JP2015201296A - Vehicular lighting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting tool in which a person, who views from a vehicle front a laser light of red or the like other than white for drawing a warning mark or the like to the vehicle front, does not recognize the laser light as a head light.SOLUTION: A vehicular lighting tool 1 includes a laser light source 7 capable of emitting a laser beam B2. In the vehicular lighting tool for emitting the laser beam B2 generated by the laser light source 7 forward from an emission end 32a, provided is a light shading member 34 for shading light from above the emission end 32a to at least the front horizontal position of the emission end.

Description

  The present invention relates to a vehicular lamp including a drawing device that draws a figure for alerting a driver or the like of a running vehicle in front of the vehicle with a laser beam.

  Patent Document 1 discloses a laser drawing apparatus that urges a driver of a vehicle to draw attention by drawing a predetermined warning mark indicating a road condition on a road surface in a vehicle traveling direction with a laser beam. The laser drawing apparatus of the drawing system of Patent Document 1 drives a laser head that irradiates a laser to draw a mark on a road surface.

JP 2008-45870 A

  In a laser drawing apparatus as shown in Patent Document 1, a warning mark can be drawn on a road surface in front of a vehicle by a red laser beam meaning a warning from the viewpoint of strongly recognizing that the driver is a “warning”. is there. However, if the laser beam such as red emitted to the front of the vehicle is mistakenly recognized as constituting a part of the headlamp, it may be mistaken for the tail lamp or the like. There is a risk of violating laws and regulations that stipulate that it is “white”.

  In view of the above problems, the present invention prevents the laser light of red or the like other than white that draws a warning mark or the like in front of the vehicle from being recognized by a person viewed from the front of the vehicle as constituting a vehicle headlamp. The purpose is to provide a vehicular lamp.

  The vehicular lamp according to claim 1 is a laser light source capable of emitting laser light, and a vehicle headlamp that emits laser light generated by the laser light source forward from the emission end, at least from above the emission end. A light shielding member that shields light up to a horizontal position in front of the emission end is provided.

  (Operation) Since the emitting end that emits the laser light is concealed behind the light shielding member, the emitting end is not visually recognized from the front even if it emits red light.

  Claim 2 is the vehicular lamp according to claim 1, wherein a second light source that generates white or yellow light distribution pattern forming light, a translucent member that transmits the light distribution pattern formation light, The emission end is arranged so as to emit the laser light obliquely downward toward the transmission region of the light distribution pattern forming light in the light transmissive member.

  When a laser beam of red or the like that draws a figure such as a warning mark passes through the light transmitting member and is emitted forward, there is a risk of irregular reflection due to dirt or scratches attached to the light transmitting member of the vehicular lamp. The irregularly reflected red or the like laser light may be recognized as a part of the headlamp by a pedestrian or the like viewed from the front of the vehicle.

  (Function) However, in the vehicular lamp according to claim 2 of the present application, red or the like that is directed obliquely downward in the transmission region of the translucent member, that is, the region in which the luminous flux of the light distribution pattern such as white color passes through the translucent member. The laser beam intersects with the luminous flux of the light distribution pattern forming light such as white having higher luminance. As a result, even if irregular reflection occurs in the translucent member by the laser beam of red or the like, the irregularly reflected light of red or the like is not visually recognized from the front because the irregularly reflected light of red or the like is erased by white light or the like.

  A third aspect of the present invention provides a vehicular lamp according to the second aspect, wherein the lamp body has an opening on the front side and houses the light source and the emission end on the inside, and the lamp body so as to close the opening. And a front cover which is the translucent member attached to the.

(Operation) In the vehicular lamp according to the third aspect of the present invention, in the transmission region of the front cover, the laser beam of red or the like intersects with the luminous flux of the white light distribution pattern forming light with higher luminance. As a result, even if irregular reflection occurs on the front cover by a laser beam such as red, the irregularly reflected red light is erased by the white light, so that the red irregular reflection light is not visually recognized from the front.

  According to the vehicular lamp of the third aspect, the driver of the oncoming vehicle or the pedestrian who looks at the vehicular lamp from the front cannot see the irregularly reflected light such as red other than white on the front cover. It cannot be recognized that the headlight is composed of other laser light.

  A fourth aspect of the present invention is the vehicular lamp according to the second or third aspect, wherein the emission end is disposed above the second light source.

  (Operation) The laser beam emitted from the emission end is incident on a transmission region such as a translucent member obliquely downward from above the second light source, and in the transmission region, white light distribution pattern forming light with higher luminance is emitted. Crosses the luminous flux. Even if irregular reflection occurs on the front cover by a laser beam of red or the like, the irregularly reflected light of red or the like is erased by white light and is not visually recognized from the front.

  A fifth aspect of the present invention is the vehicle lamp according to any one of the first to fourth aspects, wherein the light shielding member is an extension reflector, and the emission end is disposed behind the extension reflector. .

  (Operation) Since the emission end that emits the laser light is concealed behind the sextension reflector, the emission end is not visible from the front even if it emits red light or the like.

  A sixth aspect of the present invention provides the vehicular lamp according to any one of the first to fifth aspects, wherein the color of the laser light is red.

  (Operation) The emission end that emits red laser light for forming a mark or the like indicating a warning is concealed behind the light shielding member, and the emission end is not visible from the front even if it emits red light.

  According to the vehicular lamp of the first aspect, a driver or a pedestrian of an oncoming vehicle who sees the vehicular lamp from the front cannot visually recognize the emission end that emits red light or the like on the vehicular lamp. It cannot be recognized that the headlight is composed of other laser light.

  According to the vehicular lamp of the second aspect, the driver or the pedestrian of the oncoming vehicle who has seen the vehicular lamp from the front cannot see the irregularly reflected light such as red other than white on the translucent member. It cannot be recognized that the headlight is composed of laser light other than white.

  According to the vehicular lamp of the third aspect, the driver of the oncoming vehicle or the pedestrian who looks at the vehicular lamp from the front cannot see the irregularly reflected light such as red other than white on the front cover. It cannot be recognized that the headlight is composed of other laser light.

  According to the vehicle lamp of the fourth aspect, since the person who has seen the vehicle lamp from the front cannot see the irregularly reflected light other than white on the front cover or the like, the headlamp is configured by laser light other than white. It cannot be recognized as being.

  According to the vehicular lamp of the fifth aspect, the driver or the pedestrian of the oncoming vehicle who sees the vehicular lamp from the front cannot see the emission part behind the sextension reflector, so other than white such as red It cannot be recognized that the headlight is composed of laser light.

  According to the vehicular lamp of the sixth aspect, since the driver or the pedestrian of the oncoming vehicle who sees the vehicular lamp from the front cannot see the emission part emitting red light, the headlamp is configured by the red laser beam. It cannot be recognized that it is done.

The front view of the vehicle lamp of 1st Example. II sectional drawing of FIG. (A) The enlarged view of the laser light source unit of FIG. (B) The perspective view which looked at the light distribution part of FIG. 2 from the vehicle front. The vertical sectional view which cut | disconnected the vehicle lamp of 2nd Example in the same position as FIG. The block diagram explaining a control apparatus. Explanatory drawing regarding the drawing by the laser beam ahead of a vehicle. (A) Explanatory drawing which carried out the road surface drawing of the figure which recognizes the distance between vehicles with a preceding vehicle with a laser beam. (B) The figure which shows the modification of the mark of Fig.7 (a). (A) Explanatory drawing which drawn the road surface with the laser beam the figure which notifies the lane change to the succeeding vehicle of an adjacent lane. (B) Explanatory drawing which carried out the road surface drawing of the mark etc. which notify the vehicle width of the own vehicle with a laser beam. (A) Explanatory drawing which carried out the road surface drawing of the warning mark etc. regarding the presence of the vehicle of the oncoming lane, a pedestrian, etc. in an intersection with a laser beam. (B) Explanatory drawing which carried out the road surface drawing of the warning mark etc. with respect to the two-wheeled vehicle which is going to slip through from the vehicle left rear in an intersection with a laser beam. Explanatory drawing which carried out the road surface drawing with the laser beam for the mark etc. for alerting a driver to deceleration or deceleration of the own vehicle. Explanatory drawing which drawn the grid-like grid diagram on the road surface etc. with the laser beam in combination with the low beam light distribution pattern. The front view of the vehicle lamp of 3rd Example which has DRL. Explanatory drawing of 4th Example regarding the AO element provided instead of a MEMS mirror as an optical element.

Hereinafter, embodiments of the present invention will be described with reference to first to fourth examples shown in FIGS. 1 to 4 show a first embodiment of a vehicular lamp according to the present invention that emits laser light forward via an optical mechanism 8, and FIG. 5 emits laser light directly forward from a laser light source unit. 2 shows a second embodiment of a vehicular lamp.
6 to 11 show a drawing mode by laser light performed by the vehicle lamps of the first and second embodiments, FIG. 12 shows a third embodiment of the vehicle lamp having a DRL, and FIG. The 4th Example of the vehicle lamp which used the AO element as the optical mechanism is shown. In each figure, the directions of the vehicle and the vehicular lamp assumed to be viewed from the driver's seat by the driver (upper: lower: left: right: front: rear = Up: Lo: Le: Ri: Fr: Re).

  A vehicle lamp 1 of the first embodiment shown in FIGS. 1 and 2 shows an example of a right headlamp, a lamp body 2 having an opening on the front side of the vehicle, and a translucent resin. And a front cover 3 attached to the opening of the lamp body 2 which is a translucent member formed of glass or the like. Inside the lamp chamber S formed inside the lamp body 2 and the front cover 3, a plate-like support member 4 and a pair of LED light source units (5, 6) as a second light source for forming a light distribution pattern are provided. ), A laser light source unit 7 that is a light source that emits a plurality of laser beams and can change the color of the irradiation light, a MEMS mirror, and the like, and scans and irradiates the reflected laser light B2 from the laser light source unit 7 An optical mechanism 8 that draws a figure such as a line or a figure first, a control device 9 that controls emission and scanning of laser light, and an extension reflector 34 that is a light shielding member are accommodated.

  The LED unit (5, 6), which will be described in detail later, emits a light beam B1 of the white light distribution pattern forming light shown in FIG. 2 forward from the transmission region 3a of the front cover 3, thereby distributing the headlamp. A light pattern is formed. The light distribution pattern forming light may be yellow in consideration of a conventional fog lamp or the like. The optical mechanism 8 shown in FIGS. 2 and 3B is a MEMS mirror, and forwards the laser beam B2 such as red by the laser light source unit 7 forward at the reflection point (light emission end 32a) of the reflection unit 32. The reflection part 32 is swung up and down and left and right while reflecting, thereby drawing a warning mark for the driver on the road surface in front of the vehicle.

  Here, as shown in FIG. 2, a straight line horizontally extending forward from the light emitting end 32a of the optical mechanism 8 is denoted by reference numeral L11, and a straight line extending upward from the emitting end 32a is denoted by reference numeral L12. A region surrounded by L12 is represented by a symbol Ar1. The extension reflector 34 is shielded from at least a position above the emission end 32a (position on the straight line L12) to a front horizontal position (position on the straight line L1), that is, surrounded by at least the straight lines L11 and L12. It arrange | positions ahead of the output end 32a so that area | region Ar1 may be covered. As shown in FIG. 2, the upper edge 34b of the opening 34a of the extension reflector 34 may be disposed below the straight line L11, and the rear end 34d may be disposed behind the straight line L12.

  Laser light makes a person who looks directly feel a very strong glare. Further, in consideration of the law that the light distribution pattern of the headlamp must be formed only by white light, the emission end 32a that emits laser light other than white is not visible from the front of the vehicle. It is desirable to do. As shown in FIG. 2, the exit end 32a in this embodiment is concealed from the horizontal direction to the upper side by the front extension reflector 34, so that a pedestrian in front of the vehicle, a driver of an oncoming vehicle, etc. The emission end 32a cannot be seen from above.

  Further, the vehicular lamp that forms the headlamp is generally easily disposed at a position lower than the human eye (for example, 1 m or less), and the laser beam B2 reflected forward by the emission end 32a is generated from the horizontal direction. Since light traveling diagonally upward can be emitted only obliquely downward by being cut by the upper edge 34b of the extension reflector 34, pedestrians in front of the vehicle and drivers of oncoming vehicles reflect laser light other than white. It cannot be recognized that the emission end 32a forms the light source of the headlamp.

  As shown in FIG. 2, in the vehicular lamp 1, the reflecting portion 32 of the optical mechanism 8 is arranged so that the laser beam B <b> 2 reflected by the emission end 32 a is incident on the transmission region 3 a of the front cover 3. Is more desirable. As a result, the laser beam B2 reflected by the emission end 32a intersects the light beam B1 of the white light distribution pattern forming light in the transmission region 3a. Usually, when a laser beam such as red is irradiated on dirt or the like attached to the front cover, the translucent member such as the front cover 3 may appear to emit light in red or the like due to irregular reflection generated at the site where the dirt is attached. . However, since the laser beam B2 of red or the like in the vehicular lamp 1 according to the first embodiment intersects the luminous flux B1 of the white light distribution pattern forming light having a higher luminance at the transmission region 3a, red or the like generated in the front cover The irregularly reflected light is extinguished by white light and is not visible from the front. As a result, the driver of the oncoming vehicle cannot recognize that the headlamp is composed of laser light other than white such as red.

  Next, the LED light source unit (5, 6), the laser light source unit 7, and the optical mechanism 8 will be described in detail with reference to FIGS.

  The LED light source unit (5, 6) that generates the light distribution pattern forming light includes a metal bracket 10 fixed to the support member 4, an LED light emitting element 11, a reflector 12, and a transparent or translucent member respectively attached to the bracket 10. The LED light source unit 5 forms a high beam light distribution pattern, and the LED light source unit 6 forms a low beam light distribution pattern. The luminous flux B1 of the light distribution pattern forming light emitted from the LED light emitting element 11 is reflected forward by the reflecting surface 12a of the reflector 12, passes through the projection lens 13 and the transmission region 3a of the front cover 3, and is emitted forward of the vehicle. .

  The laser light source unit 7 and the optical mechanism 8 shown in FIGS. 1 and 2 are attached to a support member 4, and the support member 4 is attached to the lamp body 2 by a plurality of (three in this embodiment) aiming screws 14. . The control device 9 is fixed to the lamp body 2. The vehicular lamp 1 is adjusted in the horizontal direction and the vertical direction by rotating each aiming screw 14.

  The laser light source unit 7 shown in FIG. 3A includes a first light source 15 that generates red light (see symbol R), a second light source 16 that generates green light (see symbol G), and blue light (reference symbol). B)), a heat radiating member 18 formed of a metal such as aluminum having high thermal conductivity, first to third condenser lenses (20 to 22), and a condenser part 24. The heat radiating member 18 is attached to the metal support member 4, and the laser light source unit 7 is fixed to the front surface of the support member 4 by the heat radiating member 18.

  The first to third light sources (15 to 17) shown in FIG. 3A generate red, green, and blue laser beams, respectively. The first to third light sources (15 to 17) are respectively composed of red, green, and blue laser diodes (15a, 16a, and 17a) and substrates (15b, 16b, and 17b) that are semiconductor laser elements. To 17b) are attached to the heat dissipation member 18, respectively.

  The light source of the laser light source unit 7 is not limited to a configuration having three RGB light sources, but is a single-color light source, or four light sources in which an orange laser diode is added to three RGB light sources. You may enable it to generate white light by providing the structure which passes the emitted light of a diode through a yellow fluorescent substance. Each light source may be constituted by a laser device other than the laser diode.

  Each of the first to third condenser lenses (20 to 22) shown in FIG. 3A is configured by a collimator lens or the like. The condensing unit 24 includes first to third dichroic mirrors (25 to 27).

  As shown in FIGS. 2 and 3A, the red laser light R emitted from the first light source 15 is converted into parallel light by passing through the first condenser lens 20, and then is converted by the first dichroic mirror 25. The light is directly reflected toward a reflection part 32 (to be described later) of the optical mechanism 8. The green laser light G emitted from the second light source 16 is transmitted through the second condenser lens 21, converted into parallel light, reflected by the second dichroic mirror 26, and transmitted through the first dichroic mirror 25. The light enters the reflecting portion 32 of the optical mechanism 8. The blue laser light B emitted from the third light source 17 passes through the third condenser lens 22 and is converted into parallel light, and then is reflected by the third dichroic mirror 27, and the second and first dichroic mirrors (26, 26). 25) are sequentially transmitted, and then enter the reflecting portion 32 of the optical mechanism 8 as shown in FIG.

  The red laser beam R, the green laser beam G, and the blue laser beam B reflected by the condensing unit 24 become a laser beam B2 composed of a composite color, and is reflected on the reflecting unit 32 of the optical mechanism 8 as shown in FIG. It emits toward.

  The extension reflector 34 in the lamp chamber S has an opening 34a, and each projection lens 13 of the LED light source unit (5, 6) is exposed forward from the opening 34a. The laser light source unit 7 and the optical mechanism 8 are disposed on the LED light source unit 6 that forms a low beam light distribution pattern behind the extension reflector 34.

  The optical mechanism 8 shown in FIG. 3B is a MEMS mirror, and includes a base portion 37, a first rotating body 38, a second rotating body 39, a first torsion bar 40, a second torsion bar 41, a permanent magnet 42, 43 and a terminal portion 44. The plate-like base portion 37 and the first rotating body 38 each have an opening (37a, 38a) at the center, and the front surface of the plate-like second rotating body 39 is reflected by a process such as silver deposition or plating. Part 32 is formed. The optical mechanism 8 can employ various optical mechanisms such as a galvanometer mirror in addition to the MEMS mirror.

  The first rotating body 38 is supported by the pair of first torsion bars 40 provided at the upper and lower ends (37b, 37c) of the opening portion 37a so as to be rotatable left and right with respect to the base portion 37. The moving body 39 is supported by the pair of second torsion bars 41 provided at the left and right ends (38b, 38c) of the opening 38a so as to be vertically rotatable with respect to the first rotating body. As shown in FIG. 2, the base portion 37 and the first and second rotating bodies (38, 39) are inclined downward with respect to the longitudinal direction of the vehicular lamp, and the fixing portion 33 of the support member 4 shown in FIG. Fixed to.

  As shown in FIG. 3B, the base portion 37 is provided with a pair of permanent magnets 42 at a position orthogonal to the direction in which the first torsion bar 40 extends, and further orthogonal to the direction in which the second torsion bar 41 extends. A pair of permanent magnets 43 are provided at the positions to be operated. The first and second rotating bodies (38, 39) are provided with first and second coils (not shown) connected to the control device 9, respectively.

  The first coil and permanent magnet 42 and the second coil and permanent magnet 43 constitute a scanning actuator 35 shown in FIG. The scanning actuator 35 rotates the first rotating body 38 up and down with respect to the base portion 37 by individually changing the magnitude and direction of the drive current flowing in the first and second coils, and the second rotation. The moving body 39 is rotated left and right with respect to the first rotating body 38. The direction of the reflecting portion 32 changes vertically and horizontally based on the rotation of the first and second rotating bodies (38, 39).

  The optical mechanism 8 shown in FIGS. 2 and 3 (b) reflects the laser beam B2 emitted from the laser light source unit 7 in FIG. The laser beam B2 reflected forward at the emission end 32a (reflection point) of the reflecting part 32 scans the front of the vehicle by reciprocating the reflecting part 32 of the second rotating body 39 vertically and horizontally.

  A low beam distribution pattern forming light beam B1 emitted from the projection lens 13 of the LED light source unit 6 shown in FIG. 2 is emitted forward from the transmission region 3a of the front cover 3 in front. On the other hand, the emitted light B2 from the laser light source unit 7 is reflected obliquely downward by the reflecting portion 32 of the optical mechanism 8, and the upper end edge 34b of the opening 34a and the LED light source unit (5) from the light emitting end 32a that is the reflection point. , 6), and then passes forward through the front cover 3 after passing through a gap 34c formed between them. In the optical mechanism 8, as shown in FIG. 2, it is desirable to dispose the reflection portion 32 so that the reflected light B <b> 2 is incident on the transmission region 3 a of the front cover 3. In that case, when the laser beam B2 passes through the transmission region 3a of the front cover 3 and intersects with the white light distribution pattern forming light B1 having high luminance, the irregular reflection caused by dirt on the front cover 3 is erased. .

  FIG. 4 shows a vehicular lamp 45 of the second embodiment. The vehicular lamp 45 of the second embodiment is obtained by replacing the laser light source unit 7 and the optical mechanism 8 of the vehicular lamp 1 of the first embodiment with a laser light source unit 46, and other configurations are the same as in the first embodiment. This is the same as the vehicular lamp 1. The laser light source unit 46 emits the laser beam B21 directly to the front cover 3 without using the optical mechanism 8 as in the first embodiment.

  The laser light source unit 46 shown in FIG. 4 includes a laser diode 46 a, a substrate 46 b, and a heat sink 46 c on which the substrate 46 b is mounted, and is attached to the support member 4 by a link mechanism 47. The link mechanism 47 includes a first link 47a fixed forward from the support member 4 and a second link 47b attached so as to be rotatable around a horizontal rotation axis L13 of the first link 47a. The laser light source unit 46 is attached to the second link 47b. The support member 4 is provided with an actuator mechanism 48 for moving the arm 48a forward and backward, and the second link 47b is connected to the tip of the arm 48a of the actuator mechanism 48 via an elastic member 47c such as rubber. The laser light source unit 46 and the second link 47b swing around the horizontal rotation axis L13 based on the advance / retreat operation of the arm 48a.

  When the second link 47b shown in FIG. 4 rotates clockwise about the horizontal rotation axis L13 by the advance of the arm 48a of the actuator mechanism 48, the direction of the laser beam B21 emitted from the laser light source unit 46 is upward. Change. Further, when the second link 47b rotates counterclockwise D2 by the retraction of the arm 48a, the direction of the laser beam B21 changes downward. On the other hand, the laser light source unit 46 is attached to the second link 47b so as to be rotatable around the central axis L14 of the second link 47b, and swings around the central axis L14 by a motor (not shown). The direction of the laser beam B21 is changed left and right by a motor (not shown).

  The vehicular lamp 45 of the second embodiment draws a figure on the road surface or the like in front of the vehicle by scanning the direction of the laser beam B21 back and forth and right and left through the front cover 3 with an actuator mechanism 48 and a motor (not shown). The light emission operation of the laser light source unit 46, the advance / retreat operation of the arm 48a of the actuator mechanism 48, and the rotation operation of the laser light source unit 46 by a motor (not shown) are all controlled by the connected control device 9. The actuator mechanism 48 and a motor (not shown) constitute the investigation actuator 49 in FIG.

  The light emitting end 46d of the laser diode 46a is at least a horizontal position (a position on the straight line L16 extending vertically upward from the emitting end) in the same manner as the emitting end 32a of the first embodiment shown in FIG. The position of the laser light source unit 46 is drawn obliquely downward toward the front cover 3 through the gap 34c of the opening 34a through the gap 34c of the opening 34a. A laser beam is emitted. As a result, a pedestrian or the like in front of the vehicle cannot visually recognize the exit end. The laser light source unit 46 is preferably directed to the transmission region 3a of the front cover 3 through which the light beam B1 of the LED light source unit 6 passes. In that case, the laser light B21 emitted from the laser light source unit 46 intersects with the white light distribution pattern forming light B1 having higher luminance, thereby eliminating the irregular reflection caused by the dirt on the front cover 3 or the like.

  The control device 9 shown in FIG. 5 includes a lamp ECU (electronic control device) 51, a ROM 52, a RAM 53, and the like. The lamp ECU 51 includes an actuator control unit 36 and a laser light source control unit 54. Various control programs are recorded in the ROM 52, and the lamp ECU 51 executes the control program recorded in the ROM 52 in the RAM 53, and generates various control signals.

  The laser light source control unit 54 determines the color of the laser light from the first to third light sources (15 to 17), the emission intensity and the lighting on / off of the first to third light sources (15 to 17) and the laser light source unit 46 for each light source. Control. The actuator control unit 36 controls the scanning actuators (35, 49) to scan the front of the vehicle with the laser beam B2, and displays graphics such as marks and characters for alerting the driver, pedestrians, etc. on the road surface around the vehicle. And draw on buildings.

  Also connected to the ECU 51 are an image processing device 55, a raindrop sensor 56, a navigation system 57, a speedometer 58, a road information communication system 59, a turn signal lamp switch 64, a steering operation detection mechanism 65, an accelerator opening detection mechanism 71, and the like. Is done. The image processing device 55 is connected to an in-vehicle camera 60, a road monitoring camera 61, and the like. The image processing device 55 sends to the lamp ECU 51 as data obtained by analyzing and processing the video or the like related to the road or building taken by the on-vehicle camera 60 or the road monitoring camera 61 such as an intersection camera connected via a communication line. The system 57 sends a data signal related to the current position of the host vehicle to the lamp ECU 51.

  The lamp ECU 51 includes the video data of the image processing device 55, the situation of the host vehicle on the road obtained from the navigation system 57, the road surface situation such as wet and freezing obtained from the data of the raindrop sensor 56 and the road information communication system 59, etc. Analyzing the driver's investigation by the driver obtained from the turn signal lamp switch 64, the steering motion detection mechanism 65, and the accelerator opening detection mechanism 71, and then displaying a predetermined figure for alerting the driver of the host vehicle or another vehicle on the road surface, etc. The laser light source unit 7 and the optical mechanism 8 are controlled so as to draw at a predetermined position.

  Drawing of a figure is performed as shown in FIG. 6, for example. The optical mechanism 8 of the first embodiment and the laser light source unit 46 of the second embodiment move downward in the rectangular area (reference numeral Sc1) in front of the vehicle by changing the direction of the laser beam (B2, B21) vertically and horizontally. Repeatedly scans left and right while shifting by a minute length. Reference numeral S <b> 1 indicates a miracle of the scanning line by the optical mechanism 8 and the laser light source unit 46, the broken line portion of the scanning line S <b> 1 indicates extinction, and the solid line portion indicates lighting. Laser light (B2, B21) draws figures such as characters and marks by stacking up and down miracle in the left and right direction at the time of lighting. Listed below are predetermined figures drawn to alert the driver of the host vehicle or other vehicles using the vehicular lamps (1, 45) of the first and second embodiments.

  In FIG. 6, red laser light is emitted along the lane mark M1 (portion indicated by a two-dot chain line) on the road surface R1 that is illuminated by the white low beam light distribution pattern Lb and whose position is specified by the in-vehicle camera 60 or the like. A line L1 is drawn. The driver recognizes the position of the lane mark by visually recognizing the line L1. In particular, when a line by a laser beam is drawn along a lane mark on a curved road, the driver can visually recognize the curved direction of the road in advance, thereby avoiding a deviation from the lane.

  When the low beam light distribution pattern Lb is formed as a combined light distribution pattern using white laser light scanned by the LED light source unit 6, the laser light source unit 7 and the optical mechanism 8, a line L1 formed inside the white light distribution pattern. It is desirable to form a dark portion around other marks by reducing the white laser light (including extinguishing) in order to make the lines L1 and marks stand out.

  7 (a) and 7 (b), the stopable distance is automatically calculated from the traveling speed of the host vehicle and the road surface condition by the drawing system of the vehicular lamp (1, 45). The figure which showed the mark etc. which were shown on the road surface with a laser beam is shown.

  In this case, the lamp ECU 51 calculates the braking speed according to the own vehicle speed obtained by the speedometer 58, the raindrop sensor 56, the road information communication system 59, etc., the amount of rainfall on the running road surface, and the presence or absence of freezing. A plurality of marks indicating the positions where the host vehicle can stop are drawn on the road surface according to the degree of depression. For example, the own vehicle My traveling at 60km / h on rainy roads can be stopped at a distance of 90m by a gentle brake operation, 70m by a strong normal brake operation, and 70m by a full brake operation. When calculated, the vehicular lamp (1,45) has a rectangular green first mark 62a in the range of 70m to 90m in front of the vehicle and a rectangular yellow second mark 62b in the range of 50m to 70m. A rectangular red third mark 62c and the like are drawn in front of the host vehicle My. The driver of the host vehicle My sees that the other vehicle Ot traveling ahead in the same lane R2 has entered any one of the first to third marks of different colors, so that there is a risk of a rear-end collision. This is specifically recognized, and an appropriate inter-vehicle distance for avoiding a rear-end collision is to be taken between the other vehicle Ot. If the first to third marks indicate that the risk of rear-end collision has increased, the marks are not different in color and have different shapes such as ◯, Δ, and X (63a in FIG. 7B). To 63c).

  FIG. 8A is a diagram in which a mark or the like for informing a driver of a succeeding vehicle in an adjacent lane of a lane change of the own vehicle is drawn on the road surface with a laser light by the vehicular lamp (1, 45). In the vehicle lamp (1, 45), the lane change direction of the host vehicle detected by the turn signal lamp switch 64 and the steering operation detection mechanism 65 is detected, and based on the detection result, from the travel lane R11 of the host vehicle My. The first to third arrow marks (66 to 68) indicating the lane change are drawn over the adjacent lane R12 where the lane change is performed. The driver of the other vehicle Otr can avoid a contact accident by visually checking the first to third arrow marks (66 to 68) forward even if the turn signal lamp of the host vehicle My is not visible.

  In FIG. 8B, a mark or the like that informs the vehicle width of the host vehicle is drawn on the road surface in front of the host vehicle with a laser beam. The vehicle lamps (1, 45) form lines (L3, L4) by laser light in front of the host vehicle My along the left and right side ends (My1, MY2) of the vehicle. As shown in FIG. 9B, the driver operates the steering so that the drawn lines (L3, L4) do not come in contact with the obstacle Ms in front of the host vehicle My. Can be avoided.

  Next, FIGS. 9A and 9B are diagrams in which warning marks and the like regarding traffic of vehicles, pedestrians, and the like in the vicinity of intersections are drawn on the road surface with laser light.

  In the vehicular lamp (1, 45), the current location and speed of the oncoming vehicle, the position of the pedestrian Hu and the bicycle (not shown) on the pedestrian crossing are determined from the video information of the in-vehicle camera 60 and the road monitoring camera 61. The lamp ECU 51 calculates. Further, the lamp ECU 51 detects from the turn signal lamp switch 64 and the steering operation detection mechanism 65 whether the vehicle is turning left or right.

  For example, as shown in FIG. 9A, when it is detected that an oncoming vehicle Ots is approaching the oncoming lane R13 or a pedestrian Hu is on the pedestrian crossing when turning right, the vehicular lamp (1, 45) is Then, by drawing a mark made of a framed letter “STOP” or the like on the road surface R3 in the traveling direction with a laser beam such as red, the driver of the host vehicle My and the oncoming vehicle Ots recognizes the risk of turning right. Also, as shown in FIG. 9 (b), when a motorcycle Bk that tries to pass through the left side of the host vehicle My from the rear is detected, the vehicular lamp (1, 45) is placed on the road surface R3 in the traveling direction on the arrow. By drawing a stop line Sst with a laser beam such as red on the left turn mark ML and on the road surface behind the host vehicle My, the rider of the motorcycle Bk recognizes the danger of getting involved in a left turn. In addition, by drawing a mark made of a framed letter such as “BIKE!” Indicating the presence of the motorcycle Bk on the road surface in the traveling direction of the own vehicle MY with a laser beam such as red, the motorcycle Bk is also given to the driver of the own vehicle. Recognize the danger of getting involved in a left turn.

  FIG. 10 is a diagram in which a mark or the like is drawn on the road surface with a laser beam to prevent the driver from excessively speeding the vehicle or to increase the speed in order to eliminate traffic congestion.

  A plurality of marks M51 shown in FIG. 10 are a plurality of rectangular marks drawn intermittently in the front-rear direction of the road surface by a laser beam such as red, and the plurality of marks M52 are positioned by the vehicle-mounted camera 60 or the like. A plurality of rectangular marks drawn intermittently in the front-rear direction with respect to the specified guard rail GL.

  The driver senses the traveling speed of the host vehicle by visually recognizing a structure on the road such as the guard rail GL that moves backward with respect to the host vehicle at the traveling speed of the host vehicle My. The vehicular lamp (1,45) moves in the traveling direction or the reverse direction of the host vehicle at a speed faster or slower than the speed of the host vehicle My traveling on the marks (M51, M52) drawn on the road surface R4 and the guard rail GL. Move. When the mark (M51, M52) is moved in the reverse direction, the driver is urged to decelerate the host vehicle My by feeling the traveling speed of the host vehicle My faster as the moving speed of the mark M51 rearward is increased. The slower the moving speed of the marks (M51, M52) is, the slower the traveling speed of the host vehicle My is felt to increase the speed of the host vehicle My.

  Note that the structure on the road appears shorter in the traveling direction from the traveling driver as the speed of the host vehicle My increases. Therefore, when the vehicular lamp (1, 45) draws the front and rear length L51 of the mark M51 shorter, the drawing driver feels that the traveling speed of the host vehicle My is faster and is prompted to decelerate, and the front and rear length L51 is longer. As the drawing is performed, the driver feels that the traveling speed of the host vehicle My is slower and is prompted to decelerate.

  FIG. 11 shows a diagram in which a grid-like grid diagram is drawn around the vehicle by laser light such as red. The vehicle lamp (1, 45) irradiates the grid diagram PG on the road surface R5, the road surface side groove C1, the depression hole C2, the fallen object C3, and the like in front of the vehicle with a laser beam of red or the like inside and outside the low beam distribution pattern PL. In this case, the grid diagram PG is curved or cut based on the unevenness of the irradiated place, thereby making the shapes of the side grooves C1 and the like stand out and make it easier for the driver to grasp the shape and position.

  FIG. 12 shows a third embodiment of the vehicular lamp. The vehicle lamp 73 of FIG. 12 includes two LED light source units for forming a high beam and a low beam that are tiltably attached to the inside of the lamp body 74 via a lamp body 74, a front lens 75, an aiming screw 78, and a support member 79. (76, 77), a DRL unit 80 having a plurality of LED light emitting elements 81, a laser light source unit (not shown), and an optical mechanism 82 having a reflecting portion 83 that can be tilted vertically and horizontally. An emission end 84 (reflection point) of the reflection unit 83 that reflects the laser light is exposed forward from the plurality of LED light emitting elements 81. Even if the laser beam other than white is reflected, the emission end 84 is not visually recognized by a pedestrian in front or a driver of an oncoming vehicle because the emission color is erased by the plurality of LED light emitting elements 81 having high luminance.

  FIG. 13 is an explanatory diagram of a fourth embodiment relating to an AO element used in place of the MEMS mirror used in the vehicular lamp 1 of the first embodiment. An AO element (Acousto-Optic-Device) periodically changes its refractive index when loaded with a high-frequency electrical signal. The laser beam that has passed through the AO element to which the high-frequency electrical signal has been applied is scanned linearly. In this embodiment, as shown in FIG. 14, two AO elements (90, 91) respectively connected to high-frequency electric signal applying means (92, 93) are arranged in series. The laser light that has passed through the AO element 90 is scanned in a straight line by being periodically refracted, and the laser light that has been linearized is refracted again by the AO element 91 to make a wider range linear. Scanned.

  Next to the AO element (90.91), another set of the same AO elements (90, 91) (not shown) is connected in series in a state rotated by 90 degrees with respect to the straight line L6 indicating the incident line direction of light. It is desirable to arrange (another set of AO elements is not shown). As a result, for example, the laser beam B2 incident on the first set of AO elements (90, 91) and scanned on the line in the vertical direction is rotated by 90 degrees and the second set of AO elements (not shown). The laser beam is scanned in a plane shape. Since the AO element is hardly affected by the vibration of the vehicle, the road surface can be drawn with little distortion.

DESCRIPTION OF SYMBOLS 1,45 Vehicle lamp 2 Lamp body 3 Front cover 3a Transmission area of front cover 5,6 LED light source unit as second light source 7, 46 Laser light source unit 34 Extension reflector as light shielding member B1 Formation of white light distribution pattern Light B2, B21 Laser beam L11, L15 Straight line indicating the horizontal position in front of the emitting end L12, L16 Straight line showing above the emitting end

Claims (6)

A laser light source capable of emitting laser light;
In the vehicular lamp that emits laser light generated by the laser light source forward from the emission end,
A vehicular lamp, comprising a light shielding member that shields light from above the emission end to at least a horizontal position in front of the emission end. A second light source for generating white or yellow light distribution pattern forming light;
A light transmissive member that transmits the light distribution pattern forming light,
2. The vehicular lamp according to claim 1, wherein the emission end is arranged to emit the laser beam obliquely downward toward a transmission region of light distribution pattern forming light in the light transmissive member. . A lamp body having an opening in the front and housing the light source and the emission end on the inside;
The vehicular lamp according to claim 2, further comprising a front cover that is the translucent member attached to the lamp body so as to close the opening.   The vehicular lamp according to claim 2 or 3, wherein the emission end is disposed above the second light source. The light shielding member is an extension reflector,
The vehicular lamp according to any one of claims 1 to 4, wherein the emission end is disposed behind an extension reflector.   The vehicular lamp according to any one of claims 1 to 5, wherein the laser beam has a red color.

Images