WO2016113818A1 - Dispositif d'éclairage, véhicule, et procédé de commande pour dispositif d'éclairage - Google Patents

Dispositif d'éclairage, véhicule, et procédé de commande pour dispositif d'éclairage Download PDF

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Publication number
WO2016113818A1
WO2016113818A1 PCT/JP2015/006390 JP2015006390W WO2016113818A1 WO 2016113818 A1 WO2016113818 A1 WO 2016113818A1 JP 2015006390 W JP2015006390 W JP 2015006390W WO 2016113818 A1 WO2016113818 A1 WO 2016113818A1
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WO
WIPO (PCT)
Prior art keywords
laser light
region
phosphor
movable mirror
light source
Prior art date
Application number
PCT/JP2015/006390
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English (en)
Japanese (ja)
Inventor
篤志 山島
Original Assignee
パナソニックＩｐマネジメント株式会社
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 パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2016569134A priority Critical patent/JP6268369B2/ja
Publication of WO2016113818A1 publication Critical patent/WO2016113818A1/fr

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    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means

Definitions

  • the present disclosure relates to a lighting device, a vehicle, and a method for controlling the lighting device.
  • laser light sources have attracted attention as light sources applied to automobile headlights because of their high efficiency and high directivity.
  • a laser light source When a laser light source is applied, it is possible to change the location (light distribution) illuminated by the headlights while traveling by using the high directivity, and by using a movable mirror. It is known that the light pattern can be controlled.
  • Patent Document 1 is cited as a prior document related to the present disclosure.
  • a mirror that reflects light from a semiconductor light source is reciprocally rotated, and on / off (ON / OFF) of the semiconductor light source is controlled for each of a plurality of light control sections obtained by dividing the movement cycle of the mirror.
  • a vehicular lamp that adjusts the illuminance distribution around the vehicle by combining ON / OFF control of a semiconductor light source with the periodic movement of the mirror is disclosed.
  • a white light source is obtained by exciting a phosphor with laser light emitted from the laser light source.
  • an automotive headlight using a laser light source and a phosphor has a problem that if the shade is not used, the light is blurred and a cutoff line for preventing dazzling cannot be realized. Further, in this headlight, if a shade or a filter is used, a cut-off line for preventing dazzling can be realized, but there is a problem that the number of parts increases and the configuration becomes complicated.
  • An object of the present disclosure is to provide an illumination device that forms a clear cut-off line with a simple configuration, a vehicle equipped with the illumination device, and a method for controlling the illumination device.
  • the lighting device includes a laser light source, a movable mirror, a phosphor, a sensor, and a control unit.
  • the laser light source generates laser light.
  • the movable mirror has a mirror surface that reflects the laser beam and is movable.
  • the phosphor includes a first region and a second region located outside the first region, and is disposed at a position where the laser beam reflected by the movable mirror is irradiated. Further, the phosphor converts laser light into fluorescence.
  • the sensor detects an object that exists in the fluorescence irradiation direction.
  • the control unit avoids the irradiation of the laser beam to the first region, and the movable mirror so that the light intensity of the fluorescence emitted from the phosphor in the second region becomes non-uniform To control.
  • a control method includes a laser light source, a movable mirror, a phosphor, a sensor, and a control unit, and the phosphor is a first region and a first region located outside the first region.
  • a lighting device control method comprising two regions, characterized by the following. That is, the laser light generated from the laser light source and reflected by the movable mirror irradiates the phosphor to generate fluorescence, the fluorescence irradiates the object, and the sensor detects the object.
  • control unit avoids the irradiation of the laser beam to the first region, and the light intensity of the fluorescence emitted from the phosphor in the second region becomes non-uniform. Control the movable mirror or laser light source.
  • a clear cut-off line can be formed with a simple configuration.
  • FIG. 3 is a block diagram illustrating a configuration for controlling the headlight according to the first embodiment of the present disclosure.
  • FIG. 1 is a front view of a vehicle according to the first embodiment of the present disclosure.
  • the vehicle is arranged horizontally on the road.
  • the surface on which the vehicle is disposed is referred to as a horizontal plane, and a direction perpendicular to the horizontal plane is referred to as a vertical direction.
  • headlights 2 are arranged on the left and right sides of the front portion of the vehicle body 1.
  • the headlight 2 is arranged with the light irradiation direction facing the outside of the vehicle.
  • FIG. 2 is a transverse sectional view (II-II sectional view) of the headlight 2 on the left side of the vehicle in FIG.
  • the headlight 2 includes a laser light source 11, a movable mirror 12, a phosphor 13, and a lens 14.
  • the laser light source 11 generates laser light and irradiates the movable mirror 12.
  • the laser light source 11 is a semiconductor laser element composed of, for example, a group III nitride semiconductor, and the laser light is, for example, blue (wavelength: 430 nm to 470 nm).
  • the movable mirror 12 is a MEMS (Micro Electro Mechanical System) mirror, for example, and rotates the mirror surface at high speed around one or two axes under the control of a control unit (not shown).
  • the movable mirror 12 reflects the laser beam generated from the laser light source 11 and irradiates the phosphor 13. In the following description, it is assumed that the mirror surface rotates around one axis in the vertical direction.
  • the phosphor 13 is excited by being irradiated with the laser light reflected by the movable mirror 12, and converts the laser light into fluorescence.
  • the phosphor 13 converts blue laser light into white light and becomes a white light source.
  • the phosphor material constituting the phosphor 13 include a YAG phosphor, a SiAlON phosphor, and a CaAlSiN 3 phosphor.
  • the phosphor 13 may convert the laser light into not only white light but also light yellow light, orange light, and the like.
  • the phosphor 13 has, for example, a rectangular shape whose longitudinal direction is the horizontal direction.
  • the lens 14 diffuses white light emitted from the phosphor 13 and irradiates the front of the vehicle.
  • the optical axis 15 of the lens 14 passes, for example, the center of the rectangle (that is, the center of the phosphor 13).
  • FIG. 3 is a block diagram showing a configuration for controlling the headlight 2 according to the first embodiment of the present invention.
  • the operation device 21 is a switch for switching the headlight 2 on / off.
  • the memory 22 stores a plurality of output patterns of the laser light source 11 according to the position in front of the headlight, that is, a position where another vehicle or person such as an oncoming vehicle is present in the irradiation direction of white light.
  • the sensor 23 detects whether there is another vehicle or a person in front of the headlight, and detects the position when another vehicle or person is present.
  • the laser light source 11 switches the output of the laser light according to the control of the control unit 24.
  • the movable mirror 12 switches the rotation speed of the mirror according to the control of the control unit 24.
  • the control unit 24 When the controller 21 switches the headlight 2 to ON, the control unit 24 receives an ON signal and acquires information on whether there is another vehicle or a person in front of the headlight from the sensor 23. If there is a vehicle or a person, the position information is also acquired. When there is another vehicle or person in front of the headlight, the control unit 24 reads the output pattern of the laser light source 11 corresponding to the position from the memory 22 and controls the laser light source 11 according to the read output pattern. .
  • FIG. 4 shows an example of the output pattern of the laser light source 11 stored in the memory 22 of FIG.
  • the position of the center on the phosphor 13 (rectangular center for the above-described rectangular phosphor) is set to coordinate 0 and the laser light irradiation direction is oriented at coordinate 0, for example, fluorescence
  • the right side on the body 13 is indicated by positive coordinates, and the left side on the phosphor 13 is indicated by negative coordinates.
  • the output pattern value “0” indicates that the output of the laser light source 11 is 0, and the output pattern value “1” indicates that the output of the laser light source 11 is 100% (corrects the light intensity).
  • the normal output in the case of not performing is 100%), and the numerical value “2” of the output pattern indicates that the output of the laser light source 11 is 200%.
  • the first area with coordinates ⁇ 1 to 1 is set to a numerical value “0”, and all other coordinates are set to a numerical value “1”.
  • the first area of the coordinates ⁇ 1 to 1 is the numerical value “0”
  • the coordinate ⁇ 2, 2 is the numerical value “0”
  • coordinates ⁇ 5 and 5 are numerical values “0”
  • coordinates ⁇ 6 and 6 are numerical values “2”
  • coordinates ⁇ 7 and 7 are numerical values “0”
  • coordinates ⁇ 8 and 8 are numerical values “1”.
  • the coordinates ⁇ 7 to ⁇ 2 and the coordinates 2 to 7 are the second area.
  • the output of the laser light source 11 that irradiates the first region that is the region on the phosphor 13 corresponding to the irradiation direction to another vehicle or person is set to 0, and
  • the output of the laser light source 11 is varied to irradiate the second region which is a predetermined region in the phosphor 13 outside the first region.
  • FIG. 5 shows a change in light intensity of white light when the output pattern of the laser light source 11 shown in FIG. 4 is applied.
  • the horizontal axis represents coordinates
  • the vertical axis represents the light intensity [%] of white light.
  • the dotted line shows the change in the light intensity of the white light when the light intensity is not corrected
  • the solid line shows the change in the light intensity of the white light when the light intensity is corrected.
  • the light intensity of 100% is, for example, the light intensity required by a rule set by a country or an organization.
  • the first region where white light emission is to be avoided is between coordinates ⁇ 1 and 1, when the light intensity is not corrected, the light intensity is not 0 and white light is emitted. . On the other hand, in the case of light intensity correction, the light intensity is almost 0 and no white light is emitted. In addition, it turns out that the light intensity of the white light emitted from the phosphor is nonuniform in the second region, which is a predetermined region outside the first region where it is desired to avoid the emission of white light, that is, there is unevenness.
  • control unit 24 determines whether or not an ON signal indicating that the headlight 2 is ON is input from the operation device 21 (step S01).
  • step S01 If it is determined in step S01 that an ON signal has been input (step S01: YES), the control unit 24 activates the laser light source 11 and the movable mirror 12 (step S02).
  • control unit 24 determines whether or not detection information indicating that another vehicle or person has been detected in front of the headlight is input from the sensor 23 (step S03).
  • step S03 When it is determined in step S03 that detection information has been input (step S03: YES), the control unit 24 reads the output pattern of the laser light source 11 with light intensity correction from the memory 22, and performs laser processing according to the read output pattern. The output of the light source 11 is controlled (step S04), and the flow returns to step S01.
  • step S03 If it is determined in step S03 that no detection information has been input (step S03: NO), the flow returns to step S01.
  • step S01 when it is determined that the ON signal is not input (step S01: NO), the control unit 24 stops the laser light source 11 and the movable mirror 12 (step S05) and ends the control procedure.
  • FIG. 7 is a diagram showing an optical simulation result of the headlight 2 according to Embodiment 1 of the present invention.
  • 7A shows an optical simulation result without light intensity correction
  • FIG. 7B shows an optical simulation result with light intensity correction.
  • FIG. 7A blurring occurs in the cut-off area indicated by the dotted frame in the drawing.
  • FIG. 7B it can be seen that the blur in the cut-off region indicated by the dotted frame in the figure is reduced.
  • the area on the phosphor 13 corresponding to the irradiation direction to the other vehicle or person is set as the first area
  • a predetermined area in the phosphor 13 outside the first area is defined as a second area.
  • the first region is irradiated with the output of the laser light source 11 set to 0, and the output of the laser light source 11 is varied in the second region with an output pattern according to the position of another vehicle or person.
  • the light intensity of the white light emitted from the phosphor 13 in the second region is made non-uniform. Accordingly, the cut-off line can be clearly formed with a simple configuration without adding a part such as a shade or a filter.
  • the memory 22 stores a plurality of rotational speed patterns of the movable mirror 12 in accordance with the position where another vehicle or person is present in front of the headlight.
  • the control unit 24 When the controller 21 switches the headlight 2 to ON, the control unit 24 receives an ON signal and acquires information on whether there is another vehicle or a person in front of the headlight from the sensor 23. If there is a vehicle or a person, the position information is also acquired. When there is another vehicle or a person in front of the headlight, the control unit 24 reads the rotational speed pattern of the movable mirror 12 corresponding to the position from the memory 22 and moves the movable mirror 12 according to the read rotational speed pattern. Control.
  • FIG. 4 An example of the rotational speed pattern of the movable mirror 12 stored in the memory 22 is shown in FIG.
  • the position on the phosphor 13 that emits laser light to irradiate white light to the position (center position) of another vehicle or person is set to coordinate 0, and the laser light irradiation direction is directed at coordinate 0.
  • the right side on the phosphor 13 is indicated by positive coordinates
  • the left side on the phosphor 13 is indicated by negative coordinates.
  • the numerical value “0” of the rotational speed pattern represents that the rotational speed of the movable mirror 12 is, for example, 100% of the maximum speed and the output of the laser light source 11 is 0, and the numerical value “1” of the rotational speed pattern is
  • the rotation speed of the movable mirror 12 is represented as 100% of the maximum speed, for example, and the numerical value “2” of the rotation speed pattern represents the rotation speed of the movable mirror 12 as 50% of the maximum speed.
  • the output of the laser light source 11 is 100%.
  • the light intensity of the white light emitted from the phosphor 13 increases as the rotation speed of the movable mirror 12 decreases. If the light intensity of the white light in “1” is 1, the light intensity of the white light in the numerical value “2” is doubled. Note that with the numerical value “0”, the light intensity of white light is zero.
  • the first area of coordinates ⁇ 1 to 1 is set to a numerical value “0”, and the other coordinates are set to a numerical value 1.
  • the first area of the coordinates ⁇ 1 to 1 is represented by a numerical value “0”
  • the coordinates ⁇ 2 and 2 are represented by a numerical value “0”
  • the coordinates ⁇ 4, ⁇ 3, 3 and 4 are represented.
  • coordinates ⁇ 5 and 5 are numerical values “0”
  • coordinates ⁇ 6 and 6 are numerical values “2”
  • coordinates ⁇ 7 and 7 are numerical values “0”
  • coordinates ⁇ 8 and 8 are numerical values “1”.
  • the coordinates ⁇ 7 to ⁇ 2 and the coordinates 2 to 7 are the second area.
  • the output of the laser light source 11 that irradiates the first region that is the region on the phosphor 13 corresponding to the irradiation direction to another vehicle or person is set to 0, and
  • the rotational speed of the movable mirror 12 is varied to irradiate the second region, which is a predetermined region in the phosphor 13 outside the first region.
  • step S03 If it is determined in step S03 that detection information has been input (step S03: YES), the control unit 24 reads the rotational speed pattern of the movable mirror 12 with correction from the memory 22, and moves according to the read rotational speed pattern. The rotational speed of the mirror 12 is controlled (step S11), and the flow returns to step S01.
  • the area on the phosphor 13 corresponding to the irradiation direction to the other vehicle or person is set as the first area.
  • a predetermined region in the phosphor 13 outside the first region is set as the second region, and the first region is irradiated with the output of the laser light source 11 set to zero.
  • the rotational speed of the movable mirror 12 is varied with a rotational speed pattern according to the position of another vehicle or person, and the light intensity of the white light emitted from the phosphor 13 in the second region is not allowed.
  • the vehicle headlight has been described as an example of the lighting device.
  • the lighting device includes a vehicle brake lamp, a tail lamp, a fog lamp, a turn signal lamp, and a position. Lights other than lamps and vehicles may be used.
  • the mirror surface has been described as rotating about one axis in the vertical direction.
  • the present disclosure is not limited thereto, and the mirror surface is horizontal. It may be rotated around one axis in the direction, or may be rotated around two axes in the vertical direction and the horizontal direction.
  • the movable mirror 12 is described as a MEMS mirror.
  • a mirror such as a DMD (Digital Mirror Device) may be used.
  • the movable mirror 12 is a DMD, an area to be irradiated by reflecting the laser light emitted from the laser light source 11 can be selected two-dimensionally under the control of the control unit 24.
  • a semiconductor laser element composed of a group III nitride semiconductor emitting blue (wavelength: 430 nm to 470 nm) is used.
  • the present invention is not limited thereto, and the wavelength is 400 nm to 430 nm.
  • the semiconductor laser element emitting blue violet or purple may be used. Further, it may be a semiconductor laser element that emits ultraviolet light having a wavelength of 400 nm or less.
  • the phosphor 13 uses a phosphor that emits blue light, a phosphor that emits green light, and a phosphor that emits red light. Alternatively, green light and red light may be emitted and extracted from the headlight 2 as white light.
  • the invention according to the present disclosure may be a combination of the first embodiment and the second embodiment. That is, both the output of the laser light source and the rotational speed of the movable mirror may be controlled simultaneously.
  • the invention according to the present disclosure is useful for forming a clear cut-off line for preventing dazzling in a headlight with a simple configuration.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

　L'invention concerne un dispositif d'éclairage qui forme une ligne de coupure claire à l'aide d'une structure simple, un véhicule, et un procédé de commande. Un phare comprend une source (11) de lumière laser, un miroir mobile (12), et un corps fluorescent. La source (11) de lumière laser génère une lumière laser et expose le miroir mobile (12) au rayonnement de la lumière laser. La surface de miroir du miroir mobile (12) est mise en rotation à grande vitesse à l'aide d'une commande en provenance d'une unité de commande. Le miroir mobile (12) réfléchit la lumière laser générée par la source (11) de lumière laser et expose le corps fluorescent au rayonnement de la lumière laser. Le corps fluorescent est exposé au rayonnement de la lumière laser réfléchie par le miroir mobile (12), est excité, et convertit la lumière laser en fluorescence. Quand un autre véhicule ou une personne est présent(e) devant le phare, une unité de commande (24) lit à partir de la mémoire (22) une configuration de sortie pour la source (11) de lumière laser selon la position du véhicule ou de la personne, et commande la source (11) de lumière laser selon la configuration de sortie qui a été lue.
PCT/JP2015/006390 2015-01-16 2015-12-22 Dispositif d'éclairage, véhicule, et procédé de commande pour dispositif d'éclairage WO2016113818A1 (fr)

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JP2015006762 2015-01-16
JP2015-006762 2015-01-16

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WO2016113818A1 true WO2016113818A1 (fr) 2016-07-21

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3064223A1 (fr) * 2017-03-21 2018-09-28 Valeo Vision Module d'emission lumineuse ameliore pour vehicule automobile
CN108674303A (zh) * 2018-05-14 2018-10-19 佛山市洁宇信息科技有限公司 一种车辆远光灯控制***及控制方法
CN110360524A (zh) * 2018-04-10 2019-10-22 株式会社小糸制作所 灯装置
EP3859204A4 (fr) * 2018-09-28 2022-05-04 Ichikoh Industries, Ltd. Lampe de véhicule
JP2022533730A (ja) * 2019-05-20 2022-07-25 ヴァレオ ビジョン ピクセル化された光線を照射するために発光装置を制御する方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009048786A (ja) * 2007-08-13 2009-03-05 Koito Mfg Co Ltd 車両用前照灯
JP2010006109A (ja) * 2008-06-24 2010-01-14 Koito Mfg Co Ltd 車両用灯具
JP2014113964A (ja) * 2012-12-11 2014-06-26 Koito Mfg Co Ltd 灯具制御システムおよび制御装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009048786A (ja) * 2007-08-13 2009-03-05 Koito Mfg Co Ltd 車両用前照灯
JP2010006109A (ja) * 2008-06-24 2010-01-14 Koito Mfg Co Ltd 車両用灯具
JP2014113964A (ja) * 2012-12-11 2014-06-26 Koito Mfg Co Ltd 灯具制御システムおよび制御装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3064223A1 (fr) * 2017-03-21 2018-09-28 Valeo Vision Module d'emission lumineuse ameliore pour vehicule automobile
CN110360524A (zh) * 2018-04-10 2019-10-22 株式会社小糸制作所 灯装置
CN110360524B (zh) * 2018-04-10 2021-09-14 株式会社小糸制作所 灯装置
CN108674303A (zh) * 2018-05-14 2018-10-19 佛山市洁宇信息科技有限公司 一种车辆远光灯控制***及控制方法
EP3859204A4 (fr) * 2018-09-28 2022-05-04 Ichikoh Industries, Ltd. Lampe de véhicule
JP2022533730A (ja) * 2019-05-20 2022-07-25 ヴァレオ ビジョン ピクセル化された光線を照射するために発光装置を制御する方法

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