WO2016121332A1

WO2016121332A1 - Insulated glazing and optical device

Info

Publication number: WO2016121332A1
Application number: PCT/JP2016/000244
Authority: WO
Inventors: 真白川
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2015-01-29
Filing date: 2016-01-19
Publication date: 2016-08-04
Also published as: JP2016141573A

Abstract

This insulated glazing unit (1) comprises: a pair of glass sheets (10) and (11) which are disposed facing each other; a spacer (20) which forms a space between the pair of glass sheets (10) and (11); an electrode wire (30) which is inserted through the spacer (20); and a metal sheet (50) which is interposed between the pair of glass sheets (10) and (11) and which is electrically connected to the electrode wire (30) via a portion of the spacer (20). The metal sheet (50) is provided so as to cover said portion of the spacer (20).

Description

Multi-layer glass and optical device

The present invention relates to a multilayer glass and an optical device including the multilayer glass.

Conventionally, double-glazed glass has been used for windows of buildings and vehicles for the purpose of improving heat insulation performance. The multi-layer glass includes a plurality of glass plates and a spacer that keeps intervals between the plurality of glass plates (for example, see Patent Document 1).

Japanese Patent No. 4479690

By the way, in recent years, so-called smart windows have been developed that can realize functions such as light emission and light control by arranging optical elements in the internal space of the double-glazed glass. In the smart window, for example, in order to provide electric wiring for supplying electric power to an internal optical element, a through hole for electric wiring is provided in the spacer of the multilayer glass. At this time, there is a problem that moisture easily enters the internal space from the outside through the through hole.

Therefore, an object of the present invention is to provide a multilayer glass and an optical device that can suppress moisture from entering the internal space from the outside.

In order to achieve the above object, a multilayer glass according to one embodiment of the present invention includes a pair of glass plates arranged to face each other, a spacer that forms a gap between the pair of glass plates, and an inside of the spacer. And a metal layer interposed between the pair of glass plates and electrically connected to the electrode wiring through a part of the spacer, the metal layer including the spacer Is provided so as to cover the part.

According to the present invention, moisture can be prevented from entering the internal space from the outside.

FIG. 1 is a perspective view showing an optical device according to an embodiment of the present invention. FIG. 2 is a trihedral view showing the optical device according to the embodiment of the present invention. FIG. 3 is a cross-sectional view showing a part of the optical device according to the embodiment of the present invention. FIG. 4 is a cross-sectional view showing a connection portion between an electrode wiring and a metal plate provided in the optical device according to the embodiment of the present invention. FIG. 5A is a cross-sectional view showing the manufacturing process of the optical device according to the embodiment of the present invention. FIG. 5B is a cross-sectional view showing the manufacturing process of the optical device according to the embodiment of the present invention. FIG. 6A is a cross-sectional view for explaining the effect of the optical device according to the embodiment of the present invention. FIG. 6B is a cross-sectional view for explaining the effect of the optical device according to the embodiment of the present invention. FIG. 7 is a cross-sectional view showing a window including a plurality of optical devices according to the embodiment of the present invention. FIG. 8 is a cross-sectional view showing a connection portion between an electrode wiring and a metal plate provided in the optical device according to the first modification of the embodiment of the present invention. FIG. 9 is a cross-sectional view showing a connection portion between an electrode wiring and a metal plate provided in the optical device according to the second modification of the embodiment of the present invention.

Hereinafter, the multilayer glass and the optical device according to the embodiment of the present invention will be described in detail with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, numerical values, shapes, materials, components, arrangement and connection forms of components, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

Each figure is a schematic diagram and is not necessarily shown strictly. Moreover, in each figure, the same code | symbol is attached | subjected about the same structural member.

(Embodiment)
[Optical device]
First, the structure of the optical device and the multilayer glass according to the present embodiment will be described with reference to FIGS.

FIG. 1 is a perspective view showing an optical device 100 (and multi-layer glass 1) according to the present embodiment.

FIG. 2 is a trihedral view showing the optical device 100 (and the multi-layer glass 1) according to the present embodiment. Specifically, in FIG. 2, (a) to (c) show a front view, a top view, and a right side view of the optical device 100, respectively. In FIG. 2, the internal structure of the optical device 100 is schematically shown by shading. At this time, in FIG. 2, some of the components of the optical device 100 are not shown (for example, the primary sealing material 70 and the secondary sealing material 71).

FIG. 3 is a cross-sectional view showing a part of optical device 100 (and multi-layer glass 1) according to the present embodiment. Specifically, FIG. 3 shows a cross section taken along line III-III shown in FIG. More specifically, FIG. 3 shows a cross section passing through the spacer 20 and the metal plate 50 included in the optical device 100.

FIG. 4 is a cross-sectional view showing a connection portion between the electrode wiring 30 and the metal plate 50 provided in the optical device 100 (and the multilayer glass 1) according to the present embodiment. Specifically, FIG. 4 is an enlarged view of a region IV surrounded by an alternate long and short dash line shown in FIG.

In each figure, the direction orthogonal to the main surface of the optical device 100 (that is, the thickness direction of the optical device 100) is the Z-axis direction, and two directions parallel to the main surface of the optical device 100 and orthogonal to each other are the X-axis. Direction and Y-axis direction.

The optical device 100 according to the present embodiment includes a multilayer glass 1 and an optical element 110. As shown in FIGS. 1 to 3, the multi-layer glass 1 includes a pair of

glass plates

10 and 11, a spacer 20, an electrode wiring 30, a terminal 40, a metal plate 50, a lead wiring 60, A primary sealing material 70 and a secondary sealing material 71 are provided.

The optical device 100 can be used for windows of buildings and vehicles, for example. The optical device 100 includes the optical element 110, thereby realizing a function such as light emission or light control. That is, the optical device 100 can be used as a so-called smart window.

Hereinafter, each of the components included in the optical device 100 will be described in detail.

[Glass plate]
The glass plate 10 and the glass plate 11 have translucency and transmit at least part of visible light. The glass plate 10 and the glass plate 11 are transparent flat plates formed from, for example, soda glass or non-alkali glass.

The glass plate 10 and the glass plate 11 are arranged to face each other as shown in FIGS. 1 and 2 (b) and (c). Specifically, the glass plate 10 and the glass plate 11 are arranged so that the mutual distance (that is, the distance between the glass plate 10 and the glass plate 11) is substantially constant, that is, in parallel. The space | interval of the glass plate 10 and the glass plate 11 is 6 mm, for example.

The glass plate 10 and the glass plate 11 have substantially the same shape and substantially the same size, and are arranged so as to overlap each other in plan view, as shown in FIGS. The “plan view” means a case where the optical device 100 (and the multi-layer glass 1) is viewed from the front. Specifically, the “plan view” means a case where the main surfaces (surfaces having the largest areas) of the glass plate 10 and the glass plate 11 are viewed from the front, that is, when viewed in the Z-axis direction.

The planar shape of the glass plate 10 and the glass plate 11 is a rectangle, but may be a square or other polygons, or a circle or an ellipse. Alternatively, the glass plate 10 and the glass plate 11 are not limited to flat plates but may be curved plates.

In this embodiment, an internal space 12 (intermediate layer) is formed between the glass plate 10 and the glass plate 11. The internal space 12 is filled with, for example, a gas having a low thermal permeability. The gas having a low thermal permeability is, for example, dry air or an inert gas such as argon. In the present embodiment, as shown in FIG. 2, the optical element 110 is disposed in the internal space 12.

[Spacer]
The spacer 20 forms an interval between the pair of glass plates 10 and the glass plate 11. That is, the spacer 20 is a member that maintains a constant distance between the glass plate 10 and the glass plate 11. The spacer 20 forms an internal space 12 between the glass plate 10 and the glass plate 11 by separating the glass plate 10 and the glass plate 11.

The spacer 20 is provided between the glass plate 10 and the glass plate 11. As shown in FIG. 2A, the spacer 20 is provided in an annular shape in plan view. In the present embodiment, the planar view shape of the spacer 20 is a shape along the circumference of the glass plate 10 (or the glass plate 11). Specifically, the spacer 20 is a substantially rectangular frame body along the circumference of the glass plate 10. The spacer 20 may be formed by combining a plurality of members. For example, the spacer 20 may be formed by combining four substantially linear members (spacers) and four corner members.

The spacer 20 is electrically insulated from the electrode wiring 30 and the metal plate 50.

Specifically, the spacer 20 is not in contact with the metal plate 50. In the present embodiment, as shown in FIGS. 3 and 4, an insulating secondary seal material 71 is interposed between the spacer 20 and the metal plate 50.

In addition, the spacer 20 is not in contact with the conductor portion (metal wire) of the electrode wiring 30. The spacer 20 may be in contact with, for example, an insulating coating material that covers the conductor portion of the electrode wiring 30.

The spacer 20 includes a hollow member 21 and a desiccant 22 as shown in FIG.

The hollow member 21 is made of a metal material such as aluminum, for example. The hollow member 21 is, for example, a substantially rectangular tubular frame. Specifically, as shown in FIG. 3, the cross section of the hollow member 21 is a substantially rectangular shape in which two corners are slanted.

The desiccant 22 is filled in the hollow member 21 (hollow space). As the desiccant 22, for example, a particulate material such as silica gel or zeolite can be used. Thereby, it is possible to suppress moisture from entering the internal space 12.

The spacer 20 has a recess 23 as shown in FIG.

The recess 23 is a part of the spacer 20 provided for electrically connecting the metal plate 50 and the electrode wiring 30. The concave portion 23 is provided at a position facing the convex portion 51 of the metal plate 50. Specifically, the concave portion 23 is provided at a position overlapping the convex portion 51 in a side view. The “side view” means that the optical device 100 (and the multi-layer glass 1) is viewed from the side surface direction, specifically, the Y-axis direction.

In the present embodiment, the recess 23 is a through hole provided in the hollow member 21. At least one of the terminal 40 and the convex portion 51 is inserted into the concave portion 23. In the present embodiment, as shown in FIG. 4, the terminal 40 and the convex portion 51 are connected in the concave portion 23.

The shape of the recess 23 is, for example, a funnel shape. The opening of the recess 23 is gradually narrower along the direction from the internal space 12 toward the metal plate 50 (Y-axis negative direction). Thereby, it is possible to make it difficult for the truncated cone-shaped terminal 40 to come out of the recess 23. In addition, the shape of the recessed part 23 is not restricted to a funnel shape, What kind of thing may be sufficient.

As shown in FIG. 3, the hollow member 21 is provided with a through hole 24 on the inner space 12 side. In the present embodiment, the recess 23 and the through hole 24 are provided near the center of the hollow member 21 (the center in the Z-axis direction), but the position where each of the recess 23 and the through hole 24 is provided is particularly It is not limited.

[Electrode wiring]
The electrode wiring 30 is inserted into the spacer 20. Specifically, the inside of the spacer 20 is a hollow space of the hollow member 21. In the present embodiment, the electrode wiring 30 is provided in the internal space 12 as shown in FIG. The electrode wiring 30 is inserted into the spacer 20 through the through hole 24 of the hollow member 21.

The electrode wiring 30 is a wiring for supplying power to the optical element 110. In the present embodiment, the electrode wiring 30 is a conductive metal wire whose surface is covered with an insulating coating material such as vinyl. For example, the electrode wiring 30 is a lead wire such as a vinyl wire or an enamel wire. Since the surface of the metal wire is covered with an insulating coating material, even if the electrode wiring 30 and the hollow member 21 come into contact with each other when the electrode wiring 30 is inserted into the through hole 24, the electrode wiring 30 It is insulated from the hollow member 21 (spacer 20).

The electrode wiring 30 is connected to the optical element 110. The electrode wiring 30 is electrically connected to the metal plate 50. Specifically, one end of the electrode wiring 30 is connected to an electrode provided in the optical element 110, and the other end is connected to the conductive terminal 40. The electrode wiring 30 is electrically connected to the metal plate 50 by being connected to the terminal 40.

In the present embodiment, the optical device 100 includes two electrode wirings 30 as shown in FIG. For example, one of the two electrode wirings 30 is used for a positive electrode and the other is used for a negative electrode. Alternatively, in order to improve the in-plane uniformity of the optical element 110, a plurality of electrode wirings for supplying a voltage having the same potential may be provided. The same applies to the terminal 40, the metal plate 50, and the lead-out wiring 60.

[Terminal]
The terminal 40 is a conductive terminal connected to the metal plate 50. The terminal 40 is made of a metal material such as copper, for example.

The terminal 40 is inserted into the recess 23 as shown in FIG. The terminal 40 is physically and electrically connected to the metal plate 50 through the recess 23 by electric welding (for example, resistance welding). Similarly, the terminal 40 is physically and electrically connected to the electrode wiring 30 by electric welding.

The terminal 40 is fixed to the hollow member 21 via the secondary seal material 71 so as not to contact the hollow member 21. Thereby, the terminal 40 and the hollow member 21 (spacer 20) are electrically insulated.

The shape of the terminal 40 is, for example, a truncated cone. The cross section of the terminal 40 in the XZ plane is gradually narrowed along the direction from the internal space 12 toward the metal plate 50 (Y-axis negative direction). Thereby, it is possible to make it difficult for the terminal 40 to come out of the recess 23. In addition, the shape of the terminal 40 is not limited to a truncated cone shape, and may be any shape such as a columnar shape or a prismatic shape.

[Metal plate]
The metal plate 50 is an example of a metal layer that is interposed between the pair of

glass plates

10 and 11 and is electrically connected to the electrode wiring 30. That is, the metal plate 50 is a part of wiring for supplying power to the optical element 110. The metal plate 50 is provided so as to cover a part of the spacer 20. Specifically, the metal plate 50 is provided so as to cover a part of the spacer 20 in a side view.

The part of the spacer 20 is a part for electrically connecting the electrode wiring 30 and the metal plate 50. Specifically, the part of the spacer 20 is a recess 23. The metal plate 50 is provided so as to completely cover the recess 23 in a side view.

In the present embodiment, the metal plate 50 is a plate body provided perpendicular to the main surfaces of the pair of

glass plates

10 and 11. That is, the metal plate 50 is provided in parallel to the direction in which the glass plate 10 and the glass plate 11 are arranged (Z-axis direction). The metal plate 50 is provided between the spacer 20 and the outside of the multilayer glass 1 (that is, on the side opposite to the internal space 12 with respect to the spacer 20).

Specifically, the metal plate 50 is a substantially rectangular plate. More specifically, the shape of the metal plate 50 (the shape when viewed in the Y-axis direction) is substantially rectangular. Each side of the metal plate 50 has substantially the same length as the interval between the pair of glass plates 10 and the glass plate 11 or a length greater than or equal to the interval. In this Embodiment, the shape of the metal plate 50 is a square which makes the space | interval of the glass plate 10 and the glass plate 11 one side. In addition, although the thickness of the metal plate 50 is 3 mm, for example, what kind of thing may be sufficient as it.

The metal plate 50 is formed of a material having a moisture permeability lower than that of the secondary sealing material 71. Specifically, the metal plate 50 is formed from a metal material such as stainless steel. Moreover, as the metal plate 50, a material having a low coefficient of thermal expansion can be used.

As shown in FIG. 4, the metal plate 50 has a convex portion 51 protruding toward the spacer 20. The convex part 51 is provided in the center of the metal plate 50, for example.

The convex portion 51 is a portion for connecting the electrode wiring 30 and the metal plate 50. Specifically, the convex portion 51 is inserted into the concave portion 23 of the spacer 20. The convex portion 51 is physically and electrically connected to the terminal 40 to which the electrode wiring 30 is connected in the concave portion 23.

[Drawer wiring]
The lead wiring 60 is an electrical wiring for supplying power to the optical element 110. In the present embodiment, the lead-out wiring 60 is a conductive metal wire whose surface is covered with an insulating coating material such as vinyl. For example, the lead wiring 60 is a lead wire such as a vinyl wire or an enamel wire.

The lead-out wiring 60 is covered with a secondary sealing material 71 and is drawn out to the outside of the optical device 100. The lead wiring 60 is connected to the metal plate 50. Specifically, one end of the lead-out wiring 60 is connected to the metal plate 50, and the other end is connected to a drive circuit or a power supply circuit (not shown) for driving the optical element 110. Yes.

Note that the lead-out wiring 60 is connected near the center of the metal plate 50 as shown in FIG. The position to which the lead wiring 60 is connected is not limited to this, and may be connected anywhere on the metal plate 50.

[Primary sealing material]
The primary sealing material 70 is an adhesive for bonding the spacer 20 to the glass plate 10 and the glass plate 11. As shown in FIG. 3, the primary sealing material 70 is provided between the spacer 20 and the glass plate 10 and between the spacer 20 and the glass plate 11. Further, the primary sealing material 70 is provided along the planar view shape of the spacer 20. Specifically, the primary sealing material 70 is provided in an annular shape.

As the primary sealing material 70, for example, a sealing material mainly composed of butyl rubber or the like can be used.

[Secondary sealing material]
The secondary sealing material 71 is a resin material used for improving the sealing performance of the internal space 12. As shown in FIG. 3, the secondary sealing material 71 is provided so as to cover the outer side of the spacer 20 (the side opposite to the internal space 12). The secondary sealing material 71 is provided along the planar view shape of the spacer 20. Specifically, the secondary sealing material 71 is provided in an annular shape.

Further, as shown in FIG. 3, a metal plate 50 is provided inside the secondary sealing material 71. The lead-out wiring 60 is inserted through the secondary seal material 71. In other words, the secondary sealing material 71 is provided between the glass plate 10 and the glass plate 11 so as to cover the lead wiring 60.

As the secondary sealing material 71, for example, a polysulfide-based post-curing sealing material can be used.

[Optical element]
The optical element 110 is sealed with a pair of

glass plates

10 and 11 and a spacer 20. Specifically, the optical element 110 is disposed in the internal space 12.

The optical element 110 is connected to the electrode wiring 30. Specifically, the optical element 110 includes one or more electrodes (for example, an anode and a cathode). An electrode wiring 30 is connected to each of the one or more electrodes.

The optical element 110 is an element that can change optical characteristics by supplying power. Specifically, the optical element 110 performs self-emission or dimming. The dimming is, for example, changing light transmittance (visible light), reflectance, refractive index, scattering property, and the like.

For example, the optical element 110 is an organic EL (Electroluminescence) element. Alternatively, the optical element 110 may be a liquid crystal or an electrochromic element. A plurality of optical elements 110 may be disposed in the internal space 12.

[Production method]
Then, the manufacturing method of the optical device 100 (and multilayer glass 1) which concerns on this Embodiment is demonstrated using FIG. 5A and 5B.

FIG. 5A and FIG. 5B are cross-sectional views showing manufacturing steps of the optical device 100 (and the multi-layer glass 1) according to the present embodiment.

First, as shown to (a) of FIG. 5A, the glass plate 10 in which the optical element 110 was provided is prepared. For example, the optical element 110 is formed on the glass plate 10, and the electrode wiring 30 is connected to the electrode provided in the optical element 110. For example, one end of the electrode wiring 30 is connected to the electrode of the optical element 110 by soldering or connector connection.

Next, the electrode wiring 30 is connected to the terminal 40 as shown in FIG. For example, the electrode wiring 30 and the terminal 40 are connected by electric welding (resistance welding). Specifically, first, the other end of the electrode wiring 30 is inserted into the inside of the spacer 20 (the hollow space of the hollow member 21) through the through hole 24. The terminal 40 and the electrode wiring 30 are welded by passing a current through the terminal 40 with the other end in contact with the terminal 40. The terminal 40 is temporarily fixed to the recess 23 of the hollow member 21 of the spacer 20 with an adhesive, for example.

Alternatively, the terminal 40 may be connected in advance to the other end of the electrode wiring 30. In this case, for example, the terminal 40 is inserted into the spacer 20 through the through hole 24 and temporarily fixed to the recess 23 using an adhesive. The adhesive used for temporary fixing can use the same material as the primary sealing material 70 or the secondary sealing material 71, for example.

Next, as shown in FIG. 5A (c), after filling the hollow space of the hollow member 21 with the desiccant 22, the glass plate 10 and the glass plate 11 are bonded together. Specifically, the space between the glass plate 10 and the glass plate 11 is formed by sandwiching the spacer 20 therebetween. Thereafter, the resin material 70 a is applied between the spacer 20 and the glass plate 10 and between the spacer 20 and the glass plate 11 using a discharge device 90 such as a dispenser. The resin material 70a is the primary sealing material 70 before curing, and is, for example, a thermosetting resin material. The primary sealing material 70 is formed by curing the resin material 70a by applying heat.

Next, as shown in FIG. 5B (d), a resin material 71a is applied to the outer side surface of the spacer 20 using a discharge device 91 such as a dispenser. The resin material 71a is the secondary sealing material 71 before curing, and is, for example, a thermosetting resin material having adhesiveness.

Next, as shown in FIG. 5B (e), the terminal 40 and the metal plate 50 are connected. Specifically, first, the metal plate 50 is arranged so that the convex portion 51 contacts the terminal 40. At this time, the metal plate 50 is fixed by the resin material 71a. And the convex part 51 and the terminal 40 are electrically welded. Specifically, the convex portion 51 and the terminal 40 are welded by passing a current through the metal plate 50 in a state where the convex portion 51 and the terminal 40 are in contact with each other.

Next, as shown in FIG. 5B (f), after the lead-out wiring 60 is connected to the metal plate 50, the secondary sealant 71 is formed. Specifically, first, the lead wiring 60 and the metal plate 50 are connected. The connection may be electric welding or soldering. Then, similarly to (d) of FIG. 5B, the resin material 71 a is applied using the discharge device 91 so as to fill the lead-out wiring 60 and the metal plate 50. Thereafter, the secondary sealing material 71 is formed by curing the resin material 71a by applying heat.

As described above, the optical device 100 and the multilayer glass 1 according to the present embodiment can be manufactured.

[Effects, etc.]
Below, the effect of the optical device 100 which concerns on this Embodiment, and the multilayer glass 1 is demonstrated using FIG. 6A and FIG. 6B.

6A and 6B are cross-sectional views for explaining the effect of the optical device 100 (and the multi-layer glass 1) according to the present embodiment. Specifically, FIG. 6A shows an optical device 100a (and a multi-layer glass 1a) that does not include the metal plate 50.

As shown in FIG. 6A, in the multilayer glass 1a, since the metal plate 50 is not provided, an electrode wire 30a is provided instead of the electrode wire 30, the terminal 40, the metal plate 50, and the lead-out wire 60. The electrode wiring 30 a penetrates the spacer 20 and is drawn from the internal space 12 to the outside of the multilayer glass 1.

In the multi-layer glass 1a, there is a problem that moisture easily enters the internal space 12 from the outside because the electrode wiring 30a is provided. This is because a recess 23 and a through-hole 24 are formed in a part of the spacer 20 for drawing the electrode wiring 30a to the outside of the multilayer glass 1. For example, the shortest path through which moisture enters is a straight line as shown by a thick broken line in FIG. 6A.

On the other hand, the multi-layer glass 1 according to the present embodiment includes a pair of

glass plates

10 and 11 arranged opposite to each other, and a spacer that forms a gap between the pair of glass plates 10 and the glass plate 11. 20, the electrode wiring 30 inserted into the spacer 20, and a pair of the glass plate 10 and the glass plate 11, and electrically connected to the electrode wiring 30 through a part of the spacer 20. The metal plate 50 is provided so as to cover a part of the spacer 20. In addition, the optical device 100 according to the present embodiment is an optical device including the multilayer glass 1, the spacer 20 is provided in an annular shape, and the optical device 100 includes a pair of glass plates 10, a glass plate 11, and a spacer. 20 and the optical element 110 connected to the electrode wiring 30.

Accordingly, since the metal plate 50 is provided so as to cover a part of the spacer 20 (specifically, the recess 23), moisture is prevented from entering the internal space 12 through a part of the spacer 20. can do.

Specifically, in the multilayer glass 1 according to the present embodiment, the shortest path through which moisture enters must pass between the metal plate 50 and the spacer 20 as shown by the thick broken line in FIG. 6B. . That is, in order for moisture to enter the internal space 12, the metal plate 50 must be bypassed. This is because the metal plate 50 has a lower moisture permeability than the secondary sealing material 71 formed of a resin material, and hardly allows moisture to pass through.

Therefore, as is clear by comparing FIG. 6A and FIG. 6B, in the multilayer glass 1 according to the present embodiment, the ingress of moisture is suppressed compared to the multilayer glass 1 a not provided with the metal plate 50. can do.

In this embodiment, a desiccant 22 is provided inside the spacer 20. For this reason, since moisture is absorbed by the desiccant 22, the penetration of moisture into the internal space 12 is more effectively suppressed.

At this time, the longer the distance until the moisture reaches the desiccant 22, the longer the life of the desiccant 22 can be.

In the present embodiment, the metal plate 50 is provided between the spacer 20 and the outside of the optical device 100 (and the multilayer glass 1). Therefore, since the distance until the moisture reaches the desiccant 22 can be increased, the penetration of moisture can be more effectively suppressed.

Further, in the optical device 100 (and the multi-layer glass 1) according to the present embodiment, for example, it is assumed that a plurality of electrode wirings 30 are provided as shown in FIG. At this time, when the spacer 20 and the plurality of electrode wirings 30 are not electrically insulated, the plurality of electrode wirings 30 are short-circuited via the spacer 20. Therefore, the optical element 110 does not operate normally, and the reliability of the optical device 100 decreases.

Further, even when the optical device 100 (and the multi-layer glass 1) includes only one electrode wiring 30, there is a possibility that a voltage drop due to the spacer 20 may occur due to the current flowing through the spacer 20. Therefore, an appropriate voltage cannot be supplied to the optical element 110 due to the voltage drop caused by the spacer 20, and the reliability of the optical device 100 is lowered.

In contrast, in the multilayer glass 1 according to the present embodiment, for example, the spacer 20 is electrically insulated from the electrode wiring 30 and the metal plate 50.

Thus, short-circuiting of the plurality of electrode wirings 30 via the spacer 20 is suppressed, and the reliability of the optical device 100 can be improved. Moreover, since the voltage drop by the spacer 20 does not generate | occur | produce, the reliability of the optical device 100 (and multilayer glass 1) can be improved.

Further, for example, the metal plate 50 has a convex portion 51 protruding toward the spacer 20, and a part of the spacer 20 is a concave portion 23 provided at a position facing the convex portion 51.

Thereby, since the convex portion 51 and the concave portion 23 are opposed to each other, when the convex portion 51 is inserted into the concave portion 23, the metal plate 50 and the spacer 20 can be prevented from contacting each other. Therefore, the electrode wiring 30 and the metal plate 50 can be easily electrically connected by using the convex portion 51 while ensuring electrical insulation between the metal plate 50 and the spacer 20.

Further, for example, the metal plate 50 is a plate body provided perpendicular to the main surfaces of the pair of

glass plates

10 and 11.

Here, since the moisture intrusion direction is a direction along the main surfaces of the glass plate 10 and the glass plate 11, the metal plate 50 is provided perpendicular to the glass plate 10 and the glass plate 11, so that the metal plate 50 is It can arrange | position so that it may cross | intersect an intrusion direction. Therefore, the intrusion of moisture can be more effectively suppressed.

Further, for example, the metal plate 50 is a substantially rectangular plate body, and each side of the metal plate 50 has a length that is substantially the same as or longer than the distance between the pair of

glass plates

10 and 11. .

Thereby, since each side of the metal plate 50 is substantially the same as the interval between the glass plate 10 and the glass plate 11 or longer than the interval, the moisture needs to bypass a route having at least the same length as the interval. Yes (see FIG. 6B). Therefore, the intrusion of moisture can be more effectively suppressed.

In the present embodiment, as shown in FIG. 6B, the recess 23 is provided near the center of the interval. For this reason, even if the metal plate 50 larger than necessary is provided, the shortest path through which moisture enters is a path along the glass plate 10 or the glass plate 11 (thick broken line in FIG. 6B). That is, even if the metal plate 50 larger than necessary is provided, the effect of suppressing the entry of moisture hardly improves.

Therefore, as in the present embodiment, the shape of the metal plate 50 (the shape when viewed in the Y-axis direction) may be a square with the interval between the glass plate 10 and the glass plate 11 as one side. Thereby, the material of the metal plate 50 can be reduced, the optical device 100 can be reduced in weight, and the cost can be reduced. Alternatively, the shape of the metal plate 50 (the shape when viewed in the Y-axis direction) may be a circle whose diameter is the distance between the glass plate 10 and the glass plate 11.

For example, the multilayer glass 1 further includes a conductive terminal 40 connected to the metal plate 50, and the electrode wiring 30 is electrically connected to the metal plate 50 by being connected to the terminal 40. ing.

Thereby, the electrical connection between the metal plate 50 and the electrode wiring 30 can be easily performed by using the terminal 40. For example, the electrode wiring 30 and the terminal 40 can be firmly physically connected by electric welding (for example, resistance welding). Similarly, the terminal 40 and the metal plate 50 can be firmly physically connected. Accordingly, the electrode wiring 30 can be prevented from being detached from the metal plate 50, and the reliability of the optical device 100 (and the multilayer glass 1) can be improved.

As described above, in the present embodiment, the lead-out wiring 60 is connected to the vicinity of the center of the metal plate 50. Since moisture easily enters along the extraction wiring 60, the moisture bypass path can be lengthened by connecting the extraction wiring 60 near the center of the metal plate 50. Therefore, the intrusion of moisture can be more effectively suppressed.

[window]
The optical device 100 (and the multilayer glass 1) described above can be used as, for example, a window of a building or a vehicle. That is, the optical device 100 can be used as a so-called smart window.

At this time, a plurality of optical devices 100 can be stacked and used as a window.

FIG. 7 is a cross-sectional view showing a window 200 including a plurality of optical devices according to the present embodiment.

As shown in FIG. 7, the window 200 includes an optical device 101, an optical device 102, an optical device 103, a sash 210, and a sash 220.

The optical device 101, the optical device 102, and the optical device 103 correspond to the optical device 100 described above. Each of the optical device 101, the optical device 102, and the optical device 103 can change different optical characteristics. That is, the optical device 101, the optical device 102, and the optical device 103 each include a different optical element 110.

The optical device 101 includes, for example, an optical element 111 that can change the light scattering property. For example, the optical element 111 is a liquid crystal element whose light scattering property can be changed. The optical device 101 switches between scattering and transmission of light according to application of a voltage. The lead wiring 61 of the optical device 101 is connected to a drive circuit or a power supply circuit (not shown) through, for example, the sash 220.

The optical device 102 includes, for example, an optical element 112 that can change light reflectivity. For example, the optical element 112 is an electrochromic element whose light reflectivity can be changed. The optical device 102 switches between reflection and transmission of light according to application of a voltage. The lead wiring 62 of the optical device 102 is connected to, for example, a drive circuit or a power supply circuit (not shown) through the sash 220.

The optical device 103 includes, for example, an optical element 113 that can emit light. For example, the optical element 113 is an organic EL element. The optical device 103 switches between lighting (light emission) and light extinction in accordance with voltage application. The lead-out wiring 63 of the optical device 103 is connected to a drive circuit or a power supply circuit (not shown) through the sash 220, for example.

The sash 210 and the sash 220 correspond to a window frame that fixes the optical device 101, the optical device 102, and the optical device 103. The sash 210 and the sash 220 are, for example, an aluminum sash.

With the above configuration, for example, by combining each of the optical device 101, the optical device 102, and the optical device 103 independently, a combination of each state (mode) of transmission, scattering, reflection, lighting, or extinction is realized. Can do. For example, in the case of transmission and light extinction, the opposite side becomes visible through the window 200, so that the window 200 can be used as a normal window. For example, in the case of reflection and lighting, the window 200 can be used as illumination.

(Modification 1)
Below, the optical device which concerns on said embodiment, and the modification 1 of multilayer glass are demonstrated.

For example, in the optical device 100 (and the multi-layer glass 1) according to the above-described embodiment, the case where the metal plate 50 has the convex portion 51 is shown, but the present invention is not limited thereto. The metal plate 50 may not have the convex portion 51.

FIG. 8 is a cross-sectional view showing a connection portion between the electrode wiring 30 and the metal plate 50A included in the optical device according to this modification. 8 corresponds to the region IV shown in FIG.

The optical device according to this modification includes a terminal 40A and a metal plate 50A instead of the terminal 40 and the metal plate 50, as shown in FIG. The metal plate 50 </ b> A is the same as the metal plate 50 except that the metal plate 50 </ b> A does not have the convex portion 51.

The terminal 40A protrudes to the metal plate 50A side through the recess 23. The terminal 40A is connected to the metal plate 50A outside the recess 23. The function and material of the terminal 40A are the same as those of the terminal 40.

Thereby, since the hollow member 21 and the metal plate 50A are separated from each other so as not to contact each other, the spacer 20 and the metal plate 50A are electrically insulated.

As described above, even when the metal plate 50A does not have the convex portion 51, the electrode wiring 30 and the metal plate 50A are electrically connected while securing the electrical insulation between the spacer 20 and the metal plate 50A. Can be connected.

(Modification 2)
Then, the optical device which concerns on said embodiment, and the modification 2 of a multilayer glass are demonstrated.

For example, although the optical device (and the multi-layer glass) according to the above-described modification example 1 has been described with respect to the case where the terminal 40 is provided, the present invention is not limited thereto. The optical device (and the multilayer glass) may not include the terminal 40.

FIG. 9 is a cross-sectional view showing a connection portion between the electrode wiring 30A and the metal plate 50A provided in the optical device according to this modification. 9 corresponds to the region IV shown in FIG.

In the optical device according to this modification, the terminal 40 is not provided as shown in FIG. The electrode wiring 30A penetrates the spacer 20 and is directly connected to the metal plate 50A. The electrode wiring 30A and the metal plate 50A are connected by, for example, electric welding.

As described above, even when the optical device (and the multi-layer glass) does not include the terminal 40, the electrode wiring 30 and the metal plate 50A are secured while ensuring the electrical insulation between the spacer 20 and the metal plate 50A. Can be electrically connected.

(Other)
As described above, the multilayer glass and the optical device according to the present invention have been described based on the above embodiment and the modifications thereof, but the present invention is not limited to the above embodiment.

For example, in the above-described embodiment, the metal plate 50 has been described as an example of the metal layer, but is not limited thereto. For example, a metal film laminated on the spacer 20 via an insulating layer may be used instead of the metal plate 50.

Further, for example, the spacer 20 and the metal plate 50 may be in contact with each other. In this case, if the spacer 20 is formed of an insulating material such as a resin material (having a lower moisture permeability than the sealing material), electrical insulation between the spacer 20 and the metal plate 50 can be ensured.

Further, for example, the spacer 20 and the metal plate 50 may be electrically connected. At this time, when a plurality of electrode wirings 30 and metal plates 50 are provided, for example, the spacers 20 may be separated so that the plurality of electrode wirings 30 are not short-circuited.

Also, for example, each side (or diameter) of the metal plate 50 may be shorter than the distance between the glass plate 10 and the glass plate 11. That is, the area may be smaller than that of the metal plate 50 according to the above embodiment. Even in the case of the metal plate 50 having a small area, moisture needs to bypass the metal plate 50, so that moisture can be prevented from entering.

For example, the metal plate 50 may be provided in the internal space 12. Specifically, the metal plate 50 may be provided so as to cover the through hole 24 of the spacer 20.

At this time, a resin material or the like is filled between the metal plate 50 and the spacer 20. In addition, the lead wiring 60 is inserted into the spacer 20 and is electrically connected to the metal plate 50. That is, the lead wiring 60 corresponds to an electrode wiring inserted into the spacer 20.

In this case as well, it is necessary for the moisture to bypass the metal plate 50 after passing through the spacer 20. Therefore, compared with the case where the metal plate 50 is not provided, the moisture intrusion path becomes longer, so that the moisture can be prevented from entering the internal space 12.

Also, for example, in the above-described embodiment, the pair of glass plates 10 and the glass plate 11 may have different shapes. For example, the glass plate 10 may be a rectangular plate, and the glass plate 11 may be a circular plate. In this case, one of the glass plate 10 and the glass plate 11 is disposed inside the other so as not to protrude outside the other in plan view.

For example, in the above-described embodiment, the example in which the optical element 110 is provided in the internal space 12 has been described, but the present invention is not limited thereto. The optical element 110 may not be provided in the internal space 12. For example, the optical device 100 may include another device (for example, a heating element such as a heater) connected to the electrode wiring 30 instead of the optical element 110.

In addition, the embodiment can be realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, or a form obtained by subjecting each embodiment to various modifications conceived by those skilled in the art. Forms are also included in the present invention.

1, 1a

Multi-layer glass

10, 11 Glass plate 20 Spacer 23

Recess

30, 30a,

30A Electrode wiring

40,

40A Terminal

50, 50A Metal plate (metal layer)
51

Convex parts

100, 100a, 101, 102, 103

Optical devices

110, 111, 112, 113 Optical elements

Claims

A pair of glass plates arranged opposite to each other;
A spacer that forms an interval between the pair of glass plates;
Electrode wiring inserted into the spacer;
A metal layer interposed between the pair of glass plates and electrically connected to the electrode wiring through a part of the spacer;
The metal layer is provided so as to cover the part of the spacer.
The multilayer glass according to claim 1, wherein the spacer is electrically insulated from the electrode wiring and the metal layer.
The metal layer has a protrusion protruding toward the spacer,
The multilayer glass according to claim 1, wherein the part of the spacer is a concave portion provided at a position facing the convex portion.
The multi-layer glass according to any one of claims 1 to 3, wherein the metal layer is a plate body provided perpendicular to a main surface of the pair of glass plates.
The metal layer is a substantially rectangular plate,
5. The multilayer glass according to claim 4, wherein each side of the metal layer has substantially the same length as the interval between the pair of glass plates or a length equal to or longer than the interval.
The multilayer glass further includes a conductive terminal connected to the metal layer,
The multilayer glass according to any one of claims 1 to 5, wherein the electrode wiring is electrically connected to the metal layer by being connected to the terminal.
An optical device comprising the multilayer glass according to any one of claims 1 to 6,
The spacer is provided in an annular shape,
The optical device is
An optical device comprising an optical element sealed by the pair of glass plates and the spacer and connected to the electrode wiring.