JP2016004641A - Luminaire and vehicle mounting the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve safe driving even in a state where a front visual field cannot be sufficiently secured due to, for example, fog and rain, with regard to a luminaire and a vehicle mounting the same.SOLUTION: A luminaire is configured in such a manner that a front travelling environment is detected by reflected infrared rays from the front received by an infrared ray receiving element 11, and then, based on the detected front travelling environment, a travelling auxiliary line 31 is displayed on a road surface 30. For example, in a bad weather in which a front visual field cannot be sufficiently secured due to fog and rain, driving referring to the travelling auxiliary line 31 becomes possible, and this can contribute to safe driving.

Description

  The present invention relates to, for example, an illuminating device used as a headlight of an automobile and an automobile equipped with the same.

  For example, in automobiles, it has been proposed to calculate the travel path of the vehicle by detecting the operation state of the steering wheel, the angular velocity with respect to the main body, acceleration, etc., and to display the predicted travel line on the road surface by the lighting device (The following Patent Document 1 exists as a prior document similar to this).

JP 2003-285658 A

  In the above conventional example, by displaying the predicted travel line on the road surface, the driver of the own vehicle or other vehicle, or a pedestrian is informed of the existence of the own vehicle and the predicted travel route, and is provided for each safe operation. I am doing so.

  However, even if such a configuration is used, after all, it is only understood what route the vehicle travels, and for example, it is not useful in abnormal weather.

  For example, in a situation where the forward visibility cannot be secured due to fog and it is difficult to drive, it is not possible to contribute to safe driving simply by understanding which direction to proceed if it continues as it is.

  Therefore, an object of the present invention is to contribute to safe driving.

  In order to achieve this object, the present invention provides a main body case having an opening on the front side, a translucent cover covering the opening of the main body case, and facing the cover in the main body case. A lens disposed in a portion to be lighted, a light scanning unit disposed on a light incident side of the lens, an illuminator for supplying light toward the light scanning unit, and the illuminator and the light scanning unit A controller, an infrared light receiving element connected to the controller, and a travel assist line display / operator, wherein the illuminator has a plurality of light emitting elements, and at least one of the plurality of light emitting elements is a red light An external light emitting element (IR light emitting element) is used, and when the travel auxiliary line display / operator is operated, the controller controls a front traveling environment by reflected infrared light received from the front by the infrared light receiving element. Out, then, based on the detected forward traveling environment, a configuration of displaying the travel auxiliary lines on the road surface, thereby is to achieve the intended purpose.

As described above, the present invention is disposed in a main body case having an opening on the front side, a translucent cover that covers the opening of the main body case, and a portion facing the cover in the main body case. A lens, a light scanning means disposed on the light incident side of the lens, an illuminator for supplying light toward the light scanning means, a controller connected to the illuminator and the light scanning means, An infrared light receiving element connected to the controller, and a travel auxiliary line display operation device, wherein the illuminator has a plurality of light emitting elements, and at least one of the plurality of light emitting elements includes an infrared light emitting element ( IR light emitting element), and the controller detects the forward traveling environment by the reflected infrared light received from the front light received by the infrared light receiving element when the travel auxiliary line display operation device is operated. Based on the forward travel environment, since it is that a configuration of displaying the travel auxiliary lines on the road surface, it is possible to contribute to safe driving.

  That is, in the present invention, the forward traveling environment is detected by the reflected infrared rays received from the front received by the infrared light receiving element, and then the traveling auxiliary line is displayed on the road surface based on the detected forward traveling environment. Therefore, it is possible to drive with reference to this driving assistance line, which can contribute to safe driving.

The front view which shows the motor vehicle carrying the illuminating device of Embodiment 1 of this invention. Same as above, enlarged sectional view of the lighting device part of the car Same as above, enlarged front view of the lighting device part of the car Same configuration diagram of lighting device Same as above, control block diagram of lighting device The figure explaining the operation of the lighting device The figure explaining the operation of the lighting device The figure explaining the operation of the lighting device Same as above, operation flowchart of lighting device The figure explaining the operation of the lighting device The block diagram which shows the illuminating device of Embodiment 2 of this invention. Same as above, control block diagram The block diagram which shows the illuminating device of Embodiment 3 of this invention. Same as above, control block diagram Same as above, operation flowchart of lighting device

  Hereinafter, an example in which a lighting device according to an embodiment of the present invention is mounted on an automobile will be described with reference to the accompanying drawings.

(Embodiment 1)
In FIG. 1, lighting devices 3 called headlights are arranged on both front sides of a main body 2 of the automobile 1.

  As shown in FIGS. 2 and 3, the lighting device 3 includes a main body case 5 having an opening 4 on the front side, a translucent cover 6 that covers the opening 4 of the main body case 5, and the main body case 5. A lens 7 disposed in a portion facing the cover 6, a light scanning unit 8 disposed on the light incident side of the lens 7, and an illuminator 9 for supplying light toward the light scanning unit 8. A control unit 10 connected to the illuminator 9 and the optical scanning means 8 and an infrared light receiving element 11 connected to the control unit 10 are provided.

  As shown in FIG. 4, the illuminator 9 includes a red light emitting element (R light emitting element) 12, a blue light emitting element (B light emitting element) 13, and an infrared light emitting element (IR light emitting element) to form illumination light. ) 14.

  Further, between the red light emitting element (R light emitting element) 12 and the optical scanning unit 8, the collimating lens 15 and the red light (R) are sequentially arranged from the red light emitting element (R light emitting element) 12 toward the optical scanning unit 8. ), And a mirror 16 and a collimating lens 17 for reflecting other colors.

  Next, between the blue light emitting element (B light emitting element) 13 and the light scanning unit 8, the collimating lens 18 and the blue light ( A mirror 19, a mirror 16, and a collimating lens 17 that reflect only B) and pass other colors are disposed.

  Next, between the infrared light emitting element (IR light emitting element) 14 and the optical scanning unit 8, the collimating lens 20, in order from the infrared light emitting element (IR light emitting element) 14 toward the optical scanning unit 8, One optical path of the beam separator 21, the wavelength conversion element 22, the mirror 23 that reflects green light (G), the mirror 24 that reflects only infrared light (IR), and the other light that passes through, the mirror 19, the mirror 16, and a collimating lens 17 is arranged.

  The other optical path of the beam separator 21 reaches the optical scanning unit 8 via the mirror 24, the mirror 19, the mirror 16, and the collimating lens 17 that reflects only infrared light (IR) and passes other light. It has become.

  Further, as shown in FIG. 5, the infrared light receiving element 11, the red light emitting element (R light emitting element) 12, the blue light emitting element (B light emitting element) 13, and the infrared light emitting element (IR light emitting element) 14 are controlled. Connected to the unit 10.

  In addition to this, the control unit 10 drives the driving unit 25 for driving the optical scanning unit 8, drives the engine, turns on the light, and displays the driving assistance line (31 in FIG. 6). An operating device 27 is connected to the camera.

  That is, the optical scanning unit 8 is configured by the mirror 28 and the driving unit 25 shown in FIG. 4, and the driving unit 25 is connected to the control unit 10.

  The infrared light receiving element 11 connected to the control unit 10 is arranged on the front side of the lens 7 in the main body case 5 as shown in FIG. Prevents incidence.

  In addition, as shown in FIG. 2, the infrared light receiving element 11 is also disposed outside the light irradiation range 29 of the lens 7.

  The greatest feature of the present embodiment is that a driving assistance line 31 as shown in FIG. 6 is displayed on the road surface 30.

  The operation device 27 is operated when the travel assist line 31 is displayed on the road surface 30. For example, when the front view is not sufficiently secured due to fog or heavy rain, the operation device 27 is operated. As shown in FIG. 6, a travel assist line 31 indicating a recommended travel direction is displayed on the road surface 30 by the lighting device 3.

  FIG. 7 shows a state where the road is narrow, such as a mountain road or a river bank road, and both sides are rapidly lowered. When the forward visibility cannot be sufficiently secured due to heavy rain or the like, the operating device 27 is operated as described above, and the driving assistance line 31 indicating the recommended driving direction is displayed on the road surface 30 by the lighting device 3.

Further, FIG. 8 shows a state where the road is narrow and the road 32 is approaching the walls 32 on both sides, and the road is viewed forward by fog and heavy rain while driving. Even when the vehicle cannot be sufficiently secured, as described above, the operating device 27 is operated, and the driving assistance line 31 indicating the recommended driving direction is displayed on the road surface 30 by the lighting device 3.

  Hereinafter, the formation of the travel assist line 31 will be mainly described.

  First, when an operation for starting an engine (not shown) is performed with the operation device 27, the control unit 10 starts the engine.

  In addition, when the operation unit 27 performs an operation of turning on the light, the control unit 10 displays the infrared light receiving element 11, the red light emitting element (R light emitting element) 12, the blue light emitting element (B light emitting element) 13 in FIG. While energizing the infrared light emitting element (IR light emitting element) 14, the drive unit 25 of the optical scanning means 8 reciprocates the mirror 28 (S1 in FIG. 9).

  As a result, the red light (R) emitted from the red light emitting element (R light emitting element) 12 passes through the collimating lens 15, then passes only the red light (R), and reflects other colors. 16 and then reaches the collimating lens 17.

  Further, the blue light (B) emitted from the blue light emitting element (B light emitting element) 13 passes through the collimating lens 18, and then reflects only the blue light (B) and the mirror 19 that passes other colors. And then reflected by the mirror 16 to reach the collimating lens 17.

  Further, infrared light (IR) emitted from the infrared light emitting element (IR light emitting element) 14 passes through the collimating lens 20, is branched in two by the beam separator 21, and travels in one optical path. (IR) is converted into green light (G) by the wavelength conversion element 22, then reflected by the mirror 23 that reflects the green light (G), and then passes through the mirror 24 and the mirror 19. The light is reflected by the mirror 16 and reaches the collimating lens 17.

  And in this collimating lens 17 part, red light (R), blue light (B), and green light (G) are combined, and thereby white light is formed.

  In a state where the white light reaches the mirror 28, the control unit 10 drives the drive unit 25 of the optical scanning unit 8 to reciprocate the mirror 28.

  As a result, as shown in FIG. 6, white light is applied to the front portion of the automobile 1 and illumination is performed.

  The reciprocating motion of the mirror 28 by the drive unit 25 of the light scanning unit 8 is performed at a very high speed, so that the driver can recognize that the road surface 30 is uniformly illuminated with white light.

  Further, in the state where such illumination is performed, the other infrared light (IR) branched in two directions by the beam separator 21 first reflects only the infrared light (IR) and allows other light to pass through. The light is reflected by the mirror 24, then passes through the mirror 19, then is reflected by the mirror 16, and then passes through the collimating lens 17 and reaches the mirror 28 of the optical scanning unit 8.

  As described above, since the mirror 28 is reciprocated by the drive unit 25 of the optical scanning unit 8, infrared light (IR) is applied to the illumination range of the white light uniformly irradiated on the front portion of the automobile 1. Will be irradiated.

As described above, the most significant feature of the present embodiment is, for example, when the front view is not sufficiently secured due to fog or heavy rain (in the case of bad weather), the road assist line 3 as shown in FIG.
In such bad weather, as shown in FIG. 6, the operating device 27 is operated to display the driving assistance line 31 indicating the recommended driving direction on the road surface 30 by the lighting device 3 (see FIG. 6). S2 in FIG.

  Hereinafter, this point will be described in detail.

  For example, when the forward visibility cannot be sufficiently secured due to fog or heavy rain, the driver performs an operation for displaying the travel assistance line 31 with the operation device 27 as described above (S2 in FIG. 9).

  In this case, first, the infrared light (IR) described above is used to detect the driving environment in front of the automobile 1 (S3 in FIG. 9).

  For example, in the state of FIG. 6, since the left and right of the traveling direction of the automobile 1 are cliffs, the fact that there is no road surface 30 that can travel is that infrared light (IR) from this cliff portion. It can be detected by the absence of reflection. Further, the width of the road surface 30 can also be detected.

  For this reason, the control part 10 shall form the driving assistance line 31 in the part of 50 centimeters from the left side of the road surface 30 of the advancing direction of the motor vehicle 1, for example, and the part of 2 meters right side from this part (S4 of FIG. 9). ).

  Specifically, when light is irradiated onto the corresponding portions of the travel assist line 31 by the mirror 28, the control unit 10 turns off the blue light emitting element (B light emitting element) 13.

  So far, red light (R), blue light (B) and green light (G) are combined, and white light is formed, but red light (R) and green light (G) are combined. As a result, yellow light is formed, thereby forming a yellow driving assistance line 31 in the above-mentioned portion of the road surface 30.

  Such a yellow driving assistance line 31 on the road surface 30 is easy for the driver to visually check even in bad weather as described above, and by driving with reference to the driving assistance line 31, it is safe. You can drive.

  Further, since the control unit 10 can detect that the road is bent as shown in FIG. 10, the driving assistance line 31 is also bent on the road surface 30 of the bent road according to the curve as shown in FIG. The driving assistance line 31 can be displayed.

  As shown in FIG. 10, the driving assistance line 31 is displayed on the road surface 30 in front of the automobile 1 in correspondence with the curve of the road.

  Therefore, the driver can perform safe driving with the travel assist line 31 as a mark even when the forward visibility is poor.

  In the present embodiment, the blue light emitting element (B light emitting element) 13 can be turned off and then turned on and the mirror 28 can be driven at a high speed when the above-described travel assist line 31 is formed. In this part, white illumination can be performed uniformly.

  In addition, since infrared light (IR) is uniformly applied to the front portion of the automobile 1, when a driving caution object (for example, an oncoming vehicle or a pedestrian) exists in the front portion of the automobile 1. In addition, it can be detected by receiving the reflected light from the infrared light receiving element 11.

  In the present embodiment, the driving assistance line 31 is formed on the left side of the road surface 30 in the traveling direction of the automobile 1, for example, on the 50 cm portion and on the right side 2 meters from this portion. In Japan, it is a rule that the car 1 travels on the left side. Therefore, in the country where the car 1 travels on the right side, the driving assistance line 31 is in the direction of travel of the car 1. For example, a part 50 cm from the right side of the road surface 30 and a part 2 meters to the left of this part are formed.

In this way, after the safe driving is performed, if the engine 27 is stopped and the light is turned off by the operating device 27, the engine is stopped, the infrared light receiving element 11, the red light emitting element (R light emitting element) 12, and the blue light emitting. Energization to the element (B light emitting element) 13, the infrared light emitting element (IR light emitting element) 14, and the drive unit 25 of the optical scanning means 8 is cut off (S5 in FIG. 9).
(Embodiment 2)
11 and 12 show another embodiment of the present invention.

  In this embodiment, a green light emitting element (G light emitting element) 26 is provided with respect to the above (Embodiment 1).

  That is, in (Embodiment 1), the wavelength conversion element 22 is used to form green light, but in this (Embodiment 2), green light is emitted from the green light emitting element (G light emitting element) 26. It was decided to form.

  Accordingly, between the green light emitting element (G light emitting element) 26 and the optical scanning means 8, the collimating lens 33, in order from the green light emitting element (G light emitting element) 26 to the optical scanning means 8, A mirror 34, a mirror 19, a mirror 16, and a collimating lens 17 that reflect green light (G) and allow other light to pass through are arranged.

  Further, between the infrared light emitting element (IR light emitting element) 14 and the optical scanning unit 8, the collimating lens 20 and red are sequentially arranged from the infrared light emitting element (IR light emitting element) 14 toward the optical scanning unit 8. A mirror 35, a mirror 34, a mirror 19, a mirror 16, and a collimating lens 17 that reflect external light (IR) are arranged.

  In addition, other configuration operations in this embodiment are the same as those in (Embodiment 1).

Therefore, as in the case of (Embodiment 1), the operation of this (Embodiment 2) is also performed when the travel assist line 31 is formed, and the blue light emitting element (B light emitting element) 13 is turned off and thereafter turned on.
(Embodiment 3)
13 to 15 show (Embodiment 3) of the present invention.

  In this embodiment, the configuration of the illumination device 3 upstream of the light scanning means 8 is changed.

  Specifically, first, as an example of a blue light emitting element (B light emitting element), a blue laser element 36 that emits blue light is provided, and between the blue laser element 36 and the optical scanning unit 8, the blue laser element 36 is provided. A color conversion element 37 that produces red light (R), green light (G), and blue light (B) from blue light from the blue laser element 36, a collimating lens 38, and infrared light in order toward the optical scanning means 8. A mirror 39 that reflects (IR) and allows other light to pass therethrough is provided.

Further, between the infrared light emitting element (IR light emitting element) 14 and the optical scanning unit 8, infrared light (IR light) is sequentially arranged from the infrared light emitting element (IR light emitting element) 14 toward the optical scanning unit 8. ) And the mirror 39 are disposed.

  The color conversion element 37 is constituted by a rotating wheel using a phosphor, and as is well known, the blue light emitted from the blue laser element 36 is rotated, as shown in FIG. As in the upper right part, the light is converted into red light (R), green light (G), and blue light (B).

  In this way, in the state where the red light (R), the green light (G), and the blue light (B) are all formed in order, on the road surface 30 as in the above (Embodiment 1). It will be in the state irradiated with white light.

  Further, when the driving assist line 31 is formed, the output of the blue laser element 36 is reduced at the timing when the color conversion element 37 forms blue light (B) by rotation as shown in the lower right of FIG. A yellow travel auxiliary line 31 is formed.

  That is, in this way, the red light (R) and the green light (G) are mainly irradiated to the travel auxiliary line 31 portion, so that the yellow travel auxiliary line 31 is formed in human eyes. It looks like a state.

  Infrared light (IR) from the infrared light receiving element 11 always reaches the light scanning means 8 via the mirror 40 and the mirror 39 and is irradiated to the light irradiation range 29 to detect the driving environment.

  In order to perform such an operation, as shown in FIG. 14, a blue laser element 36, a color conversion element 37, an infrared light receiving element 11, an infrared light emitting element (IR light emitting element) 14, a drive unit 25, an operation The device 27 is connected to the control unit 10.

  In the above configuration, also in this (Embodiment 3), when the forward visibility cannot be sufficiently secured due to fog or heavy rain, the operating device 27 is operated as described above, and the road surface 30 as shown in FIG. The driving assistance line 31 indicating the recommended driving direction is displayed by the lighting device 3.

  First, when an operation for starting an engine (not shown) is performed with the operation device 27, the control unit 10 starts the engine.

  When the operation unit 27 is used to turn on the light, the control unit 10 causes the infrared light receiving element 11, the infrared light emitting element (IR light emitting element) 14, the blue laser element 36, and the color conversion element shown in FIG. While energizing 37, the drive unit 25 of the optical scanning means 8 reciprocates the mirror 28 (S1 in FIG. 15).

  As a result, the blue light from the blue laser element 36 is sequentially converted into red light (R), blue light (B), and green light (G) by the color conversion element 37, and enters the light irradiation range 29 of the road surface 30. As a result, the front of the automobile 1 is illuminated with white light.

  The rotation speed of the color conversion element 37 is high, and the reciprocating motion of the mirror 28 by the drive unit 25 of the optical scanning means 8 is also performed at an extremely high speed. Therefore, the road surface 30 is uniformly white light for the driver. It can be recognized that it is illuminated.

  Further, in the state where such illumination is performed, infrared light (IR) is always reflected by the mirrors 40 and 39 and reaches the mirror 28 of the optical scanning means 8.

As described above, since the mirror 28 is reciprocated by the drive unit 25 of the optical scanning unit 8, infrared light (IR) is applied to the illumination range of the white light uniformly irradiated on the front portion of the automobile 1. Will be irradiated.

  As described above, the most significant feature of the present embodiment is that, for example, when the forward visibility cannot be sufficiently secured due to fog or strong rain (in the case of bad weather), a driving assistance line 31 as shown in FIG. In such bad weather, as shown in FIG. 6, the operating device 27 is operated in order to display the driving assistance line 31 indicating the recommended driving direction on the road surface 30 by the lighting device 3 (FIG. 15). S2).

  Hereinafter, this point will be described in detail.

  For example, when the forward visibility cannot be sufficiently secured due to fog or heavy rain, the driver performs an operation for displaying the travel assist line 31 with the operating device 27 as described above (S2 in FIG. 15).

  In this case, first, the infrared light (IR) described above is used to detect the driving environment in front of the automobile 1 (S3 in FIG. 15).

  For example, in the state of FIG. 6, since the left and right of the traveling direction of the automobile 1 are cliffs, the fact that there is no road surface 30 that can travel is that infrared light (IR) from this cliff portion. It can be detected by the absence of reflection. Further, the width of the road surface 30 can also be detected.

  For this reason, the control part 10 shall form the driving assistance line 31 in the part of 50 centimeters from the left side of the road surface 30 of the advancing direction of the motor vehicle 1 and the part 2 meters right side from this part (S4 of FIG. 15). ).

  Specifically, when the mirror 28 irradiates light corresponding to the travel assist line 31, the control unit 10 controls the blue laser element at the timing when the color conversion element 37 forms blue light (B) by rotation. By reducing the output of 36, the yellow driving assistance line 31 is formed on the road surface 30.

  That is, in this way, the red light (R) and the green light (G) are mainly irradiated to the travel auxiliary line 31 portion, so that the yellow travel auxiliary line 31 is formed in human eyes. It looks like a state.

  Such a yellow driving assistance line 31 on the road surface 30 is easy for the driver to visually check even in bad weather as described above, and by driving with reference to the driving assistance line 31, it is safe. You can drive.

  Further, since the control unit 10 can detect that the road is bent as shown in FIG. 10, the driving assistance line 31 is also bent on the road surface 30 of the bent road according to the curve as shown in FIG. The driving assistance line 31 can be displayed.

  As shown in FIG. 10, the driving assistance line 31 is displayed on the road surface 30 in front of the automobile 1 in correspondence with the curve of the road.

  Therefore, the driver can perform safe driving with the travel assist line 31 as a mark even when the forward visibility is poor.

In the present embodiment, when the above-described travel assist line 31 is formed, the output of the blue laser element 36 is lowered, the output recovery thereafter, and the mirror 28 can be driven at high speed. , White illumination can be performed uniformly.

  In addition, since infrared light (IR) is uniformly applied to the front portion of the automobile 1, when a driving caution object (for example, an oncoming vehicle or a pedestrian) exists in the front portion of the automobile 1. In addition, it can be detected by receiving the reflected light from the infrared light receiving element 11.

  In the present embodiment, the driving assistance line 31 is formed on the left side of the road surface 30 in the traveling direction of the automobile 1, for example, at a portion of 50 centimeters and a portion 2 meters to the right of this portion. In the country, since it is a rule that the automobile 1 travels on the left side, in the country where it is a rule that the automobile 1 travels on the right side, the driving assistance line 31 is a road surface in the traveling direction of the automobile 1. For example, a portion of 50 centimeters from the right side of 30 and a portion 2 meters to the left of this portion are formed.

  In this way, after the safe driving is performed, the engine is stopped and the light is turned off by the operation device 27, the engine is stopped, the infrared light receiving element 11, the infrared light emitting element (IR light emitting element) 14, Energization of the blue laser element 36, the color conversion element 37, and the drive unit 25 of the optical scanning means 8 is cut off (S5 in FIG. 15).

  As described above, the present invention is configured to detect the forward traveling environment by the reflected infrared light from the front received by the infrared light receiving element, and then to display the traveling auxiliary line on the road surface based on the detected forward traveling environment. Therefore, it is possible to drive with reference to the driving assistance line, and contribute to safe driving.

  Therefore, the use as an illuminating device and a car equipped with the lighting device is expected.

DESCRIPTION OF SYMBOLS 1 Car 2 Main body body 3 Illuminating device 4 Opening part 5 Main body case 6 Cover 7 Lens 8 Optical scanning means 9 Illuminator 10 Control part 11 Infrared light receiving element 12 Red light emitting element (R light emitting element)
13 Blue light emitting device (B light emitting device)
14 Infrared light emitting device (IR light emitting device)
DESCRIPTION OF SYMBOLS 15 Collimating lens 16 Mirror 17 Collimating lens 18 Collimating lens 19 Mirror 20 Collimating lens 21 Beam separator 22 Wavelength conversion element 23 Mirror 24 Mirror 25 Drive part 26 Green light emitting element (G light emitting element)
27 Actuator 28 Mirror 29 Light irradiation range 30 Road surface 31 Travel assist line 32 Wall 33 Collimating lens 34 Mirror 35 Mirror 36 Blue laser element 37 Color conversion element 38 Collimating lens 39 Mirror 40 Mirror

Claims (10)

A main body case having an opening on the front side, a translucent cover covering the opening of the main body case, a lens disposed in a portion facing the cover in the main body case, and light of the lens Optical scanning means disposed on the incident side, an illuminator for supplying light toward the optical scanning means, a controller connected to the illuminator and the optical scanning means, and an infrared light receiving element connected to the controller And a driving assistance line display operation device, wherein the illuminator has a plurality of light emitting elements, and at least one of the plurality of light emitting elements is an infrared light emitting element (IR light emitting element), and the control When the travel assist line display / operation device is operated, a detector detects the forward traveling environment by the reflected infrared light received from the front received by the infrared light receiving element, and then, based on the detected forward traveling environment. Can, configuration and the lighting device for displaying the travel auxiliary lines on the road surface. The illuminator splits a red light emitting element (R light emitting element), a blue light emitting element (B light emitting element), an infrared light emitting element (IR light emitting element), and an infrared light emitting element (IR light emitting element). The illuminating device according to claim 1, comprising a beam separator and a wavelength conversion element that converts the wavelength of one of the infrared light beams dispersed by the beam separator into green light. The illuminator includes a red light emitting element (R light emitting element), a blue light emitting element (B light emitting element), a green light emitting element (G light emitting element), and an infrared light emitting element (IR light emitting element). The lighting device according to claim 1. The illuminator generates red light (R), green light (G), and blue light (B) from a blue light emitting element (B light emitting element) and blue light from the blue light emitting element (B light emitting element). The lighting device according to claim 1, wherein the lighting device has a conversion element and an infrared light emitting element (IR light emitting element). The lighting device according to claim 4, wherein the color conversion element is configured by a rotating wheel. The illumination device according to claim 1, wherein the optical scanning unit includes a mirror and a driving unit that drives the mirror. The illumination device according to any one of claims 1 to 6, wherein the infrared light receiving element is disposed on a lens front side in a main body case. The lighting device according to any one of claims 1 to 7, wherein the controller is configured to display a travel assist line for yellow light on a road surface. The lighting device according to any one of claims 1 to 8, wherein the controller is configured to display a travel assistance line inside a predetermined interval from a traveling obstacle environment on a road surface. The motor vehicle which has arrange | positioned the illuminating device as described in any one of Claims 1-9 in the front side of the main body body.