JP7200648B2 - decorative panel - Google Patents

Description

The present invention relates to decorative panels.

2. Description of the Related Art Conventionally, as a decorative panel, the one described in Patent Document 1 is known. Specifically, in Patent Document 1, a decorative panel 40 having a light emitting portion 41 that is excited by ultraviolet light and emits light by fluorescence, an ultraviolet light LED 31 that can irradiate the decorative panel 40 with ultraviolet light, A visible light LED 32 capable of irradiating visible light to the decorative panel 40 is provided, and the decorative panel 40 is irradiated with ultraviolet light from the ultraviolet light LED 31 and visible light from the visible light LED 32. , a lighting device 30 is disclosed in which ultraviolet light and at least a part of visible light are emitted from a light emitting unit 41 toward the interior of the vehicle.

JP 2017-95046 A

However, in the configuration disclosed in Patent Literature 1, since the position (member) emitting light does not change, design variations are limited. Therefore, for example, if the light can be dimmed in stages or the design can be changed depending on the time or situation, the variation of the design will increase. On the other hand, when trying to save the space of the decorative panel, it may be necessary to reduce the thickness of the decorative panel.

The present invention has been completed based on the above circumstances, and one of the objects thereof is to provide a decorative panel with a wide variety of designs. Another object of the present invention is to provide a decorative panel with improved stereoscopic effect and depth effect.

The present invention
A decorative panel as an interior material for a vehicle,
a plate-like inner panel portion that can transmit light;
a plate-shaped outer panel portion arranged to face the vehicle interior side of the inner panel portion;
a light modulating member configured to be capable of changing its own transmittance and reflectance with respect to light transmitted through the inner panel portion;
At least one of the inner panel portion and the outer panel portion is attached with the light control member.

According to such a decorative panel, by changing the transmittance and reflectance of the light control member, the light emitted from the decorative panel to the interior of the vehicle can be changed in a plurality of patterns. For example, by changing the transmittance of the light control member, the light taken in between the inner panel portion and the outer panel portion can be adjusted, and by changing the reflectance of the light control member, the position where light is reflected (inner panel (part side or outside panel part side) can be adjusted. Then, the light can be adjusted (gradated) so that the light becomes brighter (or darker) in stages, and the appearance can be changed during the day and night or in an emergency. That is, the design can be changed according to time and circumstances.

In the above configuration,
The light control member may be attached to the inner panel portion and the outer panel portion at positions overlapping each other in the vehicle interior and exterior directions.

According to such a decorative panel, it is possible to change the transmittance and the reflectance of the light control member that is attached in an overlapping manner. Therefore, the light transmitted through the inner panel portion can be arbitrarily reflected on the inner panel portion side or the outer panel portion side, and the light transmitted through the inner panel portion can be reflected between the inner panel portion and the outer panel portion. It can be reflected multiple times. As a result, it is possible to realize an illumination mode that is three-dimensional and has a sense of depth.

Also, in the above configuration,
Having a reflecting member that reflects light passing through the inner panel portion,
The reflecting member and the light control member may be alternately attached to the outer panel portion in the plate surface direction.

According to such a decorative panel, even when the reflectance of the light control member is lowered, the light passing through the inner panel portion can be reflected by the reflecting member. As a result, even with a decorative panel having a relatively small thickness, it is possible to realize a three-dimensional lighting mode with a sense of depth. In addition, since the reflective member and the light control member are alternately attached to the outer panel portion in the plate surface direction, it is possible to increase the variation of patterns that can be produced by the decorative panel.

Also, in the above configuration,
Having a reflecting member that reflects light passing through the inner panel portion,
The light control member is attached to the inner panel portion,
The reflecting member may be attached to the outer panel portion.

According to such a decorative panel, when the light control member attached to the inner panel portion has a high transmittance and a low reflectance, the light transmitted through the inner panel portion is directed into the vehicle interior by the reflecting member. When the transmittance is low and the reflectance is high, the light passing through the inner panel portion can be reflected into the vehicle interior by the light control member. As a result, it is possible to realize a three-dimensional lighting mode with a sense of depth simply by changing the transmittance and reflectance of the light control member attached to the inner panel portion.

Also, in the above configuration,
The light control member is
a dimming pole;
a counter electrode arranged to face the dimming electrode;
a silver plating bath having a liquid electrolyte containing at least silver ions, wherein the dimming electrode and the counter electrode are in contact;
By reversible formation and elution of a silver coating on the light modulating electrode by energization, it is possible to change its own transmittance and reflectance.

According to such a configuration, a practical vehicle interior material (decorative panel ) can be provided.

According to the present invention, it is possible to provide decorative panels with a wide variety of designs. In addition, it is possible to provide a decorative panel with improved stereoscopic effect and depth effect.

The figure which looked at the interior front side part of the vehicle which concerns on Embodiment 1 from the vehicle interior side. View showing the decorative panel installed on the right door trim Cross-sectional view of the right decorative panel (cross-section along line III-III in FIG. 2) Explanatory drawing showing a light control member Sectional view of the decorative panel on the right side of the vehicle according to Embodiment 2 Sectional view of the decorative panel on the right side of the vehicle according to Embodiment 3 Sectional view of the decorative panel on the right side of the vehicle according to Modification 1 Sectional view of a decorative panel on the right side of a vehicle according to modification 2

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 4. FIG. In this embodiment, a decorative panel 10 as an interior material for a vehicle (vehicle) 1 will be described. The arrow direction L is left, the arrow direction R is right, the arrow direction FR is forward, the arrow direction RR is backward, the arrow direction UP is upward, the arrow direction DW is downward, and the arrow direction IN is inside the vehicle. Explanation will be given assuming that OUT is the outside of the vehicle.

As shown in FIG. 1, a vehicle 1 has an instrument panel 2 having a steering wheel 7 on the driver's seat side (right side) and a glove box 8 on the passenger's seat side (left side), and left and right door panels. Interior materials such as door trims 3, 3 attached from the inside of the passenger compartment and seats (driver's seat and front passenger's seat) 4, 4 on which passengers are seated are provided. Although each member of the right door trim 3 will be described below, it is assumed that each member of the left door trim 3 has the same configuration.

A door inside handle 5 for opening and closing the door from the inside of the vehicle interior, a speaker grill 6 for protecting the speaker, a decorative panel 10 for improving the design of the vehicle interior, and the like are attached to the right door trim 3. ing. As shown in FIGS. 1 and 2, the decorative panel 10 is a long plate-shaped member extending in the longitudinal direction of the vehicle, and has a shape that curves toward the interior of the vehicle toward the front of the vehicle.

As shown in FIG. 2, the decorative panel 10 includes a display portion 11 extending forward to display a predetermined image, and a display portion 11 extending behind the display portion 11 to be decorated by transmitting or reflecting light. and a decoration part 12 . The display unit 11 is a so-called rear projection type display device, and can be used as an electronic side mirror by projecting a field of view behind the vehicle 1 (see FIG. 1).

As shown in FIGS. 2 and 3, the decorative portion 12 has a top portion 13 extending in the vehicle front-rear direction at the center in the vertical direction. The decorative portion 12 has a shape that bulges toward the interior of the vehicle from the upper and lower portions 14 and 15 toward the top portion 13 . The decorating portion 12 is a double layer composed of a plate-shaped inner panel portion 16 capable of transmitting light and a plate-shaped outer panel portion 17 arranged to face the inner panel portion 16 on the outside of the vehicle. It is a housing member that has a structure and includes a light control member 20 and a reflecting member 30, which will be described later.

Inside the inner panel portion 16, a plurality of mountain-shaped peaks on the outside of the passenger compartment and a plurality of valleys on the inside of the passenger compartment are alternately arranged in the vertical direction. As a result, the light passing through the inner panel portion 16 is diffusely reflected, and the design of the decoration portion 12 can be improved. As the material of the inner panel portion 16, for example, a transparent resin panel made of acrylic resin, styrene resin, polyester resin, polypropylene resin, PET resin, or the like can be used.

The decorative portion 12 is attached to the inner surface of the inner panel portion 16 (the surface facing the vehicle interior side) and the inner surface of the outer panel portion 17 (the surface facing the vehicle interior) so as to face each other (vehicle It has a plurality of light control members 20 attached at overlapping positions in the indoor/outdoor direction, and a plurality of reflecting members 30 attached to the inner surface of the outer panel portion 17 . A light control member 20 is attached over the entire inner surface of the inner panel portion 16 . On the other hand, on the inner surface of the outer panel portion 17, a plurality of light controlling members 20 and a plurality of reflecting members 30 are alternately attached at predetermined intervals in the plate surface direction. The light control member 20 and the reflecting member 30 form a plurality of stripes curved toward the interior of the vehicle toward the front of the vehicle so as to follow the shape of the decorative panel 10 when viewed from the interior of the vehicle ( See Figure 2).

The light control member 20 is configured to be able to change its own transmittance and reflectance with respect to the light passing through the inner panel section 16 (details will be described later). The plurality of reflecting members 30 are formed by, for example, depositing (pasting) a metal film of silver, aluminum, or the like, and are configured to be able to reflect light passing through the inner panel section 16 .

Next, the light control member 20 will be described with reference to FIG. 4 . It should be noted that descriptions using "-" for numerical ranges include lower and upper limits unless otherwise specified. For example, the description “10 to 20” includes both the lower limit “10” and the upper limit “20”.

The light control member 20 includes a light control pole 21, a counter electrode 22 arranged to face the light control pole 21, and a sealing member 24 for connecting and sealing both ends of the light control pole 21 and the counter pole 22. 24 and. The light control member 20 also includes a light control electrode 21 , a counter electrode 22 , and a silver plating bath portion 23 surrounded by seal members 24 , 24 . The silver plating bath 23 is filled with a liquid electrolyte containing an ionic liquid, an organic solvent, silver ions, and citric acid. The inner sides of the dimming electrode 21 and the counter electrode 22 are in contact with the electrolyte of the silver plating bath 23 . The light modulating member 20 is configured to change its own transmittance and reflectance by reversible formation and elution of a silver film on the light modulating pole 21 by energization.

As the dimming pole 21, for example, a transparent conductive film such as tin-doped indium oxide (ITO) or fluorine-doped tin oxide (FTO) formed on a transparent substrate such as inorganic glass or resin glass can be adopted. can. Palladium nanoparticles may be adhered to the surface of the transparent electrode. This is because a high reflectance can be obtained when the silver film is formed on the light modulating electrode 21 . As the counter electrode 22, an electrode made of silver, ITO, FTO, or the like can be used.

An ionic liquid is an ionic substance that is in a liquid state at room temperature (25° C.) and is composed of a cation portion and an anion portion. The cation moiety of the ionic liquid can be selected from, for example, the group consisting of onium cations of 5- to 6-membered ring compounds having 1 to 3 nitrogen atoms, quaternary ammonium cations, and quaternary phosphonium cations. Examples of onium cations of 5- to 6-membered ring compounds having 1 to 3 nitrogen atoms include 5-membered ring compounds such as imidazolium cations and pyrrolidinium cations, and 6-membered ring compounds such as pyridinium cations and piperidinium cations. can be adopted. Among these, imidazolium cations are preferred. This is because imidazolium cations have a low melting point and tend to be liquid.

〔式（１）中、Ｒ^１、Ｒ^２、Ｒ^３、Ｒ^４、Ｒ^５は、それぞれ独立して、
水素原子、
置換されているかもしくは非置換の炭素数１～２０の飽和もしくは不飽和の直鎖状、分枝状、もしくは環状のアルキル基、
置換されているかもしくは非置換の炭素数６～３０のアリール基、
置換されているかもしくは非置換の炭素数７～３１のアリールアルキル基、又は
炭素数１～２０のアルコキシ基であり、
前記アルキル基、前記アリール基又は前記アリールアルキル基が置換されている場合は、ハロゲン原子、アルキル基、アリール基、アルコキシ基、アリールオキシ基、アルコキシカルボニル基、アシルオキシ基、アシル基、アルキルスルファニル基、アリールスルファニル基、アルキルアミノ基、ジアルキルアミノ基、アリールアミノ基、ヒドロキシ基、カルボキシ基、ホルミル基、メルカプト基、スルホ基、メシル基、ｐ－トルエンスルホニル基、アミノ基、ニトロ基、シアノ基、トリフルオロメチル基、トリクロロメチル基、トリメチルシリル基、ホスフィニコ基、又はホスホノ基で置換されている。〕 As the imidazolium cation, for example, one having the structure of the following general formula (1) can be employed.

[In formula (1), R ¹ , R ² , R ³ , R ⁴ and R ⁵ each independently
hydrogen atom,
a substituted or unsubstituted saturated or unsaturated linear, branched or cyclic alkyl group having 1 to 20 carbon atoms;
a substituted or unsubstituted aryl group having 6 to 30 carbon atoms,
a substituted or unsubstituted arylalkyl group having 7 to 31 carbon atoms, or an alkoxy group having 1 to 20 carbon atoms,
When the alkyl group, the aryl group or the arylalkyl group is substituted, a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkoxycarbonyl group, an acyloxy group, an acyl group, an alkylsulfanyl group, arylsulfanyl group, alkylamino group, dialkylamino group, arylamino group, hydroxy group, carboxy group, formyl group, mercapto group, sulfo group, mesyl group, p-toluenesulfonyl group, amino group, nitro group, cyano group, tri substituted with a fluoromethyl group, a trichloromethyl group, a trimethylsilyl group, a phosphinico group, or a phosphono group; ]

Substituted or unsubstituted saturated or unsaturated straight-chain, branched, and having 1 to 20 carbon atoms used as R ¹ , R ² , R ³ , R ⁴ and R ⁵ in the chemical formula (1), Alternatively, the cyclic alkyl group includes a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, n-pentyl group, isoamyl group, tert- pentyl group, neopentyl group, n-hexyl group, 3-methylpentan-2-yl group, 3-methylpentan-3-yl group, 4-methylpentyl group, 4-methylpentan-2-yl group, 1, 3-dimethylbutyl group, 3,3-dimethylbutyl group, 3,3-dimethylbutan-2-yl group, n-heptyl group, 1-methylhexyl group, 3-methylhexyl group, 4-methylhexyl group, 5 -methylhexyl group, 1-ethylpentyl group, 1-(n-propyl)butyl group, 1,1-dimethylpentyl group, 1,4-dimethylpentyl group, 1,1-diethylpropyl group, 1,3,3 -trimethylbutyl group, 1-ethyl-2,2-dimethylpropyl group, n-octyl group, 2-methylhexan-2-yl group, 2,4-dimethylpentan-3-yl group, 1,1-dimethylpentane -1-yl group, 2,2-dimethylhexan-3-yl group, 2,3-dimethylhexan-2-yl group, 2,5-dimethylhexan-2-yl group, 2,5-dimethylhexane-3 -yl group, 3,4-dimethylhexan-3-yl group, 3,5-dimethylhexan-3-yl group, 1-methylheptyl group, 2-methylheptyl group, 5-methylheptyl group, 2-methylheptane -2-yl group, 3-methylheptan-3-yl group, 4-methylheptan-3-yl group, 4-methylheptan-4-yl group, 1-ethylhexyl group, 2-ethylhexyl group, 1-propylpentyl group, 2-propylpentyl group, 1,1-dimethylhexyl group, 1,4-dimethylhexyl group, 1,5-dimethylhexyl group, 1-ethyl-1-methylpentyl group, 1-ethyl-4-methylpentyl group, 1,1,4-trimethylpentyl group, 2,4,4-trimethylpentyl group, 1-isopropyl-1,2-dimethylpropyl group, 1,1,3,3-tetramethylbutyl group, n-nonyl group, 1-methyloctyl group, 6-methyloctyl group, 1-ethylheptyl group, 1-(n-butyl)pentyl group, 4-methyl-1-(n-propyl) nthyl group, 1,5,5-trimethylhexyl group, 1,1,5-trimethylhexyl group, 2-methyloctan-3-yl group, n-decyl group, 1-methylnonyl group, 1-ethyloctyl group, 1 -(n-butyl)hexyl group, 1,1-dimethyloctyl group, 3,7-dimethyloctyl group, n-undecyl group, 1-methyldecyl group, 1-ethylnonyl group, n-dodecyl group, n-tridecyl group, n-tetradecyl group, 1-methyltridecyl group, n-pentadecyl group, n-hexadecyl group, n-heptadecyl group, n-octadecyl group, n-nonadecyl group, n-eicosyl group, cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, cyclooctyl group and the like can be employed. From the viewpoint of availability, a substituted or unsubstituted, saturated or unsaturated, linear or branched alkyl group having 1 to 8 carbon atoms is preferable, and a methyl group and an ethyl group are more preferable.

Examples of substituted or unsubstituted aryl groups having 6 to 30 carbon atoms used as R ¹ , R ² , R ³ , R ⁴ and R ⁵ in chemical formula (1) include phenyl group, biphenyl group, 1- naphthyl group, 2-naphthyl group, 9-anthryl group, 9-phenanthryl group, 1-pyrenyl group, 5-naphthacenyl group, 1-indenyl group, 2-azulenyl group, 9-fluorenyl group, terphenyl group, quarterphenyl group , mesityl group, pentalenyl group, binaphthalenyl group, ternaphthalenyl group, quarternaphthalenyl group, heptalenyl group, biphenylenyl group, indacenyl group, fluoranthenyl group, acenaphthylenyl group, acanthrilenyl group, phenalenyl group, fluorenyl group, anthryl group, bianthracenyl group, teranthracenyl group, quarteranthracenyl group, anthraquinolyl group, phenanthryl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, preadenyl group, picenyl group, perylenyl group, pentaphenyl group, pentacenyl group, A tetraphenylenyl group, a hexaphenyl group, a hexacenyl group, a rubicenyl group, a coronenyl group, a trinaphthylenyl group, a heptaphenyl group, a heptacenyl group, a pyrantrenyl group, an ovalenyl group, and the like can be employed.

Examples of substituted or unsubstituted arylalkyl groups having 7 to 31 carbon atoms used as R ¹ , R ² , R ³ , R ⁴ and R ⁵ in chemical formula (1) include benzyl group, phenylethyl group, 3-phenylpropyl group, 1-naphthylmethyl group, 2-naphthylmethyl group, 2-(1-naphthyl)ethyl group, 2-(2-naphthyl)ethyl group, 3-(1-naphthyl)propyl group, or 3 -(2-naphthyl)propyl group and the like can be employed.

Examples of the alkoxy group having 1 to 20 carbon atoms used as R ¹ , R ² , R ³ , R ⁴ and R ⁵ in the chemical formula (1) include methoxy group, ethoxy group, n-propoxy group, i-propoxy group, n-butoxy group, 2-methylpropoxy group, 1-methylpropoxy group, t-butoxy group and the like can be employed. Among these, those having 1 to 4 carbon atoms are preferred.

The aforementioned substituted or unsubstituted C1-C20 saturated or unsaturated linear, branched or cyclic alkyl group, substituted or unsubstituted C6-C30 aryl Hydrogen atoms in groups, substituted or unsubstituted arylalkyl groups, and alkylene groups may be further substituted with other substituents.

Examples of such substituents include halogen atoms such as fluorine atom, chlorine atom, bromine atom and iodine atom, alkyl groups such as methyl group, ethyl group, tert-butyl group and dodecyl group, phenyl group, p-tolyl group, Aryl groups such as xylyl group, cumenyl group, naphthyl group, anthryl group and phenanthryl group; alkoxy groups such as methoxy group, ethoxy group and tert-butoxy group; aryloxy groups such as phenoxy group and p-tolyloxy group; , butoxycarbonyl group, phenoxycarbonyl group and other alkoxycarbonyl groups, acetoxy group, propionyloxy group, benzoyloxy group and other acyloxy groups, acetyl group, benzoyl group, isobutyryl group, acryloyl group, methacryloyl group, methoxalyl group and other acyl groups , methylsulfanyl group, alkylsulfanyl group such as tert-butylsulfanyl group, phenylsulfanyl group, arylsulfanyl group such as p-tolylsulfanyl group, methylamino group, alkylamino group such as cyclohexylamino group, dimethylamino group, diethylamino group , morpholino group, dialkylamino group such as piperidino group, phenylamino group, arylamino group such as p-tolylamino group, etc., hydroxy group, carboxy group, formyl group, mercapto group, sulfo group, mesyl group, p-toluene A sulfonyl group, an amino group, a nitro group, a cyano group, a trifluoromethyl group, a trichloromethyl group, a trimethylsilyl group, a phosphinico group, a phosphono group and the like can be employed.

As the imidazolium cation represented by the above chemical formula (1), 1,3-disubstituted imidazolium cations and 1,2,3-trisubstituted imidazolium cations are preferably used from the viewpoint of ease of synthesis. A 3-disubstituted imidazolium cation is more preferably used. For example, imidazolium cations include 1-ethyl-3-methylimidazolium cation, 1,3-dimethylimidazolium cation, 1-methyl-3-propylimidazolium cation, 1-butyl-3-methylimidazolium cation, 1-methyl-3-pentylimidazolium cation, 1-hexyl-3-methylimidazolium cation, 1-heptyl-3-methylimidazolium cation, 1-methyl-3-octylimidazolium cation, 1-decyl-3- dialkylimidazolium cations such as methylimidazolium cation, 1-dodecyl-3-methylimidazolium cation, 1-ethyl-3-propylimidazolium cation, 1-butyl-3-ethylimidazolium cation; 3-ethyl-1, 2-dimethyl-imidazolium cation, 1,2-dimethyl-3-propylimidazolium cation, 1-butyl-2,3-dimethylimidazolium cation, 1,2-dimethyl-3-hexylimidazolium cation, 1,2 -Dimethyl-3-octylimidazolium cation, 1-ethyl-3,4-dimethylimidazolium cation, 1-isopropyl-2,3-dimethylimidazolium cation, and other trialkylimidazolium cations can be employed.

Examples of pyrrolidinium cations include N,N-dimethylpyrrolidinium cations, N-ethyl-N-methylpyrrolidinium cations, N-methyl-N-propylpyrrolidinium cations, N-butyl-N-methylpyrrolidinium cations. cation, N-methyl-N-pentylpyrrolidinium cation, N-hexyl-N-methylpyrrolidinium cation, N-methyl-N-octylpyrrolidinium cation, N-decyl-N-methylpyrrolidinium cation , N-dodecyl-N-methylpyrrolidinium cation, N-(2-methoxyethyl)-N-methylpyrrolidinium cation, N-(2-ethoxyethyl)-N-methylpyrrolidinium cation, N-( 2-propoxyethyl)-N-methylpyrrolidinium cation, N-(2-isopropoxyethyl)-N-methylpyrrolidinium cation, and the like can be employed.

As the pyridinium cation, a pyridinium cation substituted with an alkyl group having 1 to 16 carbon atoms such as N-methylpyridinium cation, N-ethylpyridinium cation, N-butylpyridinium cation, N-propylpyridinium cation, etc. can be employed. can.

Piperidinium cations include N,N-dimethylpiperidinium cation, N-ethyl-N-methylpiperidinium cation, N-methyl-N-propylpiperidinium cation, N-butyl-N-methylpiperidinium cation, cation, N-methyl-N-pentylpiperidinium cation, N-hexyl-N-methylpiperidinium cation, N-methyl-N-octylpiperidinium cation, N-decyl-N-methylpiperidinium cation , N-dodecyl-N-methylpiperidinium cation, N-(2-methoxyethyl)-N-methylpiperidinium cation, N-(2-methoxyethyl)-N-ethylpiperidinium cation, N-( 2-ethoxyethyl)-N-methylpiperidinium cation, N-methyl-N-(2-methoxyphenyl)piperidinium cation, N-methyl-N-(4-methoxyphenyl)piperidinium cation, N- Ethyl-N-(2-methoxyphenyl)piperidinium cation, N-ethyl-N-(4-methoxyphenyl)piperidinium cation, and the like can be employed.

The anion portion of the ionic liquid includes Cl ⁻ , Br ⁻ , AlCl ₄ ⁻ , Al ₂ Cl ₇ ⁻ , BF ₄ ⁻ , PF ₆ ⁻ , ClO ₄ ⁻ , NO ₃ ⁻ , CH ₃ COO ⁻ , CF ₃ COO ⁻ , CH ₃ SO ₃ ⁻ , CF ₃ SO ₃ ⁻ , (CF ₃ SO ₂ ) ₂ N ⁻ , (CF ₃ SO ₂ ) ₃ C ⁻ , AsF ₆ ⁻ , SbF ₆ ⁻ , NbF ₆ ⁻ , TaF ₆ ⁻ , F( HF)n ⁻ , (CN) ₂ N ⁻ , SCN ⁻ , C ₄ F ₉ SO ₃ ⁻ , (C ₂ F ₅ SO ₂ ) ₂ N ⁻ , C ₃ F ₇ COO ⁻ , (CF ₃ SO ₂ )(CF Anions such as ₃ CO)N ^- can be employed. Among these, anions having a halogen atom are preferred, fluorine atom-containing anions are more preferred, and fluorine-containing imide anions are even more preferred.

A polar solvent is preferably used as the organic solvent. This is because it easily dissolves citric acid. Polar solvents include, for example, acetonitrile, ethanol, isopropanol, N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), N,N-dimethylacetamide, tetrahydrofuran (THF), methyl triglycol diester succinate, acetone, Acetic acid and the like can be employed, and one of these can be used alone or two or more of them can be used in combination.

The volume ratio of the ionic liquid and the organic solvent is preferably from 90:10 to 10:90, more preferably from 60:40 to 40:60, even more preferably from 55:45 to 45:55. This is because citric acid can be sufficiently dissolved in the electrolyte when the volume ratio of the ionic liquid and the organic solvent is within the above range.

Silver nitrate, silver sulfate, or the like can be used as the silver ion source. The concentration of silver ions in the electrolyte is preferably 0.01-2.0M, more preferably 0.02-0.8M, even more preferably 0.1-0.3M. This is because adjusting the concentration of silver ions within the above range ensures a sufficient amount of electric current that can be passed through the electrolyte for reversible formation and elution of the silver film.

By including citric acid in the electrolyte, reversible formation and elution of the silver film on the light control electrode 21 by energization becomes possible. In addition, it is presumed that by including citric acid in the electrolyte, silver crystals grow in a planar shape, and the silver film formed on the light control electrode 21 can exhibit a beautiful specular gloss. The concentration of citric acid (citric acid monohydrate) is preferably 0.5 to 1000 mM, more preferably 5 to 250 mM, even more preferably 20 to 100 mM. This is because the silver film can be sufficiently formed and eluted, and the transmittance and reflectance of the light control member 20 can be suitably changed.

When the light control electrode 21 is connected to the power supply 25 so that the negative electrode and the counter electrode 22 are positive, the silver ions in the electrolyte are reduced and a silver film is formed on the light control electrode 21 . As a result, the light control member 20 has a lower transmittance and a higher reflectance. On the other hand, when the light control electrode 21 is connected to the power source 25 and energized so that the light control electrode 21 becomes the positive electrode and the counter electrode 22 becomes the negative electrode, the silver film formed on the light control electrode 21 is oxidized and eluted into the electrolyte as silver ions. do. This increases the transmittance of the light modulating member 20 and decreases the reflectance.

Next, the effects of this embodiment will be described. In this embodiment, the decorative panel 10 as an interior material for a vehicle includes a plate-shaped inner panel portion 16 capable of transmitting light, and a plate-shaped outer side facing the interior side of the inner panel portion 16. It has a panel section 17 and a light control member 20 configured to be able to change its own transmittance and reflectance with respect to light passing through the inner panel section 16, and at least the inner panel section 16 and the outer side. A light control member 20 is attached to one of the panel portions 17 .

According to such a decorative panel 10, by changing the transmittance and reflectance of the light control member 20, the light emitted from the decorative panel 10 to the interior of the vehicle can be changed in a plurality of patterns. For example, by changing the transmittance of the light control member 20, the light taken between the inner panel portion 16 and the outer panel portion 17 can be adjusted, and by changing the reflectance of the light control member 20, the light is reflected. The position (either the inner panel section 16 side or the outer panel section 17 side) can be adjusted. Then, the light can be adjusted (gradated) so that the light becomes brighter (or darker) in stages, and the appearance can be changed during the day and night or in an emergency. That is, the design can be changed according to time and circumstances.

Further, in the present embodiment, the light control member 20 is attached to the inner panel portion 16 and the outer panel portion 17 at positions overlapping each other in the vehicle interior and exterior directions.

According to such a decorative panel 10, it is possible to change the transmittance and the reflectance of the light control member 20 which is laminated in an overlapping manner. Therefore, the light transmitted through the inner panel portion 16 can be arbitrarily reflected on the inner panel portion 16 side or the outer panel portion 17 side, and the light transmitted through the inner panel portion 16 can be reflected between the inner panel portion 16 and the outer panel. The light can be reflected multiple times with respect to the portion 17 . As a result, it is possible to realize an illumination mode that is three-dimensional and has a sense of depth.

In addition, in this embodiment, the reflecting member 30 for reflecting the light transmitted through the inner panel portion 16 is provided, and the reflecting member 30 and the dimming member 20 are alternately attached to the outer panel portion 17 in the plate surface direction. is set.

According to the decorative panel 10 as described above, even when the reflectance of the light control member 20 is lowered, the light passing through the inner panel portion 16 can be reflected by the reflecting member 30 . As a result, even with the decorative panel 10 having a relatively small thickness, it is possible to realize a three-dimensional lighting mode with a sense of depth. In addition, since the reflecting members 30 and the light control members 20 are alternately adhered to the outer panel portion 17 in the plate surface direction, the variation of patterns that can be produced by the decorative panel 10 can be increased.

Further, in the present embodiment, the light control member 20 has a light control electrode 21, a counter electrode 22 arranged to face the light control electrode 21, and a liquid electrolyte containing at least silver ions. 21 and a counter electrode 22 are in contact with each other, and the reversible formation and elution of a silver coating on the dimming electrode 21 by energization can change its own transmittance and reflectance. It is said that

According to such a configuration, the reversible formation and elution of the silver coating on the light control electrode 21 by energization makes it possible to make a practical vehicle interior material (additional material) provided with the light control member 20 capable of changing the transmittance and reflectance. A decorative panel 10) can be provided.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIG. In the present embodiment, a decorating panel 110 having a different configuration of the decorating portion from that in the first embodiment is exemplified. In addition, in this embodiment, the same reference numerals are used for the same portions as those in the above-described embodiment, and overlapping descriptions of structures, functions, and effects are omitted.

The decorative portion 112 of the decorative panel 110 includes a light control member 120 attached over the entire inner surface of the inner panel portion 16 and a reflective member 120 attached over the entire inner surface of the outer panel portion 17 . a member 130; The light control member 120 and the reflection member 130 are attached at overlapping positions in the vehicle interior and exterior directions so that they face each other.

Next, the effects of this embodiment will be described. The decorative panel 110 in the present embodiment has a reflecting member 130 that reflects light passing through the inner panel portion 16, a light control member 120 is attached to the inner panel portion 16, and a light control member 120 is attached to the outer panel portion 17. , a reflective member 130 is attached.

According to such a decorative panel 110, when the light control member 120 attached to the inner panel portion 16 has a high transmittance and a low reflectance, light transmitted through the inner panel portion 16 by the reflecting member 130 is can be reflected to the interior of the vehicle, and when the transmittance is low and the reflectance is high, the light passing through the inner panel portion 16 can be reflected to the interior of the vehicle by the light control member 120. As a result, only by changing the transmittance and reflectance of the light control member 120 attached to the inner panel portion 16, it is possible to realize a three-dimensional lighting mode with a sense of depth.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIG. In the present embodiment, a decorative panel 210 having a decorative portion with a different configuration from that in the above-described embodiment is exemplified. In addition, in this embodiment, the same reference numerals are used for the same portions as those in the above-described embodiment, and overlapping descriptions of structures, functions, and effects are omitted.

The decorating portion 212 of the decorating panel 210 has a plurality of light control members 220 and a plurality of reflecting members 230 alternately attached at predetermined intervals on the inner surface of the outer panel portion 17 . No light control member or reflecting member is attached to the inner surface of the inner panel portion 16 . As a result, by simply changing the transmittance and reflectance of the light control member 220 attached to the outer panel portion 17, it is possible to realize a three-dimensional lighting mode with a sense of depth.

<Modification 1>
Next, Modification 1 of the present invention will be described with reference to FIG. In the present embodiment, a decorative panel 310 having a decorative portion with a different shape from that in the above-described embodiment is exemplified. In addition, in this embodiment, the description overlapping with the said embodiment about a structure, an effect|action, and an effect is abbreviate|omitted.

The decorating portion 312 of the decorating panel 310 is composed of a plate-shaped inner panel portion 316 capable of transmitting light, and a plate-shaped outer panel portion 317 disposed facing the interior side of the inner panel portion 316. It is a housing member having a trapezoidal cross-sectional view that includes the light control member 20 and the reflecting member 30 and has a double structure. The inner panel portion 316 has a shape that bulges toward the interior of the vehicle toward the central portion 313 in the vertical direction. The outer panel portion 317 has a shape extending in the vertical direction.

<Modification 2>
Next, Modification 2 of the present invention will be described with reference to FIG. In the present embodiment, a decorative panel 410 having a decorative portion with a different shape from that in the above-described embodiment is exemplified. In addition, in this embodiment, the description overlapping with the said embodiment about a structure, an effect|action, and an effect is abbreviate|omitted.

The decorating portion 412 of the decorating panel 410 is composed of a plate-like inner panel portion 416 capable of transmitting light, and a plate-like outer panel portion 417 disposed facing the interior side of the inner panel portion 416. It is a housing member having a pentagonal cross-sectional view that includes the light control member 20 and the reflecting member 30 and has a double structure. The inner panel portion 416 has a shape extending in the vertical direction. The outer panel portion 417 has a shape that is recessed toward the interior of the vehicle toward the central portion 413 in the vertical direction.

<Other embodiments>
The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. can be implemented with various changes.

(1) In addition to the above-described embodiment and modifications, the configuration of the decorative portion can be changed as appropriate. In the above-described embodiment and modified example, the decorating section has a reflecting member, but the present invention is not limited to this. For example, the decorating section has light control members attached to face the entire inner surface of the inner panel section and the entire inner surface of the outer panel section, and does not have a reflecting member. It can be a thing. Also, the decorating section may have a light control member attached over the entire inner surface of the outer panel section only.

(2) In addition to the above embodiments and modifications, the surface of the outer panel portion on which the light control member and the reflecting member are attached can be changed as appropriate. For example, the light control member and the reflecting member may be attached to the outer surface of the outer panel portion (the surface on the vehicle exterior side). In this case, the outer panel portion is made of a member capable of transmitting light like the inner panel portion.

(3) In the first embodiment, as shown in FIG. 2, the light control member 20 and the reflecting member 30 are directed forward of the vehicle compartment so as to follow the shape of the decorative panel 10 when viewed from the inside of the vehicle compartment. A plurality of stripes curved toward the interior of the vehicle are formed as much as possible, but the present invention is not limited to this. For example, the dimming member 20 and the reflecting member 30 may be arranged so as to form a dot pattern or a checkered pattern when viewed from the inside of the passenger compartment.
(4) In the above embodiment, the decorative panel is attached to the door trim, but the present invention is not limited to this. For example, decorative panels may be attached to instrument panels, roof trims, floor mats, pillar trims, and the like.

(5) The decorative panels exemplified in the above embodiments and modifications are not limited to those provided for vehicles, and may be provided for various vehicles. For example, the decorative panel can be applied to vehicles such as trains and amusement vehicles as ground vehicles, airplanes and helicopters as flying vehicles, and ships and submarines as sea and undersea vehicles.

REFERENCE SIGNS LIST 1 vehicle (vehicle) 3 door trim 10, 110, 210, 310, 410 decorative panel 12, 112, 212, 312, 412 decorative portion 16, 316, 416 inner panel portion 17 , 317, 417... Outer panel portion 20, 120, 220,... Light control member 21... Light control pole 22... Counter electrode 23... Silver plating bath part 30, 130, 230... Reflective member

Claims (4)

A decorative panel as an interior material for a vehicle,
a plate-like inner panel portion that can transmit light;
a plate-shaped outer panel portion arranged to face the vehicle interior side of the inner panel portion;
a light modulating member configured to be able to change its own transmittance and reflectance with respect to the light transmitted through the inner panel portion;
a reflective member that reflects light passing through the inner panel portion ;
The light control member is attached to at least one of the inner panel portion and the outer panel portion ,
The decorative panel is a member extending in the first direction,
In the inner portion of the inner panel portion, a plurality of mountain-shaped peaks on the vehicle interior side and a plurality of valley-shaped valleys on the vehicle interior interior are arranged in a second direction in which at least the first direction intersects. are arranged alternately along the
A decorative panel , wherein the reflecting member and the light control member are alternately attached to the outer panel portion along the second direction in the plate surface direction thereof . 2. The decorative panel according to claim 1, wherein the light control member is attached to the inner panel portion and the outer panel portion at positions overlapping each other in the vehicle interior and exterior directions. Having a reflecting member that reflects light passing through the inner panel portion,
The light control member is attached to the inner panel portion,
2. The decorative panel according to claim 1, wherein the reflecting member is attached to the outer panel portion. The light control member is
a dimming pole;
a counter electrode arranged to face the dimming electrode;
a silver plating bath having a liquid electrolyte containing at least silver ions, wherein the dimming electrode and the counter electrode are in contact;
4. A structure according to any one of claims 1 to 3 , characterized in that the transmittance and reflectance of the light control electrode can be changed by reversible formation and elution of a silver coating on the light control electrode by energization. The decorative panel described in the paragraph.

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