Vehicle window glass and vehicles

Abstract

The present invention provides vehicle window glass and a vehicle capable of suppressing the effects of noise caused by electronic devices used inside the vehicle or near the vehicle window glass. [Solution] A vehicle window glass 100 according to one aspect of the present invention is installed in an opening provided in the vehicle body, and a conductive film 120 is formed on at least one main surface of the vehicle window glass 100, and a high-resistance portion 130 with greater resistance than the conductive film 120 is formed around the conductive film 120.

Description

Technical Field

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[0001] The present invention relates to a vehicle window glass and a vehicle.

Background Art

[0002] [[ID=I2]]In recent years, the development of vehicle window glass with an antenna disposed in the vicinity has been underway. For example, Patent Document 1 discloses a technique for disposing an antenna in the vicinity of vehicle window glass while ensuring antenna gain.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Various electronic devices are disposed inside the vehicle or in the vicinity of the vehicle window glass. An electronic device is a device controlled by an electrical signal. Therefore, when an electronic device is used inside the vehicle, noise caused by the electronic device may occur and may affect an antenna disposed in the vicinity of the vehicle window glass.

[0005] In view of the above problems, an object of the present invention is to provide a vehicle window glass and a vehicle capable of suppressing the influence of noise caused by electronic devices used inside the vehicle or in the vicinity of the vehicle window glass.

Means for Solving the Problems

[0006] The vehicle window glass and the vehicle according to one aspect of the present disclosure have the following configuration.

[0007] [1] A vehicle window glass attached to an opening provided in a vehicle body, A conductive film is formed on at least one main surface of the aforementioned vehicle window glass. A high-resistance portion with greater resistance than the conductive film is formed around the conductive film. Vehicle window glass.

[0008] [2] The conductive film has a sheet resistance of 5Ω / sq. or less. The aforementioned high-resistance portion has a sheet resistance of 10Ω / sq. or more. [1] Vehicle window glass as described above.

[0009] [3] The width of the high-resistance portion is 11.5 mm or more, and the sheet resistance of the high-resistance portion is 12 Ω / sq. or more. Vehicle window glass as described in [1] or [2].

[0010] [4] The width of the high-resistance portion is 9 mm or more, and the sheet resistance of the high-resistance portion is 40 Ω / sq. or more. Vehicle window glass as described in [1] or [2].

[0011] [5] The high-resistance portion has a higher sheet resistance as it moves toward the outer periphery of the vehicle window glass. Vehicle window glass as described in [1] to [4].

[0012] [6] The conductive film is an ITO film. Vehicle window glass as described in any of [1] to [5].

[0013] [7] The conductive film is a transparent conductive film containing silver. Vehicle window glass as described in any of [1] to [5].

[0014] [8] The vehicle window glass is a laminated glass having a first glass plate with a first major surface and a second major surface, a second glass plate with a third major surface and a fourth major surface, an intermediate film positioned between the second major surface and the third major surface, and a functional element positioned between the second major surface and the third major surface and contacting the intermediate film. The functional element has a functional layer and a conductive member disposed in proximity to the functional layer. The high-resistance portion is provided so as to surround the conductive member in a plan view. The vehicle window glass according to any one of [1] to [7].

[0015] [9] The functional element is either a dimming element or a photovoltaic element, and the vehicle window glass according to [8].

[0016]

[10] The vehicle window glass is a laminated glass having a first glass plate with a first major surface and a second major surface, a second glass plate with a third major surface and a fourth major surface, and an intermediate film positioned between the second major surface and the third major surface. The conductive films are respectively formed on the second major surface and the fourth major surface. The high-resistance portion is provided so as to surround both the conductive film formed on the second major surface and the conductive film formed on the fourth major surface in a plan view. The vehicle window glass according to any one of [1] to [9].

[0017]

[11] The opening in which the vehicle window glass is installed is formed by a conductive frame member provided on the vehicle body. The high-resistance portion at least partially overlaps with the frame member in a plan view. The vehicle window glass according to any one of [1] to

[10] .

[0018]

[12] A shielding layer is provided at an edge portion of the vehicle window glass. The high-resistance portion at least partially overlaps with the shielding layer in a plan view. Vehicle window glass as described in any of [1] to

[11] .

[0019]

[13] The high-resistance portion is provided in a portion of the entire circumference of the conductive film that is 36% or more. Vehicle window glass as described in any of [1] to

[12] .

[0020]

[14] A vehicle equipped with a vehicle window glass as described in any of [1] to

[13] . [Effects of the Invention]

[0021] The present invention provides a vehicle window glass and a vehicle that can suppress the effects of noise caused by electronic devices used inside the vehicle or near the vehicle window glass. [Brief explanation of the drawing]

[0022] [Figure 1] This is a schematic front view showing an example of the vehicle configuration according to Embodiment 1. [Figure 2] This is a schematic cross-sectional view along line II-II in Figure 1. [Figure 3] This is a schematic cross-sectional view showing an example of the vehicle configuration according to Embodiment 2. [Figure 4] This is a schematic front view showing an example of the vehicle configuration according to Embodiment 3. [Figure 5] This is a schematic front view showing an example of the vehicle configuration according to Embodiment 4. [Figure 6] This is a schematic cross-sectional view showing an example of the vehicle configuration according to Embodiment 5. [Figure 7] This is a schematic cross-sectional view showing an example of the vehicle configuration according to Embodiment 6. [Figure 8] This graph shows the relationship between frame width and radiated electric field strength. [Figure 9] This graph shows the relationship between frame width and radiated electric field strength, and the relationship between frame width and sheet resistance. [Figure 10] This graph shows the relationship between frame width and radiated electric field strength, and the relationship between frame width and sheet resistance. [Figure 11] This graph shows the relationship between the proportion of high-resistance regions formed and the radiated electric field strength. [Figure 12] This graph shows the relationship between the distance between the high-resistance region and the conductive film, and the radiated electric field strength. [Figure 13] This is a schematic cross-sectional view showing a modified example of the vehicle according to Embodiment 1. [Figure 14] This is a schematic cross-sectional view showing a modified example of the vehicle according to Embodiment 1. [Figure 15] This is a schematic cross-sectional view showing a modified example of the vehicle according to Embodiment 1. [Figure 16] This is a schematic cross-sectional view showing a modified example of the vehicle according to Embodiment 1. [Modes for carrying out the invention]

[0023] Embodiments of the present invention will now be described with reference to the drawings. In each drawing, the same or corresponding elements are denoted by the same reference numerals, and redundant explanations are omitted as necessary for clarity of explanation. In this specification, the "~" indicating a numerical range includes the numbers written before and after it as the lower and upper limits.

[0024] <Embodiment 1> Figure 1 is a schematic front view showing an example of the configuration of a vehicle 10 according to Embodiment 1. As shown in Figure 1, the vehicle window glass 100 comprises a glass plate 110, a conductive film 120, and a high-resistance portion 130. The vehicle window glass 100 is installed in an opening formed by a conductive frame material 11 provided on the body of the vehicle 10.

[0025] Figure 2 is a schematic cross-sectional view along the line II-II shown in Figure 1. As shown in Figure 2, the vehicle window glass 100 is installed in an opening formed by a conductive frame material 11 provided on the body of the vehicle 10. In the example shown in Figure 2, a flange 12 is provided on the edge of the opening in the frame material 11, and the vehicle window glass 100 is bonded to the frame material 11 by an adhesive member 13 placed on the flange 12. The vehicle 10 may also have an antenna (not shown) near the vehicle window glass 100.

[0026] (Glass plate) Returning to Figure 1, let's continue the explanation. In Embodiment 1, the glass plate 110 is a single sheet of glass. The type of glass that makes up the glass plate 110 is not particularly limited. The glass plate 110 may be inorganic glass such as soda lime silicate glass, aluminosilicate glass, alkali-free glass, and borosilicate glass, or it may be organic glass such as polycarbonate sheet and acrylic resin sheet. The glass plate 110 may be colorless glass such as clear glass, or colored glass such as privacy glass. The glass plate 110 may also be tempered glass such as physically tempered glass or chemically tempered glass. Tempered glass may be, for example, made by forming a compressive stress layer on the surface of untempered glass.

[0027] (Conductive film) The conductive film 120 is a film constructed using a conductive material. The conductive film 120 is placed on at least one of the main surfaces of the glass plate 110. Examples of conductive films 120 include a heat-reflective film, a low-emission film, and a heat-generating film. In the example shown in Figure 1, the conductive film 120 is rectangular, but the shape of the conductive film 120 is not particularly limited. The conductive film 120 usually has a sheet resistance of 5 Ω / sq. or less.

[0028] The heat-reflective film suppresses the rise in temperature inside the vehicle and inhibits the thermal degradation of various components by selectively reflecting infrared rays. The heat-reflective film may be a multilayer film composed of multiple layers. For example, the heat-reflective film may have a configuration in which at least one of the multiple layers contains an infrared-reflective material. The infrared-reflective material is a material that reflects infrared rays and may be, for example, a transparent conductive oxide such as silver (Ag), indium tin oxide, or zinc oxide, fluorine-doped tin oxide, or any other suitable material that shields a considerable amount of infrared radiation. The heat-reflective film may have a configuration in which, for example, a dielectric layer (dielectric layer) and an Ag layer (Ag layer) are included. The derivative may be, for example, silicon nitride, titanium oxide, silicon oxynitride, tin oxide, other types of metal (alloy) oxides, or other types of metal (alloy) nitrides. Examples of other types of metal oxides include zinc-tin oxide, aluminum zinc oxide, nickel-chromium oxide, silver oxide, and zinc oxide. The heat-reflective film may, for example, consist of an Ag layer sandwiched between at least one pair of dielectric layers. Alternatively, the heat-reflective film may contain multiple Ag layers. In this case, from the viewpoint of exhibiting sufficient infrared reflection performance and suppressing manufacturing costs, it is preferable that the heat-reflective film contains two or three Ag layers.

[0029] The Low-E film is, for example, provided on the inner surface of a glass plate 110, and is a low-emissivity film comprising a transparent conductive layer and a reflection-adjusting layer in order from the glass plate 110 side. The transparent conductive layer is preferably an ITO layer, a tin oxide layer, a fluorine-doped tin oxide layer, an antimond-doped tin oxide layer, a silver layer, a zirconium nitride layer, or a titanium nitride layer. The transparent conductive layer may also contain additives. If the transparent conductive layer is an ITO layer, the additives may be, for example, Ga, Zn, Al, and / or Nb.

[0030] The heating film is a transparent or translucent conductor, and examples include a metal film such as an Ag film, a metal oxide film such as an indium tin oxide (ITO) film, a resin film containing conductive fine particles, or a laminate of multiple types of films. The heating film is a conductive film that, for example, heats the glass plate 110 by causing a current to flow through the heating film when a DC voltage is applied between a pair of busbars (not shown), thereby enabling snow melting, ice melting, and anti-fogging of the glass plate 110.

[0031] (High resistance part) As shown in Figure 1, the high-resistance portion 130 is formed around the conductive film 120 in a plan view. This configuration suppresses noise caused by electronic devices such as electronic equipment placed inside the vehicle and functional elements attached to the vehicle window glass 100. As a result, an antenna (not shown) placed near the vehicle window glass 100 becomes less susceptible to the effects of such noise. The high-resistance portion 130 may be provided so as to be in contact with the conductive film 120 in a plan view. Alternatively, a gap may be provided between the high-resistance portion 130 and the conductive film 120. The gap may be, for example, 2 mm or less.

[0032] The high-resistance portion 130 is provided, for example, in a portion of the outer circumference of the conductive film 120 that is 36% or more, with a width greater than or equal to a predetermined value. In the example shown in Figure 1, the high-resistance portion 130 is formed to surround the entire circumference of the conductive film 120 with a constant width. In other words, in the example shown in Figure 1, the inner edge of the high-resistance portion 130 is formed to follow the entire outer edge of the conductive film 120. The width of the high-resistance portion 130 is the dimension of the high-resistance portion 130 in a direction perpendicular to the edge, starting from a point on the edge of the high-resistance portion 130 that is closest to the conductive film 120.

[0033] The high-resistance portion 130 is a film made of a conductive material. The high-resistance portion 130 has a higher sheet resistance than the conductive film 120. Typically, the sheet resistance of the high-resistance portion 130 is 10 Ω / sq. or higher. The high-resistance portion 130 may be made of the same material as the conductive film 120, or it may be made of a different material. For example, the high-resistance portion 130 may be formed by coating the main surface of the glass plate 110 with the material that constitutes the conductive film 120 to a thickness that yields a desired sheet resistance.

[0034] From the standpoint of further suppressing noise, the high-resistance portion 130 may overlap with the frame material 11 in a plan view, at least in part. In the example shown in Figure 2, the high-resistance portion 130 partially overlaps with the flange 12 provided on the frame material 11 in a plan view.

[0035] The width and sheet resistance of the high-resistance portion 130 may be determined according to the frequency band of the noise to be suppressed. For example, if the frequency band of the noise to be suppressed is the 1.7GHz band (Band III) used in communication lines for smartphones, the high-resistance portion 130 may be formed to have a width of 11.5mm or more and a sheet resistance of 12Ω / sq. or more. If the frequency band of the noise to be suppressed is 50MHz to 1GHz, the high-resistance portion 130 may be formed to have a width of 9mm or more and a sheet resistance of 40Ω / sq. or more.

[0036] The thickness of the high-resistance portion 130 may decrease towards the outer periphery of the vehicle window glass 200. That is, the sheet resistance of the high-resistance portion 130 may increase towards the outer periphery of the vehicle window glass 200. The thickness of the high-resistance portion 130 may decrease linearly, for example, as shown in Figure 13, or exponentially, as shown in Figures 14 and 15, or in a stepped manner, as shown in Figure 16.

[0037] <Embodiment 2> Figure 3 is a schematic cross-sectional view showing an example of the configuration of a vehicle window glass 200 in a vehicle 20 according to Embodiment 2. The vehicle window glass 200 according to Embodiment 2 differs from the vehicle window glass 100 in that it is laminated glass. Other configurations are the same, so redundant explanations will be omitted as appropriate.

[0038] The vehicle window glass 200 is a laminated glass comprising a first glass plate 210, a second glass plate 220, an interlayer 230, and a functional element 240. The vehicle window glass 200 has a conductive film 120 and a high-resistance portion 130 formed on the main surface facing the vehicle. When the vehicle window glass 200 is installed in the vehicle 20, the first glass plate 210 is positioned on the outside of the vehicle and the second glass plate 220 is positioned on the inside of the vehicle. Here, the main surface facing the outside of the vehicle of the first glass plate 210 is referred to as the first main surface, and the main surface facing the inside of the vehicle is referred to as the second main surface. The main surface facing the outside of the vehicle of the second glass plate 220 is referred to as the third main surface, and the main surface facing the inside of the vehicle is referred to as the fourth main surface. Hereinafter, the first glass plate 210 and the second glass plate 220 may be collectively referred to as glass plates 210 and 220.

[0039] The interlayer 230 is located between the second main surface and the third main surface. The functional element 240 is located between the second main surface and the third main surface and is in contact with the interlayer 230. The functional element 240 may be placed, for example, between two interlayers 230. When the functional element 240 is placed between two interlayers 230, the two interlayers 230 may be in contact with each other at the end side of the vehicle window glass 200, as shown in Figure 3. The conductive film 120 and the high-resistance portion 130 are placed on at least one of the second main surface, the third main surface, and the fourth main surface. In Embodiment 2, the conductive film 120 and the high-resistance portion 130 are placed on the fourth main surface. The vehicle window glass 200 according to Embodiment 2 has, for example, a first glass plate 210, an interlayer 230, a functional element 240, an interlayer 230, a second glass plate 220, and a conductive film 120 in this order, as shown in Figure 3.

[0040] Glass plates 210 and 220 are glass plates that constitute laminated glass. The type of glass that makes up glass plates 210 and 220 is not particularly limited. The glass that makes up glass plates 210 and 220 may be the same as or different from each other.

[0041] The interlayer 230 is composed of, for example, a transparent resin. Examples of resins that make up the interlayer 230 include polyvinyl butyral (PVB), polyvinyl chloride, ethylene vinyl acetate (EVA), cycloolefin polymer, urethane resin, polyvinylidene fluoride resin (PVDF), etc. The interlayer 230 may be colorless or colored. The interlayer 230 may be colored by, for example, being composed of a resin containing a coloring agent such as a pigment.

[0042] The functional element 240 is a film-like element that operates by an electrical signal. The functional element 240 is, for example, a dimming element or a photocell element. Figure 3 illustrates one configuration example where the functional element 240 is a dimming element. In the example shown in Figure 3, the functional element 240 is a dimming element comprising a functional layer 241, conductive members (conductive thin films) 242, 243, and substrates 244, 245. In the functional element 240, the functional layer 241 is arranged in close proximity to the conductive members (conductive thin films) 242, 243.

[0043] The functional layer 241 is sandwiched in the thickness direction of the vehicle window glass 200 by a pair of conductive thin films 242 and 243. The functional layer 241 is a liquid crystal layer whose orientation is controlled by applying a voltage between the conductive thin films 242 and 243. Examples of liquid crystals that constitute the functional layer 241, which functions as a light-adjusting layer, include TN (Twisted Nematic) liquid crystals, VA (Vertical Alignment) liquid crystals, polymer dispersed liquid crystals (PDLC), suspended particle devices (SPD), polymer network liquid crystals (PNLC), and guest-host liquid crystals (GHLC). Other materials such as electrochromic materials and photochromic materials can also be used.

[0044] The conductive thin films 242 and 243 are layers constructed using conductive materials. Examples of materials that make up the conductive thin films 242 and 243 include indium tin oxide (ITO), tin oxide, fluorine-doped tin oxide, antimond-doped tin oxide, silver, zirconium nitride, and titanium nitride.

[0045] The photovoltaic element used as the functional element 240 is not particularly limited. The photovoltaic element may be, for example, an element that constitutes a perovskite solar cell, an organic thin-film solar cell, a silicon-based solar cell, a CIGS solar cell, etc.

[0046] In the vehicle window glass 200, the functional element 240 can be a source of noise. However, in the vehicle window glass 200, the high-resistance portion 130 is formed around the conductive film 120, so the effect of noise is suppressed.

[0047] <Embodiment 3> Figure 4 is a schematic front view showing an example of the configuration of a vehicle 30 according to Embodiment 3. The vehicle window glass 300 according to Embodiment 3 differs from the vehicle window glass 100 shown in Figure 1, etc., in that the high-resistance portion 330 is formed only on a part of the periphery of the conductive film 120. Other configurations are the same, so redundant explanations will be omitted as appropriate. In the vehicle window glass 300, the high-resistance portion 330 is formed on more than 36% of the outer circumference of the conductive film 120 with a predetermined width and sheet resistance. Therefore, it has the same effect as the vehicle window glass 100.

[0048] <Embodiment 4> Figure 5 is a schematic front view showing an example of the configuration of a vehicle 40 according to Embodiment 4. The vehicle window glass 400 according to Embodiment 4 differs from the vehicle window glass 100 shown in Figure 1, etc., in that a high-resistance portion 430 with a predetermined width or greater is formed on a part of the periphery of the conductive film 120, and a high-resistance portion 430 with a width less than the predetermined is formed on the other parts. Other configurations are the same, so redundant explanations will be omitted as appropriate. In the vehicle window glass 400, the high-resistance portion 430 is formed with a predetermined width or greater and sheet resistance on 36% or more of the outer periphery of the conductive film 120. Therefore, it has the same effect as the vehicle window glass 100.

[0049] <Embodiment 5> Figure 6 is a schematic cross-sectional view showing an example of the configuration of a vehicle 50 according to Embodiment 5. The vehicle window glass 500 according to Embodiment 5 differs from the vehicle window glass 100 shown in Figure 1, etc., in that it has a shielding layer 550. Other configurations are the same, so redundant explanations will be omitted as appropriate. The vehicle window glass 500 has a high-resistance portion 130 formed around the conductive film 120, and therefore provides the same effect as the vehicle window glass 100.

[0050] The shielding layer 550 is a dark, opaque layer that forms a shielding region on the edge of the vehicle window glass 500 in a plan view. The shielding layer 550 is a dark ceramic layer, commonly referred to as "black ceramic," that shields at least a portion of sunlight. The shielding layer 550 is formed, for example, by applying a printing ink containing a heat-resistant dark pigment, low-melting-point glass powder, resin, and solvent to a predetermined location and then baking it. As shown in Figure 6, from the viewpoint of enhancing aesthetics, at least a portion of the high-resistance portion 130 may overlap with the shielding layer 550 in a plan view, and preferably the entire high-resistance portion 130 overlaps with the shielding layer 550 in a plan view. However, the high-resistance portion 130 does not necessarily have to overlap with the shielding layer 550 in a plan view.

[0051] <Embodiment 6> Figure 7 is a schematic cross-sectional view showing an example of the configuration of a vehicle 60 according to Embodiment 6. The vehicle window glass 600 according to Embodiment 6 differs from the vehicle window glass 200 shown in Figure 3 in that it has a second conductive film 660 on its second main surface. Other configurations are the same, so redundant explanations will be omitted as appropriate. In the vehicle window glass 600, for example, the second conductive film 660 on the second main surface may be a heat-reflective film, and the conductive film 120 arranged on the fourth main surface may be a Low-E film. The high-resistance portion 130 is formed to surround both the conductive film 120 and the second conductive film 660 in a plan view. Therefore, the vehicle window glass 600 has the same effect as the vehicle window glass 100. [Examples]

[0052] Next, embodiments of the present invention will be described. Examples 1 to 5 are examples. As a model for simulating the radiated electric field strength, a model was prepared in which glass was attached to a plate using the following method. The plate has a rectangular opening in the center, and glass is attached to this opening.

[0053] <Glass composition> The glass was a square pane with sides measuring 520 mm. It was a single-pane glass with a conductive film formed in the center, each side measuring 450 mm. The sheet resistance of the conductive film was 0 Ω / sq.

[0054] <Plate configuration> A flange was formed around the edge of the opening in the plate. The flange was 15 mm wide. The adhesive used to bond the glass to the plate was a urethane-based adhesive. The adhesive was positioned 5 mm inward from the edge of the flange. The adhesive was 5 mm wide. The glass was positioned so that it overlapped the flange by 10 mm in a plan view.

[0055] <Example 1> The radiated electric field strength was simulated when a conductive film was formed on the main surface of glass, with high-resistance sections of various frame widths surrounding it, and power was supplied to the conductive film. The sheet resistance of the high-resistance section was 15 Ω / sq. The average value of the radiated electric field strength in the Band III frequency band was calculated and is shown in Figure 8. The maximum value of the radiated electric field strength without the high-resistance section was set to 0 dB. As shown in Figure 8, when the sheet resistance of the high-resistance section was 15 Ω / sq., the radiation from the conductive film could be reduced by about 3 dB if the frame width of the high-resistance section was 8 mm or more. Furthermore, it was confirmed that the radiation from the conductive film could be reduced even further when the frame width of the high-resistance section was 25 mm or more, i.e., when a part of the high-resistance section overlapped with the flange in a plan view.

[0056] <Example 2> The relationship between the lowest radiated electric field and the frame width of the high-resistance portion in the Band III frequency band is shown by the dashed line in Figure 9. Here, the lowest radiated electric field is the sum of the sensitivity reduction due to sheet resistance and the sensitivity reduction caused by the expansion of the conductive film region. Specifically, the sensitivity reduction due to sheet resistance is obtained by plotting the value of the radiated electric field that first reached its lowest value in the simulation results when the sheet resistance is varied while the frame width of the high-resistance portion is fixed. Furthermore, the relationship between the sheet resistance that yields the lowest radiated electric field and the frame width of the high-resistance portion in the Band III frequency band is shown by the solid line in Figure 9. As shown in Figure 9, in the Band III frequency band, if the frame width of the high-resistance portion is 11.5 mm or more and the sheet resistance of the high-resistance portion is 12 Ω / sq. or more, it was possible to reduce the radiation from the conductive film by 3 dB or more.

[0057] <Example 3> The relationship between the lowest radiated electric field and the frame width of the high-resistance portion in the 50MHz to 1GHz frequency band is shown by the dashed line in Figure 10. Furthermore, the relationship between the sheet resistance that yields the lowest radiated electric field and the frame width of the high-resistance portion in the 50MHz to 1GHz frequency band is shown by the solid line in Figure 10. As shown in Figure 10, in the 50MHz to 1GHz frequency band, setting the frame width of the high-resistance portion to 9mm or more and the sheet resistance of the high-resistance portion to 40Ω / sq. or more made it possible to reduce radiation from the conductive film by 3dB or more.

[0058] <Example 4> Figure 11 shows the results of a simulation of the change in radiated electric field strength when the high-resistance portion is shaved away from the side of the conductive film facing the power supply portion, with a frame width of 20 mm and a sheet resistance of 15 Ω / sq. in the high-resistance portion. As shown in Figure 11, if the high-resistance portion is provided in more than 36% of the circumference of the conductive film, it was possible to reduce the radiation from the conductive film by more than 3 dB.

[0059] <Example 5> Figure 12 shows the results of a simulation of the change in radiated electric field strength when the distance between the high-resistance portion and the conductive film is changed. As shown in Figure 12, when the distance between the high-resistance portion and the conductive film is 2 mm or less, it was possible to reduce the radiation from the conductive film by more than 3 dB compared to when no high-resistance portion is formed.

[0060] Although the present invention has been described above in accordance with the above embodiments, the present invention is not limited to the configuration of the above embodiments, and of course includes various modifications, alterations, and combinations that can be made by a person skilled in the art within the scope of the claims of the present patent application. [Explanation of Symbols]

[0061] Vehicles 10, 10a, 10b, 10c, 10d, 20, 30, 40, 50, 60 11 Frame material 12 flanges 13 Adhesive members 100, 100a, 100b, 100c, 100d, 200, 300, 400, 500, 600 Vehicle window glass 110 Glass plate 120 Conductive film 130,130a,130b,130c,130d,330,430 High resistance part 210 First glass plate 220 Second glass plate 230 Interlayer 240 Functional Elements 241 Functional Layers 242,243 Conductive materials (conductive thin films) 244,245 Base material 550 Shielding layer

Claims

1. A vehicle window glass that is installed in an opening provided in the vehicle body, A conductive film is formed on at least one main surface of the aforementioned vehicle window glass. A high-resistance portion with greater resistance than the conductive film is formed around the conductive film. Vehicle window glass.

2. The conductive film has a sheet resistance of 5 Ω / sq. or less. The aforementioned high-resistance portion has a sheet resistance of 10 Ω / sq. or more. Vehicle window glass according to claim 1.

3. The width of the high-resistance portion is 11.5 mm or more, and the sheet resistance of the high-resistance portion is 12 Ω / sq. or more. Vehicle window glass according to claim 1 or 2.

4. The width of the high-resistance portion is 9 mm or more, and the sheet resistance of the high-resistance portion is 40 Ω / sq. or more. Vehicle window glass according to claim 1 or 2.

5. The high-resistance portion has a higher sheet resistance as it moves toward the outer periphery of the vehicle window glass. Vehicle window glass according to claim 1 or 2.

6. The conductive film is an ITO film. Vehicle window glass according to claim 1 or 2.

7. The conductive film is a transparent conductive film containing silver. Vehicle window glass according to claim 1 or 2.

8. The aforementioned vehicle window glass is a laminated glass comprising: a first glass plate having a first main surface and a second main surface; a second glass plate having a third main surface and a fourth main surface; an interlayer located between the second main surface and the third main surface; and a functional element located between the second main surface and the third main surface and in contact with the interlayer. The functional element comprises a functional layer and a conductive member disposed in close proximity to the functional layer. The high-resistance portion is provided so as to surround the conductive member in a plan view. Vehicle window glass according to claim 1 or 2.

9. The vehicle window glass according to claim 8, wherein the functional element is either a dimming element or a photovoltaic element.

10. The aforementioned vehicle window glass is a laminated glass comprising a first glass plate having a first main surface and a second main surface, a second glass plate having a third main surface and a fourth main surface, and an interlayer located between the second main surface and the third main surface. The conductive film is formed on the second main surface and the fourth main surface, respectively. The high-resistance portion is provided so as to surround both the conductive film formed on the second main surface and the conductive film formed on the fourth main surface when viewed from above. Vehicle window glass according to claim 1 or 2.

11. The opening into which the aforementioned vehicle window glass is installed is formed by a conductive frame material provided on the vehicle body. The aforementioned high-resistance portion overlaps with the frame material in plan view, Vehicle window glass according to claim 1 or 2.

12. A shielding layer is provided at the edge of the aforementioned vehicle window glass. The aforementioned high-resistance portion overlaps with the shielding layer in a plan view, at least in part. Vehicle window glass according to claim 1 or 2.

13. The high-resistance portion is provided in a portion of the entire circumference of the conductive film that is 36% or more. Vehicle window glass according to claim 1 or 2.

14. A vehicle comprising a vehicle window glass according to claim 1 or 2.

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