JP7108853B2 - Light source unit and vehicle - Google Patents

Description

The present invention relates to a light source unit and a vehicle provided with the light source unit.

2. Description of the Related Art Conventionally, there is a lighting device that is arranged in a vehicle and emits light toward the road surface around the vehicle (see, for example, Patent Document 1).

For example, Patent Literature 1 discloses a lighting device provided in a side mirror to illuminate the feet of passengers outside the vehicle.

JP 2015-71386 A

A lighting device (light source unit) that is mounted on a vehicle, for example, is required to have high heat dissipation, like a conventional lighting device.

The present invention provides a light source unit and the like with improved heat dissipation.

A light source unit according to an aspect of the present invention includes a substrate, an infrared light source mounted on the substrate, a housing that houses the infrared light source, a housing that covers the infrared light source, and the infrared light source a lens that transmits infrared light to be irradiated, the lens having an edge in contact with the substrate and being spaced apart from the infrared light source.

Further, a vehicle according to an aspect of the present invention includes the light source unit described above, which is attached to the vehicle so that the light emission surface of the lens is exposed from the outer surface of the vehicle, and the light emission surface of the lens is It is the same color as the outer surface of the vehicle.

According to the light source unit and the like according to one aspect of the present invention, heat dissipation is improved.

FIG. 1 is a front view showing a vehicle equipped with a light source unit according to Embodiment 1. FIG. FIG. 2 is a side view showing an enlarged side mirror included in the vehicle according to Embodiment 1. FIG. 3 is a cross-sectional view showing a cross section of the light source unit according to Embodiment 1, taken along line III-III of FIG. 2. FIG. FIG. 4 is a cross-sectional view showing a cross section of the light source unit according to Embodiment 2, corresponding to the cross section taken along line III-III of FIG. FIG. 5 is a cross-sectional view showing a cross-section of the light source unit according to Embodiment 3, corresponding to the cross-section taken along line III-III in FIG. FIG. 6 is a cross-sectional view showing a cross-section of the light source unit according to Embodiment 4, corresponding to the cross-section taken along line III-III of FIG. FIG. 7 is a cross-sectional view showing a cross-section of the light source unit according to Embodiment 5, corresponding to the cross-section taken along line III-III of FIG. FIG. 8 is a cross-sectional view showing a cross section of the light source unit according to Embodiment 6, corresponding to the cross section taken along line III-III in FIG. FIG. 9 is a cross-sectional view showing a cross-section of the light source unit according to Embodiment 7, corresponding to the cross-section taken along line III-III in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the embodiments described below are all comprehensive or specific examples. Numerical values, shapes, materials, constituent elements, arrangement positions of constituent elements, connection modes, and the like shown in the following embodiments are examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in independent claims representing the highest concept will be described as arbitrary constituent elements.

Each figure is a schematic diagram and is not necessarily strictly illustrated. Each drawing is a schematic drawing in which emphasis, omission, and ratio adjustment are performed as appropriate to illustrate the present invention, and may differ from the actual shape, positional relationship, and ratio. Moreover, in each figure, the same code|symbol is attached|subjected to substantially the same structure, and the overlapping description may be abbreviate|omitted or simplified.

Further, in the following embodiments, the Z-axis direction is, for example, the vertical direction, and the positive direction side of the Z-axis may be described as upward, and the negative direction side of the Z-axis may be described as downward. be. Also, the Y-axis direction and the X-axis direction are directions orthogonal to each other on a plane (horizontal plane) perpendicular to the Z-axis. Also, the Y-axis direction may be described as the horizontal direction.

In addition, in the following embodiments, for example, expressions indicating directions such as “horizontal direction” may be used. In this case, the "horizontal direction" means not only a completely horizontal direction but also an error of several percent that occurs during manufacturing or placement.

(Embodiment 1)
First, a light source unit according to Embodiment 1 will be described with reference to FIGS. 1 to 3. FIG.

The light source unit according to Embodiment 1 is arranged in a vehicle and irradiates light toward the road surface around the vehicle. The light source unit is used in vehicles such as automobiles and motorcycles, for example.

FIG. 1 is a front view showing a vehicle 200 equipped with a light source unit 100 according to Embodiment 1. FIG. FIG. 2 is a side view showing an enlarged side mirror 210 included in the vehicle according to the first embodiment.

Vehicle 200 is a vehicle that includes light source unit 100 . The vehicle 200 has the light source unit 100 on its outer surface (outer surface). Specifically, in the vehicle 200, the infrared light source 120 (see FIG. 3) provided in the light source unit 100 is positioned near the outer surface in the horizontal direction including the front-rear direction and the lateral direction with respect to the vehicle body. The light source unit 100 is installed at a position where the road surface around the vehicle 200 can be irradiated with the infrared light 300 when the infrared light 300 is irradiated. In the present embodiment, vehicle 200 includes light source unit 100 in side mirror 210 . More specifically, the light source unit 100 is arranged on the lower surface of the side mirror 210 . In the present embodiment, vehicle 200 is an automobile. In FIG. 1, the vehicle 200 includes the light source unit 100 only on the side mirror 210 on the positive side of the Y axis, but the side mirror on the negative side of the Y axis may also include the light source unit 100 . It should be noted that the term "outer surface" refers not only to the outer surface of the vehicle body of the vehicle 200 including horizontal outer surfaces such as the front, rear, left, and right, but also to the outer surface positioned laterally with respect to the vehicle body, for example, the side surface of the side mirror 210, the side surface, and the like. It also includes the lower surface of the mirror 210, the outer surface of the door provided in the vehicle 200, and the like. Further, the vehicle 200 having the light source unit 100 on the outer surface means not only the case where the light source unit 100 is arranged on the outer surface, but also the case where the light source unit 100 is arranged near the outer surface and inside the vehicle 200. include.

The light source unit 100 is arranged in the vehicle 200 and irradiates the road surface around the vehicle 200 with the infrared light 300 . The infrared light 300 emitted by the light source unit 100 is emitted for imaging the road surface around the vehicle 200 by, for example, a camera capable of imaging infrared light. The light source unit 100 includes a light source section 180 and an imaging section 190 .

FIG. 3 is a cross-sectional view showing a cross section of the light source unit 100 according to Embodiment 1, taken along line III-III in FIG.

The light source section 180 includes a housing 110 , an infrared light source 120 , a lens 130 , a substrate 140 , a second metal body 151 , and terminal sections 160 and 161 .

Housing 110 is a housing for housing infrared light source 120 . The housing 110 has, for example, a housing portion 111 and a lid portion 112 .

The housing portion 111 is a box for housing the infrared light source 120 . An opening is formed above the housing portion 111, and a lid portion 112 is arranged so as to close the opening.

The lid portion 112 is a lid body that closes an opening formed above the housing portion 111 . Housing 110 has attachment portion 113 for attachment to vehicle 200 . More specifically, the attachment portion 113 is formed on the lid portion 112 .

Attachment portion 113 is a connection portion for attaching light source portion 180 to vehicle 200 (more specifically, side mirror 210). The mounting portion 113 is formed with, for example, a screw hole for mounting a screw 220 . The light source unit 100 is attached to the vehicle 200 by screwing the screw 220 into the attachment portion 113 .

Although the material of the housing 110 is not particularly limited, for example, a resin material such as acrylic or polycarbonate, or a metal material is adopted. Note that the housing portion 111 and the lid portion 112 may be made of the same material, or may be made of different materials.

The infrared light source 120 is a light source that emits infrared light 300 . The infrared light source 120 has, for example, a solid semiconductor light source such as an LED (Light Emitting Diode). FIG. 3 schematically shows a state in which an LED that emits infrared light 300 mounted on a substrate 140 as the infrared light source 120 is sealed with resin or the like.

The lens 130 covers the infrared light source 120 and transmits the infrared light 300 emitted by the infrared light source 120 . Specifically, the lens 130 is an optical member arranged in the housing 110 so as to cover the infrared light source 120 below and for controlling the light distribution of the infrared light 300 emitted by the infrared light source 120 . Light exit surface 136 of lens 130 (the lower surface of lens 130 in the present embodiment) is arranged to be exposed from the outer surface of vehicle 200 , specifically, the lower surface of side mirror 210 . Further, the lens 130 is arranged apart from the infrared light source 120 .

The lens 130 is made of, for example, a translucent glass material or a transparent resin material such as acrylic or polycarbonate.

In the present embodiment, the shape of the light emitting side of the lens 130 is a convex shape that protrudes downward, but is not particularly limited, and may be, for example, a planar shape.

The substrate 140 is a substrate on which the infrared light source 120 is arranged. Specifically, the infrared light source 120 is mounted on the substrate 140 . Also, the substrate 140 is arranged in contact with the edge 131 of the lens 130 . Also, the substrate 140 is in contact with the housing 110 . In the present embodiment, substrate 140, housing 110 (specifically housing portion 111 included in the housing), and lens 130 are in direct contact with each other.

Although the material of the substrate 140 is not particularly limited, for example, a metal substrate, a ceramic substrate, a resin substrate, or the like is adopted. Note that the substrate 140 may be a flexible substrate or a rigid substrate.

Note that the edge 131 of the lens 130 and the substrate 140 may be in direct contact with each other, or may be in thermal contact with each other via a material (for example, a metal material) having higher thermal conductivity than the lens 130 and the substrate 140. may be

Further, the housing 110 (specifically, the housing portion 111) and the substrate 140 may be in direct contact, or may be made of a material having higher thermal conductivity than the housing 110 and the substrate 140 (for example, a metal material). may be in thermal contact via

The second metal body 151 is a heat dissipation member for dissipating heat generated by the infrared light source 120 . The second metal body 151 is arranged in contact with the rear surface 142 of the substrate 140 opposite to the mounting surface 141 on which the infrared light source 120 is mounted. For the second metal body 151, for example, aluminum metal, stainless steel, or the like having high thermal conductivity is adopted. Although the shape of second metal body 151 is not particularly limited, it is a plate in this embodiment.

Also, the second metal body 151 overlaps the edge 131 of the lens 130 when the substrate 140 is viewed from above. Specifically, in FIG. 3, the second metal body 151 is arranged via the substrate 140 above the edge 131 of the lens 130, that is, on the Z-axis positive direction side. The second metal body 151 preferably overlaps not only the edge 131 of the lens 130 but also the infrared light source 120 when viewed from above. Further, the second metal body 151 preferably overlaps the entire area overlapping with the lens 130 including the edge 131 of the lens 130 when viewed from above. Note that a plan view indicates a case where the mounting surface 141 of the substrate 140 is viewed from the normal direction of the mounting surface 141 .

The terminal portions 160 and 161 are terminals for supplying electric power supplied from an external power source or the like to the infrared light source 120 . The terminal portion 160 and the terminal portion 161 are electrically connected by metal wiring or the like (not shown).

The imaging unit 190 is an imaging device for imaging the road surface around the vehicle 200 . The image capturing unit 190 captures, for example, the road illuminated by the infrared light source 120 . As described above, the infrared light source 120 is an infrared light source that emits infrared light. Infrared light 300 reflected by the road surface is imaged.

Further, the imaging unit 190 is arranged closer to the vehicle 200 than the infrared light source 120 is. In the present embodiment, imaging unit 190 is arranged on the Y-axis negative direction side of infrared light source 120 and between infrared light source 120 (specifically, light source unit 180) and the vehicle body of vehicle 200. there is

The imaging unit 190 has an imaging device such as a CCD (Charge Coupled Device) image sensor, a CMOS (Complementary Metal Oxide Semiconductor) image sensor, or the like.

[Effects, etc.]
As described above, the light source unit 100 according to Embodiment 1 includes the substrate 140, the infrared light source 120 mounted on the substrate 140, the housing 110 that houses the infrared light source 120, and the infrared light source 120. and a lens 130 that transmits the infrared light 300 emitted by the infrared light source 120 . The lens 130 is in contact with the substrate 140 at the edge 131 of the lens 130 and is spaced apart from the infrared light source 120 .

As a result, the heat generated by the infrared light source 120 is easily dissipated from the lens 130 to the substrate 140 via the edge 131 of the lens 130 . Therefore, according to such a configuration, it is possible to suppress the heat generated by the infrared light source 120 from accumulating in the vicinity of the infrared light source 120, so that the heat dissipation of the light source unit 100 is improved.

Also, for example, the substrate 140 is in contact with the housing 110 .

As a result, the heat generated by the infrared light source 120 is easily dissipated from the substrate 140 to the housing 110 . Therefore, according to such a configuration, the heat dissipation of the light source unit 100 is further improved.

Further, for example, the second metal body 151 is further provided on the rear surface 142 of the substrate 140 opposite to the mounting surface 141 on which the infrared light source 120 is mounted. The second metal body 151 overlaps the edge 131 of the lens 130 when the substrate 140 is viewed from above.

This facilitates heat dissipation from the lens 130 to the second metal body 151 via the edge 131 of the lens 130 and the substrate 140 . Therefore, according to such a configuration, the heat generated by the infrared light source 120 can be further dissipated in the direction away from the infrared light source 120 by the second metal body 151, so that the heat dissipation property of the light source unit 100 is improved. be.

(Embodiment 2)
A light source unit according to Embodiment 2 will be described below with reference to FIG. In the description of the light source unit according to Embodiment 2, the differences from the light source unit 100 according to Embodiment 1 will be mainly described. , and the description may be partially omitted or simplified.

Further, in the following Embodiments 2 to 7, vehicles according to the present embodiment provided with light source units 100a, 100b, 100c, 100d, 100e, or 100f are all vehicles 200. FIG. Further, for example, the infrared light 300 shown in FIG. 1 is emitted from the infrared light source 120 included in the light source units 100a, 100b, 100c, 100d, 100e, or 100f.

FIG. 4 is a cross-sectional view showing light source unit 100a according to Embodiment 2, corresponding to the cross section taken along line III-III in FIG. That is, the cross section of the light source unit 100a shown in FIG. 4 corresponds to the line III-III in FIG.

The light source unit 100 a is arranged in the vehicle 200 and irradiates the road surface around the vehicle 200 with the infrared light 300 . The infrared light 300 emitted by the light source unit 100a is emitted for imaging the road surface around the vehicle 200 by a camera capable of imaging the infrared light 300, for example. The light source unit 100a includes a light source section 180a and an imaging section 190a.

The light source section 180 a includes a housing 110 , an infrared light source 120 , a lens 130 a, a substrate 140 , a second metal body 151 , terminal sections 160 and 161 and paint 171 .

The light source unit 100a is attached to the vehicle 200 so that the light exit surface 136a of the lens 130a is exposed from the outer surface of the vehicle 200. As shown in FIG. Specifically, the light exit surface 136 a of the lens 130 a is arranged so as to be exposed from the lower surface of the side mirror 210 .

Further, unlike the lens 130 according to the first embodiment, the lens 130a according to the second embodiment includes paint 171 on the light exit surface 136a side.

The paint 171 has optical transparency to transmit the infrared light 300 emitted by the infrared light source 120 and is the same color as the outer surface of the vehicle 200 . It should be noted that the paint 171 only needs to be able to transmit the infrared light 300, and the colorant such as pigment used is not particularly limited. Further, in the present embodiment, paint 171 has the same color as paint 170 applied to the outer surface of side mirror 210 provided in vehicle 200 . That is, the paint 171 makes the light exit surface 136 a of the lens 130 a the same color as the outer surface of the vehicle 200 .

Paint 170 is paint applied to the outer surface of vehicle 200 . The paint 170 may have the same color as the paint 170, and may not have a light transmittance that transmits infrared light. Here, "same color" means that they are similar colors, and the paint 170 and the paint 171 may have the same color system, such as red, blue, and green.

The imaging unit 190a has an imaging device such as a CCD (Charge Coupled Device) image sensor, a CMOS (Complementary Metal Oxide Semiconductor) image sensor, or the like. In Embodiment 2, the imaging unit 190a has paint 171 on the outer surface of the imaging unit 190, that is, the surface on which the infrared light 300 emitted from the infrared light source 120 and reflected on the road surface is incident.

Thus, vehicle 200 according to the present embodiment includes light source unit 100a, and light source unit 100a is attached to vehicle 200 so that light exit surface 136a of lens 130a is exposed from the outer surface of vehicle 200. . Also, the light exit surface 136 a of the lens 130 a has the same color as the outer surface of the vehicle 200 . In the present embodiment, paint 171 that transmits infrared light 300 is applied to light exit surface 136a, which is the outer surface of lens 130a. The applied paint 170 has the same color.

This makes it difficult to recognize the position of the light source unit 100a in the appearance of the vehicle 200. FIG. Therefore, it is possible to suppress deterioration of the appearance due to the vehicle 200 including the light source unit 100a.

In the present embodiment, paint 171 is applied to light exit surface 136a of lens 130a so that light exit surface 136a of lens 130a and the outer surface of vehicle 200 have the same color. Here, the lens 130 a itself may have the same color as the vehicle 200 . The lens 130a may be made of glass, resin, or the like to which the same colorant as that of the vehicle 200 is added, for example. This also allows the light exit surface 136a of the lens 130a and the outer surface of the vehicle 200 to have the same color.

Further, making the light emitting surface 136a of the lens 130a and the outer surface of the vehicle 200 the same color means that the light emitting surface 136a of the lens 130a should be the same color as the outer surface of the vehicle 200 located around the light emitting surface 136a. For example, when the light source unit 100a is arranged on the side mirror 210 and the side mirror 210 and the vehicle body of the vehicle 200 have different colors, the light exit surface 136a of the lens 130a may have the same color as the side mirror 210.

(Embodiment 3)
A light source unit according to Embodiment 3 will be described below with reference to FIG. In the description of the light source unit according to Embodiment 3, differences from the light source unit 100 according to Embodiment 1 will be mainly described. , and the description may be partly omitted or simplified.

FIG. 5 is a cross-sectional view showing a light source unit 100b according to Embodiment 3, corresponding to the cross section taken along line III-III in FIG. 5 corresponds to the line III-III in FIG.

The light source unit 100 b is arranged in the vehicle 200 and irradiates the road surface around the vehicle 200 with the infrared light 300 . The infrared light 300 emitted by the light source unit 100b is emitted for imaging the road surface around the vehicle 200 by a camera capable of imaging the infrared light 300, for example. The light source unit 100 b includes a light source section 180 b and an imaging section 190 .

The light source section 180 b includes a housing 110 , an infrared light source 120 , a lens 130 , a substrate 140 , a second metal body 151 , terminals 160 and 161 , and a first metal body 150 .

The first metal body 150 is a metal material arranged along the inner surface of the housing 110 . In this embodiment, the first metal body 150 is arranged in contact with the inner surface of the housing portion 111 of the housing 110 , that is, the entire surface on the infrared light source 120 side. Also, the substrate 140 is arranged in contact with the first metal body 150 . That is, the substrate 140 is arranged in thermal contact with the housing 110 , more specifically, with the housing portion 111 of the housing 110 via the first metal body 150 .

For the first metal body 150, for example, aluminum metal, stainless steel, or the like having high thermal conductivity is adopted.

In this manner, the light source unit 100 b includes the first metal body 150 arranged along the inner surface of the housing 110 in addition to the configuration of the light source unit 100 .

As a result, the heat generated by the infrared light source 120 is more easily radiated to the housing 110 by the first metal body 150 . Therefore, according to such a configuration, the heat dissipation of the light source unit 100b is further improved.

In this embodiment, first metal body 150 is also arranged between edge 131 of lens 130 and substrate 140 . The first metal body 150 may or may not be placed between the edge 131 of the lens 130 and the substrate 140 .

5, the side surface of the substrate 140 (the surface on the Y-axis side) is not in contact with the first metal body 150, but the side surface of the substrate 140 is in contact with the first metal body 150. good too.

(Embodiment 4)
A light source unit according to Embodiment 4 will be described below with reference to FIG. Note that the description of the light source unit according to Embodiment 4 focuses on the differences from the light source unit 100 according to Embodiment 1, and the same configurations as those of the light source unit 100 according to Embodiment 1 are the same. , and the description may be partly omitted or simplified.

FIG. 6 is a sectional view showing a light source unit 100c according to Embodiment 4, corresponding to the section taken along line III-III in FIG. That is, the cross section of the light source unit 100c shown in FIG. 6 corresponds to the line III-III in FIG.

The light source unit 100 c is arranged in the vehicle 200 and irradiates the road surface around the vehicle 200 with the infrared light 300 . The infrared light 300 emitted by the light source unit 100c is emitted for imaging the road surface around the vehicle 200 by a camera capable of imaging the infrared light 300, for example. The light source unit 100 c includes a light source section 180 c and an imaging section 190 .

The light source section 180 c includes a housing 110 , an infrared light source 120 , a lens 130 , a substrate 140 , a second metal body 151 , terminals 160 and 161 and a third metal body 152 .

The third metal body 152 is a metal material arranged on the mounting surface 141 of the substrate 140 on which the infrared light source 120 is mounted. In this embodiment, third metal body 152 is a reflector having light reflectivity that reflects infrared light 300 .

For the third metal body 152, for example, aluminum metal, stainless steel, or the like having high thermal conductivity is adopted.

The third metal body 152 is a plate whose surface on the infrared light source 120 side is curved so as to cover the infrared light source 120 . The third metal body 152 is erected on the mounting surface 141 of the substrate 140 . The third metal body 152 is arranged on the mounting surface 141 of the substrate 140 on the vehicle 200 side. Specifically, third metal body 152 is arranged between infrared light source 120 and vehicle 200 . Thereby, the third metal body 152 reflects the infrared light 300 irradiated toward the vehicle 200 by the infrared light source 120 in the direction opposite to the vehicle 200 .

In this manner, the light source unit 100c further includes the third metal body 152 on the mounting surface 141 of the substrate 140 on which the infrared light source 120 is mounted, in addition to the configuration of the light source unit 100. FIG.

Thereby, the heat generated by the infrared light source 120 is more easily radiated from the substrate 140 to the outside of the substrate 140 by the third metal body 152 . Therefore, according to such a configuration, the heat dissipation of the light source unit 100c is further improved.

Also, for example, the third metal body 152 has light reflectivity to reflect the infrared light 300 . That is, the third metal body 152 may be a reflector.

Thereby, the infrared light 300 emitted by the infrared light source 120 can be emitted in a desired direction by the third metal body 152 . For example, when the light source unit 100c is arranged in the vehicle 200 like the light source unit 100 shown in FIG. In this case, the vehicle 200 is partially irradiated with the infrared light 300 , and the infrared light 300 is lost due to the absorption of the infrared light 300 by the vehicle 200 . Therefore, for example, by arranging the third metal body 152 that reflects the infrared light 300 between the infrared light source 120 and the vehicle 200, the light source unit 100c prevents the vehicle 200 from absorbing the infrared light 300. It is possible to suppress the loss of the infrared light 300 due to the light source unit 100c and improve the heat dissipation of the light source unit 100c.

(Embodiment 5)
A light source unit according to Embodiment 5 will be described below with reference to FIG. In the description of the light source unit according to Embodiment 5, the differences from the light source unit 100 according to Embodiment 1 will be mainly described. , and the description may be partially omitted or simplified.

FIG. 7 is a cross-sectional view showing a light source unit 100d according to Embodiment 5, corresponding to the cross section taken along line III-III in FIG. That is, the cross section of the light source unit 100d shown in FIG. 7 corresponds to the line III-III in FIG.

The light source unit 100d is arranged in the vehicle 200 and irradiates the road surface around the vehicle 200 with light (infrared light 300). The infrared light 300 emitted by the light source unit 100 d is emitted for imaging the road surface around the vehicle 200 by a camera capable of imaging the infrared light 300 , for example. The light source unit 100 d includes a light source section 180 d and an imaging section 190 .

The light source section 180d includes a housing 110a, an infrared light source 120, a lens 130d, a substrate 140, a second metal body 151, and terminal sections 160 and 161.

The housing 110 a is a housing for housing the infrared light source 120 . The housing 110 has, for example, a housing portion 111a and a lid portion 112 .

The housing portion 111 a is a box-shaped body for housing the infrared light source 120 . An opening is formed above the housing portion 111, and a lid portion 112 is arranged so as to close the opening.

Moreover, the accommodating portion 111a is formed integrally with the lens 130d. That is, the lens 130d is integrated with the housing 110a. Therefore, the housing 110a is made of a material that transmits the infrared light 300. For example, a translucent glass material or a transparent resin material such as acrylic or polycarbonate is used.

Like the lens 130 , the lens 130 d covers the infrared light source 120 and transmits the infrared light 300 emitted by the infrared light source 120 . Specifically, the lens 130d is an optical member arranged in the housing 110a so as to cover the infrared light source 120 below and for controlling the light distribution of the infrared light 300 emitted by the infrared light source 120. In the present embodiment, a part of housing 110a located below infrared light source 120 is formed as lens 130d.

This eliminates the need for members, structures, etc. for connecting the lens 130d to the housing 110a and the substrate 140, so that the structure of the light source unit 100a can be simplified and reduced in size. Further, even if the lens 130d is colored (for example, black), the infrared light 300 emitted by the infrared light source 120 can be transmitted. It is possible to simplify the structure and reduce the size of the light source unit 100d without reducing the options of colors adopted for the body 110a.

(Embodiment 6)
A light source unit according to Embodiment 6 will be described below with reference to FIG. In the description of the light source unit according to Embodiment 6, the differences from the light source unit 100 according to Embodiment 1 will be mainly described. , and the description may be partly omitted or simplified.

FIG. 8 is a cross-sectional view showing a light source unit 100e according to Embodiment 6, corresponding to the cross section taken along line III-III in FIG. 8 corresponds to the line III-III in FIG.

The light source unit 100 e is arranged in the vehicle 200 and irradiates the road surface around the vehicle 200 with light (infrared light 300 ). The infrared light 300 emitted by the light source unit 100e is emitted for imaging the road surface around the vehicle 200 by a camera capable of imaging the infrared light 300, for example. The light source unit 100 e includes a light source section 180 e and an imaging section 190 .

The light source section 180 e includes a housing 110 , an infrared light source 120 , a lens 130 , a substrate 140 a, a second metal body 151 , and terminal sections 160 and 161 . That is, the light source unit 100e according to the sixth embodiment differs from the light source unit 100 according to the first embodiment in the substrate on which the infrared light source 120 is mounted.

The substrate 140a is a substrate on which the infrared light source 120 is arranged. Specifically, the infrared light source 120 is mounted on the substrate 140a. The substrate 140a has a metal film 153 .

The metal film 153 is a heat dissipation member arranged in layers on the mounting surface 141 on which the infrared light source 120 is mounted. Specifically, the metal film 153 is arranged in layers on the main surface of the plate-like base on which the infrared light source 120 is mounted. For the base, for example, a resin substrate, a ceramic substrate, or the like is used, and for the metal film 153, for example, a film made of a metal material such as aluminum metal or stainless steel with high thermal conductivity is used. Note that FIG. 8 shows the case where the metal film 153 is also arranged on the back surface 142 side of the substrate 140a. Of course, the metal film 153 may also be formed on the side surface of the base not shown in FIG. A flexible substrate or a rigid substrate may be employed for the base.

Also, the edge 131 of the lens 130 is in contact with the metal film 153 .

As a result, the heat generated by the infrared light source 120 is more easily radiated from the substrate 140 a to the outside of the substrate 140 a by the metal film 153 . In particular, when light source unit 100e is attached to vehicle 200 so that light emitting surface 136 of lens 130 is exposed from the outer surface of vehicle 200 as in the present embodiment, the heat remaining on substrate 140a is Since they are in contact with each other, the heat is easily dissipated to the lens 130, which easily dissipates the heat to the outside of the light source unit 100e. Therefore, according to such a configuration, the heat dissipation of the light source unit 100e is further improved.

Moreover, the housing 110 (specifically, the housing portion 111 of the housing 110 ) is in contact with the metal film 153 .

As a result, the heat generated by the infrared light source 120 is easily dissipated from the substrate 140 a to the housing 110 by the metal film 153 . Therefore, according to such a configuration, the heat dissipation of the light source unit 100e is further improved.

A part of the metal film 153 formed in a film shape on the surface of the substrate 140a is provided with an opening for exposing a part of the base for wiring of the infrared light source 120 and the like. good too.

(Embodiment 7)
A light source unit according to Embodiment 7 will be described below with reference to FIG. In the description of the light source unit according to Embodiment 7, the differences from the light source unit 100 according to Embodiment 1 will be mainly described. , and the description may be partially omitted or simplified.

FIG. 9 is a cross-sectional view showing a light source unit 100f according to Embodiment 7, corresponding to the cross section taken along line III-III in FIG. That is, the cross section of the light source unit 100f shown in FIG. 9 corresponds to the line III-III in FIG.

The light source unit 100f is arranged in the vehicle 200 and irradiates the road surface around the vehicle 200 with light (infrared light 300). The infrared light 300 emitted by the light source unit 100f is emitted for imaging the road surface around the vehicle 200 by a camera capable of imaging the infrared light 300, for example. The light source unit 100 f includes a light source section 180 f and an imaging section 190 .

The light source section 180 f includes a housing 110 , an infrared light source 120 , a lens 130 , a substrate 140 , a second metal body 151 , terminal sections 160 and 161 and a resin body 154 . That is, the light source unit 100f according to the seventh embodiment differs from the light source unit 100 according to the first embodiment in that the resin body 154 is provided.

The resin body 154 is a sealing member for sealing components inside the housing 110 , such as the second metal body 151 and the terminal portion 160 , housed in the housing 110 . Specifically, the resin body 154 is filled in the housing 110 . More specifically, the resin body 154 is filled in the housing portion 111 of the housing 110 . The resin body 154 is filled in the housing 110 by potting, for example. The material used for the resin body 154 is not particularly limited, but a material with high thermal conductivity is preferable. A material used for the resin body 154 is, for example, an elastomer.

As described above, in addition to the configuration of the light source unit 100, the light source unit 100f further includes the resin body 154 filled in the housing 110. As shown in FIG.

According to such a configuration, the heat generated by the infrared light source 120 is easily dissipated upward not only through the housing 110 but also through the resin body 154 . Therefore, heat is less likely to stay in the substrate 140, thereby further improving the heat radiation performance of the light source unit 100f.

(Other embodiments)
Although the light source unit and the vehicle according to each embodiment have been described above, the present invention is not limited to the above embodiment and modifications.

For example, in the above embodiment, an LED chip is used as a specific example of the infrared light source 120, but a semiconductor light emitting device such as a semiconductor laser, or a solid light emitting device such as an organic EL (Electro Luminescence) device or an inorganic EL device may be used. may be employed as the infrared light source 120 .

Further, for example, the infrared light source 120 may be implemented as an LED module having an SMD (Surface Mount Device) structure, or an LED module having a so-called COB (Chip On Board) structure in which an LED chip is directly mounted on a substrate. good.

In addition, forms obtained by applying various modifications to each embodiment that a person skilled in the art can think of, or realized by arbitrarily combining the constituent elements and functions of each embodiment without departing from the spirit of the present invention. Also included in the present invention.

100, 100a, 100b, 100c, 100d, 100e, 100f light source unit 110, 110a housing 120 infrared light source 130, 130a, 130d lens 131 edge 136, 136a light exit surface 140, 140a substrate 141 mounting surface 142 rear surface 150 1 metal body 151 second metal body 152 third metal body 153 metal film 154 resin body 200 vehicle 210 side mirror 300 infrared light

Claims (9)

a substrate;
an infrared light source mounted on the substrate;
a housing that houses the infrared light source;
a lens that covers the infrared light source and transmits infrared light emitted by the infrared light source;
the lens has an edge in contact with the substrate and is spaced apart from the infrared light source ;
The substrate includes a metal film arranged in layers on a mounting surface on which the infrared light source is mounted,
An edge of the lens is in contact with the metal film
light source unit. The light source unit according to Claim 1, wherein the substrate is in contact with the housing. The light source unit according to claim 1 or 2, wherein the lens is integrated with the housing. The light source unit according to any one of claims 1 to 3, further comprising a first metal body arranged along the inner surface of the housing. Furthermore, a second metal body is provided on the back surface of the substrate opposite to the mounting surface on which the infrared light source is mounted,
The light source unit according to any one of claims 1 to 4, wherein the second metal body overlaps an edge of the lens when the substrate is viewed from above. The light source unit according to any one of claims 1 to 5, further comprising a third metal body on a mounting surface of the substrate on which the infrared light source is mounted. The light source unit according to claim 6, wherein the third metal body has a light reflectivity of reflecting infrared light. The light source unit according to any one of claims 1 to 7 , wherein the housing is in contact with the metal film. a vehicle,
The light source unit according to any one of claims 1 to 8 , which is attached to the vehicle so that the light exit surface of the lens is exposed from the outer surface of the vehicle,
A light exit surface of the lens is the same color as an outer surface of the vehicle.

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