Light-emitting device and mobile body

Abstract

To provide a light-emitting body suppressing deterioration in image quality of an image imaged by an imaging device while suppressing enlargement of the light-emitting device even when a light emission part emitting invisible light such as IR light and a light emission part emitting visible light such as white light are incorporated into one light-emitting device.SOLUTION: A light-emitting device 1 is attached to a second support body supported by a first support body, and includes: a first light-emitting part 11a emitting invisible light detected by an imaging device 2 attached to the second support body; a second light-emitting part 11b emitting visible light; and a lens 20 through which the invisible light emitted from the first light-emitting part 11a and the visible light emitted from the second light-emitting part 11b transmits. An amount of light emitted from a part located on the side of the first support body in the lens 20 of the invisible light emitted from the first light-emitting part 11a is smaller than an amount of light emitted from a part located on the side opposite to the side of the first support body in the lens 20 of the invisible light emitted from the first light-emitting part 11a.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a light-emitting device and a moving object. [Background technology]

[0002] In order to monitor the area around the vehicle body using images, a technology has been proposed in which an imaging device is attached to the door mirror (side mirror) of the vehicle together with a light emitting device. In this case, the imaging device detects light emitted from the light emitting device and reflected by the road surface or obstacles, and generates an image, thereby making it possible to visualize and monitor the area around the vehicle.

[0003] In addition, a technology has been proposed in which lighting devices are attached to door mirrors to brightly illuminate the area around the vehicle door where passengers stand. In this case, when a passenger approaches the door, the lighting device installed on the door mirror is turned on to emit light, thereby brightly illuminating the area around the passengers' feet.

[0004] In this way, light-emitting devices may be attached to door mirrors for the purpose of surveillance, or for illumination (lighting). However, if a light-emitting device for surveillance and a light-emitting device for illumination are separately installed on a door mirror, problems may arise, such as an increase in the manufacturing cost of the door mirror and an increase in the size of the door mirror.

[0005] Therefore, a light emitting device that can achieve both the purpose of monitoring and the purpose of illumination has been proposed. For example, Patent Document 1 discloses that a light source for monitoring and a light source for illumination are combined into one light emitting device. Specifically, Patent Document 1 provides an IR light source that emits infrared light (IR light) as a light source for monitoring, and a white light source that emits white light as a light source for illumination. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2021-138349 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the light emitting device disclosed in Patent Document 1, the IR light source and the white light source are provided separately, and a lens that transmits the IR light emitted from the IR light source and a lens that transmits the white light emitted from the white light source are provided separately. Therefore, the technology disclosed in Patent Document 1 has a problem in that the light emitting device becomes large in size.

[0008] On the other hand, if part of the light emitted from the IR light source is reflected by the body of the car and this reflected light is detected by the imaging device, halation occurs in the image generated by the imaging device, which causes a decrease in image quality.

[0009] Thus, simply incorporating an IR light source and a white light source into one light emitting device, as in the light emitting device disclosed in Patent Document 1, does not result in a practical light emitting device.

[0010] The present invention has been made in consideration of such problems, and aims to provide a light-emitting device and a moving body that can prevent the light-emitting device from becoming larger and prevent the quality of images captured by an imaging device from deteriorating, even if a light-emitting unit that emits invisible light such as IR light and a light-emitting unit that emits visible light such as white light are incorporated into a single light-emitting device. [Means for solving the problem]

[0011] In order to achieve the above-mentioned object, one aspect of the light-emitting device of the present invention is a light-emitting device attached to a second support supported by a first support, and comprises a first light-emitting unit that emits invisible light that is detected by an imaging device attached to the second support, a second light-emitting unit that emits visible light, and a lens through which the invisible light emitted from the first light-emitting unit and the visible light emitted from the second light-emitting unit pass, wherein the amount of light emitted from the first light-emitting unit from a portion of the lens located on the first support side is less than the amount of light emitted from the first light-emitting unit from a portion of the lens located on the opposite side of the first support side.

[0012] Furthermore, one aspect of a moving object according to the present invention includes the above-described light emitting device, the imaging device, and the second support body, and the first support body is a vehicle body. [Effects of the Invention]

[0013] According to the present invention, even if a light-emitting section that emits invisible light such as IR light and a light-emitting section that emits visible light such as white light are incorporated into a single light-emitting device, it is possible to prevent the light-emitting device from becoming larger while also preventing a decrease in the image quality of images captured by an imaging device. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a front view of a moving body according to the first embodiment. [Figure 2] FIG. 2 is an enlarged side view of a door mirror provided in the moving body according to the first embodiment. [Figure 3] FIG. 3 is a cross-sectional view showing the configuration of the light emitting device according to the first embodiment. [Figure 4] FIG. 4 is a diagram showing part of the ray trajectories of near-infrared light and white light emitted from the light emitting device according to the first embodiment. [Figure 5] FIG. 5 is a diagram showing a configuration of a light emitting device according to the second embodiment. [Figure 6] FIG. 6 is a diagram showing a configuration of a light emitting device according to the third embodiment. [Figure 7] FIG. 7 is a diagram showing a configuration of a light emitting device according to a modification of the third embodiment. [Figure 8] FIG. 8 is a diagram showing the configuration of a light emitting device according to the fourth embodiment. [Figure 9] FIG. 9 is a diagram showing the configuration of a light emitting device according to the first modification. [Figure 10] FIG. 10 is a diagram showing the configuration of a light emitting device according to the second modification. [Figure 11] FIG. 11 is a diagram showing the configuration of a light emitting device according to the third modification. [Figure 12] FIG. 12 is a diagram showing the configuration of a light emitting device according to the fourth modification. [Figure 13] FIG. 13 is a diagram showing the configuration of a light emitting device according to the fifth modification. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that each of the embodiments described below represents a specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, components that are not described in the independent claims that represent the highest concept of the present invention will be described as optional components.

[0016] Note that each figure is a schematic diagram and is not necessarily an exact illustration. Therefore, the scales and the like do not necessarily match in each figure. In each figure, the same reference numerals are used for substantially the same components, and duplicate explanations will be omitted or simplified.

[0017] In the present specification and drawings, the X-axis, Y-axis, and Z-axis represent the three axes of a three-dimensional Cartesian coordinate system. The X-axis and Y-axis are perpendicular to each other and perpendicular to the Z-axis. In the following embodiments, the Z-axis direction is the vertical direction, with the positive side of the Z-axis being upward and the negative side of the Z-axis being downward. The Y-axis direction is to the side of the moving body (automobile), and the X-axis direction is the front-to-rear direction of the moving body (automobile). The positive X-axis direction is the direction in which the moving body travels (forward), and the negative X-axis direction is the direction opposite to the direction in which the moving body travels (backward).

[0018] (Embodiment 1) First, a moving body 100 according to the first embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a front view of the moving body 100 according to the first embodiment. Fig. 2 is an enlarged side view of a door mirror 120 provided in the moving body 100 according to the first embodiment.

[0019] The mobile object 100 may, for example, have a vehicle. As shown in FIGS. 1 and 2, the mobile object 100 according to this embodiment is an automobile. Specifically, the mobile object 100 is a four-wheeled automobile. The mobile object 100, which is an automobile, may be, for example, a gasoline-powered automobile driven by a gasoline engine, an electric automobile driven by electricity, or a hybrid automobile. Note that the mobile object 100 may also be another type of automobile, such as a two-wheeled automobile (motorcycle).

[0020] The moving body 100 includes a vehicle body 110, a door mirror 120, a light emitting device 1, and an imaging device 2.

[0021] The vehicle body 110 is the main body of the vehicle 100 and has a cabin in which the driver rides. Note that passengers other than the driver may also ride in the cabin of the vehicle body 110. The vehicle body 110 is a first support that supports the door mirrors 120.

[0022] The door mirrors 120 are side mirrors provided on the sides of the vehicle body 110. The door mirrors 120 are supported by the vehicle body 110. Specifically, as shown in FIG. 2, the door mirrors 120 are supported by the front doors 111 of the vehicle body 110. The door mirrors 120 are provided on each of the two front doors 111.

[0023] Door mirror 120 has a mirror cover 121 and a mirror fitted in an opening of mirror cover 121. Mirror cover 121 is made of resin or metal, and blocks light by absorbing or reflecting it.

[0024] The door mirror 120 is a second support that supports the light emitting device 1. In this embodiment, the door mirror 120 also supports the imaging device 2. That is, the light emitting device 1 and the imaging device 2 are supported on the door mirror 120. Note that in this embodiment, the light emitting device 1 and the imaging device 2 are supported on each of the two door mirrors 120, but this is not limited to this. That is, the light emitting device 1 and the imaging device 2 may be supported on only one of the two door mirrors 120.

[0025] 1, the light emitting device 1 and the imaging device 2 are located on the side of a vehicle body 110 and attached to a door mirror 120. Specifically, the light emitting device 1 and the imaging device 2 are attached to the lower part of the door mirror 120. More specifically, the light emitting device 1 and the imaging device 2 are attached to the lower part of a mirror cover 121 of the door mirror 120.

[0026] Furthermore, the light emitting device 1 and the imaging device 2 are attached to the door mirror 120, lined up in the Y-axis direction. In this embodiment, the light emitting device 1 is arranged closer to the vehicle body 110 than the imaging device 2. In other words, the imaging device 2 is arranged outside the light emitting device 1. That is, the vehicle body 110, the light emitting device 1, and the imaging device 2 are arranged in this order. Note that the arrangement order of the light emitting device 1 and the imaging device 2 is not limited to this. Specifically, the imaging device 2 may be arranged closer to the vehicle body 110 than the light emitting device 1. That is, the vehicle body 110, the imaging device 2, and the light emitting device 1 may be arranged in this order.

[0027] 1, a light-emitting device 1 attached to the lower part of a door mirror 120 emits light downward. In this embodiment, the light-emitting device 1 emits near-infrared light and white light toward the road surface. The light-emitting device 1 may emit near-infrared light and white light simultaneously, or may emit near-infrared light and white light at different times.

[0028] Next, the configuration of the light emitting device 1 according to embodiment 1 will be described with reference to Fig. 3. Fig. 3 is a cross-sectional view showing the configuration of the light emitting device 1 according to embodiment 1. Fig. 3 shows the light emitting device 1 and the surrounding structure of the light emitting device 1 when cut along the cross section III-III line in Fig. 2.

[0029] The light-emitting device 1 includes a first light-emitting section 11a that emits invisible light, a second light-emitting section 11b that emits visible light, a lens 20 that transmits the invisible light emitted from the first light-emitting section 11a and the visible light emitted from the second light-emitting section 11b, and a shade 30 that blocks light.

[0030] In this embodiment, the first light-emitting section 11a and the second light-emitting section 11b are configured by separate light sources. Specifically, the light-emitting device 1 includes a first light source 10a including the first light-emitting section 11a and a second light source 10b including the second light-emitting section 11b.

[0031] The first light source 10a and the second light source 10b are LED light sources configured by LEDs (Light Emitting Diodes). In this embodiment, the first light source 10a and the second light source 10b are individually packaged surface mount device (SMD) type LED light sources.

[0032] Specifically, the first light source 10a has a first light-emitting unit 11a and a first container 12a that holds the first light-emitting unit 11a. The second light source 10b has a second light-emitting unit 11b and a second container 12b that holds the second light-emitting unit 11b. The first container 12a and the second container 12b are, for example, white resin or ceramic packages with recesses.

[0033] The first light-emitting unit 11a is housed in a recess in the first container 12a. The first light-emitting unit 11a has one or more LED chips that are primarily mounted on the bottom of the recess in the first container 12a, and a sealing member that fills the recess in the first container 12a and seals the LED chips. The sealing member is made of a light-transmitting material such as silicone resin.

[0034] The second light-emitting unit 11b is housed in a recess in the second container 12b. Similar to the first light-emitting unit 11a, the second light-emitting unit 11b has one or more LED chips primarily mounted on the bottom of the recess in the second container 12b, and a sealing member that fills the recess in the second container 12b and seals the LED chips. The sealing member is made of a light-transmitting material such as silicone resin.

[0035] The first light emitter 11a in the first light source 10a emits invisible light. The wavelength of the light emitted by the first light emitter 11a is longer than the wavelength of the light emitted by the second light emitter 11b. In this embodiment, the first light emitter 11a emits infrared light (IR light) as invisible light. That is, the first light emitter 11a is an IR light source. Specifically, the first light emitter 11a emits near-infrared light (NIR light). The near-infrared light emitted by the first light emitter 11a is, for example, light with a wavelength of about 700 nm to 2500 nm.

[0036] The first light-emitting section 11a may be composed of, for example, an LED chip that emits near-infrared light and a transparent sealing member, or may be composed of an LED chip that emits short-wavelength light (such as blue light or ultraviolet light) and a sealing member containing a wavelength conversion material (such as a phosphor) that converts the wavelength of this short-wavelength light and emits near-infrared light.

[0037] The near-infrared light emitted from the first light-emitting unit 11a is irradiated from the light-emitting device 1 to capture an image of the area surrounding the vehicle body 110 of the moving body 100, and is detected by the imaging device 2. Specifically, the near-infrared light emitted from the first light-emitting unit 11a is irradiated from the light-emitting device 1 to capture an image of the road surface and obstacles around the moving body 100.

[0038] The second light emitter 11b in the second light source 10b emits visible light. In this embodiment, the second light emitter 11b emits white light as visible light. In other words, the second light source 10b is a white light source. As an example, the second light emitter 11b emits white light with a color temperature of 3000K to 7000K.

[0039] The second light-emitting unit 11b is composed of, for example, an LED chip that emits blue light and a sealing member containing a yellow phosphor. In the second light-emitting unit 11b configured in this manner, the yellow phosphor is excited by a portion of the blue light emitted by the LED chip, causing the yellow phosphor to emit yellow fluorescence. This yellow light mixes with the blue light not absorbed by the yellow phosphor to become white light, which is then emitted from the second light-emitting unit 11b. The sealing member is not limited to the yellow phosphor, and may also contain a red phosphor and a green phosphor.

[0040] The white light emitted from the second light-emitting unit 11b is irradiated from the light-emitting device 1 to brighten the area around the vehicle body 110 of the moving object 100. Specifically, the white light emitted from the second light-emitting unit 11b is irradiated from the light-emitting device 1 to brightly illuminate the road surface around the moving object 100, in particular the road surface below the door mirror 120.

[0041] The first light source 10a and the second light source 10b are disposed on a substrate 40. The substrate 40 is a mounting substrate on which the first light source 10a and the second light source 10b are mounted. The substrate 40 is, for example, a printed wiring board on which metal wiring is formed in a predetermined pattern. As the base substrate of the substrate 40, for example, a resin substrate, a ceramic substrate, or an insulating coated metal substrate can be used. Note that the substrate 40 is a rigid substrate, but may also be a flexible substrate.

[0042] The first light source 10a and the second light source 10b are arranged adjacent to each other in the Y-axis direction on the substrate 40. In the present embodiment, the second light source 10b is arranged closer to the vehicle body 110 than the first light source 10a.

[0043] The first light-emitting unit 11a and the second light-emitting unit 11b emit light using power supplied from a power supply circuit. The power supply circuit can cause the first light-emitting unit 11a and the second light-emitting unit 11b to emit light independently. Therefore, the power supply circuit can individually control the lighting state of the first light-emitting unit 11a and the lighting state of the second light-emitting unit 11b. For example, the power supply circuit can cause the first light-emitting unit 11a and the second light-emitting unit 11b to emit light at different times or simultaneously. The power supply circuit converts AC power from an external power source into DC power of a predetermined level by rectifying, smoothing, stepping down, etc., and supplies the DC power to the first light-emitting unit 11a and the second light-emitting unit 11b.

[0044] The lens 20 is an optical member that transmits the invisible light emitted from the first light-emitting unit 11a and the visible light emitted from the second light-emitting unit 11b. In other words, the lens 20 is a single lens that is common to the invisible light emitted from the first light-emitting unit 11a and the visible light emitted from the second light-emitting unit 11b. Therefore, the invisible light emitted from the first light-emitting unit 11a and the visible light emitted from the second light-emitting unit 11b are incident on the lens 20. In this embodiment, the near-infrared light emitted from the first light-emitting unit 11a and the white light emitted from the second light-emitting unit 11b are transmitted through the lens 20.

[0045] In this embodiment, the optical axis (center axis) of lens 20 coincides with the optical axis of first light-emitting part 11a, but is not limited to this. Note that the optical axis of second light-emitting part 11b is located closer to vehicle body 110 than the optical axis of lens 20.

[0046] The lens 20 has a light distribution control unit 21 that controls the light distribution of the incident light. The light distribution control unit 21 controls the light distribution of the near-infrared light emitted from the first light-emitting unit 11a and also controls the light distribution of the white light emitted from the second light-emitting unit 11b. For example, the light distribution control unit 21 increases the light distribution angle of the incident light. The near-infrared light emitted from the first light-emitting unit 11a and the white light emitted from the second light-emitting unit 11b pass through the light distribution control unit 21 and are projected toward the road surface.

[0047] The lens 20 covers the first light source 10a and the second light source 10b. Specifically, the light distribution control unit 21 covers the first light source 10a and the second light source 10b from below. The inner surface of the light distribution control unit 21 is an incident surface onto which the near-infrared light emitted from the first light-emitting unit 11a and the white light emitted from the second light-emitting unit 11b are incident, and faces the first light source 10a and the second light source 10b. The outer surface of the light distribution control unit 21 is an exit surface from which the light incident on the light distribution control unit 21 exits. In this embodiment, the light distribution control unit 21 is the outermost part of the light-emitting device 1. Therefore, the outer surface (exit surface) of the light distribution control unit 21 is an exposed surface.

[0048] In the present embodiment, lens 20 has light-guiding section 22 that guides invisible light (specifically, white light) emitted from second light-emitting section 11b. Light-guiding section 22 is provided at a position overlapping second light-emitting section 11b when viewed from the optical axis direction (Z-axis direction) of second light-emitting section 11b. Light-guiding section 22 is also connected to light distribution control section 21. Specifically, light-guiding section 22 is a light-guiding pole extending in the Z-axis direction, with an end face of one longitudinal end of light-guiding section 22 facing the light-emitting surface of second light-emitting section 11b and the other longitudinal end of light-guiding section 22 connected to light distribution control section 21.

[0049] As a result, most of the white light emitted from second light-emitting unit 11b enters light-guiding unit 22. In the present embodiment, the white light emitted from second light-emitting unit 11b directly enters light-guiding unit 22. The white light that has entered light-guiding unit 22 is guided inside light-guiding unit 22 while being totally reflected by the side surfaces of light-guiding unit 22, passes through light distribution control unit 21, and is emitted to the outside of lens 20.

[0050] On the other hand, the near-infrared light emitted from the first light-emitting unit 11a enters the lens 20 via the primary lens 50. That is, the near-infrared light emitted from the first light-emitting unit 11a first enters the primary lens 50. The primary lens 50 is a diffusion lens that increases the light distribution angle of the incident light. In this embodiment, the primary lens 50 is a half-dome shaped optical member.

[0051] The lens 20 further has a cylindrical portion 23 that surrounds the first light source 10a, the second light source 10b, and the substrate 40. The first light source 10a, the second light source 10b, and the substrate 40 are housed in the cylindrical portion 23 of the lens 20. The lens 20 is generally bowl-shaped with a central portion that protrudes downward and an open top.

[0052] The lens 20 is made of a material that transmits visible light. Specifically, the lens 20 is made of a material that has a high transmittance for visible light. For example, the lens 20 is made of a transparent resin material or a transparent glass material that is transparent to visible light. Examples of the transparent resin material that can be used include polycarbonate resin, silicone resin, and acrylic resin. In this embodiment, the entire lens 20 is made of a material that transmits visible light. In other words, the light distribution control section 21, the light guide section 22, and the cylindrical section 23 are integrally made of the same light-transmitting material.

[0053] A buffer material 130 is provided between the door mirror 120 and the lens 20. Specifically, the buffer material 130 is inserted between the mirror cover 121 of the door mirror 120 and the light distribution control unit 21 of the lens 20. The buffer material 130 is an elastic member such as sponge. The buffer material 130 is made of a material that absorbs white light and near-infrared light.

[0054] The shade 30 blocks light that is directed toward the vehicle body 110 (first support) out of the near-infrared light emitted from the first light-emitting unit 11a. The shade 30 covers a portion of the lens 20. Specifically, the shade 30 covers a portion of the light distribution control unit 21 of the lens 20 that faces the vehicle body 110. The shade 30 also covers half of the first light-emitting unit 11a that faces the vehicle body 110. By providing such a shade 30, it is possible to prevent the near-infrared light from traveling toward the vehicle body 110. The shade 30 is made of, for example, a white resin material. As a result, the light that is directed toward the vehicle body 110 out of the near-infrared light emitted from the first light-emitting unit 11a is reflected by the shade 30 and is blocked. The shade 30 may be made of a material that absorbs near-infrared light. As a result, the light emitted from the first light-emitting part 11a and directed toward the vehicle body 110 is absorbed by the shade 30 and is thereby blocked.

[0055] Furthermore, the shade 30 is provided with a through-hole 31 that penetrates the light-guiding section 22 of the lens 20. Therefore, although the shade 30 covers the second light-emitting section 11b, most of the visible light emitted from the second light-emitting section 11b is not blocked by the shade 30 and enters the light-guiding section 22. The shade 30 may be made of a resin material that transmits visible light and absorbs infrared light. As a result, even when the white light emitted from the second light-emitting section 11b reaches the shade 30, it passes through the shade 30 and is not blocked by the shade 30.

[0056] The imaging device 2 is a camera that detects invisible light emitted from the first light-emitting unit 11a of the light-emitting device 1. Specifically, the imaging device 2 detects light that is emitted from the first light-emitting unit 11a and reflected by the road surface or obstacles. The imaging device 2 generates an image of the area surrounding the moving object 100 by detecting the light that is reflected by the road surface or obstacles around the moving object 100.

[0057] In this embodiment, the invisible light of the first light-emitting unit 11a detected by the imaging device 2 is near-infrared light, and therefore the imaging device 2 is a near-infrared camera capable of detecting near-infrared light. The imaging device 2 has an imaging element such as a CMOS (Complementary Metal Oxide Semiconductor) image sensor or a CCD (Charge Coupled Device) image sensor.

[0058] The lens surface (exposed surface) of the imaging device 2 is preferably located above the lens surface (exposed surface) of the light emitting device 1. This prevents the invisible light emitted from the first light emitting part 11a from being directly incident on the imaging device 2 without being reflected by the road surface or the like.

[0059] Next, the optical action of the light emitting device 1 according to the first embodiment will be described with reference to Fig. 4. Fig. 4 is a diagram showing part of the ray trajectories of near-infrared light and white light emitted from the light emitting device 1. In Fig. 4, the ray trajectory of the near-infrared light emitted from the first light emitting section 11a is shown by a solid line, and the ray trajectory of the white light emitted from the second light emitting section 11b is shown by a dashed line.

[0060] First, the ray trajectory of the near-infrared light emitted from the first light-emitting unit 11a will be described. As shown by the solid line in Fig. 4, the near-infrared light emitted from the first light-emitting unit 11a passes through the primary lens 50 and then enters the lens 20.

[0061] At this time, part of the near-infrared light emitted from first light-emitting unit 11a and directed away from vehicle body 110 passes through primary lens 50 and then enters light distribution control unit 21. The near-infrared light that has entered light distribution control unit 21 is refracted by light distribution control unit 21 as it passes through light distribution control unit 21, and is irradiated onto the road surface toward the opposite side from vehicle body 110.

[0062] On the other hand, part of the near-infrared light emitted from first light-emitting unit 11a toward the vehicle body 110 passes through primary lens 50 and then enters light-guiding unit 22 from the side surface of light-guiding unit 22 of lens 20. Specifically, the near-infrared light emitted from first light-emitting unit 11a enters light-guiding unit 22 from the side surface 22b of light-guiding unit 22 opposite to the vehicle body 110 side. At this time, in the ZY cross section shown in FIG. 4, the inclination of side surface 22a of light-guiding unit 22 facing the vehicle body 110 is gentler than the inclination of side surface 22b of light-guiding unit 22 opposite to the vehicle body 110 side. As a result, the near-infrared light that reaches light-guiding unit 22 is likely to enter light-guiding unit 22 from the side surface 22b of light-guiding unit 22 into light-guiding unit 22 without being totally reflected by the side surface 22b of light-guiding unit 22. Most of the near-infrared light incident from the side surface 22b of the light guiding unit 22 is refracted by the light guiding unit 22 and does not reach the outer surface of the light distribution control unit 21, but is absorbed or reflected and blocked by the mirror cover 121 of the door mirror 120 or the buffer material 130. Note that part of the near-infrared light incident from the side surface of the light guiding unit 22 passes through the light distribution control unit 21 and heads toward the vehicle body 110.

[0063] Furthermore, part of the near-infrared light emitted from the first light-emitting part 11a and directed toward the vehicle body 110 is blocked by the shade 30 after passing through the primary lens 50.

[0064] Among the near-infrared light emitted from the first light-emitting unit 11a, some light that is directed toward the vehicle body 110 does not enter the light-guiding unit 22 and is not blocked by the shade 30. This light passes through the light distribution control unit 21 and is directed toward the vehicle body 110.

[0065] In this way, the near-infrared light emitted from the first light-emitting unit 11a has its light distribution angle widened by the primary lens 50 and the lens 20 and is irradiated onto a wide area of ​​the road surface, but the component of the light directed toward the vehicle body 110 is attenuated or blocked, so that the amount of the near-infrared light emitted from the first light-emitting unit 11a and emitted from the portion of the lens 20 located on the vehicle body 110 side is less than the amount of the near-infrared light emitted from the first light-emitting unit 11a and emitted from the portion of the lens 20 located on the opposite side from the vehicle body 110 side. For example, the near-infrared light emitted from the first light-emitting unit 11a is irradiated onto a wide area of ​​the road surface in the fore-and-aft direction of the vehicle body 110 in the lateral areas of the vehicle body 110, but is prevented from traveling toward the vehicle body 110.

[0066] The near-infrared light emitted from the first light-emitting unit 11a and reflected by the road surface or obstacles is detected by the imaging device 2 to generate an image, thereby making it possible to visualize and monitor the area around the vehicle.

[0067] Next, the ray trajectory of the white light emitted from second light-emitting unit 11b will be described. As indicated by the dashed line in Fig. 4, the white light emitted from second light-emitting unit 11b enters lens 20. Specifically, the white light emitted from second light-emitting unit 11b enters light-guiding unit 22 from the end face of light-guiding unit 22 of lens 20. The white light that enters light-guiding unit 22 is guided within light-guiding unit 22 while repeatedly undergoing total reflection on the side surfaces of light-guiding unit 22, and then passes through light distribution control unit 21 to be irradiated toward the road surface.

[0068] 4, the inclination of side surface 22a of light guiding unit 22 facing vehicle body 110 is gentler than the inclination of side surface 22b of light guiding unit 22 on the opposite side to vehicle body 110. This makes it easier for the white light incident on light guiding unit 22 to be totally reflected by side surface 22a of light guiding unit 22 facing vehicle body 110.

[0069] Therefore, the white light emitted from the second light-emitting unit 11b is guided through the light-guiding unit 22, whereby the light distribution angle is narrowed to form spot light, which is then irradiated onto the road surface below the door mirror 120. In other words, the white light can be spot-illuminated below the door mirror 120. This allows the white light to brightly illuminate the feet of occupants when they get into or out of the vehicle.

[0070] As described above, in the light-emitting device 1 of the present embodiment, the near-infrared light emitted from the first light-emitting unit 11a is irradiated over a wide area, while the white light emitted from the second light-emitting unit 11b is irradiated over a narrow area directly below. In other words, the light distribution angle of the white light emitted from the lens 20 is smaller than the light distribution angle of the near-infrared light emitted from the lens 20. In other words, the light distribution angle of the near-infrared light emitted from the lens 20 is larger than the light distribution angle of the white light emitted from the lens 20.

[0071] As described above, the light-emitting device 1 according to this embodiment includes a first light-emitting unit 11a that emits near-infrared light as invisible light, a second light-emitting unit 11b that emits white light as visible light, and a lens 20 through which the near-infrared light emitted from the first light-emitting unit 11a and the white light emitted from the second light-emitting unit 11b pass, and the amount of near-infrared light emitted from the first light-emitting unit 11a that is emitted from a portion of the lens 20 that is located on the vehicle body 110 is less than the amount of near-infrared light emitted from the first light-emitting unit 11a that is emitted from a portion of the lens 20 that is located on the opposite side of the vehicle body 110.

[0072] As described above, in the light emitting device 1 according to the present embodiment, the first light emitting unit 11a that emits near-infrared light and the second light emitting unit 11b that emits white light are incorporated into one light emitting device 1, and the near-infrared light emitted from the first light emitting unit 11a and the white light emitted from the second light emitting unit 11b are incident on one common lens 20. This makes it possible to prevent the light emitting device 1 from becoming larger in size even if the first light emitting unit 11a and the second light emitting unit 11b are incorporated into one light emitting device 1.

[0073] Moreover, in the light emitting device 1 according to the present embodiment, the amount of near-infrared light emitted from the first light-emitting unit 11a and emitted from a portion of the lens 20 located on the vehicle body 110 is smaller than the amount of near-infrared light emitted from the first light-emitting unit 11a and emitted from a portion of the lens 20 located on the opposite side from the vehicle body 110. This prevents the near-infrared light emitted from the first light-emitting unit 11a from traveling toward the vehicle body 110, thereby preventing a portion of the near-infrared light emitted from the first light-emitting unit 11a from being reflected by the vehicle body 110 of the moving object 100 and the reflected light from being detected by the imaging device 2. This prevents halation from occurring in the image generated by the imaging device 2, thereby preventing the image quality from deteriorating.

[0074] As described above, according to the light emitting device 1 of this embodiment, even if the first light emitting section 11a and the second light emitting section 11b are incorporated into one light emitting device 1, it is possible to prevent the light emitting device 1 from becoming larger and to prevent the quality of the image captured by the imaging device 2 from deteriorating.

[0075] Furthermore, in the light-emitting device 1 according to this embodiment, the lens 20 has a light-guiding section 22 that guides visible light emitted from the second light-emitting section 11b, and the light-guiding section 22 is provided at a position that overlaps with the second light-emitting section 11b when viewed from the optical axis direction of the second light-emitting section 11b.

[0076] With this configuration, the white light emitted from the second light-emitting unit 11b can be incident on the light-guiding unit 22 and irradiated to the outside from the lens 20. As a result, it is possible to prevent the white light emitted from the second light-emitting unit 11b from traveling toward the vehicle body 110. This prevents a portion of the white light emitted from the second light-emitting unit 11b from being reflected by the vehicle body 110 of the moving object 100 and the reflected light from being detected by the imaging device 2. Therefore, even if the first light-emitting unit 11a and the second light-emitting unit 11b are turned on simultaneously, it is possible to prevent halation caused by the white light.

[0077] Furthermore, in the light emitting device 1 according to this embodiment, a portion of the near-infrared light emitted from the first light emitter 11a and traveling toward the vehicle body 110 is blocked by being absorbed or reflected by the mirror cover 121 or the buffer material 130. This effectively prevents the near-infrared light emitted from the first light emitter 11a from traveling toward the vehicle body 110, thereby effectively suppressing halation caused by the near-infrared light. In this way, in this embodiment, the light that causes halation out of the near-infrared light emitted from the first light emitter 11a is blocked by the mirror cover 121 or the buffer material 130.

[0078] Furthermore, in the light emitting device 1 according to the present embodiment, part of the near-infrared light emitted from the first light emitting unit 11a and traveling toward the vehicle body 110 is also blocked by the shade 30. This makes it possible to more effectively prevent the near-infrared light emitted from the first light emitting unit 11a from traveling toward the vehicle body 110.

[0079] Although the shade 30 is provided in this embodiment, the shade 30 does not necessarily have to be provided.

[0080] (Embodiment 2) Next, a light emitting device 1A according to embodiment 2 will be described with reference to Fig. 5. Fig. 5 is a diagram showing the configuration of light emitting device 1A according to embodiment 2. Note that in Fig. 5, similar to Fig. 4, the ray trajectories of near-infrared light emitted from first light-emitting section 11a are shown by solid lines, and the ray trajectories of white light emitted from second light-emitting section 11b are shown by dashed lines.

[0081] In the first embodiment, the first light-emitting unit 11a and the second light-emitting unit 11b are configured by different light sources, i.e., the first light source 10a and the second light source 10b. However, as shown in FIG. 5, in the light-emitting device 1A according to the present embodiment, the first light-emitting unit 11a and the second light-emitting unit 11b are configured by a single light source 10. That is, the light source 10 is configured such that the first light-emitting unit 11a and the second light-emitting unit 11b are provided in a single container 12 (package) and are integrated together. The light source 10 is also an SMD-type LED light source, like the first light source 10a and the second light source 10b, and is mounted on a substrate 40. Specifically, the light source 10 is arranged on the substrate 40 such that the second light-emitting unit 11b is located closer to the vehicle body 110 than the first light-emitting unit 11a.

[0082] In addition, since the first light-emitting unit 11a and the second light-emitting unit 11b are integrated, in this embodiment, the primary lens 50 arranged on the light emission side of the light source 10 covers not only the first light-emitting unit 11a but also the second light-emitting unit 11b. Therefore, not only the near-infrared light emitted from the first light-emitting unit 11a but also the white light emitted from the second light-emitting unit 11b is incident on the primary lens 50.

[0083] Furthermore, since first light-emitting section 11a and second light-emitting section 11b are integrated, in this embodiment, a recess into which the portion of primary lens 50 on the vehicle body 110 side fits is formed in a portion of light-guiding section 22A of lens 20A that faces second light-emitting section 11b. Therefore, the end face of second light-emitting section 11b in light-guiding section 22A is a curved surface that is curved in a concave manner.

[0084] Furthermore, in the above-described first embodiment, the entire lens 20 is made of a material that transmits both invisible light (specifically, near-infrared light) and visible light (specifically, white light). However, as shown in FIG. 5, in the light-emitting device 1A according to this embodiment, the lens 20A has a visible light-transmitting portion 21a made of a material that transmits visible light, and an invisible light-transmitting portion 21b made of a material that does not transmit visible light but transmits invisible light.

[0085] Specifically, light distribution control section 21A of lens 20A has visible light transmitting section 21a and invisible light transmitting section 21b. In the present embodiment, visible light transmitting section 21a is a section of light distribution control section 21A that is closer to vehicle body 110 than light guiding section 22A (including light guiding section 22), and invisible light transmitting section 21b is a section of light distribution control section 21A that is on the opposite side from vehicle body 110 than light guiding section 22.

[0086] The visible light transmitting portion 21a is made of a material that transmits white light, which is visible light, and transmits visible light. The material that constitutes the visible light transmitting portion 21a can be, for example, a transparent resin material or a transparent glass material that is transparent to visible light. Examples of the transparent resin material that can be used include polycarbonate resin, silicone resin, and acrylic resin.

[0087] Furthermore, the non-visible light transmitting portion 21b is made of a material that does not transmit white light, which is visible light, but transmits near-infrared light, which is invisible light. Specifically, the non-visible light transmitting portion 21b transmits near-infrared light, while blocking white light, which is visible light, by absorbing or reflecting it. A black resin material can be used as the material that forms the non-visible light transmitting portion 21b. The black resin material can transmit near-infrared light, which is invisible light, while absorbing and blocking white light, which is visible light.

[0088] In this way, although the visible light transmitting portion 21a and the non-visible light transmitting portion 21b are made of different materials, by using a resin material, the visible light transmitting portion 21a and the non-visible light transmitting portion 21b can be integrally formed by two-color molding. In the lens 20A of the present embodiment, only the non-visible light transmitting portion 21b is made of black resin, and the other portions are made of transparent resin. Such a lens 20A can be produced by two-color molding.

[0089] Furthermore, in this embodiment, the shade 30 in the first embodiment is not provided, but the shade 30 may also be provided in this embodiment.

[0090] Other than these points, the light emitting device 1A of this embodiment and the moving object including the same have the same configuration as the light emitting device 1 and the moving object 100 of the first embodiment.

[0091] In the light emitting device 1A configured in this manner, as shown by the solid line in FIG. 5, near-infrared light emitted from the first light emitting part 11a passes through the primary lens 50 and then enters the lens 20A.

[0092] At this time, part of the near-infrared light emitted from first light-emitting unit 11a and directed away from vehicle body 110 passes through primary lens 50 and then enters non-visible light transmitting unit 21b of light distribution control unit 21A. When passing through non-visible light transmitting unit 21b, the near-infrared light that has entered non-visible light transmitting unit 21b is refracted by non-visible light transmitting unit 21b and is irradiated onto the road surface toward the opposite side from vehicle body 110.

[0093] In this way, the near-infrared light emitted from the first light-emitting unit 11a has its light distribution angle widened by the primary lens 50 and the lens 20A and is irradiated over a wide area of ​​the road surface, but since the component of the light heading toward the vehicle body 110 is guided through the light-guiding unit 22A, the amount of light emitted from the first light-emitting unit 11a from the portion of the lens 20A located on the vehicle body 110 side is less than the amount of light emitted from the first light-emitting unit 11a from the portion of the lens 20A located on the opposite side of the vehicle body 110 side.

[0094] 5, the white light emitted from second light-emitting unit 11b passes through primary lens 50 and enters light-guiding unit 22A from the end face of light-guiding unit 22A of lens 20A. The white light that has entered light-guiding unit 22A is guided within light-guiding unit 22A while repeatedly undergoing total reflection on the side surfaces of light-guiding unit 22A, and then passes through visible light transmitting unit 21a of light distribution control unit 21A to be irradiated toward the road surface.

[0095] Furthermore, the white light emitted from second light-emitting unit 11b that travels in the direction opposite to vehicle body 110 passes through primary lens 50, and then enters and is blocked by non-visible light transmitting unit 21b of light distribution control unit 21A. In other words, non-visible light transmitting unit 21b can block the white light that does not enter light-guiding unit 22A and becomes stray light.

[0096] In this way, in the light-emitting device 1A of this embodiment, as in the above-mentioned embodiment 1, the near-infrared light emitted from the first light-emitting unit 11a is irradiated over a wide area while preventing it from traveling toward the vehicle body 110, while the white light emitted from the second light-emitting unit 11b is irradiated over a narrow area directly below.

[0097] As described above, in light emitting device 1A according to the present embodiment, the amount of near-infrared light emitted from first light-emitting unit 11a that is emitted from a portion of lens 20A located on the vehicle body 110 is smaller than the amount of near-infrared light emitted from first light-emitting unit 11a that is emitted from a portion of lens 20A located on the opposite side from the vehicle body 110. This prevents near-infrared light emitted from first light-emitting unit 11a from traveling toward vehicle body 110, thereby preventing halation from occurring in images generated by imaging device 2.

[0098] Therefore, as in the above-mentioned embodiment 1, even if the first light-emitting unit 11a and the second light-emitting unit 11b are incorporated into one light-emitting device 1, it is possible to prevent the light-emitting device 1A from becoming larger while also preventing the quality of the image captured by the imaging device 2 from deteriorating.

[0099] Furthermore, in the light emitting device 1A of the present embodiment, the first light emitting section 11a and the second light emitting section 11b are integrated into one light source 10. In other words, not only is the lens 20A common between the first light emitting section 11a and the second light emitting section 11b, but the light source itself is also common. This makes it possible to realize a light emitting device 1A that is even more compact than the light emitting device 1 of the first embodiment.

[0100] Furthermore, in the light-emitting device 1A of this embodiment, the lens 20A has a visible light transmitting portion 21a made of a material that transmits visible light, and an invisible light transmitting portion 21b made of a material that does not transmit visible light but transmits invisible light.

[0101] With this configuration, visible light (white light) that does not enter the light-guiding section 22A is blocked by the invisible light transmitting section 21b, while invisible light (near-infrared light) detected by the imaging device 2 is transmitted through the visible light transmitting section 21a and the invisible light transmitting section 21b. This makes it possible to irradiate a wide area with near-infrared light for monitoring purposes, while irradiating white light for illumination purposes with a desired light distribution (for example, spot light). In addition, near-infrared light caused by halation can be irradiated toward the opposite side of the vehicle body 110 and effectively utilized.

[0102] In the present embodiment, the lens 20A does not necessarily have to have the invisible light transmitting portion 21b. That is, the lens 20A may be composed of only the visible light transmitting portion 21a. For example, the entire lens 20A may be made of a transparent resin material, as in the first embodiment.

[0103] (Embodiment 3) Next, a light emitting device 1B according to embodiment 3 will be described with reference to Fig. 6. Fig. 6 is a diagram showing the configuration of light emitting device 1B according to embodiment 3. Note that in Fig. 6, similar to Fig. 4, the ray trajectories of near-infrared light emitted from first light-emitting section 11a are shown by solid lines, and the ray trajectories of white light emitted from second light-emitting section 11b are shown by dashed lines.

[0104] 6, in the light emitting device 1B according to the present embodiment, similarly to the above-described embodiment 2, the first light emitting section 11a and the second light emitting section 11b are configured by one light source 10. Note that in the present embodiment as well, the light source 10 is arranged on the substrate 40 such that the second light emitting section 11b is located closer to the vehicle body 110 than the first light emitting section 11a.

[0105] Furthermore, in this embodiment, the first light-emitting unit 11a and the second light-emitting unit 11b are integrated, and therefore the primary lens 50, which is arranged on the light emission side of the light source 10, has a notch 51 at a portion where the second light-emitting unit 11b and the light-guiding unit 22 overlap. The notch 51 is provided on the vehicle body 110 side of the primary lens 50. The side surface 50a of the primary lens 50 facing the vehicle body 110, which is formed by this notch 51, is a total reflection surface that totally reflects the near-infrared light emitted from the first light-emitting unit 11a toward the side opposite the vehicle body 110.

[0106] In the light-emitting device 1B configured in this manner, as shown by the solid line in Figure 6, the near-infrared light emitted from the first light-emitting unit 11a that is directed toward the opposite side of the vehicle body 110 passes through the primary lens 50, then enters the light distribution control unit 21 of the lens 20 and is irradiated onto the road surface.

[0107] Furthermore, part of the near-infrared light emitted from the first light-emitting unit 11a toward the vehicle body 110 is totally reflected by the side surface 50a (total reflection surface) of the primary lens 50 and travels in the opposite direction from the vehicle body 110. This makes it possible to increase the component of the near-infrared light emitted from the first light-emitting unit 11a that travels in the opposite direction from the vehicle body 110.

[0108] Note that, of the near-infrared light emitted from the first light-emitting unit 11a, light that is transmitted without being totally reflected by the side surface 50a of the primary lens 50 travels toward the vehicle body 110. A portion of the near-infrared light traveling toward the vehicle body 110 enters the light-guiding unit 22 from the side surface 22b of the light-guiding unit 22 opposite the vehicle body 110 side, is refracted in the light-guiding unit 22, and does not reach the outer surface of the light distribution control unit 21, but is absorbed or reflected by the mirror cover 121 of the door mirror 120 or the buffer material 130, and is blocked. Alternatively, a portion of the near-infrared light traveling toward the vehicle body 110 is blocked by the shade 30.

[0109] In this way, part of the near-infrared light emitted from the first light-emitting unit 11a toward the vehicle body 110 is totally reflected by the side surface 50a of the primary lens 50 and directed toward the opposite side from the vehicle body 110, and part of the light directed toward the vehicle body 110 is attenuated or blocked. As a result, the amount of light emitted from the first light-emitting unit 11a from the portion of the lens 20 located on the vehicle body 110 side can be made not less than the amount of light emitted from the first light-emitting unit 11a from the portion of the lens 20 located on the opposite side from the vehicle body 110 side.

[0110] 6, the white light emitted from second light-emitting unit 11b enters light-guiding unit 22 from the end face of light-guiding unit 22 of lens 20. The white light that has entered light-guiding unit 22 is guided within light-guiding unit 22 while repeatedly undergoing total reflection on the side surfaces of light-guiding unit 22, passes through light distribution control unit 21, and is irradiated toward the road surface.

[0111] In this way, in the light-emitting device 1B of this embodiment, as in the above-mentioned embodiment 1, the near-infrared light emitted from the first light-emitting unit 11a is irradiated over a wide area while preventing it from traveling toward the vehicle body 110, while the white light emitted from the second light-emitting unit 11b is irradiated over a narrow area directly below it.

[0112] As described above, in light emitting device 1B according to the present embodiment, the amount of near-infrared light emitted from first light-emitting unit 11a that is emitted from a portion of lens 20 located on the vehicle body 110 is smaller than the amount of near-infrared light emitted from first light-emitting unit 11a that is emitted from a portion of lens 20 located on the opposite side from the vehicle body 110. This prevents near-infrared light emitted from first light-emitting unit 11a from traveling toward the vehicle body 110, thereby preventing halation from occurring in images generated by imaging device 2.

[0113] Therefore, as in the above-mentioned embodiment 1, even if the first light-emitting unit 11a and the second light-emitting unit 11b are incorporated into one light-emitting device 1, it is possible to prevent the light-emitting device 1B from becoming larger while also preventing the quality of the image captured by the imaging device 2 from deteriorating.

[0114] Furthermore, in the light emitting device 1B of this embodiment, as in the above-mentioned embodiment 2, the first light emitting section 11a and the second light emitting section 11b are integrated into one light source 10, so that a more compact light emitting device 1B can be realized compared to the light emitting device 1 of the above-mentioned embodiment 1.

[0115] Although the shade 30 is provided in this embodiment, the shade 30 may not be provided, as in the light-emitting device 1C shown in FIG. 7. Furthermore, as in the light-emitting device 1C shown in FIG. 7, the light distribution control unit 21C of the lens 20C may have a visible light transmitting portion 21a and an invisible light transmitting portion 21b, as in the lens 20A in the second embodiment. This allows the visible light (white light) that does not enter the light-guiding portion 22 to be blocked by the invisible light transmitting portion 21b, while the invisible light (near-infrared light) detected by the imaging device 2 can be transmitted through the visible light transmitting portion 21a and the invisible light transmitting portion 21b. Therefore, the near-infrared light for monitoring purposes can be irradiated over a wide area, while the white light for illumination purposes can be irradiated with a desired light distribution (e.g., spot light). Furthermore, the near-infrared light caused by halation can be effectively utilized by irradiating it on the side opposite to the vehicle body 110.

[0116] (Fourth embodiment) Next, a light emitting device 1D according to embodiment 4 will be described with reference to Fig. 8. Fig. 8 is a diagram showing the configuration of light emitting device 1D according to embodiment 4. Note that in Fig. 8, similar to Fig. 4, the ray trajectories of near-infrared light emitted from first light-emitting section 11a are shown by solid lines, and the ray trajectories of white light emitted from second light-emitting section 11b are shown by dashed lines.

[0117] 8, in the light emitting device 1D according to the present embodiment, similarly to the above-described embodiments 2 and 3, the first light emitting portion 11a and the second light emitting portion 11b are configured by one light source 10. Note that in the present embodiment as well, the light source 10 is arranged on the substrate 40 such that the second light emitting portion 11b is located closer to the vehicle body 110 than the first light emitting portion 11a.

[0118] Furthermore, in the first embodiment, light guiding section 22 of lens 20 covers only second light-emitting section 11b, but in the present embodiment, light guiding section 22 of lens 20D covers not only second light-emitting section 11b but also first light-emitting section 11a. For this reason, light guiding section 22 is provided in the center of lens 20D, not on the vehicle body 110 side of lens 20.

[0119] Furthermore, in the present embodiment, similarly to the above-described embodiment 2, light distribution control section 21D of lens 20D has visible light transmitting section 21a made of a material that transmits visible light and invisible light transmitting section 21b made of a material that does not transmit visible light but transmits invisible light, but the region where invisible light transmitting section 21b is formed is different from that of the above-described embodiment 2. Specifically, in lens 20A in the above-described embodiment 2, invisible light transmitting section 21b is formed on a portion of light distribution control section 21A opposite to the vehicle body 110 side, and is not formed on a portion on the vehicle body 110 side, but in lens 20D in the present embodiment, invisible light transmitting section 21b is formed on a portion of light distribution control section 21D opposite to the vehicle body 110 side, and is also formed on a portion on the vehicle body 110 side. More specifically, the non-visible light transmitting section 21b is formed in a location other than the portion of the light distribution control section 21D where the light guiding section 22 is connected, and when viewed from above (i.e., when viewed from the Z-axis direction), the non-visible light transmitting section 21b is ring-shaped.

[0120] Furthermore, in this embodiment, the shade 30 in the first embodiment is not provided, but the shade 30 may also be provided in this embodiment.

[0121] Other than these points, the light emitting device 1D of this embodiment and the moving object including the same have the same configuration as the light emitting device 1 and the moving object 100 of the first embodiment.

[0122] In the light emitting device 1D configured in this manner, as shown by the solid line in FIG. 8, most of the near-infrared light emitted from the first light emitting part 11a passes through the primary lens 50 and then enters the lens 20D.

[0123] Specifically, most of the near-infrared light emitted from the first light-emitting unit 11a enters the light-guiding unit 22 of the lens 20, is guided within the light-guiding unit 22 while repeatedly being totally reflected on the side surfaces of the light-guiding unit 22, and passes through the visible light-transmitting unit 21a of the light distribution control unit 21D to be irradiated toward the road surface.

[0124] Furthermore, the near-infrared light emitted from first light-emitting unit 11a that is directed toward the opposite side from vehicle body 110 passes through primary lens 50 and then enters invisible light transmitting unit 21b in light distribution control unit 21D of lens 20D. When the near-infrared light enters invisible light transmitting unit 21b, it is refracted by invisible light transmitting unit 21b as it passes through, and is irradiated onto the road surface toward the opposite side from vehicle body 110.

[0125] The near-infrared light emitted from the first light-emitting unit 11a includes light that travels toward the vehicle body 110, but part of this light is absorbed or reflected by the mirror cover 121 of the door mirror 120 or the buffer material 130 and is blocked.

[0126] In this way, the near-infrared light emitted from the first light-emitting unit 11a has its light distribution angle widened by the primary lens 50 and the lens 20D and is irradiated onto a wide area of ​​the road surface, but by guiding most of the near-infrared light emitted from the first light-emitting unit 11a to the light-guiding unit 22, it is possible to reduce the component of light that heads toward the vehicle body 110. This makes it possible to reduce the amount of light that is emitted from a portion of the lens 20D that is located on the vehicle body 110 side out of the near-infrared light emitted from the first light-emitting unit 11a, compared to the amount of light that is emitted from a portion of the lens 20D that is located on the opposite side from the vehicle body 110 side out of the near-infrared light emitted from the first light-emitting unit 11a.

[0127] 8, the white light emitted from second light-emitting unit 11b passes through primary lens 50 and enters light-guiding unit 22 from the end face of light-guiding unit 22 of lens 20D. The white light that has entered light-guiding unit 22 is guided within light-guiding unit 22 while repeatedly undergoing total reflection on the side surfaces of light-guiding unit 22, and then passes through visible light transmitting unit 21a of light distribution control unit 21D to be irradiated toward the road surface.

[0128] Furthermore, of the white light emitted from the second light-emitting unit 11b, the light heading toward the vehicle body 110 and the light heading toward the opposite side of the vehicle body 110 pass through the primary lens 50, then enter the non-visible light transmitting unit 21b of the light distribution control unit 21D and are blocked by the non-visible light transmitting unit 21b.

[0129] Thus, in the light-emitting device 1D of this embodiment, similar to the above-described embodiment 1, the near-infrared light emitted from the first light-emitting section 11a is irradiated over a wide area while preventing it from traveling toward the vehicle body 110, while the white light emitted from the second light-emitting section 11b is irradiated over a narrow area directly below.

[0130] As described above, in light emitting device 1D according to the present embodiment, the amount of near-infrared light emitted from first light-emitting unit 11a that is emitted from a portion of lens 20D located on vehicle body 110 is smaller than the amount of near-infrared light emitted from first light-emitting unit 11a that is emitted from a portion of lens 20D located on the opposite side from vehicle body 110. This prevents near-infrared light emitted from first light-emitting unit 11a from traveling toward vehicle body 110, thereby preventing halation from occurring in images generated by imaging device 2.

[0131] Therefore, as in the above-mentioned embodiment 1, even if the first light-emitting section 11a and the second light-emitting section 11b are incorporated into one light-emitting device 1, it is possible to prevent the light-emitting device 1D from becoming larger while also preventing a decrease in the image quality of the image captured by the imaging device 2.

[0132] Furthermore, in the light emitting device 1D of this embodiment, as in the above-mentioned embodiments 2 and 3, the first light emitting section 11a and the second light emitting section 11b are integrated into one light source 10, so that a more compact light emitting device 1D can be realized compared to the light emitting device 1 of the above-mentioned embodiment 1.

[0133] Furthermore, in the light-emitting device 1D of this embodiment, the lens 20D has a visible light transmitting portion 21a made of a material that transmits visible light, and an invisible light transmitting portion 21b made of a material that does not transmit visible light but transmits invisible light.

[0134] With this configuration, visible light (white light) that does not enter the light-guiding section 22 is blocked by the invisible light transmitting section 21b, while invisible light (near-infrared light) detected by the imaging device 2 is transmitted through the visible light transmitting section 21a and the invisible light transmitting section 21b. This makes it possible to irradiate a wide area with near-infrared light for monitoring purposes, while irradiating white light for illumination purposes with a desired light distribution (for example, spot light). In addition, near-infrared light caused by halation can be irradiated toward the opposite side of the vehicle body 110 and effectively utilized.

[0135] In the present embodiment, the lens 20D does not necessarily have to have the invisible light transmitting portion 21 b. That is, the lens 20D may be composed of only the visible light transmitting portion 21 a. For example, the entire lens 20D may be made of a transparent resin material, as in the first embodiment.

[0136] (Variation) Although the light emitting device and the moving object according to the present invention have been described based on the embodiments, the present invention is not limited to the above-described embodiments.

[0137] For example, in the light-emitting device 1 in the first embodiment, the lens 20 is provided with the light-guiding section 22, but this is not limiting. Specifically, as in the light-emitting device 1E shown in FIG. 9, the lens 20E may not have the light-guiding section 22. Note that the light-emitting device 1E shown in FIG. 9 uses a light source 10 in which the first light-emitting section 11a and the second light-emitting section 11b are integrated. In this case, the light source 10 is disposed on the substrate 40 so that the first light-emitting section 11a is located closer to the vehicle body 110 than the second light-emitting section 11b. However, as in the second embodiment, the light source 10 may be disposed on the substrate 40 so that the second light-emitting section 11b is located closer to the vehicle body 110 than the first light-emitting section 11a.

[0138] 9, the shade 30 is made of a material (e.g., white resin) that blocks near-infrared light and white light, as in the first embodiment, but is not limited thereto. Specifically, as in the light-emitting device 1F shown in FIG. 10, the shade 30F may be made of a material that absorbs and blocks near-infrared light and transmits white light (e.g., NIR8000 or NIR8001 manufactured by Fine Polymers Co., Ltd.). In the light-emitting device 1F shown in FIG. 10, the light source 10 is disposed on the substrate 40 so that the first light-emitting unit 11a is located closer to the vehicle body 110 than the second light-emitting unit 11b. However, as in the light-emitting devices 1G and 1H shown in FIGS. 11 and 12, the light source 10 may be disposed on the substrate 40 so that the second light-emitting unit 11b is located closer to the vehicle body 110 than the first light-emitting unit 11a.

[0139] Furthermore, in the light emitting device 1 in the first embodiment, the first light source 10a and the second light source 10b are mounted on a common substrate 40, but this is not limiting. That is, the first light source 10a and the second light source 10b may be mounted on separate substrates. Specifically, as in the light emitting device 1I shown in FIG. 13, the first light source 10a may be mounted on a first substrate 41, and the second light source 10b may be mounted on a second substrate 42. In this case, as shown in FIG. 13, the second substrate 42 on which the second light source 10b including the second light emitter 11b is disposed may be used as a shade that blocks the invisible light (near-infrared light) emitted from the first light emitter 11a that is directed toward the vehicle body 110.

[0140] In the first to fourth embodiments, the second light-emitting unit 11b emitting white light is configured with an LED chip emitting blue light and a sealing member containing a yellow phosphor. However, this is not limiting. Specifically, the second light-emitting unit 11b may be configured to emit white light by combining a sealing member containing red and green phosphors with an LED chip emitting blue light, without using a yellow phosphor. The second light-emitting unit 11b may also use an LED chip emitting light other than blue light. For example, the second light-emitting unit 11b may be configured with an LED chip emitting ultraviolet light (UV light) and a sealing member containing phosphors of each of the three primary colors (red, green, and blue). The second light-emitting unit 11b may also be configured with a combination of an LED chip emitting blue light, an LED chip emitting red light, and an LED chip emitting green light.

[0141] In addition, in the above-described first to fourth embodiments, the first light source 10a, the second light source 10b, and the light source 10 are surface-mounted LED light sources, but this is not limiting. For example, the first light source 10a, the second light source 10b, and the light source 10 may be TO-CAN type LED light sources or COB type LED light sources in which an LED chip is directly mounted on a substrate.

[0142] In addition, in the above-described first to fourth embodiments, the first light source 10a, the second light source 10b, and the light source 10 are LED light sources using LEDs, but this is not limiting. For example, the first light source 10a, the second light source 10b, and the light source 10 may use solid-state light-emitting elements other than LEDs, such as semiconductor lasers or organic EL (Electro Luminescence).

[0143] Furthermore, in the above-described first to fourth embodiments, the light emitting device 1 and the imaging device 2 are separate bodies, but this is not limiting. Specifically, the light emitting device 1 and the imaging device 2 may be configured as an integrated light source unit.

[0144] In addition, the present invention also includes forms obtained by applying various modifications to the above-described embodiments that a person skilled in the art would conceive, and forms realized by arbitrarily combining the components and functions of the embodiments within the scope of the present invention. Furthermore, the present invention also includes any combination of two or more claims from the multiple claims set forth in the claims at the time of filing, provided that there is no technical contradiction. For example, when a dependent claim set forth in the claims at the time of filing is made into a multiple claim or multiple multiple claims that cite all of the superordinate claims within the scope of the technical contradiction, the present invention also includes all combinations of claims included in that multiple claim or multiple multiple multiple claims. [Explanation of symbols]

[0145] 1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I Light-emitting device 2. Imaging device 11a First light-emitting part 11b Second light-emitting part 20, 20A, 20C, 20D, 20E lenses, 21a Visible light transmitting part 21b Invisible light transmitting part 22, 22A light guide 22a, 22b side 30, 30E shade 42 Second board 50 Primary Lens 50a side 100 Mobile 110 Car body (first support) 120 Door mirror (second support)

Claims

1. A light emitting device attached to a second support supported by a first support, a first light emitting unit that emits invisible light that is detected by an imaging device attached to the second support; a second light emitting unit that emits visible light; a lens through which the invisible light emitted from the first light-emitting unit and the visible light emitted from the second light-emitting unit are transmitted, an amount of the invisible light emitted from a portion of the lens located on the first support side, out of the invisible light emitted from the first light-emitting unit, is smaller than an amount of the invisible light emitted from a portion of the lens located on the opposite side to the first support side, out of the invisible light emitted from the first light-emitting unit; Light-emitting device.

2. The lens has a visible light transmitting portion made of a material that transmits visible light, and an invisible light transmitting portion made of a material that does not transmit visible light but transmits invisible light. The light emitting device according to claim 1 .

3. the lens has a light guide portion that guides the visible light emitted from the second light emitting portion, The light guide portion is provided at a position overlapping the second light emitting portion when viewed from the optical axis direction of the second light emitting portion. The light emitting device according to claim 1 .

4. a side surface of the light guiding unit facing the first support body is inclined more gently than a side surface of the light guiding unit facing away from the first support body; The light emitting device according to claim 3 .

5. a primary lens having a semi-dome shape onto which the invisible light emitted from the first light-emitting unit is incident, the primary lens has a side surface that totally reflects the invisible light toward an opposite side to the first support. The light emitting device according to claim 1 .

6. a shade that blocks light that is emitted from the first light-emitting unit and travels toward the first support; The light emitting device according to any one of claims 1 to 5.

7. a substrate on which a light source including the second light-emitting unit is disposed, The shade is the substrate. The light emitting device according to claim 6 .

8. The light emitting device according to any one of claims 1 to 5, the imaging device; the second support, The first support is a vehicle body. Mobile object.

Images