JP2024020668A - Metal salt precipitation type element - Google Patents

Abstract

The present invention provides a metal salt precipitation type element that can improve visibility. A metal salt precipitation type element 1 according to an embodiment includes a first electrode 11 in the form of a film, a second electrode 12 in the form of a film opposite to the first electrode 11, and a first electrode 11 and a second electrode. A pair of transparent substrates 20 sandwiching the first electrode 11 and the second electrode 12, and a pair of transparent substrates 20 sandwiching the first electrode 11 and the second electrode 12, and the first electrode 11 and the second electrode A spacer 30 defining a space S between the first electrode 12 and the spacer 30, and an electrolytic solution 40 accommodated in the space S defined by the first electrode 11, the second electrode 12 and the spacer 30, 11, the second electrode 12 and the spacer 30 are transparent. [Selection diagram] Figure 1

Description

The present disclosure relates to a metal salt precipitation type device.

JP-A-2012-181389 describes an electrochromic display device having a mirror display mode. An electrochromic display device includes a pair of transparent substrates, a pair of transparent electrodes formed on opposing surfaces of the pair of substrates, and an electrochromic material containing silver and a mediator, which is sandwiched between the pair of transparent electrodes. It has an electrolyte layer.

The electrolyte layer contains an electrolyte as a supporting salt and also contains an electrochromic material containing silver ions and a mediator. Electrochromic materials produce displays by depositing or disappearing fine silver particles through redox reactions and causing color changes based on this. Examples of electrochromic materials containing silver include AgNO ₃ , AgClO ₄ , and AgBr. The pair of transparent electrodes are each connected to a power source via conductive wiring, and application and removal of voltage to the electrolyte layer are controlled by turning the power source ON and OFF.

For example, an electrochromic display device achieves a reflective state or a black state when a voltage is applied, and a transmissive state when the voltage is removed. In an electrochromic display device, the distance between a pair of transparent electrodes is set to 500 μm using a spacer, and an electrolyte layer is formed between the pair of transparent electrodes. When -2.5V is applied to the transparent electrode, the electrochromic display has sufficient reflective properties. On the other hand, when +2.5V is applied to the transparent electrode, the electrochromic display exhibits a very low reflectance and enters a black state. Further, when no voltage is applied to the transparent electrode, the electrochromic display device loses its color and enters a light-transmitting state. In other words, when -2.5V is applied, a reflective state or mirror state is achieved, when +2.5V is applied a black state is achieved, and when no voltage is applied a light transmitting state or transparent state is achieved. Ru.

Japanese Patent Application Publication No. 2012-181389

In the electrochromic display device described above, the distance between the pair of transparent electrodes is determined by a spacer placed so as to surround the electrolyte layer. When viewed from the direction in which the pair of transparent electrodes face each other, a frame of colored spacers surrounding the electrolyte layer is visible. Metal salt precipitation type elements such as the electrochromic display device described above are required to have good visibility when viewed, and recently a frameless structure is required.

The present disclosure aims to provide a metal salt precipitation type element that can improve visibility.

A metal salt precipitation type element according to one aspect of the present disclosure includes a first electrode in the form of a film, a second electrode in the form of a film opposite to the first electrode, and a stacking direction in which the first electrode and the second electrode face each other. a pair of transparent substrates sandwiching a first electrode and a second electrode; a spacer sandwiched between the first electrode and the second electrode to define a space between the first electrode and the second electrode; The first electrode, the second electrode, and the spacer are transparent.

In this metal salt precipitation type element, an electrolytic solution is contained in a space defined by a transparent first electrode, a transparent second electrode, and a transparent spacer. The first electrode and the second electrode are opposed to each other and are sandwiched between a pair of transparent substrates along opposing stacking directions. When no voltage is applied to the first electrode and the second electrode and the electrolyte is transparent, metal salt precipitation occurs because the pair of transparent substrates, the electrolyte, the first electrode, the second electrode, and the spacer are transparent. The visibility when the mold element is visually recognized can be improved. When a voltage is applied to the first electrode and the second electrode and the electrolyte is not transparent, the opaque electrolyte enters the space defined by the transparent first electrode, the transparent second electrode, and the transparent spacer. be accommodated. In this case, since the periphery of the opaque electrolyte is transparent, visibility when the metal salt precipitation type element is visually recognized can be improved.

The spacer may be adhered to each of the first electrode and the second electrode via an adhesive, and the adhesive may be transparent. In this case, the spacer can be fixed to the first electrode and the second electrode by adhering the spacer to each of the first electrode and the second electrode using an adhesive. When the adhesive is transparent, it can be made more difficult to see than when the adhesive is not transparent. Therefore, visibility when the metal salt precipitation type element is visually recognized can be further improved.

The first electrode and the second electrode are connected to an external electrode, and include a linear electrode that connects the second electrode and the external electrode to each other, and the linear electrode extends from the external electrode across the electrolyte and the spacer to the second electrode. It may extend to the electrode. Since the electrode that connects the second electrode and the external electrode is linear, the electrode can be made more difficult to visually recognize than when the electrode is not linear. Therefore, visibility when the metal salt precipitation type element is visually recognized can be further improved.

The thickness of the linear electrode may be 1.0 mm or less. By setting the thickness of the electrode to 1.0 mm or less, the linear electrode can be made more difficult to visually recognize. Therefore, visibility when the metal salt precipitation type element is visually recognized can be further improved.

According to the present disclosure, visibility can be improved.

FIG. 1 is a cross-sectional view schematically showing a metal salt precipitation type element according to an embodiment. FIG. 1 is a front view schematically showing a metal salt precipitation type element according to an embodiment. FIG. 2 is an enlarged cross-sectional view showing a spacer and an adhesive in a metal salt precipitation type element according to an embodiment. (a) is a schematic diagram when an inner mirror to which a metal salt precipitation type element is applied is in a transparent state. (b) is a schematic diagram when the inner mirror to which the metal salt precipitation type element is applied is in a colored state. (c) is a schematic diagram when the inner mirror to which a metal salt precipitation type element is applied is in a reflective state.

Hereinafter, embodiments of a metal salt precipitation type element according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description will be omitted as appropriate. In addition, some parts of the drawings may be simplified or exaggerated for ease of understanding, and the dimensional ratios and the like are not limited to those shown in the drawings.

As shown in FIG. 1, the metal salt precipitation type element 1 according to the present embodiment includes a first electrode 11 in the form of a film, a second electrode 12 in the form of a film opposite to the first electrode 11, and a pair of transparent substrates. 20. The pair of transparent substrates 20 sandwich the first electrode 11 and the second electrode 12 along the stacking direction (Y direction) in which the first electrode 11 and the second electrode 12 face each other.

Each of the first electrode 11 and the second electrode 12 is, for example, a transparent electrode and constitutes an electrode pair. In this case, each of the first electrode 11 and the second electrode 12 is a transparent electrode film formed on each opposing surface of the pair of transparent substrates 20. Each of the first electrode 11 and the second electrode 12 is made of, for example, at least one of ITO (Indium Tin Oxide), FTO (F-doped Tin Oxide), tin oxide, and zinc oxide. It is configured. When the first electrode 11 and the second electrode 12 are ITO transparent electrode films, for example, the surface resistance value of the first electrode 11 and the second electrode 12 is 10Ω/□.

The pair of transparent substrates 20 are, for example, shaped like rectangular plates. The transparent substrate 20 may be made of transparent glass or transparent resin. The pair of transparent substrates 20 includes, for example, a first substrate 21 and a second substrate 22. The first substrate 21 has a first inner surface 21a with which the first electrode 11 contacts, and a first outer surface 21b facing opposite to the first inner surface 21a in the Y direction. The second substrate 22 has a second inner surface 22a with which the second electrode 12 contacts, and a second outer surface 22b facing opposite to the second inner surface 22a in the Y direction. In this case, the first inner surface 21a and the second inner surface 22a are surfaces of the pair of transparent substrates 20 that face each other. For example, the first inner surface 21a, the second inner surface 22a, the first outer surface 21b, and the second outer surface 22b are smooth surfaces (may be flat surfaces). A smooth surface is a smooth surface without irregularities, and includes flat surfaces and curved surfaces. A flat surface is a plane. An antireflection film may be provided on at least one of the first outer surface 21b and the second outer surface 22b.

When viewed from the Y direction, the positions of the first substrate 21 and the second substrate 22 are shifted from each other. As a result, the first substrate 21 has a first end portion 21c that protrudes in one direction (Z direction) orthogonal to the Y direction. Similarly, the second substrate 22 has a second end 22c that protrudes to the other side in the Z direction. When viewed from one side in the Y direction, a portion of the first electrode 11 that contacts the first inner surface 21a of the first end portion 21c (hereinafter referred to as the first electrode exposed portion 11a) is visible. When viewed from the other side in the Y direction, a portion of the second electrode 12 that contacts the second inner surface 22a of the second end portion 22c (hereinafter referred to as a second electrode exposed portion 12a) is visible. The first electrode exposed portion 11a does not face the second electrode 12 in the Y direction. The second electrode exposed portion 12a does not face the first electrode 11 in the Y direction. The first electrode exposed portion 11a and the second electrode exposed portion 12a are diagonally opposite to each other with an electrolytic solution 40 and a spacer 30, which will be described later, in between. That is, the first electrode exposed portion 11a faces the second electrode exposed portion 12a along a direction inclined in both the Z direction and the Y direction.

The metal salt precipitation type element 1 includes a spacer 30 that defines a space S between the first electrode 11 and the second electrode 12, and an electrolytic solution 40 accommodated in the space S. The spacer 30 is sandwiched between the first electrode 11 and the second electrode 12. The space S is defined by the first electrode 11, the second electrode 12, and the spacer 30.

The spacer 30 sandwiched between the first electrode 11 and the second electrode 12 is transparent. The spacer 30 may be made of transparent glass or transparent resin. FIG. 2 is a front view of the metal salt precipitation type element 1 according to the embodiment. In the metal salt precipitation type element 1 shown in FIG. 2, the spacer 30 is arranged so as to define a space S in a region including the center of the transparent substrate 20 when viewed from the Y direction. For example, the space S has a rectangular shape when viewed from the Y direction. As an example, the shape of the spacer 30 when viewed from the Y direction is a frame shape that extends along both the X direction and the Z direction (XZ plane). The X direction is a direction perpendicular to both the Y direction and the Z direction.

The spacer 30 may be composed of a single part or a plurality of parts. As an example, the spacer 30 may be composed of a plurality of rectangular parallelepiped glass members. In this case, the spacer 30 is composed of a glass member 31, a glass member 32, a glass member 33, and a glass member 34. The glass member 31 and the glass member 32 face each other across the space S in the Z direction. The glass member 33 and the glass member 34 face each other across the space S in the X direction. The glass member 31, the glass member 32, the glass member 33, and the glass member 34 define a space S that has a rectangular shape when viewed from the Y direction. That is, the glass member 31, the glass member 32, the glass member 33, and the glass member 34 constitute a frame in which a rectangular hole is defined in a region including the center when viewed from the Y direction.

In the metal salt precipitation type element 1 according to the embodiment, the edge surrounding the rectangular space S at the center (the position where the spacer 30 is provided) is transparent when viewed from the Y direction. Therefore, the metal salt precipitation type element 1 constitutes a frameless metal salt precipitation type element 1.

As shown in FIGS. 1 and 2, the spacer 30 defines a space S between the first electrode 11 and the second electrode 12. An electrolytic solution 40 is accommodated in a space S defined between the spacer 30, the first electrode 11, and the second electrode 12. This electrolytic solution 40 constitutes a changing region 1a of the metal salt precipitation type element 1 that changes from a transparent state to a mirror state. The changing region 1a indicates a region of the metal salt precipitation type element 1 that changes to any one of a transparent state, a colored state, and a mirror state. In the metal salt precipitation type element 1, the variable region 1a is provided in the space S in which the electrolytic solution 40 is accommodated. That is, the metal salt precipitation type element 1 constitutes a frameless metal salt precipitation type element in which the variable region 1a is provided in a region including the center when viewed from the Y direction. Details of the transparent state, colored state, and mirror state will be described later.

The electrolytic solution 40 is, for example, a liquid containing at least one of silver ions and copper ions in a solvent containing methanol. As an example, the electrolytic solution 40 is an electrolytic solution 40 that contains propylene carbonate and methanol as solvents, and also contains AgNO ₃ (silver nitrate), CuCl ₂ (cupric chloride), and LiBr (lithium bromide) as solutes. For example, the electrolytic solution 40 may contain a non-aqueous solvent having a higher boiling point than methanol, and methanol containing less weight than the non-aqueous solvent. The electrolytic solution 40 may be such that the non-aqueous solution having a boiling point higher than methanol contains propylene carbonate as the component with the largest content weight.

For example, the weight of silver nitrate contained in the electrolytic solution 40 is greater than the weight of cupric chloride contained in the electrolytic solution 40. A thickener may be added to the electrolytic solution 40. This thickener may be constituted by a polymer such as, for example, polypropylene, polyvinyl butyral or polymethyl methacrylate.

The first electrode 11 and the second electrode 12 are connected to the external electrode E. The metal salt precipitation type element 1 includes a linear electrode 50 that connects the second electrode 12 and the external electrode E to each other. The external electrode E is, for example, a DC power source that generates a potential difference between the first electrode 11 and the second electrode 12. Each of the first electrode 11 and the second electrode 12 is electrically connected to the external electrode E. The external electrode E includes a positive electrode E1 where a positive voltage is generated and a negative electrode E2 where a negative voltage is generated. For example, the positive electrode E1 of the external electrode E is connected to the first electrode exposed portion 11a. The positive electrode E1 extends in the X direction along the first electrode exposed portion 11a and is connected to the first electrode exposed portion 11a. For example, the length of the positive electrode E1 in the X direction and the length of the first electrode exposed portion 11a in the X direction are greater than or equal to the length of the space S in the X direction. Negative electrode E2 is connected to linear electrode 50. The linear electrode 50 is connected to the second electrode exposed portion 12a. The linear electrode 50 extends in the X direction along the second electrode exposed portion 12a. For example, the length of the electrode 50 in the X direction and the length of the second electrode exposed portion 12a in the X direction are greater than or equal to the length of the space S in the X direction.

The linear electrode 50 extends from the external electrode E to the second electrode 12 over the electrolytic solution 40 and the spacer 30. That is, the linear electrode 50 bypasses the spacer 30 and the electrolyte 40 and extends to the second electrode 12 . The linear electrode 50 is made of, for example, a conductive silver paste applied to the surface of the metal salt precipitation type element 1. The linear electrode 50 may include a bridge portion 50a extending along a surface (hereinafter referred to as a side surface 1b) located at the end of the metal salt precipitation type element 1 in the X direction. The side surface 1b includes, for example, a spacer 30 and a pair of transparent substrates 20 sandwiching the spacer 30 therebetween. The bridge portion 50a extends in the Z direction along the side surface 1b. The linear electrode 50 may extend over the electrolyte 40 and the spacer 30 at the bridge portion 50a. The bridge portion 50a extends beyond the electrolytic solution 40 and the spacer 30 from the negative electrode E2 toward the second electrode exposed portion 12a. The bridge portion 50a is composed of, for example, a silver paste applied to the insulated side surface 1b. The thickness of the linear electrode 50 is, for example, 0.5 mm or more and 1.0 mm or less.

When a voltage is applied from the external electrode E, a potential difference occurs between the first electrode 11 and the second electrode 12. At this time, one of the first electrode 11 and the second electrode 12 is set as a positive electrode, and the other is set as a negative electrode. In this embodiment, the first electrode 11 is set as a positive electrode, and the second electrode 12 is set as a negative electrode.

Then, an electric field is generated from the first electrode 11 set as a positive electrode toward the second electrode 12 set as a negative electrode. The direction of the electric field substantially coincides with the Y direction. Due to this electric field, metal cations (eg, Ag ⁺ , Cu ²⁺ ) in the electrolytic solution 40 move to the second electrode 12 set as a negative electrode and are reduced.

As a result, a deposited layer containing, for example, silver and copper is formed on the second electrode 12, and a reflective surface with high light reflectance is formed. That is, when a voltage is applied between the first electrode 11 and the second electrode 12, the changed region 1a of the metal salt precipitation type element 1 changes into a mirror state that reflects light.

When no voltage is applied from the external electrode E, no potential difference occurs between the first electrode 11 and the second electrode 12. That is, since there is no potential (floating potential) between the first electrode 11 and the second electrode 12, metal cations (eg, Ag ⁺ , Cu ²⁺ ) and anions (eg, NO ₃ ⁻ , Cl ^{− )} in the electrolytic solution 40 ) are in a dispersed state.

Therefore, the electrolytic solution 40 is almost colorless and transparent. In the changed region 1a of the metal salt precipitation type element 1, the entire metal salt precipitation type element 1 from the first substrate 21 and the first electrode 11 to the second electrode 12 and the second substrate 22 including the electrolyte 40 is Almost colorless and transparent. That is, when no voltage is applied between the first electrode 11 and the second electrode 12, the changed region 1a of the metal salt precipitation type element 1 is in a transparent state that transmits light.

The light reflectance of the variable region 1a of the metal salt precipitation type element 1 gradually increases in response to the magnitude of the applied voltage. That is, the changing region 1a of the metal salt precipitation type element 1 gradually changes from a transparent state to a mirror state depending on the magnitude of the applied voltage.

As shown in FIG. 3, the spacer 30 is bonded to each of the first electrode 11 and the second electrode 12 via an adhesive 35. The adhesive 35 is applied between the first electrode 11 and the spacer 30 and between the second electrode 12 and the spacer 30, respectively. In this embodiment, adhesive 35 is transparent. The adhesive 35 is, for example, a transparent epoxy adhesive. The thickness of each adhesive 35 in the Y direction is, for example, 50 μm (that is, the thickness of the adhesive 35 in the Y direction is the thickness of the adhesive 35 between the first electrode 11 and the spacer 30, The total thickness of the adhesive 35 between the electrode 12 and the spacer 30 is 100 μm). The thickness of the spacer 30 is, for example, 300 μm or more and 400 μm or less. Therefore, the distance between the first electrode 11 and the second electrode 12 is 400 μm or more and 500 μm or less.

4(a), FIG. 4(b), and FIG. 4(c) are schematic diagrams showing an example in which the metal salt precipitation type element 1 is applied as an interior mirror 2 for use in a vehicle. In this example, when viewed from the Y direction (thickness direction of the metal salt precipitation type element 1), the spacer 30 surrounding the changed region 1a of the metal salt precipitation type element 1 is transparent, and the frame of the inner mirror 2 is transparent. Configure a frameless mirror. FIG. 4(a) shows a schematic diagram when the changed region 1a of the inner mirror 2 to which the metal salt precipitation type element 1 is applied is in a transparent state. In this case, both the changed region 1a of the metal salt precipitation type element 1 and the spacer 30 surrounding the changed area 1a (substantially the entire metal salt precipitation type element 1) are transparent when viewed from the Y direction. Therefore, the forward visibility can be improved through the metal salt precipitation type element 1.

FIG. 4(b) shows a schematic diagram when the changed region 1a of the inner mirror 2 to which the metal salt precipitation type element 1 is applied is in a colored state. In this case, when viewed from the Y direction, the changed region 1a of the metal salt precipitation type element 1 is, for example, in a semi-transparent state. In other words, the light transmittance in the colored state changing region 1a is lower than that in the transparent state changing region 1a. As a result, even if, for example, the setting sun enters the inside of the car, it is possible to confirm that the lights are turned on by visually checking the signals through the change area 1a of the metal salt precipitation type element 1. . Further, since the spacer 30 surrounding the changing region 1a is transparent, visibility can be ensured through the periphery of the changing region 1a.

FIG. 4(c) shows a schematic diagram when the changing region 1a of the inner mirror 2 to which the metal salt precipitation type element 1 is applied is in a mirror state. In this case, the changed region 1a of the metal salt precipitation type element 1 reflects light when viewed from the Y direction. Therefore, the rear can be visually recognized through the changed region 1a of the metal salt precipitation type element 1. Further, since the spacer 30 surrounding the changing region 1a is transparent, visibility can be ensured through the periphery of the changing region 1a.

Another example of applying the metal salt precipitation type element 1 is a case where the metal salt precipitation type element 1 is applied to eyeglasses (not shown). In these glasses, only the upper part (for example, the upper part of the glasses when worn by the wearer) has a frame, and the other parts (the side parts and the lower part) can be made frameless. These glasses can protect the wearer's eyes from light rays by changing the changed region 1a of the metal salt precipitation type element 1 into a colored state. Furthermore, since the glasses are frameless except for the upper part (the side parts and the lower part), the wearer can have good visibility.

Next, the effects obtained from the metal salt precipitation type element 1 according to this embodiment will be explained. In this metal salt precipitation type element 1, an electrolytic solution 40 is accommodated in a space S defined by a transparent first electrode 11, a transparent second electrode 12, and a transparent spacer 30. The first electrode 11 and the second electrode 12 are opposed to each other and sandwiched between a pair of transparent substrates 20 along the opposing stacking direction. When no voltage is applied to the first electrode 11 and the second electrode 12 and the electrolyte 40 is transparent, the pair of transparent substrates 20, the electrolyte 40, the first electrode 11, the second electrode 12, and the spacer 30 are Since it is transparent, visibility when the metal salt precipitation type element 1 is visually recognized can be improved. When a voltage is applied to the first electrode 11 and the second electrode 12 and the electrolyte 40 is not transparent, the opaque electrolyte 40 is connected to the transparent first electrode 11, the transparent second electrode 12, and the transparent electrolyte 40. It is accommodated in a space S defined by the spacer 30. In this case, since the periphery of the opaque electrolytic solution 40 is transparent, visibility when the metal salt precipitation type element 1 is visually recognized can be improved. Further, when the metal salt precipitation type element 1 has a rectangular shape, except for one side that serves as a fulcrum, the other three sides can be made transparent.

In this metal salt precipitation type element 1, since the adhesive 35 is transparent, the adhesive 35 can be made more difficult to see than in the case where the adhesive 35 is not transparent. It is possible to further improve the visibility when the object is visually recognized. Therefore, the visibility when the metal salt precipitation type element 1 is visually recognized can be further improved.

In this metal salt precipitation type element 1, as shown in FIG. 2, the electrode 50 that connects the second electrode 12 and the external electrode E is linear, compared to a case where the electrode 50 is not linear. Therefore, it is possible to make the electrode 50 difficult to visually recognize. Therefore, the visibility when the metal salt precipitation type element 1 is visually recognized can be further improved. In this metal salt precipitation type element 1, since the thickness of the linear electrode 50 is 1.0 mm or less, the linear electrode 50 can be made more difficult to visually recognize. Therefore, the visibility when the metal salt precipitation type element 1 is visually recognized can be further improved.

In this metal salt precipitation type element 1, the linear electrode 50 crosses the electrolytic solution 40 and the spacer 30 at a bridge portion 50a along the side surface 1b of the metal salt precipitation type element 1. As a result, when viewed from the Y direction, the side surface 1b and the bridge portion 50a form a contour on one side, making it possible to make the linear electrode 50 even more difficult to see. Therefore, the visibility when the metal salt precipitation type element 1 is visually recognized can be further improved.

In this metal salt precipitation type element 1, the bridge portion 50a of the linear electrode 50 is constituted by a silver paste applied to the side surface 1b of the metal salt precipitation type element 1. In this case, the bridge portion 50a constitutes a film-like electrode extending linearly along the side surface 1b of the metal salt precipitation type element 1. Since the bridge portion 50a is a thin film of silver paste along the side surface 1b, it is possible to make the linear electrode 50 even more difficult to see in this example. Therefore, the visibility when the metal salt precipitation type element 1 is visually recognized can be further improved.

In this metal salt precipitation type element 1, an external electrode E is connected to the first electrode exposed portion 11a, and a linear electrode 50 is connected to the second electrode exposed portion 12a. In this case, since the first electrode exposed portion 11a does not face the second electrode 12 in the Y direction, the external electrode E can be easily connected to the first electrode exposed portion 11a. Similarly, since the second electrode exposed portion 12a does not face the first electrode 11 in the Y direction, the electrode 50 can be easily connected to the second electrode exposed portion 12a.

In this metal salt precipitation type element 1, the spacer 30 sandwiched between the first electrode 11 and the second electrode 12 is constituted by a frame-shaped glass member. In this case, it is possible to secure a wider distance between the first electrode 11 and the second electrode 12, compared to the case where an adhesive mixed with glass beads or the like is used as a spacer.

The embodiment of the metal salt precipitation type element 1 according to the present disclosure has been described above. However, the metal salt precipitation type element according to the present disclosure is not limited to the above-described embodiments, and may be modified or applied to other things without changing the gist of each claim. It's okay. That is, the configuration of each part of the metal salt precipitation type element can be changed as appropriate without changing the above gist.

For example, in the embodiment described above, the spacer 30 is bonded to each of the first electrode 11 and the second electrode 12 via an adhesive 35, and the adhesive 35 is a transparent epoxy adhesive 35. explained. However, the adhesive 35 may be a transparent adhesive 35 other than epoxy, such as acrylic. The adhesive 35 may be mixed with glass beads or the like. In this case, the thickness of the adhesive 35 in the Y direction can be ensured more accurately than when glass beads or the like are not mixed.

Further, the spacer 30 does not need to be adhered to each of the first electrode 11 and the second electrode 12, but only needs to be fixed to each of the first electrode 11 and the second electrode 12. For example, the spacer 30 may be fitted into uneven portions provided on each of the first electrode 11 and the second electrode 12.

In the embodiment described above, the electrode 50 is a linear electrode, and the linear electrode 50 is made of silver paste. However, the electrode may be made of a thin film such as metal foil, or may be made of a wire such as a lead wire.

In the embodiment described above, an example was described in which the metal salt precipitation type element 1 is applied as an interior mirror 2 for use in a vehicle. However, the metal salt precipitation type element may also be applied as a part of a light-transmitting member such as a window. For example, a metal salt deposited element may be applied to the top of the front window. Since the metal salt precipitation type element is frameless, visibility can be improved even when it is used as a part of a window or the like. Further, in the metal salt precipitation type element, it is possible to adjust the light transmittance in a portion such as a window.

DESCRIPTION OF SYMBOLS 1... Metal salt precipitation type element, 1a... Change area, 2... Inner mirror, 11... First electrode, 11a... First electrode exposed part, 12... Second electrode, 12a... Second electrode exposed part, 20... Transparent substrate , 21...first substrate, 21a...first inner surface, 21b...first outer surface, 21c...first end, 22...second substrate, 22a...second inner surface, 22b...second outer surface, 22c...second end , 30... Spacer, 31, 32, 33, 34... Glass member, 35... Adhesive, 40... Electrolyte, 50... (linear) electrode, 50a... Bridge portion, S... Space, E... External electrode.

Claims (4)

a membrane-like first electrode;
a membrane-shaped second electrode facing the first electrode;
a pair of transparent substrates sandwiching the first electrode and the second electrode along the stacking direction in which the first electrode and the second electrode face each other;
a spacer sandwiched between the first electrode and the second electrode to define a space between the first electrode and the second electrode;
an electrolytic solution accommodated in the space defined by the first electrode, the second electrode, and the spacer;
Equipped with
the first electrode, the second electrode and the spacer are transparent;
Metal salt precipitation type element. The spacer is bonded to each of the first electrode and the second electrode via an adhesive,
the adhesive is transparent;
The metal salt precipitation type element according to claim 1. the first electrode and the second electrode are connected to an external electrode,
comprising a linear electrode that connects the second electrode and the external electrode to each other,
The linear electrode extends from the external electrode to the second electrode beyond the electrolyte and the spacer.
The metal salt precipitation type element according to claim 1 or 2. The thickness of the linear electrode is 1.0 mm or less,
The metal salt precipitation type element according to claim 3.

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