CN115723526A - Window glass for vehicle - Google Patents

Abstract

The invention provides a window glass for a vehicle, which comprises a power receiving coil capable of being configured between laminated glass. A window glass for a vehicle, comprising: a laminated glass having a1 st glass plate provided on an outdoor side of a vehicle body, a2 nd glass plate provided on an indoor side of the vehicle body, and an intermediate film provided between the 1 st glass plate and the 2 nd glass plate; a flexible substrate having a power receiving coil for receiving power from a power transmitting coil provided on the indoor side of the 2 nd glass, and provided between the 1 st glass plate and the 2 nd glass plate; and a functional member that is provided between the 1 st glass plate and the 2 nd glass plate, and that is supplied with electric power received by the power receiving coil.

Description

Window glass for vehicle

Technical Field

The present invention relates to a window glass for a vehicle.

Background

Currently, there are motor vehicle glazings comprising a1 st and a2 nd ply of transparent glazing material, a ply of interlayer material extending between the 1 st and the 2 nd ply, and an electrical circuit. The electrical circuit includes a1 st connector portion and a2 nd connector portion, the 1 st connector portion being located adjacent to the layer of interlayer material, forming a bonding region and being configured to enable bonding of an electrical signal in the electrical circuit between the bonding region and an electrical device provided on the window glass, the 2 nd connector portion being located at a position separated from the interlayer material and being located on a surface of a2 nd layer of window glass material connectable to the electrical device. The 2 nd connector portion is configured to have a core of soft magnetic material. The 1 st connector portion forms a1 st winding of the inductive element and the 2 nd connector portion forms a2 nd winding of the inductive element. The 1 st connector portion forming the 1 st winding is provided between the 1 st layer and the 2 nd layer together with an intermediate layer material, and is made of an electric wire or a screen-printed wire (see, for example, patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent application publication No. 2010-509133

Disclosure of Invention

Technical problems to be solved by the invention

However, the current window glass for an automobile does not specifically disclose how the cross structure of the 1 st winding and the like between the 1 st and 2 nd layers together with the interlayer material is realized.

Accordingly, an object of the present invention is to provide a vehicle window glass including a power receiving coil that can be disposed between laminated glasses.

Technical scheme for solving technical problem

A window glass for a vehicle according to an embodiment of the present invention includes: a laminated glass having a1 st glass plate provided on an outdoor side of a vehicle body, a2 nd glass plate provided on an indoor side of the vehicle body, and an intermediate film provided between the 1 st glass plate and the 2 nd glass plate; a flexible substrate having a power receiving coil for receiving power from a power transmitting coil provided on the indoor side of the 2 nd glass, and provided between the 1 st glass plate and the 2 nd glass plate; and a functional member that is provided between the 1 st glass plate and the 2 nd glass plate, and that is supplied with electric power received by the power receiving coil.

Effects of the invention

The present invention can provide a window glass for a vehicle including a power receiving coil that can be disposed between laminated glasses.

Drawings

Fig. 1 is a diagram showing an example of a configuration of a vehicle 10 on which a vehicle window glass 100 according to an embodiment is mounted.

Fig. 2 is a plan view showing an example of the structure of the vehicle window glass 100.

Fig. 3 isbase:Sub>A view showing an example ofbase:Sub>A configuration of anbase:Sub>A-base:Sub>A arrow section of the window glass 100 forbase:Sub>A vehicle in fig. 2.

Fig. 4 is a diagram showing an example of the configuration of the FPC120.

Fig. 5 is a diagram showing an example of a circuit configuration of the window glass 100 for a vehicle.

Fig. 6 is a diagram showing an example of the configuration of the FPC130.

Description of the symbols

10 vehicle

11 vehicle body

20 vidicon (an example of a shooting part)

100. 100R vehicle window glass

110 laminated glass

111 glass plate (1 st glass plate as an example)

111B surface (one example of the indoor side surface of the 1 st glass plate)

111E outer edge

112 glass plate (an example of 2 nd glass plate)

112B surface (an example of the indoor side surface of the 2 nd glass plate)

112E outer edge

113 intermediate film

114 ceramic layer (one example of shielding layer)

120FPC (one example of Flexible substrate)

120A power receiving coil

120A2 Wiring part (an example of a winding part)

120A5 Wiring part (an example of a crossing part)

122A, 122B insulating layer

130FPC

130A power transmission coil

140 electric heating wire (one example of functional component, one example of electric heating component)

140A light modulation board (an example of functional component)

Detailed Description

< embodiment >

Embodiments of a vehicle window glass to which the present disclosure is applied will be described below. For ease of understanding, the proportions of the parts in the figures may differ from the actual proportions. The present invention may have variations in the parallel, right-angle, orthogonal, vertical, horizontal, and other directions to such an extent that the effects of the present invention are not impaired. The corner shape is not limited to a right angle, and may be an arc shape with a circular arc.

Examples of the vehicle window glass in the present embodiment include a windshield (front window glass) attached to a front portion of a vehicle, a fixed side glass attached to a side portion of the vehicle, a roof glass attached to a roof portion of the vehicle, a rear window glass attached to a rear portion of the vehicle, and the like. The window glass for a vehicle is not limited to these examples.

< vehicle 10 with vehicle Window glass 100 mounted thereon >

Fig. 1 is a diagram showing an example of a configuration of a vehicle 10 on which a vehicle window glass 100 according to an embodiment is mounted. As one example, a window glass 100 for a vehicle is mounted as a windshield on a vehicle body 11 of a vehicle 10. The vehicle 10 includes a camera 20 mounted on an indoor side of an upper portion of a vehicle window glass 100. The camera 20 is an example of a photographing unit that photographs the front of the vehicle 10. As an example, the image acquired by the camera 20 may be used for an ADAS (advanced driving assistance system) such as an automatic braking system or a driving assistance system of the vehicle 10, an automatic driving system, or the like. Further, the vehicle 10 may have a sunroof glass 11R. When the roof glass 11R is fixed, the vehicle window glass 100 can be used as the roof glass 11R.

Here, the vehicle 10 is an automobile such as an EV (electric) vehicle, a PHEV (plug-in hybrid) vehicle, an HV (hybrid) vehicle, a gasoline vehicle, or a diesel vehicle. Further, the vehicle 10 may be an electric train (japanese automobile) or a regular power train (japanese automobile). The vehicle 10 is an example of a moving body that carries passengers for movement.

Fig. 2 uses an XYZ coordinate system as a rectangular coordinate system. The X-axis direction, the Y-axis direction, and the Z-axis direction respectively indicate a direction parallel to the X-axis, a direction parallel to the Y-axis, and a direction parallel to the Z-axis. The X-axis direction, the Y-axis direction and the Z-axis direction are orthogonal to each other. The XY plane, YZ plane, and ZX plane respectively represent an imaginary plane parallel to the X-axis direction and the Y-axis direction, an imaginary plane parallel to the Y-axis direction and the Z-axis direction, and an imaginary plane parallel to the Z-axis direction and the X-axis direction. The plan view is an XY plane.

In the present embodiment, the X-axis direction, the Y-axis direction, and the Z-axis direction respectively indicate the left-right direction (lateral direction) of the vehicle window glass 100, the up-down direction (longitudinal direction) of the vehicle window glass 100, and the direction (normal direction) perpendicular to the surface of the vehicle window glass 100. The X-axis direction, the Y-axis direction and the Z-axis direction are orthogonal to each other.

< integral constitution of Window glass 100 for vehicle >

Fig. 2 is a plan view showing an example of the configuration of the vehicle window glass 100. Fig. 2 shows a state in which the vehicle window glass 100 is viewed from the outdoor side of the vehicle body 11. Further, fig. 2 shows a camera 20 installed on the indoor side of the upper portion of the vehicle window glass 100, in addition to the vehicle window glass 100. The camera 20 is provided in the center in the left-right direction of the upper region of the vehicle window glass 100 in plan view. As one example, the upper region is a region that is located on the upper side of a driving visual field region that enters the visual field of a driver driving the vehicle 10 and that is recognizable by the driver of the vehicle 10 by intentionally directing the visual field upward.

Fig. 3 isbase:Sub>A view showing an example ofbase:Sub>A configuration of anbase:Sub>A-base:Sub>A arrow section of the window glass 100 forbase:Sub>A vehicle in fig. 2. Fig. 3 shows the window frame 12 of the vehicle body 11 in addition to the vehicle window glass 100 and the camera 20. The window frame 12 is formed in a flange shape along the outer edge of the vehicle window glass 100. The outer edge of the vehicle window glass 100 refers to an outer edge of the vehicle window glass 100 in a plan view. The outer edge of the vehicle window glass 100 is the outer edge of the laminated glass 110.

In fig. 2 and 3, the X-axis direction is the left-right direction of the vehicle 10, and the Y-axis direction is the up-down direction of the vehicle window glass 100. In a state where the vehicle window glass 100 is attached to the sash 12 formed in the vehicle body 11, the + Z-axis direction side of the vehicle window glass 100 is the outdoor side of the vehicle body 11, and the-Z-axis direction side of the vehicle window glass 100 is the indoor side of the vehicle body 11.

For example, the vehicle window glass 100 is attached to the window frame 12 by bonding the peripheral edge portion of the indoor side surface 112B of the glass plate 112 and the window frame 12 with an adhesive 30 such as urethane resin. The peripheral edge portion of the surface 112B is a peripheral portion of the surface 112B that is slightly further inward than and along the outer edge of the vehicle window glass 100. The sash 12 has a metal portion 12A facing at least a part of a peripheral edge portion in a plan view of an indoor side surface 112B of a glass plate 112 of the vehicle window glass 100 fitted into the sash 12 in the Z-axis direction. The inner edge 12A1 of the metal portion 12A forms an opening covered with the vehicle window glass 100.

The window glass 100 for a vehicle includes a laminated glass 110, an FPC (flexible printed circuit) 120, an FPC130, and an electric heating wire 140.FPC120 has power receiving coil 120A, and FPC130 has power transmitting coil 130A. The electric heating wire 140 is an example of a functional member, and is also an example of an electric heating member. The electric heating wire 140 heats the laminated glass 110 to suppress the generation of fog, dew condensation, and the like.

As shown in fig. 2, the FPC120 is provided in the center of the left-right direction (X-axis direction) of the upper end portion (+ Y-axis direction side end) of the laminated glass 110 in a plan view, and the heating wire 140 is provided below the FPC120 in a plan view (-Y-axis direction side). The heating wire 140 is provided at a position overlapping the opening 114A1 of the ceramic layer 114 in plan view.

Although the form of the electric heating wire 140 is described as an example of the functional member, the functional member is not limited to the electric heating wire 140. The functional member may be any member that operates by electric power supplied from the vehicle 10 and performs a predetermined function, and examples thereof include a light modulation panel, an LCD (liquid crystal display), an OLED (organic light emitting diode) display, and the like, in addition to the electric heating wire 140. The light modulation panel is a panel in which the transmittance of light changes when a voltage is applied. The position where the functional member is disposed on the laminated glass 110 is not limited to the position of the heating wire 140 shown in fig. 2, and the size of the functional member in a plan view may be larger than the size of the heating wire 140 shown in fig. 2.

< laminated glass 110 >

As shown in fig. 3, the laminated glass 110 includes a glass plate 111 provided on the outdoor side of the vehicle body, a glass plate 112 provided on the indoor side of the vehicle body, an interlayer 113 provided between the glass plates 111 and 112, and a ceramic layer 114. The glass plates 111 and 112 are bonded through an intermediate film 113. Ceramic layer 114 is one example of a masking layer.

Further, an FPC120 having a power receiving coil 120A and an electric heating wire 140 are provided between the glass plates 111 and 112 of the laminated glass 110. As one example, the FPC120 and the electric heating wire 140 are covered with the interlayer film 113 and sandwiched between the glass plates 111 and 112 in a state of being adhered to the surface 112A of the glass plate 112 by an adhesive or the like.

The glass plate 111 is an example of a1 st glass plate, and the glass plate 112 is an example of a2 nd glass plate. The glass plates 111 and 112 are transparent plate-like glass plates. The glass plate 111 has an outdoor side surface 111A and an indoor side surface 111B. The glass plate 112 has an outdoor side surface 112A and an indoor side surface 112B.

The glass plates 111 and 112 may be inorganic glass or organic glass. The inorganic glass is not particularly limited, and examples thereof include soda lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass. Among them, soda-lime glass is particularly preferable from the viewpoint of production cost and moldability. The method of forming the glass sheets 111 and 112 is not particularly limited. For example, in the case of inorganic glass, a glass plate formed by a float process or the like is preferable.

In the case where the glass plates 111 and 112 are inorganic glasses, the glass plates 111 and 112 may be either of non-strengthened glass or strengthened glass. The unreinforced glass is formed by forming molten glass into a plate shape and annealing the formed glass. The tempered glass is a glass in which a compressive stress layer is formed on the surface of an unreinforced glass, and may be any of air-cooled tempered glass and chemically tempered glass.

When the tempered glass is a physically tempered glass (for example, air-cooled tempered glass), the glass surface can be tempered by generating a compressive stress layer on the glass surface by utilizing a temperature difference between the glass surface and the inside of the glass, by an operation other than annealing such as rapid cooling of a glass sheet uniformly heated from a temperature near the softening point in the bending process. When the tempered glass is a chemically tempered glass, the glass surface can be tempered by applying a compressive stress to the glass surface by an ion exchange method or the like after bending. Further, as the glass plates 111 and 112, glass absorbing ultraviolet rays or infrared rays may also be used. The glass plates 111 and 112 are preferably transparent, but may be glass plates colored to such an extent that transparency is not impaired.

The laminated glass 110 may have a curved shape that is convex toward the outdoor side when mounted on the vehicle 10. The laminated glass 110 may have a single curved shape formed by bending only in 1 direction, or may have a multi-curved shape formed by bending in 2 directions (for example, the up-down direction and the left-right direction orthogonal to the up-down direction when the laminated glass 110 is mounted on the vehicle 10). The bending of the laminated glass 110 may be performed by gravity forming, press forming, roll forming, or the like. When the laminated glass 110 is bent at a predetermined curvature, the curvature radius of the laminated glass 110 may be 1000mm to 100000 mm.

When the laminated glass 110 is mounted on the vehicle 10, the thickness of the glass plate 111 located on the outdoor side and the thickness of the glass plate 112 located on the indoor side may be the same or different. The thickness of the glass plate 111 is preferably 1.0mm to 3.0 mm. If the thickness of the glass plate 111 is 1.0mm or more, the strength such as the flying stone resistance is sufficient, and if it is 3.0mm or less, the mass of the laminated glass 110 is not excessively large, which is preferable from the viewpoint of fuel efficiency of the vehicle 10. The thickness of the glass plate 112 is preferably 0.3mm to 2.3 mm. The glass plate 112 has good workability when the plate thickness is 0.3mm or more, and does not have an excessively large mass when the plate thickness is 2.3mm or less. If the thicknesses of the glass plates 111 and 112 are each 1.8mm or less, the laminated glass 110 can be reduced in weight and can be provided with sound insulation properties at the same time, and therefore, it is preferable. In addition, in the case where the thickness of the glass plate 112 is 1.0mm or less, the glass plate 112 may be chemically strengthened glass. When the glass plate 112 is a chemically strengthened glass, the value of the compressive stress on the surface of the glass is preferably 300MPa or more, and the depth of the compressive stress layer is preferably 2 μm or more.

When the glass plates 111 and 112 are made of organic glass, the material of the organic glass may be a transparent resin such as polycarbonate or acrylic resin (for example, polymethyl methacrylate).

The interlayer 113 has a dielectric property, and is a transparent or translucent dielectric interposed between the glass plates 111 and 112 as shown in fig. 3. The glass plates 111 and 112 are joined by an interlayer 113. Examples of the material of the interlayer film 113 include thermoplastic polyvinyl butyral (PVB), ethylene vinyl acetate copolymer (EVA), and the like. The intermediate film 113 may be transparent or colored. The intermediate film 113 is formed of 2 or more layers.

As an example, in a portion where the ceramic layer 114 and the heating wire 140 are not present in a plan view, the interlayer 113 is disposed between the glass plates 111 and 112. In a portion where the ceramic layer 114 is present and the FPC120 is not present in a plan view, the interlayer 113 is disposed between the ceramic layer 114 and the glass plate 112 of the glass plate 111.

In addition, as an example, in a portion where the ceramic layer 114 and the FPC120 exist in a plan view, the interlayer 113 is disposed between the ceramic layer 114 and the FPC120 of the glass plate 111 and is not disposed between the FPC120 and the glass plate 112. In the portion of the FPC120 where the power receiving coil 120A is mounted, the interlayer film 113 is disposed between the ceramic layer 114 of the glass plate 111 and the power receiving coil 120A. However, the interlayer 113 is not limited to this configuration, and may be disposed between the ceramic layer 114 and the FPC120 of the glass plate 111, or between the FPC120 and the glass plate 112. In addition, the interlayer 113 may be disposed between the FPC120 and the glass plate 112 without being disposed between the ceramic layer 114 of the glass plate 111 and the FPC120.

In addition, as an example, in a portion where the electric heating wire 140 exists in a plan view, the interlayer 113 is disposed between the glass plate 111 and the electric heating wire 140 and is not disposed between the electric heating wire 140 and the glass plate 112. However, the interlayer 113 is not limited to this configuration, and may be disposed between the glass plate 111 and the heating wire 140, or between the heating wire 140 and the glass plate 112. In addition, the interlayer 113 may be disposed between the heating wire 140 and the glass plate 112 without being disposed between the glass plate 111 and the heating wire 140.

As one example, the ceramic layer 114 is a fired body of a dark ceramic paste, which is formed by applying and firing a ceramic color paste containing a black pigment and including a meltable glass frit. The ceramic layer 114 is formed to prevent deterioration of the adhesive 30 by ultraviolet rays in a state where the vehicle window glass 100 is bonded to the vehicle 10, and to improve the appearance by making a connecting portion of the vehicle window glass 100 and the vehicle body 11 invisible from the outside of the vehicle 10. The ceramic layer 114 is provided on the peripheral edge of the laminated glass 110 in a plan view. The peripheral edge portion of the laminated glass 110 is a peripheral portion of the laminated glass 110 that is slightly inside the outer edge of the laminated glass 110 in a plan view and is along the outer edge. The peripheral edge portion of the laminated glass 110 is the peripheral edge portion of the glass plates 111 and 112, and the outer edge of the laminated glass 110 is the outer edges 111E and 112E of the glass plates 111 and 112.

A ceramic layer 114 is provided on each of peripheral portions of the indoor side surfaces 111B and 112B of the glass plates 111 and 112. As an example, the ceramic layer 114 provided on the glass plate 111 and the ceramic layer 114 provided on the glass plate 112 have the same shape in plan view and the same position in plan view. The ceramic layer 114 may be provided only on the indoor side surface 111B of the glass plate 111, or may be provided only on the indoor side surface 112B of the glass plate 112.

The ceramic layer 114 has a convex portion 114A at the center in the left-right direction of the upper portion of the laminated glass 110. The convex portion 114A protrudes downward from the peripheral edge portion of the laminated glass 110 toward the vehicle window glass 100, and is provided in a portion surrounding the periphery of the camera 20 in a plan view. The convex portion 114A is provided with an opening portion 114A1 located on the front surface of the camera 20. The opening 114A1 is a portion where the ceramic layer 114 is not formed, and is included in the imaging field of the camera 20. The shooting field of view of the camera 20 is the range in which the camera 20 can obtain images.

As an example, as shown in FIG. 3, the camera 20 is mounted to a glass plate 112. As an example, the frame body 21 is attached to the ceramic layer 114 provided on the surface 112B of the glass plate 112 via the bracket 22. As an example, the holder 22 has a rectangular ring shape in plan view, and is attached to the ceramic layer 114 so as to surround the opening 114A1. The holder 22 may be adhered to the ceramic layer 114 by an adhesive or the like, for example, and the housing 21 is engaged with the holder 22.

The width of the housing 21 and the holder 22 in the left-right direction is narrower than the width of the convex portion 114A of the ceramic layer 114 in the left-right direction, and the housing is attached to the glass plate 112 so as to be accommodated in the convex portion 114A. As an example, the enclosure 21 has a wall 21A parallel to the horizontal plane and a wall 21B perpendicular to the wall 21A. As an example, the camera 20 is attached to the wall 21B of the enclosure 21 so that the lens 20A faces the front of the vehicle body 11 through the opening 114A1. The enclosure 21 may further have a wall portion also at the left and right ends. The enclosure 21 may have a hole for ventilation and be connected to the indoor space.

< FPC120 and power receiving coil 120A >

As an example, the FPC120 is a flexible wiring substrate in which a copper foil or the like is formed on a flexible substrate (insulating layer) made of polyimide, and has a power receiving coil 120A formed by patterning a part of the copper foil. As one example, a flexible substrate of FR4 (flame retardant type 4) specification may be used as the FPC120.

As shown in fig. 3, the FPC120 having the power receiving coil 120A is sandwiched between the glass plates 111 and 112. Further, as shown in fig. 2, the width of the FPC120 in the left-right direction is narrower than the width of the convex portion 114A of the ceramic layer 114 in the left-right direction, which is substantially the same as the width of the electric heating wire 140 in the left-right direction. In addition to fig. 1-3, this document also utilizes fig. 4 for illustration.

Fig. 4 is a diagram showing an example of the configuration of the FPC120. FIG. 4 (B) shows a B-B arrow section of FIG. 4 (A). As shown in fig. 4 (B), the FPC120 is a laminated flexible substrate having insulating layers 122A and 122B. The insulating layer 122A is located on the-Z-axis direction side of the FPC120, and the wiring portion 120A5 of the power receiving coil 120A and the insulating layer 122B are stacked on the surface of the insulating layer 122A on the + Z-axis direction side. The insulating layer 122B is also stacked on the + Z-axis direction side of the wiring portion 120 A5. The wiring portion 120A5 is located in an inner layer sandwiched between the insulating layer 122A and the insulating layer 122B. The power receiving coil 120A is formed between the surface of the insulating layer 122B and the insulating layers 122A and 122B. The configuration of the power receiving coil 120A will be described below.

As shown in fig. 3, the power receiving coil 120A is attached to the surface side of the FPC120 on the + Z axis direction side, and faces the power transmitting coil 130A. The position of the power receiving coil 120A in the XY plane is aligned with the power transmitting coil 130A. The power transmission coil 130A is disposed on the-Z-axis direction side of the power reception coil 120A. As an example, the power receiving coil 120A has the same coil shape as the power transmission coil 130A in a plan view. As an example, such a power receiving coil 120A faces the power transmission coil 130A at an interval of about 1mm to about 3mm in the Z-axis direction.

As shown in fig. 4 (a) and 4 (B), the power receiving coil 120A has a terminal 120A1, a wiring portion 120A2, a connection point 120A3, a through hole 120A4, a wiring portion 120A5, a through hole 120A6, a connection portion 120A7, a wiring portion 120A8, and a terminal 120A9. Among them, the terminal 120A1, the wiring portion 120A2, the connection point 120A3, the connection portion 120A7, the wiring portion 120A8, and the terminal 120A9 are included in a wiring layer on the surface on the + Z-axis direction side of the insulating layer 122B. Further, the wiring portion 120A5 is included in a wiring layer located in an inner layer of the insulating layers 122A and 122B.

The surfaces of the terminal 120A1, the wiring portion 120A2, the connection point 120A3, the connection portion 120A7, the wiring portion 120A8, and the terminal 120A9 on the + Z axis direction side of the insulating layer 122B may be further provided with the same insulating layers as the insulating layers 122A and 122B, may be provided with a protective layer different from the insulating layers 122A and 122B, or may be free of the insulating layer 122A.

The terminal 120A1 is connected to one of 2 input terminals of the heater wire 140. The wiring portion 120A2 is an example of a winding portion patterned in a spiral shape in a plan view between the terminal 120A1 and the connection point 120 A3. The wiring portion 120A2 has a plurality of vortices, and since the wiring portion 120A2 is included, the power receiving coil 120A having a plurality of vortices can be obtained. As shown in fig. 4 (B), the connection point 120A3 and the wiring portion 120A5 are connected to each other by a through hole 120A4 penetrating the insulating layer 122B in the Z-axis direction. The wiring portion 120A5 is an example of an intersection portion that intersects with the wiring portion 120A2 in a plan view. As shown in fig. 4 (B), the wiring portion 120A5 and the connection portion 120A7 are connected to each other by a through hole 120A6 penetrating the insulating layer 122B in the Z-axis direction. As shown in fig. 4 (a), the connection portion 120A7 and the terminal 120A9 are connected by a wiring portion 120 A8. The terminal 120A9 is connected to the other of the 2 input terminals of the electric heating wire 140.

In this way, the power receiving coil 120A is wound as a coil between the terminals 120A1 and 120A9.

The power receiving coil 120A is electromagnetically coupled to the power transmission coil 130A in a state of being spaced apart from and facing the power transmission coil 130A. Therefore, the power receiving coil 120A wirelessly transmits power from the power transmission coil 130A by electromagnetic induction without contacting the power transmission coil 130A. The state in which the power receiving coil 120A and the power transmission coil 130A are not in contact means a state in which the power receiving coil 120A and the power transmission coil 130A are separated from each other without being in physical contact. The power supply from the power transmission coil 130A to the power reception coil 120A is wireless power transmission by electromagnetic induction. That is, the power transmission coil 130A supplies electric power to the power reception coil 120A through at least one of the glass plate 112, the interlayer 113, and the shielding layer 114 located on the indoor side. Further, an insulating member other than the glass plate 112, the interlayer 113, and the shielding layer 114, for example, a resin bracket 22 for mounting the housing 21 of the camera 20, an adhesive for mounting the bracket 22 on the shielding layer 114 of the glass plate 112 located on the indoor side, or the like may be interposed between the power transmission coil 130A and the power reception coil 120A.

The alternating-current power received by the power receiving coil 120A from the power transmission coil 130A is supplied to the heating wire 140. Therefore, the electric heating wire 140 can generate heat and heat the glass plates 111 and 112 by the electric power received by the power receiving coil 120A from the power transmitting coil 130A by wireless power transmission.

Herein, the power receiving coil 120A and the power transmission coil 130A are electromagnetically coupled to each other, and the power receiving coil 120A and the power transmission coil 130A are physically uncoupled from each other, but the power receiving coil 120A is in a state capable of receiving electric power from the power transmission coil 130A to such an extent that the electric heating wire 140 generates heat.

The thickness of the FPC120 is the maximum thickness of the portion where the power receiving coil 120A is provided, and is 0.3mm or less, and more preferably 0.1mm to 0.25mm as an example. For example, when a coil is produced by forming a metal paste on a rigid substrate, which is an inflexible substrate, by screen printing or the like, it is difficult to make the thickness of the coil 0.3mm or less.

In the vehicle window glass 100, since the maximum thickness of the portion of the FPC120 where the power receiving coil 120A is provided can be 0.3mm or less, it is easily sandwiched between the glass plates 111 and 112, and the alignment of the glass plates 111 and 112 is relatively easy, and it can be sealed by the interlayer film 113. For example, in the case where the thickness is thicker than 0.5mm, the positional alignment of the glass plates 111 and 112 becomes difficult, and it becomes difficult to sandwich between the glass plates 111 and 112. By realizing the power receiving coil 120A with the FPC120, a configuration in which the power receiving coil 120A is sandwiched between the glass plates 111 and 112 can be realized.

Further, around the FPC120, the space between the glass plates 111 and 112 is sealed by an interlayer 113. More specifically, the ceramic layer 114 formed on the surface 111B of the glass plate 111 and the surface 112A of the glass plate 112 are sealed by the interlayer 113. That is, the interlayer 113 seals the end surfaces (the portions of the outer edges 111E and 112E) of the laminated glass 110 by bonding the flat surface of the peripheral edge of the ceramic layer 114 on the glass plate 111 side to the flat surface of the peripheral edge of the surface 112A of the glass plate 112. Therefore, the interlayer 113 can reliably seal the space between the glass plates 111 and 112, and moisture or the like can be suppressed from entering the laminated glass 110. That is, the vehicle window glass 100 capable of obtaining sufficiently high water stopping performance in the portions of the outer edges 111E and 112E can be provided.

Here, a comparative configuration is used for discussion. For example, in a comparative configuration in which the FPC protrudes from a part of the outer edges 111E and 112E in a plan view, a step difference between the FPC and the ceramic layer 114 and a step difference between the FPC and the glass plate 112 are generated in an outermost part of the interlayer film 113 in a plan view, and the interlayer film 113 is insufficiently sealed, so that moisture or the like may enter the laminated glass. In contrast, in the vehicle window glass 100 according to the embodiment, since the FPC120 does not protrude from the outer edges 111E and 112E, there is no step in the outermost portion of the intermediate film 113 in a plan view, as in the comparative configuration, and moisture or the like can be suppressed from entering the laminated glass 110. In particular, the upper end side of the vehicle window glass 100 is exposed to more moisture or the like in rainy weather or the like than the lower end side, and therefore, it is a more important part to take measures against the moisture or the like entering the laminated glass 110. Even if the FPC120 is sandwiched between the upper end portions of the glass plates 111 and 112, the periphery of the FPC120 can be reliably sealed with the interlayer 113, so that intrusion of moisture or the like into the laminated glass 110 can be effectively suppressed, and sufficiently high water stopping property can be obtained.

In addition, the FPC120 overlaps the ceramic layer 114 provided on the peripheral edge portion of the surface 111B of the glass plate 111 and the ceramic layer 114 provided on the peripheral edge portion of the surface 112B of the glass plate 112 in a plan view, and therefore is not visible from the outdoor side and the indoor side of the vehicle window glass 100. Therefore, in a state where the vehicle window glass 100 is mounted on the vehicle body 11, the FPC120 is not visible from the outside, and the appearance is good.

Further, the FPC120 is housed at a position closer to the inside than the outer edges 111E and 112E of the glass plates 111 and 112 in a plan view, which does not protrude from the outer edges 111E and 112E of the glass plates 111 and 112. Therefore, the outer edges 111E and 112E of the vehicle window glass 100 are also good in appearance.

< Circuit configuration of Window glass 100 for vehicle >

Fig. 5 is a diagram showing an example of a circuit configuration of the window glass 100 for a vehicle. As shown in fig. 5, a power supply 50A of the vehicle 10 is connected to a power transmission coil 130A through a power transmission circuit 50B. For example, the power supply 50A may be a battery that outputs direct-current electric power. Further, the power supply 50A may be a power supply including a generator or a motor, and a rectifier circuit that rectifies alternating-current electric power generated by the generator or the motor into direct-current electric power.

The power transmission circuit 50B is a circuit for generating ac power for transmitting the dc power output from the power supply 50A between the power transmission coil 130A and the power reception coil 120A, and may use an inverter, for example.

The power of the ac power transmitted by the power transmission coil 130A is received by the power receiving coil 120A by an electromagnetic induction method, and the heating wire 140 is connected to the output side of the power receiving coil 120A, whereby the heating wire 140 generates heat.

< electric heating wire 140 >

The heating wire 140 is provided on the surface 112A of the glass plate 112 at a position overlapping the opening 114A1 of the ceramic layer 114 in a plan view as shown in fig. 2 and between the glass plates 111 and 112 as shown in fig. 3. For example, the electric heating wire 140 is slightly larger than the opening 114A1 in a plan view, and is provided on the glass plate 112 so as to include the entire opening 114A1. The electric heating wires 140 are housed in positions closer to the inner side with respect to the outer edges 111E and 112E of the glass plates 111 and 112, as with the FPC120. The periphery of the heating wire 140 is sealed by an interlayer film 113 in plan view.

The electric heating wire 140 is driven by the ac power received by the power receiving coil 120A and generates heat, heating the portions of the glass plates 111 and 112 located in front of the video camera 20. This can suppress fogging or condensation of the laminated glass 110 in front of the camera 20.

As an example, the heating wire 140 is a silver wire obtained by sintering a silver paste applied to the surface 112A of the glass plate 112. The heater wire 140 may be a wire made of tungsten or other metal. The heating wire 140 is provided so as to extend over the entire range overlapping the opening 114A1 of the ceramic layer 114 in a plan view. The range of the heating wire 140 is set as a heating region heated by the heating wire 140. The number of the electric heating wires 140 may be 1, or 2 or more. Further, an electric heating film may be used instead of the electric heating wire 140 as the electric heating member. As an example, the electric heating film is an ITO (indium tin oxide) film, and the terminal 120A1 and the terminal 120A9 (see fig. 4) of the power receiving coil 120A may be connected to the power feeding electrode of the electric heating film. In addition, as for the electric heating wire 140, a film in which 1 or more electric heating wires 140 are formed on a transparent resin film such as a PET (polyethylene terephthalate) film may be disposed between the glass plates 111 and 112. The heating wire 140 on the resin film may be formed on the resin film by a known method using a metal such as gold, silver, copper, aluminum, or tungsten. In this case, the terminals 120A1 and 120A9 of the power receiving coil may be connected to the power feeding electrodes of the heating wire 140 on the resin film.

As described above, since the electric heating wire 140 is accommodated in the inner side of the outer edges 111E and 112E of the glass plates 111 and 112 and the periphery thereof is sealed by the interlayer 113, it is possible to improve the water stopping performance and the appearance of the vehicle window glass 100 together with the FPC120.

< Power coil 130A and FPC130 >

Fig. 6 is a diagram showing an example of the configuration of the FPC130. As an example, the FPC130 is a flexible wiring substrate in which a copper foil or the like is formed on a flexible substrate (insulating layer) made of polyimide, and includes a power transmission coil 130A formed by patterning a part of the copper foil, as in the FPC120. As one example, a flexible substrate of FR4 specification may be used as the FPC130. Further, the FPC130 is connected with an electric power cable 131. The electric power cable 131 extends in a manner spaced apart from the-Z-axis direction side surface of the FPC130.

As shown in fig. 3, the FPC130 is mounted to the surface 112B of the glass plate 112. As one example, the FPC130 may be adhered to the surface 112B of the glass plate 112 using an adhesive. The FPC130 is located inside the glass plate 112 in plan view compared to the adhesive 30. This is because, if the adhesive 30 is located on the inner side in plan view, it is located in the interior of the vehicle body 11 and moisture and the like do not enter.

As shown in fig. 6, the power transmission coil 130A has, as an example, the same configuration as the power reception coil 120A shown in fig. 4 (a) in a plan view, and the cross-sectional configuration of the power transmission coil 130A is, as an example, the same as the cross-sectional configuration of the power reception coil 120A shown in fig. 4 (B). That is, as an example, the power transmission coil 130A is formed so as to straddle the inner layer of 2 insulating layers of the FPC130 and the surface of the insulating layer on the-Z axis direction side (surface on the-Z axis direction side). The power transmission coil 130A has 2 terminals 130A1 and 130A2 corresponding to the terminals 120A1 and 120A9 of the power reception coil 120A.

The terminals 130A1, 130A2 are connected to an electric power cable 131 shown in fig. 3 through the wiring of the FPC130. The electric power cable 131 has 2 cables, and 1 cable is connected to the terminals 130A1 and 130A2, respectively. The 2 electric power cables 131 are connected to 2 output terminals of the power transmission circuit 50B (see fig. 5).

Since the power transmission coil 130A is aligned with the power reception coil 120A in a plan view, the power transmission coil 130A faces the power reception coil 120A through the FPC120, the glass plate 112, and the ceramic layer 114, as shown in fig. 3. The power transmission coil 130A receives power supply from the power supply 50A through the power transmission circuit 50B, and wirelessly transmits power to the power reception coil 120A by electromagnetic induction.

Although the power transmission coil 130A is provided on the FPC130, the power transmission coil 130A is not necessarily formed of the FPC130 since it is located outside the laminated glass 110. For example, a rigid substrate may be provided on the surface 112B of the glass plate 112, and the power transmission coil 130A may be provided on the surface on the-Z axis direction side of the rigid substrate, or a lead wire with an insulating coating may be formed in a ring shape (for example, a solenoid coil, an α -coil, or the like) as the power transmission coil 130A. Further, the power transmission coil 130A may be separated from the vehicle window glass 100. For example, the power transmission coil 130A may be provided at a fixed member attached to the vehicle body 11 side so as to face the power receiving coil 120A. Therefore, when the power transmission coil 130A is separated from the vehicle window glass 100, the vehicle window glass 100 may not include the power transmission coil 130A as a component.

As described above, in the window glass 100 for a vehicle, the FPC120 having the power receiving coil 120A and the electric heating wire 140 are disposed between the glass plates 111 and 112 of the laminated glass 110, and the electric heating wire 140 generates heat by electric power received from the power transmitting coil 130A disposed outside the laminated glass 110.

Therefore, the present invention can provide a vehicle window glass 100 including a power receiving coil 120A that can be disposed between laminated glasses 110. In the case where the FPC120 is not used, the maximum thickness after including the power receiving coil 120A becomes thick, and the power receiving coil 120A is difficult to be sandwiched between the glass plates 111 and 112. By providing the power receiving coil 120A on the FPC120, it can be easily sandwiched between the glass plates 111 and 112.

The power receiving coil 120A is provided in a wiring layer (terminal 120A1, wiring portion 120A2, connection point 120A3, connection portion 120A7, wiring portion 120A8, and terminal 120A 9) crossing the surface of the insulating layer 122B of the FPC120 and a wiring layer (wiring portion 120A 5) between the insulating layers 122A and 122B. Therefore, the thin power receiving coil 120A, particularly, the power receiving coil 120A having a large number of turns and being thin can be easily realized. In order to obtain a sufficiently large magnetic flux density by causing the electric heating wire 140 to generate heat by the electric power received by the power receiving coil 120A from the power transmission coil 130A through wireless transmission, the power receiving coil 120A is preferably provided with a plurality of windings, and the power receiving coil 120A having a thin shape and a plurality of windings can be easily realized by using a plurality of wiring layers of the FPC120.

The power receiving coil 120A includes a wiring portion 120A2 wound in a spiral shape in a plan view and a wiring portion 120A5 intersecting the wiring portion 120A2 in a plan view, and the wiring portion 120A2 and the wiring portion 120A5 are provided in different wiring layers among the plurality of wiring layers of the FPC120. The FPC120 includes an insulating layer 122B that insulates the wiring portion 120A2 from the wiring portion 120 A5. Therefore, the power receiving coil 120A can be easily realized by the wiring portion 120A2 wound in a spiral shape and the wiring portion 120A5 crossing each other in a solid state, and the wiring portion 120A2 and the wiring portion 120A5 can be reliably insulated from each other by the insulating layer 122B. With this configuration, the power receiving coil 120A having a plurality of turns can be easily realized.

The FPC120 and the heater wire 140 are housed inside the outer edges of the glass plates 111 and 112 in plan view. Therefore, the FPC120 and the electric heating wire 140 do not protrude from the outer edges 111E and 112E of the glass plates 111 and 112, and the window glass 100 for a vehicle capable of suppressing intrusion of moisture or the like can be provided. Further, since there is no member such as a flat wire harness sandwiched between the glass plate 111 or 112 and the intermediate film 113 at the outer edges 111E and 112E, it is also possible to provide the window glass 100 for a vehicle capable of suppressing the intrusion of moisture or the like. Further, the FPC120 and the electric heating wire 140 do not protrude from the outer edges 111E and 112E of the glass plates 111 and 112, and therefore the window glass 100 for a vehicle in which the outer edges 111E and 112E are good in appearance can be provided.

Further, the glass plates 111 and 112 are sealed by an interlayer 113 around the FPC120 and the heating wire 140 in a plan view. Therefore, the penetration of moisture or the like between the glass plates 111 and 112 can be effectively suppressed by the sealing by the interlayer film 113, and the vehicle window glass 100 having high water-stopping property can be provided.

The heating wire 140 is provided in an upper region of the laminated glass 110 in a plan view. The upper end side of the laminated glass 110 is more important for measures against water blocking because it is exposed to more moisture or the like than the lower end side thereof in rainy weather or the like, and the interlayer 113 can reliably seal the surroundings of the FPC120 and the electric heating wire 140, so that the penetration of moisture or the like can be effectively suppressed, and sufficiently high water blocking performance can be obtained.

Further, the camera 20 that photographs the front of the vehicle body 11 is provided in an upper region of the laminated glass 110 when viewed from above, and the electric heating wire 140 is provided between the glass plates 111 and 112 in a portion thereof included in the laminated glass 110 in the photographing field of view of the camera 20. Therefore, the laminated glass 110 can suppress the occurrence of fogging or condensation in a portion included in the imaging field of view of the camera 20, and can image a clear image in front of the vehicle body 11 with the camera 20.

The laminated glass 110 has a ceramic layer 114 formed on the indoor side surface 111B of the glass plate 111 or the indoor side surface 112B of the glass plate 112, and the power receiving coil 120A is provided in a portion overlapping with the ceramic layer 114 in a plan view. Therefore, the power receiving coil 120A is less visible from the outside of the laminated glass 110, and the vehicle window glass 100 having a good appearance can be provided.

Further, since the thickness of the portion of the FPC120 including the power receiving coil 120A is 0.3mm or less, the glass plates 111 and 112 can be easily sandwiched therebetween, and the vehicle window glass 100 in which the positions of the glass plates 111 and 112 are easily aligned can be provided.

Further, the solar cell further includes a power transmission coil 130A, and the power transmission coil 130A is provided on the indoor side surface 112B of the glass plate 112 or on a fixing member fixed to the indoor side surface 112B of the glass plate 112. Therefore, it is easy to align the positions of the power receiving coil 120A and the power transmission coil 130A facing each other, and strong electromagnetic coupling can be reliably obtained, and the vehicle window glass 100 capable of transmitting power from the power transmission coil 130A to the power receiving coil 120A more effectively can be provided. Further, the vehicle window glass 100 including the configuration of the power transmission coil 130A can be provided.

Although the present disclosure has been described above with reference to the window glass for vehicles of the exemplary embodiments thereof, the present disclosure is not limited to the specifically disclosed embodiments, and various modifications and changes can be made without departing from the scope of the claims.

Claims (10)

1. A window glass for a vehicle, comprising:

a laminated glass having a1 st glass plate provided on an outdoor side of a vehicle body, a2 nd glass plate provided on an indoor side of the vehicle body, and an intermediate film provided between the 1 st glass plate and the 2 nd glass plate,

a flexible substrate having a power receiving coil for receiving power from a power transmission coil provided on the indoor side of the 2 nd glass plate, and provided between the 1 st glass plate and the 2 nd glass plate, an

A functional member that is provided between the 1 st glass plate and the 2 nd glass plate, and that is supplied with electric power received by the power receiving coil.

2. A vehicle window glass according to claim 1, wherein the power receiving coil is provided across a plurality of wiring layers of the flexible substrate.

3. The vehicle window glass according to claim 2, wherein the power receiving coil has a winding portion that is spirally wound in a plan view and an intersection portion that intersects the winding portion in a plan view, the winding portion and the intersection portion being provided in wiring layers different from each other among the plurality of wiring layers,

the flexible substrate has an insulating layer that insulates the winding portion and the intersection portion.

4. A vehicle window glass according to any one of claims 1 to 3, wherein the flexible substrate and the functional member are housed at positions that are more inward with respect to outer edges of the 1 st glass plate and the 2 nd glass plate in a plan view.

5. The window glass for a vehicle according to claim 4, wherein the 1 st glass plate and the 2 nd glass plate are sealed by the interlayer around the flexible substrate and the functional member in a plan view.

6. A vehicle window glass according to any of claims 1 to 5, wherein the functional member is provided in an upper region in the laminated glass in a plan view.

7. The window glass for a vehicle according to claim 6, wherein an imaging section for imaging the front of the vehicle body is provided in the upper region of the laminated glass in a plan view,

the functional member is an electrothermal member provided between the 1 st glass plate and the 2 nd glass plate in a portion included in an imaging field of the imaging section in the laminated glass.

8. The window glass for a vehicle as claimed in any one of claims 1 to 7, wherein the laminated glass has a shielding layer formed on a surface of the 1 st glass plate on the indoor side or a surface of the 2 nd glass plate on the indoor side,

the power receiving coil is provided in a portion overlapping with the shielding layer in a plan view.

9. The window glass for a vehicle according to any one of claims 1 to 8, wherein a thickness of a portion of the flexible substrate including the power receiving coil is 0.3mm or less.

10. The vehicle window glass of any of claims 1-9, further comprising the power transmission coil,

the power transmission coil is provided on the surface of the 2 nd glass plate on the indoor side, or is provided on a fixing member fixed to the surface of the 2 nd glass plate on the indoor side.

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