JP2017130398A - Vehicle headlight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle headlight having a phosphor which emits light having a clear contour and achieving accurate coloring.SOLUTION: A vehicle headlight 1 has: an excitation light source 8; a phosphor 10; a scanning mechanism 11 which receives light of the excitation light source 8 and causes the received light to scan toward the phosphor 10; and a projection lens 12 which transmits an outgoing beam from the phosphor 10 to form a light distribution pattern La. The vehicle headlight 1 is provided with an opaque partition 41 which defines light receiving parts 42 of the phosphor 10 to form a light receiving part group 43.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vehicle headlamp having a phosphor that emits light having a clear outline and accurate color development.

  In Patent Document 1, light from a light source is condensed by a condensing optical system and then incident on a mirror of a scanning system, and reflected light from the mirror is light corresponding to a projection lens by a phosphorescent plate corresponding to a phosphor. An automotive certification system is disclosed that forms a light image by leading to an imaging system.

JP 2014-29858

  Since the light emitted from the phosphor (phosphorescent plate) in the automobile proof system of Patent Document 1 enters the optical image forming system while freely diffusing, it is formed in the automobile proof system of Patent Document 1. There is a possibility that the contour of the optical image to be unclear or a predetermined color development may not be obtained because the assumed light density cannot be obtained.

  In view of the above problems, the present application provides a vehicular headlamp having a phosphor that emits light with a clear outline and accurate color development.

  First, an excitation light source, a phosphor, a scanning mechanism that receives light from the excitation light source and scans the received light toward the phosphor, and transmits light emitted from the phosphor to form a light distribution pattern In the vehicular headlamp having the projection lens to be operated, an opaque body partition that defines a plurality of light receiving portions of the phosphor and forms a light receiving portion group is provided.

  (Operation) Light emitted from the scanning mechanism to the phosphor enters the projection lens while being emitted from the plurality of light receiving portions and condensed by the partitions.

  Further, in the vehicle headlamp, the partition is provided on at least one of the light emitting surface and the light incident surface of the light receiving portion of the phosphor.

  (Operation) A plurality of light receiving portions are defined without dividing the phosphor itself.

  Moreover, in the vehicle headlamp, the partition is formed of a plurality of continuous light collectors.

  (Operation) A concentrator is formed for each light receiving unit, and each concentrator as a partition collects light emitted from each light receiving unit and enters the projection lens.

  In the vehicle headlamp, the light receiving unit group includes a first light receiving unit group including a plurality of first light receiving units defined in the center of the phosphor by the partition, and the first light receiving unit group by the partition. A second light receiving unit group composed of a plurality of second light receiving units defined so as to be positioned on the outer periphery of the first light receiving unit, wherein the light output region of the first light receiving unit is the light output of the second light receiving unit It was made to be defined smaller than the area.

  (Operation) The light emitted from the plurality of first light receiving units toward the projection lens is further condensed than the light emitted from the plurality of second light receiving units toward the projection lens, and is emitted by the light emitted from the second light receiving unit. A light image is formed by the light emitted from the first light receiving unit with a clearer outline and higher brightness by the inner side of the light image.

  In the vehicle headlamp, the light incident surfaces of the plurality of light receiving portions partitioned by the partition each have a recess.

  (Operation) A part of the light incident on the light incident surface of the light receiving unit is reflected and reflected toward another position on the light incident surface of the same light receiving unit, that is, on the same reflecting surface of the same light receiving unit. Reflected light is diffused by being reflected a plurality of times.

  According to the vehicle headlamp, the light collected by each of the plurality of light receiving portions by the partition enters the projection lens, so that the contour of the light distribution pattern formed by the projection lens becomes clear, and accurate shading is achieved. As a result, accurate color development can be obtained in the light distribution pattern.

  In addition, according to the vehicle headlamp, a plurality of light receiving portions can be defined without physically dividing the phosphor itself along the partition, so that it is easy to manufacture the light receiving portion on the phosphor.

  Further, according to the vehicle headlamp, the light emitted from the plurality of light receiving parts is more accurately collected by forming the partition as a condenser, so that the light distribution pattern formed by the projection lens is reduced. Since the outline becomes clearer and more accurate shading is obtained, accurate color development can be obtained in the light distribution pattern.

  Moreover, according to the vehicle headlamp, a combined light distribution pattern is formed by two light images having different brightness. For example, the outer shape of the light distribution pattern is formed by the light image of the second light receiving unit group, and a hot spot of the light distribution pattern by the light image of the first light receiving unit group having higher brightness is formed inside the light distribution pattern.

  In addition, according to the vehicle headlamp, the regular reflection light is reduced by reflecting and diffusing the light a plurality of times at each reflecting portion, and uneven brightness is less likely to occur in the entire phosphor.

The front view of the vehicle headlamp of 1st and 2nd Example. Longitudinal sectional view of the vehicle headlamp of the first embodiment having a light-transmitting phosphor (cross sectional view taken along the line II in FIG. 1). (A) The perspective view which looked at the scanning mechanism from the front almost. (B) Explanatory drawing regarding the light distribution pattern for high beams by a vehicle headlamp. Vertical sectional view of a vehicle headlamp of a second embodiment having a reflective phosphor (A) The enlarged front view of the fluorescent substance of 1st and 2nd Example and a partition. (B) II-II sectional drawing of Fig.5 (a). (A) The enlarged front view which shows the 1st modification of the partition provided in the fluorescent substance of 1st and 2nd Example. (B) III-III sectional drawing of Fig.6 (a). (A) The enlarged front view which shows the 2nd modification of the partition provided in the fluorescent substance of 1st and 2nd Example. (B) IV-IV sectional drawing of Fig.7 (a). (A) The expanded longitudinal cross-sectional view which shows the 3rd modification of the fluorescent substance of 2nd Example. (B) VV sectional drawing of Fig.8 (a). (A) The enlarged front view which shows the 4th modification of the fluorescent substance of 2nd Example. (B) VI-VI sectional drawing of Fig.9 (a).

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In each figure, each direction of the vehicle headlamp will be described as (upper: lower: left: right: front: rear = Up: Lo: Le: Ri: Fr: Re).

  A vehicle headlamp 1 according to the first embodiment shown in FIGS. 1 and 2 is an example of a right headlamp having a light-transmitting phosphor, and includes a lamp body 2, a front cover 3, and the like. The headlamp unit 4 is provided. The lamp body 2 has an opening on the front side of the vehicle. The front cover 3 is formed of a light-transmitting resin, glass, or the like, and is attached to the opening of the lamp body 2 to form the lamp chamber S inside. The headlamp unit 4 shown in FIG. 1 is configured by integrating a high beam headlamp unit 5 and a low beam headlamp unit 6 with a metal support member 7 and is disposed inside the lamp chamber S. The

  The high beam headlamp unit 5 and the low beam headlamp unit 6 each have an excitation light source 8, a condensing lens 9, a phosphor 10, a scanning mechanism 11 and a projection lens 12 shown in FIG. It is attached to the support member 7. The support member 7 includes a plate-like bottom plate portion 7a extending in the horizontal direction, a lens support portion 7b extending forward from the tip of the bottom plate portion 7a, and a plate-like base plate portion 7c extending vertically from the base end of the bottom plate portion. Have.

  As shown in FIG. 2, the excitation light source 8 and the phosphor 10 are fixed to a metal bottom plate portion 7a. The scanning mechanism 11 is fixed to the front surface of the base plate portion 7c by the attachment portion 7d. The condenser lens 9 is fixed to either the bottom plate portion 7a or the base plate portion 7c. The projection lens 12 is fixed to the upper surface of the tip of the lens support portion 7b. The support member 7 of the headlamp unit 4 is supported so as to be tiltable with respect to the lamp body 2 by screwing three aiming screws 14 rotatably held by the lamp body 2 to the base plate portion 7c. Is done.

  The excitation light source 8 is composed of a blue or purple LED light source or a laser light source, and dissipates heat during lighting through a metal bottom plate portion 7a formed thicker than the base plate portion 7c. The condensing lens 9 and the projection lens 12 are transparent or semi-transparent plano-convex lenses having a convex light exit surface. The condensing lens 9 is fixed to the support member 7 so as to be disposed between the excitation light source 8 and the reflection surface 24 of the scanning mechanism 11, collects the light from the excitation light source 8 and makes it incident on the reflection surface 24. . The phosphor 10 is configured to generate white light based on the light from the excitation light source 8. When the excitation light source 8 is blue, the phosphor 10 is formed as a yellow phosphor, and when the excitation light source 8 is purple, the phosphor 10 is formed as a yellow and blue phosphor. . Further, the phosphor 10 is fixed to the bottom plate portion 7a via the frame body 7e so as to be disposed between the reflection surface 24 of the scanning mechanism 11 and the light incident surface 12b of the projection lens 12, and the blue color from the reflection surface 24 is obtained. Alternatively, the purple reflected light B1 is transmitted as white light W1 toward the projection lens. The projection lens 12 is disposed in the vicinity of the front end opening 13a of the extension reflector 13 provided in the lamp chamber S. The light that has passed through the phosphor 10 is transmitted toward the front cover 3.

  The scanning mechanism 11 shown in FIG. 3A is a scanning device having a reflecting mirror that can tilt in two axial directions. In this embodiment, a MEMS mirror is employed as an example, but the scanning mechanism 11 can employ various scanning mechanisms such as a galvanometer mirror. The scanning mechanism 11 includes a base 16, a first rotating body 17, a second rotating body 18, a pair of first torsion bars 19, a pair of second torsion bars 20, a pair of permanent magnets 21, a pair of permanent magnets 22, and a terminal portion. 23. A reflective surface 24 is formed on the front surface of the plate-like second rotating body 18 by a process such as silver vapor deposition or plating.

  The plate-like first rotating body 17 is supported by the base 16 in a state in which it can be tilted left and right by a pair of first torsion bars 19, and the second rotating body 18 is rotated up and down by a pair of second torsion bars 20. It is supported by the first rotating body 17 in a possible form. The pair of permanent magnets 21 and the pair of permanent magnets 22 are provided in the base 16 in the extending direction of the pair of first and second torsion bars (19, 20), respectively. The pair of first and second rotating bodies (18, 19) are provided with first and second coils (not shown) that are energized through the terminal portion 23, respectively. The first and second coils (not shown) are subjected to independent energization control by a control mechanism (not shown).

  The first rotating body 17 reciprocates around the axis of the first torsion bar 19 based on on / off of energization to a first coil (not shown), and the second rotating body 18 It reciprocates around the axis of the second torsion bar 20 based on the on / off of energization to (not shown). The reflecting surface 24 tilts up and down and left and right based on energization of a first or second coil (not shown), and scans the reflected light up and down and left and right toward the phosphor 10. The light that has passed through the phosphor passes through the projection lens 12 and the front cover 3 and displays a white light distribution pattern having a predetermined shape based on scanning in front of the vehicle.

  Here, as an example, a light distribution pattern displayed in front of the vehicle by scanning performed by the high beam headlamp unit 5 will be described with reference to FIG. Reference numeral S <b> 1 indicates the trajectory of the scanning line by the scanning mechanism 11. In the rectangular scanning area (reference numeral Sc1) in front of the vehicle, the scanning mechanism 11 in FIG. 3A scans from the left end S11 to the right end S12 by tilting the reflecting surface 24 as shown in FIG. 3B. After that, the reflecting surface 24 is tilted obliquely downward to the left toward the next left end S13 shifted downward by a minute distance d1 from the left end S11, and scanning to the right end S14 is repeated again at a high speed. In the position where the light distribution pattern is displayed, the excitation light source 8 is turned off in a section from P1 to P2 where the light distribution pattern is not displayed based on a lighting control device (not shown), and P2 which displays the high beam light distribution pattern La. Is turned on in the section from P3 to P3, and is turned off again in the section from P3 to P4 after the display is completed. The scanning mechanism 11 repeats the scanning downward at a high speed and displays the high beam light distribution pattern La in front of the vehicle by stacking line images vertically. The low beam headlamp unit 6 also displays a low beam light distribution pattern by performing similar scanning (not shown).

  The vehicle headlamp 31 shown in FIG. 4 is an example of a right headlamp having a light-reflecting phosphor 37, and the headlamp unit 32 is the headlamp unit of the first embodiment. In addition to being different from 4, it has the same configuration as the vehicular headlamp 1 of the first embodiment. The headlamp unit 32 of FIG. 4 is configured by integrating a high beam headlamp unit 33 and a low beam headlamp unit (not shown) with a metal support member 34. Placed in.

  The high beam headlamp unit 33 and the low beam headlamp unit (not shown) each have an excitation light source 35, a condenser lens 36, a phosphor 37, a scanning mechanism 38, and a projection lens 39 shown in FIG. All of these are attached to the support member 34. The support member 34 includes a plate-like bottom plate portion 34a that extends in the horizontal direction, a lens support portion 34b that extends upward from the tip of the bottom plate portion 34a and then bends forward, and a plate that extends in the vertical direction from the base end of the bottom plate portion 34a. Shaped base plate portion 34c. The base plate portion 34c is formed by a screw fixing portion 34d and a heat radiating portion 34e having a deeper front and back depth than the screw fixing portion 34d.

  As shown in FIG. 4, the excitation light source 35 and the phosphor 37 are fixed to the front surface of the heat radiating portion 34e of the support member 34, and the front surface of the phosphor 37a is a light incident surface and a light emitting surface. The heat generated in the excitation light source 35 during light emission and the heat generated in the phosphor 37 when receiving light having a high heat quantity such as laser light are radiated through the heat radiating portion 34e. When reflected, the scanning mechanism 38 is fixed to the phosphor 37 on the upper surface of the bottom plate portion 34a by the attachment portion 34f. The condenser lens 36 is fixed to either the bottom plate portion 34a or the base plate portion 34c. The projection lens 39 is fixed to the upper surface of the tip of the lens support portion 34b. The support member 34 of the headlamp unit 32 is supported so as to be tiltable with respect to the lamp body 2 by screwing the three aiming screws 14 rotatably held by the lamp body 2 to the screw fixing portion 34d. Is done.

  The excitation light source 35 in FIG. 4 is configured by a blue or purple LED light source or a laser light source. When the excitation light source 35 is blue, the phosphor 37 is formed as a yellow phosphor, and when the excitation light source 35 is purple, the phosphor 37 generates white light so that it is formed as a yellow and blue phosphor. Let The condensing lens 36 and the projection lens 39 are transparent or semi-transparent plano-convex lenses having a convex light exit surface. Similar to the scanning mechanism 11, the scanning mechanism 38 is formed as a scanning device having a reflecting mirror that can tilt in two axial directions.

  The projection lens 39 in FIG. 4 is fixed to the support member 34 so as to be disposed between the excitation light source 35 and the reflection surface 40 of the scanning mechanism 38, collects the light of the excitation light source 35 and enters the reflection surface 40. Let The scanning mechanism 38 performs scanning while reflecting the light from the excitation light source 35 toward the phosphor 37 by the reflecting surface 40. The phosphor 37 is fixed to the heat radiating portion 34 e of the support member 34, so that the phosphor 37 is disposed so as to face both the reflection surface 40 of the scanning mechanism 38 and the light incident surface 39 a of the projection lens 39. The blue or purple light B2 is reflected again to the projection lens 39 as white light W2. The projection lens 39 is disposed in the vicinity of the front end opening 13a of the extension reflector 13 provided in the lamp chamber S. The light reflected by the phosphor 37 is transmitted toward the front cover 3.

  Further, as shown in FIG. 5A, a partition 41 is provided on the light emitting surface 10a of the phosphor 10 of the first embodiment (the same applies to the phosphor 37 of the second embodiment). The partition 41 is formed in a lattice shape with an opaque resin or metal, and is integrated on the light emitting surface 10a of the phosphor 10 by adhesion or the like. The partition 41 is provided with a plurality of light receiving portions 42 having a square shape when viewed from the front side of the phosphor 10 by clearly dividing the phosphor 10 (in this embodiment, for example, 40 light receiving portions are provided. The light receiving unit group 43 is formed.

  Since the partition 41 is retrofitted to the light emitting surface 10a after the phosphor 10 is formed, the partition 41 is easily and inexpensively formed compared to being embedded at a predetermined position inside the phosphor 10. The partition 41 may be formed not on the light emitting surface 10a of the phosphor 10 but on the light incident surface 10b, or on both the light emitting surface 10a and the light incident surface 10b of the phosphor. Also good. In addition, the inner circumferential surface 41a of the partition 41 may be subjected to a mirror surface treatment such as silver deposition in order to reduce the diffusion of colliding light rays and improve the light collection rate (first deformation of the partition 41 described later). The same applies to the third to third modified examples).

  As shown in FIGS. 2 and 5 (b), the blue or violet light B1 reflected by the reflecting surface 24 of the scanning mechanism 11 is incident on the phosphor 10 from the light incident surface 10b, thereby combining blue and yellow. The light becomes white light W1 and is emitted forward from a plurality of light receiving portions 42 defined on the light emitting surface 10a. Further, the light that is diffused by being emitted from the light receiving unit 42 is reflected by the inner circumferential surface 41 of the partition 41 and condensed on the light incident surface 12 b of the projection lens 12, thereby entering the projection lens 12. According to the vehicle headlamp 1 of the first embodiment, the light W2 collected by the partition 41 for each of the plurality of light receiving portions 42 is incident on the projection lens 12, and thus the light distribution pattern formed by the projection lens 12 The outline of La (see FIG. 3B) becomes clear, and an accurate white color is obtained in the light distribution pattern La by obtaining an accurate shading.

  Moreover, Fig.6 (a) and (b) show the 1st modification of the partition 41 shown in each figure of FIG. The partitions 46 in FIGS. 6A and 6B are obtained by dividing a grid of 3 rows × 6 columns = 18 located in the central portion of the partition 41 into four equal parts. The partition 46 is also formed in a lattice shape with opaque resin or metal, and is integrated on the light emitting surface 10a of the phosphor 10 (the same applies to the phosphor 37 of the second embodiment) by bonding or the like. The partition 46 is provided with a plurality of first light receiving parts 47 (72 light receiving parts as an example in the present embodiment as an example in the center of the partition 46 by clearly dividing the phosphor 10. The number of the first light receiving unit group 48 is not limited to this, and a plurality of second light receiving units 49 formed so as to be positioned on the outer periphery of the first light receiving unit group 48 (in this embodiment, as an example, 22 Although the second light receiving unit is provided, the number of the second light receiving units is not limited to this, and the second light receiving unit group 50 is formed.

  The light emission area of the first light receiving part 47 is only ¼ of the light emission area of the second light receiving part 49. Therefore, the light passing through the first light receiving unit 47 shown in FIGS. 2 and 6B is more likely to come into contact with the grating inner peripheral surface (see reference numeral 47 a) than the light passing through the second light receiving unit 49. That is, the light passing through the first light receiving unit group 48 is more likely to be condensed toward the projection lens 12 than the light passing through the second light receiving unit group 50. Therefore, in the white light distribution pattern emitted from the phosphor 10 provided with the partition 46 and formed by the projection lens 12, it is further provided inside the light image whose outer shape is clearly formed by the second light receiving unit group 50. A light image, that is, a hot spot, is formed by the first light receiving unit group 48 having a clear outline and high brightness.

  FIGS. 7A and 7B show a second modification of the partition 41 shown in FIGS. 7 (a) and 7 (b) has a circular hole 54a in the center and a plurality of concentrators 54 each having a paraboloidal reflecting surface 54b arranged in the vertical and horizontal directions. It has an integrated shape. The partition 53 is also formed of an opaque resin, metal, or the like, and is integrated on the light emitting surface 10a of the phosphor 10 (the same applies to the phosphor 37 of the second embodiment) by bonding or the like. The partition 53 forms a light receiving unit group 56 including a plurality of light receiving units 55 and a plurality of light receiving units 55 by clearly dividing the phosphor 10 by a plurality of circular holes 54 a. In addition, it is desirable that the inner diameter of the circular hole 54a is substantially flush with the light emitting surface 10a of the phosphor by making the depth of the front and rear as thin as possible and approaching zero. In that case, in the light passing through the circular hole 54a, loss due to irregular reflection at the inner peripheral edge of the circular hole 54a is reduced. Further, it is desirable that the reflecting surface 54b be subjected to a mirror surface treatment such as silver deposition.

  As shown in FIG. 2 and FIG. 7B, the blue or purple light B1 reflected by the reflecting surface 24 of the scanning mechanism 11 enters the phosphor 10 from the light incident surface 10b, thereby combining blue and yellow. The light becomes white light W1 and is emitted forward from the plurality of light receiving portions 55 defined on the light emitting surface 10a by the plurality of circular holes 54a. Further, the light diffused by being emitted from the plurality of light receiving portions 55 is reflected on the reflection surface 54b on the inner periphery of the condenser 54 and condensed toward the light incident surface 12b of the projection lens 12, thereby projecting. The light enters the lens 12. According to the partition 53, the light collection pattern La formed by the projection lens 12 is further improved since the light collection accuracy of the light W2 toward the projection lens 12 is further improved by the plurality of condensers 54 (see FIG. 3B). As a result, the contour becomes clearer and accurate light and shade are obtained, so that a more accurate white color can be obtained in the light distribution pattern La.

  FIG. 8 shows a phosphor 61 which is a third modification of the reflective phosphor 37 in the second embodiment. In the phosphor 61 of FIG. 8, one phosphor 37 is used as a plurality of cylindrical phosphors 61, and the phosphor 61 is arranged inside the central circular hole 63 a of the plurality of collectors 63 that form the partitions 62. Is. The plurality of phosphors 61 are each formed as a light receiving part to constitute a light receiving part group 65. The partition 62 has a circular hole 63a in the center, and a plurality of concentrators 63 each having a paraboloidal reflecting surface 63b arranged in an up-down and left-right direction and integrated. The partition 62 is also formed of an opaque resin or metal. As shown in FIG. 8B, the plurality of phosphors 61 and the partition 62 are mounted on a metal base 64, and the base 64 is integrated with the front surface of the heat radiating portion 34e of the metal support member 34 by bonding or the like. Is done. The heat generated in each phosphor 61 when receiving light having a high heat quantity such as laser light is radiated through the metal base 64 and the heat radiating portion 34e.

  The blue or violet light B2 emitted from the excitation light source 35, which is the LED light source or laser light source of FIG. 4, and reflected by the reflecting surface 40 of the scanning mechanism 38 is fluorescent as shown in FIG. 8B. By entering the body 61, white light W <b> 2 composed of blue and yellow combined light is generated and reflected toward the projection lens 39 shown in FIG. 4. The light diffused at the time of reflection is reflected by the reflection surface 63b on the inner periphery of the condenser 63 and is condensed toward the light incident surface 39a of the projection lens 39, thereby passing through the projection lens 39 and further passing through the front cover. 3, a white high-beam light distribution pattern La having a clear outline and a precise color is formed.

  FIG. 9 shows a phosphor 71 which is a fourth modification of the reflective phosphor 37 in the second embodiment. The phosphor 71 shown in FIG. 9 is provided with a plurality of square-shaped regions as viewed from the front side of the phosphor 71 by providing a grid-like partition 72 as shown in FIG. A light receiving unit group 74 including the light receiving units 73 is formed. The partition 72 is formed in a lattice shape with an opaque resin or metal, and is integrated with the front surface of the phosphor 71 by adhesion or the like. The light incident surfaces of the plurality of light receiving portions 73 are each provided with a truncated cone-shaped recess 75 that is recessed rearward. The shape of the recess is not limited to the truncated cone shape as long as the incident light can be reflected a plurality of times in the recess, and may be a hemispherical shape. Further, it is desirable to form fine irregularities on the surface (light incident surface) of the concave portion 75 for the purpose of preventing luminance unevenness caused by the light incident on the concave portion 75 being reflected by the non-uniform body. In that case, the light incident on the recess 75 is reflected forward by the uniformly diffused body. Further, the inner circumferential surface 72a of the partition 72 may be subjected to mirror surface treatment such as silver deposition. The phosphor 71 is integrated with the front surface of the heat radiating portion 34e of the metal support member 34 shown in FIG. 4 by adhesion or the like, and the heat generated in the phosphor 71 is radiated through the heat radiating portion 34e.

  The blue or violet light B2 emitted from the excitation light source 35, which is the LED light source or laser light source of FIG. 4, and reflected by the reflecting surface 40 of the scanning mechanism 38, is fluorescent as shown in FIG. 9B. Incident into the plurality of light receiving portions 73 of the body 71. The light incident on the light receiving portion 73 is reflected a plurality of times inside the concave portion 75 to become white light W2 composed of blue and yellow combined light, and is reflected toward the projection lens 39 shown in FIG. Further, the light diffused at the time of reflection is reflected by the grating inner peripheral surface 72 a of the partition 72, and is condensed toward the light incident surface 39 a of the projection lens 39 to be transmitted through the projection lens 39. The light transmitted through the projection lens 39 and the front cover forms a white high beam light distribution pattern La.

DESCRIPTION OF SYMBOLS 1 Vehicle headlamp 8 Excitation light source 10 Phosphor 10a Light emission surface 10b Light incident surface 11 Scanning mechanism 12 Projection lens 31 Vehicle headlamp 35 Excitation light source 37 Phosphor 37a Light incident surface and light emission surface 38 Scanning mechanism 39 Projection lens 41 Partition 42 Light receiving portion 43 Light receiving portion group 47 First light receiving portion 48 First light receiving portion group 49 Second light receiving portion 50 Second light receiving portion group 53, 62 Partition 54, 63 Multiple light receivers forming partitions 72 Partition 73 Light receiving portion 75 Recessed portion La Light distribution pattern

Claims (5)

An excitation light source, a phosphor, a scanning mechanism that receives the light from the excitation light source and scans the received light toward the phosphor, and a projection lens that transmits light emitted from the phosphor to form a light distribution pattern In a vehicle headlamp having
A vehicular headlamp characterized by comprising a plurality of opaque body partitions that define a plurality of light receiving portions of the phosphor to form a light receiving portion group.   The vehicle headlamp according to claim 1, wherein the partition is provided on at least one of a light emitting surface and a light incident surface of a light receiving unit of the phosphor.   The vehicle headlamp according to claim 1, wherein the partition is composed of a plurality of continuous light collectors. The light receiving unit group is defined so as to be positioned on the outer periphery of the first light receiving unit group by a first light receiving unit group including a plurality of first light receiving units defined in the center of the phosphor by the partition. A second light receiving unit group consisting of a plurality of second light receiving units,
4. The vehicle headlamp according to claim 1, wherein a light emission region of the first light receiving unit is defined smaller than a light emission region of the second light receiving unit. 5. light.   The vehicular headlamp according to any one of claims 1 to 4, wherein the light incident surfaces of the plurality of light receiving portions partitioned by the partition each have a concave portion.

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