Vehicle window glass

Abstract

To provide a window glass for vehicle including a power receiving coil which is arranged between glass laminates.SOLUTION: A window glass for vehicle comprises: a glass laminate including, a first glass plate provided at an outdoor side of a vehicle body, a second glass plate provided at an indoor side of the vehicle body, and an intermediate membrane provided between the first glass plate and the second glass plate; a flexible substrate including, a power receiving coil for receiving power from a power transmitting coil which is provided at the indoor side of the second glass plate, and being provided between the first glass plate and the second glass plate; and a functional member which is provided between the first glass plate and the second glass plate, and receives power received on the power receiving coil.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to vehicle glazings. [Background technology]

[0002] Conventionally, automotive window glass has been available that includes first and second plies of transparent window glass material, a ply of interlayer material extending between the first and second plies, and an electrical circuit. The electrical circuit includes a first connector portion located adjacent to the ply of interlayer material, the first connector portion being configured to form a coupling area so that electrical signals in the circuit can be coupled between the coupling area and an electrical device installed on the window glass, and a second connector portion located on the surface of the second ply of window glass material, away from the interlayer material, and capable of being connected to the electrical device. The second connector portion is configured to have a core of soft magnetic material. The first connector portion forms a primary winding of an inductor, and the second connector portion forms a secondary winding of the inductor. The first connector portion, which forms the primary winding, is provided between the first and second plies of interlayer material and is made of wire or screen-printed conductor wire (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2010-509133 Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional automotive window glass does not specifically disclose how to realize a structure in which the primary winding is intersected with the intermediate layer material between the first and second plies.

[0005] Therefore, an object of the present invention is to provide a vehicle window glass including a power receiving coil that can be arranged between laminated glasses. [Means for solving the problem]

[0006] A vehicle window glass according to an embodiment of the present disclosure includes a laminated glass having a first glass sheet provided on an exterior side of a vehicle body, a second glass sheet provided on an interior side of the vehicle body, and an intermediate film provided between the first glass sheet and the second glass sheet; a flexible substrate provided between the first glass sheet and the second glass sheet, the flexible substrate having a power receiving coil that receives power from a power transmitting coil provided on the interior side of the second glass sheet; and a functional member that is provided between the first glass sheet and the second glass sheet and is supplied with power received by the power receiving coil. the functional member is provided in an upper region of the laminated glass in a plan view, an imaging unit that images a front of the vehicle body is provided in the upper region of the laminated glass in a plan view, and the functional member is an electric heating member that is provided between the first glass plate and the second glass plate in a portion of the laminated glass that is included in an imaging field of view of the imaging unit. . [Effects of the Invention]

[0007] A vehicle glazing can be provided that includes a receiver coil that can be positioned between the laminated glass. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing an example of the configuration of the front side of a vehicle 10 equipped with a vehicle window glass 100 according to an embodiment. [Figure 2] 1 is a plan view showing an example of the configuration of a vehicle window glass 100. FIG. [Figure 3] 3 is a diagram showing an example of the configuration of a cross section taken along the arrow AA of the vehicle window glass 100 in FIG. 2. FIG. [Figure 4] FIG. 2 is a diagram illustrating an example of the configuration of an FPC 120. [Figure 5] 1 is a diagram showing an example of a circuit configuration of a window glass 100 for a vehicle. [Figure 6] FIG. 2 is a diagram illustrating an example of the configuration of an FPC 130. DETAILED DESCRIPTION OF THE INVENTION

[0009] <Embodiment> Hereinafter, an embodiment to which the vehicle window glass of the present disclosure is applied will be described. For ease of understanding, the scale of each part in the drawings may differ from the actual scale. Deviations in directions such as parallel, right angle, orthogonal, up and down, left and right, etc., are allowed to the extent that they do not impair the effects of the embodiment. The shape of the corners is not limited to right angles, and may be rounded in an arched shape.

[0010] Examples of the vehicle window glass in this embodiment include a windshield (front glass) attached to the front of the vehicle, fixed side glass attached to the side of the vehicle, roof glass attached to the ceiling of the vehicle, rear glass attached to the rear of the vehicle, etc. The vehicle window glass is not limited to these examples.

[0011] <Vehicle 10 equipped with vehicle window glass 100> FIG. 1 is a diagram showing an example of the configuration of the front side of a vehicle 10 equipped with a vehicle window glass 100 according to an embodiment. The vehicle window glass 100 is attached to a body 11 of the vehicle 10 as a windshield, for example. The vehicle 10 includes a camera 20 attached to the interior side of an upper portion of the vehicle window glass 100. The camera 20 is an example of an imaging unit that captures an image of the area in front of the vehicle 10. Images acquired by the camera 20 can be used, for example, in ADAS (Advanced Driver-Assistance Systems), such as an automatic braking system or a driver assist system, or an autonomous driving system, for the vehicle 10. The vehicle 10 may also have a roof glass 11R. If the roof glass 11R is fixed, the vehicle window glass 100 may be used as the roof glass 11R.

[0012] Here, the vehicle 10 is, for example, an automobile such as an EV (Electric Vehicle), a PHEV (Plug-in Hybrid Electric Vehicle), an HV (Hybrid Vehicle), a gasoline vehicle, or a diesel vehicle. The vehicle 10 may also be a train or steam locomotive. The vehicle 10 is an example of a moving body that moves and carries passengers.

[0013] In Figure 2 and subsequent figures, an XYZ coordinate system, which is a Cartesian coordinate system, is used. The X-axis, Y-axis, and Z-axis directions represent directions parallel to the X-axis, Y-axis, and Z-axis, respectively. The X-axis, Y-axis, and Z-axis directions are perpendicular to one another. The XY plane, YZ plane, and ZX plane represent imaginary planes parallel to the X-axis and Y-axis directions, imaginary planes parallel to the Y-axis and Z-axis directions, and imaginary planes parallel to the Z-axis and X-axis directions, respectively. Planar view means viewing from an XY plane.

[0014] In this embodiment, the X-axis direction, the Y-axis direction, and the Z-axis direction respectively represent the left-right direction (lateral direction) of the vehicle window glass 100, the up-down direction (vertical direction) of the vehicle window glass 100, and the direction perpendicular to the surface of the vehicle window glass 100 (normal direction). The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to one another.

[0015] <Overall configuration of vehicle window glass 100> FIG. 2 is a plan view showing an example of the configuration of a vehicle window glass 100. FIG. 2 shows the vehicle window glass 100 as viewed from the exterior side of the vehicle body 11. In addition to the vehicle window glass 100, FIG. 2 also shows a camera 20 attached to the interior side of the upper part of 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 a plan view. The upper region is, for example, located above a driving visibility region that is within the field of view of the driver of the vehicle 10, and is an area that can be seen by the driver of the vehicle 10 by intentionally directing his or her field of view upward.

[0016] Fig. 3 is a diagram showing an example of the cross-sectional configuration of the vehicle window glass 100 in Fig. 2 taken along the line AA. In addition to the vehicle window glass 100 and the camera 20, Fig. 3 also shows a window frame 12 of a vehicle body 11. 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 is the 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.

[0017] 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. When the vehicle window glass 100 is attached to a window frame 12 formed in the vehicle body 11, the +Z-axis direction side of the vehicle window glass 100 is the exterior side of the vehicle body 11, and the -Z-axis direction side of the vehicle window glass 100 is the interior side of the vehicle body 11.

[0018] The vehicle window glass 100 is attached to the window frame 12, for example, by bonding the peripheral edge of the interior-side surface 112B of the glass plate 112 to the window frame 12 with an adhesive 30 such as urethane resin. The peripheral edge of the surface 112B is a peripheral portion of the surface 112B that is slightly inside the outer edge of the vehicle window glass 100 and extends along the outer edge. The window frame 12 has a metal portion 12A that faces at least a part of the peripheral edge, in a plan view, of the interior-side surface 112B of the glass plate 112 of the vehicle window glass 100 that is fitted into the window frame 12 from the Z-axis direction. An inner edge 12A1 of the metal portion 12A forms an opening that is covered by the vehicle window glass 100.

[0019] The vehicle window glass 100 includes a laminated glass 110, an FPC (Flexible Printed Circuit) 120, an FPC 130, and a heating wire 140. The FPC 120 has a power receiving coil 120A, and the FPC 130 has a power transmitting coil 130A. The heating wire 140 is an example of a functional member and an example of an electric heating member. The heating wire 140 heats the laminated glass 110 and prevents fogging, condensation, and the like.

[0020] 2, the FPC 120 is provided at the center in the left-right direction (X-axis direction) at the upper end (end on the +Y-axis direction side) of the laminated glass 110 in plan view, and the heating wire 140 is provided below (on the -Y-axis direction side) the FPC 120 in plan view. The heating wire 140 is provided at a position overlapping with the opening 114A1 of the ceramic layer 114 in plan view.

[0021] Here, an embodiment will be described in which an example of a functional member is the heating wire 140, but the functional member is not limited to the heating wire 140. The functional member may be any member that operates using power supplied from the vehicle 10 and performs a predetermined function, and examples of the functional member other than the heating wire 140 include a light control panel, an LCD (Liquid Crystal Display), and an OLED (Organic Light-Emitting Diode) display. A light control panel is a panel whose light transmittance changes when a voltage is applied. The position at which the functional member is arranged 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.

[0022] <Laminated Glass 110> As shown in Fig. 3, the laminated glass 110 has a glass plate 111 provided on the exterior side of the vehicle body, a glass plate 112 provided on the interior side of the vehicle body, an interlayer film 113 provided between the glass plates 111 and 112, and a ceramic layer 114. The glass plates 111 and 112 are bonded together by the interlayer film 113. The ceramic layer 114 is an example of a shielding layer.

[0023] Furthermore, an FPC 120 having a power receiving coil 120A and a heating wire 140 are provided between the glass plates 111 and 112 of the laminated glass 110. For example, the FPC 120 and the heating wire 140 are attached to a surface 112A of the glass plate 112 with an adhesive or the like, and are sandwiched between the glass plates 111 and 112 while being covered with an interlayer film 113.

[0024] Glass plate 111 is an example of a first glass plate, and glass plate 112 is an example of a second glass plate. Glass plates 111 and 112 are transparent, flat glass plates. Glass plate 111 has an exterior surface 111A and an interior surface 111B. Glass plate 112 has an exterior surface 112A and an interior surface 112B.

[0025] The glass plates 111 and 112 may be inorganic glass or organic glass. Examples of inorganic glass that can be used include, without particular limitation, soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass. Among these, soda-lime glass is particularly preferred from the viewpoints of manufacturing cost and formability. The forming method of the glass plates 111 and 112 is not particularly limited. For example, in the case of inorganic glass, glass plates formed by a float method or the like are preferred.

[0026] When the glass plates 111 and 112 are inorganic glass, they may be either untempered glass or tempered glass. Untempered glass is produced by forming molten glass into a plate shape and slowly cooling it. Tempered glass is produced by forming a compressive stress layer on the surface of untempered glass, and may be either air-cooled tempered glass or chemically tempered glass.

[0027] If the tempered glass is physically tempered glass (e.g., air-cooled tempered glass), the glass surface may be tempered by a process other than slow cooling, such as rapidly cooling a uniformly heated glass sheet from a temperature near its softening point during bending, thereby generating a compressive stress layer on the glass surface due to the temperature difference between the glass surface and the interior of the glass. If the tempered glass is chemically tempered glass, the glass surface may be tempered after bending by generating compressive stress on the glass surface using an ion exchange method or the like. Furthermore, glass that absorbs ultraviolet or infrared rays may be used as the glass sheets 111 and 112. The glass sheets 111 and 112 are preferably transparent, but may also be colored to the extent that transparency is not impaired.

[0028] The laminated glass 110 may have a curved shape such that the exterior side is convex when attached to the vehicle 10. The laminated glass 110 may have a single-curve shape bent in only one direction, or may have a compound-curve shape bent in two directions (for example, the vertical direction when the laminated glass 110 is attached to the vehicle 10 and the horizontal direction perpendicular to the vertical direction). Gravity forming, press forming, roller forming, or the like is used to bend the laminated glass 110. When the laminated glass 110 is bent to a predetermined curvature, the radius of curvature of the laminated glass 110 may be 1,000 mm or more and 100,000 mm or less.

[0029] Furthermore, when the laminated glass 110 is installed in the vehicle 10, the thickness of the glass plate 111 located on the exterior side and the thickness of the glass plate 112 located on the interior side may be the same or different. The thickness of the glass plate 111 is preferably 1.0 mm or more and 3.0 mm or less. A thickness of 1.0 mm or more of the glass plate 111 provides sufficient strength for resistance to stone chips, etc., and a thickness of 3.0 mm or less prevents the laminated glass 110 from becoming too heavy, which is preferable in terms of fuel economy of the vehicle 10. The thickness of the glass plate 112 is preferably 0.3 mm or more and 2.3 mm or less. A thickness of 0.3 mm or more of the glass plate 112 provides good handling, and a thickness of 2.3 mm or less prevents the mass from becoming too heavy. It is preferable that the thicknesses of the glass plates 111 and 112 are each 1.8 mm or less, since this allows the laminated glass 110 to achieve both lightweight and sound insulation. When the thickness of the glass plate 112 is 1.0 mm or less, the glass plate 112 may be chemically strengthened glass. When the glass plate 112 is chemically strengthened glass, it is preferable that the compressive stress value of the glass surface is 300 MPa or more, and the depth of the compressive stress layer is 2 μm or more.

[0030] When the glass plates 111 and 112 are made of organic glass, examples of the material for the organic glass include transparent resins such as polycarbonate and acrylic resins (for example, polymethyl methacrylate).

[0031] The interlayer 113 has dielectric properties and is a transparent or semi-transparent dielectric material interposed between the glass plates 111 and 112 as shown in FIG. 3. The glass plates 111 and 112 are joined by the interlayer 113. Examples of materials for the interlayer 113 include thermoplastic polyvinyl butyral (PVB) and ethylene vinyl acetate copolymer (EVA). The interlayer 113 may be transparent or colored. The interlayer 113 may also be composed of two or more layers of film.

[0032] The intermediate film 113 is disposed, for example, between the glass plates 111 and 112 in a portion where the ceramic layer 114 and the heating wire 140 are not present in a plan view. Moreover, the intermediate film 113 is disposed between the ceramic layer 114 of the glass plate 111 and the glass plate 112 in a portion where the ceramic layer 114 is present in a plan view but the FPC 120 is not present.

[0033] Furthermore, in a portion where the ceramic layer 114 and the FPC 120 are present in a plan view, the intermediate film 113 is, for example, disposed between the ceramic layer 114 of the glass plate 111 and the FPC 120, but is not disposed between the FPC 120 and the glass plate 112. Note that in a portion where the power receiving coil 120A is mounted on the FPC 120, the intermediate film 113 is disposed between the ceramic layer 114 of the glass plate 111 and the power receiving coil 120A. However, the intermediate film 113 is not limited to this configuration, and may be disposed between the ceramic layer 114 of the glass plate 111 and the FPC 120, and between the FPC 120 and the glass plate 112. Furthermore, the intermediate film 113 may be disposed between the FPC 120 and the glass plate 112, but may not be disposed between the ceramic layer 114 of the glass plate 111 and the FPC 120.

[0034] Furthermore, in the portion where the heating wire 140 is present in a plan view, the interlayer film 113 is, for example, disposed between the glass plate 111 and the heating wire 140, but is not disposed between the heating wire 140 and the glass plate 112. However, the interlayer film 113 is not limited to this configuration, and may be disposed between the glass plate 111 and the heating wire 140 and between the heating wire 140 and the glass plate 112. Furthermore, the interlayer film 113 may be disposed between the heating wire 140 and the glass plate 112, but does not necessarily have to be disposed between the glass plate 111 and the heating wire 140.

[0035] The ceramic layer 114 is, for example, a fired product of a dark-colored ceramic paste, and is formed by applying and firing a ceramic color paste containing a fusible glass frit containing a black pigment. The ceramic layer 114 is formed to prevent deterioration of the adhesive 30 due to ultraviolet rays when the vehicle window glass 100 is adhered to the vehicle 10, and to improve the appearance of the vehicle 10 by preventing the connection between the vehicle window glass 100 and the vehicle body 11 from being visible from the outside. The ceramic layer 114 is provided on the peripheral portion of the laminated glass 110 in a plan view. The peripheral 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 and follows the outer edge of the laminated glass 110 in a plan view. The peripheral portion of the laminated glass 110 is the peripheral portion of the glass sheets 111 and 112, and the outer edge of the laminated glass 110 is the outer edges 111E and 112E of the glass sheets 111 and 112.

[0036] The ceramic layer 114 is provided in one layer on the peripheral portion 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 a plan view and are also provided at the same position in a plan view. Note that 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.

[0037] Further, the ceramic layer 114 has a convex portion 114A at the center in the left - right direction above the laminated glass 110. The convex portion 114A protrudes downward from the peripheral edge of the laminated glass 110 toward the vehicle window glass 100 and is provided in a portion surrounding the camera 20 in plan view. An opening 114A1 is provided in the convex portion 114A at a position facing the front 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 view of the camera 20. The imaging field of view of the camera 20 is a range in which the camera 20 can acquire an image.

[0038] The camera 20 is attached to the glass plate 112 as shown in FIG. 3 as an example. As an example, a housing 21 is attached to the ceramic layer 114 provided on the surface 112B of the glass plate 112 via a bracket 22. The bracket 22 is, for example, rectangular - ring - shaped in plan view and is attached to the ceramic layer 114 so as to surround the opening 114A1. The bracket 22 may be attached to the ceramic layer 114 with an adhesive or the like, and the housing 21 is engaged with the bracket 22.

[0039] The left - right width of the housing 21 and the bracket 22 is narrower than the left - right width of the convex portion 114A of the ceramic layer 114, and they are attached to the glass plate 112 so as to fit within the convex portion 114A. The housing 21 has, for example, a wall portion 21A parallel to the horizontal plane and a wall portion 21B perpendicular to the wall portion 21A. The camera 20 is attached to the wall portion 21B of the housing 21 as an example so that the lens 20A faces forward of the vehicle body 11 through the opening 114A1. The housing 21 may further have wall portions at its left and right ends. Also, the housing 21 may have vent holes or the like and be connected to the interior space.

[0040] <FPC120 and Power - receiving Coil 120A> The FPC 120 is a flexible wiring board in which copper foil or the like is formed on a flexible substrate (insulating layer) made of, for example, polyimide, and has a receiving coil 120A formed by patterning a part of the copper foil. As the FPC 120, for example, a flexible board conforming to the FR4 (Flame Retardant type 4) standard can be used.

[0041] The FPC 120 having the power receiving coil 120A is sandwiched between the glass plates 111 and 112 as shown in Fig. 3. As shown in Fig. 2, the width of the FPC 120 in the left-right direction is narrower than the width of the protrusion 114A of the ceramic layer 114 in the left-right direction, and is approximately the same as the width of the heating wire 140 in the left-right direction. Here, Fig. 4 will be used for explanation in addition to Figs. 1 to 3.

[0042] FIG. 4 is a diagram illustrating an example of the configuration of the FPC 120. FIG. 4(B) shows a cross section taken along the arrow BB in FIG. 4(A). As shown in FIG. 4(B), the FPC 120 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 FPC 120, and a wiring section 120A5 and an insulating layer 122B of the power receiving coil 120A are laminated on the surface of the insulating layer 122A on the +Z-axis direction side. An insulating layer 122B is also laminated on the +Z-axis direction side of the wiring section 120A5. The wiring section 120A5 is located in an inner layer sandwiched between the insulating layers 122A and 122B. The power receiving coil 120A is formed on the surface of the insulating layer 122B and between the insulating layers 122A and 122B. The configuration of the power receiving coil 120A will be described below.

[0043] As shown in FIG. 3, the power receiving coil 120A is mounted on the surface side of the FPC 120 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 that of the power transmitting coil 130A. The power transmitting coil 130A is disposed on the −Z-axis direction side of the power receiving coil 120A. The coil shapes of the power receiving coil 120A and the power transmitting coil 130A in a plan view are, for example, the same. The power receiving coil 120A faces the power transmitting coil 130A with a gap of approximately 1 mm to approximately 3 mm in the Z-axis direction, for example.

[0044] 4(A) and 4(B), the power receiving coil 120A has a terminal 120A1, a wiring portion 120A2, a connection point 120A3, a via 120A4, a wiring portion 120A5, a via 120A6, a connection portion 120A7, a wiring portion 120A8, and a terminal 120A9. Of these, 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 located on the surface of the insulating layer 122B on the +Z-axis direction side. The wiring portion 120A5 is included in a wiring layer located inside the insulating layers 122A and 122B.

[0045] In addition, an insulating layer similar to insulating layers 122A and 122B may be further provided on the surfaces of terminal 120A1, wiring portion 120A2, connection point 120A3, connection portion 120A7, wiring portion 120A8, and terminal 120A9 on the +Z axis direction side of insulating layer 122B, or a protective layer different from insulating layers 122A and 122B may be provided, or insulating layer 122A may not be required.

[0046] Terminal 120A1 is connected to one of the two input terminals of heating wire 140. Wiring portion 120A2 is an example of a winding portion patterned in a spiral shape in a planar view between terminal 120A1 and connection point 120A3. Wiring portion 120A2 has multiple turns, and by including wiring portion 120A2, a power receiving coil 120A with multiple turns is obtained. Connection point 120A3 and wiring portion 120A5 are connected by via 120A4 that penetrates insulating layer 122B in the Z-axis direction, as shown in FIG. 4(B). Wiring portion 120A5 is an example of an intersection portion that intersects with wiring portion 120A2 in a planar view. Wiring portion 120A5 and connection portion 120A7 are connected by via 120A6 that penetrates insulating layer 122B in the Z-axis direction, as shown in FIG. 4(B). 4A, the connection part 120A7 and the terminal 120A9 are connected by a wiring part 120A8. The terminal 120A9 is connected to the other of the two input terminals of the heating wire 140.

[0047] In this way, power receiving coil 120A is wound as a coil between terminal 120A1 and terminal 120A9.

[0048] The power receiving coil 120A is electromagnetically coupled to the power transmitting coil 130A while facing the power transmitting coil 130A at a distance from the power receiving coil 130A. Therefore, the power receiving coil 120A is wirelessly fed with power from the power transmitting coil 130A using electromagnetic induction in a non-contact state with the power transmitting coil 130A. The non-contact state between the power receiving coil 120A and the power transmitting coil 130A refers to a state in which the power receiving coil 120A and the power transmitting coil 130A are not in physical contact with each other and are separated from each other. Power is supplied from the power transmitting coil 130A to the power receiving coil 120A wirelessly using electromagnetic induction. That is, the power transmitting coil 130A supplies power to the power receiving coil 120A via at least one of the glass plate 112, the intermediate film 113, and the shielding layer 114 located on the indoor side. In addition, an insulating member other than the glass plate 112, intermediate film 113, and shielding layer 114 may be interposed between the transmitting coil 130A and the receiving coil 120A, such as a resin bracket 22 for attaching the housing 21 of the camera 20, or an adhesive for attaching the bracket 22 to the shielding layer 114 of the glass plate 112 located on the indoor side.

[0049] The AC power received by the power receiving coil 120A from the power transmitting coil 130A is supplied to the heating wire 140. Therefore, the heating wire 140 generates heat using the power received by the power receiving coil 120A from the power transmitting coil 130A via wireless power supply, and can heat the glass plates 111 and 112.

[0050] Here, when the receiving coil 120A is electromagnetically coupled to the transmitting coil 130A, it means that the receiving coil 120A is not physically coupled to the transmitting coil 130A, but the receiving coil 120A can receive enough power from the transmitting coil 130A to generate heat in the heating wire 140.

[0051] The thickness of FPC 120 is the maximum thickness of the portion where power receiving coil 120A is provided, and is, for example, 0.3 mm or less, and more preferably 0.1 mm to 0.25 mm. For example, if a coil is fabricated by applying a metal paste by screen printing or the like to a rigid substrate rather than a flexible substrate, it is difficult to achieve a thickness of 0.3 mm or less.

[0052] In the vehicle window glass 100, the maximum thickness of the portion of the FPC 120 where the power receiving coil 120A is provided can be set to 0.3 mm or less, which makes it easy to sandwich the power receiving coil 120A between the glass plates 111 and 112, making it relatively easy to align the glass plates 111 and 112, and enabling sealing with the interlayer film 113. For example, if the thickness is as large as 0.5 mm, it becomes difficult to align the glass plates 111 and 112, and it becomes difficult to sandwich the power receiving coil 120A between the glass plates 111 and 112. By realizing the power receiving coil 120A using the FPC 120, a structure in which the power receiving coil 120A is sandwiched between the glass plates 111 and 112 can be realized.

[0053] Additionally, the space between the glass sheets 111 and 112 is sealed by the interlayer film 113 around the FPC 120. More specifically, the space between the ceramic layer 114 formed on the surface 111B of the glass sheet 111 and the surface 112A of the glass sheet 112 is sealed by the interlayer film 113. That is, the interlayer film 113 seals the edge surfaces (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 sheet 111 side to the flat surface of the peripheral edge of the surface 112A of the glass sheet 112. This ensures that the interlayer film 113 reliably seals the space between the glass sheets 111 and 112, thereby preventing moisture and the like from penetrating into the laminated glass 110. That is, a vehicle window glass 100 can be provided that has sufficiently high water-stopping properties at the outer edges 111E and 112E.

[0054] Here, a comparative configuration will be considered. For example, in the comparative configuration in which the FPC protrudes from portions of the outer edges 111E and 112E in a plan view, a step between the FPC and the ceramic layer 114 and a step between the FPC and the glass plate 112 are formed at the outermost portion of the interlayer film 113 in a plan view, resulting in insufficient sealing by the interlayer film 113 and the risk of moisture and the like penetrating into the laminated glass. In contrast, in the vehicle window glass 100 of the embodiment, the FPC 120 does not protrude from the outer edges 111E and 112E, and therefore there is no step at the outermost portion of the interlayer film 113 in a plan view, as in the comparative configuration, and moisture and the like can be prevented from penetrating into the laminated glass 110. In particular, the upper end side of the vehicle window glass 100 is exposed to more moisture and the like than the lower end side during rainy weather, and therefore measures to prevent moisture and the like from penetrating into the laminated glass 110 are more important. Even if the FPC 120 is sandwiched between the upper ends of the glass plates 111 and 112, the periphery of the FPC 120 can be reliably sealed with the interlayer film 113, so that the penetration of moisture and the like into the laminated glass 110 can be effectively prevented, and sufficiently high water-stopping properties can be achieved.

[0055] Furthermore, in a plan view, the FPC 120 overlaps the ceramic layer 114 provided on the peripheral edge of the surface 111B of the glass plate 111 and the ceramic layer 114 provided on the peripheral edge of the surface 112B of the glass plate 112, and is not visible from the exterior or interior sides of the vehicle window glass 100. Therefore, when the vehicle window glass 100 is attached to the vehicle body 11, the FPC 120 is not visible from the outside, and the appearance is good.

[0056] Furthermore, the FPC 120 is housed inside the outer edges 111E and 112E of the glass plates 111 and 112 in a plan view, and 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 also have a good appearance.

[0057] <Circuit Configuration of Vehicle Window Glass 100> Fig. 5 is a diagram showing an example of the circuit configuration of the vehicle window glass 100. As shown in Fig. 5, a power source 50A of the vehicle 10 is connected to a power transmitting coil 130A via a power transmitting circuit 50B. The power source 50A may be, for example, a battery that outputs DC power. Alternatively, the power source 50A may be a power source including a generator or an electric motor and a rectifier circuit that rectifies AC power generated by the generator or electric motor into DC power.

[0058] The power transmission circuit 50B is a circuit that generates AC power for transmission between the power transmission coil 130A and the power reception coil 120A from DC power output from the power supply 50A, and may be, for example, an inverter.

[0059] The AC power transmitted from the power transmitting coil 130A is received by the power receiving coil 120A by electromagnetic induction, and the heating wire 140 is connected to the output side of the power receiving coil 120A to cause the heating wire 140 to generate heat.

[0060] <Heating wire 140> The heating wire 140 is provided on the surface 112A of the glass plate 112, between the glass plates 111 and 112, at a position overlapping the opening 114A1 of the ceramic layer 114 in a plan view as shown in Fig. 2, and as shown in Fig. 3. As an example, the 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. Like the FPC 120, the heating wire 140 is housed inside the outer edges 111E and 112E of the glass plates 111 and 112. The periphery of the heating wire 140 is sealed with the interlayer 113 in a plan view.

[0061] The heating wire 140 is driven by the AC power received by the power receiving coil 120A to generate heat, and heats the portions of the glass plates 111 and 112 that are located in front of the camera 20. This prevents the laminated glass 110 from fogging up or forming condensation in front of the camera 20.

[0062] The heating wire 140 is, for example, a silver conductor formed by sintering silver paste applied to the surface 112A of the glass plate 112. The heating wire 140 may also be a conductor made of tungsten or another metal. The heating wire 140 is provided over the entire area that overlaps with the opening 114A1 of the ceramic layer 114 in a plan view. The area where the heating wire 140 is provided is the heating region that is heated by the heating wire 140. The heating wire 140 may be formed of a single wire or two or more wires. Alternatively, an electric heating film may be used as the electric heating member instead of the heating wire 140. The electric heating film is, for example, an ITO (indium tin oxide) film, and terminals 120A1 and 120A9 (see FIG. 4) of the power receiving coil 120A may be connected to the power supply electrodes of the electric heating film. Alternatively, the heating wire 140 may be a film formed by forming one or more heating wires 140 on a transparent resin film such as a PET (Polyethylene Terephthalate) film, and the film may be disposed between the glass plates 111 and 112. The heating wire 140 on the resin film can be formed by a known method using a metal such as gold, silver, copper, aluminum, or tungsten on the resin film. In this case, too, the terminals 120A1 and 120A9 of the receiving coil may be connected to the power supply electrodes of the heating wire 140 on the resin film.

[0063] As described above, the heating wire 140 is housed inside the outer edges 111E and 112E of the glass plates 111 and 112, and is sealed around the periphery by the intermediate film 113, so that together with the FPC 120, the water-tightness and appearance of the vehicle window glass 100 can be improved.

[0064] <Transmitting coil 130A and FPC 130> 6 is a diagram showing an example of the configuration of the FPC 130. Like the FPC 120, the FPC 130 is a flexible wiring board in which copper foil or the like is formed on a flexible substrate (insulating layer) made of, for example, polyimide, and has a power transmission coil 130A formed by patterning a portion of the copper foil. For example, an FR4 standard flexible board can be used as the FPC 130. A power cable 131 is connected to the FPC 130. The power cable 131 extends away from the surface of the FPC 130 on the -Z axis direction side.

[0065] 3, the FPC 130 is attached to the surface 112B of the glass plate 112. As an example, the FPC 130 may be attached to the surface 112B of the glass plate 112 using an adhesive or the like. The FPC 130 is located inside the glass plate 112 in a plan view relative to the adhesive 30. This is because the FPC 130 is located inside the interior of the vehicle body 11 relative to the adhesive 30 in a plan view, and therefore does not allow moisture or the like to enter.

[0066] As shown in Fig. 6, the power transmitting coil 130A has, for example, a configuration similar to that of the power receiving coil 120A shown in Fig. 4(A) in a plan view, and the cross-sectional configuration of the power transmitting coil 130A is, for example, similar to that of the power receiving coil 120A shown in Fig. 4(B). That is, for example, the power transmitting coil 130A is formed across the inner layer of the two insulating layers of the FPC 130 and the surface of the insulating layer on the -Z axis direction side (the surface on the -Z axis direction). The power transmitting coil 130A has two terminals 130A1 and 130A2 corresponding to the terminals 120A1 and 120A9 of the power receiving coil 120A.

[0067] The terminals 130A1 and 130A2 are connected to the power cables 131 shown in Fig. 3 via the wiring of the FPC 130. There are two power cables 131, one connected to the terminals 130A1 and one connected to the terminals 130A2. The two power cables 131 are connected to two output terminals of the power transmission circuit 50B (see Fig. 5), respectively.

[0068] 3, the power transmitting coil 130A is positioned to match the power receiving coil 120A, and therefore faces the power receiving coil 120A via the FPC 120, the glass plate 112, and the ceramic layer 114. The power transmitting coil 130A receives power from the power source 50A via the power transmitting circuit 50B, and transmits the power wirelessly to the power receiving coil 120A by electromagnetic induction.

[0069] Although the embodiment in which the power transmitting coil 130A is provided on the FPC 130 has been described above, the power transmitting coil 130A is located outside the laminated glass 110 and therefore does not necessarily have to be configured as the FPC 130. For example, a rigid substrate may be provided on the front surface 112B of the glass sheet 112, and the power transmitting coil 130A may be provided on the surface of the rigid substrate on the −Z-axis direction side. Alternatively, the power transmitting coil 130A may be formed by looping a conductive wire with an insulating coating (for example, solenoid winding, α winding, etc.). The power transmitting coil 130A may also be separated from the vehicle window glass 100. For example, the power transmitting coil 130A may be provided on a fixing member attached to the vehicle body 11 and be opposed to the power receiving coil 120A. In this way, when the power transmitting coil 130A is separated from the vehicle window glass 100, the vehicle window glass 100 does not need to include the power transmitting coil 130A as a component.

[0070] As described above, the vehicle window glass 100 has the FPC 120 having the receiving coil 120A and the heating wire 140 arranged between the glass plates 111 and 112 of the laminated glass 110, and the heating wire 140 is heated by the power received from the transmitting coil 130A arranged on the outside of the laminated glass 110.

[0071] Therefore, it is possible to provide a vehicle window glass 100 including a power receiving coil 120A that can be placed between the laminated glasses 110. If the FPC 120 is not used, the maximum thickness including the power receiving coil 120A becomes large, making it difficult to sandwich the power receiving coil 120A between the glass sheets 111 and 112. By providing the power receiving coil 120A on the FPC 120, it can be easily sandwiched between the glass sheets 111 and 112.

[0072] The power receiving coil 120A is provided across the wiring layer (terminal 120A1, wiring portion 120A2, connection point 120A3, connection portion 120A7, wiring portion 120A8, and terminal 120A9) on the surface of the insulating layer 122B of the FPC 120 and the wiring layer (wiring portion 120A5) between the insulating layers 122A and 122B. This makes it easy to realize a thin power receiving coil 120A, and in particular, a thin power receiving coil 120A with multiple turns. To heat the heating wire 140 with power received by the power receiving coil 120A from the power transmitting coil 130A via wireless power transfer, it is preferable to make the power receiving coil 120A a coil with multiple turns in order to obtain a sufficiently large magnetic flux density. By using multiple wiring layers of the FPC 120, a thin power receiving coil 120A with multiple turns can be easily realized.

[0073] Furthermore, the power receiving coil 120A includes a wiring portion 120A2 that is spirally wound in a planar view and a wiring portion 120A5 that intersects with the wiring portion 120A2 in a planar view, and the wiring portion 120A2 and the wiring portion 120A5 are provided on different wiring layers among the multiple wiring layers of the FPC 120. The FPC 120 also includes an insulating layer 122B that insulates the wiring portion 120A2 from the wiring portion 120A5. Therefore, the power receiving coil 120A can be easily realized with the spirally wound wiring portion 120A2 and the wiring portion 120A5 that intersects three-dimensionally, and a configuration can be realized in which the wiring portion 120A2 and the wiring portion 120A5 are reliably insulated by the insulating layer 122B. This configuration can easily realize a power receiving coil 120A with multiple turns.

[0074] Furthermore, the FPC 120 and the heating wire 140 are housed inside the outer edges of the glass sheets 111 and 112 in a plan view. Therefore, the FPC 120 and the heating wire 140 do not protrude from the outer edges 111E and 112E of the glass sheets 111 and 112, making it possible to provide a vehicle window glass 100 that can suppress the intrusion of moisture and the like. Furthermore, there is no component such as a flat harness that is sandwiched between the glass sheet 111 or 112 and the interlayer film 113 at the outer edges 111E and 112E, making it possible to provide a vehicle window glass 100 that can also suppress the intrusion of moisture and the like. Furthermore, because the FPC 120 and the heating wire 140 do not protrude from the outer edges 111E and 112E of the glass sheets 111 and 112, it is possible to provide a vehicle window glass 100 that has a good appearance at the outer edges 111E and 112E.

[0075] In addition, in a plan view, the glass plates 111 and 112 are sealed by the interlayer 113 around the FPC 120 and the heating wire 140. Therefore, the sealing by the interlayer 113 can effectively prevent moisture and the like from penetrating between the glass plates 111 and 112, and a vehicle window glass 100 with high watertight properties can be provided.

[0076] Furthermore, the heating wire 140 is provided in an upper region of the laminated glass 110 in plan view. The upper end side of the laminated glass 110 is more exposed to moisture and the like during rainy weather than the lower end side, and therefore water-stopping measures are more important in this area. However, the periphery of the FPC 120 and the heating wire 140 can be reliably sealed with the interlayer film 113, which effectively prevents moisture and the like from entering, thereby achieving sufficiently high water-stopping properties.

[0077] Furthermore, a camera 20 that captures an image of the area ahead of the vehicle body 11 is provided in an upper region of the laminated glass 110 in a plan view, and the heating wire 140 is provided between the glass plates 111 and 112 in a portion of the laminated glass 110 that is included in the imaging field of view of the camera 20. This makes it possible to suppress the occurrence of fogging, condensation, and the like in the portion of the laminated glass 110 that is included in the imaging field of view of the camera 20, and enables the camera 20 to capture a clear image of the area ahead of the vehicle body 11.

[0078] The laminated glass 110 has a ceramic layer 114 formed on the interior surface 111B of the glass plate 111 or the interior surface 112B of the glass plate 112, and the power receiving coil 120A is provided in a portion that overlaps with the ceramic layer 114 in a plan view. This makes it difficult to see the power receiving coil 120A from the outside of the laminated glass 110, and it is possible to provide a vehicle window glass 100 that has a good appearance.

[0079] Furthermore, since the thickness of the portion of the FPC 120 including the receiving coil 120A is 0.3 mm or less, it can be easily sandwiched between the glass plates 111 and 112, and a vehicle window glass 100 can be provided that allows for easy alignment of the glass plates 111 and 112.

[0080] The vehicle window glass 100 further includes a power transmitting coil 130A, which is provided on the interior-side surface 112B of the glass plate 112, or on a fixing member fixed to the interior-side surface 112B of the glass plate 112. This makes it easy to align the power receiving coil 120A and the power transmitting coil 130A so that they face each other, ensures strong electromagnetic field coupling, and allows for more efficient power transmission from the power transmitting coil 130A to the power receiving coil 120A. The vehicle window glass 100 also includes the power transmitting coil 130A.

[0081] While vehicle window glasses according to exemplary embodiments of the present disclosure have been described above, the present disclosure is not limited to the specifically disclosed embodiments, and various modifications and variations are possible without departing from the scope of the claims. [Explanation of symbols]

[0082] 10 vehicles 11 Body 20 Camera (an example of an imaging unit) 100, 100R vehicle window glass 110 Laminated Glass 111 Glass plate (example of the first glass plate) 111B Surface (an example of the interior surface of the first glass sheet) 111E outer edge 112 Glass plate (example of second glass plate) 112B Surface (Example of the interior surface of the second glass pane) 112E outer edge 113 Interlayer 114 Ceramic layer (an example of a shielding layer) 120 FPC (an example of a flexible substrate) 120A receiving coil 120A2 Wiring section (an example of a winding section) 120A5 Wiring section (example of intersection) 122A, 122B insulating layer 130 FPC 130A power transmission coil 140 Electric heating wire (an example of a functional component, an example of an electric heating component) 140A Dimming Panel (Example of functional component)

Claims

1. a laminated glass including a first glass plate provided on an exterior side of a vehicle body, a second glass plate provided on an interior side of the vehicle body, and an interlayer film provided between the first glass plate and the second glass plate; a flexible substrate provided between the first glass plate and the second glass plate, the flexible substrate including a power receiving coil that receives power from a power transmitting coil that is provided on the interior side of the second glass plate; a functional member provided between the first glass plate and the second glass plate, the functional member being supplied with the power received by the power receiving coil; Including, the functional member is provided in an upper region of the laminated glass in a plan view, an imaging unit that images a front area of ​​the vehicle body is provided in the upper area of ​​the laminated glass in a plan view, the functional member is an electric heating member provided between the first glass plate and the second glass plate in a portion of the laminated glass that is included in the imaging field of view of the imaging unit.

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

4. The vehicle window glass according to claim 1 , wherein the flexible substrate and the functional member are housed inside outer edges of the first glass plate and the second glass plate in a plan view.

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

6. the laminated glass has a shielding layer formed on the interior-side surface of the first glass sheet or the interior-side surface of the second glass sheet, The vehicle window glass according to claim 1 , wherein the power receiving coil is provided in a portion that overlaps with the shielding layer in a plan view.

7. The vehicle window glass according to claim 1 , wherein a thickness of the portion of the flexible substrate including the power receiving coil is 0.3 mm or less.

8. further comprising the sending coil; 8. The vehicle window glass according to claim 1, wherein the power transmission coil is provided on a surface of the second glass plate facing the interior of the vehicle, or on a fixing member fixed to the surface of the second glass plate facing the interior of the vehicle.

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