JP7129649B2 - In-vehicle light device - Google Patents

Description

The present disclosure relates to an in-vehicle light device.

Conventionally, there is known an in-vehicle light device in which a millimeter wave radar (hereinafter also referred to as a "radar device") is integrally arranged with a lamp (for example, a headlight or a backlight) for illuminating the outside of the vehicle (for example, , see Patent Document 1).

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

JP 2008-186741 A

By the way, in this type of on-vehicle light device, the radar device and the light source of the lamp are arranged close to each other. Therefore, in the vehicle light device according to the prior art, there is a problem that electronic components such as a microcomputer of the radar device are damaged by the radiant heat from the light source, and the operation of the radar device becomes unstable.

Further, in the conventional in-vehicle light device, the electromagnetic wave that is transmitted from the radar device, reflected by the target, and returned is collected by the reflector of the lamp (light source) to control the irradiation range of the light. There is a risk that the light will be reflected again by the reflecting member) and reach the antenna section of the radar device. In particular, since the reflector is a reflective member having a planar spread, it causes multiple reflections with the circuit board or the like on which the antenna section is arranged, and generates a standing wave between the reflector and the antenna section. There is a risk. When such a standing wave is superimposed on electromagnetic waves that directly arrive at the antenna section from the target, a blind area is created in the reception characteristics of the antenna section where the target cannot be detected.

An object of the present disclosure is to provide an in-vehicle light device capable of suppressing propagation of radiant heat and electromagnetic waves from the lamp side to the radar device side while integrally configuring the radar device and the lamp.

The main disclosure that solves the above-mentioned problems is
An in-vehicle light device for monitoring an area outside the vehicle in a first direction,
a lighting unit including a light source that emits light in the first direction and a reflector that surrounds the light source;
a circuit board disposed on the lower side or the upper side of the lamp unit so that the board surface thereof extends along a substantially horizontal direction; a radar unit disposed in the first direction and having an antenna unit for transmitting electromagnetic waves in the first direction and receiving the reflected waves;
a separator arranged to partition a space between the lighting unit and the radar unit and shielding transmission of radiant heat and electromagnetic waves between the lighting unit and the radar unit;
An in-vehicle light device comprising:

According to the in-vehicle light device according to the present disclosure, propagation of radiant heat and electromagnetic waves from the lamp side to the radar device side can be suppressed.

1 is a perspective view showing a state of arrangement of a light device in a vehicle according to the first embodiment; FIG. FIG. 2 is a plan view showing the arrangement of the light device in the vehicle according to the first embodiment; FIG. 2 is a front view showing the arrangement state of the light device in the vehicle according to the first embodiment; 1 is a side cross-sectional view showing an example of the configuration of a light device according to a first embodiment; FIG. FIG. 2 is a plan view of the radar unit according to the first embodiment viewed from above; FIG. 2 is a plan view showing the positional relationship between the radar unit and the lamp unit of the light device according to the first embodiment; FIG. 2 is an upper perspective view showing the positional relationship between the radar unit and the lamp unit of the light device according to the first embodiment; A cross-sectional side view showing an example of the configuration of a light device according to a second embodiment. Side cross-sectional view showing an example of the configuration of a light device according to a third embodiment A cross-sectional side view showing an example of the configuration of a light device according to a fourth embodiment. A cross-sectional side view showing an example of the configuration of a light device according to a fifth embodiment.

Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In the present specification and drawings, constituent elements having substantially the same functions are denoted by the same reference numerals, thereby omitting redundant description.

In each figure, in order to clarify the positional relationship of each configuration, the forward direction in which the radar device (corresponding to the radar unit of the present invention) transmits electromagnetic waves to the outside of the device (that is, the direction in which objects are detected) is shown as a reference. indicates a common orthogonal coordinate system (X, Y, Z). Hereinafter, the positive direction of the X-axis represents the forward direction in which the radar device transmits electromagnetic waves to the outside of the device (hereinafter abbreviated as “forward direction” or “first direction”), and the positive direction of the Y-axis represents the direction of the radar device. The leftward direction (hereinafter abbreviated as “leftward”) is represented, and the positive direction of the Z-axis represents the upward direction (hereinafter abbreviated as “upward”) of the radar device.

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

(First embodiment)
An example of the configuration of an in-vehicle light device (hereinafter abbreviated as "light device") according to the present embodiment will be described below. A light device according to this 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 this embodiment in a vehicle. FIG. 1B is a plan view showing an arrangement state of the light device U according to this embodiment in a vehicle. FIG. 1C is a front view showing an arrangement state of the light device U according to this embodiment in a vehicle.

The light device U according to this 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 arranged adjacent to each other along the left-right direction, and the radar unit 10 is arranged adjacent to the lamp units 20a, 20b, and 20c. It is arranged on the lower side.

The radar unit 10 according to the present embodiment transmits electromagnetic waves diagonally to the right (plus X direction) with respect to the traveling direction of the vehicle, and detects an object present in that direction. A radar unit (not shown) built into the left headlight detects an object existing obliquely 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 this embodiment. FIG. 3 is a top plan view of the radar unit 10 according to this embodiment. FIG. 4 is a plan view showing the positional relationship between the radar unit 10 and lamp units 20a, 20b, and 20c of the light device U according to this embodiment. FIG. 5 is an upper perspective view showing the positional relationship between the radar unit 10 and lamp units 20a, 20b, and 20c of the light device U according to this 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 made of, for example, a resin material (for example, polycarbonate or the like). Further, the front cover 30a is made of, for example, a light-transmissive resin material (for example, polycarbonate or the like).

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

The reflector 22a is arranged so as to surround the light source 21a, collects the light emitted from the light source 21a, and adjusts the irradiation range of the light. The reflector 22a is composed of, for example, a quadrangular pyramid-shaped tubular member having an opening facing forward and having an opening diameter that increases toward the front side. In addition, the reflector 22a is formed of, for example, a metal member such as an aluminum material. Also, 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 respectively composed of light sources 21b and 21c and reflectors 22b and 22c surrounding the light sources 21b and 21c. The lighting units 20a, 20b, and 20c are equipped with a system called an adaptive high beam system, which automatically shifts the irradiation area of the headlights.

Hereinafter, any one of the lighting unit 20a, the lighting unit 20b, and the lighting unit 20c will be abbreviated as “the lighting unit 20,” the “light source 21,” and the “reflector 22,” unless otherwise distinguished.

The radar unit 10 includes a circuit board 11 , an antenna section 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 section 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 containing a signal processing IC 13 is used.

From the viewpoint of miniaturization of the light device U, the circuit board 11 is arranged below the reflector 22 so that the board surface extends along the substantially horizontal direction. Here, "along the substantially 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. Note that the circuit board 11 may be arranged above the reflector 22 .

In other words, the radar unit 10 constitutes a horizontal milliwave radar in which the circuit board 11 is arranged horizontally. As a result, the radar unit 10 is thinner than the lamp unit 20 in the ±Z directions.

The antenna unit 12 is disposed in the front region within the board surface of the circuit board 11, transmits an electromagnetic wave Ft forward (in the plus X direction), and reflects the electromagnetic wave Ft from a target to return. Receive wave Fr.

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

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

The array direction of the plurality of antenna elements forming the antenna section 12 is arranged so as to be non-parallel to the extending direction of the front end portions 22aa, 22ba, and 22ca of the reflector 22 in plan view (FIGS. See Figure 5). More preferably, the array direction of the antenna section 12 is at an angle of 9 degrees or more and 171 degrees or less (θ ). As a result, the reflected waves arriving at the front end portions 22aa, 22ba, and 22ca of the reflector 22 are reflected again by the front end portions 22aa, 22ba, and 22ca of the reflector 22 in a direction away from the arrangement position of the antenna portion 12 (here Then, it diffuses in the plus Y direction or the minus Y direction). In other words, this makes it possible to suppress the amount of multiple reflection components of the reflected waves arriving at the antenna section 12 .

For example, the signal processing IC 13 sends 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 to transmit a reflected wave received by the antenna unit 12. Performs reception processing for received signals. Then, the reception processing (for example, detection processing and frequency analysis processing) by the signal processing IC 13 detects the distance to the target (for example, a vehicle or person), the direction in which the target exists, and the reflection intensity and speed of the target. is done. Here, since the reception processing by the signal processing IC 13 is the same as the well-known configuration, detailed description is omitted here.

The separator 14 is arranged to partition the space between the lighting unit 20 and the radar unit 10 and shields the transmission of radiant heat and electromagnetic waves between the lighting unit 20 and the radar unit 10 . The separator 14 according to the present embodiment is arranged so as to surround 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 with the circuit board 11 accommodated therein is attached to the lower surface of the lamp housing 30 using a fixing member (for example, a screw).

In particular, the separator 14 suppresses the propagation of radiant heat emitted from the light source 21 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 section 12. restrain from doing. The radiant heat transmitted to the separator 14 is diffused, for example, throughout the separator 14 and dissipated to members in contact with the separator 14 and the external space. This prevents the radiant heat emitted from the light source 21 from overheating the signal processing IC 13 mounted on the circuit board 11 .

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

Any material can be used for the separator 14 as long as it can shield the transmission of radiant heat and electromagnetic waves, but typically, a metal member (for example, aluminum or copper) is used. From the viewpoint of promoting heat diffusion, the material of the separator 14 is preferably a material having a higher thermal conductivity than the material (eg, resin material) of the lamp housing 30, and more preferably a metal member such as aluminum. On the other hand, the separator 14 may be composed of a combination of a material with high thermal conductivity (for example, a carbon-containing member) and a member capable of shielding the 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), narrows the beam of the electromagnetic wave Ft transmitted by the antenna unit 12, forwards the beam, and returns from the target. Reflected waves are focused on the antenna section 12 .

As the dielectric lens 15, for example, a semi-cylindrical or parabolic cylindrical lens that is convex in the plus X direction and extends along the ±Y directions is used. Such a semi-cylindrical or parabolic cylindrical dielectric lens 15 has a cross-sectional shape of the side surface of substantially the same shape (also referred to as a semi-cylindrical shape) at any position in the ±Y direction. This is preferable in that the reflected waves arriving at different positions in the Y direction can have the same angle of refraction. As a result, reflected waves arriving from the outside of the apparatus are prevented from entering the antenna section 12 from various directions (for example, the plus Y direction side and the minus Y direction side with respect to the antenna section 12). In other words, this prevents deterioration of object detection accuracy (for example, deterioration of accuracy due to mutual interference or deterioration of accuracy due to a change in phase difference).

[effect]
As described above, the vehicle-mounted light device U according to the present embodiment includes a lighting unit 20 having a light source 21 that emits light in a first direction (here, forward) and a reflector 22 that surrounds the light source 21, The circuit board 11 is arranged so that the board surface extends horizontally on the lower side or the upper side of the lamp unit 20, and the reflector 22 is arranged in the board surface of the circuit board 11 on the first direction side. a radar unit 10 having an antenna part 12 for transmitting electromagnetic waves in a first direction and receiving the reflected waves; and a separator 14 for shielding 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 separator 14 can suppress transmission of radiant heat from the light source 21 of the lamp unit 20 to the radar unit 10 . 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 in-vehicle light device U according to the present embodiment, the separator 14 causes the electromagnetic wave (multiple reflection component of the reflected wave) re-reflected by the reflector 22 among the reflected waves from the target to propagate to the antenna section 12 . can be suppressed. As a result, it is possible to suppress a situation in which the multiple reflection component of the reflected wave is superimposed on the reflected wave directly arriving at the antenna section 12 from the target and the reception characteristics of the antenna section 12 are deteriorated.

(Second embodiment)
Next, the configuration of the light device U according to the second embodiment will be described with reference to FIG. The light device U according to this embodiment differs from that of 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 that extends to the front side of the circuit board 11, and the dielectric lens 15 (that is, the cover member) and the dielectric lens 15 (that is, the cover member) 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 the radiant heat emitted from the light source 21 and transfers the heat to the front end surface of the dielectric lens 15 and the front end cover through the first extension portion 14a. , 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 the front end surface of the dielectric lens 15 and the front end surface of the front cover 30a, preventing fogging, or preventing snow from accumulating.

Here, the first extending portion 14a of the separator 14 is configured to contact both the front end surface of the dielectric lens 15 and the front end surface of the front cover 30a. It may be configured to contact with. On the other hand, the first extending portion 14a is suitable also when another cover member is used in place of the dielectric lens in front of the antenna portion 12. FIG.

As described above, according to the light device U according to the present embodiment, it is possible to heat the dielectric lens 15 exposed to the outside of the vehicle by using the radiant heat emitted by the light source 21 . As a result, it is possible to prevent ice, snow, etc. from adhering to the dielectric lens 15 . This makes it possible to improve the output gain and reception gain in the antenna section 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 this embodiment differs from that of the first embodiment in the structure of the separator 14 .

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

The separator 14 according to the present embodiment has a second extending portion 14b extending from the upper region of the circuit board 11 to the back side of the circuit board 11 behind. Further, 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 the component of the reflected wave from the target toward the rear of the circuit board 11 so as to bend downward. It suppresses going to the antenna part 12 side from the rear side. As a result, it is possible to suppress detection of a reflected wave from behind the circuit board 11 by the antenna section 12 .

When the circuit board 11 is arranged above the reflector 22, the second extending portion 14b extends 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 reaching the antenna section 12 due to multiple reflections, and improve reception characteristics in the antenna section 12 .

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

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

The separator 14 according to the present embodiment has a third extending portion 14c on the front side of the circuit board 11 that extends away from the antenna portion 12 toward the front. The third extending portion 14c has a shape that slopes upward toward the front. That is, the shape of the separator 14 according to the present embodiment is set so that the opening diameter of the window for the antenna 12 to transmit and receive electromagnetic waves increases toward the front side.

As a result, the separator 14 (that is, the radar housing) can be miniaturized, and when the antenna unit 12 transmits electromagnetic waves, the components of the electromagnetic waves transmitted from the antenna unit 12 that spread in the radial direction are reflected by the separator 14. As a result, it is possible to suppress a decrease in the output gain of the antenna section 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 section 12 due to the reflection of electromagnetic waves on the separator 14 while miniaturizing the entire device.

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

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

The separator 14 according to this embodiment has an electromagnetic wave absorbing material 14d between the inner wall surface of the separator 14 and the circuit board 11. As shown in FIG. The electromagnetic wave absorber 14 d absorbs the component of the reflected wave from the target directed toward the rear side of the antenna section 12 , and suppresses the multiple reflection of the reflected wave between the separator 14 and the circuit board 11 .

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

In addition, as the material of the electromagnetic wave absorbing material 14d, a material having high thermal conductivity such as a graphite sheet may be used.

As described above, according to the light device U according to the present embodiment, it is possible to suppress electromagnetic waves reaching the antenna section 12 due to multiple reflections, and improve reception characteristics in the antenna section 12 .

(Other embodiments)
The present invention is not limited to the above-described embodiment, and various modifications are conceivable.

Various examples of the configuration of the light device U have been shown in the above embodiments. However, it is of course possible to use various combinations of aspects shown in the respective embodiments.

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

Further, in the above-described embodiment, as an example of the light device U, a mode using the horizontal radar unit 10 using the end-fire array antenna is shown. However, the light device U according to the present invention can be applied not only to the horizontal radar unit 10 but also to a vertical radar unit using a patch antenna or the like having directivity in the direction normal to the substrate surface. .

Further, in the above-described embodiment, as an example of the arrangement position of the circuit board 11, a mode in which the circuit board 11 is arranged below the reflector 22 is shown. good. In this case, the separator 14 is arranged on the lower surface side of the circuit board 11 .

Further, in the above-described embodiment, an end-fire array antenna is shown as an example of the antenna element that constitutes the antenna section 12 . However, the antenna section 12 may be configured by a conductor pattern formed on the circuit board 11. In addition to the end-fire array antenna, the antenna section 12 may be a Yagi array antenna, a Fermi antenna, a post wall waveguide antenna, or a post antenna. It may be configured by a wall horn antenna or the like.

Further, in the above-described 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 lens, a double convex lens, a ball lens, a Fresnel lens, or a combination thereof, or a concave lens and a combination thereof may be applied. In addition, as the dielectric lens 15, a concave lens that diffuses electromagnetic waves transmitted from the antenna section 12 may be applied.

Further, in the above-described embodiment, as an example of the light device U, an aspect having three lamp units 20 is shown. However, the in-vehicle light device U according to the present invention may be configured to have only one lamp unit 20 .

Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

According to the in-vehicle light device according to the present disclosure, propagation of radiant heat and electromagnetic waves from the lamp side to the radar device side can be suppressed.

U In-vehicle light device 10 Radar unit 11 Circuit board 12 Antenna unit 13 Signal processing IC
14 separator 14a first extension 14b second extension 14c third extension 14d electromagnetic wave absorber 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 (4)

An in-vehicle light device for monitoring an area outside the vehicle in a first direction,
a lighting unit including a light source that emits light in the first direction and a reflector that surrounds the light source;
a circuit board disposed on the lower side or the upper side of the lamp unit so that the board surface thereof extends along a substantially horizontal direction; a radar unit disposed in the first direction and having an antenna unit for transmitting electromagnetic waves in the first direction and receiving the reflected waves;
a separator arranged to partition a space between the lighting unit and the radar unit and shielding transmission of radiant heat and electromagnetic waves between the lighting unit and the radar unit;
with
The separator is composed of a metal member,
The separator has a first extension portion extending to the first direction side from the circuit board, and is disposed so as to cover a region through which the electromagnetic waves pass with the first extension portion. in contact with the cover member;
In-vehicle light device. An in-vehicle light device for monitoring an area outside the vehicle in a first direction,
a lighting unit including a light source that emits light in the first direction and a reflector that surrounds the light source;
a circuit board disposed on the lower side or the upper side of the lamp unit so that the board surface thereof extends along a substantially horizontal direction; a radar unit disposed in the first direction and having an antenna unit for transmitting electromagnetic waves in the first direction and receiving the reflected waves;
a separator arranged to partition a space between the lighting unit and the radar unit and shielding transmission of radiant heat and electromagnetic waves between the lighting unit and the radar unit;
with
The separator is composed of a metal member,
The separator has a second extending portion that extends to the back side of the circuit board in a direction opposite to the first direction, and the second extending portion extends from the first direction side of the circuit board. Reflecting the electromagnetic wave arriving to the back side to the lower side or the upper side;
In-vehicle light device. An in-vehicle light device for monitoring an area outside the vehicle in a first direction,
a lighting unit including a light source that emits light in the first direction and a reflector that surrounds the light source;
a circuit board disposed on the lower side or the upper side of the lamp unit so that the board surface thereof extends along a substantially horizontal direction; a radar unit disposed in the first direction and having an antenna unit for transmitting electromagnetic waves in the first direction and receiving the reflected waves;
a separator arranged to partition a space between the lighting unit and the radar unit and shielding transmission of radiant heat and electromagnetic waves between the lighting unit and the radar unit;
with
The separator is composed of a metal member,
The separator has a third extending portion extending away from the antenna portion toward the first direction on the first direction side of the circuit board,
In-vehicle light device. The antenna unit is configured by an end fire array antenna,
The in-vehicle light device according to any one of claims 1 to 3 .

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