JP2018197053A - Vehicle lamp fitting - Google Patents

Abstract

To provide a vehicle lamp fitting capable of changing a range of high illuminance.SOLUTION: A vehicle lamp fitting 2 includes a projection lens 3, a lens holder 4, a body cylinder 5, a bottom cover 6, first to fourth excitation light sources 11 to 14, first to fourth light deflectors 15a to 15d, first to fourth correction mirrors 17a to 17d, and a fluorescent body 18. Illuminance at a position deviated from a central part is highest, the illuminance gradually becomes low toward the end, and driving of the first to fourth excitation light sources 11 to 14 is controlled so that illuminance becomes 0 on both ends. A control device 19 controls the illuminance so that illuminance of (1/8) T and (7/8) T becomes highest. Thereby, a portion deviated to the left from the center of light distribution pattern HP for high beam becomes a high illuminance range.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a vehicular lamp including an optical deflector that scans light.

  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. Some light patterns are projected forward. Since the amount of light required for such a vehicular lamp is not sufficient from light from one light source, a plurality of light sources are used.

  For example, in the vehicular lamp described in Patent Document 1, light is emitted from three light sources toward the light deflection mirrors of three light deflectors, and the light deflection mirror is rotated and scanned in this state. Thus, three light distribution patterns are formed. Then, by superimposing a part of the three light distribution patterns, a light distribution pattern preferable as a vehicular lamp having a high illuminance at the center and a low illuminance at the end is obtained.

JP2015-138735A

  However, in the vehicular lamp described in Patent Document 1, although the central portion can have high illuminance, the position shifted from the central portion cannot be high illuminance.

  An object of this invention is to provide the vehicle lamp which can change the range of high illumination intensity.

  The vehicular lamp of the present invention is a vehicular lamp that forms a predetermined light distribution pattern extending in the vertical direction and the horizontal direction, and includes a plurality of light sources that emit light and a plurality of lights that are emitted from the plurality of light sources. The plurality of light deflecting mirrors and the plurality of light deflecting mirrors deflecting the plurality of lights, or changing a reflection direction of the plurality of lights by the plurality of light deflecting mirrors. A plurality of light deflectors that scan in a scanning range having the same length in the left-right direction and different lengths in the up-down direction, and an optical that forms the predetermined light distribution pattern by a plurality of lights scanned by the plurality of light deflectors And a control means for controlling the driving of the plurality of light deflectors and capable of changing a range of maximum illuminance in the left-right direction of the light scanned by the plurality of light deflectors. .

  According to the present invention, the control means controls the driving of the plurality of optical deflectors that scan the plurality of light beams in the scanning ranges having the same length in the left-right direction and different lengths in the up-down direction. The range of the maximum illuminance in the left-right direction of the light scanned by the instrument can be changed.

  The vehicular lamp of the present invention is a vehicular lamp that forms a predetermined light distribution pattern extending in the vertical direction and the horizontal direction, and includes a plurality of light sources that emit light and a plurality of lights that are emitted from the plurality of light sources. The plurality of light deflecting mirrors and the plurality of light deflecting mirrors deflecting the plurality of lights, or changing a reflection direction of the plurality of lights by the plurality of light deflecting mirrors. The predetermined light distribution pattern is formed by a plurality of light deflectors that scan in a scanning range that has a predetermined length or more in the left-right direction and different lengths in the vertical direction, and a plurality of lights scanned by the plurality of light deflectors And an optical system for controlling the driving of the plurality of light deflectors, and a control unit capable of changing a range in which the maximum illuminance in the left-right direction of the light scanned by the plurality of light deflectors is changed. Better .

  According to the present invention, the control means controls the driving of the plurality of optical deflectors that scan the plurality of lights in a scanning range having a predetermined length or more in the left-right direction and different lengths in the vertical direction. The range in which the maximum illuminance in the left-right direction of the light scanned by the optical deflector can be changed.

  Furthermore, when the control means increases the maximum illuminance of the light scanned by the plurality of optical deflectors, the horizontal direction of the optical deflector having a narrower scanning range than the other of the plurality of optical deflectors. It is preferable to control to narrow the scanning range.

  According to this configuration, the maximum illumination intensity of the light scanned by the plurality of optical deflectors is reduced by narrowing the horizontal scanning range of the recording deflector having a narrower scanning range than the other of the plurality of optical deflectors. Can be high.

  The control means shifts the irradiation pattern of the plurality of lights scanned by the plurality of light deflectors in the left-right direction, so that the maximum illuminance in the left-right direction of the light scanned by the plurality of light deflectors is In the irradiation pattern shifted in the left-right direction, one end portion protruding from one end in the left-right direction of the range forming the predetermined light distribution pattern was deleted and shifted in the left-right direction. Control is performed so that the portion from the other side end of the irradiation pattern to the other end of the range where the predetermined light distribution pattern is formed is irradiated with the illuminance at the other side end of the irradiation pattern shifted in the left-right direction. Is preferred.

  According to this configuration, by shifting the irradiation pattern in the left-right direction, the range in which the maximum illuminance in the left-right direction of the light scanned by the plurality of optical deflectors can be changed.

  Further, the control means shifts the irradiation pattern of the plurality of lights scanned by the plurality of light deflectors in the left-right direction, so that the maximum illuminance in the left-right direction of the light scanned by the plurality of light deflectors is In the irradiation pattern shifted in the left-right direction, one end portion protruding from one end in the left-right direction of the range forming the predetermined light distribution pattern was deleted and shifted in the left-right direction. It is preferable to control so that the part from the other side end of the said irradiation pattern to the other end of the range which forms the said predetermined light distribution pattern is not irradiated.

  According to this configuration, by shifting the irradiation pattern in the left-right direction, the range in which the maximum illuminance in the left-right direction of the light scanned by the plurality of optical deflectors can be changed.

  In addition, a storage unit that stores a plurality of the predetermined light distribution patterns according to a driving situation, the control unit reads one of the predetermined light distribution patterns stored in the storage unit, It is preferable to control based on the read predetermined light distribution pattern.

  According to this configuration, it is possible to form a predetermined light distribution pattern according to the traveling situation.

The perspective view which shows the vehicle lamp of this embodiment. Sectional drawing of the up-down direction which shows a vehicle lamp. Sectional drawing of the left-right direction which shows a vehicle lamp. III-III sectional view taken on the line 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 scanned with the vertical light deflector at the time of making a center part into a high illumination intensity range. Schematic which shows the illumination intensity of the state which shifted the high illumination intensity range from center part. Schematic which shows the light scanned with the up-and-down light deflector when the position which shifted | deviated from the center part was made into the high illumination intensity range. Schematic which shows the scanning range in the virtual vertical screen S of 2nd Embodiment. Schematic which shows the illumination intensity of the state which shifted the high illumination intensity range of 2nd Embodiment from center part. Schematic which shows the light scanned with the up-and-down optical deflector at the time of making the position which shifted | deviated from the center part of 2nd Embodiment into the high illumination intensity range. Schematic which shows the light before and behind the shift of embodiment which shifts light distribution pattern data to the left direction.

[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 FIGS. 2 and 3, the vehicular lamp 2 is configured to two-dimensionally convert the excitation light from the first to fourth excitation light sources 11 to 14 and the first to fourth excitation light sources 11 to 14 (horizontal direction and First to fourth optical deflectors 15a to 15d that scan in the vertical direction). The driving of the first to fourth excitation light sources 11 to 14 and the first to fourth optical deflectors 15a to 15d is controlled by a control device 19 (see FIG. 5) described later in detail. In FIG. 2, only the first and fourth excitation light sources 11 and 14 and the first and fourth optical deflectors 15a and 15d are shown, and the second and third excitation light sources 12 and 13 and the second and third light beams are illustrated. The deflectors 15b and 15c are omitted. In FIG. 3, only the second and third excitation light sources 12 and 13 and the second and third optical deflectors 15b and 15c are shown, and the first and fourth excitation light sources 11 and 14 and the first and fourth lights are illustrated. The deflectors 15a and 15d are omitted.

  The vehicular lamp 2 includes first to fourth correction mirrors 17a to 17d that correct distortion (details will be described later) of light scanned by the first to fourth light deflectors 15a to 15d, and first to fourth correction mirrors 17a to 17d. And a phosphor 18 (projector) on which a two-dimensional image corresponding to a predetermined light distribution pattern is drawn by the light corrected by the fourth correction mirrors 17a to 17d. The two-dimensional image drawn on the phosphor 18 is projected forward by the projection lens 3.

  The first to fourth excitation light sources 11 to 14, the first to fourth optical deflectors 15 a to 15 d, the first to fourth correction mirrors 17 a to 17 d, and the phosphor 18 are disposed inside the main body cylinder 5, and are fixed members (Not shown). In addition, you may provide the fin for heat radiation in the outer peripheral surface of the main body cylinder 5. FIG.

  The first excitation light source 11 collects light from the semiconductor light emitting element 11a and a 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 of the excitation light sources 12 to 14 includes semiconductor light emitting elements 12a, 13a, and 14a, and condenser lenses 12b, 13b, and 14b. Each of the semiconductor light emitting elements 11a to 14a 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-14a may be LED. Further, a laser irradiator that irradiates laser beams mixed in RGB may be used.

  As shown in FIG. 2, the first excitation light source 11 irradiates a laser beam toward the rotation center of the light deflection mirror 20 of the first optical deflector 15a described later in detail. The fourth excitation light source 14 irradiates a laser beam toward the rotation center of a light deflection mirror 20 of a fourth light deflector 15d described later in detail. As shown in FIG. 3, the second excitation light source 12 irradiates a laser beam toward the rotation center of the light deflection mirror 20 of the second optical deflector 15b described later in detail. The third excitation light source 13 irradiates a laser beam toward the rotation center of the light deflection mirror 20 of the third light deflector 15c described later in detail.

  As shown in FIG. 4, the 1st-4th excitation light sources 11-14 are arrange | positioned away by 90 degree pitch in the front view.

  As shown in FIGS. 2 and 3, the light scanned by the first to fourth optical deflectors 15 a to 15 d is incident on the first to fourth correction mirrors 17 a to 17 d. The light scanned by the first to fourth optical deflectors 15 a to 15 d is distorted due to the influence of the incident angle of the light on the optical deflection mirror 20 and the rotation axis of the optical deflection mirror 20.

  The first to fourth correction mirrors 17a to 17d correct and reflect the distortion of the light scanned by the first to fourth optical deflectors 15a to 15d, and the reflection surfaces are curved.

  The phosphor 18 is scanned two-dimensionally by the first to fourth optical deflectors 15a to 15d, receives the laser light corrected by the first to fourth correction mirrors 17a to 17d, and receives at least one of the laser light. The part is converted into light of a different wavelength, and the outer shape is formed in a rectangular plate shape (or layer shape). The phosphor 18 is disposed in the vicinity of the focal point of the projection lens 3. 2 and 3, the thickness of the phosphor 18 is exaggerated.

  For example, when a laser diode (LD) that emits blue laser light is used as the semiconductor light emitting elements 11a to 14a of the respective excitation light sources 11 to 14, the phosphor 18 is excited by the blue laser light and is yellow. Those that emit light are used. The phosphor 18 is scanned in two dimensions by the first to fourth light deflectors 15a to 15d, and then is arranged in a predetermined manner by the blue laser beam corrected by the first to fourth correction mirrors 17a to 17d. A two-dimensional image corresponding to the light pattern 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 and the laser beam in the blue region that is transmitted (passed) therethrough. This is due to the emission of white light (pseudo white light) by color mixing with (yellow light).

  On the other hand, when a laser diode (LD) that emits near-ultraviolet laser light is used as the semiconductor light emitting elements 11a to 14a, the phosphor 18 is excited by the near-ultraviolet laser light to emit red, green, and blue. Those that emit light of three colors are used. The phosphor 18 is scanned in two dimensions by the first to fourth optical deflectors 15a to 15d, and then predetermined by laser light in the near ultraviolet region corrected by the first to fourth correction mirrors 17a to 17d. A two-dimensional image corresponding to the light distribution pattern is drawn as a white image. The two-dimensional image is drawn as a white image when the near-ultraviolet laser light is irradiated, the phosphor 18 emits light by the near-ultraviolet laser light (light of three colors red, green, and blue). ) To emit white light (pseudo white light). Note that white light may be emitted by exciting a blue phosphor and a yellow phosphor with near-ultraviolet laser light.

  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 first to fourth optical deflectors 15a to 15d scan the excitation light collected by the condenser lenses 11b to 14b of the first to fourth excitation light sources 11 to 14 in the horizontal direction and the vertical direction.

  As shown in FIG. 5, the first to fourth excitation light sources 11 to 14 and the first to fourth optical deflectors 15 a to 15 d are connected to a control device 19 that comprehensively controls the vehicular lamp 2, and the control device The drive is controlled by 19.

  The first to fourth optical deflectors 15a to 15d are, for example, MEMS scanners. The driving method of the optical deflector is roughly divided into a piezoelectric method, an electrostatic method, and an electromagnetic method, and any method may be used. In this embodiment, a piezoelectric optical deflector will be described as a representative.

  As shown in FIG. 6, the first optical deflector 15a is a two-axis optical deflector, which is manufactured using a semiconductor process or MEMS (Micro Electro Mechanical Systems) technology, and emits light incident from a certain direction. The light is reflected by the light deflecting mirror 20 as a rotating micromirror and emitted as reflected light (laser light).

  The first optical deflector 15a 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 light from the first excitation light source 11 is reflected by the light deflection mirror 20, and the reflected light (laser light) scans on the virtual vertical screen S via the first correction mirror 17 a, the phosphor 18 and the projection lens 3.

  At this time, the control device 19 transmits a control signal to the first optical deflector 15a and the first excitation light source 11. The semi-annular piezoelectric actuators 23a and 23b of the first optical deflector 15a 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 optical deflection mirror 20. . In addition, on / off and brightness of the laser light are controlled in each of the excitation light sources 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. 6, 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 first light deflector 15 a 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. 5, 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 first optical deflector 15a reflects the laser light by the optical deflection mirror 20, the first optical deflector 15a emits the light forward of the first optical deflector 15a and further in two directions, the X-axis direction and the Y-axis direction. Can be scanned.

  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, the operation will be described with reference to FIG. 7 taking the piezoelectric actuator 31a as an example. As described above, the first optical deflector 15a allows the optical deflection mirror 20 to reciprocate around the X axis by operating the piezoelectric actuators 31a and 31b.

  FIG. 7A is a view in which the piezoelectric actuator 31a disposed on the left side is cut out when the first optical deflector 15a 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 way, as shown in FIG. 7B, the odd-numbered piezoelectric cantilevers 31a (1) and 31a (3) are bent and displaced upward in FIG. 7B, and the even-numbered piezoelectric cantilevers 31a ( 2) and 31a (4) can be bent and displaced downward in FIG. 7B.

  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. The two piezoelectric cantilevers can be bent and displaced rearward in FIG. 6, and the even two piezoelectric cantilevers can be bent and displaced forward in FIG.

  Accordingly, the upper side (torsion bar 24a side) of the light deflection mirror 20 in FIG. 6 becomes the rear side of FIG. 6 from the lower side (torsion bar 24b side) of the light deflection mirror 20 in FIG. The light deflection mirror 20 can be displaced so as to move in the U direction in FIG.

  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). 6 so that the lower side (torsion bar 24b side) in FIG. 6 of the light deflection mirror 20 is the rear side in FIG. 6 from the upper side (torsion bar 24a side) in FIG. 20 can be displaced. By continuously performing these controls, the light deflection mirror 20 can be rotated (swinged) about the X axis.

  The second to fourth optical deflectors 15b to 15d are configured in the same manner as the first optical deflector 15a, and detailed description thereof is omitted.

  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, first, the control device first to fourth excitation light sources 11 to 14 and first to fourth light deflections. A control signal is transmitted toward the devices 15a to 15d.

  In response to the control signal, laser light is output from the first to fourth excitation light sources 11 to 14, and the first to fourth optical deflectors 15 a to 15 d are driven so that each of the optical deflection mirrors 20 moves around the X axis and It rotates around the Y axis.

  As shown in FIG. 2, the laser light output from the first excitation light source 11 is incident on the rotation center of the light deflection mirror 20 of the first optical deflector 15a, and is rotated in the horizontal direction by the rotating light deflection mirror 20. Scans vertically. The elliptical dotted line of the light deflection mirror 20 shown in FIG. 6 indicates the laser spot output from the first excitation light source 11.

  As shown in FIGS. 2 and 3, the laser beams output from the second to fourth excitation light sources 12 to 14 are incident on the rotation center of the light deflection mirror 20 of the second to fourth optical deflectors 15b to 15d. Thus, scanning is performed in the horizontal direction and the vertical direction by the rotating light deflection mirror 20.

  As shown in FIG. 8A, the laser light emitted from the first excitation light source 11 is a solid line of the virtual vertical screen S through the first optical deflector 15a, the first correction mirror 17a, the phosphor 18 and the projection lens 3. Scanning is performed in the first scanning range SR1 shown (a two-dimensional image is projected).

  As shown in FIG. 8B, the laser light emitted from the second excitation light source 12 is a solid line of the virtual vertical screen S via the second optical deflector 15b, the second correction mirror 17b, the phosphor 18 and the projection lens 3. Scanning is performed in the second scanning range SR2 shown. In the second scanning range SR2, the horizontal direction is the same length as the first scanning range SR1, and the vertical direction is shorter than the first scanning range SR1. The second scanning range SR2 overlaps to be included in the first scanning range SR1.

  As shown in FIG. 8C, the laser light emitted from the third excitation light source 13 is a solid line of the virtual vertical screen S through the third light deflector 15c, the third correction mirror 17c, the phosphor 18, and the projection lens 3. Scanning is performed in the third scanning range SR3 shown. The third scanning range SR3 has a horizontal direction that is the same length as the first scanning range SR1 and the second scanning range SR2, and a vertical direction that is shorter than the first scanning range SR1 and the second scanning range SR2. The third scanning range SR3 overlaps so as to be included in both the first scanning range SR1 and the second scanning range SR2.

  As shown in FIG. 8D, the laser light emitted from the fourth excitation light source 14 is a solid line of the virtual vertical screen S via the fourth optical deflector 15d, the fourth correction mirror 17d, the phosphor 18, and the projection lens 3. Scanning is performed in the fourth scanning range SR4 shown. In the fourth scanning range SR4, the horizontal direction is the same length as the first to third scanning ranges SR1 to SR3, and the vertical direction is shorter than the first to third scanning ranges SR1 to SR3. The fourth scanning range SR4 overlaps so as to be included in all of the first to third scanning ranges SR1 to SR3. Note that the same thing includes slightly different things.

  In the virtual vertical screen S, the first to fourth scanning ranges SR1 to SR4 overlap each other.

  As shown in FIG. 8E, due to the overlap of the first to fourth scanning ranges SR1 to SR4, the high beam light distribution pattern HP on the virtual vertical screen S includes a region P1 in which a single light is scanned and two lights. A region P2 to be scanned, a region P3 to be scanned with three lights, and a region P4 to be scanned with four lights are divided. In the present embodiment, the larger the number of light beams to be scanned, the more light that can be superimposed, so the luminous intensity can be increased. That is, the luminous intensity of the region P4 where the four lights are scanned can be maximized.

  As shown in FIG. 8F, the illuminance in the left-right direction of the high-beam light distribution pattern HP is set so that the central portion in the left-right direction has the highest illuminance and decreases toward the left and right ends. A memory 41 (see FIG. 5) connected to the control device 19 stores data of a plurality of high beam light distribution patterns HP corresponding to the traveling situation. The control device 19 reads out one of the data of the plurality of high beam light distribution patterns HP stored in the memory 41 according to the traveling situation, and performs control based on the read data of the high beam light distribution pattern HP. I do.

  The control device 19 has a first illuminance so that the illuminance in the vicinity of the center of the high beam light distribution pattern HP is the highest, the illuminance gradually decreases toward the end, and the illuminance becomes zero (no light is output) at both ends. The drive of the 4th excitation light sources 11-14 is controlled.

  As shown in FIG. 9, in the present embodiment, the control device 19 has (1/4) T and (3/3) where T is the one reciprocal scanning time of the first to fourth optical deflectors 15a to 15d. 4) The drive of the 1st-4th excitation light sources 11-14 is controlled so that the illumination intensity in T may become the highest. The light scanned by the first and second optical deflectors 15a and 15b shown in FIG. 9 and the light scanned by the third and fourth optical deflectors 15c and 15d are combined into the light shown in FIG. 8F. .

  As shown in FIG. 10, when the AFS (Adaptive Front-Lighting System), which will be described in detail later, is executed, or depending on the driving situation, the high illuminance range is shifted from the center to the left and right direction (for example, left direction). An optical pattern HP may be formed. In this case, the illuminance at the position shifted from the central portion is the highest depending on the portion where the high illuminance range is provided, the illuminance gradually decreases toward the end, and the illuminance is 0 (no light is output) at both ends. The drive of the 1st-4th excitation light sources 11-14 is controlled so that it may become. In this control, as shown in FIG. 11, the control device 19 controls the first to fourth excitation light sources 11 to 14 so that the illuminance at (1/8) T and (7/8) T is the highest. Control the drive. As a result, a portion shifted leftward from the center of the high beam light distribution pattern HP becomes a high illuminance range (see FIG. 10).

[Second Embodiment]
In the embodiment shown in FIGS. 12 to 14, the third scanning range SR3a and the fourth scanning range SR4a are shorter than the first scanning range SR1a and the second scanning range SR2a in the horizontal direction and the vertical direction. The first scanning range SR1a and the second scanning range SR2a are the same as the first scanning range SR1 and the second scanning range SR2 of the first embodiment. 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 FIGS. 12A to 12D, the fourth scanning range SR4a has the same length in the horizontal direction as the third scanning range SR3a and the vertical direction is shorter than the first to third scanning ranges SR1a to SR3a. Yes. The third scanning range SR3a and the fourth scanning range SR4a have a horizontal length equal to or longer than a length necessary for AFS (predetermined length = horizontal scanning angle ± 20 ° or more). The AFS is provided in a headlight of an automobile, and improves the visibility by turning the optical axis in the steering direction and irradiating light in the traveling direction during cornering while driving. . When the horizontal length of the third scanning range SR3a and the fourth scanning range SR4a is extremely short, the optical axis cannot be directed in the steering direction even if the range where the maximum illuminance is obtained in the left-right direction is changed. In order to prevent this, the horizontal lengths of the third scanning range SR3a and the fourth scanning range SR4a are defined to be longer than required for AFS.

  As shown in FIG. 12E, the high-beam light distribution pattern HP includes a region P1 where a single light is scanned, a region P2 where two lights are scanned, a region P3 where three lights are scanned, and 4 It is divided into a region P4 where one light is scanned.

  As shown in FIG. 12F, the illuminance in the left-right direction of the high-beam light distribution pattern HP is set so that the center in the left-right direction has the highest illuminance, and the illuminance decreases toward the left and right ends. The maximum illuminance in the high beam light distribution pattern HP of the present embodiment is higher than the maximum illuminance in the high beam light distribution pattern HP of the first embodiment.

  As in FIG. 9 of the first embodiment, the control device 19 has the highest illuminance in the vicinity of the center of the high beam light distribution pattern HP, gradually decreases toward the end, and the illuminance is 0 (light) at both ends. The driving of the first to fourth excitation light sources 11 to 14 is controlled so that

  In the present embodiment, the control device 19 controls the driving of the first to fourth excitation light sources 11 to 14 so that the illuminance at (1/4) T and (3/4) T is the highest.

  As illustrated in FIG. 13, when the AFS is performed or depending on the driving situation, a high beam light distribution pattern HP in which the high illuminance range is shifted in the left-right direction (for example, left direction) from the center may be formed. In this case, the illuminance at the position shifted from the central portion is the highest depending on the portion where the high illuminance range is provided, the illuminance gradually decreases toward the end, and the illuminance is 0 (no light is output) at both ends. The drive of the 1st-4th excitation light sources 11-14 is controlled so that it may become.

  In the present embodiment, light scanned by the first and second optical deflectors 15a and 15b (light output from the first and second excitation light sources 11 and 12), and the third and fourth optical deflectors 15c and 15c, The scanning range in the left-right direction is different from the light scanned at 15d (the light output from the third and fourth excitation light sources 13, 14), and the light is applied to the portion where the high illuminance range is provided after the scanning is started. Time to reach is different.

  As shown in FIG. 14, the control device 19 uses the light scanned by the first and second light deflectors 15a and 15b (light output from the first and second excitation light sources 11 and 12) as (1 / 8) The driving of the first and second excitation light sources 11 and 12 is controlled so that the illuminance at T and (7/8) T becomes the highest. Further, the control device 19 uses (1/16) T and (1/16) T and (the light output from the third and fourth excitation light sources 13 and 14) scanned by the third and fourth optical deflectors 15c and 15d. 15/16) The driving of the third and fourth excitation light sources 13 and 14 is controlled so that the illuminance at T becomes the highest. Thereby, the part shifted to the left from the center of the high beam light distribution pattern HP becomes the high illuminance range (see FIG. 13).

  In addition, you may implement combining the said 1st Embodiment and the said 2nd Embodiment. In this embodiment, the first embodiment is normally used, and when it is desired to increase the illuminance at the center of the high beam light distribution pattern HP, the second embodiment is switched.

  Further, as shown in FIG. 15, the light distribution pattern is changed by shifting the light distribution pattern data generated to form the set high beam light distribution pattern HP in the left-right direction (for example, the left direction). You may make it do. In this embodiment, the light distribution pattern data of the portion shifted to the left and protruding from the left end of the high beam light distribution pattern HP is deleted, and from the right end of the light distribution pattern data to the right end of the high beam light distribution pattern HP, New data is created so that the right end data of the light distribution pattern data is used.

  Further, an illuminance of 0 may be used from the right end of the light distribution pattern data to the right end of the high beam light distribution pattern HP.

  The number of optical deflectors and the number of excitation light sources that irradiate one optical deflector can be changed as appropriate.

  In the above embodiment, a part of the scanning range of the plurality of lights is overlapped, but may not be overlapped.

  In the above-described embodiment, light is emitted to the virtual vertical screen by one optical system. However, the present invention is not limited to this, and light from a plurality of optical systems may be superimposed on the virtual vertical screen. In this case, it is sufficient that at least one of the optical systems scans light from a plurality of light sources in different ranges with a single optical deflector as in the above embodiment.

  In the above embodiment, an excitation light source is used, but a light source that emits the color of the light source itself may be used. In this case, the phosphor (projector) is not necessary, 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. Furthermore, the light source may irradiate a single light beam, for example, the light may be guided by a fiber. The light guided to the fiber may be white light mixed with RGB.

DESCRIPTION OF SYMBOLS 2 ... Vehicle lamp, 3 ... Projection lens (optical system), 4 ... Lens holder, 5 ... Main body cylinder, 6 ... Bottom cover, 11-14 ... 1st-4th excitation light source, 11a-14a ... Semiconductor light-emitting device, 11b to 14b ... condensing lenses, 15a to 15d ... first to fourth light deflectors, 17a to 17d ... first to fourth correction mirrors, 18 ... phosphor, 19 ... control device (control means), 20 ... light Deflection mirrors, 21, 22 ... first and second support portions, 23a, 23b ... semi-annular piezoelectric actuators, 24a, 24b ... torsion bars, 31a, 31b ... piezoelectric actuators, 32a-32e ... electrode pads, 33a-33e ... electrodes Pad, 41 ... Memory (storage means)

Claims (6)

A vehicular lamp that forms a predetermined light distribution pattern extending in a vertical direction and a horizontal direction,
A plurality of light sources that emit light;
A plurality of light deflection mirrors for reflecting a plurality of lights emitted from the plurality of light sources;
By deflecting the plurality of lights with the plurality of light deflection mirrors or changing the reflection direction of the plurality of lights by the plurality of light deflection mirrors, the plurality of lights are vertically moved in the same length in the left-right direction. A plurality of optical deflectors for scanning in scanning ranges having different lengths in the direction;
An optical system for forming the predetermined light distribution pattern by a plurality of lights scanned by the plurality of light deflectors;
Control means for controlling driving of the plurality of light deflectors, and capable of changing a range of maximum illuminance in the left-right direction of the light scanned by the plurality of light deflectors;
A vehicular lamp characterized by comprising: A vehicular lamp that forms a predetermined light distribution pattern extending in a vertical direction and a horizontal direction,
A plurality of light sources that emit light;
A plurality of light deflection mirrors for reflecting a plurality of lights emitted from the plurality of light sources;
By deflecting the plurality of lights with the plurality of light deflection mirrors or changing the reflection direction of the plurality of lights by the plurality of light deflection mirrors, the plurality of lights are made to have a predetermined length or more in the left-right direction. A plurality of optical deflectors that scan in a scanning range having different lengths in the vertical direction;
An optical system for forming the predetermined light distribution pattern by a plurality of lights scanned by the plurality of light deflectors;
Control means for controlling driving of the plurality of light deflectors, and capable of changing a range of maximum illuminance in the left-right direction of the light scanned by the plurality of light deflectors;
A vehicular lamp characterized by comprising: The vehicular lamp according to claim 1 or 2,
When the control means increases the maximum illuminance of the light scanned by the plurality of optical deflectors, the scanning of the optical deflector having a narrower scanning range than the other of the plurality of optical deflectors is performed. A vehicular lamp characterized by being controlled to narrow the range. The vehicular lamp according to any one of claims 1 to 3,
The control means includes
By shifting the irradiation pattern of the plurality of lights scanned by the plurality of light deflectors in the left-right direction, the range of the maximum illuminance in the left-right direction of the light scanned by the plurality of light deflectors is changed,
Of the irradiation pattern shifted in the left-right direction, one end protruding from one end in the left-right direction of the range forming the predetermined light distribution pattern is deleted, and the other side of the irradiation pattern shifted in the left-right direction is deleted A vehicle lamp characterized in that a portion from the end to the other end of the range in which the predetermined light distribution pattern is formed is controlled to irradiate with the illuminance at the other side end of the irradiation pattern shifted in the left-right direction. . The vehicular lamp according to any one of claims 1 to 3,
The control means includes
By shifting the irradiation pattern of the plurality of lights scanned by the plurality of light deflectors in the left-right direction, the range of the maximum illuminance in the left-right direction of the light scanned by the plurality of light deflectors is changed,
Of the irradiation pattern shifted in the left-right direction, one end protruding from one end in the left-right direction of the range forming the predetermined light distribution pattern is deleted, and the other side of the irradiation pattern shifted in the left-right direction is deleted A vehicular lamp, wherein a portion from the end to the other end of the range where the predetermined light distribution pattern is formed is controlled so as not to emit light. In the vehicular lamp according to any one of claims 1 to 5,
Comprising storage means for storing a plurality of the predetermined light distribution patterns according to the traveling situation;
The vehicular lamp, wherein the control unit reads one of the plurality of predetermined light distribution patterns stored in the storage unit and performs control based on the read predetermined light distribution pattern.