JPH08122831A - Sun shade device for vehicle - Google Patents

Abstract

PURPOSE: To provide a vehicle sun shade device by which quantity of transmitting light is adjusted and quantity of incident solar light from a car window is controlled by using an electric sensitive light functioning fluid component. CONSTITUTION: A hollow storing body 18 whose at least opposed part with each other in two countered faces is made transparent is provided on a vehicle window of an automobile or a train or the like. An electric sensitive light functioning fluid component 16 having an electric field arrayed particle is stored in this storing body 18. Transparent electric conductive layers 17, 17 are respectively formed on the opposed face to this storing body 18. A sun screen is easily formed by making the storing body of a vehicle window transparent or untransparent by means of electric feeding condition of the transparent electric conductive layers 17. 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle awning device having a transmitted light amount control mechanism using a fluid composition, and more particularly to controlling the amount of sunlight entering a vehicle such as an automobile or a train. TECHNICAL FIELD The present invention relates to a vehicle shade device for controlling.

[0002]

2. Description of the Related Art In recent years, there have been cases where a curtain that blocks sunlight is attached to a window of a vehicle such as an automobile or a train, or a light shielding sheet is attached. When installing the curtain,
The curtain rail is attached to the upper frame of the window of the vehicle, the suspending tool for moving the curtain rail is inserted into the curtain rail, and the curtain is suspended on the suspending tool. By moving this curtain along the curtain rail, the hanging tool moves along the curtain rail, so that the sunlight is incident on the inside of the vehicle through the window or the sunlight is blocked. When attaching the light shielding sheet, the light shielding sheet is directly attached to the window of the vehicle with a transparent adhesive or the like. This light shielding sheet always shields a certain amount of sunlight.

[0003]

However, in the above-mentioned curtain, it is necessary to attach curtain rails, suspenders, etc., and the space inside the vehicle becomes narrow. Then, it is necessary to move the curtain when the sunlight is blocked, which is a troublesome task for the driver of the vehicle.

Further, since the light shielding sheet is attached to the window of the vehicle, it is difficult to take in much sunlight in the evening when the sunlight is low. And if you want to take in a lot of sunlight like in the winter, you need to peel off the light shield sheet from the vehicle window, and you need to install and remove the light shield sheet depending on the season etc. It was troublesome.

By the way, the inventors of the present invention are conducting research on a novel electro-sensitive optical functional fluid composition (hereinafter abbreviated as EA fluid composition) having a novel electric field arrangement which has never been known. This composition is, for example, a fluid obtained by dispersing solid particles in an electrically insulating medium. When an electric field is applied to the composition, the solid particles cause dielectric polarization, and electrostatic attraction based on the dielectric polarization causes an electric field to be applied to each other. It has the property of forming a chain structure by being coordinately linked and aligned in the direction. In addition, some solid particles have an electrophoretic property, so that when they are applied with an electric field, they are electrophoresed and aligned on the electrode portion.
Some show an arrayed lumpy structure.

The orientation alignment of particles under an electric field is called an electric field alignment effect (hereinafter, abbreviated as EA effect).
Solid particles having such properties are referred to as electric field array particles (hereinafter, abbreviated as EA particles). Further, the EA fluid composition is obtained by dispersing the EA particles as a main constituent in an electrically insulating medium. Then, the inventors of the present invention arrived at the present invention by advancing research on the EA fluid composition having this novel structure. The present invention uses the composition of this novel structure to adjust the amount of transmitted light,
It is an object of the present invention to provide a vehicle awning device for controlling the amount of sunlight incident on a window of a vehicle such as a train.

[0007]

Means for Solving the Problems The above-mentioned problem is a vehicle awning device for controlling the amount of sunlight entering a vehicle such as an automobile or an electric train, and at least two opposing surfaces of a window of the vehicle. A hollow container having a transparent portion facing each other is provided, and an EA fluid composition containing EA particles in an electrically insulating medium is contained in the container, and one of the transparent parts of the container is provided. This is solved by a vehicle awning device in which a transparent conductive layer is formed on the surface and the transparent conductive layer facing the transparent conductive layer on the one surface is formed on the other surface of the transparent portion of the housing.

[0008] One of the transparent conductive layers is formed in a planar shape that covers substantially the entire transparent portion of the container, and the other of the transparent conductive layers is disposed on almost the entire transparent portion of the container. It is preferable to form one comb tooth portion and a second comb tooth portion in which the teeth are alternately inserted between the teeth of the first comb tooth portion.

Further, the EA particles are composed of a core body made of an organic polymer compound and an inorganic substance having an EA effect (hereinafter referred to as EA).
Inorganic formed by the surface layer containing inorganic substances)
It is preferably organic composite particles. Further, the EA
The inorganic substance is preferably an inorganic ion exchanger, silica gel, or an electrosemiconductor inorganic substance, or a mixture thereof. Further, the surface layer may contain pigment particles together with the EA inorganic substance, and the core may contain pigment. Furthermore, the kinematic viscosity of the electrically insulating medium is 1 to
The concentration of solid particles in the electrically insulating medium is in the range of 0.5 to 15% by weight, and the voltage applied from the transparent conductive layer to the solid particles in the EA fluid composition is 0. It is preferably in the range of 0.1 to 5.0 kV / mm.

[0010]

According to the present invention, a hollow container is provided in the window of a vehicle such as an automobile or a train, and this container has a special structure.
Since the fluid composition is filled, the transparent conductive layer formed in the transparent portion of the container is energized to apply an electric field to the EA fluid composition, whereby solids such as inorganic / organic composite particles in the EA fluid composition are applied. The particles are oriented in a particular direction. This allows
When a voltage is applied, the solid particles are coordinately linked in a chain to form a chain, and these chains are arranged in parallel with the direction of the electric field. Will be visible.

If no voltage is applied to the transparent conductive layer,
Solid particles such as inorganic / organic composite particles are not oriented in a specific direction, and the solid particles dispersed in the container diffusely reflect light, and the transparent part of the container looks opaque. By making the housing transparent or opaque in this way, the sunlight is blocked by the inorganic-organic composite particles in the housing, and the amount of sunlight entering a vehicle such as an automobile is controlled.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a first embodiment of a vehicle awning device of the present invention, and FIG. 2 is a sectional view taken along line XX of FIG. As shown in the cross-sectional view of FIG. 2, a vehicle sunshade device A of this example has a pair of transparent substrates 15 and 15 arranged in parallel at a predetermined interval, and a liquid EA fluid composition between them. 16 is enclosed, and the transparent conductive layers 17 are formed on the entire inner surfaces of the transparent substrates 15 and 15 facing each other.

Although not shown in the figure, a seal member is attached to the outer peripheral edge of the transparent substrates 15 and 15, and the transparent substrates 15 and 15 are provided.
The EA fluid composition 16 is enclosed in a plate-shaped hollow transparent container 18 formed by the seal member.
In addition, as shown in FIGS. 3 and 4, electrode portions electrically connected to the transparent conductive layers 17 are formed on the outer peripheral edge portions of the transparent substrates 15 and 15, and each electrode portion is connected to the power source 23. It is connected via the switch 24.

Since the transparent substrates 15 and 15 are required to have the strength capable of accommodating the EA fluid composition 16 therein and to withstand transportation and installation, various glass substrates,
It is preferably composed of a transparent resin substrate made of acrylic resin or the like. The transparent substrates 15 and 15 do not have to be wholly transparent, and may have a structure in which only a portion through which light passes is transparent. Therefore, only the peripheral portion may be composed of an opaque metal frame, a resin frame, or the like, and a transparent glass substrate or a resin substrate may be fitted inside the frame.
The shape is not particularly limited, but a plate-shaped one is usually used.

The EA fluid composition 16 is basically composed of an electrically insulating medium 19 in which inorganic / organic composite particles 30 having the structure shown in FIG. 5 are dispersed. The inorganic / organic composite particles 30 are cores 31 made of an organic polymer compound.
And an EA that covers the surface of the core body 31 and exhibits the EA effect
It is formed by the surface layer 33 made of the inorganic material 32.

Although various kinds of EA inorganic substances 32 are known, preferred examples thereof include hydroxides of polyvalent metals, hydrotalcites, acid salts of polyvalent metals, and the like.
Hydroxyapatite, nasicon-type compounds, clay minerals,
Examples thereof include inorganic ion exchangers composed of potassium titanates, heteropolyacid salts or insoluble ferrocyanides, silica gel, and electrically semiconducting inorganic substances. A core body 31 in which such an EA inorganic substance 32 is made of an organic polymer compound
An electric field aligning effect is provided to the EA fluid composition 16 when the surface layer 33 is formed thereon. Further, the above-mentioned inorganic / organic composite particles 30 are preferably manufactured by a method of forming the surface layer 33 simultaneously with the core body 31.

Examples of the organic polymer compound which can be used as the core 31 of the inorganic / organic composite particles 30 include poly (meth) acrylic acid ester, (meth) acrylic acid ester-styrene copolymer, polystyrene and polyethylene. , Polypropylene, nitrile rubber, butyl rubber, AB
S resin, nylon, polyvinyl butyrate, ionomer, ethylene-vinyl acetate copolymer, vinyl acetate resin,
Examples thereof include one kind or a mixture or copolymer of two or more kinds such as a polycarbonate resin.

A preferred EA inorganic substance 32 which can be used as the surface layer 33 of the inorganic / organic composite particles 30 is an inorganic ion exchanger, an electric semiconductor inorganic substance or silica gel. These exhibit an excellent EA effect when the solid particles are dispersed in the electrically insulating medium 19. Examples of the inorganic ion exchanger include (1) polyvalent metal hydroxides, (2) hydrotalcites, (3) polyvalent metal acid salts, (4) hydroxyapatite, and (5) Nasicon-type compounds. , (6) clay minerals, (7) potassium titanates, (8) heteropolyacid salts, and (9) insoluble ferrocyanide.

The respective inorganic ion exchangers will be described in detail below. (1) Hydroxide of polyvalent metal. These compounds are represented by the general formula MO _x (OH) _y (M is a polyvalent metal, x is a number of 0 or more, and y is a positive number), and examples thereof include titanium hydroxide and hydroxide. Zirconium, bismuth hydroxide, tin hydroxide, lead hydroxide, aluminum hydroxide, tantalum hydroxide,
Examples include niobium hydroxide, molybdenum hydroxide, magnesium hydroxide, manganese hydroxide, and iron hydroxide. here,
For example, titanium hydroxide is hydrous titanium oxide (also known as metatitanic acid or β-titanic acid, TiO (OH) ₂ ) and titanium hydroxide (also known as orthotitanic acid or α-titanic acid, Ti
(OH) ₄ ) is included, and the same applies to other compounds.

(2) Hydrotalcites. These compounds have the general formula M ₁₃ Al ₆ (OH) ₄₃ (CO) ₃ · 12H
It is represented by ₂ O (M is a divalent metal), and the divalent metal M is, for example, Mg, Ca or Ni. (3) Acid salt of polyvalent metal. These are, for example, titanium phosphate, zirconium phosphate, tin phosphate, cerium phosphate,
Chromium phosphate, zirconium arsenate, titanium arsenate, tin arsenate, cerium arsenate, titanium antimonate, tin antimonate, tantalum antimonate, niobium antimonate, zirconium tungstate, titanium vanadate, zirconium molybdate, selenate Examples include titanium and tin molybdate.

(4) Hydroxyapatite. These are, for example, calcium apatite, lead apatite, strontium apatite, cadmium apatite and the like. (5) Nasicon type compound. These include (H ₃ O)
Although Zr ₂ (PO ₄ ) _{3 and} the like are included, a Nasicon type compound in which H ₃ O is replaced with Na can also be used in the present invention. (6) Clay mineral. These are, for example, montmorillonite, sepiolite, bentonite and the like, and sepiolite is particularly preferable.

(7) Potassium titanates. These are general formulas aK ₂ O · bTiO ₂ · nH ₂ O (a is a positive number satisfying 0 <a ≦ 1, b is a positive number satisfying 1 ≦ b ≦ 6, and n is a positive number). , For example, K ₂ · TiO ₂ ·
2H ₂ O, K ₂ O ・ 2TiO ₂・ 2H ₂ O, 0.5K ₂ O ・
TiO ₂ · 2H ₂ O and K ₂ O · 2.5 TiO ₂ · 2H ₂
O etc. In addition, among the above compounds, a compound in which a or b is not an integer is easily synthesized by subjecting a compound in which a or b is an appropriate integer to an acid treatment and replacing K with H. (8) Heteropolyacid salt. These have the general formula H ₃ AE ₁₂ O ₄₀
Represented by nH ₂ O (A is phosphorus, arsenic, germanium, or silicon, E is molybdenum, tungsten, or vanadium, and n is a positive number), for example, ammonium molybdophosphate, and ammonium tungstophosphate. Is. (9) Insoluble ferrocyanide. These are compounds represented by the following general formula. M _b-pxa A [E (CN) ₆ ] (M
Is an alkali metal or hydrogen ion, A is zinc, copper, nickel, cobalt, manganese, cadmium, iron (III)
Or a heavy metal ion such as titanium, E is iron (II), iron (III), cobalt (II) or the like, and b is 4
Or 3, a is the valence of A, and p is 0 to b / a
Is a positive number. ) These include, for example, Cs ₂ Zn [Fe
(CN) ₆ ] and K ₂ Co [Fe (CN) ₆ ] such as insoluble ferrocyan compounds.

The inorganic ion exchangers (1) to (6) each have an OH group, and some or all of the ions present at the ion exchange sites of these inorganic ion exchangers are different ions. Those substituted with (hereinafter, referred to as a substitutional inorganic ion exchanger) are also included in the inorganic ion exchanger of the present invention. That, R-M ¹ inorganic ion exchanger described above (M ¹ represents an ion species of the ion exchange sites) is expressed as a part or all of M ¹ in the R-M ^1, the ion exchange reaction below A substituted inorganic ion exchanger in which an ionic species M ² different from M ¹ is substituted by
It is an inorganic ion exchanger in the present invention. xR−M ¹ + yM ² → Rx− (M ² ) y + xM ¹ (where x and y represent the valences of the ion species M ² and M ¹ , respectively). M ¹ varies depending on the type of the inorganic ion exchanger having an OH group, but when the inorganic ion exchanger exhibits a cation exchange property, M ¹ is generally H ⁺ , and in this case, M ² is an alkali metal or an alkali. Any metal ion other than H ⁺ , such as earth metals, polyvalent typical metals, transition metals or rare earth metals. When the inorganic ion exchanger having an OH group exhibits anion exchange property, M ¹ is generally OH ^−.
Where M ² is, for example, I, Cl, SCN, N
It is any of general anions other than OH ⁻ such as O ₂ , Br, F, CH ₃ COO, SO ₄ or CrO ₄ and complex ions.

Further, although the OH group is once lost by the high temperature heat treatment, the inorganic ion exchanger which has the OH group again by the operation of immersing in water is the inorganic ion after the high temperature heat treatment. Exchangers and the like are also one kind of inorganic ion exchangers that can be used in the present invention, and specific examples thereof include a Nasicon-type compound such as (H ₃ O) Zr.
₂ (PO ₄₎ obtained by heating ₃ HZr ₂ (PO _{4) 3} and high-temperature heat treatment of hydrotalcite (500 to 700
Heat treated at ℃). These inorganic ion exchangers can be used not only in one kind but also in many kinds simultaneously as a surface layer. It is particularly preferable to use a hydroxide of a polyvalent metal and an acid salt of a polyvalent metal as the above-mentioned inorganic ion exchanger.

Another preferable EA inorganic substance that can be used as the surface layer 33 of the inorganic-organic composite particles 30 is a metal oxide having an electric conductivity of 10 ³ to 10 ^-11 Ω ^-1 / cm at room temperature.
Metal hydroxide, metal oxide hydroxide, inorganic ion exchanger,
Alternatively, at least one of these may be metal-doped, or at least one of these may be applied as an electric semiconductor layer on another support regardless of the presence or absence of metal doping.

The other preferable EA inorganic substances will be described in more detail below. (A) Metal oxide: For example, SnO ₂ , amorphous titanium dioxide (manufactured by Idemitsu Petrochemical Co., Ltd.) and the like. (B) Metal hydroxide: Titanium hydroxide, niobium hydroxide or the like. Titanium hydroxide here means hydrous titanium oxide (manufactured by Ishihara Sangyo Co., Ltd.), metatitanic acid (also known as β-titanic acid, T
iO (OH) ₂ ) and orthotitanic acid (also known as α-titanic acid, Ti (OH) ₄ ). (C) Metal oxide hydroxide: For example, FeO
(OH) (goethite) and the like can be mentioned.

(D) Hydroxide of polyvalent metal: equivalent to those described in (1) above. (E) Hydrotalcites: equivalent to those described in (2) above. (F) Acid salt of polyvalent metal: equivalent to the one described in (3) above. (G) Hydroxyapatite: equivalent to the one described in (4) above. (H) Nashicon type compound: equivalent to the one described in (5) above. (I) Clay mineral: equivalent to the one described in (6) above. (J) Potassium titanates: equivalent to those described in (7) above. (K) Heteropolyacid salt: equivalent to the one described in (8) above. (L) Insoluble ferrocyanide: equivalent to those described in (9) above.

(M) Metal-Doped EA Inorganic Material: This is obtained by doping the EA inorganic material with a metal such as antimony (Sb) in order to increase the electric conductivity of the EA inorganic materials (A) to (L). For example, antimony (S
b) Doping tin oxide (SnO ₂ ) and the like can be mentioned. (N) EA inorganic material applied as an electric semiconductor layer on another support: for example, titanium oxide, silica as a support,
Examples thereof include inorganic particles such as alumina and silica-alumina, or organic polymer particles such as polyethylene and polypropylene, to which antimony (Sb) -doped tin oxide (SnO ₂ ) is applied as an electric semiconductor layer. . The particles to which the EA inorganic substance has been applied in this way are EA inorganic substances as a whole. These EA inorganic substances may be used not only in one kind but also in two kinds or more simultaneously as a surface layer.

As the electrically insulating medium 19 used in the above-mentioned EA fluid composition 16, it is possible to use all the conventionally known ones used in the electric field arranging fluid. For example, diphenyl chloride, butyl sebacate, aromatic polycarboxylic acid higher alcohol ester, halophenyl alkyl ether, trans oil, chlorinated paraffin, fluorine oil, silicone oil or fluorosilicone oil, etc. Any fluid can be used as long as it has high strength, is chemically stable, and can stably disperse the inorganic / organic composite particles, and a mixture thereof can also be used.

The electrically insulating medium 19 can be colored according to the purpose. In the case of coloring, it is preferable to use a type and amount of an oil-soluble dye or a dispersible dye that is soluble in the selected electrically insulating medium 19 and does not impair its electrical characteristics. In addition to this, the electrically insulating medium 19 includes
A dispersant, a surfactant, a viscosity adjusting agent, an antioxidant, a stabilizer and the like may be contained.

Such inorganic / organic composite particles 30 can be manufactured by various methods. For example, a particulate core body 31 made of an organic polymer compound and a particulate EA
There is a method in which the inorganic substance 32 is transported by a jet stream and collides with it. In this case, EA is formed on the surface of the particulate core 31.
The fine particles of the inorganic material 32 collide with each other at a high speed and are fixed to be fixed to the surface layer
3 is formed. Another example of the manufacturing method is a method in which the particulate core body 31 is suspended in a gas and a solution of the EA inorganic substance is atomized and sprayed on the surface. In this case, the surface layer 33 is formed by adhering the solution to the surface of the core body 31 and drying it.

However, a preferred manufacturing method for manufacturing the inorganic / organic composite particles 30 is a method of forming the surface layer 33 at the same time as the core body 31. In this method, for example, when emulsion-polymerizing, suspension-polymerizing, or dispersion-polymerizing a monomer of an organic polymer compound forming the core body 31 in a polymerization medium, a fine particle EA inorganic substance 32 is contained in the monomer or the polymerization medium. The idea is to let it exist inside. Water is preferred as the polymerization medium, but a mixture of water and a water-soluble organic solvent can be used, and an organic poor solvent can also be used. According to this method, the monomers are polymerized in the polymerization medium to form core particles, and at the same time, the fine particle EA inorganic substance 32 is oriented in a layer on the surface of the core 31 to cover the surface of the core 31, and the surface layer 33 is formed. Form.

When the inorganic / organic composite particles are produced by emulsion polymerization or suspension polymerization, most of the fine particles of the EA inorganic substance 32 are obtained by combining the hydrophobic property of the monomer and the hydrophilic property of the EA inorganic substance 32. Can be oriented on the surface of the core particles. According to the method for simultaneously forming the core body 31 and the surface layer 33, the EA inorganic particles 32 are densely and firmly adhered to the surface of the core body 31 particles made of an organic polymer compound, and the robust inorganic / organic composite particles 30 are obtained. It is formed.

Inorganic / organic composite particles 30 used in the present invention
Does not necessarily have to be spherical, but when the particulate core 31 is manufactured by the controlled emulsion / suspension polymerization method, the resulting inorganic / organic composite particles 30 have a substantially spherical shape. Become. In addition, since the spherical shape allows light to be scattered in all directions when adjusting the amount of transmitted light, the spherical shape is more advantageous than the irregular shape. The particle size of the inorganic / organic composite particles 30 is not particularly limited, but it is preferably 0.1 to 500 μm, particularly preferably 5 to 200 μm. The particle size of the fine particle EA inorganic substance 32 at this time is not particularly limited, but is preferably 0.005 to 100 μm, and more preferably 0.01 to 10 μm.

In such an inorganic / organic composite particle 30, the weight ratio of the EA inorganic substance 32 forming the surface layer 33 and the organic polymer compound forming the core body 31 is not particularly limited, but (EA inorganic substance) : (Organic polymer compound) ratio in the range of (1-60) :( 99-40), especially (4-3)
0): (96 to 70) is preferable. Here, if the weight ratio of the EA inorganic substance 32 is less than 1%, the electric field arranging effect of the obtained EA fluid composition is insufficient.
If it exceeds%, an excessive current flows in the obtained EA fluid composition 16. The specific gravity of these inorganic / organic composite particles 30 is
Since the organic polymer compound having a relatively small specific gravity is used for the core body 31, it can be made relatively smaller than the specific gravity of the EA inorganic substance 32 forming the surface layer 33. The specific gravity of the inorganic / organic composite particles 30 can be freely adjusted depending on the type and ratio of the organic polymer compound and the EA inorganic substance to be used, but in general, the specific gravity is 1.0 to 1.0 in relation to the electrically insulating medium used. It is adjusted to about 2.0. In this case, if the difference in specific gravity from the electrically insulating medium is large, the EA particles may settle in the medium by gravity, and uniform dispersion may not be possible.

Surface layer 33 of the above-mentioned inorganic / organic composite particles 30
Alternatively, the core body 31 may include a pigment. The pigment that can be used for the surface layer 33 is a pigment. When the surface layer 33 made of the EA inorganic material 32 is formed on the core body 31 by the above method, this pigment is preferably mixed with the EA inorganic material 32 and used to be contained in the surface layer 33. Core 3
When 1 contains a dye, any dye or pigment generally known for synthetic resins can be used.
This dye can be contained in the core body 31 by mixing it in the monomer forming the core body 31 in advance and then polymerizing the monomer, or by kneading it into a synthetic resin to be the core body 31. By using the inorganic / organic composite particles 30 containing a pigment in the surface layer 33 or the core body 31, or both of them, the scattered light of the obtained EA fluid composition 16 when no voltage is applied is colored in an arbitrary color. can do.

For example, white color can be obtained by mixing titanium hydroxide or silica gel, and blue color can be obtained by mixing the blue pigment phthalocyanine blue (Cyanine Blue S-32 manufactured by Dainichiseika Kogyo Co., Ltd.). Can be colored, yellow pigment First Yellow (Dainichi Seika Kogyo Co., Ltd., NL First Yellow 5G (S))
Can be colored yellow by mixing with. Furthermore, black iron (III) tetraoxide (Fe ₃
It can be colored black by mixing O ₄ ) and can be colored red by mixing red ferric trioxide (Fe ₂ O ₃ ) which is an electric semiconductor inorganic substance.

Inorganic / organic composite particles 30 produced by the various methods described above, particularly the method of simultaneously forming the core body 31 and the surface layer 33, generally have the surface layer 33 wholly or partly of an organic polymer substance, Covered with a thin film of dispersants, emulsifiers and other additives used in the manufacturing process,
In some cases, the electric field arranging effect of the EA inorganic particles 32 may not be sufficiently exhibited. This thin film of inert material can be easily removed by polishing the surface of the particles.

The surface of the inorganic / organic composite particles 30 can be polished by various methods. For example, the inorganic / organic composite particles 30 may be dispersed in a dispersion medium such as water and the mixture may be stirred. On this occasion,
It is also possible to use a method in which an abrasive such as sand particles or balls is mixed in the dispersion medium and stirred with the inorganic / organic composite particles 30, or a method in which a grinding wheel is used for stirring. For example, it is also possible to perform the stirring by dry method using the inorganic / organic composite particles 30, the abrasive as described above, and a grinding wheel without using the dispersion medium.

A more preferable polishing method is a method in which the inorganic / organic composite particles 30 are agitated by a jet stream or the like. This is a method in which the particles themselves are violently collided with each other in a gas phase and polished, and a preferable method in that an inert substance exfoliated from the surface of the particles can be easily separated by classification without the need for another abrasive. Is. In the above jet stream agitation, the type of equipment used for it,
Although it is difficult to specify the polishing conditions depending on the stirring speed, the material of the inorganic / organic composite particles, etc., it is generally preferable to stir the jet stream at a stirring speed of 6000 rpm for about 0.5 to 15 minutes.

The EA fluid composition 16 used in the present invention can be produced by uniformly stirring and mixing the above-mentioned inorganic / organic composite particles 30 in the electrically insulating medium 19 together with other components such as a dispersant. it can. As the stirrer, any stirrer normally used for dispersing solid particles in a liquid dispersion medium can be used.

Next, the inorganic / organic composite particle concentration, the kinematic viscosity of the electrically insulating medium 19 and the applied voltage, which are effective when used in the vehicle shade device according to the present invention, will be described. The particle concentration of the inorganic / organic composite particles 30 in the EA fluid composition 16 used in the present invention is not particularly limited, but is preferably 0.5 to 15% by weight. If the particle concentration is less than 0.5% by weight, a sufficient transmitted light control effect cannot be obtained, and if it is 15% by weight or more, the particle concentration is too high, and a large amount of the inorganic-organic composite particles 30 are contained in the entire EA fluid composition 16. Since the particles are dispersed, there is a possibility that the sense of transparency may not be obtained even if the electric field is applied as described later to control the orientation of the inorganic / organic composite particles 30 ....

Next, the kinematic viscosity of the electrically insulating medium 19 used in the present invention is preferably in the range of 1 to 3000 cSt. When the kinematic viscosity is less than 1 cSt, a large amount of volatile components are mixed in the dispersion medium, resulting in insufficient storage stability of the EA fluid, and when the kinematic viscosity is more than 3000 cSt, foaming is difficult to come off, which is not preferable. When air bubbles are left in the electrically insulating medium, there is a risk of partial discharge in a micro region inside the air bubbles during energization to cause sparks and deterioration of insulation. The range of kinematic viscosity is 10 to 1
000 cSt is more preferable range, 10 to 100 cSt
Is a more preferable range.

Next, as the voltage applied to the EA fluid composition 16, for example, an arbitrary electric field can be applied in the range of 0.1 to 5.0 kV / mm, but an electric field larger than this range should be applied. You can Further, in this applied voltage range, it is more preferable to set it in a range of 0.25 to 1.5 kV / mm.

Next, the principle of obtaining a desired display by controlling the amount of transmitted light using the vehicle shade device A shown in FIG. 1 will be described. FIG. 3 shows a state in which the switch 24 is opened and the transparent conductive layers 17 and 17 are not energized. In this state, no electric field acts on the inorganic-organic composite particles 30, so that the inside of the electrically insulating medium 19 is Will randomly float in. When light enters the housing 18 in this state, the light is scattered in various directions due to the presence of the inorganic-organic composite particles 30, so that the housing 18 becomes opaque.
For example, when a titanium hydroxide-based material is used as the EA inorganic material 32, the color tone becomes cloudy. When either or both of the surface layer 33 of the inorganic / organic composite particles and the core body 3 contain a pigment, the container 18 is colored with the pigment. Here, the inorganic / organic composite particles 30
If is spherical, light is scattered in all directions, so
Light is less likely to be converged in a specific direction.

Next, as shown in FIG. 4, when the switch 24 is closed to energize the transparent conductive layers 17 and 17, innumerable inorganic / organic composite particles 30 are inserted between the transparent conductive layers 17 and 17. To form a chain 3 by connecting in a direction perpendicular to
It is possible to have a 0 ′ structure, and at the same time, each chain 30 ′ can be oriented in parallel. That is, the ratio of the inorganic-organic composite particles 30 dispersed in the electrically insulating medium 19 is about 10% by weight or less as described above and is small as a whole. With the above structure, there is a space between the chain-like bodies 30 ′ that is considerably wider than the diameter of the inorganic-organic composite particles 30, and as a result, most of the light incident in the thickness direction of the housing body 18 is It passes through the storage body 18 without being attenuated. Therefore, the container 18 can be made transparent. By the above operation, the housing 18 can be changed from the opaque state to the transparent state depending on whether or not the transparent conductive layers 17, 17 are energized.

Therefore, the vehicle sunshade device A having the above structure is
By using it for automobile windows, it becomes possible to easily switch from an opaque state to a transparent state by switching the power from the power supply on and off, and the automobile window can be switched between a transparent state and an opaque state. it can.

Here, as shown in FIG. 6, an optical sensor S is installed outside the vehicle, and the controller C controls the voltage applied to the transparent conductive layer 17 based on the detection result of the optical sensor S. That is, the controller C controls the output of the power supply V that applies a voltage to the transparent conductive layer 17 to control the transparency of the vehicle window. Therefore, the transparency of the window of the vehicle can be automatically controlled according to the intensity of light outside the vehicle.

Further, in the vehicle sunshade device A, at a voltage of 0.1 to 5.0 kV / mm, at most several mA / m.
Since it can be driven with an extremely small current of ² , 10 W /
If there is an electric power of about m ^2, it can be sufficiently driven, and a power saving structure can be obtained. Furthermore, the transparent conductive layer 17,
Since the inorganic / organic composite particles 30 can be arranged at the same time when electricity is applied to 17, sufficient responsiveness can be obtained. Also, E
If the amount of transmitted light is controlled by the A fluid composition 16, the amount of transmitted light can be uniformly controlled in the entire wavelength range without absorbing light of a specific frequency, so there is no fear of heat generation due to light absorption. An awning device for a vehicle that does not waste energy can be provided.

Further, once the electric field is applied to orient the inorganic / organic composite particles 30 ..., The inorganic / organic composite particles 30.
··· maintains the state for a while even if the voltage is cut off, so the applied voltage becomes intermittently better, and energy-saving driving can be performed accordingly. In addition, the maintaining time of the alignment state of the inorganic / organic composite particles 30 in the absence of an electric field depends on
0 itself or an electrically insulating medium 19 in which it is dispersed
It can be appropriately adjusted according to the kinematic viscosity of. That is, if the kinematic viscosity of the electrically insulating medium 19 is lowered, the maintenance time can be shortened, and if the kinematic viscosity is increased, the maintenance time can be lengthened.

In the above-mentioned embodiment, the phenomenon in which the inorganic / organic composite particles 30 form a chain of one row and are arranged in parallel by the application of an electric field has been described. When the amount exceeds 1% by weight, the chain bodies 30 'are joined to each other in a plurality of rows instead of the chain bodies 30' in one row, and the columns C are arranged and arranged as shown in FIG.

In this column C, the left and right chains 3
Inorganic / organic composite particles 30 of 0'and 30 'are staggered one by one and adjacently staggered. With respect to this, the present inventors arranged the inorganic-organic composite particles, which are dielectrically polarized in the + pole portion and the − pole portion, alternately adjacent to each other and arranged so that the + pole portion and the − pole portion attract each other as shown in FIG. It is estimated that this is because it is more stable in terms of energy.

Therefore, when the content of the inorganic / organic composite particles 30 is large, a large number of columns C are formed between the electrodes, and the mechanism for increasing the amount of transmitted light acts by the generation of the columns C. . In this case, since a large amount of the inorganic / organic composite particles 30, ... Are collected in the plurality of columns C, the intervals between the adjacent columns C are widened, and the function of increasing the amount of transmitted light becomes remarkable.

By the way, the particle size of the inorganic / organic composite particles 30 is set in the range of 0.1 to 500 μm, preferably 5 to 200 μm as described above, because the inorganic / organic composite particles 30 of the present invention are This is due to the fact that it is a light scattering type particle or a light reflection type particle in terms of function. As is well known, the wavelength of visible light is 380 to 780 nm, that is, 0.38 to
Since it is 0.78 μm, in order to control the transmitted light by scattering or reflecting the light of this wavelength, the particle size of the inorganic / organic composite particles 30 is at least 0.1 μm or more, preferably 5 μm. It is necessary to do the above.

On the other hand, a particle size smaller than the wavelength of visible light which causes Brownian motion, for example, 5 nm to several 1
When dielectric ultrafine particles of about 0 nm (= 0.005 to 0.02 μm) are dispersed in the electrically insulating medium 19, it is possible that the ultrafine particles can be oriented by an electric field. The transmission mechanism is completely different from the above-mentioned example of the present invention, in which the ultrafine particles are dispersed to completely transmit light when no electric field is applied, and when the electric field is applied, the ultrafine particles are oriented to scatter and attenuate light, It is not preferable because it behaves completely differently.

Next, it can be considered the ultrafine particles TiBaO ₄ as an indication of dielectric in the nanoparticle, such as, TiBaO ₄ is a substance in the range of specific gravity 4-6, heavier, Even if the TiBaO ₄ particles are made to have a large particle size for the purpose of becoming a light-reflecting type, they will be gravitationally sedimented in the electrically insulating medium 19 due to the difference in specific gravity between the particles and the particles cannot be uniformly dispersed. Also, the T
In order to uniformly disperse the iBaO ₄ particles in the electrically insulating medium 19, an electrically insulating medium 19 having a large specific gravity is required, but an electrically insulating medium having a specific gravity of about 4 to 6 does not exist. On the other hand, the inorganic-organic composite particles 30 of the present invention
Since the specific gravity can be easily adjusted to about 1.2 as described above, it is possible to use various kinds of generally known electrically insulating media.

Next, from the viewpoint of colorability, it is difficult to color the ultrafine particles, and even if they can be colored, the particle size is too small.
The color of the ultrafine particles dispersed in No. 9 cannot be perceptibly developed. Therefore, when the ultrafine particles are used, only the color of the electrically insulating medium 19 can be exhibited, and only one coloring pattern can be realized. For example, only changes between red transparent and red opaque are feasible.

On the other hand, according to the present invention, when the medium is red transparent and the inorganic / organic composite particles are white, discoloration from cloudy opaque to red transparent can be realized, and the medium is colorless and transparent.
When the inorganic / organic composite particles are blue, blue opacity
A colorless and transparent discoloration can be realized, and when the medium is red and the inorganic / organic composite particles are blue, a violet opaque to red transparent discoloration can be realized, and when the medium is light blue and the particles are yellow, greenish opaque. ~ Light blue transparency can be realized. Further, even when looking at the portion to be colored, all of the core body 31, the surface layer 33, and the electrically insulating medium 19 of the inorganic / organic composite particles 30 can be colored, and coloring variations can be easily added. The surface of the core body 31 of the inorganic-organic composite particles 30 is covered with an inorganic substance, but since the color leaks from the gap between the inorganic substances, the color when the core body 31 is colored is effectively reflected in the color of the EA fluid. It

Further, the surface layer 33 of the inorganic / organic composite particles 30.
In order to color the above, the required number of colored inorganic pigments are mixed into the inorganic / organic composite particles used when manufacturing the inorganic / organic composite particles 30, and the mixture is uniformly mixed. The inorganic / organic composite particles 30 may be manufactured.
In the inorganic / organic composite particles 30 produced in this manner, for example, as shown in FIG. 9, a part of the inorganic / organic composite particles attached to the periphery of the core 31 is a colored inorganic pigment 3.
5, the structure has been replaced by. Thereby, the inorganic / organic composite particles can be colored.

According to such a vehicle awning device, which is a vehicle awning device for controlling the amount of sunlight entering a vehicle such as an automobile or a train, the two windows facing the window of the vehicle are provided. At least a part of the housing facing each other is provided with a transparent hollow body, and the EA fluid composition containing EA particles in an electrically insulating medium is housed in the housing, and the transparent portion of the housing is Since a transparent conductive layer is formed on one surface and a transparent conductive layer facing the transparent conductive layer on the one surface is formed on the other surface of the transparent portion of the container, energize the transparent conductive layer. Then, the transparent state of the container is maintained, and by deenergizing the transparent conductive layer, the container becomes opaque. Therefore, depending on the energized state of the transparent conductive layer, the housing forming the window of the vehicle can be made transparent or opaque, and the shade can be easily formed. Therefore, the conventional curtain, curtain rail, suspending tool, etc. are not required, the space of the vehicle can be maintained, the operation of moving the curtain is not required, and the shade can be easily formed.

Further, as compared with the case where the conventional light-shielding sheet is attached to the window of the vehicle, the storage body forming the window of the vehicle can be easily switched to the transparent state or the opaque state, and the sun can be adjusted according to the amount of sunlight. It can take in light. Then, the work of attaching and detaching the light shielding sheet is not required, and the housing forming the window of the vehicle can be easily switched to the transparent or opaque state by the energization state of the transparent conductive layer. In addition, in the present embodiment, the vehicle sunshade device is provided in the rear window of the automobile, but the present invention is not limited to this, and may be used in a window such as a sunroof of a vehicle, a side glass or the like into which sunlight is incident. .

Further, the vehicle awning device of the present invention has a simple structure and can be provided at a much lower cost than the conventional device using a liquid crystal in terms of manufacturing unit price. By the way, E explained earlier
The A fluid composition is considered to be 1/10 or less in raw material cost as compared with an ordinary liquid crystal material, and is extremely inexpensive. Also,
In the device using the liquid crystal, it is necessary to use various control circuits and LSI for driving the liquid crystal, but the vehicle sunshade device A according to the present invention has the simple structure as described above. Well, the electric circuit around the power supply can be configured with only the minimum switch and wiring.

(Second Embodiment) Next, a second embodiment of the vehicle awning device of the present invention will be described with reference to the drawings.
The second embodiment of this vehicle awning device differs from the first embodiment in the shape of the transparent conductive layer. That is, as shown in FIG. 10, one transparent conductive layer 17 ′ facing each other.
Is formed in such a shape as to cover the entire inside of the housing body 15, and the other transparent conductive layer 17 ″ includes a first comb-tooth portion 17 a arranged substantially over the entire housing body 15 and the first comb-tooth portion. The tooth 17a 'of the tooth 17a has a second comb tooth portion 17b into which the tooth 17b' is alternately inserted.
The entire inside of the storage body 15 is covered with 7a and the second comb tooth portion 17b. Teeth 1 of these first comb tooth portions 17a
7 a ′ and teeth 17 b ′ of the second comb tooth portion 17 b extend along the width direction of the housing body 15 and are alternately arranged along the longitudinal direction of the housing body 15.

The first comb tooth portion 17a is connected to one end of the switch S via the power source V. The other end of the switch S is switchably arranged between the one transparent conductive layer 17 'and the second comb tooth portion 17b. That is,
When this switch S is connected to the one transparent conductive layer 17 ', as shown in FIG. 4 or 7, the first comb tooth portion 17a is formed.
Inorganic / organic composite particles 30 are vertically oriented between the teeth 17a ′ of one side and one transparent conductive layer 17 ′, and the chain-like body 3
0'or column C is constructed. Therefore, the inorganic / organic composite particles 30 dispersed randomly in the container 15 are arranged in a specific direction to form the chain 30 'or the column C.
Since sunlight passes between them, the storage body 15 changes from an opaque state to a transparent state. Therefore, the storage body 15
The amount of sunlight that passes through can be increased.

Further, when the switch S is switched to connect to the second comb tooth portion 17b, as shown in FIG. 11, the tooth 17a 'of the first comb tooth portion 17a and the tooth 1 of the second comb tooth portion 17b.
7b ′ and the inorganic-organic composite particles 30 are oriented along the surface direction of the housing body 15 to form a planar body 30 ″. Therefore, sunlight incident from one surface of the housing body 15 It is considerably blocked by the sheet 30 ". Therefore, the storage body 15 transmits almost no sunlight, and the window of the vehicle is in a dark frosted glass state. By switching the switch S in this manner, the amount of sunlight entering the vehicle can be controlled easily and quickly.

Hereinafter, the effects of the present invention will be clarified by showing examples. "Production Example" A transparent conductive layer made of an ITO (Indium Tin Oxide) film is formed on the surface of a window glass of an automobile by using Figs.
As shown in FIG. 5, a transparent conductive layer for the display was formed and covered over almost the entire window glass. Two pieces of ITO glass having a thickness of 1.0 mm coated with this transparent conductive layer were prepared, and the two pieces of glass were placed in a state where the transparent conductive layers face each other.
The peripheral portions were sealed with a resin sealing member while facing each other in parallel at intervals of mm. Next, an injection hole is formed in a part of the seal member, and a liquid EA fluid composition is injected from here.
After the injection, the injection hole was closed to complete the transmitted light amount control device having the configuration shown in FIG.

The manufacturing process of the EA fluid composition used here will be described below. First, a mixture of titanium hydroxide (general name; hydrous titanium oxide, manufactured by Ishihara Sangyo Co., Ltd., C-II), butyl acrylate, 1,3-butylene glycol dimethacrylate, and a polymerization initiator is dispersed and stabilized with tricalcium phosphate. Disperse in water containing as an agent, 1 at 60 ℃
Suspension polymerization was carried out with stirring for an hour. The obtained product was filtered, washed with acid, further washed with water, and then dried to obtain inorganic / organic composite particles.

The inorganic / organic composite particles obtained above were agitated by a jet airflow using a jet airflow stirrer (Hybridizer manufactured by Nara Machinery Co., Ltd.) to obtain surface-polished inorganic / organic composite particles. The specific gravity of this thing is 1.1
57 and the average particle diameter was 13.7 μm. The inorganic / organic composite particles are uniformly dispersed in silicone oils of various kinematic viscosities (TSF451 series, manufactured by Toshiba Silicone Co., Ltd.) so that the content is various weight%. EA fluid compositions having a constant particle concentration and various particle concentrations and a silicone oil having a constant particle concentration and various kinematic viscosities as an electrically insulating medium were obtained.

The results of transmitted light control experiments conducted using the various EA fluid compositions are shown in the drawings. The experiment was carried out by detecting the intensity of light incident on the transparent housing and the intensity of light passing through the housing with an optical sensor, and comparing the results with each other and displaying the result in dBm as increased light. in this case,
An increase of 3.2 dBm means a 2.09 times increase in optical power, and an increase of 4.2 dBm means a 2.63 times increase in optical power.

FIG. 12 shows the results of measuring the increased light when the kinematic viscosity of the silicone oil (base oil) was 10 cSt and the inorganic / organic composite particle concentration and the applied electric field were used as parameters. Similarly, FIG. 13 shows the same test result when the kinematic viscosity of silicone oil is 50 cSt, and FIG. 14 shows the same test result when the kinematic viscosity of silicone oil is 100 cSt. From the results shown in FIGS. 12 to 14, 0.5 to 1
At an inorganic / organic composite particle concentration of 5% by weight, 0.2
The dBm value of the increased light increases as the applied electric field is increased in the range of 5 to 1.5 kV / mm. Therefore, it was demonstrated that the amount of transmitted light can be controlled by implementing the present invention. Next, when the concentration of the inorganic / organic composite particles is 1.0% by weight, the ratio of the increased light is small even when the applied electric field is 3 kV / mm. Therefore, it was found that it is preferable to set the concentration of the inorganic / organic composite particles to 2.5% by weight or more.

Next, FIG. 15 and FIG. 16 show the results of the test in which the increased light was measured with the kinematic viscosity of the silicone oil and the applied electric field as parameters when the inorganic / organic composite particle concentration was fixed at 5.0% by weight. In the same test, the test results when the inorganic / organic composite particle concentration is 7.5% by weight are shown. From the results shown in FIG. 15 and FIG. 16, it was found that the increase in the applied electric field in the range of 0.5 to 3 kV / mm increased the dBm value of the increased light in any kinematic viscosity silicone oil. . Therefore, it can be demonstrated that the amount of transmitted light can be controlled by carrying out the present invention, and it is found that the larger the applied electric field within the range of 0.25 to 1.5 kV / mm, the larger the increased light. did.

FIG. 17 shows the change rate of the energization time to the electrode and the amount of transmitted light when an EA fluid composition in which 7% by weight of inorganic / organic composite particles are dispersed in silicone oil having a kinematic viscosity of 10 cSt is used. It shows the relationship of. The amount of transmitted light is measured by applying light from a light source above a transparent glass container filled with the EA fluid composition, installing an optical sensor below the container, and analyzing the optical power received by this optical sensor. Is. As is clear from this figure, it is clear that the energization starts about 1 second after the start of the measurement, and at the same time, the amount of transmitted light begins to increase and the amount of transmitted light reaches its maximum and stabilizes in 3 to 4 seconds.

FIG. 18 shows the wavelength of transmitted light when the transmitted light amount is measured using an EA fluid composition in which 4% by weight of blue-colored inorganic / organic composite particles are added to silicone oil having a kinematic viscosity of 10 cSt. Show dependencies. The coloring of the inorganic / organic composite particles was performed by substituting 20% by weight of the EA inorganic material constituting the surface layer of the inorganic / organic composite particles with a blue pigment. In the figure, the curve indicated by E = 0 kV indicates the amount of transmitted light when there is no electric field, and the curve indicated by E = 2 kV indicates the amount of transmitted light when a potential of 2 kV is applied to the electrodes.

As is clear from the comparison of both curves in FIG. 18, the blue-based EA fluid composition that transmits a large amount of blue-based light having a short wavelength when there is no electric field emits a wide range of light over a wide wavelength range when an electric field is applied. It changed so that it was transmitted, and it is clear that it changed from blue to colorless and transparent.

FIG. 19 shows the measurement of the amount of transmitted light of only this electrically insulating medium (without inorganic / organic composite particles) using an electrically insulating medium of dimethyl silicone oil containing 0.1% by weight of a blue dye. This is for explaining the frequency dependence of the amount of transmitted light in the case of performing. The electrically insulating medium is a medium that looks pale blue to the naked eye. FIG.
In FIG. 9, as is clear by comparing the light source spectrum and the medium spectrum, it is clear that light is absorbed in a portion other than the spectrum showing blue of a short wavelength,
From this fact, it is clear that the electrical insulating medium is blue because the blue is largely transmitted through the electrical insulating medium.

FIG. 20 shows that dimethyl silicone oil containing 0.1% by weight of a blue dye was used as an electrically insulating medium, and 5% by weight of inorganic / organic composite particles colored in yellow was dispersed in the EA fluid. This is for explaining the frequency dependence of the amount of transmitted light when a composition is formed and the amount of transmitted light is measured using the composition. The means used for coloring the inorganic / organic composite particles is the same as in the above example, and a yellow pigment was used this time. FIG. 20 shows the light source spectrum and E = 0 kV
The transmitted light spectrum in the case of / mm and the transmitted light spectrum in the case of E = 1 kV / mm are respectively shown. From this figure,
It can be seen that what was opaque in yellow-green, which was a mixed color of blue and yellow when there was no electric field, changed to a blue transparent state, which was nearly colorless and transparent when an electric field was applied. Thus, it has been found that various variations of colors can be applied to the EA fluid composition and that the color can be changed to a transparent state of a different color, a transparent state of the same color, or a colorless transparent state.

FIG. 21 shows the wavelength dependence of the amount of transmitted light when the switch S is switched and connected and when it is not connected to the switch S. Here, in the figure, the amount of transmitted light was measured using an EA fluid composition obtained by adding 4% by weight of blue-colored inorganic / organic composite particles to a silicone oil having a kinematic viscosity of 10 cSt. The coloring of the inorganic / organic composite particles was performed by substituting 20% by weight of the EA inorganic material constituting the surface layer of the inorganic / organic composite particles with a blue pigment. In the figure, the curve indicated by E = 0 kV indicates the amount of transmitted light when there is no electric field, and the curve indicated by E = 2 kV indicates the amount of transmitted light when a potential of 2 kV is applied to the electrodes.

In the figure, E = 2 kV, and the upper curve in the figure is the amount of transmitted light when the first comb tooth portion 17a is connected to one transparent conductive layer 17 'via the switch S. Indicates. As is clear from this curve, the first comb tooth portion 1
Inorganic / organic composite particles are vertically aligned between the teeth 17a 'of 7a and one transparent conductive layer 17', and light in a wide range of wavelengths is transmitted. The curve located in the center of the figure shows a state in which the switch S is not connected, that is, a state in which there is no electric field, and the inorganic / organic composite particles are randomly suspended / dispersed. The lower curve in the figure indicates the first comb tooth portion 17a.
Shows the amount of transmitted light when is connected to the second comb tooth portion 17b via the switch S. As you can see from this curve,
The teeth 17a 'of the first comb tooth portion 17a and the second comb tooth portion 17b
As shown in FIG. 11, the inorganic-organic composite particles are oriented along the plane direction of the container between the tooth 17b ′ of the sheet body 3 and the tooth 17b ′.
It constitutes 0 "and blocks light of many wavelengths.

Next, Tables 1 and 2 show the increased light obtained when a silicone oil (base oil) having a kinematic viscosity of 50 cSt was used and the concentration of the inorganic / organic composite particles was 5.0% by weight. The results of investigation for each wavelength are shown below.

[0080]

[Table 1]

[0081]

[Table 2]

From the results shown in Tables 1 and 2, when the amount of transmitted light is controlled by using the vehicle shade device according to the present invention,
Uniform increased light was obtained in a wide wavelength range of 400 to 1100 nm, and it became clear that the present invention enables uniform adjustment of the amount of transmitted light in a wide wavelength range. The wavelength range of visible light is usually 480 to 780 nm.
Therefore, it has been clarified that the device of the present invention has a uniform transmitted light control performance in almost the entire wavelength range of visible light and in the infrared range having a longer wavelength.

[0083]

As described above, according to the present invention, it is possible to orient the solid particles by applying an electric field to the EA fluid composition contained in the container, whereby the transparent particles of the container are transmitted. Since the amount of light to be controlled can be controlled, a desired display can be obtained only by controlling the energization. That is, a hollow housing is provided in the vehicle window, and the EA is installed in this housing.
Since the fluid composition is housed and the transparent conductive layers are formed on the surfaces of the transparent parts facing each other of the housing, the vehicle window can be made transparent by energizing these transparent conductive layers. By de-energizing the conductive layer, the vehicle window can be made opaque. By making the window of the vehicle opaque, the amount of sunlight that enters the vehicle can be controlled, and the housing can be used as a shade for the window of the vehicle.

As described above, depending on the energized state of the transparent conductive layer,
The housing forming the window of the vehicle can be made transparent or opaque to easily form an awning. Therefore, the conventional curtain, curtain rail, suspending tool, etc. are not required, the space of the vehicle can be maintained, the operation of moving the curtain is not required, and the shade can be easily formed. In addition, compared to the conventional case where a light-shielding sheet is attached to the window of a vehicle, the storage body that forms the window of the vehicle can be easily switched to a transparent state or an opaque state, and the sunlight can be collected according to the amount of sunlight. Can be crowded. Then, the work of attaching and detaching the light shielding sheet is not required, and the housing forming the window of the vehicle can be easily switched to the transparent or opaque state by the energization state of the transparent conductive layer.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a vehicle awning device according to the present invention.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is an explanatory diagram showing a dispersed state of inorganic / organic composite particles in a non-energized state with respect to the transparent conductive layer of the vehicle shade device shown in FIG. 1.

FIG. 4 is an explanatory diagram showing an alignment state of inorganic / organic composite particles in a state where electricity is applied to a transparent conductive layer of the transmitted light amount control device shown in FIG. 1.

FIG. 5 is a cross-sectional view showing an example of the inorganic / organic composite particles used in the present invention.

FIG. 6 is a configuration diagram for explaining a control mechanism of the vehicle awning device of the present invention.

FIG. 7 is an explanatory diagram showing a state in which a chain body constitutes a column.

8 is an explanatory diagram showing the dielectric polarization of the inorganic-organic composite particles shown in FIG.

FIG. 9 is an explanatory diagram showing a colored state of the inorganic / organic composite particles.

FIG. 10 is a development view showing a transparent conductive layer in a second embodiment of the vehicle awning device of the present invention.

11 is a diagram illustrating a state in which the first comb tooth portion and the second comb tooth portion of FIG. 10 are connected.

FIG. 12 is a diagram showing the light transmittance in the case of using an electrically insulating medium having a kinematic viscosity of 10 cSt in the apparatus of the example, using the particle concentration and the applied voltage as parameters.

FIG. 13 is a diagram showing the light transmittance when an electrically insulating medium having a kinematic viscosity of 50 cSt is used in the apparatus of the example, with the particle concentration and the applied voltage as parameters.

FIG. 14 is a diagram showing the light transmittance in the case of using an electrically insulating medium having a kinematic viscosity of 100 cSt in the apparatus of the example, using the particle concentration and the applied voltage as parameters.

FIG. 15 is a diagram showing the light transmittance when inorganic / organic composite particles having a particle concentration of 5.0% by weight are used in the apparatus of the embodiment, with applied voltage and kinematic viscosity of the electrically insulating medium as parameters. .

FIG. 16 is a diagram showing the light transmittance when inorganic / organic composite particles having a particle concentration of 7.5% by weight are used in the apparatus of the example, with applied voltage and kinematic viscosity of the electrically insulating medium as parameters. .

FIG. 17 shows a kinematic viscosity of 10 cSt in the apparatus of the example.
FIG. 3 is a diagram showing the relationship between the time of energizing the electrodes and the rate of change in the amount of transmitted light using the EA fluid composition in which 7% by weight of the inorganic / organic composite particles are dispersed in the silicone oil of FIG.

FIG. 18 shows a kinematic viscosity of 10 cSt in the apparatus of the example.
FIG. 3 is a graph showing the wavelength dependence of the amount of transmitted light when the amount of transmitted light is measured using the EA fluid composition in which 4% by weight of the inorganic-organic composite particles colored blue is added to the silicone oil.

FIG. 19 shows a blue dye of 0.
It is an explanatory view explaining the frequency dependence of the amount of transmitted light when the amount of transmitted light of only this is used, using the electrically insulating medium of dimethyl silicone oil added 1% by weight.

FIG. 20: In the device of the example, a blue dye is added to
1% by weight of dimethyl silicone oil was used as an electrically insulating medium, and 5% by weight of yellow-colored inorganic / organic composite particles were dispersed therein to form an EA fluid composition, which was used to measure the amount of transmitted light. It is a figure explaining the frequency dependence of the transmitted light amount at the time of performing.

FIG. 21 shows a kinematic viscosity of 10 cSt in the apparatus of the example.
FIG. 3 is a graph showing the wavelength dependence of the amount of transmitted light when the amount of transmitted light is measured using the EA fluid composition in which 4% by weight of the inorganic-organic composite particles colored blue is added to the silicone oil.

[Explanation of symbols]

15 ... Transparent substrate, 16 ... EA fluid composition (electrosensitive optical functional fluid composition), 17 ... Transparent conductive layer, 17 '...
One transparent conductive layer, 17 ″ ... The other transparent conductive layer, 17a
... first comb tooth portion, 17a '... teeth, 17b ... second comb tooth portion, 17b' ... teeth, 18 ... accommodating body, 19 ... electrically insulating medium, 30 ... inorganic / organic Composite particles, 31 ... Core body.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuya Edamura 2-6-15 Shiba Park, Minato-ku, Tokyo Inside Fujikura Kasei Co., Ltd. (72) Inventor Yasufumi Otsubo 9-chome Konakadai, Inage-ku, Chiba-shi, Chiba 21-1 206

Claims (4)

[Claims] 1. A vehicle awning device for controlling the amount of sunlight entering a vehicle such as an automobile or a train, wherein at least a part of two facing surfaces is transparent to a window of the vehicle. A hollow container provided with the electrosensitivity type optical functional fluid composition containing the electric field arranging particles in an electrically insulating medium. An awning device for a vehicle, wherein a transparent conductive layer is formed on a surface, and a transparent conductive layer facing the transparent conductive layer on the one surface is formed on the other surface of the transparent portion of the housing. 2. One of the transparent conductive layers is formed in a planar shape that covers almost the entire transparent portion of the container, and the other of the transparent conductive layers is disposed on almost the entire transparent portion of the container. Between the first comb tooth portion and the tooth of the first comb tooth portion,
The vehicle sunshade device according to claim 1, wherein the teeth are formed on the second comb tooth portions which are alternately inserted. 3. The electric field aligning particles are inorganic / organic composite particles formed by a core body made of an organic polymer compound and a surface layer containing an inorganic substance having an electric field aligning effect. The sunshade device for vehicles as described in any one of 1-2. 4. The vehicle awning device according to claim 1, wherein at least one of the surface layer, the core body, and the electrically insulating medium contains a pigment. .