JP7511133B2 - Vehicle window glass - Google Patents

Description

The present invention relates to vehicle window glass, and in particular to vehicle window glass with an integrated lamp.

Conventionally, configurations have been considered for mounting a vehicle's high-mounted stop lamp to a vehicle window panel. When mounting a high-mounted stop lamp to a window panel, the wiring of the high-mounted stop lamp has been made difficult to see from the perspective of design by providing a cover called a housing on the inside of the window panel or by running the wiring along the periphery of the window panel. Patent Document 1 discloses technology related to a vehicle rear glass to which a high-mounted stop lamp is attached.

Japanese Utility Model Application Publication No. 4-24840

In recent years, there has been a growing interest in mounting not only high-mounted stop lamps but also tail lamps, brake lamps, and other lamps on vehicle window glass. To turn on the lamps, at least two wires and two bus bars connected to these wires must be provided. For this reason, mounting lamps on vehicle window glass creates the problem of complicated wiring.

In view of the above problems, the object of the present invention is to provide a vehicle window glass that can prevent the wiring from becoming complicated even when a lamp is installed.

A vehicle window glass according to one aspect of the present invention includes a glass sheet, a light-shielding portion provided around the glass sheet, a first bus bar provided on a first side of the light-shielding portion, a second bus bar provided on a second side of the light-shielding portion opposite the first side, a plurality of heater wires extending between the first bus bar and the second bus bar, a first lamp provided on the first bus bar side on the glass sheet, and a second lamp provided on the second bus bar side on the glass sheet. The first lamp and/or the second lamp are connected to a first power supply line, and the first power supply line includes a portion connected to the first bus bar and extending in a direction parallel to the plurality of heater wires.

In the above-mentioned vehicle window glass, the first lamp and the second lamp may be connected to the first power supply line.

In the above-mentioned vehicle window glass, the first bus bar may be connected to a ground potential or a predetermined power supply potential.

In the above-mentioned vehicle window glass, the first lamp and the second lamp may be connected to a second power supply line, and the second power supply line may include a portion that is connected to a first power supply portion near the second bus bar and extends in a direction parallel to the plurality of heater wires.

In the vehicle window glass described above, the first lamp may be connected to a second power supply line, the second lamp may be connected to a third power supply line, the second power supply line may be connected to a first power supply section near the second bus bar and may include a portion extending in a direction parallel to the heater wires, and the third power supply line may be connected to a second power supply section near the second bus bar and may include a portion extending in a direction parallel to the heater wires.

In the above-mentioned vehicle window glass, the heater wires and the power supply wires may be made of the same material.

The vehicle window glass may have a first conductive line, and the first conductive line may have a portion that is parallel to the first power supply line and the second power supply line, and may be arranged so as not to contact at least one of the first power supply line and the second power supply line.

In the above-mentioned vehicle window glass, the first conductive wire may be arranged so as not to contact both the first power supply line and the second power supply line.

The above-mentioned vehicle window glass has a first region sandwiched between a first line that is substantially parallel to the first bus bar and passes through the first lamp, and a second line that is substantially parallel to the second bus bar and passes through the second lamp, and the plurality of heater wires have a first heater wire that is closest to the first lamp and a second heater wire that is second closest to the first lamp, and in the first region, the first heater wire, the second heater wire, the first power supply line, the second power supply line, and the first conductive line may each have substantially the same spacing between adjacent lines.

In the above-mentioned vehicle window glass, the thicknesses of the multiple heater wires, the first power supply line, the second power supply line, and the first conductive wire may be approximately the same in the first region.

In the above vehicle window glass, the first conductive wire may be an antenna.

In the above-mentioned vehicle window glass, at least a portion of the plurality of heater wires may overlap the first lamp and/or the second lamp.

The present invention provides a vehicle window glass that can prevent the wiring from becoming complicated even when lamps are installed.

1 is a front view for explaining a configuration example of a vehicle window glass according to an embodiment. FIG. 1 is a cross-sectional view of a vehicle window glass in the vicinity of a lamp according to an embodiment of the present invention. FIG. 11 is a front view for explaining another configuration example of the vehicle window glass according to the embodiment. FIG. 11 is a front view for explaining another configuration example of the vehicle window glass according to the embodiment. FIG. 11 is a front view for explaining another configuration example of the vehicle window glass according to the embodiment. FIG. 11 is a front view for explaining another configuration example of the vehicle window glass according to the embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Fig. 1 is a front view for explaining a configuration example of a vehicle window glass according to an embodiment. As shown in Fig. 1, the vehicle window glass 1 according to the embodiment includes a glass plate 10, a light blocking portion 13, bus bars 11 and 12, a plurality of heater wires 15, and lamps 21 and 22. The vehicle window glass 1 according to the embodiment can typically be used as a rear glass of a vehicle. However, the vehicle window glass 1 according to the embodiment may be used in any location other than the rear glass.

The glass plate 10 is a glass plate for a vehicle, and may be, for example, a laminated glass in which two glass plates are bonded together via an intermediate film, or may be a single glass plate. The glass plate 10 shown in FIG. 1 is trapezoidal, but the shape of the glass plate 10 can be changed as appropriate depending on the location where the glass plate 10 is to be attached. For example, the glass plate 10 may have a shape in which four corners or four sides have a curvature. The glass plate 10 itself may also have a curvature. In this case, the glass plate 10 may have a "single bent" shape having a curvature in one direction (e.g., the x-axis direction or the y-axis direction), or a "double bent" shape having a curvature in two orthogonal directions (e.g., the x-axis direction and the y-axis direction).

The light-shielding portion 13 is provided around the glass plate 10. Specifically, the light-shielding portion 13 is formed along the outer periphery of the glass plate 10. The light-shielding portion 13 is formed on the surface of the glass plate on the negative side in the z-axis direction. The light-shielding portion 13 is a member that blocks visible light. When the light-shielding portion 13 is provided, when the glass plate 10 is attached to a vehicle, the attachment location and the like are difficult to see from outside the vehicle, improving the design of the vehicle. Similarly, the bus bars 11, 12, 41, and 42 are also difficult to see from outside the vehicle, improving the design of the vehicle. Note that, as shown in FIG. 1, the area of the glass plate 10 where the light-shielding portion 13 is not formed becomes a transparent area 14 that can transmit visible light.

The bus bar 11 is provided along the edge of the outer periphery of the glass plate 10 on the negative side in the x-axis direction. Specifically, the bus bar 11 is provided so as to overlap the light shielding portion 13_1 on the negative side in the x-axis direction of the light shielding portion 13 provided on the outer periphery of the glass plate 10, and to be provided along the direction in which the light shielding portion 13_1 extends (longitudinal direction).

The bus bar 12 is provided along the edge of the outer periphery of the glass plate 10 on the positive side in the x-axis direction. Specifically, the bus bar 12 is provided so as to overlap with the light shielding portion 13_2 on the positive side in the x-axis direction (in other words, the light shielding portion 13_2 facing the light shielding portion 13_1) of the light shielding portions 13 provided on the outer periphery of the glass plate 10, and to be provided along the direction in which the light shielding portion 13_2 extends (longitudinal direction).

Between the busbar 11 and the busbar 12, a plurality of heater wires 15 extend. The plurality of heater wires 15 function as a defogger that generates heat when a current flows through them and heats the glass sheet 10. Power is supplied to the plurality of heater wires 15 from the busbar 11 and the busbar 12. For example, when the busbar 11 is connected to a ground potential and the busbar 12 is connected to a predetermined power supply potential (positive potential), a current flows through the plurality of heater wires 15 from the busbar 12 to the busbar 11 (toward the negative side in the x-axis direction). Conversely, when the busbar 12 is connected to a ground potential and the busbar 11 is connected to a predetermined power supply potential (positive potential), a current flows through the plurality of heater wires 15 from the busbar 11 to the busbar 12 (toward the positive side in the x-axis direction). In the following, an example will be described in which the busbar 11 is connected to a ground potential and the busbar 12 is connected to a predetermined power supply potential (positive potential).

The lamps 21 and 22 are provided on the glass plate 10. The lamp 21 is provided on the bus bar 11 side (negative side in the x-axis direction), and the lamp 22 is provided on the bus bar 12 side (positive side in the x-axis direction). The lamps 21 and 22 each incorporate a light-emitting element 23 or 24 that emits light when power is supplied. The light-emitting elements 23 and 24 may be, for example, an LED (Light Emitting Diode) or an organic EL element. The lamps 21 and 22 are, for example, a tail lamp, a stop lamp, a reverse lamp, a turn signal lamp, etc.

In the vehicle window glass 1 according to this embodiment, the lamps 21, 22 are attached, for example, to the surface of the glass plate 10 on the inside of the vehicle (i.e., the surface of the glass plate on the negative side in the z-axis direction) (see FIG. 2). By attaching the lamps 21, 22 to the surface of the glass plate 10 in this way, the glass 10 can be expanded to the area where lamps were previously installed. As a result, the transmission area 14 of the glass plate 10 can be widened, thereby ensuring a wide field of view to the rear of the vehicle. Furthermore, by integrating the lamps 21, 22 into the glass plate 10, the design quality (designability) of the vehicle can be improved.

In the configuration example shown in FIG. 1, the negative terminals of lamps 21 and 22 (light-emitting elements 23 and 24) are arranged on the negative side of the y axis direction, and the positive terminals of lamps 21 and 22 (light-emitting elements 23 and 24) are arranged on the positive side of the y axis direction. In other words, in this embodiment, lamps 21 and 22 (light-emitting elements 23 and 24) are arranged so that their polarities are aligned in the y axis direction.

The negative terminals of the lamps 21 and 22 are connected to the power supply line 31. Since the power supply line 31 is connected to the bus bar 11, a ground potential is supplied to the negative terminals of the lamps 21 and 22 via the power supply line 31. The power supply line 31 also includes a portion that extends in a direction parallel to the heater wires 15 (x-axis direction). Note that in FIG. 1, the lamps 21 and 22 are shown in a perspective view in order to illustrate the arrangement of the power supply line 31 and the like. This is the same in the other drawings.

The positive terminal of the lamp 21 is connected to the power supply line 32. The power supply line 32 is connected to the bus bar 41. The bus bar 41 is provided in the vicinity of the bus bar 12 and independent of the bus bar 12. A positive power supply potential is supplied to the bus bar 41, and therefore a positive power supply potential is supplied to the positive terminal of the lamp 21 via the power supply line 32. This causes the lamp 21 to light up. The power supply line 32 also includes a portion that extends in a direction parallel to the multiple heater wires 15 (x-axis direction).

The positive terminal of the lamp 22 is connected to the power supply line 33. The power supply line 33 is connected to the bus bar 42. The bus bar 42 is provided in the vicinity of the bus bar 12 and independent of the bus bar 12. A positive power supply potential is supplied to the bus bar 42, and therefore a positive power supply potential is supplied to the positive terminal of the lamp 22 via the power supply line 33. This causes the lamp 22 to light up. The power supply line 33 also includes a portion that extends in a direction parallel to the multiple heater wires 15 (x-axis direction).

The terminals of the lamps 21, 22 (light-emitting elements 23, 24) and the power supply lines 31-33 can be connected by conductive members such as solder, springs, and wires. These conductive members can be used alone or in combination.

In the configuration example shown in FIG. 1, power supply lines 32, 33 are connected to the positive terminals of lamps 21, 22, respectively, so that lamps 21, 22 can be controlled independently. Therefore, in addition to tail lamps, stop lamps, reverse lamps, etc., which light up lamps 21, 22 synchronously, the configuration example shown in FIG. 1 can also be used as turn signal lamps, etc., which light up (blink) lamps 21, 22 independently. When blinking lamps 21, 22, for example, switching control is performed in a power supply control circuit (not shown) connected to bus bars 41, 42.

Figure 2 is a cross-sectional view of the vicinity of the lamp 22 of the vehicle window glass 1 according to this embodiment, showing a cross-sectional view of the lamp 22 cut along a cutting line extending in the y-axis direction. As shown in Figure 2, the lamp 22 is attached to the surface of the glass plate 10 on the negative side in the z-axis direction (the surface on the inside of the vehicle). The lamp 22 is attached a predetermined distance away from the surface of the glass plate 10. In other words, the lamp 22 is attached so that there is a gap between the lamp 22 and the glass plate 10, so that a power supply cable 32 can be arranged between the lamp 22 and the glass plate 10.

For example, the lamp 22 can be attached to the surface of the glass plate 10 by providing an adhesive member (not shown) between the lamp 22 and the glass plate 10. In the vehicle window glass 1, for example, a cover member (not shown) may be provided on the interior surface of the glass plate 10 (i.e., the surface on the negative side of the z-axis direction of the glass plate), and the lamp 22 may be sealed between the cover member and the glass plate 10. As shown in FIG. 2, the lamp 22 has a built-in light-emitting element 24, and power is supplied to the light-emitting element 24 via power supply lines 31 and 33. The lamp 21 has a similar configuration to the lamp 22.

In the vehicle window glass 1 according to this embodiment, the heater wires 15 and the power supply lines 31, 32, 33 may be formed, for example, by printing and baking a paste containing a conductive metal (e.g., silver paste, etc.) on the surface of the glass plate 10. The heater wires 15 and the power supply lines 31, 32, 33 may also be formed by attaching a linear or foil body containing a conductive material such as copper to the surface of the glass plate 10. The bus bars 11, 12 and the bus bars 41, 42 can also be formed using a similar method.

The heater wires 15 and the power feed lines 31, 32, and 33 may be made of the same material. By using the same material in this way, the design of the heater wires 15 and the power feed lines 31, 32, and 33 can be improved. The heater wires 15 and the power feed lines 31, 32, and 33 may also have approximately the same thickness. By making the heater wires 15 and the power feed lines 31, 32, and 33 have approximately the same thickness in this way, the design can be further improved. Here, approximately the same means that the standard deviation of the line width is 1 mm or less. The standard deviation of the line width of the heater wires 15 and the power feed lines 31, 32, and 33 is preferably 0.5 mm or less, and more preferably 0.1 mm or less.

In this embodiment, the material of some of the heater wires 15 and the power supply lines 31, 32, and 33 may be the same. Also, the thickness of some of the heater wires 15 and the power supply lines 31, 32, and 33 may be the same. Also, in this specification, the heater wires 15, the power supply lines 31, 32, and 33, and the bus bars 11, 12, 41, and 42 may be collectively referred to as "wiring".

As described above, in the vehicle window glass 1 according to this embodiment, the power terminals of the lamps 21, 22 are connected to a common power supply line 31, and the power supply line 31 is connected to the bus bar 11. The power supply line 31 also includes a portion that extends in a direction parallel to the heater wires 15. With this configuration, even when the lamps 21, 22 are provided on the glass sheet 10, the wiring (power supply line) can be prevented from becoming complicated.

That is, in this embodiment, the lamps 21 and 22 are arranged so that their polarities are the same. Then, the terminals of one polarity of the lamps 21 and 22 are connected to the power supply line 31, and the terminals of the other polarity are connected to the power supply lines 32 and 33. This configuration makes it possible to prevent the arrangement of the power supply lines 31, 32, and 33 for supplying power to the lamps 21 and 22 from becoming complicated. In particular, in this embodiment, since the terminals of one polarity of the lamps 21 and 22 are connected to the common power supply line 31, the number of power supply lines can be reduced, and the arrangement of the power supply lines can be prevented from becoming complicated.

In addition, in this embodiment, at least a portion of each of the power supply lines 31, 32, and 33 is configured to be parallel to the heater wire 15. Therefore, even if power supply lines 31, 32, and 33 are additionally arranged on the glass plate 10, they can be aligned with the multiple heater wires 15 for the defogger, improving the design of the vehicle window glass 1.

In addition, in this embodiment, the bus bars 41, 42 for supplying power to the power feed lines 32, 33 are arranged near the bus bar 12 of the same polarity. Specifically, the bus bars 41, 42 to which a positive power supply potential is supplied are arranged near the bus bar 12 to which a positive power supply potential is also supplied. Therefore, the potential difference between each of the bus bars 12, 41, 42 can be reduced, thereby preventing short circuits between the bus bars.

In this embodiment, as shown in FIG. 1, a conductive line (dummy wiring) 61 may be provided between the power supply line 31 and the power supply line 32. The dummy wiring is a conductive line that does not supply power to the lamps 21 and 22. The conductive line 61 has a portion parallel to the power supply line 31 and the power supply line 32, and is arranged so as not to contact at least one of the power supply line 31 and the power supply line 32. In other words, the conductive line 61 may be arranged so as to contact either one of the power supply line 31 and the power supply line 32, or may be arranged so as not to contact both the power supply line 31 and the power supply line 32. The configuration example shown in FIG. 1 shows an example in which the conductive line 61 is not in contact with both the power supply line 31 and the power supply line 32. By providing the conductive line 61 between the power supply line 31 and the power supply line 32 in this way, the design of the vehicle window glass 1 can be improved.

In addition, in this embodiment, as shown in FIG. 1, in a region 55 (i.e., a central region) between a line 51 that is substantially parallel to the bus bar 11 and passes through the lamp 21, and a line 52 that is substantially parallel to the bus bar 12 and passes through the lamp 22, the intervals d1 to d4 between adjacent lines may be substantially the same. Specifically, the interval d1 between the heater wire 15 closest to the lamp 21 and the heater wire 15 second closest to the lamp 21, the interval d2 between the heater wire 15 and the power supply line 32, the interval d3 between the power supply line 32 and the conductive wire 61, and the interval d4 between the conductive wire 61 and the power supply line 31 may be substantially the same. With this configuration, the design of the vehicle window glass 1 can be improved.

Note that "substantially parallel" means that the angle between busbar 11 and wire 51, and the angle between busbar 12 and wire 52, are each within the range of approximately 0° to 15°. Also, "substantially identical" means that the standard deviation of spacing d1 to d4 is 10 mm or less. The standard deviation of spacing d1 to d4 is preferably 6 mm or less, more preferably 4 mm or less, and even more preferably 2 mm or less. Also, in this embodiment, the spacing between each of the heater wires 15 may be approximately the same as spacing d1 to d4.

In addition, in this embodiment, the distance between the heater wires 15 on the side closer to the lamps 21, 22 may be different from the distance between the heater wires 15 on the side farther from the lamps 21, 22 (the positive side in the y-axis direction). For example, the distance d1 between the heater wires 15 on the side closer to the lamps 21, 22 may be wider than the distance d5 between the heater wires 15 on the side farther from the lamps 21, 22 (the positive side in the y-axis direction).

In addition, in this embodiment, the heater wire 15, conductive wire 61, and power supply lines 31 and 32 may have approximately the same thickness. In this way, by making the heater wire 15, conductive wire 61, and power supply lines 31 and 32 have approximately the same thickness, the design can be further improved. Here, approximately the same means that the standard deviation of the line width is 1 mm or less. The standard deviation of the line width of the heater wire 15, conductive wire 61, and power supply lines 31 and 32 is preferably 0.5 mm or less, and more preferably 0.1 mm or less.

Furthermore, in this embodiment, conductive lines (dummy wiring) 62, 63 may be provided on the bus bar 11 side. For example, the conductive line 62 may be provided on an extension of the power supply line 32. Also, the conductive line 63 may be provided on an extension of the conductive line 61. In other words, the spacing between the multiple heater wires 15 and the conductive lines 62, 63 may be approximately the same even in the region on the negative side of the x-axis direction from the line 51. Also, in this embodiment, the spacing between the multiple heater wires 15 and the power supply lines 32, 33 may be approximately the same even in the region on the positive side of the x-axis direction from the line 52. This can further improve the design of the vehicle window glass 1.

Figure 3 is a front view for explaining another example of the configuration of the vehicle window glass according to this embodiment. In Figure 3, the same components as those in the vehicle window glass 1 shown in Figure 1 are given the same reference numerals.

In the vehicle window glass 2 shown in FIG. 3, the negative terminals of the lamps 21 and 22 are connected to a power supply line 31. Since the power supply line 31 is connected to the bus bar 11, a ground potential is supplied to the negative terminals of the lamps 21 and 22 via the power supply line 31. The power supply line 31 also includes a portion that extends in a direction parallel to the multiple heater wires 15 (x-axis direction).

The positive terminals of lamps 21 and 22 are connected to power supply line 34. Power supply line 34 is connected to bus bar 43. Bus bar 43 is provided in the vicinity of bus bar 12 and independent of bus bar 12. A positive power supply potential is supplied to bus bar 43, and therefore a positive power supply potential is supplied to the positive terminals of lamps 21 and 22 via power supply line 34. This causes lamps 21 and 22 to light up. Power supply line 34 also includes a portion that extends in a direction parallel to the multiple heater wires 15 (x-axis direction).

In the configuration example shown in FIG. 3, the negative terminals of the lamps 21 and 22 are connected to a common power supply line 31, and the power supply line 31 is connected to the bus bar 11. The positive terminals of the lamps 21 and 22 are connected to a common power supply line 34, and the power supply line 34 is connected to the bus bar 43. In this manner, in the configuration example shown in FIG. 3, the negative terminals of the lamps 21 and 22 are connected to the common power supply line 31, and the positive terminals of the lamps 21 and 22 are connected to the common power supply line 34, so that the number of power supply lines can be reduced and the arrangement of the power supply lines can be more effectively prevented from becoming complicated. For example, the vehicle window glass 2 shown in FIG. 3 can be used as a tail lamp, stop lamp, reverse lamp, etc., in which the lamps 21 and 22 are turned on in a synchronized manner.

In addition, in the vehicle window glass 2 shown in FIG. 3, a conductive wire 61 may be provided between the power supply line 31 and the power supply line 34. FIG. 3 shows an example of a configuration in which both ends of the conductive wire 61 overlap with the lamp 21 and the lamp 22. In this embodiment, the conductive wire 61 may be arranged so that both ends overlap with at least one of the lamp 21 and the lamp 22, or may be configured so that both ends of the conductive wire 61 do not overlap with the lamp 21 and the lamp 22 as shown in FIG. 1.

In addition, in this embodiment, the conductive wire 61 may constitute an antenna capable of receiving radio waves in a frequency band such as broadcast waves. When the conductive wire 61 is used as an antenna, for example, the antenna power feeder 60 is extended to the conductive wire 61 through the gap between the lamp 22 and the glass plate 10 shown in FIG. 3 (see FIG. 2), and the power feeder 60 and the conductive wire 61 are connected. The power feeder 60 is connected to the antenna power supply unit 44. The power supply unit 44 may have a configuration in which, for example, the inner conductor (core wire) of a coaxial cable (not shown) is electrically connected to receive a signal at an amplifier (not shown). In this case, the outer conductor of the coaxial cable is grounded to the vehicle body. With this configuration, the design of the vehicle window glass 2 is ensured, while the signal from the antenna including the conductive wire 61 can be received via the power supply unit 44.

In addition to the conductive wire 61, the antenna may be capacitively coupled with the power feeder 34, for example, and used as an antenna for receiving broadcast waves, etc. Examples of broadcast waves include radio waves in the FM broadcast wave (88 MHz to 108 MHz) frequency band and radio waves in the European standard DAB (Digital Audio Broadcast) Band III (174 MHz to 240 MHz) frequency band.

In addition, in this embodiment, at least a portion of the multiple heater wires 15 (defogger) may overlap at least one of the lamps 21 and 22. With this configuration, it is possible to prevent the glass sheet 10 from fogging at the positions where the glass sheet 10 overlaps with the lamps 21 and 22, and to facilitate the transmission of light from the lamps 21 and 22.

Furthermore, another configuration example of the vehicle window glass according to this embodiment will be described with reference to FIG. 4. The configuration example of FIG. 4 differs from the configuration example of FIG. 1 in that the polarity of the lamps 21, 22 is reversed in the y-axis direction. Other than this, it is the same as the configuration example shown in FIG. 1. Note that in the vehicle window glass 3 shown in FIG. 4, the same components as those in the vehicle window glass 1 shown in FIG. 1 are given the same reference numerals.

In the vehicle window glass 3 shown in FIG. 4, the negative terminals of the lamps 21 and 22 are arranged on the positive side of the y-axis direction, and the positive terminals of the lamps 21 and 22 are arranged on the negative side of the y-axis direction. In the configuration example shown in FIG. 4, the lamps 21 and 22 are also arranged so that their polarities are aligned in the y-axis direction.

In the vehicle window glass 3 shown in FIG. 4, the negative terminals of the lamps 21 and 22 are connected to a power supply line 35. Since the power supply line 35 is connected to the bus bar 11, a ground potential is supplied to the negative terminals of the lamps 21 and 22 via the power supply line 35. The power supply line 35 also includes a portion that extends in a direction parallel to the multiple heater wires 15 (x-axis direction).

The positive terminal of the lamp 21 is connected to the power supply line 36. The power supply line 36 is connected to the bus bar 46. The bus bar 46 is provided in the vicinity of the bus bar 12 and independent of the bus bar 12. A positive power supply potential is supplied to the bus bar 46, and therefore the positive terminal of the lamp 21 is supplied with a positive power supply potential via the power supply line 36. This causes the lamp 21 to light up. The power supply line 36 also includes a portion that extends in a direction parallel to the multiple heater wires 15 (x-axis direction).

The positive terminal of the lamp 22 is connected to a power supply line 37. The power supply line 37 is connected to a bus bar 47. The bus bar 47 is provided in the vicinity of the bus bar 12 and independent of the bus bar 12. A positive power supply potential is supplied to the bus bar 47, and therefore a positive power supply potential is supplied to the positive terminal of the lamp 22 via the power supply line 37. This causes the lamp 22 to light up. The power supply line 37 also includes a portion that extends in a direction parallel to the multiple heater wires 15 (x-axis direction).

In the configuration example shown in FIG. 4, power supply lines 36 and 37 are connected to the positive terminals of lamps 21 and 22, respectively, so that lamps 21 and 22 can be controlled independently. Therefore, in addition to tail lamps, stop lamps, reverse lamps, etc., which light up lamps 21 and 22 in a synchronized manner, the configuration example shown in FIG. 4 can also be used for turn signal lamps, etc., which light up (blink) lamps 21 and 22 independently.

In the vehicle window glass 3 shown in FIG. 4, the lamps 21 and 22 are arranged so that their polarities are the same. The terminals of one polarity of the lamps 21 and 22 are connected to the power supply line 35, and the terminals of the other polarity are connected to the power supply lines 36 and 37. This configuration can prevent the arrangement of the power supply lines 35, 36, and 37 for supplying power to the lamps 21 and 22 from becoming complicated. In the vehicle window glass 3 shown in FIG. 4, the terminals of one polarity of the lamps 21 and 22 are connected to the common power supply line 35, so that the number of power supply lines can be reduced and the arrangement of the power supply lines can be prevented from becoming complicated. In the configuration example shown in FIG. 4, the positive terminals of the lamps 21 and 22 may be connected to a common power supply line as in the configuration example shown in FIG. 3. In other words, the power supply lines 36 and 37 may be a common power supply line.

Also, in the vehicle window glass 3 shown in FIG. 4, a conductive line (dummy wiring) 61 may be provided between the power supply line 35 and the power supply line 36. Furthermore, conductive lines (dummy wiring) 64, 65 may be provided on the bus bar 11 side. For example, the conductive line 64 may be provided on an extension of the conductive line 61. Furthermore, the conductive line 65 may be provided on an extension of the power supply line 36. Furthermore, conductive lines (dummy wiring) 66, 67 may be provided on the bus bar 12 side. For example, the conductive line 66 may be provided on an extension of the power supply line 35. Furthermore, the conductive line 67 may be provided on an extension of the conductive line 61. By adopting such a configuration, the design of the vehicle window glass 3 can be further improved.

Furthermore, another configuration example of a vehicle window glass according to this embodiment will be described with reference to FIG. 5. The configuration example of FIG. 5 differs from the configuration example of FIG. 4 in the configuration of the power supply wire connected to the positive terminals (negative side in the y-axis direction) of the lamps 21 and 22. Other than this, it is the same as the configuration example shown in FIG. 4.

In the vehicle window glass 4 shown in FIG. 5, the negative terminals of the lamps 21 and 22 are connected to a power supply line 35. The power supply line 35 is connected to the bus bar 11, so that a ground potential is supplied to the negative terminals of the lamps 21 and 22 via the power supply line 35. The power supply line 35 also includes a portion that extends in a direction parallel to the multiple heater wires 15 (x-axis direction).

The positive terminal of the lamp 21 is connected to a power supply line 38. The power supply line 38 is connected to a bus bar 48. The bus bar 48 is arranged so as to overlap with the light shielding portion 13_3 on the negative side in the y-axis direction, among the light shielding portions 13 arranged on the outer periphery of the glass plate 10. A positive power supply potential is supplied to the bus bar 48, and therefore a positive power supply potential is supplied to the positive terminal of the lamp 21 via the power supply line 38. This causes the lamp 21 to light up.

The positive terminal of the lamp 22 is connected to a power supply line 39. The power supply line 39 is connected to a bus bar 49. The bus bar 49 is arranged so as to overlap with the light shielding portion 13_3 on the negative side in the y-axis direction, among the light shielding portions 13 arranged on the outer periphery of the glass plate 10. A positive power supply potential is supplied to the bus bar 49, and therefore a positive power supply potential is supplied to the positive terminal of the lamp 22 via the power supply line 39. This causes the lamp 22 to light up.

In the configuration example shown in FIG. 5, power supply lines 38 and 39 are connected to the positive terminals of lamps 21 and 22, respectively, so lamps 21 and 22 can be controlled independently. Therefore, in addition to tail lamps, stop lamps, reverse lamps, etc., in which lamps 21 and 22 are lit in sync, the configuration example shown in FIG. 5 can also be used as turn signal lamps, etc., in which lamps 21 and 22 are lit (blinked) independently.

In the vehicle window glass 4 shown in FIG. 5, the lamps 21, 22 are also arranged so that their polarities are the same. The terminals of one polarity of the lamps 21, 22 are connected to the power supply line 35, and the terminals of the other polarity are connected to the power supply lines 38, 39. This configuration makes it possible to prevent the arrangement of the power supply lines 35, 38, 39 for supplying power to the lamps 21, 22 from becoming complicated. In the vehicle window glass 4 shown in FIG. 5, the terminals of one polarity of the lamps 21, 22 are also connected to the common power supply line 35, so that the number of power supply lines can be reduced and the arrangement of the power supply lines can be prevented from becoming complicated.

In particular, in the vehicle window glass 4 shown in FIG. 5, the bus bar 48 is disposed near the lamp 21, and the bus bar 49 is disposed near the lamp 22, which effectively prevents the arrangement of the power supply lines 38, 39 from becoming complicated. In addition, in the vehicle window glass 4 shown in FIG. 5, the bus bars 48, 49 are arranged so as to overlap the light blocking portion 13_3, which makes the bus bars 48, 49 less noticeable and improves the design of the vehicle.

In the vehicle window glass 4 shown in FIG. 5, a conductive line (dummy wiring) 61 may also be provided on the negative side of the power supply line 35 in the y-axis direction. A conductive line (dummy wiring) 64 may also be provided on the bus bar 11 side. For example, the conductive line 64 may be provided on an extension of the conductive line 61. Furthermore, conductive lines (dummy wiring) 66, 67 may also be provided on the bus bar 12 side. For example, the conductive line 66 may be provided on an extension of the power supply line 35. The conductive line 67 may also be provided on an extension of the conductive line 61. By using such a configuration, the design of the vehicle window glass 4 can be further improved.

Furthermore, another configuration example of the vehicle window glass according to this embodiment will be described with reference to FIG. 6. The configuration example of FIG. 6 differs from the configuration example of FIG. 1 in the positions of the terminals of the lamps 21, 22. Other than this, it is the same as the configuration example shown in FIG. 1. Note that in the vehicle window glass 5 shown in FIG. 6, the same components as those in the vehicle window glass 1 shown in FIG. 1 are given the same reference numerals.

In the vehicle window glass 5 shown in FIG. 6, the negative terminals of the lamps 21 and 22 are arranged on the negative side in the x-axis direction, and the positive terminals of the lamps 21 and 22 are arranged on the positive side in the x-axis direction. In the configuration example shown in FIG. 6, the lamps 21 and 22 are arranged so that their polarities are aligned in the x-axis direction.

In the vehicle window glass 5 shown in FIG. 6, the negative terminals of the lamps 21 and 22 are connected to a power supply line 71. Since the power supply line 71 is connected to the bus bar 11, a ground potential is supplied to the negative terminals of the lamps 21 and 22 via the power supply line 71. The power supply line 71 also includes a portion that extends in a direction parallel to the multiple heater wires 15 (x-axis direction).

The positive terminal of the lamp 21 is connected to a power supply line 72. The power supply line 72 is connected to a bus bar 81. The bus bar 81 is provided in the vicinity of the bus bar 12 and independent of the bus bar 12. A positive power supply potential is supplied to the bus bar 81, and therefore a positive power supply potential is supplied to the positive terminal of the lamp 21 via the power supply line 72. This causes the lamp 21 to light up. The power supply line 72 also includes a portion that extends in a direction parallel to the multiple heater wires 15 (x-axis direction).

The positive terminal of the lamp 22 is connected to a power supply line 73. The power supply line 73 is connected to a bus bar 82. The bus bar 82 is provided in the vicinity of the bus bar 12 and independent of the bus bar 12. A positive power supply potential is supplied to the bus bar 82, and therefore a positive power supply potential is supplied to the positive terminal of the lamp 22 via the power supply line 73. This causes the lamp 22 to light up. The power supply line 73 also includes a portion that extends in a direction parallel to the multiple heater wires 15 (x-axis direction).

In the configuration example shown in FIG. 6, power supply lines 72 and 73 are connected to the positive terminals of lamps 21 and 22, respectively, so that lamps 21 and 22 can be controlled independently. Therefore, in addition to tail lamps, stop lamps, reverse lamps, etc., in which lamps 21 and 22 are lit in sync, the configuration example shown in FIG. 6 can also be used for turn signal lamps, etc., in which lamps 21 and 22 are lit (blinked) independently.

In the vehicle window glass 5 shown in FIG. 6, the lamps 21 and 22 are arranged so that their polarities are aligned in the x-axis direction. The terminals of one polarity of the lamps 21 and 22 are connected to the power supply line 71, and the terminals of the other polarity are connected to the power supply lines 72 and 73. This configuration makes it possible to prevent the arrangement of the power supply lines 71, 72, and 73 for supplying power to the lamps 21 and 22 from becoming complicated. Also, in the vehicle window glass 5 shown in FIG. 6, the terminals of one polarity of the lamps 21 and 22 are connected to the common power supply line 71, so that the number of power supply lines can be reduced and the arrangement of the power supply lines can be prevented from becoming complicated.

In addition, in the vehicle window glass 5 shown in FIG. 6, the negative terminals of the lamps 21, 22 are arranged on the negative bus bar 11 side, and the positive terminals of the lamps 21, 22 are arranged on the positive bus bar 12 side. In this way, by aligning the polarity of the bus bars 11, 12 and the lamps 21, 22 in the x-axis direction, the length of the power supply lines 71, 72, 73 can be shortened.

Note that although the length of the power supply lines 71, 72, and 73 will be longer than in the configuration example of FIG. 6, for example, the negative terminals of the lamps 21 and 22 may be arranged on the positive side of the x-axis direction, and the positive terminals of the lamps 21 and 22 may be arranged on the negative side of the x-axis direction.

In addition, in the configuration example of FIG. 6, for example, the negative terminals of lamps 21 and 22 may be arranged so that they face outward from each other in the x-axis direction, and the positive terminals of lamps 21 and 22 face inward from each other in the x-axis direction. Conversely, the negative terminals of lamps 21 and 22 may be arranged so that they face inward from each other in the x-axis direction, and the positive terminals of lamps 21 and 22 face outward from each other in the x-axis direction. In this case, the polarities of lamps 21 and 22 will not be aligned in the x-axis direction, but since the positive and negative terminals of lamps 21 and 22 are aligned in the x-axis direction, the arrangement of the power supply lines that supply power to these lamps can be prevented from becoming complicated.

In addition, in the configuration example shown in FIG. 6, the positive terminals of lamps 21 and 22 may be connected to a common power supply line as in the configuration example shown in FIG. 3. In other words, power supply lines 72 and 73 may be a common power supply line.

In the configuration examples shown in Figs. 1 to 6, the bus bar 11 is connected to a ground potential, and the bus bar 12 is connected to a predetermined power supply potential (positive potential). However, in this embodiment, the bus bar 11 may be connected to a predetermined power supply potential (positive potential), and the bus bar 12 may be connected to a ground potential. In this case, in the configuration shown in Fig. 1, the power supply line 31 is connected to the positive terminals of the lamps 21 and 22 (light-emitting elements 23 and 24), the power supply line 32 is connected to the negative terminal of the lamp 21 (light-emitting element 23), and the power supply line 33 is connected to the negative terminal of the lamp 22 (light-emitting element 24). In addition, the bus bars 41 and 42 are each connected to a ground potential. For example, when the lamps 21 and 22 are to be turned on and off, switching control is performed in a power supply control circuit (not shown) connected to the bus bars 41 and 42.

In the above configuration examples, the positive and negative terminals of each of the lamps 21, 22 are arranged in the y-axis direction (see Figures 1 to 5), and the positive and negative terminals of each of the lamps 21, 22 are arranged in the x-axis direction (see Figure 6). However, in this embodiment, the positive and negative terminals of each of the lamps 21, 22 may be arranged so that they are aligned obliquely with respect to the x-axis and y-axis in the xy plane.

In addition, in the above configuration example, a configuration including two lamps 21 and 22 has been described, but in this embodiment, the number of lamps is not limited as long as the configuration includes at least one lamp. For example, the configuration may include one lamp, or may include three or more lamps.

In the configuration examples shown in the above-mentioned Figures 1 to 6, all of the components (lamp including light-emitting element, heater wire, power supply line, bus bar, and dummy wiring) provided on the surface of the vehicle window glass except for the light-shielding portion 13 may be arranged symmetrically with respect to the center line in the x-axis direction of the glass plate 10. For example, in Figure 1, the bus bar 11 may be provided along the side of the outer periphery of the glass plate 10 on the positive side in the x-axis direction, and the bus bars 12, 41, and 42 may be provided along the side of the outer periphery of the glass plate 10 on the negative side in the x-axis direction.

In the configuration examples shown in the above-mentioned Figures 1 to 6, all of the components (lamp including light-emitting element, heater wire, power supply line, bus bar, and dummy wiring) provided on the surface of the vehicle window glass except for the light-shielding portion 13 may be rotated 90° clockwise or counterclockwise with respect to the center position of the glass plate 10 in the x-axis direction and the y-axis direction. For example, in Figure 1, the bus bar 11 may be provided along the edge of the outer periphery of the glass plate 10 on the positive or negative side in the y-axis direction, and the bus bars 12, 41, and 42 may be provided along the edge of the outer periphery of the glass plate 10 on the negative or positive side in the y-axis direction.

The components that make up vehicle window glass are described in detail below.

(Glass plate)
The thickness of the glass plate 10 in the vehicle window glass according to this embodiment can be appropriately selected within the range of 0.5 mm to 10 mm. From the viewpoint of resistance to flying stone impact, the thickness of the glass plate 10 is preferably 1.6 mm or more, more preferably 2.1 mm or more, even more preferably 2.5 mm or more, and particularly preferably 2.8 mm or more. In order to suppress the mass of the vehicle window glass, the thickness of the glass plate 10 is preferably 6 mm or less, more preferably 5 mm or less, and even more preferably 3.5 mm or less.

In addition, when the vehicle window glass according to this embodiment is a laminated glass in which two glass sheets are bonded together via an intermediate film, the thickness of the paired glass sheets may be the same as or different from that of glass sheet 10. In this case, for example, the thickness of the glass sheet arranged on the negative side in the z-axis direction may be smaller than the thickness of the glass sheet arranged on the positive side in the z-axis direction.

The composition of the glass plate 10 is not particularly limited. The glass plate 10 may be, for example, inorganic glass such as soda lime glass or aluminosilicate, or organic glass such as polyethylene carbonate or acrylic resin, with inorganic glass being preferred. The inorganic glass may be green glass, clear glass, privacy glass, or the like.

The glass plate 10 is formed into a plate shape, for example, by a float method, and then bent at high temperature by gravity forming or press forming. Tempered glass is preferably used for the glass plate 10. The tempered glass may be either physically tempered glass or chemically tempered glass, but physically tempered glass is preferred, and among physically tempered glass, air-cooled tempered glass is more preferred.

The glass plate 10 may be coated on the exterior surface (surface on the positive side in the z-axis direction) with a coating that imparts water repellency, hydrophilicity, anti-fogging properties, etc. The glass plate 10 may also be coated on the interior surface (surface on the negative side in the z-axis direction) with a coating such as a low-emissivity coating, an infrared-shielding coating, or an ultraviolet-shielding coating.

(Interlayer)
When the vehicle window glass according to the present embodiment is a laminated glass in which two glass sheets are bonded together via an interlayer film, the interlayer film may be one generally used for laminated glass. For example, a thermoplastic resin, a thermosetting resin, or a photocurable composition may be used for the interlayer film. Examples of the thermoplastic resin include polyvinyl acetal resins such as polyvinyl butyral resin (PVB), polyvinyl chloride resin (PVC), saturated polyester resins, polyurethane resins, ethylene-vinyl acetate copolymer resins (EVA), ethylene-ethyl acrylate copolymer resins, and cycloolefin polymers (COP). The thermoplastic resins used for the interlayer film are preferably PVB, EVA, polyurethane resins, etc.

The intermediate film may have a single layer structure or a laminated structure in which two or more layers are laminated. When the intermediate film has a multi-layer structure, layers with different glass transition points can be laminated to give the intermediate film sound insulation. For example, an intermediate film having a three-layer laminated structure with sound insulation may have a structure in which the intermediate layer is a core layer with a glass transition point of less than 15°C, and the two layers sandwiching this core layer (intermediate layer) are skin layers with a glass transition point of 15°C or higher.

(Light shielding part)
The light-shielding portion 13 may be made of, for example, organic ink or inorganic ceramics, and is preferably made of inorganic ceramics. The light-shielding portion 13 can be formed, for example, by applying organic ink or inorganic ceramics to the glass surface by screen printing or the like, and drying the applied material. The color of the light-shielding portion 13 may be any color as long as it can block visible light to an extent that it can be concealed at least in the portion that needs to be concealed. However, dark colors such as black, brown, gray, and dark blue are preferable, and black is more preferable. The width of the light-shielding portion 13 is appropriately selected depending on the application of the vehicle window glass. The width of the light-shielding portion 13 may be formed in a frame shape having a width of, for example, about 10 to 200 mm.

(heater wire, power supply wire and conductive wire)
Hereinafter, the heater wire, the power supply wire, and the conductive wire are collectively referred to as the electric wire. The electric wire may be made of any material as long as it has electrical conductivity, and examples of the material include gold, silver, copper, aluminum, tin, etc. Specifically, the electric wire can be formed by printing an electrically conductive silver paste containing silver, glass frit, etc. on the surface of the glass plate 10 and baking the paste.

The thickness of the electric wire is preferably 30 μm or less, more preferably 20 μm or less, and even more preferably 15 μm or less. The thickness of the electric wire is preferably 1 μm or more, more preferably 2 μm or more, even more preferably 3 μm or more, and particularly preferably 4 μm or more. The width of the electric wire is preferably 0.1 mm or more, more preferably 0.2 mm or more, and even more preferably 0.3 mm or more. The width of the electric wire is preferably 3 mm or less, more preferably 2 mm or less, and even more preferably 1 mm or less. The spacing of the heater wires 15 in the central region of the vehicle window glass is preferably 10 mm or more, and more preferably 20 mm or more. The spacing of the heater wires 15 in the central region of the vehicle window glass is preferably 60 mm or less, and more preferably 40 mm or less.

The present invention has been described above in accordance with the above embodiment, but the present invention is not limited to the configuration of the above embodiment, and of course includes various modifications, alterations, and combinations that a person skilled in the art could make within the scope of the invention of the claims of this patent application.

REFERENCE SIGNS LIST 1, 2, 3, 4, 5 Vehicle window glass 10 Glass plate 11, 12 Bus bar 13 Light-shielding portion 14 Transmitting area 15 Heater wire 21, 22 Lamp 23, 24 Light-emitting element 31, 32, 33, 34, 35, 36, 37, 38, 39 Power supply line 41, 42, 43, 46, 47, 48, 49 Bus bar 44 Power supply portion (for antenna)
60 Power supply line (for antenna)
61, 62, 63, 64, 65, 66, 67 Conductive lines (dummy wiring)
71, 72, 73 Power supply lines 81, 82 Bus bars

Claims (13)

A glass plate and
a light-shielding portion provided around the periphery of the glass plate;
a first bus bar provided on a first side of the light blocking portion;
a second bus bar provided on a second side of the light blocking portion opposite to the first side;
a plurality of heater wires extending between the first bus bar and the second bus bar;
a first lamp provided on the glass plate on a side of the first bus bar;
a second lamp provided on the glass plate on a side of the second bus bar;
the first lamp and/or the second lamp are connected to a first power supply line;
the first power supply line includes a portion connected to the first bus bar and extending in a direction parallel to the plurality of heater wires,
At least a portion of the plurality of heater wires overlaps with the first lamp and/or the second lamp.
Vehicle window glass. A glass plate and
a light-shielding portion provided around the periphery of the glass plate;
a first bus bar provided on a first side of the light blocking portion;
a second bus bar provided on a second side of the light blocking portion opposite to the first side;
a plurality of heater wires extending between the first bus bar and the second bus bar;
a first lamp provided on the glass plate on a side of the first bus bar;
a second lamp provided on the glass plate on a side of the second bus bar;
the first lamp and/or the second lamp are connected to a first power supply line;
the first power supply line includes a portion connected to the first bus bar and extending in a direction parallel to the plurality of heater wires,
the first lamp and the second lamp are connected to a second power supply line;
the second power supply line includes a portion connected to a first power supply portion near the second bus bar and extending in a direction parallel to the heater wires,
a first conductive line, the first conductive line having a portion parallel to the first power supply line and the second power supply line, and a dummy wiring not in contact with at least one of the first power supply line and the second power supply line;
the dummy wiring is disposed between the first power supply line and the second power supply line;
Vehicle window glass. 3. The vehicle window glass according to claim 1, wherein the first lamp and the second lamp are connected to the first power supply line. The vehicle window glass according to claim 1 , wherein the first bus bar is connected to a ground potential or a predetermined power supply potential. the first lamp and the second lamp are connected to a second power supply line;
the second power supply line is connected to a first power supply portion near the second bus bar and includes a portion extending in a direction parallel to the plurality of heater wires;
The vehicle window glass according to claim 1 . The first lamp is connected to a second power supply line;
The second lamp is connected to a third power supply line;
the second power supply line includes a portion connected to a first power supply portion near the second bus bar and extending in a direction parallel to the heater wires,
the third power supply line is connected to a second power supply portion near the second bus bar and includes a portion extending in a direction parallel to the plurality of heater wires;
The vehicle window glass according to claim 1 . The vehicle window glass according to claim 5 or 6 , wherein the plurality of heater wires and the plurality of power supply lines are made of the same material. A first conductive line is provided.
the first conductive line has a portion parallel to the first power supply line and the second power supply line, and is arranged so as not to contact at least one of the first power supply line and the second power supply line.
The vehicle window glass according to any one of claims 5 to 7 . The vehicle window glass according to claim 8 , wherein the first conductive line is arranged so as not to contact both the first power supply line and the second power supply line. 10. The vehicle window glass according to claim 8 , wherein the first conductive line is disposed between the first power supply line and the second power supply line. a first region sandwiched between a first line that is substantially parallel to the first bus bar and passes through the first lamp, and a second line that is substantially parallel to the second bus bar and passes through the second lamp;
the plurality of heater wires include a first heater wire closest to the first lamp and a second heater wire second closest to the first lamp;
In the first region, the first heater wire, the second heater wire, the first power supply line, the second power supply line, and the first conductive line have substantially the same intervals between adjacent lines.
The vehicle window glass according to any one of claims 8 to 10 . 12. The vehicle window glass according to claim 11 , wherein in the first region, the heater wires, the first power supply line, the second power supply line, and the first conductive line have substantially the same thickness. The vehicle window glass according to any one of claims 8 to 12 , wherein the first conductive wire is an antenna.

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