JP2018014256A - Vehicular lighting fixture and driving method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture capable of forming a light distribution pattern which is wide and in which luminous intensity in the central part is high, and a driving method of the same.SOLUTION: A vehicular lighting fixture 2 includes a projection lens 3, a lens holder 4, a body cylinder 5, a bottom lid 6, first-third excitation light sources 11-13, an upper optical deflector 15, a lower optical deflector 16, a correction mirror 17 and a fluorescent body 18. The laser light radiated from the first excitation light source 11 is scanned in a first scan range SR1 substantially at the center of a virtual vertical screen S via the upper optical deflector 15, the correction mirror 17, the fluorescent body 18 and the projection lens 3. The laser light radiated from the second excitation light source 12 is scanned in a second scan range SR2 on the left side of the virtual vertical screen S via the lower optical deflector 16, the correction mirror 17, the fluorescent body 18 and the projection lens 3. The laser light radiated from the third excitation light source 13 is scanned in a third scan range SR3 on the right side of the virtual vertical screen S via the lower optical deflector 16, the correction mirror 17, the fluorescent body 18 and the projection lens 3.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a vehicular lamp including an optical deflector that scans a light beam and a driving method thereof.

  As a vehicle lamp mounted on a vehicle, light from a light source such as a laser is scanned by an optical deflector such as MEMS (Micro Electro Mechanical Systems) to draw a two-dimensional image on a fluorescent screen, and this two-dimensional image is arranged. There is one that projects forward as an optical pattern (see Patent Document 1).

  The vehicle headlamp described in Patent Document 1 includes two light sources and two optical deflectors, and scans the light from the first light source with the first optical deflector, and the second light source. The light distribution pattern is changed by scanning the light beam from the first light deflector with the second light deflector and controlling the tilt angle and tilt direction of the light deflection mirror of each light deflector.

Japanese Patent No. 5577138

  However, in the vehicle headlamp described in Patent Document 1, the range in which the light beam is irradiated by the scanning of each deflector is the same, and a light distribution pattern wider than that range cannot be formed. Moreover, in the light distribution pattern for high beams and the like, it is necessary to make the light intensity at the center portion the highest, but with the vehicle headlamp described in Patent Document 1, the light intensity at the center portion of the light distribution pattern cannot be increased. .

  An object of the present invention is to provide a vehicular lamp that can form a light distribution pattern that is wide and has a high luminous intensity at the center, and a driving method thereof.

  The vehicular lamp of the present invention is a vehicular lamp that forms a predetermined light distribution pattern, and at least three or more light sources that irradiate light and light beams emitted from at least one or more of the light sources are incident thereon. A first light deflection mirror that reflects the light beam, a first light deflector that scans the light beam by changing a reflection direction of the light beam by the first light deflection mirror, and a plurality of the light deflectors A second light deflection mirror that is arranged so that a plurality of light beams emitted from a light source are incident thereon and reflects the plurality of light beams, and a direction in which the plurality of light beams are reflected by the second light deflection mirror is changed. A second optical deflector that scans so that a center position of a scanning range of the plurality of light beams is separated from each other, and the predetermined light distribution by the plurality of light beams scanned by the first optical deflector and the second optical deflector. light An optical system for forming a turn, characterized in that it comprises a.

  According to the present invention, since the second optical deflector scans so that the center positions of the scanning range by a plurality of light beams are separated from each other, it is possible to form a light distribution pattern wider than the scanning range by one light beam. it can. Further, by forming the light scanned by the first light deflector at the center of the light distribution pattern, a light distribution pattern having a high luminous intensity at the center can be formed.

  In the present invention, when the light beams irradiated from the plurality of light sources are incident on the first light deflection mirror, the plurality of light beams incident on the first light deflection mirror preferably have a single optical axis.

  According to this configuration, a plurality of light beams having a single optical axis can be scanned by the first optical deflector. Thereby, the luminous intensity of the scanning range by the first optical deflector can be made higher than that formed by one light beam.

  In the present invention, when the light beams emitted from the plurality of light sources are incident on the first light deflection mirror, the plurality of light beams are preferably incident on the first light deflection mirror in an overlapping state. .

  According to this configuration, since the plurality of light beams are incident on the first light deflection mirror in an overlapped state, the light beams are incident on the first light deflection mirror without being overlapped. Can irradiate beautiful light.

  In the present invention, when the scanning positions of a plurality of light beams irradiated from the plurality of light sources and scanned by the second light deflection mirror are left and right ends of a scanning range, the light beams are directed toward the second light deflection mirror. It is preferable to include control means for controlling the brightness of the plurality of light sources that irradiate the light to be lowered.

  According to this configuration, the rotation of the second light deflection mirror is temporarily stopped at the left and right end portions that are the folded portions of the scanning range, and the irradiation time of the light beam at the left and right end portions becomes longer than the other portions. Even in such a case, since the brightness of the light source is lowered when the scanning positions of a plurality of light beams become the left and right ends of the scanning range, it is possible to prevent the luminous intensity from increasing at the left and right ends of the scanning range.

  The vehicle lamp driving method according to the present invention includes at least three or more light sources that irradiate light, and a light beam emitted from at least one or more of the light sources is disposed so as to reflect the light rays. By changing the reflection direction of the light beam by the one light deflection mirror and the first light deflection mirror, the first light deflector that scans the light beam and a plurality of light beams emitted from the plurality of light sources are incident. A second light deflection mirror that reflects the plurality of light beams, and a center position of a scanning range by the plurality of light beams by changing a reflection direction of the plurality of light beams by the second light deflection mirror. A second optical deflector that scans so as to be separated from each other, and an optical system that forms a predetermined light distribution pattern by a plurality of light beams scanned by the first optical deflector and the second optical deflector The lamp driving method, wherein the plurality of light sources that irradiate light toward the second light deflection mirror are scanned by the plurality of light beams that are emitted from the plurality of light sources and scanned by the second light deflection mirror. When the position is at the left and right ends of the scanning range, it is driven so that the luminance of the irradiated light beam is lowered.

  According to the present invention, the plurality of light sources that irradiate the second light deflecting mirror with the light beam so that the brightness of the irradiated light beam is reduced when the scanning positions of the plurality of light beams are the left and right ends of the scanning range. Therefore, it is possible to prevent the luminous intensity from increasing at the left and right ends of the scanning range.

  In the present invention, center positions of a plurality of scanning ranges by a plurality of light beams irradiated from the plurality of light sources and scanned by the second light deflection mirror are set apart from each other in the left-right direction, and the plurality of scanning ranges are vertically moved. When the directions do not match, the plurality of light sources that irradiate the second light deflecting mirror with the light beams are scanned from the plurality of light beams that are irradiated from the plurality of light sources and scanned by the second light deflecting mirror. When the position is at the upper end or the lower end of the scanning range, it is preferably driven so as to be in an unirradiated state.

  According to this configuration, even when the plurality of scanning ranges by the second light deflection mirror do not coincide with each other in the vertical direction, the plurality of light sources has the scanning positions of the plurality of light beams scanned by the second light deflection mirror. Since the non-irradiation state is obtained when the upper end portion or the lower end portion of the light beam becomes, the light irradiation range in the plurality of scanning ranges by the second light deflection mirror can be matched in the vertical direction.

The perspective view which shows the vehicle lamp of this embodiment. Sectional drawing which shows a vehicle lamp. III-III sectional drawing in FIG. The block diagram which shows the structure of a vehicle lamp. The perspective view which shows an upper light deflector. The figure explaining operation | movement of the piezoelectric actuator which has a meander structure. Schematic which shows the scanning range in the virtual vertical screen S. FIG. Schematic which shows the light distribution pattern for elliptical high beams. Schematic which shows the scanning range of 2nd Embodiment, and the brightness | luminance at the time of scanning. Schematic which shows the drive state of the 2nd excitation light source at the time of the scanning of 2nd Embodiment. Schematic which shows the 2nd scanning range and 3rd scanning range of 3rd Embodiment. Schematic which shows the drive state of the 2nd excitation light source at the time of the scanning of 3rd Embodiment, and a 3rd excitation light source. The side view which shows the inside of the vehicle lamp of 4th Embodiment.

[First Embodiment]
As shown in FIG. 1, the vehicular lamp 2 includes a projection lens 3, a lens holder 4 that holds the projection lens 3, a main body cylinder 5 attached to the rear end of the lens holder 4, and a rear of the main body cylinder 5. And a bottom lid 6 for closing the opening on the side. In the present embodiment, the vehicular lamp 2 is used as a headlight of a vehicle, for example.

  As shown in FIG. 2, the vehicular lamp 2 is an upper light that scans the first to third excitation light sources 11 to 13 and the excitation light from the first excitation light source 11 two-dimensionally (horizontal and vertical directions). A deflector 15 and a lower light deflector 16 that two-dimensionally scans excitation light from the second and third excitation light sources 12 and 13 are provided. Hereinafter, the upper optical deflector 15 and the lower optical deflector 16 are collectively referred to as the upper and lower optical deflectors 15 and 16. The driving of the first to third excitation light sources 11 to 13 and the upper and lower light deflectors 15 and 16 is controlled by a control device 19 (see FIG. 4) described later in detail.

  Further, the vehicular lamp 2 has a predetermined light distribution pattern by a correction mirror 17 that corrects distortion (details will be described later) of the light scanned by the upper and lower light deflectors 15 and 16 and a light beam corrected by the correction mirror 17. And a phosphor 18 (projector) on which a corresponding two-dimensional image is drawn. The two-dimensional image drawn on the phosphor 18 is projected forward by the projection lens 3.

  Each of the excitation light sources 11 to 13, the upper and lower light deflectors 15 and 16, the correction mirror 17, and the phosphor 18 are disposed inside the main body cylinder 5 and fixed by a fixing member (not shown). In addition, you may provide the fin for heat radiation in the outer peripheral surface of the main body cylinder 5. FIG.

  For example, the first excitation light source 11 collects the light from the semiconductor light emitting element 11a and the semiconductor light emitting element 11a such as a laser diode (LD) that emits laser light in a blue region (for example, emission wavelength is 450 nm) as excitation light. And a condensing lens 11b for collimating light.

  As with the first excitation light source 11, each excitation light source 12 and 13 includes semiconductor light emitting elements 12a and 13a and condenser lenses 12b and 13b. Each of the semiconductor light emitting elements 11a to 13a may be a semiconductor light emitting element such as a laser diode that emits laser light in the near ultraviolet region (for example, the emission wavelength is 405 nm). Moreover, each semiconductor light emitting element 11a-13a may be LED. Further, a laser irradiator that irradiates laser beams mixed in RGB may be used.

  The first excitation light source 11 irradiates a laser beam toward the rotation center of the light deflection mirror 20 of the upper light deflector 15 described later in detail. The second excitation light source 12 and the third excitation light source 13 irradiate a laser beam toward the rotation center of the light deflection mirror 20 of the lower light deflector 16 described later in detail.

  A second excitation light source 12 and a third excitation light source 13 are arranged below the first excitation light source 11. Moreover, as shown in FIG. 3, the 2nd excitation light source 12 and the 3rd excitation light source 13 are arrange | positioned in the position away in the left-right direction of front view. This is because the light beams from the light sources 11 to 13 are scanned in different ranges, as will be described in detail later. The second excitation light source 12 and the third excitation light source 13 are different in the relative positional relationship with the lower light deflector 16 in the left-right direction, and the irradiation angle of the light beam and the reflected light angle are also different. Therefore, the scanning range differs between the second excitation light source 12 and the third excitation light source 13 in the left-right direction. In FIG. 2, the second excitation light source 12 and the third excitation light source 13 are arranged up and down for simplicity.

  As shown in FIG. 2, the light beams scanned by the upper and lower light deflectors 15 and 16 enter the correction mirror 17. The light beam scanned by the upper and lower light deflectors 15 and 16 is distorted due to the influence of the incident angle of the light beam on the light deflection mirror 20 and the rotation axis of the light deflection mirror 20.

  The correction mirror 17 corrects and reflects the distortion of the light beam scanned by the upper and lower light deflectors 15 and 16, and the reflection surface is curved. Note that the shape of the correction mirror 17 can be changed as appropriate, and the correction mirror 17 may be composed of a plurality of mirrors. When providing a some mirror, it is provided so that it may respond | correspond to each of the up-and-down light deflectors 15 and 16 or each of the scanning beam of the 1st-3rd excitation light sources 11-13.

  The phosphor 18 is scanned two-dimensionally by the upper light deflector 15 and the lower light deflector 16, receives the laser beam corrected by the correction mirror 17, and converts at least a part of the laser beam into light beams having different wavelengths. It is to be converted and is formed in a plate shape (or layer shape) having a rectangular outer shape. The phosphor 18 is disposed in the vicinity of the focal point of the projection lens 3. In FIG. 2, the thickness of the phosphor 18 is exaggerated.

  For example, when a laser diode (LD) that emits a blue laser beam is used as the semiconductor light emitting elements 11a to 13a of the respective excitation light sources 11 to 13, the phosphor 18 is excited by the blue laser beam and is yellow. Those that emit light are used. The phosphor 18 is scanned two-dimensionally by the upper light deflector 15 and the lower light deflector 16 and then two-dimensionally corresponding to a predetermined light distribution pattern by a laser beam in a blue region corrected by the correction mirror 17. The image is drawn as a white image. The two-dimensional image is drawn as a white image when the laser beam in the blue region is irradiated, the phosphor 18 emits light by the laser beam in the blue region that transmits (passes) the laser beam and the laser beam in the blue region. This is due to the emission of white light (pseudo white light) resulting from color mixing with (yellow light).

  On the other hand, when a laser diode (LD) that emits a near-ultraviolet laser beam is used as the semiconductor light emitting elements 11a to 13a, the phosphor 18 is excited by the near-ultraviolet laser beam to emit red, green, and blue. Those that emit light of three colors are used. The phosphor 18 is scanned two-dimensionally by the upper light deflector 15 and the lower light deflector 16 and then corrected by the correction mirror 17 so as to correspond to a predetermined light distribution pattern. A dimensional image is drawn as a white image. The two-dimensional image is drawn as a white image when the near-ultraviolet laser beam is irradiated, the phosphor 18 emits light by the near-ultraviolet laser beam (red, green, and blue light). ) To emit white light (pseudo white light). Note that a white light beam may be emitted by exciting a blue phosphor and a yellow phosphor with a near-ultraviolet laser beam.

  The projection lens 3 includes four lenses 3 a to 3 d, and each lens 3 a to 3 d is held by a lens holder 4. In each of the lenses 3a to 3d, the aberration (field curvature) is corrected so that the image surface is flat, and the chromatic aberration is corrected. In this case, the phosphor 18 has a flat plate shape and is arranged along the image plane (plane).

  The focal point of the projection lens 3 is located in the vicinity of the phosphor 18. The projection lens 3 can remove the influence of aberration on the predetermined light distribution pattern as compared with the case of using a single convex lens. In addition, since the phosphor 18 has a flat plate shape, the manufacture thereof becomes easier as compared with the case where the phosphor 18 has a curved surface shape. Furthermore, since the phosphor 18 has a flat plate shape, a two-dimensional image can be easily drawn as compared with the case where the phosphor 18 has a curved surface shape.

  The projection lens 3 may be configured as a projection lens made up of a single aspherical lens whose aberration (field curvature) is not corrected so that the image plane is flat. In this case, the phosphor 18 has a curved shape corresponding to the curvature of field, and is arranged along the curvature of field.

  The projection lens 3 projects a two-dimensional image drawn on the phosphor 18 forward, and is disposed at a position of a virtual vertical screen S (approximately 25 m ahead of the vehicle lamp 2) facing the vehicle lamp 2. ) As a predetermined light distribution pattern, for example, a high beam light distribution pattern HP is formed.

  The upper light deflector 15 scans the excitation light collected by the condenser lens 11b of the first excitation light source 11 in the horizontal direction and the vertical direction, and the lower light deflector 16 includes the second and third excitation light sources 12, The excitation light condensed by the 13 condenser lenses 12b and 13b is scanned in the horizontal and vertical directions.

  As shown in FIG. 4, the first to third excitation light sources 11 to 13, the upper light deflector 15, and the lower light deflector 16 are connected to a control device 19 that controls the vehicular lamp 2 in an integrated manner. The drive is controlled by the device 19.

  The vertical light deflectors 15 and 16 are, for example, MEMS scanners. The driving method of the optical polarizer is roughly classified into a piezoelectric method, an electrostatic method, and an electromagnetic method, and any method may be used. In the present embodiment, a piezoelectric optical polarizer will be described as a representative.

  As shown in FIG. 5, the upper optical deflector 15 is a biaxial optical deflector, which is manufactured using a semiconductor process or MEMS (Micro Electro Mechanical Systems) technology, and rotates incident light from a certain direction. The light is reflected by the light deflecting mirror 20 as a micromirror, and emitted as reflected light (laser light).

  The upper light deflector 15 includes a first support portion 21. The first support portion 21 includes an optical deflection mirror 20, semi-annular piezoelectric actuators 23a and 23b, torsion bars 24a and 24b, and the like. The laser beam from the first excitation light source 11 is reflected by the light deflection mirror 20, and the reflected beam (laser beam) scans on the virtual vertical screen S via the correction mirror 17, the phosphor 18 and the projection lens 3.

  At this time, the control device 19 transmits a control signal to the upper light deflector 15 and the first excitation light source 11. The semi-annular piezoelectric actuators 23a and 23b of the upper light deflector 15 are driven by the control signal, and the torsion bars 24a and 24b coupled to the semi-annular piezoelectric actuators 23a and 23b are twisted to rotate the light deflection mirror 20. Further, on and off of the laser beam and the luminance are controlled in each excitation light source 11 and 12 by the control signal.

  In the present embodiment, in the two-axis orthogonal coordinate system, a horizontal rotation axis passing through the center of the circular light deflection mirror 20 is defined as an X axis, and a vertical rotation axis is defined as a Y axis. In FIG. 5, the X-axis is the left-right direction, the Y-axis is the up-down direction, and the thickness direction of the light deflection mirror 20 is the front-rear direction.

  The upper light deflector 15 includes a rectangular annular second support portion 22, and the first support portion 21 is disposed at the center of the second support portion 22. Further, bellows-shaped piezoelectric actuators 31 a and 31 b are arranged symmetrically with respect to the Y axis passing through the center of the first support portion 21, and are coupled to the lower end of the side portion of the first support portion 21 and the second support portion 22. doing. In FIG. 4, the first and second support portions 21 and 22 and the piezoelectric actuators 31a and 31b are collectively referred to as MEMS.

  The piezoelectric actuators 31a and 31b are formed in a meander structure in which a plurality of cantilevers are arranged in the direction in which the longitudinal directions are adjacent to each other and folded at the end portions in the vertical direction and coupled in series. Although details will be described later, by driving the piezoelectric actuators 31a and 31b by the control signal, the first support portion 21 reciprocally rotates in the horizontal direction, that is, around the X axis passing through the center of the light deflection mirror 20 in the drawing. To do.

  Further, as described above, by driving the semi-annular piezoelectric actuators 23a and 23b, the light deflection mirror 20 coincides with the axes of the torsion bars 24a and 24b, and rotates around the Y axis passing through the center of the light deflection mirror 20 in the figure. Reciprocally rotate.

  As a result, when the upper light deflector 15 reflects the laser beam by the light deflection mirror 20, the upper light deflector 15 emits the light beam to the front of the upper light deflector 15, and further scans in two directions, the X-axis direction and the Y-axis direction. be able to.

  Below the second support portion 22, electrode pads 32 a to 32 e (hereinafter referred to as electrode pads 32) and electrode pads 33 a to 33 e (hereinafter referred to as electrode pads 33) are disposed. The electrode pads 32 and 33 are electrically connected so that a drive voltage can be applied to each electrode of the piezoelectric actuators 31a and 31b and the semi-annular piezoelectric actuators 23a and 23b.

  In addition, even if there is no part of the piezoelectric actuators 31a and 31b, it can function as an optical deflector. In this case, the portion of the first support portion 21 serves as a support, and the uniaxial optical deflector in which the light deflection mirror 20 reciprocates around the Y axis is configured.

  Next, with reference to FIG. 6, the operation will be described taking the piezoelectric actuator 31a as an example. As described above, the upper light deflector 15 allows the optical deflection mirror 20 to reciprocate around the X-axis by operating the piezoelectric actuators 31a and 31b.

  FIG. 6A is a view in which the piezoelectric actuator 31a disposed on the left side is cut out when the upper light deflector 15 is viewed from the front side. The piezoelectric actuator 31a has a shape in which four piezoelectric cantilevers are arranged, and the piezoelectric cantilevers 31a (1), 31a (2), 31a (3), and 31a (4) are arranged in order from the side away from the first support portion 21. is there.

  For example, in the piezoelectric actuator 31a, a first voltage is applied to the odd-numbered piezoelectric cantilevers 31a (1) and 31a (3). A second voltage having a phase opposite to that of the first voltage is applied to the even-numbered piezoelectric cantilevers 31a (2) and 31a (4).

  By applying the voltage in this manner, as shown in FIG. 6B, the odd-numbered piezoelectric cantilevers 31a (1), 31a (3) are bent and displaced upward in FIG. 6B, and the even-numbered piezoelectric cantilevers 31a ( 2) and 31a (4) can be bent and displaced downward in FIG. 6B.

  The piezoelectric actuator 31b is composed of four piezoelectric cantilevers as in the piezoelectric actuator 31a, and is the first, second, third, and fourth piezoelectric cantilevers in order from the one closer to the first support portion 21. These two piezoelectric cantilevers can be bent and displaced rearward in FIG. 5, and the even two piezoelectric cantilevers can be bent and displaced forward in FIG.

  5 from the upper side (torsion bar 24a side) of the light deflection mirror 20 in FIG. 5 to the front side in FIG. 5 (upper side is FIG. 6). The light deflection mirror 20 can be displaced so as to move in the U direction.

  Also, by applying a second voltage to the odd-numbered piezoelectric cantilevers 31a (1) and 31a (3) and applying a first voltage to the even-numbered piezoelectric cantilevers 31a (2) and 31a (4). The light deflection mirror 20 is arranged such that the upper side (torsion bar 24a side) in FIG. 5 of the light deflection mirror 20 is the front side in FIG. 5 from the lower side (torsion bar 24b side) of the light deflection mirror 20 in FIG. Can be displaced. By continuously performing these controls, the light deflection mirror 20 can be rotated (swinged) about the X axis.

  The lower light deflector 16 is configured in the same manner as the upper light deflector 15, and a detailed description thereof will be omitted. Irradiation is performed so that the light beams of the second and third excitation light sources 12 and 13 overlap the center of the light deflection mirror 20 of the lower light deflector 16. Therefore, the light irradiation position is the same as that shown in FIG. However, the second and third excitation light sources 12 and 13 are arranged at different angles with respect to the light deflection mirror 20 of the lower light deflector 16 so that the reflected lights are separated as shown in FIG. While operating in the same manner as the optical deflector 15, two light beams are scanned.

  As a method of applying the first voltage and the second voltage, there is a method of applying an antiphase voltage changing on a sine curve or a comb tooth to an odd-numbered piezoelectric cantilever and an even-numbered piezoelectric cantilever. Further, the present invention is not limited to the case where the cantilever is alternately bent in the vertical direction, and any one of the upper and lower bending and the state where the cantilever is not bent may be alternately repeated.

  When the vehicular lamp 2 is driven to form the high beam light distribution pattern HP on the virtual vertical screen S, the control device firstly includes the first to third excitation light sources 11 to 13, the upper light deflector 15, and the lower light deflector 15. A control signal is transmitted toward the optical deflector 16.

  In response to the control signal, laser beams are output from the first to third excitation light sources 11 to 13, and the upper optical deflector 15 and the lower optical deflector 16 are driven so that the respective optical deflection mirrors 20 are rotated around the X axis and It rotates around the Y axis.

  As shown in FIG. 2, the laser beam output from the first excitation light source 11 is incident on the rotation center of the light deflection mirror 20 of the upper light deflector 15 and is rotated horizontally and vertically by the rotating light deflection mirror 20. Scanned in the direction. The elliptical dotted line of the light deflection mirror 20 shown in FIG. 5 indicates the laser spot output from the first excitation light source 11.

  The laser beams output from the second and third excitation light sources 12 and 13 are incident on the rotation center of the light deflection mirror 20 of the lower light deflector 16, and are rotated in the horizontal and vertical directions by the rotating light deflection mirror 20. Scanned. Laser spots from the second and third excitation light sources 12 and 13 overlap at the same position on the light deflection mirror 20.

  As shown in FIG. 7A, the laser beam emitted from the first excitation light source 11 passes through the upper light deflector 15, the correction mirror 17, the phosphor 18, and the projection lens 3, and is the first in the middle of the virtual vertical screen S. Scanning is performed in the scanning range SR1 (a two-dimensional image is projected).

  As shown in FIG. 7B, the laser beam emitted from the second excitation light source 12 passes through the lower light deflector 16, the correction mirror 17, the phosphor 18, and the projection lens 3 to the second scan on the left side of the virtual vertical screen S. Scan in the range SR2.

  As shown in FIG. 7C, the laser beam emitted from the third excitation light source 13 passes through the lower light deflector 16, the correction mirror 17, the phosphor 18 and the projection lens 3, and the third scan on the right side of the virtual vertical screen S. Scan in the range SR3. In the present embodiment, the second and third scanning ranges SR2 and SR3 have substantially the same size.

  The first scanning range SR1 and the second and third scanning ranges SR2 and SR3 overlap at the center of the virtual vertical screen S. Further, the second scanning range SR2 and the third scanning range SR3 overlap each other at the center in the left-right direction of the virtual vertical screen S.

  As shown in FIG. 7D, due to the overlap of the first to third scanning ranges SR1 to SR3, the high beam light distribution pattern HP on the virtual vertical screen S includes a region P1 in which a single ray is scanned and two rays. A region P2 to be scanned is divided into a region P3 in which three light beams are scanned.

  In addition, the elliptical dotted line shown by FIG. 7A-FIG. 7C has shown the laser spot from each of the 1st-3rd excitation light sources 11-13 in the same moment. Laser spots that have overlapped on the same light deflection mirror 20 are also separated on the virtual vertical screen S without overlapping. The laser spot is also divided on the phosphor 18.

  The laser beams output from the second and third excitation light sources 12 and 13 are scanned on the phosphor 18 and the virtual vertical screen S in a separated state. Therefore, it is possible to control that light is extracted only at a desired position without affecting the entire luminous intensity distribution (the light source is turned off when scanning is at the desired position).

  In the high beam light distribution pattern, it is necessary to maximize the luminous intensity at the center. In the present embodiment, since the region P3 in which three light beams are scanned is at the center of the high beam light distribution pattern HP, the luminous intensity at the center can be maximized.

  Since the high beam light distribution pattern HP is formed by the first to third scanning ranges SR1 to SR3, each of the first to third scanning ranges SR1 to SR3 has a smaller range than the high beam light distribution pattern HP. . Thereby, the scanning angle by the upper light deflector 15 and the lower light deflector 16 can be made smaller than that in which one light beam is scanned by the light deflector to form the high beam light distribution pattern HP. Since the scanning angle becomes small, the burden on the upper light deflector 15 and the lower light deflector 16 can be reduced, and the life can be improved.

  In addition, since the region P3 where the three light beams are scanned is positioned at the center of the high beam light distribution pattern HP, each of the light beams emitted from the first to third excitation light sources 11 to 13 is one excitation. The amount of light can be reduced as compared with the case where the light distribution pattern for high beam is formed by the light beam emitted from the light source. Thereby, a low output excitation light source can be used and cost reduction can be aimed at.

  In addition, as shown in FIG. 8, the control apparatus 19 controls the brightness | luminance of the 1st-3rd excitation light sources 11-13, and can form the elliptical high beam light distribution pattern HP. In addition, by controlling the luminance of the first to third excitation light sources 11 to 13, the luminous intensity may gradually decrease from the central portion toward the outside.

  The number of light deflectors can be changed as appropriate, and at least one of the plurality of light deflectors allows a plurality of lights to be incident thereon and emits a light beam toward the light deflectors. The number of can be changed as appropriate. Further, the correction mirror may not be provided.

[Second Embodiment]
In the embodiment shown in FIGS. 9 and 10, the control device 19 controls the luminance of the second and third excitation light sources 12 and 13 at the left and right ends of the second scanning range SR2 and the third scanning range SR3. In addition, the same code | symbol is attached | subjected to the structural member similar to the said embodiment, and the detailed description is abbreviate | omitted.

  The left and right end portions of the second scanning range SR2 are folding portions when the light deflection mirror 20 of the lower light deflector 16 is reciprocally rotated in order to scan the light beam in the left-right direction. In this folding portion, the light deflection mirror The rotation of 20 is temporarily stopped. That is, in the folded portion, the light irradiation time is longer and the luminous intensity is higher than in other portions.

  The control device 19 is directed to the folded portion when the light deflection mirror 20 of the lower light deflector 16 is reciprocally rotated at the left and right ends of the second scanning range SR2 in order to scan the light beam in the left-right direction. The luminance control for stopping the driving of the second excitation light source 12 is performed at the left and right ends of the second scanning range SR2 by gradually decreasing the luminance of the second excitation light source 12.

  Similarly, the control device 19 is a left and right end portion of the third scanning range SR3, and serves as a folded portion when the light deflection mirror 20 of the lower light deflector 16 is reciprocally rotated to scan the light beam in the left and right direction. The brightness of the third excitation light source 13 is gradually lowered, and brightness control is performed to stop driving the third excitation light source 13 at the left and right ends of the third scanning range SR3. Similarly, control may be performed to lower the luminance of the second and third excitation light sources 12 and 13 at the upper and lower ends of the second scanning range SR2 and the third scanning range SR3. In addition, the luminance reduction rate when the luminance of the second and third excitation light sources 12 and 13 is gradually reduced can be changed as appropriate.

  As described above, since the driving of the second and third excitation light sources 12 and 13 is stopped at the left and right ends of the second scanning range SR2 and the third scanning range SR3, the second scanning range SR2 and the third scanning range SR3. It is possible to prevent the left and right end portions of the light from becoming brighter than the other portions. Thereby, it is possible to prevent unevenness in luminous intensity in the second scanning range SR2 and the third scanning range SR3.

[Third Embodiment]
In the embodiment shown in FIGS. 11 and 12, the control device 19 controls the luminance of the second and third excitation light sources 12 and 13 at the upper and lower ends of the second scanning range SR2 and the third scanning range SR3. In addition, the same code | symbol is attached | subjected to the structural member similar to the said embodiment, and the detailed description is abbreviate | omitted.

  As shown in FIG. 11A, the second scanning range SR2 and the third scanning range SR3 may be displaced in the vertical direction. In this case, the vertical position is shifted between the left side portion and the right side portion in the light irradiation range.

  In order to prevent the deviation, as shown in FIG. 11B, mask control is performed so that the upper portion (ΔLu) of the second scanning range SR2 above the upper end of the third scanning range SR3 is a non-irradiation range. Mask control is performed in which the lower portion (ΔLd) of the second scanning range SR2 in SR3 is the non-irradiation range.

  As shown in FIG. 12, as the mask control, the control device 19 stops driving the second excitation light source 12 in the portion ΔLu and stops driving the third excitation light source 13 in the portion ΔLd. As a result, as shown in FIG. 11B, it is possible to irradiate a light beam with no deviation in the vertical position between the left part and the right part in the light irradiation range.

  Further, as shown in FIG. 11A, in order to correct the deviation (ΔLc) between the drawing center in the vertical direction of the second scanning range SR2 and the drawing center in the vertical direction of the third scanning range SR3, the control device 19 Perform correction processing.

  As a correction process, the control device 19 offsets the drawing timing of the second scanning range SR2 downward by ΔLc and offsets the drawing timing of the third scanning range SR3 upward by ΔLc. Alternatively, the drawing timing of the second scanning range SR2 is offset downward by ΔLc / 2, and the drawing timing of the third scanning range SR3 is offset upward by ΔLc / 2. Alternatively, the drawing timing of the second scanning range SR2 is offset downward by ΔLc2 (ΔLc2 <ΔLc), and the drawing timing of the third scanning range SR3 is offset upward by ΔLc−ΔLc2. Alternatively, the drawing timing of the third scanning range SR3 is offset upward by ΔLc2 (ΔLc2 <ΔLc), and the drawing timing of the second scanning range SR2 is offset downward by ΔLc−ΔLc2.

  By performing such correction processing, it is possible to make the drawing center in the vertical direction of the second scanning range SR2 coincide with the drawing center in the vertical direction of the third scanning range SR3.

[Fourth Embodiment]
In the embodiment shown in FIG. 13, the first scanning range SR <b> 1 is formed by light rays emitted from two excitation light sources. In addition, the same code | symbol is attached | subjected to the structural member similar to the said embodiment, and the detailed description is abbreviate | omitted.

  In this embodiment, a first spot light distribution excitation light source 51, a second spot light distribution excitation light source 52, a half-wave plate 53, a prism 54, and a polarization beam splitter 55 are provided. Light from 55 enters the upper light deflector 15. The first and second spot light distribution excitation light sources 51 and 52 are configured in the same manner as the first excitation light source 11.

  The first spot light distribution excitation light source 51 and the second spot light distribution excitation light source 52 are arranged so that their polarization states coincide. The half-wave plate 53 rotates the linearly polarized light of the light from the second spot light distribution excitation light source 52 by 90 ° and makes it incident on the prism 54. The prism 54 reflects the light beam from the half-wave plate 53 and makes it incident on the polarization beam splitter 55.

  The polarization beam splitter 55 reflects the second light beam from the prism 54 (the light beam from the second spot light distribution excitation light source 52) and transmits the first light beam from the first spot light distribution excitation light source 51. Each member is arranged so that the optical axis of the first light beam and the optical axis of the second light beam coincide. The first light beam and the second light beam are incident on the light deflection mirror 20 of the upper light deflector 15 in a combined state. As a result, it is possible to irradiate more beautiful light as compared with the light incident on the light deflection mirror 20 of the upper light deflector 15 in a state where a plurality of light beams are not overlapped. The first light beam and the second light beam only need to satisfy at least one of the same optical axis and combined state.

  The polarization state of the first spot light distribution excitation light source 51 and the polarization state of the second spot light distribution excitation light source 52 may be orthogonal to each other. In this case, the half-wave plate 53 is not necessary.

  You may make it implement combining the said 1st-4th embodiment.

  In the above embodiment, the second scanning range SR2 and the third scanning range SR3 are separated in the left-right direction, but may be separated in the up-down direction. Further, the first scanning range SR1 may be a horizontally long scanning range.

  In the above embodiment, the high beam light distribution pattern HP is formed at the center of the virtual vertical screen S, but it may be formed at a position shifted from the center.

  Moreover, in the said embodiment, although the light beam is irradiated to the virtual vertical screen by one optical system, you may make it superimpose not only this but the light from several optical systems on a virtual vertical screen.

  Moreover, although the excitation light source is used in the said embodiment, you may use the light source which irradiates the color of the light source itself. In this case, the phosphor (projector) is not required and the light from the light source is irradiated as it is. Further, a light transmissive diffusion plate may be used instead of the phosphor. Further, the light source may irradiate a single light beam. For example, the light source may be guided by a fiber. The light beam guided to the fiber may be a white light beam mixed in RGB.

DESCRIPTION OF SYMBOLS 2 ... Vehicle lamp, 3 ... Projection lens, 4 ... Lens holder, 5 ... Main body cylinder, 6 ... Bottom cover, 11-13 ... 1st-3rd excitation light source, 11a-13a ... Semiconductor light-emitting device, 11b-13b ... Condensing lens, 15 ... Upper light deflector, 16 ... Lower light deflector, 17 ... Correction mirror, 18 ... Phosphor, 19 ... Control device, 20 ... Light deflection mirror, 21, 22 ... First, second support part , 23a, 23b ... semi-annular piezoelectric actuator, 24a, 24b ... torsion bar, 31a, 31b ... piezoelectric actuator, 32a-32e ... electrode pad, 33a-33e ... electrode pad, 51, 52 ... first and second spot light distribution Excitation light source, 53 ... 1/2 wavelength plate, 54 ... prism, 55 ... polarizing beam splitter

Claims (6)

A vehicular lamp that forms a predetermined light distribution pattern,
At least three or more light sources that emit light;
A first light deflecting mirror that is arranged so that a light beam emitted from at least one of the light sources is incident thereon and reflects the light beam;
A first optical deflector that scans the light beam by changing a reflection direction of the light beam by the first light deflection mirror;
A second light deflection mirror that is arranged so that a plurality of light beams emitted from the plurality of light sources are incident thereon and reflects the plurality of light beams;
A second optical deflector that scans so that center positions of a scanning range of the plurality of light beams are separated from each other by changing a reflection direction of the plurality of light beams by the second light deflection mirror;
An optical system for forming the predetermined light distribution pattern by a plurality of light beams scanned by the first light deflector and the second light deflector;
A vehicular lamp characterized by comprising: The vehicular lamp according to claim 1,
The vehicular lamp characterized in that when the light beams emitted from the plurality of light sources are incident on the first light deflection mirror, the plurality of light beams incident on the first light deflection mirror have a single optical axis. . The vehicular lamp according to claim 1 or 2,
When the light beams emitted from a plurality of the light sources are incident on the first light deflection mirror, the plurality of light beams are incident on the first light deflection mirror in an overlapping state. Light fixture. The vehicular lamp according to any one of claims 1 to 3,
When the scanning positions of a plurality of light beams emitted from the plurality of light sources and scanned by the second light deflection mirror are left and right ends of a scanning range, the light beams are emitted toward the second light deflection mirror. A vehicular lamp comprising control means for controlling the luminance of a plurality of light sources to be lowered. At least three or more light sources that emit light;
A first light deflecting mirror that is arranged so that a light beam emitted from at least one of the light sources is incident thereon and reflects the light beam;
A first optical deflector that scans the light beam by changing a reflection direction of the light beam by the first light deflection mirror;
A second light deflection mirror that is arranged so that a plurality of light beams emitted from the plurality of light sources are incident thereon and reflects the plurality of light beams;
A second optical deflector that scans so that center positions of a scanning range of the plurality of light beams are separated from each other by changing a reflection direction of the plurality of light beams by the second light deflection mirror;
An optical system that forms a predetermined light distribution pattern by a plurality of light beams scanned by the first light deflector and the second light deflector, and a method for driving a vehicular lamp,
The plurality of light sources that irradiate the second light deflection mirror with light beams are scanned from the plurality of light sources and scanned by the second light deflection mirror. The driving method of the vehicular lamp is driven so that the luminance of the light beam to be emitted is lowered. In the driving method of the vehicular lamp according to claim 5,
Center positions of a plurality of scanning ranges by a plurality of light beams irradiated from the plurality of light sources and scanned by the second light deflection mirror are set apart from each other in the left-right direction, and the plurality of scanning ranges match in the up-down direction. If not, the plurality of light sources that irradiate the second light deflection mirror with light beams are scanned from the scanning positions of the plurality of light beams emitted from the plurality of light sources and scanned by the second light deflection mirror. A driving method for a vehicular lamp, wherein the vehicle lamp is driven so as to be in a non-irradiation state when the upper end portion or the lower end portion is formed.