deposited on the anode and cation electrodeposition that is deposited on the cathode, but electrodeposition is performed on a thin film layer of a metal oxide that is usually used as a transparent electrode. In that case, anion electrodeposition is preferably performed in order to avoid coloring due to reduction of the electrode. Suitable examples of the anionic resin include maleated oil resin, anion-modified polybutadiene resin, alkyd resin and acrylic resin. The coating liquid for obtaining the polymer-dispersed liquid crystal layer by the electrodeposition coating method may be prepared as an emulsion in which the liquid crystal is emulsified and dispersed in the aqueous solution of the anionic resin.

From the viewpoint of the coating film structure of the obtained polymer-dispersed liquid crystal layer, and from the viewpoint of optimizing the voltage distribution to the liquid crystal matrix, microcapsulated liquid crystal is used, and this is used as an aqueous solution of anionic resin. It is preferable to use a coating liquid which is emulsified and dispersed therein. Further, in order to improve the solubility of the matrix resin and obtain a smooth coating film, it is advisable to add an organic solvent to the electrodeposition coating solution. As the organic solvent here, methanol, ethanol, alcohols such as isopropanol, methylcellosolve, cellosolves such as ethylcellosolve, glycol, hydrophilic organic solvents such as carbitol are preferably used, but in some cases xylol, Hydrophobic solvents such as toluene can also be used. Furthermore, examples of the auxiliary agent that can be used include a surfactant for imparting dispersion stability, a leveling agent for improving the smoothness of the coating film, and an antifoaming agent.

The liquid crystal microencapsulation method can use a general microencapsulation technique applied to other materials. The general microencapsulation method includes a chemical preparation method, a physicochemical preparation method, and a physical / mechanical preparation method. As the chemical preparation method, there are an interfacial polymerization method using a synthetic reaction, an in situ polymerization method, and an in-liquid curing coating method which causes a change in physical properties of a polymer. The interfacial polymerization method is a method in which a water-soluble monomer and an oil-soluble monomer are selected as two kinds of monomers that undergo a polycondensation or polyaddition reaction, and either of them is dispersed and reacted at the interface. in s
The in situ polymerization method is a method in which a reactant (monomer, initiator) is supplied from one of the inside and the outside of the core material to cause the reaction on the surface of the capsule wall film. The in-liquid hardening coating method (orifice method) is a method of encapsulating a core material with a wall film agent in advance and then hardening the wall film in a hardening liquid.

As a physicochemical preparation method, a coacervation method utilizing phase separation, an interfacial precipitation method (liquid concentration method,
In-liquid drying method, secondary emulsion method) and melt dispersion method are available. Furthermore, the coacervation method can be used in an aqueous solution system or an organic solvent system. Further, a simple coacervation method in which phase separation is caused by a decrease in solubility, and a complex coacervation method in which phase separation is caused by an electric interaction can be used. The organic solvent system utilizes the phase separation phenomenon due to changes in solubility and temperature. The interfacial precipitation method is a method capable of encapsulation under mild conditions without violent reaction or abrupt pH change. For example, after the emma arsion in which a liquid crystal core material is dispersed is dispersed in a solvent solution of a hydrophobic polymer. Further, it is dispersed in a protective colloid solution. The melt dispersion method uses a wax-like substance such as wax or polyethylene as a wall film material, and is a method in which a core material is dispersed in a liquid together with the wax-like substance under heating and then cooled.

Spray as a physical and mechanical method
Drying method, air suspension coating method, vacuum deposition coating method, etc. can be mentioned, but since the liquid crystal that is the core material is a liquid at room temperature, it is necessary to create an emulsion that adjusts its size, so making a liquid crystal capsule Not legal. Another method for producing a polymer dispersed liquid crystal layer in the present invention is a step of filling a region containing no pattern of an electrically insulating thin film with a liquid containing an ionizing radiation-curable monomer or oligomer and a liquid crystal, and ionizing the film. The polymer-dispersed liquid crystal layer is formed by curing the ionizing radiation-curable monomer or oligomer by irradiation with radiation. The coating liquid used in this method needs to have fluidity, and when the liquid crystal is a non-encapsulated liquid crystal, the liquid crystal and the ionizing radiation-curable monomer or oligomer are separated before irradiation with ionizing radiation. It may be in a uniform compatible state, or may be one in which liquid crystals are finely dispersed. Liquid crystal microcapsules can also be used in this method, and the liquid crystal microcapsules may be the same as those used in the electrodeposition coating method described above.

The coating liquid filled in the region where the pattern of the electrically insulating thin film is not formed is cured by irradiation with ionizing radiation to become a polymer dispersed liquid crystal layer. The irradiation of ionizing radiation may be performed before or after overlapping with the counter electrode. Another manufacturing method of the present invention is a conductive film divided into a plurality of regions on an electrically insulating substrate such as glass or plastic film, for example, an electrode made of an inorganic oxide or the like used for a transparent electrode. And a step of providing an electrically insulating film that tunes with the negative pattern of the conductive film, a voltage is selectively applied to each electrode, and a high voltage is applied to the electrode to which the voltage is applied by an electrodeposition coating method. Forming a molecular dispersion type liquid crystal layer and repeating the above-mentioned operation to apply a multicolored polymer dispersion type liquid crystal layer separately on each electrode. Type liquid crystal display device can be manufactured.

[0022]

EXAMPLES Next, the present invention will be described more specifically with reference to examples. Example 1 [Production of Liquid Crystal Capsule] An oil phase and an aqueous phase shown below were stirred using a homogenizer at 5,000 rpm for 10 minutes to produce an emulsion. Oil phase nematic liquid crystal (BL-010 manufactured by Merck & Co., Inc.) 200 parts Dichroic dye 4 parts Methyl methacrylate 20 parts Azobisisobutyronitrile 0.4 parts Water phase polyvinyl alcohol (KP-06, manufactured by Nippon Synthetic Chemical Industry) 20 Parts water 980 parts The above emulsion was heated at 70 ° C. for 6 hours to be encapsulated.

[Formation of ITO pattern and resist pattern] A stripe pattern having a line width of 150 μm and a gap of 30 μm is formed by a vapor deposition method on a substrate made of an optically polished glass plate having a size of 100 mm × 100 mm and a thickness of 1.1 mm. Thus, an ITO electrode was provided. It should be noted that the stripe pattern has a length of 5 m as a set of 3 pieces.
It is designed so that the selective voltage application can be easily performed. On the ITO electrode side of the obtained substrate, a black APR photosensitive resin prepared to have a reflection density of 1.2 to 1.5 was applied to a thickness of 9 μm by a blade coating method, and then the ITO electrode pattern was formed. The mask was accurately aligned and exposed so that a pattern having a line width of 30 μ forming a reverse pattern was obtained, and developed and dried to form a pattern made of an electrically insulating thin film.

[Electrodeposition] A coating solution having the following composition was prepared. Liquid crystal capsule dispersion 100 parts Acrylic electrodeposition resin 6 parts Water-soluble melamine resin 2 parts Triethylamine 1.4 parts Ethanol 12 parts Water 24 parts Organic pigment 2 parts

Using the above coating solution as an electrodeposition bath, an electrode to be colored in the same color is selected from among ITO electrodes on a glass plate patterned in stripes, and the selected electrode is used as an anode and a voltage of 20V is applied. Was applied for 30 seconds. After energizing, pull up the electrode substrate from the electrodeposition bath and wash with water, then at 80 ℃
The coated polymer-dispersed liquid crystal layer having a film thickness of 10 μm was formed on the electrode to which voltage was applied by drying and curing for 1 hour. By using the same electrodeposition coating liquid in which pigments of different hues were dispersed and repeating the above electrodeposition-curing step, polymer dispersed liquid crystal layers of RGB three colors were formed in stripes.

[Production of panel and confirmation of operation] 100 m
m × 100 mm, 1.1 mm thick heat-resistant glass, P-
A driving glass panel in which a TFT element made of a Si film and an ITO film necessary for driving were formed was produced. Subsequently, a UV-curable epoxy acrylate resin was applied on the TFT element side of this driving glass panel by spin coating to a film thickness of 0.5 μm, and the glass having the polymer dispersion type liquid crystal layer on the applied surface. The polymer-dispersed liquid crystal layer surface of the substrate was overlapped, and UV irradiation was further performed to cure the epoxy acrylate resin. A backlight was provided on this to fabricate a panel. When this panel was driven at an effective voltage of 20 V, good results were obtained in brightness, contrast and color reproducibility. Moreover, there was virtually no viewing angle dependency, and a clear display could be seen from any angle.

Comparative Example 1 In the panel manufacturing process of Example 1, the same process as the corresponding process of Example 1 was performed except that the step of forming the resist pattern on the substrate was omitted. Got a panel of. When the panel of Comparative Example 1 was compared with the panel of Example 1, both the contrast and the color purity were poor. Further, when the panel of Example 1 and the panel of Comparative Example 1 were stored at 60 ° C. for 1 hour, no leaching of liquid crystal was observed in the panel of Example 1, but the panel of Comparative Example 1 did not show liquid crystal. Exudation occurred and display spots occurred. Example 2 The capsules produced in Example 1 were dried using a spray dryer to prepare the following composition. Capsule 89 parts Bifunctional methacrylate monomer (epoxy ester 40EM, Kyoeisha Yushi Kagaku Kogyo Co., Ltd.) 7.92 parts 2-Hydroxy-2-methyl-1-phenylpropan-1-one 0.08 parts Organic pigment 3 parts The above composition In 3 above, the three color dispersion liquids using the organic pigments of R, G and B were pattern-coated on the glass substrate with a resist pattern prepared in Example 1 using a metal screen plate so as to be accurately synchronized. . After aligning and laminating the TFT substrate used in Example 1, UV
The monomer was polymerized and cured by irradiation with 600 mJ / cm ² . A panel was prepared by providing a backlight in the same manner as in Example 1. It was confirmed that this panel, when driven at an effective voltage of 20 V, can perform good display in terms of brightness, contrast and color reproducibility. In addition, there was virtually no viewing angle dependency, and a clear display could be seen from all angles. Comparative Example 2 A panel made of a polymer dispersed liquid crystal film of three colors RGB was prepared under the same conditions as in Example 2 except that the stripe pattern ITO substrate used in Example 2 was not provided with a resist pattern. Compared with the panel prepared in Example 2, this panel had poor contrast and color purity, and when this panel was stored at 60 ° C. for 1 hour, uneven display occurred due to seepage of liquid crystal.

[0028]

According to the present invention, the gap between the polymer-dispersed liquid crystal layers partitioned into a plurality of regions is well sealed, and the polymer-dispersed liquid crystal layer is highly reliable with no liquid crystal seepage. A liquid crystal display device can be provided. Further, by making the electrically insulating thin film have a light shielding property, it is possible to provide a color display panel excellent in color reproducibility and contrast.

[0029]

[Brief description of drawings]

FIG. 1 is a diagram illustrating a polymer dispersed liquid crystal display device of the present invention.

FIG. 2 is a diagram illustrating a polymer dispersed liquid crystal display device of the present invention.

Claims (7)

[Claims] 1. A polymer-dispersed liquid crystal layer in which a liquid crystal is held in a polymer matrix in a particulate form is provided between a pair of conductive substrates in a divided manner. A polymer dispersed liquid crystal display device, characterized in that an electrically insulating thin film is formed between a plurality of regions of the layer. 2. The polymer matrix of the polymer-dispersed liquid crystal layer divided into pixels in a plurality of regions contains a dye, and adjacent pixels contain dyes of different hues.
The polymer-dispersed liquid crystal display device described. 3. The electrically insulating thin film has a light-shielding property.
Alternatively, the polymer-dispersed liquid crystal display device according to claim 2. 4. The polymer dispersed liquid crystal display device according to claim 1, wherein a dichroic dye is added to the liquid crystal. 5. A method comprising: providing a pattern of an electrically insulating thin film on a conductive substrate; and forming a polymer dispersed liquid crystal layer in a region where the thin film does not exist by an electrodeposition coating method. And a method for manufacturing a polymer dispersed liquid crystal display device. 6. A step of providing a pattern of an electrically insulating thin film on a conductive substrate, a step of filling a region containing no thin film with a liquid containing an ionizing radiation-curable monomer or oligomer and a liquid crystal, and ionizing And a step of forming a polymer-dispersed liquid crystal layer by curing the ionizing radiation-curable monomer or oligomer by irradiating with radiation, thereby producing a polymer-dispersed liquid crystal display device. 7. A step of providing an electrode made of a conductive film divided into a plurality of regions on an electrically insulating substrate, and a step of providing an electrically insulating film in synchronization with a negative pattern of the electrically conductive film. , A voltage is selectively applied to each electrode, a polymer dispersion type liquid crystal layer is formed on the electrode to which a voltage is applied by an electrodeposition coating method, and the above operation is repeated, whereby a multicolor high And a step of separately coating a molecular dispersion type liquid crystal layer.