JP2020051974A - On-vehicle light device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an in-vehicle light device capable of suppressing the arrival of radiant heat and electromagnetic waves from a lamp side to a radar device side while integrally configuring a radar device and a lamp. An in-vehicle light device U for monitoring a region outside a vehicle in a first direction, the lamp unit having a light source 21a that emits light in the first direction and a reflector 22a that surrounds the light source. 20a, a circuit board 11 arranged so that the board surface extends horizontally on the lower side or the upper side of the lamp unit, and the first direction side of the reflector in the board surface of the circuit board. The radar unit 10 has an antenna unit that transmits electromagnetic waves in the first direction and receives the reflected waves, and is arranged so as to partition the space between the lamp unit and the radar unit. An in-vehicle light device including a separator 14 that shields the transmission of radiant heat and electromagnetic waves between the lamp unit and the radar unit. [Selection diagram] Fig. 2

Description

  The present disclosure relates to a vehicle-mounted light device.

  2. Description of the Related Art Conventionally, an in-vehicle light device in which a millimeter wave radar (hereinafter, also referred to as a “radar device”) is integrally provided with a lamp (for example, a headlight or a backlight) that irradiates the outside of a vehicle is known (for example, , Patent Document 1).

  Such an in-vehicle light device is suitable in that it saves space for mounting a millimeter-wave radar and contributes to improving the design of a vehicle body.

JP 2008-186741 A

  By the way, in this kind of on-vehicle light device, the radar device and the light source of the lamp are arranged close to each other. For this reason, in the vehicle-mounted light device according to the related art, there has been a problem that electronic components such as a microcomputer of the radar device are damaged by radiant heat from the light source, and the operation of the radar device becomes unstable.

  Also, in the vehicle-mounted light device according to the related art, the electromagnetic wave transmitted from the radar device and reflected by the target and returned returns to the reflector of the lamp (condenses the light emitted from the light source to control the irradiation range of the light). There is a possibility that the light will be reflected again by the reflective member and arrive at the antenna unit of the radar device. In particular, since the reflector is a reflective member having a planar spread, it causes multiple reflections with a circuit board or the like on which the antenna unit is provided, and generates a standing wave between the reflector and the antenna unit. There is a risk. When such a standing wave is superimposed on an electromagnetic wave directly arriving at the antenna unit from the target, a blind spot region where the target cannot be detected is caused in the reception characteristics of the antenna unit.

  An object of the present disclosure is to provide a vehicle-mounted light device that can suppress the propagation of radiant heat and electromagnetic waves from the lamp device side to the radar device side while integrally configuring the radar device and the lamp device.

The main disclosure for solving the above-mentioned problems is as follows.
An on-vehicle light device for monitoring an area in a first direction outside a vehicle,
A light source that emits light in the first direction, and a lamp unit having a reflector surrounding the light source;
A circuit board disposed on a lower side or an upper side of the lamp unit such that a board surface extends substantially in a horizontal direction, and the first direction side of the reflector within the board surface of the circuit board. A radar unit having an antenna unit arranged to transmit an electromagnetic wave in the first direction and receive the reflected wave;
A separator that is arranged to partition a space between the lamp unit and the radar unit, and that blocks transmission of radiant heat and electromagnetic waves between the lamp unit and the radar unit,
It is a vehicle-mounted light device provided with.

  According to the vehicle-mounted light device according to the present disclosure, it is possible to suppress the propagation of radiant heat and electromagnetic waves from the lamp side to the radar device side.

FIG. 2 is a perspective view showing an arrangement state of the light device according to the first embodiment in a vehicle. FIG. 2 is a plan view showing an arrangement state of the light device according to the first embodiment in a vehicle. FIG. 2 is a front view showing an arrangement state of the light device according to the first embodiment in a vehicle. Side sectional view showing an example of the configuration of the light device according to the first embodiment. FIG. 2 is a plan view of the radar unit according to the first embodiment as viewed from above. FIG. 2 is a plan view showing a positional relationship between a radar unit and a lamp unit of the light device according to the first embodiment. An upper perspective view showing a positional relationship between a radar unit and a lamp unit of the light device according to the first embodiment. Side sectional view showing an example of a configuration of a light device according to a second embodiment. Side sectional view showing an example of the configuration of a light device according to a third embodiment. Side sectional view showing an example of a configuration of a light device according to a fourth embodiment. Side sectional view showing an example of a configuration of a light device according to a fifth embodiment.

  Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same function are denoted by the same reference numerals, and redundant description is omitted.

  In each figure, in order to clarify the positional relationship of each component, the radar device (corresponding to the radar unit of the present invention) refers to the forward direction of transmitting electromagnetic waves to the outside of the device (that is, the direction in which an object is detected). Represents a common rectangular coordinate system (X, Y, Z). Hereinafter, the plus direction of the X axis indicates a forward direction (hereinafter, abbreviated as “forward direction” or “first direction”) in which the radar device transmits an electromagnetic wave to the outside of the device, and the plus direction of the Y axis indicates the direction of the radar device. The left direction (hereinafter, abbreviated as “left direction”) is described, and the plus direction of the Z axis is described as an upward direction of the radar apparatus (hereinafter, abbreviated as “upward direction”).

  In the following, the plus Z direction corresponds to the upward direction of the vehicle, and the direction toward the plus Y direction about 30 degrees from the plus X direction corresponds to the traveling direction of the vehicle.

(First embodiment)
Hereinafter, an example of a configuration of a vehicle-mounted light device (hereinafter, abbreviated as “light device”) according to the present embodiment will be described. The light device according to the present embodiment is applied to a headlight that illuminates the front of a vehicle. Here, only the configuration of the right headlight in front of the vehicle will be described.

  FIG. 1A is a perspective view showing an arrangement state of a light device U according to the present embodiment in a vehicle. FIG. 1B is a plan view showing an arrangement state of the light device U according to the present embodiment in a vehicle. FIG. 1C is a front view showing an arrangement state of the light device U according to the present embodiment in a vehicle.

  The light device U according to the present embodiment includes a radar unit 10 and lamp units 20a, 20b, and 20c.

  In the light device U according to the present embodiment, three lamp units 20a, 20b, and 20c are disposed adjacent to each other along the left-right direction, and the radar unit 10 includes the lamp units 20a, 20b, and 20c. It is arranged on the lower side.

  The radar unit 10 according to the present embodiment transmits an electromagnetic wave obliquely rightward (plus X direction) with respect to the traveling direction of the vehicle and detects an object existing in the direction. Then, a radar unit (not shown) built in the left headlight detects an object existing diagonally to the left with respect to the traveling direction of the vehicle.

  FIG. 2 is a side sectional view showing an example of the configuration of the light device U according to the present embodiment. FIG. 3 is a plan view of the radar unit 10 according to the present embodiment as viewed from above. FIG. 4 is a plan view showing the positional relationship between the radar unit 10 and the lamp units 20a, 20b, 20c of the light device U according to the present embodiment. FIG. 5 is an upper perspective view showing the positional relationship between the radar unit 10 and the lamp units 20a, 20b, 20c of the light device U according to the present embodiment. 4 and 5, illustration of the separator 14 is omitted.

  The lamp unit 20a includes a light source 21a and a reflector 22a. The lamp unit 20a is housed in the lamp housing 30 together with the lamp units 20b and 20c.

  The lamp housing 30 forms a storage space in the front end region of the vehicle, and stores the lamp units 20a, 20b, and 20c in the storage space. Further, the lamp housing 30 has a front cover 30a that covers the front of the storage space. The lamp housing 30 is formed of, for example, a resin material (for example, polycarbonate or the like). The front cover 30a is formed of, for example, a resin material (for example, polycarbonate or the like) having a light-transmitting property.

  The light source 21a is, for example, an incandescent light bulb, and emits light forward (here, about 30 degrees from the plus X direction toward the minus Y side). The light source 21 a is attached to a rear side wall of the lamp housing 30. Note that a light source having a condenser lens may be used as the light source 21a.

  The reflector 22a is provided so as to surround the periphery of the light source 21a, condenses the light emitted from the light source 21a, and adjusts the irradiation range of the light. The reflector 22a is formed of, for example, a quadrangular pyramid-shaped cylindrical member whose opening is directed toward the front side and whose opening diameter increases toward the front side. The reflector 22a is formed of, for example, a metal member such as an aluminum material. Further, the reflector 22a may be formed by metallizing a resin member.

  The lamp units 20b and 20c have the same configuration as the lamp unit 20a, and are configured by light sources 21b and 21c and reflectors 22b and 22c surrounding the light sources 21b and 21c, respectively. The lamp units 20a, 20b, and 20c are equipped with, for example, a system called an adaptive high beam system that automatically shifts the irradiation area of the headlight.

  In the following, any one of the lamp unit 20a, the lamp unit 20b, and the lamp unit 20c is abbreviated as "the lamp unit 20," "the light source 21," and "the reflector 22" unless otherwise specified.

  The radar unit 10 includes a circuit board 11, an antenna unit 12, a signal processing IC 13, a separator 14, and a dielectric lens 15.

  The circuit board 11 is a board on which the antenna unit 12 and the signal processing IC 13 are mounted. As the circuit board 11, for example, a PCB (Printed Circuit Board) board or a semiconductor board with a built-in signal processing IC 13 is used.

  The circuit board 11 is disposed below the reflector 22 so that the board surface extends substantially in the horizontal direction from the viewpoint of miniaturization of the light device U. Here, "almost along the horizontal direction" includes not only a state in which the substrate surface is completely horizontal with respect to the ground, but also a state in which the substrate surface is inclined with respect to the ground. The circuit board 11 may be provided above the reflector 22.

  In other words, the radar unit 10 constitutes a horizontal millimeter-wave radar in which the circuit board 11 is disposed horizontally. Thereby, the radar unit 10 has a configuration thinner than the lamp unit 20 in the ± Z direction.

  The antenna unit 12 is disposed in a front region in the board surface of the circuit board 11, transmits the electromagnetic wave Ft forward (plus X direction), and reflects the electromagnetic wave reflected by the target and returned. The wave Fr is received.

  The antenna unit 12 is, for example, an end-fire array (End-fire Array) antenna having a directional characteristic in a direction toward the front end of the circuit board 11. The end fire array antenna includes a plurality of strip conductors arranged so that their longitudinal directions are parallel to each other, and transmits and receives electromagnetic waves along the direction in which the plurality of strip conductors are arranged. The antenna unit 12 includes, for example, six end fire array antennas (hereinafter, also referred to as “antenna elements”) arranged adjacently along the ± Y direction. The antenna unit 12 is configured as a phased array antenna by the six antenna elements.

  The antenna unit 12 is provided on the front side (that is, the vehicle exterior side) of the reflector 22. That is, the antenna section 12 is disposed so as not to overlap with the reflector 22 in plan view. This avoids a state in which the antenna unit 12 and the reflector 22 face each other, and suppresses the generation of a standing wave between the antenna unit 12 and the reflector 22.

  The array direction of the plurality of antenna elements constituting the antenna section 12 is arranged so as to be non-parallel to the extending direction of the front ends 22aa, 22ba, 22ca of the reflector 22 in plan view (FIG. 4, See FIG. 5). More preferably, the array direction of the antenna unit 12 is an angle of 9 degrees or more and 171 degrees or less with respect to the extending direction of the front ends 22aa, 22ba, and 22ca of the reflector 22 in plan view (θ in FIG. 4). ) Is set. Thus, when the reflected waves arriving at the front ends 22aa, 22ba, 22ca of the reflector 22 are reflected again by the front ends 22aa, 22ba, 22ca of the reflector 22, the reflected waves are separated from the position where the antenna unit 12 is disposed (here, In this case, the light is diffused in the plus Y direction or the minus Y direction). In other words, the amount of the multiple reflection components of the reflected wave arriving at the antenna unit 12 can be suppressed.

  The signal processing IC 13 transmits, for example, a high-frequency drive signal to the antenna unit 12 to cause the antenna unit 12 to transmit an electromagnetic wave Ft (for example, an electromagnetic wave in a millimeter-wave band), or relates to a reflected wave received by the antenna unit 12. Performs reception processing of the reception signal. The signal processing IC 13 performs reception processing (for example, detection processing and frequency analysis processing) to detect the distance to the target (for example, a vehicle or a person), the direction in which the target exists, and the reflection intensity and speed of the target. Is performed. Here, the reception processing by the signal processing IC 13 is the same as a known configuration, and therefore, detailed description is omitted here.

  The separator 14 is provided so as to partition a space between the lamp unit 20 and the radar unit 10 and shields transmission of radiant heat and electromagnetic waves between the lamp unit 20 and the radar unit 10. The separator 14 according to the present embodiment is disposed so as to surround the periphery of the circuit board 11, and also functions as a radar housing (hereinafter, also referred to as "radar housing 14") that houses the circuit board 11. . The separator 14 is mounted on the lower surface of the lamp housing 30 using a fixing member (for example, a screw) with the circuit board 11 housed therein.

  In particular, the separator 14 suppresses the radiant heat emitted from the light source 21 from propagating to the circuit board 11 (for example, the signal processing IC 13), and the electromagnetic wave arriving from the front and reflected by the reflector 22 propagates to the antenna unit 12. To do so. The radiant heat transmitted to the separator 14 is diffused, for example, to the whole of the separator 14 and dissipated to a member contacting the separator 14 and an external space. This suppresses radiant heat emitted from the light source 21 from overheating the signal processing IC 13 mounted on the circuit board 11.

  Further, the separator 14 suppresses the propagation of the reflected wave reflected by the target and returned to the antenna unit 12 when the reflected wave is reflected again by the reflector 22. The separator 14 also functions to shield the side lobe component of the electromagnetic wave emitted from the antenna unit 12 from traveling toward the light source 21 (for example, a control circuit (not shown) that controls the light source 21).

  The material of the separator 14 is not limited as long as it is a member that can shield the transmission of radiant heat and electromagnetic waves. Typically, a metal member (for example, aluminum or copper) is used. As a material of the separator 14, from the viewpoint of promoting heat diffusion, a material having a higher thermal conductivity than a material of the lamp housing 30 (for example, a resin material) is desirable, and a metal member such as aluminum is more desirable. On the other hand, the separator 14 may be configured by a combination of a material having a high thermal conductivity (for example, a carbon-containing member) and a member capable of blocking transmission of electromagnetic waves.

  The dielectric lens 15 is attached to a window formed on the front surface of the radar housing 14 (separator 14). The reflected wave is focused on the antenna unit 12.

  As the dielectric lens 15, for example, a semi-cylindrical or parabolic lens having a convex in the plus X direction and extending along the ± Y direction is used. Since the semi-cylindrical or parabolic cylindrical dielectric lens 15 has substantially the same cross-sectional shape at any position in the ± Y direction (also referred to as a semicylindrical shape), This is preferable in that the refraction angles of the reflected waves arriving at different positions in the Y direction can be made the same. This suppresses a situation in which reflected waves arriving from the outside of the device enter the antenna unit 12 from various directions (for example, the plus Y direction side and the minus Y direction side with respect to the antenna unit 12). That is, this prevents the accuracy of the object detection from deteriorating (for example, the accuracy deteriorating due to mutual interference or the accuracy deteriorating due to a change in the phase difference).

[effect]
As described above, the in-vehicle light device U according to the present embodiment includes the lamp unit 20 including the light source 21 that emits light in the first direction (here, forward), and the reflector 22 surrounding the light source 21, On the lower side or the upper side of the lamp unit 20, a circuit board 11 arranged so that the board surface extends horizontally, and the circuit board 11 is arranged on the board surface of the circuit board 11 in the first direction side with respect to the reflector 22. A radar unit 10 having an antenna unit 12 for transmitting an electromagnetic wave in the first direction and receiving a reflected wave thereof is provided, and is arranged so as to partition a space between the lamp unit 20 and the radar unit 10. And a separator 14 that shields the transmission of radiant heat and electromagnetic waves between the radar unit 10 and the radar unit 10.

  Therefore, according to the in-vehicle light device U according to the present embodiment, the radiant heat from the light source 21 of the lamp unit 20 can be suppressed from being transmitted to the radar unit 10 by the separator 14. As a result, it is possible to suppress the occurrence of malfunction of the radar unit 10 due to the influence of heat.

  Further, according to the on-vehicle light device U according to the present embodiment, of the reflected waves from the target, the electromagnetic waves re-reflected by the reflector 22 (multiple reflection components of the reflected waves) propagate to the antenna unit 12 by the separator 14. Can be suppressed. Thus, it is possible to suppress a situation in which the multiple reflection component of the reflected wave is superimposed on the reflected wave that directly arrives at the antenna unit 12 from the target, thereby deteriorating the reception characteristics of the antenna unit 12.

(Second embodiment)
Next, a configuration of a light device U according to the second embodiment will be described with reference to FIG. The light device U according to the present embodiment differs from the first embodiment in the structure of the separator 14. The description of the configuration common to the first embodiment is omitted (the same applies to other embodiments below).

  FIG. 6 is a side sectional view showing an example of the configuration of the light device U according to the second embodiment.

  The separator 14 according to the present embodiment has a first extension portion 14a extending to the front side of the circuit board 11, and the first extension portion 14a allows the dielectric lens 15 (that is, the cover member) and the first extension portion 14a. It is configured to be in contact with the front cover 30a. More specifically, the first extending portion 14a extends to a position where it contacts the front end surface of the dielectric lens 15 and the front end surface of the front cover 30a.

  The separator 14 according to the present embodiment absorbs radiant heat emitted from the light source 21 and transfers the heat to the front end face of the dielectric lens 15 and the front end face of the front end cover via the first extending portion 14a. It also functions to raise the temperature of the front end face of the dielectric lens 15 and the front end face of the front cover 30a. That is, in the present embodiment, the heat of the separator 14 is used for defrosting, preventing fogging, or preventing snow accumulation on the front end surface of the dielectric lens 15 and the front end surface of the front cover 30a.

  Here, the first extending portion 14a of the separator 14 is configured to be in contact with both the front end face of the dielectric lens 15 and the front end face of the front cover 30a, but at least the front end face of the dielectric lens 15 is provided. May be configured to be in contact with. On the other hand, the first extending portion 14a is also suitable for a case where another cover member is used in place of the dielectric lens in front of the antenna portion 12.

  As described above, according to the light device U according to the present embodiment, it is possible to use the radiant heat generated by the light source 21 to raise the temperature of the dielectric lens 15 exposed outside the vehicle. Accordingly, it is possible to prevent the snow and the like from adhering to the dielectric lens 15. As a result, it is possible to improve the output gain and the reception gain of the antenna unit 12.

(Third embodiment)
Next, a light device U according to a third embodiment will be described with reference to FIG. The light device U according to the present embodiment differs from the first embodiment in the structure of the separator 14.

  FIG. 7 is a side cross-sectional view illustrating an example of a configuration of a light device U according to the third embodiment.

  The separator 14 according to the present embodiment has a second extending portion 14b extending from a region above the circuit board 11 to a rear side behind the circuit board 11. The second extending portion 14b has a structure extending so as to be inclined downward with respect to the horizontal direction. With such a configuration, the second extending portion 14b re-reflects a component of the reflected wave from the target toward the rear of the circuit board 11 so as to warp downward, and the reflected wave again It is suppressed to go from the rear side to the antenna section 12 side. This can prevent the antenna unit 12 from detecting a reflected wave from behind the circuit board 11.

  When the circuit board 11 is disposed above the reflector 22, the second extending portion 14b has a structure extending so as to be inclined upward with respect to the horizontal direction.

  As described above, according to the light device U according to the present embodiment, it is possible to suppress electromagnetic waves that reach the antenna unit 12 due to multiple reflection, and improve the reception characteristics of the antenna unit 12.

(Fourth embodiment)
Next, a writing device U according to a fourth embodiment will be described with reference to FIG. The light device U according to the present embodiment differs from the first embodiment in the structure of the separator 14.

  FIG. 8 is a side cross-sectional view illustrating an example of a configuration of a light device U according to the fourth embodiment.

  The separator 14 according to the present embodiment has a third extension portion 14c that extends away from the antenna portion 12 toward the front on the front side of the circuit board 11. The third extending portion 14c has a shape that is inclined upward as it goes forward. That is, the shape of the separator 14 according to the present embodiment is set such that the opening diameter of the window through which the antenna unit 12 transmits and receives electromagnetic waves becomes larger toward the front side.

  Thus, while the separator 14 (that is, the radar housing) is downsized, when the antenna unit 12 transmits an electromagnetic wave, a component of the electromagnetic wave transmitted from the antenna unit 12 that spreads in the radiation direction is reflected by the separator 14. Thus, it is possible to suppress a decrease in the output gain of the antenna unit 12.

  As described above, according to the light device U according to the present embodiment, it is possible to reduce the output gain of the antenna unit 12 due to the reflection of the electromagnetic wave on the separator 14 while reducing the size of the entire device.

(Fifth embodiment)
Next, a writing device U according to a fifth embodiment will be described with reference to FIG. The light device U according to the present embodiment differs from the first embodiment in that the separator 14 has an electromagnetic wave absorbing material 14d.

  FIG. 9 is a side cross-sectional view illustrating an example of a configuration of a light device U according to the fifth embodiment.

  The separator 14 according to the present embodiment has an electromagnetic wave absorber 14d between itself and the circuit board 11 on the inner wall surface. The electromagnetic wave absorber 14d absorbs a component of the reflected wave from the target toward the rear side of the antenna unit 12 and suppresses the reflected wave from being multiply reflected between the separator 14 and the circuit board 11.

  Examples of the material of the electromagnetic wave absorbing material 14d include a conductive absorbing material that absorbs a current generated by an electromagnetic wave due to a resistance loss inside the material, and a dielectric electromagnetic wave absorbing material that uses a dielectric loss caused by a polarization reaction of molecules (for example, carbon). Alternatively, a magnetic wave absorbing material (for example, iron, nickel, or ferrite) that absorbs a radio wave due to magnetic loss of the magnetic material is used.

  Further, as a material of the electromagnetic wave absorbing material 14d, a material having high thermal conductivity, for example, a graphite sheet or the like may be used.

  As described above, according to the light device U according to the present embodiment, it is possible to suppress electromagnetic waves that reach the antenna unit 12 due to multiple reflection, and improve the reception characteristics of the antenna unit 12.

(Other embodiments)
The present invention is not limited to the above embodiment, and various modifications can be made.

  In the above embodiment, various examples of the configuration of the light device U have been described. However, it is needless to say that various combinations of the modes shown in the embodiments may be used.

  Further, in the above embodiment, the headlight is described as an example of an application target of the light device U. However, the light device U according to the present invention can be applied to a tail light, a small light, and the like.

  Further, in the above-described embodiment, as an example of the light device U, a mode in which the horizontal type radar unit 10 using the end fire array antenna is used has been described. However, the light device U according to the present invention is not limited to the horizontal type radar unit 10, but can be applied to a vertical type radar unit using a patch antenna or the like having a directional characteristic in a direction normal to the substrate surface. .

  Further, in the above-described embodiment, as an example of the arrangement position of the circuit board 11, the mode in which the circuit board 11 is located below the reflector 22 is described. However, the arrangement position of the circuit board 11 may be located above the reflector 22. Good. In this case, the disposition position of the separator 14 is on the lower surface side of the circuit board 11.

  In the above-described embodiment, the end fire array antenna has been described as an example of the antenna element included in the antenna unit 12. However, the antenna unit 12 only needs to be configured by a conductor pattern formed on the circuit board 11, and in addition to the end fire array antenna, a Yagi array antenna, a Fermi antenna, a post wall waveguide antenna, or a post wall antenna. It may be constituted by a wall horn antenna or the like.

  In the above embodiment, a semi-cylindrical lens is shown as an example of the shape of the dielectric lens 15. However, as the shape of the dielectric lens 15, a dome-shaped lens, a biconvex lens, a ball lens, a Fresnel lens, a combination thereof, a concave lens and a combination thereof, or the like may be applied. In addition, a concave lens that diffuses an electromagnetic wave transmitted from the antenna unit 12 may be applied as the dielectric lens 15.

  Further, in the above-described embodiment, an example having three lamp units 20 has been described as an example of the light device U. However, the vehicle-mounted light device U according to the present invention may have a configuration having only one lamp unit 20.

  As mentioned above, although the specific example of this invention was demonstrated in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  According to the vehicle-mounted light device according to the present disclosure, it is possible to suppress the propagation of radiant heat and electromagnetic waves from the lamp side to the radar device side.

U vehicle-mounted light device 10 radar unit 11 circuit board 12 antenna unit 13 signal processing IC
Reference Signs List 14 separator 14a first extension portion 14b second extension portion 14c third extension portion 14d electromagnetic wave absorbing material 15 dielectric lens 20a, 20b, 20c lamp unit 21a, 21b, 21c light source 22a, 22b, 22c reflector 30 lamp housing Body 30a Front cover

Claims (8)

An on-vehicle light device for monitoring an area in a first direction outside a vehicle,
A light source that emits light in the first direction, and a lamp unit having a reflector surrounding the light source;
A circuit board disposed on a lower side or an upper side of the lamp unit such that a board surface extends substantially in a horizontal direction, and the first direction side of the reflector within the board surface of the circuit board. A radar unit having an antenna unit arranged to transmit an electromagnetic wave in the first direction and receive the reflected wave;
A separator that is arranged to partition a space between the lamp unit and the radar unit, and that blocks transmission of radiant heat and electromagnetic waves between the lamp unit and the radar unit,
A vehicle-mounted light device comprising: The separator is made of a material having a higher thermal conductivity than a lamp housing that stores the lamp unit,
The vehicle-mounted light device according to claim 1. The separator is constituted by a metal member,
The vehicle-mounted light device according to claim 1. The separator has a first extension that extends to the first direction side with respect to the circuit board, and is disposed in the first extension so as to cover a region through which the electromagnetic wave passes. Contact with the cover member,
The vehicle-mounted light device according to claim 1. The separator has a second extending portion extending to a back surface side of the circuit board in a direction opposite to the first direction, and the second extending portion has a second extending portion extending from the first direction side to the circuit board. The electromagnetic wave arriving at the back side is reflected downward or upward,
An in-vehicle light device according to any one of claims 1 to 4. The separator has a third extension on the first direction side of the circuit board, the third extension extending away from the antenna unit toward the first direction.
The vehicle-mounted light device according to claim 1. The separator is configured to include a member having electromagnetic wave absorption characteristics,
An in-vehicle light device according to any one of claims 1 to 6. The antenna unit is configured by an end fire array antenna,
The vehicle-mounted light device according to claim 1.

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