WO2019124188A1 - Vehicle headlight - Google Patents

Vehicle headlight Download PDF

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Publication number
WO2019124188A1
WO2019124188A1 PCT/JP2018/045678 JP2018045678W WO2019124188A1 WO 2019124188 A1 WO2019124188 A1 WO 2019124188A1 JP 2018045678 W JP2018045678 W JP 2018045678W WO 2019124188 A1 WO2019124188 A1 WO 2019124188A1
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WO
WIPO (PCT)
Prior art keywords
light emitting
lighting state
emitting element
lamp
light
Prior art date
Application number
PCT/JP2018/045678
Other languages
French (fr)
Japanese (ja)
Inventor
健 堀場
佐塚　清
有一 山本
Original Assignee
株式会社小糸製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Priority to CN201880081950.8A priority Critical patent/CN111556945A/en
Priority to JP2019561006A priority patent/JPWO2019124188A1/en
Publication of WO2019124188A1 publication Critical patent/WO2019124188A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings

Definitions

  • the present invention relates to a vehicle headlamp.
  • the light source for high beams etc. which illuminate a distant place rather than the said low beam other than the light source for low beams which illuminates the front at night is known.
  • the light from the high beam light source includes light emitted above the low beam.
  • Patent Document 1 shows a reflector unit having first and second light emitting elements arranged side by side in the front-rear direction, and a reflector for reflecting light emitted from the first and second light emitting elements forward.
  • a vehicle lamp comprising at least two of the above is disclosed.
  • the first light emitting element is a light source for low beam
  • the second light emitting element is a light source for high beam.
  • each of the reflector units of the vehicle lamp of Patent Document 1 one first light emitting element and one second light emitting element are mounted on one substrate.
  • the first light emitting elements of the respective reflector units are lit
  • the high beam is lit
  • the second light emitting elements of the respective reflector units are lit.
  • high light quantity is calculated
  • an object of this invention is to provide the headlight for vehicles which can irradiate the light of high light quantity and whose emitted-heat amount can be suppressed.
  • a vehicle headlamp includes three or more light emitting elements and a substrate on which the three or more light emitting elements are mounted in common, and the three or more light emitting elements Among the light emitting elements, a first lighting state in which a plurality of the light emitting elements are turned on and at least one of the light emitting elements is turned off, and a plurality of the light emitting elements of the three or more light emitting elements are turned on and at least one of the At least one of the plurality of light emitting elements which are switched to the second lighting state in which the light emitting elements are turned off and which are turned on in the first lighting state and the plurality of light emitting elements which are turned on in the second lighting state are the same
  • the light emitting element is characterized in that at least one other light emitting element is different from each other.
  • Different light distribution patterns may be formed by lighting different light emitting elements in the first lighting state and the second lighting state.
  • lighting the plurality of light emitting elements in each of the first lighting state and the second lighting state it is possible to emit light with a high light amount.
  • the calorific value can be suppressed as compared with the case where all the light emitting elements mounted on the substrate are simultaneously lit. As described above, according to the vehicular headlamp, it is possible to emit light of high light quantity and to suppress the amount of heat generation.
  • the number of the light emitting elements lit in the first lighting state and the number of the light emitting elements lit in the second lighting state are the same.
  • the heat generation amount from the light emitting elements can be easily equalized in the first lighting state and the second lighting state by the same number of light emitting elements in the first lighting state and the second lighting state. Design can be easier.
  • the first lighting state is a high beam lighting state
  • the second lighting state is a low beam lighting state
  • one lamp can irradiate the high beam and the low beam.
  • the first lighting state is a high beam lighting state
  • the second lighting state is a cornering lamp lighting state.
  • one lamp can irradiate the high beam and the cornering lamp.
  • the vehicle headlamp includes four or more of the light emitting elements mounted on the substrate, and the first lighting state, the second lighting state, the first lighting state, and the second lighting. It is preferable to switch to a third lighting state in which a plurality of the light emitting elements including the light emitting element which is turned off in the state are turned on and at least one light emitting element is turned off.
  • one lamp can be provided with three functions.
  • a heat sink is further provided to transmit heat from the substrate.
  • the amount of heat generation can be suppressed as compared with the case where all the light emitting elements mounted on the substrate are lighted at the same time as described above.
  • the heat sink can be miniaturized.
  • a vehicular headlamp capable of emitting light of high light quantity and suppressing the amount of heat generation.
  • FIG. 2 is a horizontal cross-sectional view of one lamp taken along line II-II in FIG.
  • FIG. 3 is a vertical sectional view of one lamp taken along line III-III in FIG.
  • FIG. 4A shows a light distribution pattern in the first lighting state in the first embodiment
  • FIG. 4B shows a light distribution pattern in the second lighting state in the first embodiment.
  • FIG. 6 (A) shows a light distribution pattern in the first lighting state in the second embodiment
  • FIG. 6 (B) shows a light distribution pattern in the second lighting state in the second embodiment.
  • FIG. 1 is a front view showing an outline of a vehicle provided with a vehicle headlamp according to a first embodiment of the present invention.
  • a vehicle 100 is provided with a pair of vehicular headlamps 1 in each of front left and right directions.
  • a pair of vehicular headlamps 1 provided in the vehicle 100 are symmetrical in the left-right direction.
  • a plurality of lamps 1a, 1b and 1c are arranged side by side, the lamps 1a are arranged on the outermost side of the vehicle 100, and the lamps 1c are on the most center side of the vehicle 100.
  • the lamp 1b is disposed between the lamp 1a and the lamp 1c.
  • the lamp 1a is a lamp for high beam and cornering lamps. Further, at least one of the lamp 1b and the lamp 1c may have a function as a low beam lamp, and the other may have the same configuration as the lamp 1a or may be configured differently.
  • the lamp 1 a which is a part of the vehicle headlamp 1 includes a housing 10 and a lamp unit LUa housed in the housing 10.
  • the lamp unit LUa is a lamp unit having the functions of a high beam and a cornering lamp.
  • the housing 10 mainly includes a lamp housing 11, a front cover 12, and a back cover 13.
  • the front of the lamp housing 11 is open, and the front cover 12 is fixed to the lamp housing 11 so as to close the opening. Further, an opening smaller than the front is formed at the rear of the lamp housing 11, and the back cover 13 is fixed to the lamp housing 11 so as to close the opening.
  • a space formed by the lamp housing 11, the front cover 12 closing the opening in the front of the lamp housing 11, and the back cover 13 closing the opening in the rear of the lamp housing 11 is a lamp chamber LR.
  • the lamp unit LUa is housed inside.
  • the lamp unit LUa mainly includes a support member 30, a reflector 20, a substrate 40, a first light emitting element 41, a second light emitting element 42, a third light emitting element 43, and a heat sink 50.
  • the support member 30 is a metal member, and includes a top plate 31, a back plate 32, and a locking portion 33.
  • the top plate 31 is a generally horizontally extending plate-like metal member
  • the back plate 32 is a generally vertically extending plate-like metal member.
  • the rear end of the top plate 31 and the upper end of the back plate 32 are connected to each other. Further, in the vicinity of the upper end of the back plate 32, a locking portion 33 is connected.
  • the locking portion 33 extends rearward from the back plate 32, and the locking portion 33 is formed with a screw hole opening rearward.
  • a screw 35 is screwed into the screw hole from the outside of the lamp housing 11, and the locking portion 33 is fixed to the lamp housing 11.
  • a screw hole is also formed on the lower side of the back plate 32, and a screw 34 is screwed into the screw hole from the outside of the lamp housing 11, and the back plate 32 is fixed to the lamp housing 11.
  • the back plate 32 is fixed in the lamp chamber LR in a substantially vertical state
  • the top plate 31 connected to the back plate 32 is also fixed in the lamp chamber LR.
  • the angle of the back plate 32 can be finely adjusted by adjusting these screws 34 and 35, and the angle of the top plate 31 can be finely adjusted accordingly.
  • the reflector 20 is fixed to the lower surface of the top plate 31.
  • the reflector 20 has a reflector body 24 and a plating unit 23.
  • the reflector body 24 is made of resin.
  • the plating unit 23 is a thin film formed of a metal such as aluminum or a metal oxide on the front surface of the reflector body 24.
  • the surface of the plating unit 23 is a light reflecting surface 23r.
  • the reflecting surface 23r has, for example, a concave shape formed of a free-form surface based on a parabola whose opening direction is on the front side.
  • the shape of the cross section in the vertical direction of the reflective surface 23r is substantially lower than the vertex when the central axis of the parabola is horizontal, and the shape of the cross section in the horizontal direction of the reflective surface 23r is Generally, the shape includes the apex of the parabola.
  • the parabola in the cross section of the reflective surface 23r in the vertical direction and the parabola in the cross section in the horizontal direction may be different parabola.
  • the shape of the reflection surface 23r in the cross section in the horizontal direction may not be based on a parabola, and may be, for example, a shape based on a part of an ellipse or another concave shape.
  • the substrate 40 is disposed on the lower surface of the top plate 31, and the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 are mounted on the substrate 40.
  • Each of the first light emitting element 41 and the second light emitting element 42 of the present embodiment emits light which is a part of the high beam.
  • the second light emitting element 42 and the third light emitting element 43 of the present embodiment respectively emit light which is a part of the cornering lamp.
  • the first light emitting element 41 and the second light emitting element 42 are disposed side by side in the front-rear direction, and the first light emitting element 41 is disposed in front of the second light emitting element 42.
  • the second light emitting element 42 and the third light emitting element 43 are arranged side by side in the left-right direction, and the third light emitting element 43 is disposed closer to the center of the vehicle 100 than the second light emitting element 42 when the vehicle 100 is viewed from the front. Be done.
  • the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 are, for example, LEDs (Light Emitting Diodes).
  • the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 are mounted on one substrate 40 and connected to a light emission control circuit (not shown) provided on the substrate 40.
  • the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 can emit light by power feeding from the light emission control circuit provided on the substrate 40, respectively. Therefore, the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 are controlled to be turned on or off by the light emission control circuit.
  • the heat sink 50 of the present embodiment is formed on the top surface of the top plate 31.
  • the heat sink 50 may be a part of the top plate 31 or may be provided separately from the top plate 31.
  • the heat generated by the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 is transmitted to the heat sink 50 via the substrate 40 and the top plate 31, and is dissipated at the heat sink 50.
  • the first light emitting state in which the first light emitting element 41 and the second light emitting element 42 are lighted and the third light emitting element 43 is extinguished, and the second light emitting element 42 and the third light emitting element 43 are lighted. At the same time, it is switched to the second lighting state in which the first light emitting element 41 is turned off.
  • FIG. 4A shows a light distribution pattern in the first lighting state of the present embodiment
  • FIG. 4B shows a light distribution pattern in the second lighting state of the present embodiment.
  • the first lighting state is the high beam lighting state
  • the second lighting state is the cornering lamp lighting state.
  • the first lighting state of the present embodiment is the high beam lighting state.
  • the high beam of the present embodiment is irradiated by the light L41 from the first light emitting element 41 and the light L42 from the second light emitting element.
  • most of the light L41 emitted from the first light emitting element 41 and the light L42 emitted from the second light emitting element 42 are reflected by the reflecting surface 23r, and the light L41 is reflected after being reflected by the reflecting surface 23r. It is irradiated above L42.
  • the light distribution pattern of the high beam shown in FIG. 4A is formed by the lights L41 and L42.
  • the light distribution pattern of the high beam is formed by the lamps 1 a provided on the left and right of the vehicle 100.
  • the second lighting state of the present embodiment is the cornering lamp lighting state.
  • the cornering lamp is turned on in conjunction with the operation of the turn signal lamp and the steering of the vehicle 100.
  • the cornering lamp of this embodiment is irradiated with the light L42 from the second light emitting element 42 and the light L43 from the third light emitting element 43.
  • the light L43 is the light L43 when the vehicle 100 is viewed from the front. After being reflected by the reflecting surface 23r, the light L is emitted to the outside of the vehicle 100 more than the light L42.
  • the light distribution pattern of the cornering lamp shown in FIG. 4 (B) is formed by the lights L42 and L43.
  • the light distribution pattern of the cornering lamp is formed by the lamp 1a provided on the left side when looking at the vehicle 100 from the front when the vehicle 100 turns to the right, and the vehicle 100 is displayed when the vehicle 100 turns to the left. It is formed by the lamp 1a provided on the right side when viewed from the front.
  • the vehicle headlamp 1 includes the first light emitting element 41, the second light emitting element 42, the third light emitting element 43, and the substrate 40 on which the light emitting elements are mounted.
  • the vehicle headlamp 1 of the present embodiment includes the three or more light emitting elements, and the substrate 40 on which the three or more light emitting elements are mounted in common.
  • the vehicle headlamp 1 of the present embodiment is switched between the first lighting state and the second lighting state.
  • the first lighting state is a state in which a plurality of light emitting elements of three or more light emitting elements are turned on and at least one light emitting element is turned off.
  • the second lighting state is a state in which a plurality of light emitting elements of the three or more light emitting elements are turned on and at least one light emitting element is turned off.
  • at least one of the plurality of light emitting elements which are lit in the first lighting state and the plurality of light emitting elements which are lit in the second lighting state are the same light emitting element.
  • the second light emitting element 42 is lit in the first lighting state and the second lighting state.
  • at least one of the plurality of light emitting elements which are lit in the first lighting state and the plurality of light emitting elements which are lit in the second lighting state are light emitting elements which are different from each other.
  • the first light emitting element 41 is lit in the first lighting state and is extinguished in the second lighting state
  • the third light emitting element 43 is lit in the second lighting state and is the first Turn off with the light on.
  • the vehicular headlamp 1 of the present embodiment can emit light of a high light amount. Furthermore, by turning off at least one light emitting element in each of the first lighting state and the second lighting state, the amount of heat generation can be suppressed as compared with the case where all the light emitting elements mounted on the substrate 40 are simultaneously lit. . As described above, according to the vehicle headlamp 1 of the present embodiment, it is possible to emit light of a high light quantity and to suppress the amount of heat generation.
  • two light emitting elements are lit in each of the first lighting state and the second lighting state.
  • the heat generation from the light emitting elements in the first lighting state and the second lighting state Designs for heat dissipation may be easier because they are easier to match.
  • the first lighting state is set to the high beam lighting state
  • the second lighting state is set to the cornering lamp lighting state. Can be irradiated.
  • the light distribution pattern of the high beam or cornering lamp may be complemented by the light from the other lamps 1b and 1c.
  • the heat sink 50 to which the heat from the substrate 40 is transmitted is provided.
  • the amount of heat generation can be suppressed as compared with the case where all the light emitting elements mounted on one substrate 40 are lighted at the same time as described above.
  • the heat sink 50 can be miniaturized.
  • the heat sink 50 may be a single plate made of metal such as aluminum.
  • FIG. 5 is a view schematically showing a horizontal direction cross section of a lamp according to a second embodiment of the present invention.
  • FIG. 5 is a view showing a horizontal cross section of the lamp 1 a according to the present embodiment from the same viewpoint as FIG. 2.
  • the lamp 1a of this embodiment differs from the first embodiment in that it is a lamp for low beam and high beam.
  • the lamp 1b and the lamp 1c of the present embodiment may have the same configuration as the lamp 1a, or may have different configurations.
  • the second light emitting element 42 and the third light emitting element 43 are arranged in the left-right direction, and the first light emitting element 41 is disposed in front of the second light emitting element 42 and the third light emitting element 43. Further, the second light emitting element 42 and the third light emitting element 43 are respectively disposed in the vicinity of the focal point of a parabola based on the cross-sectional shape in the vertical direction of the reflecting surface 23r.
  • the lamp 1 a shown in FIG. 5 is a lamp 1 a provided on the left side of the vehicle 100 when the vehicle 100 is viewed from the front. In the lamp 1a provided on the right side of the vehicle 100 when the vehicle 100 is viewed from the front, the arrangement of the second light emitting element 42 and the third light emitting element 43 is opposite to the left and right of the lamp 1a shown in FIG.
  • the first light emitting state in which the first light emitting element 41 and the second light emitting element 42 are lighted and the third light emitting element 43 is extinguished, and the second light emitting element 42 and the third light emitting element 43 are lighted. At the same time, it is switched to the second lighting state in which the first light emitting element 41 is turned off.
  • FIG. 6A shows a light distribution pattern in the first lighting state of the present embodiment
  • FIG. 6B shows a light distribution pattern in the second lighting state of the present embodiment.
  • the first lighting state is the high beam lighting state
  • the second lighting state is the low beam lighting state.
  • the first lighting state of the present embodiment is the high beam lighting state
  • the light distribution pattern formed in the first lighting state of the present embodiment is the first light emission state of the first embodiment as shown in FIG. It is the same as 1 lighting state.
  • the second lighting state of the present embodiment is the low beam lighting state.
  • the low beam of the present embodiment is irradiated by the light L42 from the second light emitting element 42 and the light L43 from the third light emitting element 43.
  • most of the light L42 emitted from the second light emitting element 42 and the light L43 emitted from the third light emitting element 43 are reflected by the reflecting surface 23r.
  • the light emitted from the region on the foremost side in the light emitting part of the second light emitting element 42 and the third light emitting element 43 has a low beam cut line shown in FIG. Form.
  • the second light emitting element 42 and the third light emitting element 43 are disposed in the vicinity of the focal point of a parabola based on the cross-sectional shape in the vertical direction of the reflecting surface 23r. Therefore, the light emitted from the same region in the emission part of the second light emitting element 42 and the third light emitting element 43 is substantially parallel light after reflection even if it is reflected by any part of the reflecting surface 23 r.
  • the light distribution pattern of the low beam shown in FIG. 6B is formed.
  • the light distribution pattern of the low beam may be formed by the lamps 1 a provided on the left and right of the vehicle 100 and may be complemented by light from the other lamps 1 b and 1 c.
  • FIG. 7 is a view schematically showing a horizontal direction cross section of a lamp according to a third embodiment of the present invention.
  • FIG. 7 is a view showing a horizontal cross section of the lamp 1 a according to the present embodiment from the same viewpoint as FIG. 2.
  • the lamp 1a of this embodiment differs from the first and second embodiments in that it is a lamp for high beam, low beam, and cornering lamps.
  • the lamp 1b and the lamp 1c of the present embodiment may have the same configuration as the lamp 1a, or may have different configurations.
  • the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 are arranged in the same manner as the second embodiment, and the third light emitting element 43 is viewed when the vehicle 100 is viewed from the front.
  • the fourth light emitting element 44 is provided closer to the center of the vehicle 100 than it is.
  • Such a lamp 1 a shown in FIG. 7 is a lamp 1 a provided on the left side of the vehicle 100 when the vehicle 100 is viewed from the front.
  • the arrangement of the second light emitting element 42, the third light emitting element 43, and the fourth light emitting element 44 is opposite to the left and right of the lamp 1a shown in FIG. It is assumed.
  • the lamp 1 a according to the present embodiment is switched to the first lighting state, the second lighting state, and the third lighting state.
  • the first light emitting element 41 and the second light emitting element 42 are turned on and the third light emitting element 43 and the fourth light emitting element 44 are turned off to be in a high beam lighting state.
  • the second light emitting element 42 and the third light emitting element 43 are turned on and the first light emitting element 41 and the fourth light emitting element 44 are turned off to be in the low beam lighting state.
  • the lamp 1a according to the present embodiment includes four light emitting elements mounted on the substrate 40, and can be switched between the first lighting state, the second lighting state, and the third lighting state. By switching the lamp 1 a to the first lighting state, the second lighting state, and the third lighting state, the lamp 1 a can be provided with three functions.
  • the lamp 1 a may be configured to be switched to three or more lighting states.
  • the third lighting state is a plurality of light emitting elements including light emitting elements that are extinguished in the first lighting state and the second lighting state.
  • at least one light emitting element is turned off while it is turned on.
  • the light emitting element lit in the third lighting state includes at least one light emitting element lit in the first lighting state or the second lighting state.
  • the number of light emitting elements mounted on the substrate 40 is not particularly limited as long as it is three or more, and the number and arrangement of the light emitting elements can be appropriately selected according to the function required for the lamp 1a.
  • the first lighting state may be the low beam lighting state
  • the second lighting state may be the cornering lamp lighting state.
  • the first light emitting element 41 can be removed from the lamp 1 a of the third embodiment.
  • the number of lamps is not particularly limited. When multiple lamps are provided, the position of each lamp is not particularly limited. Therefore, for example, in the above embodiment, the lamp 1a may be disposed on the most central side of the vehicle 100.
  • the reflector 20 includes the first light emitting element 41, It may be provided above the second light emitting element 42 and the third light emitting element 43. In this case, the positional relationship between the light emitting elements in the front-rear direction is reversed to that in the above embodiment.
  • the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 may be a laser light source or another light source.
  • the lamp used for a lighting is not limited to the said form.
  • the lamp used for the vehicle headlamp according to the present invention is a projector type lamp in which light emitted from the light emitting element is emitted through the convex lens, or a direct lens type in which light from the light emitting element is emitted directly through the lens Or the like.
  • a vehicular headlamp includes a plurality of lamps, at least one lamp having the same configuration as the lamp 1a of the first embodiment, and at least one other lamp is the same as the lamp 1a of the second embodiment. It may be configured.
  • the present invention it is possible to provide a vehicular headlamp capable of suppressing the amount of heat generation.
  • the said vehicle headlamp can be utilized in the field
  • SYMBOLS 1 Vehicle headlamp 1a, 1b, 1c ... Lamp 10 ... Housing

Abstract

A vehicle headlight (1) is provided with three or more light-emitting elements and a substrate (40) on which the three or more light-emitting elements are mounted together, and is switched between: a first turning-on state in which, among the three or more light-emitting elements, multiple light-emitting elements are turned on and at least one light-emitting element is turned off; and a second turning-on state in which, among the three or more light-emitting elements, multiple light-emitting elements are turned on and at least one light-emitting element is turned off. Regarding the multiple light-emitting elements that are turned on in the first turning-on state and the multiple light-emitting elements that are turned on in the second turning-on state, at least one of the former and one of the latter are the same light-emitting element, and at least another one of the former and another one of the latter are light-emitting elements that are different from each other.

Description

車両用前照灯Vehicle headlights
　本発明は、車両用前照灯に関する。 The present invention relates to a vehicle headlamp.
　自動車用ヘッドライトに代表される車両用前照灯として、夜間に前方を照らすロービーム用の光源の他に、当該ロービームよりも遠方を照らすハイビーム用の光源等を搭載したものが知られている。ハイビーム用の光源からの光は、ロービームよりも上方に照射される光を含んでいる。 As a vehicle headlamp represented by the headlight for motor vehicles, what mounted the light source for high beams etc. which illuminate a distant place rather than the said low beam other than the light source for low beams which illuminates the front at night is known. The light from the high beam light source includes light emitted above the low beam.
　例えば下記特許文献１には、前後方向に並んで配置された第１および第２発光素子と、これら第１および第２発光素子からの出射光を前方へ向けて反射させるリフレクタとを有するリフレクタユニットを少なくとも二つ備えた車両用灯具が開示されている。当該車両用灯具では、第１発光素子がロービーム用の光源とされ、第２発光素子がハイビーム用の光源とされる。 For example, Patent Document 1 below shows a reflector unit having first and second light emitting elements arranged side by side in the front-rear direction, and a reflector for reflecting light emitted from the first and second light emitting elements forward. A vehicle lamp comprising at least two of the above is disclosed. In the vehicle lamp, the first light emitting element is a light source for low beam, and the second light emitting element is a light source for high beam.
特開２０１６－７２０１７号公報JP, 2016-72017, A
　上記特許文献１の車両用灯具のそれぞれのリフレクタユニットには、１つの第１発光素子と１つの第２発光素子とが１つの基板に実装されている。そして、ロービーム点灯時にはそれぞれのリフレクタユニットの第１発光素子が点灯され、ハイビーム点灯時にはそれぞれのリフレクタユニットの第２発光素子が点灯される。ところで、車両用前照灯には、高い光量が求められる。そのため、上記特許文献１の車両用灯具のようにそれぞれのリフレクタユニットにおいて１つの発光素子のみが点灯される場合、必要とされる光量の光を照射するためには、複数のリフレクタユニットが必要となる場合がある。一方、１つのリフレクタユニットから出射する光の光量を増やす場合、１つの基板に実装される発光素子の数を増やすとともに、それらの発光素子を同時に点灯させることが考えられる。しかし、１つの基板上に実装される複数の発光素子が全て同時に点灯すると発光素子が発する総熱量が大きくなり過ぎるという懸念がある。 In each of the reflector units of the vehicle lamp of Patent Document 1, one first light emitting element and one second light emitting element are mounted on one substrate. When the low beam is lit, the first light emitting elements of the respective reflector units are lit, and when the high beam is lit, the second light emitting elements of the respective reflector units are lit. By the way, high light quantity is calculated | required by the headlight for vehicles. Therefore, when only one light emitting element is turned on in each reflector unit as in the vehicle lamp of Patent Document 1, a plurality of reflector units are required to emit light of the required light quantity. May be On the other hand, when increasing the light quantity of the light radiate | emitted from one reflector unit, while increasing the number of the light emitting elements mounted in one board | substrate, it is possible to make those light emitting elements light simultaneously. However, there is a concern that the total amount of heat generated by the light emitting elements becomes too large when all of the plurality of light emitting elements mounted on one substrate light up simultaneously.
　そこで、本発明は、高い光量の光を照射し得ると共に発熱量が抑制され得る車両用前照灯を提供することを目的とする。 Then, an object of this invention is to provide the headlight for vehicles which can irradiate the light of high light quantity and whose emitted-heat amount can be suppressed.
　上記課題を解決するため、本発明の車両用前照灯は、３つ以上の発光素子と、前記３つ以上の発光素子が共通して実装される基板と、を備え、前記３つ以上の発光素子のうち複数の前記発光素子が点灯すると共に少なくとも一つの前記発光素子が消灯する第１点灯状態と、前記３つ以上の発光素子のうち複数の前記発光素子が点灯すると共に少なくとも一つの前記発光素子が消灯する第２点灯状態と、に切り替えられ、前記第１点灯状態において点灯する前記複数の発光素子と前記第２点灯状態において点灯する前記複数の発光素子とは、少なくとも１つが同じ前記発光素子であり、他の少なくとも１つが互いに異なる前記発光素子であることを特徴とする。 In order to solve the above problems, a vehicle headlamp according to the present invention includes three or more light emitting elements and a substrate on which the three or more light emitting elements are mounted in common, and the three or more light emitting elements Among the light emitting elements, a first lighting state in which a plurality of the light emitting elements are turned on and at least one of the light emitting elements is turned off, and a plurality of the light emitting elements of the three or more light emitting elements are turned on and at least one of the At least one of the plurality of light emitting elements which are switched to the second lighting state in which the light emitting elements are turned off and which are turned on in the first lighting state and the plurality of light emitting elements which are turned on in the second lighting state are the same The light emitting element is characterized in that at least one other light emitting element is different from each other.
　第１点灯状態と第２点灯状態とでは、互いに異なる発光素子が点灯することによって、互いに異なる配光パターンが形成され得る。また、第１点灯状態及び第２点灯状態のそれぞれにおいて複数の発光素子が点灯されることによって、高い光量の光を照射し得る。さらに、第１点灯状態及び第２点灯状態のそれぞれにおいて少なくとも１つの発光素子が消灯することによって、基板に実装されている全ての発光素子が同時に点灯する場合に比べて発熱量が抑制され得る。このように車両用前照灯によれば、高い光量の光を照射し得ると共に発熱量が抑制され得る。 Different light distribution patterns may be formed by lighting different light emitting elements in the first lighting state and the second lighting state. In addition, by lighting the plurality of light emitting elements in each of the first lighting state and the second lighting state, it is possible to emit light with a high light amount. Furthermore, by turning off at least one light emitting element in each of the first lighting state and the second lighting state, the calorific value can be suppressed as compared with the case where all the light emitting elements mounted on the substrate are simultaneously lit. As described above, according to the vehicular headlamp, it is possible to emit light of high light quantity and to suppress the amount of heat generation.
　また、前記第１点灯状態において点灯する前記発光素子の数と前記第２点灯状態において点灯する前記発光素子の数とが同じであることが好ましい。 Moreover, it is preferable that the number of the light emitting elements lit in the first lighting state and the number of the light emitting elements lit in the second lighting state are the same.
　第１点灯状態と第２点灯状態とで点灯する発光素子の数が同じであることによって、第１点灯状態と第２点灯状態とで発光素子からの発熱量を揃え易くなるため、放熱のための設計が容易になり得る。 The heat generation amount from the light emitting elements can be easily equalized in the first lighting state and the second lighting state by the same number of light emitting elements in the first lighting state and the second lighting state. Design can be easier.
　また、前記第１点灯状態はハイビーム点灯状態であり、前記第２点灯状態はロービーム点灯状態であることが好ましい。 Preferably, the first lighting state is a high beam lighting state, and the second lighting state is a low beam lighting state.
　第１点灯状態がハイビーム点灯状態とされ、第２点灯状態がロービーム点灯状態とされることによって、１つの灯具によってハイビームとロービームとを照射し得る。 By setting the first lighting state to the high beam lighting state and the second lighting state to the low beam lighting state, one lamp can irradiate the high beam and the low beam.
　また、前記第１点灯状態はハイビーム点灯状態であり、前記第２点灯状態はコーナリングランプ点灯状態であることも好ましい。 Preferably, the first lighting state is a high beam lighting state, and the second lighting state is a cornering lamp lighting state.
　第１点灯状態がハイビーム点灯状態とされ、第２点灯状態がコーナリングランプ点灯状態とされることによって、１つの灯具によってハイビームとコーナリングランプとを照射し得る。 By setting the first lighting state to the high beam lighting state and the second lighting state to the cornering lamp lighting state, one lamp can irradiate the high beam and the cornering lamp.
　また、上記車両用前照灯は、前記基板に実装される４つ以上の前記発光素子を備え、前記第１点灯状態と、前記第２点灯状態と、前記第１点灯状態及び前記第２点灯状態において消灯する前記発光素子を含む複数の前記発光素子が点灯すると共に少なくとも１つの前記発光素子が消灯する第３点灯状態と、に切り替えられることが好ましい。 In addition, the vehicle headlamp includes four or more of the light emitting elements mounted on the substrate, and the first lighting state, the second lighting state, the first lighting state, and the second lighting. It is preferable to switch to a third lighting state in which a plurality of the light emitting elements including the light emitting element which is turned off in the state are turned on and at least one light emitting element is turned off.
　このように、第１点灯状態、第２点灯状態及び第３点灯状態に切り替えられることによって、１つの灯具に３つの機能を備えさせることができる。 Thus, by switching between the first lighting state, the second lighting state, and the third lighting state, one lamp can be provided with three functions.
　また、前記基板からの熱が伝播するヒートシンクが更に備えられることが好ましい。 In addition, it is preferable that a heat sink is further provided to transmit heat from the substrate.
　本発明の車両用前照灯によれば、上記のように基板に実装される全ての発光素子が同時に点灯する場合に比べて発熱量が抑制され得る。よって、基板からの熱が伝播するヒートシンクが用いられる場合、当該ヒートシンクを小型化し得る。 According to the vehicle headlamp of the present invention, the amount of heat generation can be suppressed as compared with the case where all the light emitting elements mounted on the substrate are lighted at the same time as described above. Thus, if a heat sink is used to transfer heat from the substrate, the heat sink can be miniaturized.
　以上のように、本発明によれば、高い光量の光を照射し得ると共に発熱量が抑制され得る車両用前照灯が提供される。 As described above, according to the present invention, there is provided a vehicular headlamp capable of emitting light of high light quantity and suppressing the amount of heat generation.
本発明の第１実施形態における車両用前照灯を備える車両の概略を示す正面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the outline of a vehicle provided with the vehicle headlamp in 1st Embodiment of this invention. 図１のII－II線における１つの灯具の水平方向の断面図である。FIG. 2 is a horizontal cross-sectional view of one lamp taken along line II-II in FIG. 図１のIII－III線における１つの灯具の鉛直方向の断面図である。FIG. 3 is a vertical sectional view of one lamp taken along line III-III in FIG. 図４（Ａ）は第１実施形態における第１点灯状態の配光パターンを示し、図４（Ｂ）は第１実施形態における第２点灯状態の配光パターンを示す。FIG. 4A shows a light distribution pattern in the first lighting state in the first embodiment, and FIG. 4B shows a light distribution pattern in the second lighting state in the first embodiment. 本発明の第２実施形態における灯具の水平方向断面の概略を示す図である。It is a figure which shows the outline of the horizontal direction cross section of the lamp in 2nd Embodiment of this invention. 図６（Ａ）は第２実施形態における第１点灯状態の配光パターンを示し、図６（Ｂ）は第２実施形態における第２点灯状態の配光パターンを示す。FIG. 6 (A) shows a light distribution pattern in the first lighting state in the second embodiment, and FIG. 6 (B) shows a light distribution pattern in the second lighting state in the second embodiment. 本発明の第３実施形態における灯具の水平方向断面の概略を示す図である。It is a figure which shows the outline of the horizontal direction cross section of the lamp in 3rd Embodiment of this invention.
　以下、本発明に係る車両用前照灯を実施するための形態が添付図面とともに例示される。以下に例示する実施形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。本発明は、その趣旨を逸脱することなく、以下の実施形態から変更、改良することができる。 Hereinafter, a mode for carrying out a vehicle headlamp according to the present invention will be exemplified together with the attached drawings. The embodiments exemplified below are for the purpose of facilitating the understanding of the present invention, and are not for the purpose of limiting the present invention. The present invention can be modified or improved from the following embodiments without departing from the gist thereof.
（第１実施形態）
　図１は、本発明の第１実施形態における車両用前照灯を備える車両の概略を示す正面図である。図１に示すように車両１００は、前方の左右方向のそれぞれに一対の車両用前照灯１を備える。車両１００に備わる一対の車両用前照灯１は、互いに左右方向に対称な形状とされる。本実施形態の車両用前照灯１は、複数の灯具１ａ，１ｂ，１ｃが互いに横並びに並べられており、灯具１ａが車両１００の最も外側に配置され、灯具１ｃが車両１００の最も中心側に配置され、灯具１ｂが灯具１ａと灯具１ｃとの間に配置される。本実施形態では、以下に説明するように、灯具１ａはハイビーム及びコーナリングランプ用の灯具とされる。また、灯具１ｂ及び灯具１ｃは、少なくとも一方がロービーム用の灯具としての機能を有し、他方は灯具１ａと同じ構成とされても良く、異なる構成とされても良い。 First Embodiment
FIG. 1 is a front view showing an outline of a vehicle provided with a vehicle headlamp according to a first embodiment of the present invention. As shown in FIG. 1, a vehicle 100 is provided with a pair of vehicular headlamps 1 in each of front left and right directions. A pair of vehicular headlamps 1 provided in the vehicle 100 are symmetrical in the left-right direction. In the vehicle headlamp 1 of the present embodiment, a plurality of lamps 1a, 1b and 1c are arranged side by side, the lamps 1a are arranged on the outermost side of the vehicle 100, and the lamps 1c are on the most center side of the vehicle 100. The lamp 1b is disposed between the lamp 1a and the lamp 1c. In the present embodiment, as described below, the lamp 1a is a lamp for high beam and cornering lamps. Further, at least one of the lamp 1b and the lamp 1c may have a function as a low beam lamp, and the other may have the same configuration as the lamp 1a or may be configured differently.
　図２は図１のII－II線に沿った面から見上げる水平方向の断面図であり、図３は図１のIII－III線における鉛直方向の断面図である。すなわち、図２は灯具１ａの上部における水平方向の断面図であり、図３は灯具１ａの左右方向の略中央における鉛直方向の断面図である。図２、図３に示すように車両用前照灯１の一部である灯具１ａは、筐体１０と、当該筐体１０内に収容される灯具ユニットＬＵａとを備える。本実施形態において灯具ユニットＬＵａは、ハイビームとコーナリングランプとの機能を有する灯具ユニットとされる。 2 is a horizontal sectional view looking up from the plane along the line II-II of FIG. 1, and FIG. 3 is a vertical sectional view along the line III-III of FIG. That is, FIG. 2 is a horizontal cross-sectional view of the upper portion of the lamp 1a, and FIG. 3 is a vertical cross-sectional view of a substantially central portion of the lamp 1a in the left-right direction. As shown in FIGS. 2 and 3, the lamp 1 a which is a part of the vehicle headlamp 1 includes a housing 10 and a lamp unit LUa housed in the housing 10. In the present embodiment, the lamp unit LUa is a lamp unit having the functions of a high beam and a cornering lamp.
　筐体１０は、ランプハウジング１１、フロントカバー１２及びバックカバー１３を主な構成として備える。ランプハウジング１１の前方は開口しており、当該開口を塞ぐようにフロントカバー１２がランプハウジング１１に固定されている。また、ランプハウジング１１の後方には前方よりも小さな開口が形成されており、当該開口を塞ぐようにバックカバー１３がランプハウジング１１に固定されている。 The housing 10 mainly includes a lamp housing 11, a front cover 12, and a back cover 13. The front of the lamp housing 11 is open, and the front cover 12 is fixed to the lamp housing 11 so as to close the opening. Further, an opening smaller than the front is formed at the rear of the lamp housing 11, and the back cover 13 is fixed to the lamp housing 11 so as to close the opening.
　ランプハウジング１１と、当該ランプハウジング１１の前方の開口を塞ぐフロントカバー１２と、当該ランプハウジング１１の後方の開口を塞ぐバックカバー１３とによって形成される空間は灯室ＬＲであり、この灯室ＬＲ内に灯具ユニットＬＵａが収容されている。 A space formed by the lamp housing 11, the front cover 12 closing the opening in the front of the lamp housing 11, and the back cover 13 closing the opening in the rear of the lamp housing 11 is a lamp chamber LR. The lamp unit LUa is housed inside.
　灯具ユニットＬＵａは、支持部材３０、リフレクタ２０、基板４０、第１発光素子４１、第２発光素子４２、第３発光素子４３、及びヒートシンク５０を主な構成として備える。 The lamp unit LUa mainly includes a support member 30, a reflector 20, a substrate 40, a first light emitting element 41, a second light emitting element 42, a third light emitting element 43, and a heat sink 50.
　支持部材３０は金属製の部材であり、トッププレート３１と、バックプレート３２と、係止部３３とを有する。トッププレート３１は概ね水平に延在する板状の金属部材であり、バックプレート３２は概ね鉛直に延在する板状の金属部材である。トッププレート３１の後端とバックプレート３２の上端は互いに接続されている。また、バックプレート３２の上端近傍には、係止部３３が接続されている。係止部３３はバックプレート３２から後方に向かって延在しており、係止部３３には後方側に開口するねじ孔が形成されている。このねじ孔にはランプハウジング１１の外側からねじ３５が螺入され、係止部３３がランプハウジング１１に固定されている。また、バックプレート３２の下方側にもねじ孔が形成されており、このねじ孔にはランプハウジング１１の外側からねじ３４が螺入されバックプレート３２はランプハウジング１１に固定されている。こうしてバックプレート３２は、概ね鉛直な状態で灯室ＬＲ内に固定され、バックプレート３２に接続されるトッププレート３１も灯室ＬＲ内に固定されている。なお、これらのねじ３４，３５が調整されることで、バックプレート３２の角度を微調整することができ、これに伴いトッププレート３１の角度を微調整することができる。 The support member 30 is a metal member, and includes a top plate 31, a back plate 32, and a locking portion 33. The top plate 31 is a generally horizontally extending plate-like metal member, and the back plate 32 is a generally vertically extending plate-like metal member. The rear end of the top plate 31 and the upper end of the back plate 32 are connected to each other. Further, in the vicinity of the upper end of the back plate 32, a locking portion 33 is connected. The locking portion 33 extends rearward from the back plate 32, and the locking portion 33 is formed with a screw hole opening rearward. A screw 35 is screwed into the screw hole from the outside of the lamp housing 11, and the locking portion 33 is fixed to the lamp housing 11. Further, a screw hole is also formed on the lower side of the back plate 32, and a screw 34 is screwed into the screw hole from the outside of the lamp housing 11, and the back plate 32 is fixed to the lamp housing 11. Thus, the back plate 32 is fixed in the lamp chamber LR in a substantially vertical state, and the top plate 31 connected to the back plate 32 is also fixed in the lamp chamber LR. The angle of the back plate 32 can be finely adjusted by adjusting these screws 34 and 35, and the angle of the top plate 31 can be finely adjusted accordingly.
　リフレクタ２０は、トッププレート３１の下面に固定されている。リフレクタ２０はリフレクタ本体部２４及びめっき部２３を有する。リフレクタ本体部２４は樹脂から成る。めっき部２３は、リフレクタ本体部２４の前方側の面上において、アルミニウム等の金属や金属酸化物によって構成される薄膜である。このめっき部２３の表面は、光の反射面２３ｒとされる。反射面２３ｒは、例えば、開口方向が前方側とされる放物線を基調とする自由曲面から成る凹状の形状とされる。より具体的には、反射面２３ｒの鉛直方向の断面における形状は、概ね放物線の中心軸を水平にする場合の頂点よりも下側の形状とされ、反射面２３ｒの水平方向の断面における形状は、概ね放物線の頂点を含む形状とされる。ただし、反射面２３ｒの鉛直方向の断面における放物線と、水平方向の断面における放物線とは互いに異なる放物線とされても良い。また、水平方向の断面における反射面２３ｒの形状は、放物線を基調としなくても良く、例えば楕円の一部を基調とする形状や他の凹状の形状とされても良い。 The reflector 20 is fixed to the lower surface of the top plate 31. The reflector 20 has a reflector body 24 and a plating unit 23. The reflector body 24 is made of resin. The plating unit 23 is a thin film formed of a metal such as aluminum or a metal oxide on the front surface of the reflector body 24. The surface of the plating unit 23 is a light reflecting surface 23r. The reflecting surface 23r has, for example, a concave shape formed of a free-form surface based on a parabola whose opening direction is on the front side. More specifically, the shape of the cross section in the vertical direction of the reflective surface 23r is substantially lower than the vertex when the central axis of the parabola is horizontal, and the shape of the cross section in the horizontal direction of the reflective surface 23r is Generally, the shape includes the apex of the parabola. However, the parabola in the cross section of the reflective surface 23r in the vertical direction and the parabola in the cross section in the horizontal direction may be different parabola. The shape of the reflection surface 23r in the cross section in the horizontal direction may not be based on a parabola, and may be, for example, a shape based on a part of an ellipse or another concave shape.
　また、トッププレート３１の下面には、基板４０が配置され、基板４０には第１発光素子４１、第２発光素子４２、及び第３発光素子４３が実装される。本実施形態の第１発光素子４１及び第２発光素子４２はそれぞれハイビームの一部となる光を出射する。また、本実施形態の第２発光素子４２及び第３発光素子４３はそれぞれコーナリングランプの一部となる光を出射する。第１発光素子４１及び第２発光素子４２は前後方向に並んで配置され、第１発光素子４１は第２発光素子４２よりも前方に配置される。また、第２発光素子４２及び第３発光素子４３は左右方向に並んで配置され、車両１００を正面から見る場合に第３発光素子４３は第２発光素子４２よりも車両１００の中心側に配置される。 Further, the substrate 40 is disposed on the lower surface of the top plate 31, and the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 are mounted on the substrate 40. Each of the first light emitting element 41 and the second light emitting element 42 of the present embodiment emits light which is a part of the high beam. Further, the second light emitting element 42 and the third light emitting element 43 of the present embodiment respectively emit light which is a part of the cornering lamp. The first light emitting element 41 and the second light emitting element 42 are disposed side by side in the front-rear direction, and the first light emitting element 41 is disposed in front of the second light emitting element 42. In addition, the second light emitting element 42 and the third light emitting element 43 are arranged side by side in the left-right direction, and the third light emitting element 43 is disposed closer to the center of the vehicle 100 than the second light emitting element 42 when the vehicle 100 is viewed from the front. Be done.
　第１発光素子４１、第２発光素子４２、及び第３発光素子４３は、例えばそれぞれＬＥＤ（Light Emitting Diode）とされる。第１発光素子４１、第２発光素子４２、及び第３発光素子４３は、１つの基板４０に実装され、基板４０に設けられる不図示の発光制御回路に接続されている。第１発光素子４１、第２発光素子４２、及び第３発光素子４３は、それぞれ基板４０に設けられる発光制御回路からの給電により光を出射することができる。よって、第１発光素子４１、第２発光素子４２、及び第３発光素子４３は、それぞれ発光制御回路によって点灯または消灯の制御がなされる。 The first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 are, for example, LEDs (Light Emitting Diodes). The first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 are mounted on one substrate 40 and connected to a light emission control circuit (not shown) provided on the substrate 40. The first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 can emit light by power feeding from the light emission control circuit provided on the substrate 40, respectively. Therefore, the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 are controlled to be turned on or off by the light emission control circuit.
　本実施形態のヒートシンク５０は、トッププレート３１の上面に形成される。ヒートシンク５０は、トッププレート３１の一部とされてもよく、トッププレート３１とは別に設けられてもよい。第１発光素子４１、第２発光素子４２、及び第３発光素子４３が発する熱は、基板４０及びトッププレート３１を介してヒートシンク５０へと伝播し、ヒートシンク５０において放熱される。 The heat sink 50 of the present embodiment is formed on the top surface of the top plate 31. The heat sink 50 may be a part of the top plate 31 or may be provided separately from the top plate 31. The heat generated by the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 is transmitted to the heat sink 50 via the substrate 40 and the top plate 31, and is dissipated at the heat sink 50.
　次に本実施形態の車両用前照灯１の動作及び作用効果について説明する。 Next, the operation and effects of the vehicle headlamp 1 of the present embodiment will be described.
　本実施形態の灯具１ａは、第１発光素子４１及び第２発光素子４２が点灯すると共に第３発光素子４３が消灯する第１点灯状態と、第２発光素子４２及び第３発光素子４３が点灯すると共に第１発光素子４１が消灯する第２点灯状態と、に切り替えられる。 In the lamp 1a of this embodiment, the first light emitting state in which the first light emitting element 41 and the second light emitting element 42 are lighted and the third light emitting element 43 is extinguished, and the second light emitting element 42 and the third light emitting element 43 are lighted. At the same time, it is switched to the second lighting state in which the first light emitting element 41 is turned off.
　図４（Ａ）は本実施形態の第１点灯状態の配光パターンを示し、図４（Ｂ）は本実施形態の第２点灯状態の配光パターンを示す。本実施形態の灯具１ａにおいて、第１点灯状態はハイビーム点灯状態であり、第２点灯状態はコーナリングランプ点灯状態である。 FIG. 4A shows a light distribution pattern in the first lighting state of the present embodiment, and FIG. 4B shows a light distribution pattern in the second lighting state of the present embodiment. In the lamp 1a according to this embodiment, the first lighting state is the high beam lighting state, and the second lighting state is the cornering lamp lighting state.
　上記の通り、本実施形態の第１点灯状態は、ハイビーム点灯状態である。本実施形態のハイビームは、第１発光素子４１からの光Ｌ４１及び第２発光素子４２からの光Ｌ４２により照射される。図３に示すように、第１発光素子４１から出射する光Ｌ４１及び第２発光素子４２から出射する光Ｌ４２の多くは反射面２３ｒで反射され、光Ｌ４１は反射面２３ｒで反射された後に光Ｌ４２よりも上方に照射される。こうして、光Ｌ４１，Ｌ４２によって図４（Ａ）に示すハイビームの配光パターンが形成される。なお、ハイビームの配光パターンは、車両１００の左右に備えられる灯具１ａによって形成される。 As described above, the first lighting state of the present embodiment is the high beam lighting state. The high beam of the present embodiment is irradiated by the light L41 from the first light emitting element 41 and the light L42 from the second light emitting element. As shown in FIG. 3, most of the light L41 emitted from the first light emitting element 41 and the light L42 emitted from the second light emitting element 42 are reflected by the reflecting surface 23r, and the light L41 is reflected after being reflected by the reflecting surface 23r. It is irradiated above L42. Thus, the light distribution pattern of the high beam shown in FIG. 4A is formed by the lights L41 and L42. The light distribution pattern of the high beam is formed by the lamps 1 a provided on the left and right of the vehicle 100.
　また、上記の通り、本実施形態の第２点灯状態は、コーナリングランプ点灯状態である。コーナリングランプはターンシグナルランプや車両１００のステアリングの操作と連動して点灯される。本実施形態のコーナリングランプは、第２発光素子４２からの光Ｌ４２及び第３発光素子４３からの光Ｌ４３により照射される。図２に示すように、第２発光素子４２から出射する光Ｌ４２及び第３発光素子４３から出射する光Ｌ４３の多くは反射面２３ｒで反射され、車両１００を正面から見る場合に、光Ｌ４３は反射面２３ｒで反射された後に光Ｌ４２よりも車両１００の外側に照射される。こうして、光Ｌ４２，Ｌ４３によって図４（Ｂ）に示すコーナリングランプの配光パターンが形成される。なお、コーナリングランプの配光パターンは、車両１００が右側に旋回する場合には車両１００を正面から見て左側に備えられる灯具１ａによって形成され、車両１００が左側に旋回する場合には車両１００を正面から見て右側に備えられる灯具１ａによって形成される。 Further, as described above, the second lighting state of the present embodiment is the cornering lamp lighting state. The cornering lamp is turned on in conjunction with the operation of the turn signal lamp and the steering of the vehicle 100. The cornering lamp of this embodiment is irradiated with the light L42 from the second light emitting element 42 and the light L43 from the third light emitting element 43. As shown in FIG. 2, when the light L42 emitted from the second light emitting element 42 and the light L43 emitted from the third light emitting element 43 are mostly reflected by the reflection surface 23r, the light L43 is the light L43 when the vehicle 100 is viewed from the front. After being reflected by the reflecting surface 23r, the light L is emitted to the outside of the vehicle 100 more than the light L42. Thus, the light distribution pattern of the cornering lamp shown in FIG. 4 (B) is formed by the lights L42 and L43. The light distribution pattern of the cornering lamp is formed by the lamp 1a provided on the left side when looking at the vehicle 100 from the front when the vehicle 100 turns to the right, and the vehicle 100 is displayed when the vehicle 100 turns to the left. It is formed by the lamp 1a provided on the right side when viewed from the front.
　以上説明したように、本実施形態の車両用前照灯１は、第１発光素子４１、第２発光素子４２及び第３発光素子４３と、これらの発光素子が実装される基板４０と、を備える。すなわち、本実施形態の車両用前照灯１は、３つ以上の発光素子と、３つ以上の発光素子が共通して実装される基板４０と、を備える。また、本実施形態の車両用前照灯１は、第１点灯状態と第２点灯状態とに切り替えられる。第１点灯状態は、３つ以上の発光素子のうち複数の発光素子が点灯すると共に少なくとも一つの発光素子が消灯する状態である。また、第２点灯状態は、３つ以上の発光素子のうち複数の発光素子が点灯すると共に少なくとも一つの発光素子が消灯する状態である。ただし、第１点灯状態において点灯する複数の発光素子と第２点灯状態において点灯する複数の発光素子とは、少なくとも１つが同じ発光素子である。本実施形態の車両用前照灯１では、上記のように、第１点灯状態及び第２点灯状態において第２発光素子４２が点灯する。また、第１点灯状態において点灯する複数の発光素子と第２点灯状態において点灯する複数の発光素子とは、少なくとも１つが互いに異なる発光素子である。本実施形態の車両用前照灯１では、第１発光素子４１は第１点灯状態で点灯して第２点灯状態で消灯し、第３発光素子４３は第２点灯状態で点灯して第１点灯状態で消灯する。 As described above, the vehicle headlamp 1 according to the present embodiment includes the first light emitting element 41, the second light emitting element 42, the third light emitting element 43, and the substrate 40 on which the light emitting elements are mounted. Prepare. That is, the vehicle headlamp 1 of the present embodiment includes the three or more light emitting elements, and the substrate 40 on which the three or more light emitting elements are mounted in common. Further, the vehicle headlamp 1 of the present embodiment is switched between the first lighting state and the second lighting state. The first lighting state is a state in which a plurality of light emitting elements of three or more light emitting elements are turned on and at least one light emitting element is turned off. The second lighting state is a state in which a plurality of light emitting elements of the three or more light emitting elements are turned on and at least one light emitting element is turned off. However, at least one of the plurality of light emitting elements which are lit in the first lighting state and the plurality of light emitting elements which are lit in the second lighting state are the same light emitting element. As described above, in the vehicle headlamp 1 of the present embodiment, the second light emitting element 42 is lit in the first lighting state and the second lighting state. In addition, at least one of the plurality of light emitting elements which are lit in the first lighting state and the plurality of light emitting elements which are lit in the second lighting state are light emitting elements which are different from each other. In the vehicle headlamp 1 of the present embodiment, the first light emitting element 41 is lit in the first lighting state and is extinguished in the second lighting state, and the third light emitting element 43 is lit in the second lighting state and is the first Turn off with the light on.
　上記のように第１点灯状態と第２点灯状態とでは、互いに異なる発光素子が点灯すると共に互いに異なる発光素子が消灯する。よって、第１点灯状態と第２点灯状態とでは、互いに異なる配光パターンが形成され得る。また、第１点灯状態及び第２点灯状態のそれぞれにおいて複数の発光素子が点灯されることによって、本実施形態の車両用前照灯１は高い光量の光を照射し得る。さらに、第１点灯状態及び第２点灯状態のそれぞれにおいて少なくとも１つの発光素子が消灯することによって、基板４０に実装されている全ての発光素子が同時に点灯する場合に比べて発熱量が抑制され得る。このように本実施形態の車両用前照灯１によれば、高い光量の光を照射し得ると共に発熱量が抑制され得る。 As described above, in the first lighting state and the second lighting state, the different light emitting elements are turned on and the different light emitting elements are turned off. Therefore, light distribution patterns different from each other can be formed in the first lighting state and the second lighting state. Further, by lighting the plurality of light emitting elements in each of the first lighting state and the second lighting state, the vehicular headlamp 1 of the present embodiment can emit light of a high light amount. Furthermore, by turning off at least one light emitting element in each of the first lighting state and the second lighting state, the amount of heat generation can be suppressed as compared with the case where all the light emitting elements mounted on the substrate 40 are simultaneously lit. . As described above, according to the vehicle headlamp 1 of the present embodiment, it is possible to emit light of a high light quantity and to suppress the amount of heat generation.
　また、本実施形態の車両用前照灯１では、第１点灯状態及び第２点灯状態において、それぞれ２つの発光素子が点灯する。このように第１点灯状態において点灯する発光素子の数と第２点灯状態において点灯する発光素子の数とが同じであることによって、第１点灯状態と第２点灯状態とで発光素子からの発熱量を揃え易くなるため、放熱のための設計が容易になり得る。 Further, in the vehicle headlamp 1 of the present embodiment, two light emitting elements are lit in each of the first lighting state and the second lighting state. As described above, since the number of light emitting elements lit in the first lighting state is the same as the number of light emitting elements lit in the second lighting state, the heat generation from the light emitting elements in the first lighting state and the second lighting state Designs for heat dissipation may be easier because they are easier to match.
　また、本実施形態の車両用前照灯１では、第１点灯状態がハイビーム点灯状態とされ、第２点灯状態がコーナリングランプ点灯状態とされることによって、１つの灯具１ａによってハイビームとコーナリングランプとを照射し得る。ただし、他の灯具１ｂ、１ｃからの光によってハイビームまたはコーナリングランプの配光パターンが補完されてもよい。 Further, in the vehicle headlamp 1 of the present embodiment, the first lighting state is set to the high beam lighting state, and the second lighting state is set to the cornering lamp lighting state. Can be irradiated. However, the light distribution pattern of the high beam or cornering lamp may be complemented by the light from the other lamps 1b and 1c.
　また、本実施形態の車両用前照灯１では、基板４０からの熱が伝播するヒートシンク５０が備えられる。本実施形態の車両用前照灯１によれば、上記のように１つの基板４０に実装される全ての発光素子が同時に点灯する場合に比べて発熱量が抑制され得る。よって、ヒートシンク５０を小型化し得る。例えば、ヒートシンク５０は、アルミニウム等の金属からなる一枚の板とされてもよい。 Moreover, in the vehicle headlamp 1 of the present embodiment, the heat sink 50 to which the heat from the substrate 40 is transmitted is provided. According to the vehicle headlamp 1 of the present embodiment, the amount of heat generation can be suppressed as compared with the case where all the light emitting elements mounted on one substrate 40 are lighted at the same time as described above. Thus, the heat sink 50 can be miniaturized. For example, the heat sink 50 may be a single plate made of metal such as aluminum.
（第２実施形態）
　次に、本発明の第２実施形態について図面を参照して詳細に説明する。なお、第１実施形態と同一または同等の構成要素については、特に説明する場合を除き、同一の参照符号を付して重複する説明は省略する。 Second Embodiment
Next, a second embodiment of the present invention will be described in detail with reference to the drawings. In addition, about the component the same as that of 1st Embodiment, or equivalent, except in the case where it demonstrates especially, the same referential mark is attached | subjected and the overlapping description is abbreviate | omitted.
　図５は、本発明の第２実施形態における灯具の水平方向断面の概略を示す図である。図５は、図２と同様の視点で本実施形態にかかる灯具１ａの水平方向断面を示す図である。 FIG. 5 is a view schematically showing a horizontal direction cross section of a lamp according to a second embodiment of the present invention. FIG. 5 is a view showing a horizontal cross section of the lamp 1 a according to the present embodiment from the same viewpoint as FIG. 2.
　本実施形態の灯具１ａは、ロービーム及びハイビーム用の灯具とされる点において上記第１実施形態と異なる。また、本実施形態の灯具１ｂ及び灯具１ｃは、それぞれ灯具１ａと同じ構成とされても良く、異なる構成とされても良い。 The lamp 1a of this embodiment differs from the first embodiment in that it is a lamp for low beam and high beam. In addition, the lamp 1b and the lamp 1c of the present embodiment may have the same configuration as the lamp 1a, or may have different configurations.
　本実施形態の灯具１ａでは、第２発光素子４２及び第３発光素子４３が左右方向に並べられ、第１発光素子４１は第２発光素子４２及び第３発光素子４３の前方に配置される。また、第２発光素子４２及び第３発光素子４３はそれぞれ反射面２３ｒの鉛直方向の断面形状が基調とする放物線の焦点近傍に配置される。なお、図５に示す灯具１ａは、車両１００を正面から見て車両１００の左側に備えられる灯具１ａである。車両１００を正面から見て車両１００の右側に備えられる灯具１ａでは、図５に示す灯具１ａに対して第２発光素子４２及び第３発光素子４３の配置が左右反対とされる。 In the lamp 1 a of the present embodiment, the second light emitting element 42 and the third light emitting element 43 are arranged in the left-right direction, and the first light emitting element 41 is disposed in front of the second light emitting element 42 and the third light emitting element 43. Further, the second light emitting element 42 and the third light emitting element 43 are respectively disposed in the vicinity of the focal point of a parabola based on the cross-sectional shape in the vertical direction of the reflecting surface 23r. The lamp 1 a shown in FIG. 5 is a lamp 1 a provided on the left side of the vehicle 100 when the vehicle 100 is viewed from the front. In the lamp 1a provided on the right side of the vehicle 100 when the vehicle 100 is viewed from the front, the arrangement of the second light emitting element 42 and the third light emitting element 43 is opposite to the left and right of the lamp 1a shown in FIG.
　次に本実施形態の車両用前照灯１の動作及び作用効果について説明する。 Next, the operation and effects of the vehicle headlamp 1 of the present embodiment will be described.
　本実施形態の灯具１ａは、第１発光素子４１及び第２発光素子４２が点灯すると共に第３発光素子４３が消灯する第１点灯状態と、第２発光素子４２及び第３発光素子４３が点灯すると共に第１発光素子４１が消灯する第２点灯状態と、に切り替えられる。 In the lamp 1a of this embodiment, the first light emitting state in which the first light emitting element 41 and the second light emitting element 42 are lighted and the third light emitting element 43 is extinguished, and the second light emitting element 42 and the third light emitting element 43 are lighted. At the same time, it is switched to the second lighting state in which the first light emitting element 41 is turned off.
　図６（Ａ）は本実施形態の第１点灯状態の配光パターンを示し、図６（Ｂ）は本実施形態の第２点灯状態の配光パターンを示す。本実施形態の灯具１ａにおいて、第１点灯状態はハイビーム点灯状態であり、第２点灯状態はロービーム点灯状態である。 FIG. 6A shows a light distribution pattern in the first lighting state of the present embodiment, and FIG. 6B shows a light distribution pattern in the second lighting state of the present embodiment. In the lamp 1a of the present embodiment, the first lighting state is the high beam lighting state, and the second lighting state is the low beam lighting state.
　上記の通り本実施形態の第１点灯状態はハイビーム点灯状態であり、本実施形態の第１点灯状態で形成される配光パターンは、図６（Ａ）に示す通り上記第１実施形態の第１点灯状態と同様である。 As described above, the first lighting state of the present embodiment is the high beam lighting state, and the light distribution pattern formed in the first lighting state of the present embodiment is the first light emission state of the first embodiment as shown in FIG. It is the same as 1 lighting state.
　また、上記の通り、本実施形態の第２点灯状態は、ロービーム点灯状態である。本実施形態のロービームは、第２発光素子４２からの光Ｌ４２及び第３発光素子４３からの光Ｌ４３により照射される。図５に示すように、第２発光素子４２から出射する光Ｌ４２及び第３発光素子４３から出射する光Ｌ４３の多くは反射面２３ｒで反射される。このように照射される光Ｌ４２，Ｌ４３のうち第２発光素子４２及び第３発光素子４３の出射部における最も前方側の領域から出射する光が、図６（Ｂ）に示すロービームのカットラインを形成する。また、第２発光素子４２及び第３発光素子４３は、上記のように反射面２３ｒの鉛直方向の断面形状が基調とする放物線の焦点近傍に配置されている。そのため、第２発光素子４２及び第３発光素子４３の出射部における同じ領域から出射した光は、反射面２３ｒのどの部分で反射しても、反射後に互いに概ね平行光とされる。こうして、図６（Ｂ）に示すロービームの配光パターンが形成される。なお、ロービームの配光パターンは、車両１００の左右に備えられる灯具１ａによって形成され、他の灯具１ｂ、１ｃからの光によって補完されてもよい。 Further, as described above, the second lighting state of the present embodiment is the low beam lighting state. The low beam of the present embodiment is irradiated by the light L42 from the second light emitting element 42 and the light L43 from the third light emitting element 43. As shown in FIG. 5, most of the light L42 emitted from the second light emitting element 42 and the light L43 emitted from the third light emitting element 43 are reflected by the reflecting surface 23r. Of the lights L42 and L43 irradiated in this manner, the light emitted from the region on the foremost side in the light emitting part of the second light emitting element 42 and the third light emitting element 43 has a low beam cut line shown in FIG. Form. Further, as described above, the second light emitting element 42 and the third light emitting element 43 are disposed in the vicinity of the focal point of a parabola based on the cross-sectional shape in the vertical direction of the reflecting surface 23r. Therefore, the light emitted from the same region in the emission part of the second light emitting element 42 and the third light emitting element 43 is substantially parallel light after reflection even if it is reflected by any part of the reflecting surface 23 r. Thus, the light distribution pattern of the low beam shown in FIG. 6B is formed. The light distribution pattern of the low beam may be formed by the lamps 1 a provided on the left and right of the vehicle 100 and may be complemented by light from the other lamps 1 b and 1 c.
（第３実施形態）
　次に、本発明の第３実施形態について図面を参照して詳細に説明する。なお、第１実施形態または第２実施形態と同一または同等の構成要素については、特に説明する場合を除き、同一の参照符号を付して重複する説明は省略する。 Third Embodiment
Next, a third embodiment of the present invention will be described in detail with reference to the drawings. In addition, about the component the same as that of 1st Embodiment or 2nd Embodiment, or equivalent, the same referential mark is attached and the overlapping description is abbreviate | omitted except the case where it demonstrates in particular.
　図７は、本発明の第３実施形態における灯具の水平方向断面の概略を示す図である。図７は、図２と同様の視点で本実施形態にかかる灯具１ａの水平方向断面を示す図である。 FIG. 7 is a view schematically showing a horizontal direction cross section of a lamp according to a third embodiment of the present invention. FIG. 7 is a view showing a horizontal cross section of the lamp 1 a according to the present embodiment from the same viewpoint as FIG. 2.
　本実施形態の灯具１ａは、ハイビーム、ロービーム、及びコーナリングランプ用の灯具とされる点において上記第１実施形態及び第２実施形態と異なる。また、本実施形態の灯具１ｂ及び灯具１ｃは、それぞれ灯具１ａと同じ構成とされても良く、異なる構成とされても良い。 The lamp 1a of this embodiment differs from the first and second embodiments in that it is a lamp for high beam, low beam, and cornering lamps. In addition, the lamp 1b and the lamp 1c of the present embodiment may have the same configuration as the lamp 1a, or may have different configurations.
　本実施形態の灯具１ａでは、第１発光素子４１、第２発光素子４２及び第３発光素子４３が上記第２実施形態と同様に配置され、車両１００を正面から見る場合に第３発光素子４３よりも車両１００の中心側に第４発光素子４４が備えられる。図７に示すこのような灯具１ａは、車両１００を正面から見て車両１００の左側に備えられる灯具１ａである。車両１００を正面から見て車両１００の右側に備えられる灯具１ａでは、図７に示す灯具１ａに対して第２発光素子４２、第３発光素子４３、及び第４発光素子４４の配置が左右反対とされる。 In the lamp 1a of the present embodiment, the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 are arranged in the same manner as the second embodiment, and the third light emitting element 43 is viewed when the vehicle 100 is viewed from the front. The fourth light emitting element 44 is provided closer to the center of the vehicle 100 than it is. Such a lamp 1 a shown in FIG. 7 is a lamp 1 a provided on the left side of the vehicle 100 when the vehicle 100 is viewed from the front. In the lamp 1a provided on the right side of the vehicle 100 when the vehicle 100 is viewed from the front, the arrangement of the second light emitting element 42, the third light emitting element 43, and the fourth light emitting element 44 is opposite to the left and right of the lamp 1a shown in FIG. It is assumed.
　次に本実施形態の車両用前照灯１の動作及び作用効果について説明する。 Next, the operation and effects of the vehicle headlamp 1 of the present embodiment will be described.
　本実施形態の灯具１ａは、第１点灯状態と第２点灯状態と第３点灯状態とに切り替えられる。本実施形態の第１点灯状態は、第１発光素子４１及び第２発光素子４２が点灯すると共に第３発光素子４３及び第４発光素子４４が消灯してハイビーム点灯状態とされる。また、本実施形態の第２点灯状態は、第２発光素子４２及び第３発光素子４３が点灯すると共に第１発光素子４１及び第４発光素子４４が消灯してロービーム点灯状態とされる。さらに、本実施形態の第３点灯状態は、第３発光素子４３及び第４発光素子４４が点灯すると共に第１発光素子４１及び第２発光素子４２が消灯してコーナリングランプ点灯状態とされる。このように本実施形態の灯具１ａは基板４０に実装される４つの発光素子を備え、第１点灯状態と第２点灯状態と第３点灯状態とに切り替えられる。灯具１ａが第１点灯状態、第２点灯状態、及び第３点灯状態に切り替えられることによって、灯具１ａに３つの機能を備えさせることができる。 The lamp 1 a according to the present embodiment is switched to the first lighting state, the second lighting state, and the third lighting state. In the first lighting state of the present embodiment, the first light emitting element 41 and the second light emitting element 42 are turned on and the third light emitting element 43 and the fourth light emitting element 44 are turned off to be in a high beam lighting state. Further, in the second lighting state of the present embodiment, the second light emitting element 42 and the third light emitting element 43 are turned on and the first light emitting element 41 and the fourth light emitting element 44 are turned off to be in the low beam lighting state. Furthermore, in the third lighting state of the present embodiment, the third light emitting element 43 and the fourth light emitting element 44 are turned on and the first light emitting element 41 and the second light emitting element 42 are turned off, and the cornering lamp is turned on. As described above, the lamp 1a according to the present embodiment includes four light emitting elements mounted on the substrate 40, and can be switched between the first lighting state, the second lighting state, and the third lighting state. By switching the lamp 1 a to the first lighting state, the second lighting state, and the third lighting state, the lamp 1 a can be provided with three functions.
　上記のように基板４０に４つ以上の発光素子が実装される場合、灯具１ａは３つ以上の点灯状態に切り替えられるように構成され得る。灯具１ａが第１点灯状態と第２点灯状態と第３点灯状態とに切り替えられる場合、第３点灯状態は、第１点灯状態及び第２点灯状態において消灯する発光素子を含む複数の発光素子が点灯すると共に少なくとも１つの発光素子が消灯する状態とされる。また、第３点灯状態において点灯する発光素子は、第１点灯状態または第２点灯状態において点灯する少なくとも１つの発光素子を含む。 When four or more light emitting elements are mounted on the substrate 40 as described above, the lamp 1 a may be configured to be switched to three or more lighting states. When the lamp 1a is switched to the first lighting state, the second lighting state, and the third lighting state, the third lighting state is a plurality of light emitting elements including light emitting elements that are extinguished in the first lighting state and the second lighting state. At the same time, at least one light emitting element is turned off while it is turned on. The light emitting element lit in the third lighting state includes at least one light emitting element lit in the first lighting state or the second lighting state.
　以上、本発明について、第１から第３実施形態を例に説明したが、本発明はこれらの実施形態に限定されるものではない。 The present invention has been described above by taking the first to third embodiments as examples, but the present invention is not limited to these embodiments.
　例えば、基板４０に実装される発光素子の数は３つ以上であれば特に限定されず、発光素子の数及び配置は、灯具１ａに求められる機能によって適宜選択され得る。 For example, the number of light emitting elements mounted on the substrate 40 is not particularly limited as long as it is three or more, and the number and arrangement of the light emitting elements can be appropriately selected according to the function required for the lamp 1a.
　また、灯具１ａが第１点灯状態と第２点灯状態とに切り替えられる場合において、第１点灯状態がロービーム点灯状態とされ、第２点灯状態がコーナリングランプ点灯状態とされてもよい。この場合、上記第３実施形態の灯具１ａから第１発光素子４１が除かれた形態とすることができる。 Further, when the lamp 1a is switched to the first lighting state and the second lighting state, the first lighting state may be the low beam lighting state, and the second lighting state may be the cornering lamp lighting state. In this case, the first light emitting element 41 can be removed from the lamp 1 a of the third embodiment.
　また、灯具の数は特に限定されない。灯具が複数備えられる場合、各灯具の位置は特に限定されない。したがって、例えば、上記実施形態において、灯具１ａが車両１００の最も中心側に配置されても良い。 In addition, the number of lamps is not particularly limited. When multiple lamps are provided, the position of each lamp is not particularly limited. Therefore, for example, in the above embodiment, the lamp 1a may be disposed on the most central side of the vehicle 100.
　また、これまでは第１発光素子４１、第２発光素子４２及び第３発光素子４３の下方にリフレクタ２０が配置される形態を例示して説明したが、リフレクタ２０は、第１発光素子４１、第２発光素子４２及び第３発光素子４３の上方に設けられてもよい。この場合、それぞれの発光素子の前後方向の位置関係は上記実施形態と逆にされる。 In addition, although the configuration in which the reflector 20 is disposed below the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 has been described above, the reflector 20 includes the first light emitting element 41, It may be provided above the second light emitting element 42 and the third light emitting element 43. In this case, the positional relationship between the light emitting elements in the front-rear direction is reversed to that in the above embodiment.
　また、第１発光素子４１、第２発光素子４２及び第３発光素子４３としてＬＥＤが用いられる例を挙げて説明したが、第１発光素子４１、第２発光素子４２及び第３発光素子４３はレーザ光源や他の光源であってもよい。 Also, although an example in which LEDs are used as the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 has been described, the first light emitting element 41, the second light emitting element 42, and the third light emitting element 43 It may be a laser light source or another light source.
　また、第１発光素子４１、第２発光素子４２及び第３発光素子４３から出射される光をリフレクタ２０で反射させる所謂パラボラ型の灯具を例に挙げて説明したが、本発明の車両用前照灯に用いられる灯具は、当該形態に限定されない。本発明の車両用前照灯に用いられる灯具は、発光素子から出射される光が凸レンズを通って出射するプロジェクター型の灯具や、発光素子からの光が直接レンズを通って出射する直射レンズ型の灯具等であってもよい。 In addition, although the light of the so-called parabolic type in which the light emitted from the first light emitting element 41, the second light emitting element 42 and the third light emitting element 43 is reflected by the reflector 20 is described as an example The lamp used for a lighting is not limited to the said form. The lamp used for the vehicle headlamp according to the present invention is a projector type lamp in which light emitted from the light emitting element is emitted through the convex lens, or a direct lens type in which light from the light emitting element is emitted directly through the lens Or the like.
　また、上記第１から第３実施形態に係る灯具１ａは適宜組み合わせて用いられてもよい。例えば、車両用前照灯が複数の灯具を備え、少なくとも１つの灯具が第１実施形態の灯具１ａと同じ構成とされると共に、少なくとも他の１つの灯具が第２実施形態の灯具１ａと同じ構成とされてもよい。 In addition, the lamps 1a according to the first to third embodiments may be appropriately combined and used. For example, a vehicular headlamp includes a plurality of lamps, at least one lamp having the same configuration as the lamp 1a of the first embodiment, and at least one other lamp is the same as the lamp 1a of the second embodiment. It may be configured.
　以上説明したように、本発明によれば、発熱量が抑制され得る車両用前照灯を提供することができる。当該車両用前照灯は、自動車等の車両用前照灯などの分野において利用可能である。 As described above, according to the present invention, it is possible to provide a vehicular headlamp capable of suppressing the amount of heat generation. The said vehicle headlamp can be utilized in the field | areas, such as vehicle headlamps, such as a motor vehicle.
１・・・車両用前照灯
１ａ，１ｂ，１ｃ・・・灯具
１０・・・筐体
２０・・・リフレクタ
４０・・・基板
４１・・・第１発光素子
４２・・・第２発光素子
４３・・・第３発光素子
４４・・・第４発光素子
５０・・・ヒートシンク
ＬＵａ・・・灯具ユニット DESCRIPTION OF SYMBOLS 1 ... Vehicle headlamp 1a, 1b, 1c ... Lamp 10 ... Housing | casing 20 ... Reflector 40 ... Substrate 41 ... 1st light emitting element 42 ... 2nd light emitting element 43 third light emitting element 44 fourth light emitting element 50 heat sink LUa lamp unit

Claims (6)

  1. 　３つ以上の発光素子と、
    　前記３つ以上の発光素子が共通して実装される基板と、
    を備え、
    　前記３つ以上の発光素子のうち複数の前記発光素子が点灯すると共に少なくとも一つの前記発光素子が消灯する第１点灯状態と、前記３つ以上の発光素子のうち複数の前記発光素子が点灯すると共に少なくとも一つの前記発光素子が消灯する第２点灯状態と、に切り替えられ、
    　前記第１点灯状態において点灯する前記複数の発光素子と前記第２点灯状態において点灯する前記複数の発光素子とは、少なくとも１つが同じ前記発光素子であり、他の少なくとも１つが互いに異なる前記発光素子である
    ことを特徴とする車両用前照灯。     Three or more light emitting elements,
    A substrate on which the three or more light emitting elements are mounted in common;
    Equipped with
    Among the three or more light emitting elements, a first lighting state in which a plurality of light emitting elements are turned on and at least one of the light emitting elements is turned off, and a plurality of light emitting elements among the three or more light emitting elements are turned on And a second lighting state in which at least one of the light emitting elements is turned off, and
    At least one of the plurality of light emitting elements lit in the first lighting state and the plurality of light emitting elements lit in the second lighting state are the same light emitting elements, and the other light emitting elements are different in at least one other A vehicular headlamp characterized by being.
  2. 　前記第１点灯状態において点灯する前記発光素子の数と前記第２点灯状態において点灯する前記発光素子の数とが同じである
    ことを特徴とする請求項１に記載の車両用前照灯。     2. The vehicular headlamp according to claim 1, wherein the number of the light emitting elements lit in the first lighting state is the same as the number of the light emitting elements lit in the second lighting state.
  3. 　前記第１点灯状態はハイビーム点灯状態であり、前記第２点灯状態はロービーム点灯状態である
    ことを特徴とする請求項１または２に記載の車両用前照灯。     The vehicular headlamp according to claim 1 or 2, wherein the first lighting state is a high beam lighting state, and the second lighting state is a low beam lighting state.
  4. 　前記第１点灯状態はハイビーム点灯状態であり、前記第２点灯状態はコーナリングランプ点灯状態である
    ことを特徴とする請求項１または２に記載の車両用前照灯。     The vehicular headlamp according to claim 1 or 2, wherein the first lighting state is a high beam lighting state, and the second lighting state is a cornering lamp lighting state.
  5. 　前記基板に実装される４つ以上の前記発光素子を備え、
    　前記第１点灯状態と、前記第２点灯状態と、前記第１点灯状態及び前記第２点灯状態において消灯する前記発光素子を含む複数の前記発光素子が点灯すると共に少なくとも１つの前記発光素子が消灯する第３点灯状態と、に切り替えられる
    ことを特徴とする請求項１から４のいずれか１項に記載の車両用前照灯。     And four or more of the light emitting elements mounted on the substrate;
    A plurality of the light emitting elements including the light emitting elements which are turned off in the first lighting state, the second lighting state, the first lighting state and the second lighting state are turned on and at least one light emitting element is turned off The vehicular headlamp according to any one of claims 1 to 4, characterized in that it is switched to a third lighting state.
  6. 　前記基板からの熱が伝播するヒートシンクが更に備えられる
    ことを特徴とする請求項１から５のいずれか１項に記載の車両用前照灯。     The vehicle headlamp according to any one of claims 1 to 5, further comprising a heat sink for transmitting heat from the substrate.
PCT/JP2018/045678 2017-12-19 2018-12-12 Vehicle headlight WO2019124188A1 (en)

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CN201880081950.8A CN111556945A (en) 2017-12-19 2018-12-12 Vehicle headlamp
JP2019561006A JPWO2019124188A1 (en) 2017-12-19 2018-12-12 Vehicle headlights

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Cited By (1)

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WO2024043205A1 (en) * 2022-08-22 2024-02-29 株式会社小糸製作所 Vehicle headlamp

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JP2011051381A (en) * 2009-08-31 2011-03-17 Stanley Electric Co Ltd Headlight for vehicle
JP2013239408A (en) * 2012-05-17 2013-11-28 Koito Mfg Co Ltd Vehicular headlight
JP2015185232A (en) * 2014-03-20 2015-10-22 スタンレー電気株式会社 Vehicle lamp

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JP2001270383A (en) * 2000-03-28 2001-10-02 Koito Mfg Co Ltd Head lamp system for vehicle
JP2014127238A (en) * 2012-12-25 2014-07-07 Koito Mfg Co Ltd Headlight for vehicle

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JP2011051381A (en) * 2009-08-31 2011-03-17 Stanley Electric Co Ltd Headlight for vehicle
JP2013239408A (en) * 2012-05-17 2013-11-28 Koito Mfg Co Ltd Vehicular headlight
JP2015185232A (en) * 2014-03-20 2015-10-22 スタンレー電気株式会社 Vehicle lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024043205A1 (en) * 2022-08-22 2024-02-29 株式会社小糸製作所 Vehicle headlamp

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JPWO2019124188A1 (en) 2020-12-10

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