JP2020019303A - Light source unit and vehicle - Google Patents

Abstract

To provide a light source unit or the like which efficiently irradiates a road surface with light.SOLUTION: A light source unit 100 includes a housing 110, a light source 120 which is housed in the housing 110 and irradiates downward with light, and a lens 130 which covers a lower side of the light source 120 and is arranged on the housing 110. The lens 130 has a protrusion part 132 which is arranged on an inner surface positioned on a vehicle 200 side than an optical axis 310 of illumination light 300, which the light source 120 irradiates when the light source unit 100 is arranged on a vehicle 200, and protrudes to a light source 120 side. The protrusion part 132 includes a first surface where a normal direction faces the vehicle 200 side and a second surface where a normal direction faces the light source 120 side. An angle formed by the optical axis 310 and the first surface is larger than an angle formed by the optical axis 310 and the second surface.SELECTED DRAWING: Figure 4

Description

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

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

  For example, Patent Literature 1 discloses an illuminating device that is provided on a side mirror and illuminates the feet of a passenger outside a vehicle.

JP-A-2015-71386

  An illumination device (light source unit) that emits light toward a road surface, like a conventional illumination device, is required to be able to efficiently emit light to a road surface.

  The present invention provides a light source unit and the like that efficiently irradiates a road surface with light.

  A light source unit according to one embodiment of the present invention is a light source unit that irradiates light toward a road surface around a vehicle and is disposed on an outer surface of the vehicle. A light source that irradiates light toward, and a lens that covers a lower part of the light source and is disposed in the housing, wherein the lens is configured such that when the light source unit is disposed in the vehicle, the light source is An inner surface located closer to the vehicle than the optical axis of the irradiated light has a protrusion protruding toward the light source, the protrusion has a first surface whose normal direction faces the vehicle, and a normal direction. Includes a second surface facing the light source side, and an angle between the optical axis and the first surface is larger than an angle between the optical axis and the second surface.

  Further, a vehicle according to an aspect of the present invention includes the light source unit described above in a side mirror.

  According to the light source unit and the like of one embodiment of the present invention, light can be efficiently applied to a road surface.

FIG. 1 is a front view showing a vehicle including the light source unit according to the embodiment. FIG. 2 is an enlarged side view illustrating a side mirror included in the vehicle according to the embodiment. FIG. 3 is a cross-sectional view illustrating a cross section of the light source unit according to the embodiment, taken along line III-III in FIG. 2. FIG. 4 is an enlarged cross-sectional view illustrating a lens included in the light source unit according to the embodiment. FIG. 5 is an enlarged cross-sectional view illustrating a convex portion of a lens included in the light source unit according to the embodiment. FIG. 6 is a cross-sectional view illustrating Modification Example 1 of the lens included in the light source unit according to the embodiment. FIG. 7 is a cross-sectional view illustrating Modification Example 2 of the lens included in the light source unit according to the embodiment. FIG. 8 is a cross-sectional view illustrating a third modification of the lens included in the light source unit according to the embodiment. FIG. 9 is a cross-sectional view illustrating a light source unit according to a modification of the embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, constituent elements, arrangement positions of constituent elements, connection forms, and the like described in the following embodiments are merely examples, and do not limit the present invention. In addition, among the components in the following embodiments, components not described in the independent claims indicating the highest concept are described as arbitrary components.

  Each drawing is a schematic diagram, and is not necessarily strictly illustrated. Each of the drawings is a schematic diagram in which the present invention is appropriately emphasized, omitted, and adjusted in proportion to show the present invention, and may be different from the actual shape, positional relationship, and ratio. In each of the drawings, substantially the same components are denoted by the same reference numerals, and duplicate description may be omitted or simplified in some cases.

  In the following embodiments, the Z-axis direction is, for example, a vertical direction, and the negative side of the Z-axis may be described as downward. 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. Further, the Y-axis direction may be described as a horizontal direction.

  In the following embodiments, for example, an expression indicating a direction such as “horizontal direction” may be used. In this case, the “horizontal direction” means not only the case where the horizontal direction is completely set, but also includes an error of about several% that occurs at the time of manufacture or arrangement. Further, for example, “on the optical axis” means not only a location including the optical axis completely, but also a location near the optical axis, for example, a location about 1 mm to 5 mm away from the optical axis.

(Embodiment)
First, a light source unit according to an embodiment will be described with reference to FIGS.

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

  FIG. 1 is a front view showing a vehicle 200 including the light source unit 100 according to the embodiment. FIG. 2 is an enlarged side view showing a side mirror 210 provided in vehicle 200 according to the embodiment.

  The vehicle 200 is a vehicle including the light source unit 100. The vehicle 200 includes the light source unit 100 on an outer surface. Specifically, in the vehicle 200, a light source 120 (see FIG. 3) provided in the light source unit 100 is located at a position near the outer surface on the horizontal side including the front-rear direction and the side with respect to the vehicle body, and the light ( The light source unit 100 is installed at a position where the illumination light 300 can be emitted to a road surface around the vehicle 200 when the illumination light 300 is emitted. 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. Further, in FIG. 1, the vehicle 200 includes the light source unit 100 only on the side mirror 210 on the Y-axis positive direction side, but may also include the light source unit 100 on the side mirror on the Y-axis negative direction side. The outer surface refers not only to the outer surface of the vehicle body of the vehicle 200 including the outer surface in the horizontal direction such as front, rear, left and right, but also to the outer surface located on the side of the vehicle body, for example, the side surface of the side mirror 210, The lower surface of the mirror 210 or the outer surface of a door of the vehicle 200 is also included. Further, the vehicle 200 includes the light source unit 100 on the outer surface not only when the light source unit 100 is disposed on the outer surface, but also when the light source unit 100 is disposed near the outer surface and inside the vehicle 200. Including.

  The light source unit 100 is disposed on the vehicle 200 and emits the illumination light 300 toward a road surface around the vehicle 200. The illumination light 300 emitted by the light source unit 100 is, for example, infrared light, and is emitted to image a road surface around the vehicle 200 by a camera capable of imaging infrared light. The light source unit 100 includes a light source unit 180 and an imaging unit 190.

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

  The light source unit 180 includes a housing 110, a light source 120, a lens 130, a substrate 140, a radiator 150, and terminals 160 and 161.

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

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

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

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

  The material of the housing 110 is not particularly limited. For example, a resin material such as acrylic or polycarbonate, a metal material, or the like is used. Note that the housing 111 and the lid 112 may be formed of the same material, or may be formed of different materials.

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

  The lens 130 is an optical member that is disposed on the housing 110 so as to cover the lower part of the light source 120 and controls the light distribution of the illumination light 300 emitted by the light source 120.

  FIG. 4 is an enlarged sectional view showing a lens 130 included in the light source unit 100 according to the embodiment. FIG. 5 is an enlarged cross-sectional view illustrating a convex portion (first convex portion) 132 of the lens 130 included in the light source unit 100 according to the embodiment.

  The lens 130 has a light distribution control unit 131 for controlling the light distribution of the illumination light 300. The light distribution control unit 131 has one or more protrusions 132 formed to protrude toward the light source 120. In the present embodiment, the light distribution control unit 131 has a plurality of convex portions 132, and more specifically, has four convex portions 132. That is, the lens 130 has a plurality of convex portions 132.

  When the light source unit 100 is disposed on the vehicle 200, the protrusion 132 is located closer to the vehicle 200 than the optical axis 310 of the illumination light 300 emitted by the light source 120 (more specifically, to the vehicle body of the vehicle 200). It is formed on the inner surface of the lens 130. In the present embodiment, the lens 130 has a convex portion 132 formed on an inner surface located on the Y axis negative direction side with respect to the optical axis 310, that is, a surface on the light source 120 side. The projection 132 is formed so as to protrude toward the light source 120.

  The protrusion 132 has a first surface 133 whose normal direction faces the vehicle side, and a second surface 134 whose normal direction faces the light source 120 side. The illumination light 300 is emitted in a direction away from the vehicle 200, more specifically, in the Y-axis positive direction side by being totally reflected by the first surface 133. As described above, the lens 130 has, on one inner surface divided into two along the optical axis 310, a second surface 134 whose normal direction faces the light source 120 side and a first surface 134 whose normal direction faces the opposite side to the light source 120. A convex ridge 132 having a surface 133 is provided on the inner surface.

  In addition, each of the plurality of protrusions 132 is, for example, a protrusion that extends in the side surface of the vehicle 200, that is, the X-axis direction.

  The angle (first angle θ1) between the optical axis 310 and the first surface 133 is larger than the angle (second angle θ2) between the optical axis 310 and the second surface 134. Here, the angle between the first surface 133 or the second surface 134 and the optical axis 310 is, for example, the acute angle between the optical axis 310 and the extension of the plane of the first surface 133 or the second surface 134. Angle.

  Note that the plurality of convex portions 132 only need to have the first surface 133 and the second surface 134, and need not be formed in a convex stripe. Further, each of the plurality of protrusions 132 may not have a sharp tip, may have a rounded tip, or may have a flat surface at the tip. Further, each of the plurality of protrusions 132 may be formed on the lens 130 so as to extend in a substantially U-shape on the YZ plane with the optical axis 310 as a center.

  The lens 130 is formed of, for example, a transparent 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 protruding downward, but is not particularly limited, and may be, for example, a planar shape.

  Referring to FIG. 3 again, substrate 140 is a substrate on which light source 120 is arranged. Specifically, the light source 120 is mounted on the substrate 140. Further, the substrate 140 is arranged in contact with an end of the lens 130. 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 employed. Note that the substrate 140 may be a flexible substrate or a rigid substrate.

  The heat radiator 150 is a heat radiating member that is disposed on the surface of the substrate 140 opposite to the surface on which the light source 120 is disposed, and radiates heat generated by the light source 120. For the radiator 150, for example, aluminum metal, stainless steel, or the like having high thermal conductivity is used. The shape of the heat radiator 150 is not particularly limited, but is a plate in the present embodiment.

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

  The imaging unit 190 is an imaging device for capturing an image of a road surface around the vehicle 200. The imaging unit 190 captures, for example, a road surface illuminated by the light source 120. As described above, the light source 120 is an infrared light source that emits infrared light, and the imaging unit 190 emits the infrared light emitted from the light source 120, specifically, the infrared light emitted from the light source 120 and reflected on the road surface. Image infrared light.

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

  The imaging unit 190 includes, for example, an imaging element such as a charge coupled device (CCD) image sensor and a complementary metal oxide semiconductor (CMOS) image sensor.

[Effects]
As described above, the light source unit 100 according to the embodiment emits light toward a road surface around the vehicle 200 and is arranged on the outer surface of the vehicle 200. The light source unit 100 includes a housing 110, a light source 120 housed in the housing 110 and irradiating the illumination light 300 downward, and a lens 130 that covers the lower portion of the light source 120 and is disposed in the housing 110. Prepare. When the light source unit 100 is arranged in the vehicle 200, the lens 130 has a convex portion 132 protruding toward the light source 120 on an inner surface located closer to the vehicle 200 than the optical axis 310 of the illumination light 300 emitted by the light source 120. . The convex portion 132 includes a first surface 133 whose normal direction faces the vehicle 200 side, and a second surface 134 whose normal direction faces the light source 120 side. The first angle θ1 between the optical axis 310 and the first surface 133 is larger than the second angle θ2 between the optical axis 310 and the second surface 134.

  As a result, of the illumination light 300 emitted by the light source 120, the light traveling toward the vehicle 200 is totally reflected by the second surface 134, so that the light tends to travel in the direction opposite to the vehicle 200. In addition, this makes it difficult for the first surface 133 to be irradiated with the illumination light 300, so that, of the illumination light 300 emitted by the light source 120, light traveling toward the vehicle 200 is more likely to be totally reflected on the second surface 134. Become. The illumination light 300 applied to the light source unit 100 cannot be used because it is partially absorbed when colliding with the vehicle 200. Therefore, the light source unit 100 controls the illuminating light 300 to be emitted so as to be directed to the opposite side to the vehicle 200 by the projection 132. Thus, according to the light source unit 100, the amount of light that the illumination light 300 loses due to the vehicle 200 can be reduced, so that the road surface can be efficiently irradiated with the illumination light 300.

  Further, for example, the lens 130 has a plurality of convex portions 132.

  Accordingly, it is possible to increase the number of the second surfaces 134 that reflect the illumination light 300 toward the vehicle 200 and direct the illumination light 300 toward the opposite side to the vehicle 200. Therefore, according to the light source unit 100, it is possible to more efficiently irradiate the road surface with the illumination light 300.

  Further, for example, the light source 120 is an infrared light source, and the light source unit 100 further includes an imaging unit 190 that captures infrared light emitted from the light source 120. Further, for example, the imaging unit 190 is disposed closer to the vehicle 200 than the light source 120 is.

  Thus, for example, the light source 120 can be further distant from the vehicle 200 than when the light source 120 is disposed closer to the vehicle 200 than the imaging unit 190. Therefore, according to the light source unit 100, it is possible to more efficiently irradiate the road surface with the illumination light 300.

  Further, for example, the housing 110 has an attachment portion 113 for attachment to the vehicle 200.

  Thus, the light source unit 100 can be easily attached to the vehicle 200.

  Further, vehicle 200 according to the embodiment includes light source unit 100 in a side mirror.

  The side mirror 210 is often arranged to protrude laterally from the vehicle body of the vehicle 200. Therefore, by arranging the light source unit 100 on the side mirror 210, the light source unit 100 can be further distant from the vehicle body of the vehicle 200, so that the loss of the illumination light 300 by the vehicle 200 is suppressed and the road surface around the vehicle 200 is reduced. Can be irradiated with light.

[Modification of lens]
Hereinafter, modified examples of the lens included in the light source unit 100 will be described. The components other than the lens may be substantially the same as those of the light source unit 100 described above, and a description thereof will be omitted.

<Modification 1>
FIG. 6 is a cross-sectional view showing Modification Example 1 of the lens. The cross section of the lens 130a shown in FIG. 9 is a cross section corresponding to line III-III in FIG.

  The lens 130a has a second convex portion 132a formed on an inner surface of the lens 130 located on a side opposite to the vehicle 200 side with respect to the optical axis 310 of the illumination light 300 emitted from the light source 120. In the present embodiment, the lens 130a has a light distribution control unit 131a that controls the light distribution of the illumination light 300 emitted from the light source 120. The light distribution control unit 131a has a plurality of second convex portions 132a. That is, the lens 130a has a plurality of second convex portions 132a.

  Similarly to the convex portion 132, the second convex portion 132a distributes the illumination light 300 emitted by the light source 120 in a direction away from the vehicle 200, more specifically, in the positive Y-axis direction.

  The light exit surface 136 of the lens 130a has a convex shape protruding downward, and each of the tip portions 135 of the plurality of convex portions 132 is located on the same imaginary line 137 having the same curvature as the light exit surface 136. In the present embodiment, the tip 135 of the projection 132 and the tip of the second projection 132a are located on the virtual line 137.

  Thereby, the illumination light 300 emitted from the light source 120 is effectively refracted, that is, the illumination light 300 is distributed by the projection 132 toward the opposite side to the vehicle 200, and the illumination light 300 is lost by the vehicle 200. Since the amount of light can be reduced, the illumination light 300 can be more efficiently applied to the road surface.

  Each of the plurality of protrusions 132 and the plurality of second protrusions 132a does not have to have a sharp tip, may have a round tip, or has a flat surface at the tip. You may. Note that, for example, when a flat surface is provided at the tip, at least a part of the surface may be included on the virtual line 137.

  Further, each of the plurality of second convex portions 132a may be formed on the lens 130a so as to extend in a substantially U shape on the YZ plane with the optical axis 310 as a center.

<Modification 2>
FIG. 7 is a cross-sectional view illustrating Modification Example 2 of the lens. The cross section of the lens 130b shown in FIG. 7 is a cross section corresponding to line III-III in FIG.

  The lens 130b has a scattering unit 138 that scatters the illumination light 300 emitted from the light source 120 on the optical axis 310.

  The scattering unit 138 scatters the illumination light 300. The scattering portion 138 is, for example, a minute unevenness formed on the surface of the lens 130b by a graining process or the like. The scattering unit 138 may be formed on the lens 130b by printing a dot pattern on the surface of the lens 130b.

  For example, when a light source having a narrow angle light distribution is used as the light source 120, the illumination light 300 is more likely to be emitted directly under the light source 120, that is, on the optical axis 310 of the lens 130b than at other portions of the lens 130b. When an image is captured by the imaging unit 190 using the light source 120 in such a state, the amount of light is partially too large, so-called overexposure occurs, and a clear image is not generated by the imaging unit 190. Therefore, by providing the scattering portion 138 that scatters light on the optical axis 310 where the amount of light is particularly large in the lens 130b, it is possible to suppress the amount of light partially transmitted from the lens 130b from increasing. Accordingly, for example, even when an image is captured by the imaging unit 190 using the light source 120, the occurrence of overexposure can be suppressed.

  Note that the scattering portion 138 is not formed by processing the lens 130b, but may be a light diffusing material. For example, the scattering portion 138 may have light diffusing properties by containing a light diffusing material (fine particles) such as silica or calcium carbonate. Further, for example, the scattering portion 138 may be formed by forming a milky white light diffusion film on the surface (inner surface or outer surface) of the lens 130b. In addition, the scattering portion 138 may be formed by combining the above-described materials having light diffusing properties, shapes, and the like.

  FIG. 7 illustrates a case where the scattering portion 138 is provided on a surface of the first surface 133 and the second convex portion 132a of the convex portion 132 whose normal line faces the vehicle 200 side. This is because the illumination light 300 radiated to the first surface 133 is particularly suppressed from being radiated to the vehicle 200 side. Note that the scattering unit 138 may be formed on the second surface 134 instead of the first surface 133 of the projection 132, and may be formed on the inner surface of the lens 130b. Instead, it may be formed on the outer surface of the lens 130b.

<Modification 3>
FIG. 8 is a cross-sectional view showing Modification Example 3 of the lens. The cross section of the lens 130c illustrated in FIG. 8 is a cross section corresponding to line III-III in FIG.

  The lens 130c has a light blocking unit 139 that blocks light emitted from the light source 120 on the optical axis 310.

  The light blocking unit 139 blocks the illumination light 300 and suppresses emission of the lens 130c to the outside. The light-shielding portion 139 is formed, for example, by applying a resin containing a light absorbing agent that absorbs the illumination light 300 to the surface of the lens 130c.

  With such a configuration as well, similarly to the lens 130b, it is possible to suppress a partial increase in the amount of light transmitted through the lens 130c. Accordingly, for example, even when an image is captured by the imaging unit 190 using the light source 120, the occurrence of overexposure can be suppressed.

  FIG. 8 illustrates a case in which the light shielding portion 139 is provided on a surface of the first surface 133 and the second convex portion 132a of the convex portion 132 whose normal direction faces the vehicle 200 side. This is because the illumination light 300 radiated to the first surface 133 is particularly suppressed from being radiated to the vehicle 200 side. Note that the light-shielding portion 139 only needs to be able to suppress a partial increase in the amount of light. For example, the light-shielding portion 139 may be formed on the second surface 134 instead of the first surface 133 of the convex portion 132, Instead, it may be formed on the outer surface of the lens 130c.

(Modification of Embodiment)
Hereinafter, a light source unit according to a modification of the embodiment will be described with reference to FIG. In the description of the light source unit according to the modification of the embodiment, differences from the light source unit 100 according to the embodiment will be mainly described, and the same configuration as the light source unit 100 according to the embodiment will be the same. The description may be partially omitted or simplified in some cases.

  FIG. 9 is a cross-sectional view illustrating a light source unit 100a according to a modification of the embodiment. The cross section of the light source unit 100a shown in FIG. 9 is a cross section corresponding to line III-III in FIG.

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

  The light source section 180a includes a housing 110a, a light source 120, a lens 130d, a substrate 140, a radiator 150, and terminal sections 160 and 161.

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

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

  The housing 111a is formed integrally with the lens 130d. That is, the lens 130d is integral with the housing 110a. For this reason, a material that transmits the illumination light 300 is used for the housing 110a, and for example, a light-transmitting glass material or a transparent resin material such as acrylic or polycarbonate is used.

  The lens 130 d is an optical member that is disposed on the housing 110 a so as to cover a lower part of the light source 120 and controls the light distribution of the illumination light 300 emitted by the light source 120, similarly to the lens 130. In the present embodiment, a part of the housing 110a located below the light source 120 is formed as the lens 130d in the lens 130d.

  This eliminates the need for a member, structure, and the like 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 downsized. For example, when the illumination light 300 emitted from the light source 120 is infrared light, the illumination light 300 can be transmitted even when the lens 130b is colored (for example, black), so that the housing 110a and the lens 130d are integrated. By forming the light source unit 100a, the structure and the size of the light source unit 100a can be simplified and reduced in size without reducing the choice of colors used for the housing 110a.

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

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

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

  In addition, a form obtained by applying various modifications conceivable by those skilled in the art to each embodiment, or realized by arbitrarily combining components and functions in each embodiment without departing from the spirit of the present invention. Embodiments are also included in the present invention.

100, 100a Light source unit 110, 110a Housing 113 Mounting part 120 Light source 130, 130a, 130b, 130c, 130d Lens 132 Convex part (first convex part) 133 First surface 134 Second surface 135 Tip part 136 Light emitting surface 137 Virtual line 138 Scattering unit 139 Light shielding unit 190 Imaging unit 200 Vehicle 210 Side mirror 300 Illumination light 310 Optical axis

Claims (9)

A light source unit that irradiates light toward a road surface around a vehicle and is disposed on an outer surface of the vehicle,
A housing,
A light source that is housed in the housing and emits light downward.
A lens that covers the lower part of the light source and is disposed in the housing.
The lens, when the light source unit is disposed in the vehicle, on the inner surface located closer to the vehicle than the optical axis of the light emitted by the light source, has a convex portion protruding toward the light source,
The convex portion includes a first surface whose normal direction faces the vehicle side, and a second surface whose normal direction faces the light source side,
A light source unit, wherein an angle between the optical axis and the first surface is larger than an angle between the optical axis and the second surface. The light source unit according to claim 1, wherein the lens has a plurality of the convex portions. The light emitting surface of the lens has a convex shape protruding downward,
The light source unit according to claim 2, wherein each of the tip portions of the plurality of protrusions is located on the same imaginary line having the same curvature as the light exit surface. The light source unit according to claim 1, wherein the lens is integral with the housing. The light source is an infrared light source,
The light source unit further includes an imaging unit that captures infrared light emitted from the light source,
The light source unit according to any one of claims 1 to 4, wherein the imaging unit is disposed closer to the vehicle than the light source. The light source unit according to any one of claims 1 to 5, wherein the lens includes a scattering unit that scatters light emitted by the light source on the optical axis. The light source unit according to any one of claims 1 to 5, wherein the lens has a light-blocking portion that blocks at least a part of light emitted by the light source on the optical axis. The light source unit according to any one of claims 1 to 7, wherein the housing has a mounting portion for mounting to the vehicle. A vehicle comprising the light source unit according to claim 1 in a side mirror.

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