JP2002277862A - Liquid crystal light modulator and display device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal light modulator which can be made light- weight, is superior in portability and storability, has a high speed and a high light contrast and is free of after image and image persistence, and to provide a display device using this liquid crystal light modulator. SOLUTION: The liquid crystal light modulator is provided with a liquid crystal-resin complex 3, where an independent porous film obtained by flocculating fine resin fibers is impregnated with a liquid crystal, two transparent substrates 5a and 5b, which have transparent electrodes formed and are arranged on both sides of the liquid crystal-resin complex with the transparent electrodes inside, and a voltage source 8, which applies positive or negative DC or AC voltage to the two transparent electrodes. Thus a display panel, having a large area, is easily manufactured because the porous film having a mechanical strength keeps the gap between the two transparent substrates fixed, and the weight is reduced because it is unnecessary to use thick glass panels, and portability and storability are improved, because the display panel can be bent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal light modulator and a display device using the same, and more particularly, to a liquid crystal light modulator that modulates light intensity using a liquid crystal and a display device using the same.

[0002]

2. Description of the Related Art An optical modulator can be realized by applying an electro-optic effect of a liquid crystal, which changes an alignment state of liquid crystal molecules by applying an electric field to the liquid crystal. Liquid crystal light modulators have been attracting attention as electro-optical elements for displays in recent years because they operate at a lower voltage than optical crystals exhibiting other electro-optical effects and can be made with a relatively large area. .

As one of such liquid crystal light modulators, there is an element in which a fine structure of a synthetic resin is formed in a liquid crystal and the liquid crystal alignment is three-dimensionally controlled by the alignment regulating force. It is known that in a composite composed of liquid crystal and synthetic resin, a high-speed response can be obtained compared to a liquid crystal optical modulator that does not disperse a polymer because the alignment regulating force acts on the resin surface in addition to the substrate surface. It is expected to be applied to flat displays and projection displays.

Conventionally, as a device containing a liquid crystal / resin composite, a liquid mixture of a synthetic resin material (monomer, oligomer, etc.) dissolved in liquid crystal is sandwiched between transparent substrates, and then a photopolymerization reaction of the resin material (see References). 1 NA Vaz, G .;
W. Smith and G.S. P. Montgomer
y, Jr. : "A light control fi
lm composed of liquid cry
stall drops dispersed i
n an UV-curable polymer ",
Mol. Cryst. Liq. Cryst. , Vol.
146, pp. 1-15 (1987)) and thermal polymerization reaction (Ref. 2, NA Vaz, GW Smith).
and G. P. See Montgomery, Jr. : "A
lightcontrol film compos
ed of liquid crystal drop
Lets dispersed in an epox
ymatrix ", Mol. Cryst. Liq. Cr
yst. , Vol. 146, pp. 17-34 (198
According to 7)), there is a liquid crystal light modulator in which a synthetic resin and a liquid crystal are separated.

[0005]

However, the optical modulators of References 1 and 2 have the following problems. In order to keep the thickness of the liquid crystal / resin composite constant, a gap must be precisely formed between the two glass substrates.
It is difficult to manufacture a large-area display panel. In addition, since a glass substrate is used, the weight of the display panel increases with an increase in the area of the element, which causes problems such as poor portability and storage.

Further, in order to obtain high-speed light modulation and a high contrast ratio, it is necessary to form a fine polymer structure in the liquid crystal. The polymer and liquid crystal must be separated. In this case, photodecomposition of liquid crystal and synthetic resin due to strong ultraviolet light irradiation is unavoidable, the decomposition products become ionic impurities and the electrical resistance of the composite decreases, and the display is driven by active matrix or simple matrix. When the apparatus is configured, there is a problem that image quality is deteriorated due to an afterimage or burn-in in which a display remains even after voltage is removed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is intended to provide a liquid crystal light modulator which can be reduced in weight, is excellent in portability and storage properties, has a high speed and a high light contrast ratio, and has no afterimage or image sticking. It is an object of the present invention to provide a display device.

[0008]

According to a first aspect of the present invention, there is provided a liquid crystal / resin composite in which liquid crystal is penetrated into a self-supporting porous film in which fine resin fibers are aggregated, and a transparent electrode is formed. Two transparent substrates sandwiching the liquid crystal / resin composite with the transparent electrode inside and the transparent electrode fixed to the liquid crystal / resin composite; and a positive or negative DC voltage applied to the two transparent electrodes. Or, by having a voltage source for applying an AC voltage, a porous membrane having mechanical strength
Since the gap between the two transparent substrates is kept constant, it is easy to manufacture a large-sized display panel, and it is not necessary to use a thick glass substrate, so that the weight can be reduced and the display panel can be bent. Therefore, portability and storability are improved.

According to the second aspect of the invention, the directions of the resin fibers are aligned in one direction, and in the third aspect of the invention, the surface molecules of the resin fibers are oriented in the direction of the fibers. In addition, a high contrast ratio can be obtained by orienting the liquid crystal in a high order.

The invention according to claim 8 is a liquid crystal or resin composite comprising a liquid crystal and a synthetic resin in which fine particles having high surface wettability are dispersed in a liquid crystal or a synthetic resin material, and a transparent electrode formed on each of the transparent electrodes. Two transparent substrates sandwiching the liquid crystal / resin composite with the electrodes inside, and the transparent electrode fixed to the liquid crystal / resin composite, and a positive or negative DC voltage or AC applied to the two transparent electrodes. By having a voltage source for applying a voltage, a tightly bound composite structure can be formed without irradiating strong ultraviolet light, and a high-speed and light-contrast liquid crystal light modulator and a display device with no afterimage or image sticking can be realized. .

According to the twelfth aspect of the present invention, since the transparent substrate is a plastic film, a light-weight and bendable liquid crystal light modulator can be formed.

According to a thirteenth aspect of the present invention, by performing display using the liquid crystal light modulator according to any one of the first to twelfth aspects, the weight can be reduced, the portability and storage properties are excellent, and the high speed can be achieved. In addition, it is possible to realize a display device with a high light contrast ratio and no afterimage or image sticking.

[0013]

FIG. 1 is a schematic sectional view of a first embodiment of the liquid crystal light modulator according to the present invention. In the figure, the liquid crystal 1 has penetrated into a self-supporting porous film 2 in which fine fibers of a synthetic resin or a natural resin are aggregated, and the liquid crystal / resin composite 3 is attached to transparent substrates 5a and 5b, respectively. It is disposed between the transparent electrodes 4a and 4b. Transparent electrodes 4a, 4b
Is connected to a voltage source 8 for supplying a positive or negative DC voltage or an AC voltage via the lead wires 6a and 6b. Light 10 is incident on one of the transparent substrates 5a,
The light is modulated by the resin complex 3 and becomes the emission light 11.

After the liquid crystal 1 is penetrated into the self-supporting porous film 2 after the liquid crystal / resin composite 3
a, 5b. Porous membrane 2
For example, a cloth in which resin fibers are woven or paper to which resin fibers are fixed can be used. By changing the dispersion density and size of the resin fibers in the porous membrane 2,
The response speed and contrast ratio of light modulation generated by applying an electric field to the resin composite 3 can be controlled. The thickness of the fiber is desirably 1 μm or less, and the thickness of the porous film is suitably 2 μm to 50 μm in order to perform good light modulation.

When the directions of the resin fibers 2 are random and isotropic, the liquid crystal 1 is randomly oriented and the light is scattered, and light modulation can be performed by utilizing the orientation. That is, when no voltage is applied between the transparent electrodes 4a and 4b, the incident light 10 is cut off by scattering by the randomly oriented liquid crystal 1, but when a voltage is applied, the liquid crystal molecules of the liquid crystal 1 are oriented in the direction of the electric field. As a result, the light is transmitted. If the dispersion structure is tight, strong light scattering occurs, so that a high contrast ratio can be obtained.

In the case of a self-holding film in which the direction of the resin 2 is substantially aligned in one direction, the liquid crystal molecules are also oriented in that direction. In this case, by applying a voltage, the birefringence of the liquid crystal can be controlled in accordance with the change in alignment. Therefore, if the liquid crystal / resin composite 3 is narrowed by two polarizing plates, light modulation can be performed. In this case, in order to obtain a high contrast ratio by orienting the liquid crystal in a high order, it is desirable that the surface molecules of the fiber are also oriented in the direction of the fiber. Therefore, as a material of the synthetic fiber 2, a synthetic resin obtained by curing a liquid crystalline monomer or a polymer liquid crystal can be used. In addition, since the liquid crystal 1 is aligned by the porous resin 2, it is not always necessary to provide a polyimide alignment film used for a conventional liquid crystal element on the transparent electrode.

The resin 2 used for the self-supporting porous film having excellent mechanical stability includes acrylic resin, methacrylic resin, epoxy resin, urethane resin, polystyrene, polyvinyl alcohol, or a copolymer thereof (eg, acrylic resin). (Urethane resin), cellulose and the like can be used.

As the liquid crystal 1, a nematic liquid crystal, a cholesteric liquid crystal, or a smectic liquid crystal can be used. However, in order to obtain a high-speed response, a liquid crystal material having a low viscosity and a high elasticity is suitable, and a cyano-based liquid crystal having a large refractive index anisotropy Δn (Δn = abnormal light refractive index ne−ordinary refractive index no) is large. Suitable are biphenyl, terphenyl, pyrimidine, tolan, and fluorine nematic liquid crystals.

When a smectic liquid crystal is used, a ferroelectric liquid crystal having spontaneous polarization and exhibiting a high-speed response is useful.
For example, a Schiff base ferroelectric liquid crystal, an azo ferroelectric liquid crystal, an azoxy ferroelectric liquid crystal, a biphenyl ferroelectric liquid crystal, an ester ferroelectric liquid crystal, or a phenylpyrimidine ferroelectric liquid crystal is preferable. When a ferroelectric liquid crystal is used, the porous film 2 in which the directions of the synthetic fibers are aligned in one direction
Is essential.

The transparent substrates 5a and 5b have a thickness of 0.3
A thin glass plate of 0.6 mm or less can be used, including a flexible plastic film such as polycarbonate, polyethylene terephthalate, or polyether sulfone having a thickness of 0.6 mm or less. In particular, transparent substrates 5a and 5b of a plastic film and a self-supporting liquid crystal / resin composite 3
By integrating them, a light-weight and bendable liquid crystal light modulator can be configured.

The transparent electrodes 4a and 4b are doped with tin.
Indium oxide (ITO: In) ₂O₃: Sn) etc.
Is preferred. To avoid short circuit between the transparent electrodes 4a and 4b
Organic or inorganic oxides (eg, SiO 2₂, Ti
O₂) Between the alignment film and the transparent electrodes 4a and 4b.
Can also be provided.

By providing a backlight for the liquid crystal light modulator, a high-speed and high-contrast display device can be constructed. On the other hand, by providing a reflection plate or a diffusion plate for reflecting light in the liquid crystal light modulator, it is possible to configure a reflection type display device with low power consumption without using a backlight.

As a first example, a nematic liquid crystal 1 having a large refractive index anisotropy (BL-008, manufactured by Merck) is penetrated into a porous film (copy paper) in which cellulose fibers are aggregated, and two transparent electrodes ( A liquid crystal light modulator was prototyped by using a glass substrate with a thickness of 72 nm). When an AC voltage of 100 Vrms or more is applied between the transparent electrodes,
It was confirmed that the element changed from the light scattering state to transparent, and that the transmitted light could be modulated.

As described above, according to this embodiment, the liquid crystal is made to penetrate into the porous film made of the resin fiber and is sandwiched between the transparent substrates, so that the liquid crystal optical modulator and the display device having a large area, light weight and flexibility are provided. Can be provided.

FIG. 2 is a schematic sectional view of a liquid crystal light modulator according to a second embodiment of the present invention. In the figure, a liquid crystal / resin composite 23 in which a three-dimensional mesh-like or granular synthetic resin 22 is dispersed in a liquid crystal 21 is provided on transparent substrates 25a and 25b, respectively.
Are disposed between the transparent electrodes 24a and 24b attached to the. In the liquid crystal / resin composite 23, fine particles 27 are dispersed. The transparent electrodes 24a and 24b are lead wires 26.
Via a and 26b, it is connected to a voltage source 28 for supplying a positive or negative DC voltage or AC voltage. Light 30 enters from one of the transparent substrates 25a, and is light-modulated by the liquid crystal / resin composite 23 to become outgoing light 31.

The liquid crystal / resin composite 23 is a liquid mixture of the raw material (monomer, oligomer, etc.) of the synthetic resin 22 and the liquid crystal 21. Formed by The fine particles 27 have a role of promoting the separation of the liquid crystal 21 or the synthetic resin 22 from the liquid mixture. By dispersing the fine particles 27 and changing their dispersion density and size, the form of the composite structure can be controlled.
It is possible to control the response speed of light modulation and the contrast ratio generated by applying an electric field to the device.

As a material of the fine particles 27, it is preferable to use a transparent material having a high surface wettability with respect to the liquid crystal 21 or the synthetic resin 22, and an inorganic material (such as SiO ₂ ).
And organic materials (eg, polyester, polyethylene, and polystyrene) can be used. Further fine particles 27
Can have a spherical shape or a rod shape, and the maximum size is 2 μm so as not to directly affect the liquid crystal alignment.
The following is desirable.

The mixing ratio between the liquid crystal 21 and the resin 22 can be set arbitrarily, but if it is less than 1% by weight, it is difficult to obtain the effect of controlling the liquid crystal alignment. In the liquid crystal / resin composite 23, the synthetic resin 22 can be dispersed in a three-dimensional network or a granular form by reducing the mixing ratio of the synthetic resin 22 to the liquid crystal 21. When the compounding ratio of the synthetic resin 22 is relatively large (for example, 40% by weight or more), it is possible to disperse the liquid crystal in the form of droplets.

When the dispersion form of the synthetic resin 22 is isotropic, the liquid crystal 21 is randomly oriented and the light is scattered, so that the light can be modulated using this. That is, when no voltage is applied between the transparent electrodes 24a and 24b, the incident light 30 is cut off by scattering. However, when a voltage is applied, the liquid crystal molecules are aligned in the direction of the electric field and become uniform. It becomes transparent. If the composite structure is tight, strong light scattering occurs, so that a high contrast can be obtained.

The dispersion form of the synthetic resin 22 is made anisotropic in one direction (for example, the liquid crystal / resin composite 23
(The case where the network structure of (1) is elongated in one direction, or the dispersed synthetic resin 22 particles or liquid crystal droplets have an elongated ellipsoidal shape), and the orientation of liquid crystal molecules is also aligned in one direction. In this case, by applying a voltage, the birefringence of the liquid crystal can be controlled in accordance with the change in alignment. Therefore, if the liquid crystal / resin composite 23 is narrowed by two polarizing plates, light can be modulated. In order to increase the order of the liquid crystal alignment and obtain a high contrast ratio, a three-dimensional network configuration of the synthetic resin 22 including elongated fibers oriented is useful.

The synthetic resin 22 used in the liquid crystal / resin composite 23 includes acrylic resin, methacrylic resin, epoxy resin, urethane resin, polystyrene, polyvinyl alcohol formed by heat curing or reaction curing as well as the above-mentioned photocuring. Alternatively, a copolymer thereof (for example, an acrylic urethane resin) can be used. Further, in order to make the composite structure anisotropic, the liquid mixture of the liquid crystal 21 and the synthetic resin
Need to be separated and precipitated. In such a case, a resin material obtained by curing a liquid crystal monomer having excellent solubility in the liquid crystal 21 is preferable. Since the molecules of the liquid crystalline monomer are fixed while being oriented together with the liquid crystal 21, the cured synthetic resin exerts a strong alignment regulating force on the liquid crystal molecules.

In order to determine the molecular orientation of the liquid mixture of the liquid crystal 21 and the raw material of the synthetic resin 22 in one direction, the transparent electrode 2
4a and 24b, it is necessary to apply an alignment film, such as a polyimide resin, a polyvinyl alcohol resin, a polyvinyl alcohol resin, which is subjected to a friction (rubbing) treatment or a selective photodecomposition treatment by irradiation with polarized ultraviolet light. S deposited
iOx (x is 1 or more and 2 or less) is preferable. Alternatively, it is also possible to use a cinnamate resin or a polyimide resin in which a monomer in one direction is selectively cross-linked and polymerized by irradiation with polarized ultraviolet light.

As the liquid crystal 21, a nematic liquid crystal, a cholesteric liquid crystal, and a smectic liquid crystal 21 can be used. However, in order to obtain a high-speed response, a liquid crystal material having low viscosity and high elasticity is suitable.
A cyano-based, biphenyl-based, terphenyl-based, pyrimidine-based, tolan-based, or fluorine-based nematic liquid crystal having a large (△ n = extraordinary light refractive index ne-ordinary light refractive index no) is suitable. When a smectic liquid crystal is used, a ferroelectric liquid crystal having spontaneous polarization and exhibiting a high-speed response is useful. For example, Schiff base ferroelectric liquid crystal, azo ferroelectric liquid crystal,
Azoxy ferroelectric liquid crystal, biphenyl ferroelectric liquid crystal,
An ester-based ferroelectric liquid crystal or a phenylpyrimidine-based ferroelectric liquid crystal is preferable. In order to uniformly orient the ferroelectric liquid crystal, it is necessary to use a resin 22 which is anisotropic in one direction.
Is preferred.

As the transparent substrates 25a and 25b, a flexible plastic film such as polycarbonate, polyethylene terephthalate, polyether sulfone, or a glass plate can be used. By integrating the plastic film transparent substrates 25a and 25b and the self-supporting liquid crystal / resin composite 23, it is possible to configure a light-weight and flexible optical modulator that can be bent.

The transparent electrodes 24a and 24b are made of indium oxide doped with tin (ITO: In ₂ O ₃ : Sn).
And the like are preferred. In order to avoid a short circuit between the transparent electrodes 24a and 24b, a transparent organic substance or inorganic oxide (for example, SiO 2
₂ , TiO ₂ ) or the like to form transparent layers 24a and 24b.
It is also possible to provide between them.

By providing a backlight for such a liquid crystal light modulator, a high-speed and high-contrast display device can be constructed. On the other hand, by providing a reflection plate or a diffusion plate for reflecting light in the liquid crystal light modulator, it is possible to configure a reflection type display device with low power consumption without using a backlight.

As a second embodiment, a ferroelectric liquid crystal 21 (Chisso, refractive index anisotropy Δn = 0.15) and a synthetic resin 2
A liquid crystal light modulator manufactured using an ultraviolet curable acrylic monomer (Dainippon Ink, UCL-001), which is a raw material of No. 2, will be described. The fabrication method is as follows.
First, the two glass substrates 25a and 25b are respectively
A transparent electrode 2 is formed by evaporating In ₂ O ₃ : Sn with a thickness of 72 nm.
4a, 24b are formed, and the transparent electrodes 24a, 24b are further formed.
The polyimide resin (JSR
AL-1254) was applied to form an alignment film having a thickness of 50 nm. The alignment film is rubbed in one direction with a fine rayon brush (rubbing), and a plastic microparticle 27 (JSR) having a diameter of 2 μm is formed in a gap between two substrates having alignment films.
DYNOSHIRES-1019) in a small amount (0.
1% by weight) liquid crystal / monomer mixture (monomer concentration 2
0% by weight).

It was found by optical measurement that the liquid mixture was molecularly oriented in the rubbing direction of the alignment film. Finally, as a result of irradiation with ultraviolet light (center wavelength 365 nm), fine particles 2
It was found that the precipitation of the synthetic resin 22 started with the nucleus 7, and the fibrous network of the synthetic resin 22 grew from the nucleus in the rubbing direction and was fixed. Thereby, the fine particles 2
7, it was confirmed that the structure of the synthetic resin 22 could be controlled.

As described above, according to the present embodiment, the polymer structure can be controlled by dispersing fine particles having a high affinity for the liquid crystal or the synthetic resin in the process of forming the liquid crystal / resin composite. A high-contrast liquid crystal light modulator and a display device can be provided.

[0040]

As described above, the first aspect of the present invention provides
A liquid crystal / resin composite in which liquid crystal is permeated into a self-supporting porous film in which fine resin fibers are aggregated, and a transparent electrode is formed, and the transparent electrode is placed inside the liquid crystal / resin composite, and the transparent electrode Is fixed to the liquid crystal / resin composite 2
By having one transparent substrate and a voltage source for applying a positive or negative DC or AC voltage to the two transparent electrodes, the porous film having mechanical strength can maintain a constant gap between the two transparent substrates. In addition, it is easy to manufacture a large-sized display panel, and it is not necessary to use a thick glass substrate. Therefore, the weight can be reduced, and the display panel can be bent, so that portability and storability are improved.

According to the second aspect of the invention, the directions of the resin fibers are aligned in one direction, and in the third aspect of the invention, the surface molecules of the resin fibers are oriented in the direction of the fibers. In addition, a high contrast ratio can be obtained by orienting the liquid crystal in a high order.

The invention according to claim 8 is a liquid crystal / resin composite comprising a liquid crystal in which fine particles having high surface wettability are dispersed in a liquid crystal or a synthetic resin material and a synthetic resin; Two transparent substrates with the liquid crystal / resin composite sandwiched between them with the transparent electrode fixed to the liquid crystal / resin composite, and a voltage for applying a positive or negative DC or AC voltage to the two transparent electrodes By having the light source, a tightly bound composite structure can be formed without irradiating strong ultraviolet light, and a high-speed and light-contrast liquid crystal light modulator and a display device with no afterimage or image sticking can be realized.

According to the twelfth aspect of the present invention, since the transparent substrate is a plastic film, a light-weight and bendable liquid crystal light modulator can be formed.

According to a thirteenth aspect of the present invention, by performing display using the liquid crystal light modulator according to any one of the first to twelfth aspects, the weight can be reduced, the portability and storage properties are excellent, and the high speed operation is achieved. In addition, it is possible to realize a display device with a high light contrast ratio and no afterimage or image sticking.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a first embodiment of a liquid crystal light modulator according to the present invention.

FIG. 2 is a schematic sectional view of a liquid crystal light modulator according to a second embodiment of the present invention.

[Explanation of symbols]

 1, 21 liquid crystal 2 porous film 3, 23 liquid crystal / resin composite 4a, 4b, 24a, 24b transparent electrode 5a, 5b, 25a, 25b transparent substrate 6a, 6b, 26a, 26b lead wire 8, 28 voltage source 10, Reference Signs List 30 incident light 11, 31 outgoing light 22 synthetic resin 27 fine particles

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G02F 1/137 G02F 1/137 (72) Inventor Yuzuru Tsuchiya 1-10-11 Kinuta, Setagaya-ku, Tokyo Japan Broadcasting Corporation Broadcasting Research Institute F-term (Reference) 2H088 HA01 HA03 HA28 JA14 JA17 JA20 MA02 MA10 2H089 HA02 HA04 QA16 RA11 RA13 RA14 TA01 TA04 TA18 2H090 HB08Y JB03 KA09 KA11 KA12 KA14 KA15 LA16 MA06 MA17 MB01 2NDND NE04 NF14 NF17 NF20

Claims (13)

[Claims] 1. A liquid crystal / resin composite in which liquid crystal is permeated into a self-supporting porous film in which fine resin fibers are aggregated, and a liquid crystal / resin composite in which a transparent electrode is formed and the transparent electrode is on the inside. And two transparent substrates having the transparent electrode fixed to the liquid crystal / resin composite, and a voltage source for applying a positive or negative DC voltage or an AC voltage to the two transparent electrodes. Characteristic liquid crystal light modulator. 2. The liquid crystal light modulator according to claim 1, wherein the directions of the resin fibers are aligned in one direction. 3. The liquid crystal light modulator according to claim 2, wherein surface molecules of the resin fibers are oriented in the direction of the fibers. 4. The liquid crystal light modulator according to claim 1, wherein the resin fiber is a polymer liquid crystal. 5. The liquid crystal optical modulator according to claim 1, wherein a dispersion density and a size of the fibers in the porous film are varied.
Liquid crystal light modulator characterized by controlling response speed and contrast ratio of light modulation. 6. The liquid crystal optical modulator according to claim 1, wherein the porous film is a cloth woven of resin fibers or a paper to which resin fibers are fixed. Light modulator. 7. The liquid crystal optical modulator according to claim 1, wherein the liquid crystal is a nematic liquid crystal, a cholesteric liquid crystal,
A liquid crystal light modulator characterized by being one of smectic liquid crystals. 8. A liquid crystal / resin composite comprising a liquid crystal in which fine particles having high surface wettability with respect to a liquid crystal or a synthetic resin material are dispersed and a synthetic resin; -Two transparent substrates sandwiching a resin composite and the transparent electrode is fixed to the liquid crystal / resin composite; and a voltage source for applying a positive or negative DC voltage or AC voltage to the two transparent electrodes. A liquid crystal light modulator comprising: 9. The liquid crystal light modulator according to claim 8, wherein a response speed and a contrast ratio of light modulation are controlled by changing a dispersion density and a size of the fine particles. 10. The liquid crystal light modulator according to claim 8, wherein the synthetic resin is dispersed in a three-dimensional network or a granular shape.
A liquid crystal light modulator, wherein the liquid crystal is dispersed in a granular form. 11. The liquid crystal optical modulator according to claim 8, wherein the liquid crystal is a nematic liquid crystal, a cholesteric liquid crystal,
A liquid crystal light modulator characterized by being one of smectic liquid crystals. 12. The liquid crystal light modulator according to claim 1, wherein the transparent substrate is a plastic film. 13. A display device which performs display using the liquid crystal light modulator according to claim 1. Description: