WO2016042052A1 - Projecteur laser muni d'un élément de déviation de la lumière - Google Patents

Projecteur laser muni d'un élément de déviation de la lumière Download PDF

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Publication number
WO2016042052A1
WO2016042052A1 PCT/EP2015/071272 EP2015071272W WO2016042052A1 WO 2016042052 A1 WO2016042052 A1 WO 2016042052A1 EP 2015071272 W EP2015071272 W EP 2015071272W WO 2016042052 A1 WO2016042052 A1 WO 2016042052A1
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WO
WIPO (PCT)
Prior art keywords
light
laser
phosphor
incidence
movable
Prior art date
Application number
PCT/EP2015/071272
Other languages
German (de)
English (en)
Inventor
Joachim Knittel
Christian Buchberger
Original Assignee
Automotive Lighting Reutlingen Gmbh
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 Automotive Lighting Reutlingen Gmbh filed Critical Automotive Lighting Reutlingen Gmbh
Priority to EP15771872.7A priority Critical patent/EP3194839B1/fr
Publication of WO2016042052A1 publication Critical patent/WO2016042052A1/fr

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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
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • 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
    • F21S41/16—Laser 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
    • 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
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers

Definitions

  • the present invention relates to a laser headlight according to the preamble of claim 1.
  • Such a laser headlamp has a laser light source, a phosphor and a light deflecting device which is adapted to illuminate different subregions of the phosphor separately from one another with laser light, wherein the light deflecting device has at least one movable first light deflecting element which is adapted to incident on itself To direct laser light in different spatial directions at different times, and wherein the light deflecting device is adapted to direct in a first spatial direction directed light in a first beam path on a first portion of the phosphor, and in a second spatial direction directed light in a second beam path to a to direct the second subregion of the phosphor.
  • Such a light deflection element is also referred to below as a scanner.
  • a scanner for example, can be built headlights that can produce almost any light distribution. This allows a dynamic adaptation of a light distribution generated by the headlight to changing traffic conditions.
  • a camera installed in the motor vehicle picks up the traffic situation in front of the vehicle.
  • a software analyzes the images and controls the light deflection element and thus the light distribution so that the road is always optimally illuminated and dazzling the oncoming traffic is avoided.
  • the safety is increased at night driving.
  • a headlight equipped with such a scanner is known, for example, from DE 10 2007 055 480 B3.
  • a focused laser beam of a laser emitting blue light is scanned over a phosphor (e.g., a phosphor) by means of a scanner, which converts the blue light of the laser into white mixed light by mixing with yellow or yellow-red fluorescent light.
  • the white light is directed through an optic on the road.
  • a headlamp which has an angularly movable reflector, which deflects a narrow beam very quickly into different spatial directions.
  • small areas are sequentially illuminated in time with the changes in the direction of the beam and thus scanned with light and thus scanned.
  • the total area which results as a union of the sequentially scanned illuminated small areas, represents for the human visual sense with sufficiently fast sampling and periodically sufficiently fast repeated scanning sequence as a continuous, bright area and thus as a coherent light distribution.
  • a sufficiently fast scan results For example, if the sampling sequence is repeated at a frequency greater than 100 Hz.
  • the light color of the light emitted by the phosphor in different directions changes directionally.
  • the light of the headlight appears to be somewhat whiter in one direction than in a second direction and slightly yellower in the second direction than in the first direction. This is an undesirable effect.
  • the object of the invention is to provide a laser headlamp of the type mentioned, in which this undesirable effect does not occur or at least occurs only to a greatly reduced extent.
  • the laser headlamp according to the invention differs from the known laser headlamp by the characterizing features of claim 1.
  • the headlamp according to the invention thus has the features of the preamble of claim 1 mentioned at the outset and is further characterized in that it is adapted to direct the vehicle to the first subarea Let there light from a first direction of incidence and to allow the light directed to the second portion of the light incident there from a second direction of incidence, wherein an angle between the first direction of incidence and the second direction of incidence is smaller than the angle between the first spatial direction and the second spatial direction ,
  • space direction here refers to the radiated light
  • incident direction refers to the incident light.
  • the direction of incidence relates, as usual in optics, to the perpendicular of the illuminated surface at the point of impact of the light beam.
  • the difference of incident directions in a movement of the movable first Lichtumlenkelements changes as much as the spatial directions of the emanating from the movable first Lichtumlenkelement light.
  • the laser headlamp according to the invention is set up to let the light directed onto the first subregion be incident there from a first direction of incidence and to allow the light guided onto the second subregion to be incident there from a second direction of incidence, wherein an angle between the first incidence direction and In the second direction of incidence is smaller than the angle between the first spatial direction and the second spatial direction, the difference of the incident directions in a movement of the movable first Lichtumlenkelements in the invention changes less than the spatial directions of the emanating from the movable first Lichtumlenkelement light.
  • the invention is based on the finding that the directional dependence of the light color also depends on which preferred direction in the phosphor scattered laser light (primary light) exits the phosphor and that this preferred direction of the direction of incidence on the phosphor and thus depends on the incidence on the phosphor, while the fluorescent light emanating from the phosphor has an emission characteristic which is independent of this impingement location.
  • the unwanted color variation thus depends on the angular variation of the laser light incident on the phosphor. The larger this angular variation, the greater the undesirable color variation.
  • the angle variation is inventively smaller in each case than the angular variation of the spatial directions in which the laser light emanates from the first movable Lichtumlenkelement. As a result, the desired reduction in color variation occurs in the invention.
  • a preferred embodiment is characterized in that in particular the light deflection device of the laser headlight is set up to allow the light directed onto the first subregion to be incident there from a first direction of incidence and to allow the light directed onto the second subregion to be incident there from a second direction of incidence, wherein an angle between the first incident direction and the second incident direction is smaller than the angle between the first spatial direction and the second spatial direction.
  • the invention can be realized in this way as a structural complement of existing systems, which reduces the development costs and facilitates adjustments to the vehicle type to vehicle type possibly different headlamp designs.
  • the angle between the first direction of incidence and the second direction of incidence is less than half, in particular less than a quarter, in particular less than 10% of the angle between the first spatial direction and the second spatial direction.
  • the first direction of incidence is parallel to the second direction of incidence. This embodiment realizes the ideal case in which the unwanted directional dependence of the light color disappears.
  • a preferred embodiment is characterized in that the light deflection device has a second light deflection element which lies in the beam path between the movable first light deflection element and the phosphor.
  • the light deflecting device has a collimating optics, in particular a collecting lens, arranged between the movable light deflecting element and the phosphor.
  • the converging lens is a convex-plane lens which faces the phosphor with its flat side.
  • a preferred embodiment is characterized in that the converging lens is arranged in the beam path immediately in front of the phosphor.
  • the phosphor is adhesively arranged on the flat side of the lens.
  • the phosphor has a curved shape, so that the partial areas result in a curved area in their sum.
  • This embodiment has the particular advantage that it requires only a particular form of the phosphor, but no additional parts such as lenses or mirrors as the second Lichtumlenkelement.
  • the surface is preferably just curved in such a way that the direction of incidence related to the perpendicular of a surface element of the point of impact of a light beam is independent of the point of impact.
  • a preferred embodiment is characterized in that the second light deflection element has a curved mirror surface.
  • the second light-deflecting element is a movable light-deflecting element, which is movable simultaneously with the first movable deflecting element.
  • the second light deflection element is a Fresnel lens or a flat diffractive structure.
  • Figure 1 shows the schematic structure of a laser light module of a known laser headlamp with scanner
  • Figure 2 shows the subject matter of Figure 1 in a situation with normal incidence of light on the phosphor
  • FIG. 3 shows the object of FIG. 1 in a situation with oblique incidence of light
  • Figure 4 shows a first embodiment of a laser headlamp 10 according to the invention
  • FIG. 5 shows elements from FIG. 4 together with angle relationships for different beam paths
  • Figure 6 shows an embodiment in which the phosphor has a curved shape
  • Figure 7 shows an embodiment in which the Lichtumlenk issues has a movable second Lichtumlenkelement
  • FIG. 8 shows an embodiment in which the light deflection device has an immovable second light deflection element
  • FIG. 9 shows an embodiment in which the light deflection device has as a second light deflection element a Fresnel lens or a flat diffractive structure, e.g. having a diffraction grating.
  • a blue laser is a laser that emits blue light from the visible spectral range.
  • the phosphor which is realized, for example, as a phosphor layer, scatters the blue light and converts a part thereof into yellow light.
  • the blue and yellow light components together produce white mixed light 11.
  • the scanner makes it possible to direct the laser beam to different areas 5a, 5b of the phosphor. In different areas of the laser beam from different directions of incidence, ie at different angles to the solder at the point of impact. The change of the angle of incidence from area to area becomes particularly large when the distance between the scanner and the phosphor is small. Small distances are necessary to keep the size of the headlamp small.
  • the mixed light 4 generated in the phosphor 5 is directed via a projection lens 6 in the headlight apron, where it is used in a proper use of the headlight in a motor vehicle to illuminate the road.
  • FIGS. 2 and 3 illustrate a change in the radiation characteristic of laser light scattered in the phosphor when the direction of incidence of the laser light changes.
  • Figure 2 shows a situation with normal incidence of light
  • Figure 3 shows a situation with oblique incidence of light.
  • the blue laser light 7 is perpendicular to the phosphor 5.
  • a portion 9 of the blue laser light 7 is scattered, preferably in the forward direction, ie in the imaginary extension of the direction of incidence of the laser light 7 on the phosphor 5.
  • This blue color component 9 has a maximum intensity in the direction of the incident laser beam 7.
  • Another portion of the blue laser light is absorbed by the light source and emitted as fluorescent light 8 in the yellow spectral range with a specific emission characteristics. In the case shown this is a Lambertian radiation characteristic.
  • the laser beam 7 falls obliquely on the lamp 5 a.
  • a portion of the blue laser light is preferably scattered in the forward direction, and thus in the direction of the obliquely incident laser beam. Due to the longer distance in the light source, the effective scattering is stronger than with normal incidence. As a result, the scattering in the preferred forward direction is less pronounced than in normal incidence.
  • the laser light As with vertical incidence, a certain portion of the laser light is again absorbed by the phosphor and emitted as fluorescent light 8 in the yellow or yellow-red spectral range.
  • the radiation characteristic of the fluorescent light 8 does not depend on the incident direction of the laser light.
  • the invention achieves, in the ideal case, that the laser beam impinges on the phosphor from the same direction of incidence in the entire scanning region.
  • the scattered laser light then has the same emission characteristic in each subregion of the phosphor. This ensures that the light color does not change throughout the scan area.
  • FIG. 4 shows a first exemplary embodiment of a laser headlight 10 according to the invention.
  • the headlight 10 has a housing 12 with a light exit opening, which is covered by a transparent cover panel 14.
  • a laser light module 16 Inside the headlight 10 is a laser light module 16.
  • the laser light module has in particular a laser light source 18, which emits laser light 17 from a first wavelength range.
  • the first wavelength range preferably comprises a narrow range from the blue portion of the spectrum of visible light.
  • the light emitted by the laser is focused with the first focusing optics 20 and directed by the movable first Lichtumlenkelement 22 on the converging lens 24.
  • the movable first Lichtumlenkelement is moved by an actuator 19 about a pivot point 21 oscillating.
  • the actuator 19 is, for example, a piezo actuator or a micromirror.
  • the actuator 19 is controlled by a control unit 23, which receives signals from a central light control device of a motor vehicle, which processes signals from vehicle sensors such as an apron camera, an ambient brightness sensor, a driver request generator, etc., without these to form a control signal for the actuator 19 Listing is meant conclusively.
  • the converging lens 24 forms, together with the first movable light deflection element, an embodiment of a light deflection device as defined in claim 1.
  • the converging lens 24 is arranged between the movable light deflection element 22 and the phosphor 26.
  • the phosphor which is realized, for example, as a phosphor layer, scatters the blue light and converts a part thereof into yellow or yellow-red fluorescent light.
  • the blue and yellow light components together make up the white mixed light.
  • the invention is not limited to this particular conversion and mixture.
  • laser light of a shorter wavelength in the phosphor is partly converted into fluorescent light of a longer wavelength.
  • the fluorescent light mixes with scattered but unconverted laser light to a mixed light.
  • the converging lens (24) ideally aligns the incident laser light (17) in parallel and allows it to be incident on the phosphor 26 located in the light path behind the condenser lens.
  • the focusing effected by the first focusing optics 20, in conjunction with the already small diameter and opening angle of the laser beam 17, causes only a partial region 26a, 26b of the light entry surface of the phosphor 26 to be illuminated at any one time. In FIG. 1, this is just an upper subregion 26a of the phosphor. Therefore white mixed light 28 emanates from this subarea, which is directed by the projection optics 30 into the apron of the light module 16 and thus of the headlamp 10.
  • the projection optical system 30 is illuminated from a different direction with white mixed light 28.
  • the projection optics 30 then generates a corresponding bright spot in advance of the headlamp 10 at different points in the apron.
  • a light distribution is generated in this manner as the sum of the light spots generated by the projection optics 30.
  • the movement takes place in particular sufficiently fast if the sequence of the different positions of the movable first Lichtumlenkelements is repeated at a frequency of more than 100 Hz, because the human sense of sight then perceives only a mean brightness of the total light distribution produced.
  • FIG. 5 shows elements from FIG. 1 together with angle relationships for different beam paths.
  • FIG. 5 shows a first beam path 32, in which the laser light propagates between the movable first light deflection element 22 and the phosphor 26, and a second beam path 34, in which the laser light likewise propagates between the movable first light deflection element and the phosphor.
  • the first beam path starts from the movable first light deflection element in a first spatial direction and the second beam path starts from the movable first light deflection element in a second spatial direction.
  • FIG. 5 illustrates this situation simplified in that it only depicts an angular position of the movable first light-deflecting element.
  • the first of the two spatial directions is coupled to a first subregion of the phosphor via the first optical path.
  • the coupling takes place in that light propagating in this beam path illuminates the first subarea.
  • the angle ⁇ is the angle between a first spatial direction, which is coupled to the first partial area 26a, and a second spatial direction, which is coupled to the second partial area 26b. Due to the collimating effect of the converging lens, of which only the main plane is shown in FIG. 5, the angle between the two beam paths in the lens is reduced.
  • the laser light incident on the first partial area via the first optical path from a first direction of incidence and the laser light incident on the second partial area via the second optical path from a second incident direction include an angle ⁇ .
  • the angle ⁇ is smaller than the angle ⁇ , which is effected in the subject matter of Figures 1 and 2 by the bundling or better parallelizing effect of the converging lens.
  • the light deflecting element in the subject matter of FIGS. 4 and 5 is a mirror, which is pivotable about an axis 21 oriented perpendicular to the plane of the drawing.
  • the focal length of the converging lens 24 ideally corresponds to the distance of its principal plane from the axis of rotation 21, and the axis of rotation 21 preferably intersects the laser beam 17 emanating from the focusing optical system.
  • the converging lens is preferably arranged in the beam path immediately in front of the phosphor, as shown in FIG.
  • the phosphor is arranged adhering to the flat side of the lens.
  • FIG. 6 shows an embodiment in which the phosphor 26 has a curved shape.
  • the phosphor is preferably curved in such a way that its side assigned to the movable first light deflecting element is concavely curved.
  • the radius of curvature is preferably locally dimensioned such that the surface normal of each subregion of the phosphor runs through the region of the movable first light deflecting element, on which the laser beam 17 is focused.
  • FIG. 7 shows an embodiment in which the light deflection device has a second light deflection element 36 which lies in the beam path between the movable first light deflection element and the phosphor 26.
  • FIG. 6 shows a first beam path, a second beam path and a third beam path.
  • the three beam paths still run together between the laser light source 18 and the movable first light deflection element 22, and they are split by the movable first light deflection element 22 into three different spatial directions and thus three different beam paths.
  • the splitting is generated by angular deflections of the movable first Lichtumschettis about a plane perpendicular to the plane of rotation.
  • the second Lichtumlenkelement is here as well as the first Lichtumlenkelement about an axis perpendicular to the plane of the drawing rotatably controllable in its angular position. It is therefore a controlled second movable Lichtumlenkelement 37.
  • the angular position of the second Lichtumlenkelements is always adjusted in time with an adjustment of the angle of the movable first Lichtumlenkiatas so that the angle ⁇ (see Figure 5) between rays from the second Lichtumlenkelement go out, is always smaller than the angle ⁇ between rays that come from the first Lichtumlenkelement starting on the movable second Lichtumlenkelement.
  • FIG. 7 illustrates this situation simplified in that it only depicts an angular position of the second light deflection element.
  • the curved arrow in the second Lichtumlenkelement also here represents the rotational mobility of the movable second Lichtumlenkiatas 37 about said axis of rotation.
  • the movable second Lichtumlenkelement 37 is preferably adjusted simultaneously with the movable first Lichtumlenkelement 22 so that the angle ⁇ is equal to zero, so that the incident at different points of the phosphor beams are parallel. Then starts from all parts of the phosphor light of the same light color. The adjustment preferably takes place in the manner described with reference to FIG. 4 for the first movable light deflection element 22.
  • FIG. 8 shows an embodiment in which the light deflection device has, as the second light deflection element 36, an immovable second light deflection element 38 which lies in the beam path between the movable first light deflection element 22 and the phosphor 26 and which has a curved mirror surface.
  • the curved mirror surface is shaped such that rays impinging on different points of the mirror surface are reflected there, such that the reflected rays enclose an angle ⁇ smaller and ideally compared to the angle ⁇ formed by the incident rays is equal to zero.
  • FIG. 9 shows an embodiment in which the light deflection device has as a second light deflection element 36 a Fresnel lens or a flat diffractive structure, e.g. having a diffraction grating. Due to the monochromatic nature of the laser light, a diffractive structure is a suitable means for changing the light propagation direction here.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne un projecteur laser muni d'une source de lumière laser, d'une substance luminescente et d'un dispositif de déviation de la lumière qui éclaire séparément dans le temps des parties différentes de la substance luminescente au moyen d'une lumière laser. Le dispositif de déviation de la lumière présente un premier élément de déviation de la lumière mobile qui oriente la lumière laser incidente dans des directions spatiales différentes à des moments différents, et le dispositif de déviation de la lumière dirige la lumière orientée dans une première direction spatiale dans un premier chemin optique sur une première partie de la substance luminescente, et dirige la lumière orientée dans une seconde direction spatiale dans un second chemin optique sur une seconde partie de la substance luminescente. Le projecteur est caractérisé en ce qu'il est est conçu pour permettre une incidence la plus parallèle possible de la lumière dirigée sur la première partie et sur la seconde partie.
PCT/EP2015/071272 2014-09-19 2015-09-17 Projecteur laser muni d'un élément de déviation de la lumière WO2016042052A1 (fr)

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Application Number Priority Date Filing Date Title
EP15771872.7A EP3194839B1 (fr) 2014-09-19 2015-09-17 Projecteur laser muni d'un élément de déviation de la lumière mobile

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DE102014218955.1 2014-09-19
DE102014218955.1A DE102014218955A1 (de) 2014-09-19 2014-09-19 Laserscheinwerfer mit einem beweglichen Lichtumlenkelement

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WO2016042052A1 true WO2016042052A1 (fr) 2016-03-24

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016217323A1 (de) 2016-09-12 2018-03-15 Osram Gmbh Lichtmodul zum Bereitstellen von Effektlicht
WO2018082224A1 (fr) * 2016-11-04 2018-05-11 武汉通畅汽车电子照明有限公司 Module optique de phare d'automobile à haute résolution et procédé de commande d'éclairage à faisceau élevé à haute résolution associé
EP3434965A4 (fr) * 2016-03-24 2019-11-27 Koito Manufacturing Co., Ltd. Phare pour véhicule
CN110608413A (zh) * 2018-06-15 2019-12-24 株式会社小糸制作所 光学单元及车辆用前照灯

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Publication number Priority date Publication date Assignee Title
DE102017204819A1 (de) 2017-03-22 2018-09-27 Robert Bosch Gmbh Scheinwerfer für ein Fahrzeug, Herstellungsverfahren für einen Scheinwerfer und Verfahren zum Beleuchten zumindest eines Teils einer Umgebung eines Fahrzeugs
DE102017204775A1 (de) * 2017-03-22 2018-09-27 Robert Bosch Gmbh Scheinwerfer für ein Fahrzeug und Herstellungsverfahren für einen Scheinwerfer

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EP0291475A2 (fr) 1987-05-13 1988-11-17 Paolo Soardo Phare pour véhicules avec distribution programmable de la lumière
DE102007055480B3 (de) 2007-11-21 2009-08-13 Audi Ag Beleuchtungsvorrichtung eines Fahrzeugs
DE102010028949A1 (de) * 2010-05-12 2011-11-17 Osram Gesellschaft mit beschränkter Haftung Scheinwerfermodul
DE102010048659A1 (de) * 2010-10-15 2012-04-19 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung eines Kraftfahrzeugs
US20130258689A1 (en) * 2012-04-03 2013-10-03 Sharp Kabushiki Kaisha Light-emitting device, floodlight, and vehicle headlight

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Publication number Priority date Publication date Assignee Title
DE102012209593B4 (de) * 2012-06-06 2021-08-12 Osram Gmbh Beleuchtungseinrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291475A2 (fr) 1987-05-13 1988-11-17 Paolo Soardo Phare pour véhicules avec distribution programmable de la lumière
DE102007055480B3 (de) 2007-11-21 2009-08-13 Audi Ag Beleuchtungsvorrichtung eines Fahrzeugs
DE102010028949A1 (de) * 2010-05-12 2011-11-17 Osram Gesellschaft mit beschränkter Haftung Scheinwerfermodul
DE102010048659A1 (de) * 2010-10-15 2012-04-19 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung eines Kraftfahrzeugs
US20130258689A1 (en) * 2012-04-03 2013-10-03 Sharp Kabushiki Kaisha Light-emitting device, floodlight, and vehicle headlight

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3434965A4 (fr) * 2016-03-24 2019-11-27 Koito Manufacturing Co., Ltd. Phare pour véhicule
US10731819B2 (en) 2016-03-24 2020-08-04 Koito Manufacturing Co., Ltd. Vehicle headlamp
DE102016217323A1 (de) 2016-09-12 2018-03-15 Osram Gmbh Lichtmodul zum Bereitstellen von Effektlicht
WO2018082224A1 (fr) * 2016-11-04 2018-05-11 武汉通畅汽车电子照明有限公司 Module optique de phare d'automobile à haute résolution et procédé de commande d'éclairage à faisceau élevé à haute résolution associé
CN110608413A (zh) * 2018-06-15 2019-12-24 株式会社小糸制作所 光学单元及车辆用前照灯
US11473750B2 (en) 2018-06-15 2022-10-18 Koito Manufacturing Co., Ltd. Optical unit with light source for light distribution and electromagnetic wave generator for detecting surrounding objects and vehicular lamp having the same

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EP3194839A1 (fr) 2017-07-26
EP3194839B1 (fr) 2022-02-23

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