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EP3108175B1 - Illuminating device for a motor vehicle, and associated method - Google Patents

Illuminating device for a motor vehicle, and associated method Download PDF

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Publication number
EP3108175B1
EP3108175B1 EP15704961.0A EP15704961A EP3108175B1 EP 3108175 B1 EP3108175 B1 EP 3108175B1 EP 15704961 A EP15704961 A EP 15704961A EP 3108175 B1 EP3108175 B1 EP 3108175B1
Authority
EP
European Patent Office
Prior art keywords
headlamp
radiation
light
headlight
light source
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP15704961.0A
Other languages
German (de)
French (fr)
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EP3108175A1 (en
Inventor
Carsten Gut
Ingo Rotscholl
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Audi AG
Original Assignee
Audi AG
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Filing date
Publication date
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Publication of EP3108175A1 publication Critical patent/EP3108175A1/en
Application granted granted Critical
Publication of EP3108175B1 publication Critical patent/EP3108175B1/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
    • F21S41/10—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
    • 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

Definitions

  • the present invention relates to a lighting device for a motor vehicle having a first headlight for providing a first light distribution having a first opening area and a second headlight for providing a second light distribution having a second opening area. Moreover, the present invention relates to a motor vehicle with such a lighting device. Finally, the present invention relates to a method for operating a lighting device for a motor vehicle.
  • LEDs light-emitting diodes
  • These LEDs are usually arranged in matrix form in the headlight and can be controlled individually or in groups. With the help of this LED technology, it is possible to fade in and fade out certain areas of the light distribution and thus implement adaptive headlight functions, such as a glare-free high beam.
  • headlights are known from the prior art, which use a laser as the light source.
  • the publication US 2009/0046474 A1 discloses such a headlight.
  • the light beams can be arbitrarily directed and distributed via a two-dimensional scanning system.
  • the intensity of light emitted by the light source can be adjusted by means of pulse width and pulse amplitude modulation.
  • a wide variety of light distributions can be provided with the headlight.
  • the headlamp includes a light modulator, which changes the emission characteristic of the light emitted by the semiconductor laser in a predetermined manner. In this way, different light distributions can be provided with the headlight.
  • the describes DE 10 2009 048 619 A1 a method for controlling a driving light of a vehicle with at least one headlight and at least one sensor for a detection of objects.
  • a special function of the driving light is activated.
  • at least one first light source of the headlight which is formed from one or more light-emitting diodes, is alternately activated and deactivated.
  • a second light source formed from one or more light-emitting diodes is controlled in such a way that light flashes are generated, wherein an optical axis of the second light source is aligned with the at least one object.
  • the headlight module further comprises at least one carrier device for the at least one phosphor, at least one excitation radiation source and at least one beam steering device which is arranged such that it directs radiation emitted by the at least one excitation radiation source onto the at least one phosphor.
  • a certain refresh rate must be used for flicker-free display the light distribution are provided. This applies in particular to the high beam distribution.
  • the scan speed must be provided by each headlamp for its given area.
  • the lighting device according to the invention for a motor vehicle comprises a first headlight for providing a first light distribution with a first opening area and a second headlight for providing a second light distribution with a second opening area, wherein the first and the second headlight are formed such that the first opening area and completely overlay the second opening area in a predetermined range.
  • the lighting device comprises two headlights, in particular headlights, with each of which a light distribution can be provided.
  • each of the light distributions has an opening area.
  • the opening areas do not differ or only in a small partial area.
  • the headlamps are designed such that the opening area of the first headlamp and the second headlamp completely overlap in a predetermined area. For example, a predetermined area can be illuminated both with the first headlight and with the second headlight. In this way, the application of the lighting device can be easily extended.
  • the headlights can also be designed such that a predetermined area of both headlights is completely illuminated.
  • the predetermined area may be arranged in the intended installation state of the headlights at a predetermined distance in front of the motor vehicle on a roadway. This is especially true when a dipped beam is provided by the headlamps.
  • the first light distribution of the first headlamp and the second light distribution of the second headlamp so chosen that the area that is usually illuminated otherwise with two headlamps, can now be illuminated simultaneously with both headlamps.
  • the first and the second headlight each have at least one light source for emitting radiation and a deflection device for deflecting the radiation emitted by the at least one light source.
  • the light source can be designed in particular as a semiconductor laser. It is also conceivable that each of the headlights includes multiple light sources.
  • the deflection device can be designed, for example, as a mirror, in particular as a micromirror. Alternatively, the deflection can be designed as an acousto-optical deflector. In this case, the deflection devices are designed or arranged such that the predetermined area can be completely illuminated with each headlight.
  • the deflection device of the first headlight and the deflection device of the second headlight deflect the radiation emitted by the respective at least one light source along a predetermined path in a line-shaped, column-shaped and / or grid-shaped manner.
  • the first and the second headlights may be designed in the manner of a laser scanner.
  • the frequency with which the respective deflection devices are operated is selected so that the deflection of the rays is not perceptible to the human eye.
  • the first and the second light distribution can be adjusted accordingly by a corresponding control of the deflection.
  • the deflection device of the first headlight deflects the radiation along the predetermined path offset in time from the radiation deflected by the deflection device of the second headlight.
  • the light beam emitted by the first headlight can be guided along the predetermined path offset in time from the light beam of the second headlight. This time-shifted operation makes it possible to operate the respective deflection devices at a reduced scanning speed.
  • the lighting device has a control device for adjusting the illuminance of the radiation emitted by the at least one light source of the first and / or the second headlight.
  • the at least one light source of the two headlights can be operated by means of pulse width modulation or pulse amplitude modulation.
  • the output with the respective light source radiation power can be adjusted accordingly.
  • the first and the second headlights each have a transducer element for converting the radiations emitted by the respective at least one light source into radiation having at least one other wavelength.
  • the transducer element for example, an element having fluorescent properties may be used which converts the radiation emitted from the light source and having a first wavelength into radiation having at least a second wavelength.
  • a low beam or a high beam can be provided with the first and the second headlight as light distribution.
  • a corresponding control of the deflection of the first and the second headlamp and different Abblertztver Alexandren or high beam distributions can be provided.
  • the motor vehicle according to the invention comprises the lighting device according to the invention.
  • the method according to the invention for operating a lighting device for a motor vehicle which comprises a first and a second headlight, comprises providing the first headlight with a first light distribution with a first opening area by means of the first headlight and providing the second headlight with a second light distribution with one second opening area with the second headlamp, wherein the first and the second light distribution are provided so that the first opening area and the second opening area are completely superposed in a predetermined range.
  • Radiation is radiated with a respective light source of the first and second headlamps and a deflector deflects the radiation emitted by the at least one light source.
  • the radiation emitted by the respective at least one light source is line-shaped, column-shaped and / or grid-shaped with the deflection device of the first headlight and with the deflection device of the second headlight along a predetermined path deflected, wherein the radiation is deflected with the deflection of the first headlight offset in time to the deflected by the deflection of the second headlight radiation along the predetermined path.
  • Fig. 1 shows in a highly simplified representation of the front portion of a motor vehicle 10.
  • the motor vehicle 10 includes a first headlight 12 and a second headlight 14. With the first headlight 12, a first light distribution 16 is provided and the second headlight 14, a second light distribution 18 is provided.
  • the first light distribution 16 has a first opening area 20 and the second light distribution 18 has a second opening area 22.
  • a light distribution 16 in the first opening area 20 can basically be provided with the first spotlight 12, and a second light distribution 18 in the second opening area 22 can basically be provided with the second spotlight 14 become.
  • the first opening area 20 and the second opening area 22 do not differ in the present example.
  • a first surface 24 can be illuminated with the first headlight 12 and a second surface 26 with the second headlight 14.
  • the first headlamp 12 and the second headlamp 14 may each include one or more light sources.
  • the light sources are preferably designed as semiconductor lasers.
  • each of the headlights 12, 14 comprises a deflection device, with which the radiation emitted by the respective light source can be deflected.
  • the deflection device can be designed, for example, as a micromirror or as an acousto-optical deflector.
  • each headlight 12, 14 comprises a transducer element which converts the radiation emitted by the light source and having a first wavelength into radiation having at least a second wavelength.
  • the transducer element may, for example, have fluorescent properties.
  • the radiation of the light source in the manner of a scanner can be directed to the transducer element in rows, columns or rasters.
  • the deflection device is operated, for example, with a frequency greater than 100 hertz, so that the scanning illumination of the transducer element can not be perceived by the human eye.
  • Fig. 2 shows in a schematic representation of the first surface 24, which is illuminated by the first headlight 12 and the second surface 26, which is illuminated by the second headlight 14.
  • the surfaces 24, 26 are shown in relation to a roadway 28.
  • the arrow 30 illustrates the light beam which is emitted by the first headlight 12 during scanning illumination of the surface 24.
  • the arrow 32 illustrates the light beam that is emitted by the second headlight 14 when illuminating the surface 26.
  • Fig. 3 shows in an analogous representation Fig. 1 a schematic representation of a motor vehicle 10 in a plan view.
  • the motor vehicle 10 comprises the illumination device 34 according to the invention.
  • the illumination device 34 also comprises a first headlight 12 and a second headlight 14.
  • a first light distribution 36 can be provided with the first headlight 12 and a second light distribution 38 with the second headlight 14.
  • the first light distribution 36 has a first one Opening portion 40
  • the second light distribution 38 has a second opening portion 42.
  • the headlights 12, 14 or their light distributions 36, 38 are designed such that the first opening area 40 and the second opening area 42 completely overlap in a predetermined area in front of the motor vehicle 10.
  • the first headlight 12 and the second headlight 14 or their light distributions 36, 38 are designed such that a predetermined area 46 can be illuminated in front of the motor vehicle 10 both with the first headlight 12 and with the second headlight 14.
  • Fig. 4 shows a schematic representation of the arrangement of the surface 46 with respect to the roadway 28.
  • the arrow 48 illustrates a light beam emitted from the first headlight 12 for illuminating the surface 46
  • the arrow 50 illustrates a light beam from the second headlight 14th for illuminating the surface 46 is output.
  • the headlights 12, 14 are formed in the manner of a laser scanner.
  • a dipped beam can be provided and in this case a predetermined area on the lane 28 of both headlamps 12, 14 are illuminated.
  • the headlamps 12, 14 are operated to guide the light beams provided with them along a predetermined path at a time offset from one another to illuminate an area on the roadway, ideally the refresh rate for each of the headlamps 12, 14 can be reduced to half be reduced.
  • the effective pulse time can be increased.
  • each of the headlights 12, 14 has n laser diodes as light sources, which can be switched on and off individually, there are 2 2n ways to combine the power levels by pulse width modulation.
  • the transducer element instead of a pulse with high energy, two time-shifted pulses, which have a lower energy, can be used.
  • the safety in the operation of the lighting device 36 can be increased.
  • the transducer element can be designed for a lower power density.
  • a certain synchronization of the headlights 12, 14 are provided in order to reduce the refresh rate with this approach maximum. This can be facilitated by using multiple light sources per headlamp 12, 14.
  • a dipped beam is provided by the headlights 12, 14, specific pixels can be controlled in a time-shifted manner by illuminating the transducer element, so that illumination intensities are superimposed on a surface, in particular a surface on the roadway 28.
  • pixel groups or intervals can be defined, which are controlled by the control of the deflection of the headlights 12, 14.
  • the interval size depends on the aperture angle of the pixels.
  • the pixel groups can be calculated based on the distance of the headlights 12, 14 from each other and the size of the individual pixels.
  • the pixel groups can be controlled so that they overlap within certain time intervals with a time shift. Due to the staggered control, the complete pixel groups can overlap to a predetermined light intensity. Thus, the effective refresh rate can be increased.

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

Description

Die vorliegende Erfindung betrifft eine Beleuchtungsvorrichtung für ein Kraftfahrzeug mit einem ersten Scheinwerfer zum Bereitstellen einer ersten Lichtverteilung mit einem ersten Öffnungsbereich und einem zweiten Scheinwerfer zum Bereitstellen einer zweiten Lichtverteilung mit einem zweiten Öffnungsbereich. Überdies betrifft die vorliegende Erfindung ein Kraftfahrzeug mit einer solchen Beleuchtungsvorrichtung. Schließlich betrifft die vorliegende Erfindung ein Verfahren zum Betreiben einer Beleuchtungsvorrichtung für ein Kraftfahrzeug.The present invention relates to a lighting device for a motor vehicle having a first headlight for providing a first light distribution having a first opening area and a second headlight for providing a second light distribution having a second opening area. Moreover, the present invention relates to a motor vehicle with such a lighting device. Finally, the present invention relates to a method for operating a lighting device for a motor vehicle.

In modernen Kraftfahrzeugen werden Scheinwerfer verwendet, die eine Mehrzahl von Leuchtdioden (LEDs) umfassen. Diese Leuchtdioden sind üblicherweise matrixförmig in dem Scheinwerfer angeordnet und können einzeln oder in Gruppen angesteuert werden. Mit Hilfe dieser LED-Technologie ist es möglich, bestimmte Bereiche der Lichtverteilung ein- und auszublenden und somit adaptive Scheinwerferfunktionen, wie etwa ein blendfreies Fernlicht, umzusetzen.In modern motor vehicles headlamps are used which comprise a plurality of light-emitting diodes (LEDs). These LEDs are usually arranged in matrix form in the headlight and can be controlled individually or in groups. With the help of this LED technology, it is possible to fade in and fade out certain areas of the light distribution and thus implement adaptive headlight functions, such as a glare-free high beam.

Darüber hinaus sind aus dem Stand der Technik Scheinwerfer bekannt, die als Lichtquelle einen Laser verwenden. Die Druckschrift US 2009/0046474 A1 offenbart einen solchen Scheinwerfer. Durch die Nutzung eines solchen Lasers sind prinzipiell höhere Leuchtdichten erzielbar und zudem können über ein zweidimensional scannendes System die Lichtstrahlen beliebig gelenkt und verteilt werden. Darüber hinaus kann die von der Lichtquelle abgegebene Beleuchtungsstärke mittels Pulsweiten- und Pulsamplitudenmodulation eingestellt werden. Somit können verschiedenste Lichtverteilungen mit dem Scheinwerfer bereitgestellt werden.In addition, headlights are known from the prior art, which use a laser as the light source. The publication US 2009/0046474 A1 discloses such a headlight. By using such a laser, in principle higher luminances can be achieved and, in addition, the light beams can be arbitrarily directed and distributed via a two-dimensional scanning system. In addition, the intensity of light emitted by the light source can be adjusted by means of pulse width and pulse amplitude modulation. Thus, a wide variety of light distributions can be provided with the headlight.

In diesem Zusammenhang beschreibt die DE 10 2008 022 795 A1 einen Scheinwerfer für ein Kraftfahrzeug, der als Lichtquelle zumindest einen Halbleiterlaser aufweist. Darüber hinaus umfasst der Scheinwerfer einen Lichtmodulator, der die Abstrahlcharakteristik des vom Halbleiterlaser abgestrahlten Lichts in vorgegebener Weise verändert. Auf diese Weise können unterschiedliche Lichtverteilungen mit dem Scheinwerfer bereitgestellt werden.In this context, the describes DE 10 2008 022 795 A1 a headlamp for a motor vehicle having as a light source at least one semiconductor laser. In addition, the headlamp includes a light modulator, which changes the emission characteristic of the light emitted by the semiconductor laser in a predetermined manner. In this way, different light distributions can be provided with the headlight.

Ferner beschreibt die DE 10 2009 048 619 A1 ein Verfahren zur Steuerung eines Fahrtlichts eines Fahrzeugs mit zumindest einem Scheinwerfer und zumindest einem Sensor zu einer Detektion von Objekten. Dabei wird bei einer Kollisionsgefahr eine Sonderfunktion des Fahrtlichts aktiviert. Hierbei wird bei einer Kollisionsgefahr mit dem zumindest einen Objekt zumindest eine aus einer oder mehreren Leuchtdioden gebildete erste Lichtquelle des Scheinwerfers abwechselnd aktiviert und deaktiviert. Eine aus einer oder mehreren Leuchtdioden gebildete zweite Lichtquelle wird derart angesteuert, dass Lichtblitze erzeugt werden, wobei eine optische Achse der zweiten Lichtquelle auf das zumindest eine Objekt ausgerichtet wird.Furthermore, the describes DE 10 2009 048 619 A1 a method for controlling a driving light of a vehicle with at least one headlight and at least one sensor for a detection of objects. In the event of a collision hazard, a special function of the driving light is activated. In this case, in the case of a risk of collision with the at least one object, at least one first light source of the headlight, which is formed from one or more light-emitting diodes, is alternately activated and deactivated. A second light source formed from one or more light-emitting diodes is controlled in such a way that light flashes are generated, wherein an optical axis of the second light source is aligned with the at least one object.

Darüber hinaus offenbart die DE 10 2011 121 603 A1 eine Scheinwerferanordnung für ein Fahrzeug mit einer rechten Scheinwerfereinheit, die zumindest eine Lichtquelle und optische Einrichtungen zum Erzeugen einer ersten Teillichtemission umfasst, die bei einer vorderen Hell-Dunkel-Grenze einer Abblendlichtverteilung einen ersten Seitenbereich vor dem Fahrzeug ausleuchtet und bei der vorderen Hell-Dunkel-Grenze der Abblendlichtverteilung einen zweiten Seitenbereich vor dem Fahrzeug im Wesentlichen nicht ausleuchtet, und einer linken Scheinwerfereinheit, die zumindest eine Lichtquelle und optische Einrichtungen zum Erzeugen einer zweiten Teillichtemission umfasst, die bei der vorderen Hell-Dunkel-Grenze der Abblendlichtverteilung den zweiten Seitenbereich vor dem Fahrzeug ausleuchtet und den ersten Seitenbereich bei der vorderen Hell-Dunkel-Grenze der Abblendlichtverteilung im Wesentlichen nicht ausleuchtet.In addition, the reveals DE 10 2011 121 603 A1 a headlamp assembly for a vehicle having a right headlamp unit comprising at least one light source and optical means for generating a first partial light emission which illuminates a first side area in front of the vehicle at a front light and dark boundary of a low beam distribution and at the front light and dark Limit of the low beam distribution does not substantially illuminate a second side area in front of the vehicle, and a left headlamp unit comprising at least one light source and optical devices for generating a second partial light emission, which at the front light and dark boundary of the low beam distribution, the second side area in front of the vehicle illuminates and does not substantially illuminate the first side area at the front light-dark boundary of the low beam distribution.

Zudem ist aus der DE 10 2010 028 949 A1 ein Scheinwerfermodul mit mindestens einem Leuchtstoff bekannt. Das Scheinwerfermodul umfasst weiterhin mindestens eine Trägervorrichtung für den mindestens einen Leuchtstoff, mindestens eine Anregungsstrahlungsquelle und mindestens eine Strahllenkungsvorrichtung, die derart angeordnet ist, dass sie von der mindestens einen Anregungsstrahlungsquelle abgegebene Strahlung auf den mindestens einen Leuchtstoff lenkt.Moreover, from the DE 10 2010 028 949 A1 a headlamp module with at least one phosphor known. The headlight module further comprises at least one carrier device for the at least one phosphor, at least one excitation radiation source and at least one beam steering device which is arranged such that it directs radiation emitted by the at least one excitation radiation source onto the at least one phosphor.

Bei einem Scheinwerfer, der auf einem zweidimensionalen Laserscanner basiert, muss eine bestimmte Bildwiederholfrequenz zur flimmerfreien Darstellung der Lichtverteilung bereitgestellt werden. Dies gilt insbesondere für die Fernlichtverteilung. Die Scangeschwindigkeit muss von jedem Scheinwerfer für seinen vorgegebenen Bereich bereitgestellt werden.For a headlamp based on a two-dimensional laser scanner, a certain refresh rate must be used for flicker-free display the light distribution are provided. This applies in particular to the high beam distribution. The scan speed must be provided by each headlamp for its given area.

Es ist Aufgabe der vorliegenden Erfindung, eine Beleuchtungsvorrichtung für ein Kraftfahrzeug sicherer und effizienter zu betreiben.It is an object of the present invention to operate a lighting device for a motor vehicle safer and more efficient.

Diese Aufgabe wird durch eine Beleuchtungsvorrichtung mit den Merkmalen des Patentanspruchs 1 und ein Verfahren mit den Merkmalen des Patentanspruchs 6 gelöst. Vorteilhafte Weiterbildungen der vorliegenden Erfindung sind Gegenstand der abhängigen Ansprüche.This object is achieved by a lighting device having the features of patent claim 1 and a method having the features of patent claim 6. Advantageous developments of the present invention are the subject of the dependent claims.

Die erfindungsgemäße Beleuchtungsvorrichtung für ein Kraftfahrzeug umfasst einen ersten Scheinwerfer zum Bereitstellen einer ersten Lichtverteilung mit einem ersten Öffnungsbereich und einen zweiten Scheinwerfer zum Bereitstellen einer zweiten Lichtverteilung mit einem zweiten Öffnungsbereich, wobei der erste und der zweite Scheinwerfer so ausgebildet sind, dass sich der erste Öffnungsbereich und der zweite Öffnungsbereich in einem vorbestimmten Bereich vollständig überlagern.The lighting device according to the invention for a motor vehicle comprises a first headlight for providing a first light distribution with a first opening area and a second headlight for providing a second light distribution with a second opening area, wherein the first and the second headlight are formed such that the first opening area and completely overlay the second opening area in a predetermined range.

Die erfindungsgemäße Beleuchtungsvorrichtung umfasst zwei Scheinwerfer, insbesondere Frontscheinwerfer, mit denen jeweils eine Lichtverteilung bereitgestellt werden kann. Dabei weist jede der Lichtverteilungen einen Öffnungsbereich auf. Bei herkömmlichen Scheinwerfern überscheiden sich die Öffnungsbereiche nicht oder nur in einem geringen Teilbereich. Vorliegend sind die Scheinwerfer derart ausgestaltet, dass sich der Öffnungsbereich des ersten Scheinwerfers und des zweiten Scheinwerfers in einem vorbestimmten Bereich vollständig überlagern. So kann beispielsweise ein vorbestimmter Bereich sowohl mit dem ersten Scheinwerfer als auch mit dem zweiten Scheinwerfer beleuchtet werden. Auf diese Weise kann der Einsatzbereich der Beleuchtungsvorrichtung auf einfache Weise erweitert werden.The lighting device according to the invention comprises two headlights, in particular headlights, with each of which a light distribution can be provided. In this case, each of the light distributions has an opening area. In conventional headlamps, the opening areas do not differ or only in a small partial area. In the present case, the headlamps are designed such that the opening area of the first headlamp and the second headlamp completely overlap in a predetermined area. For example, a predetermined area can be illuminated both with the first headlight and with the second headlight. In this way, the application of the lighting device can be easily extended.

Die Scheinwerfer können auch derart ausgebildet sein, dass eine vorbestimmte Fläche von beiden Scheinwerfern vollständig beleuchtet wird. Die vorbestimmte Fläche kann im bestimmungsgemäßen Einbauzustand der Scheinwerfer in einem vorbestimmten Abstand vor dem Kraftfahrzeug auf einer Fahrbahn angeordnet sein. Dies trifft insbesondere zu, wenn mit den Scheinwerfern ein Abblendlicht bereitgestellt wird. Mit anderen Worten sind die erste Lichtverteilung des ersten Scheinwerfers und die zweite Lichtverteilung des zweiten Scheinwerfers so gewählt, dass der Bereich, der üblicherweise sonst mit zwei Scheinwerfern ausgeleuchtet wird, nun mit beiden Scheinwerfern gleichzeitig ausgeleuchtet werden kann.The headlights can also be designed such that a predetermined area of both headlights is completely illuminated. The predetermined area may be arranged in the intended installation state of the headlights at a predetermined distance in front of the motor vehicle on a roadway. This is especially true when a dipped beam is provided by the headlamps. In other words, the first light distribution of the first headlamp and the second light distribution of the second headlamp so chosen that the area that is usually illuminated otherwise with two headlamps, can now be illuminated simultaneously with both headlamps.

Ferner weisen der erste und der zweite Scheinwerfer jeweils zumindest eine Lichtquelle zum Abstrahlen einer Strahlung und eine Ablenkeinrichtung zum Ablenken der von der zumindest einen Lichtquelle abgestrahlten Strahlung auf. Die Lichtquelle kann insbesondere als Halbleiterlaser ausgebildet sein. Dabei ist es auch denkbar, dass jeder der Scheinwerfer mehrere Lichtquellen umfasst. Die Ablenkeinrichtung kann beispielsweise als Spiegel, insbesondere als Mikrospiegel, ausgebildet sein. Alternativ dazu kann die Ablenkeinrichtung als akustooptischer Deflektor ausgebildet sein. Dabei sind die Ablenkeinrichtungen derart ausgebildet beziehungsweise angeordnet, dass mit jedem Scheinwerfer die vorbestimmte Fläche vollständig ausgeleuchtet werden kann.Furthermore, the first and the second headlight each have at least one light source for emitting radiation and a deflection device for deflecting the radiation emitted by the at least one light source. The light source can be designed in particular as a semiconductor laser. It is also conceivable that each of the headlights includes multiple light sources. The deflection device can be designed, for example, as a mirror, in particular as a micromirror. Alternatively, the deflection can be designed as an acousto-optical deflector. In this case, the deflection devices are designed or arranged such that the predetermined area can be completely illuminated with each headlight.

Des Weiteren lenken die Ablenkeinrichtung des ersten Scheinwerfers und die Ablenkeinrichtung des zweiten Scheinwerfers zum Bereitstellen der ersten und der zweiten Lichtverteilung die von der jeweiligen zumindest einen Lichtquelle abgestrahlte Strahlung entlang einer vorbestimmten Bahn zeilenförmig, spaltenförmig und/oder rasterförmig ab. Der erste und der zweite Scheinwerfer können nach Art eines Laserscanners ausgebildet sein. Bevorzugt ist die Frequenz, mit der die jeweiligen Ablenkeinrichtungen betrieben werden, so gewählt, dass die Ablenkung der Strahlen mit dem menschlichen Auge nicht wahrnehmbar ist. Somit können die erste und die zweite Lichtverteilung durch eine entsprechende Ansteuerung der Ablenkeinrichtungen entsprechend angepasst werden.Furthermore, in order to provide the first and the second light distribution, the deflection device of the first headlight and the deflection device of the second headlight deflect the radiation emitted by the respective at least one light source along a predetermined path in a line-shaped, column-shaped and / or grid-shaped manner. The first and the second headlights may be designed in the manner of a laser scanner. Preferably, the frequency with which the respective deflection devices are operated is selected so that the deflection of the rays is not perceptible to the human eye. Thus, the first and the second light distribution can be adjusted accordingly by a corresponding control of the deflection.

Zudem lenkt die Ablenkeinrichtung des ersten Scheinwerfers die Strahlung zeitlich versetzt zu der von der Ablenkeinrichtung des zweiten Scheinwerfers abgelenkten Strahlung entlang der vorbestimmten Bahn ab. Der Lichtstrahl, der von dem ersten Scheinwerfer ausgegeben wird, kann entlang der vorbestimmten Bahn zeitlich versetzt zu dem Lichtstrahl des zweiten Scheinwerfers geführt werden. Dieser zeitversetzte Betrieb ermöglicht es, die jeweiligen Ablenkeinrichtungen mit einer reduzierten Scangeschwindigkeit zu betreiben.In addition, the deflection device of the first headlight deflects the radiation along the predetermined path offset in time from the radiation deflected by the deflection device of the second headlight. The light beam emitted by the first headlight can be guided along the predetermined path offset in time from the light beam of the second headlight. This time-shifted operation makes it possible to operate the respective deflection devices at a reduced scanning speed.

Bevorzugt weist die Beleuchtungsvorrichtung eine Steuereinrichtung zum Einstellen der Beleuchtungsstärke der mit der zumindest einen Lichtquelle des ersten und/oder des zweiten Scheinwerfers abgestrahlten Strahlung auf. Beispielsweise kann die zumindest eine Lichtquelle der beiden Scheinwerfer mittels Pulsweitenmodulation oder Pulsamplitudenmodulation betrieben werden. Somit kann die mit der jeweiligen Lichtquelle abgegebene Strahlungsleistung entsprechend eingestellt werden.Preferably, the lighting device has a control device for adjusting the illuminance of the radiation emitted by the at least one light source of the first and / or the second headlight. For example, the at least one light source of the two headlights can be operated by means of pulse width modulation or pulse amplitude modulation. Thus, the output with the respective light source radiation power can be adjusted accordingly.

In einer weiteren Ausgestaltung weisen der erste und der zweite Scheinwerfer jeweils ein Wandlerelement zum Wandeln der von der jeweiligen zumindest einen Lichtquelle abgestrahlten Strahlungen in eine Strahlung mit zumindest einer anderen Wellenlänge auf. Als Wandlerelement kann beispielsweise ein Element mit fluoreszierenden Eigenschaften verwendet werden, das die Strahlung, die von der Lichtquelle abgegeben wird und die eine erste Wellenlängen aufweist, in eine Strahlung mit zumindest einer zweiten Wellenlänge wandelt.In a further refinement, the first and the second headlights each have a transducer element for converting the radiations emitted by the respective at least one light source into radiation having at least one other wavelength. As the transducer element, for example, an element having fluorescent properties may be used which converts the radiation emitted from the light source and having a first wavelength into radiation having at least a second wavelength.

Bevorzugt sind mit dem ersten und dem zweiten Scheinwerfer als Lichtverteilung ein Abblendlicht oder ein Fernlicht bereitstellbar. Durch eine entsprechende Ansteuerung der Ablenkeinrichtungen des ersten und des zweiten Scheinwerfers können auch unterschiedliche Abblendlichtverteilungen oder Fernlichtverteilungen bereitgestellt werden.Preferably, a low beam or a high beam can be provided with the first and the second headlight as light distribution. By a corresponding control of the deflection of the first and the second headlamp and different Abblendlichtverteilungen or high beam distributions can be provided.

Das erfindungsgemäße Kraftfahrzeug umfasst die erfindungsgemäße Beleuchtungsvorrichtung.The motor vehicle according to the invention comprises the lighting device according to the invention.

Das erfindungsgemäße Verfahren zum Betreiben einer Beleuchtungsvorrichtung für ein Kraftfahrzeug, das einen ersten und einen zweiten Scheinwerfer umfasst, beinhaltet das Bereitstellen des ersten Scheinwerfers mit einer ersten Lichtverteilung mit einem ersten Öffnungsbereich mittels des ersten Scheinwerfers und das Bereitstellen des zweiten Scheinwerfers mit einer zweiten Lichtverteilung mit einem zweiten Öffnungsbereich mit dem zweiten Scheinwerfer, wobei die erste und die zweite Lichtverteilung so bereitgestellt werden, dass der erste Öffnungsbereich und der zweite Öffnungsbereich in einem vorbestimmten Bereich vollständig überlagert werden. Eine Strahlung wird mit einer jeweiligen Lichtquelle des ersten und des zweiten Scheinwerfers abgestrahlt und mit einer Ablenkeinrichtung wird die von der zumindest einen Lichtquelle abgestrahlten Strahlung abgelenkt. Zum Bereitstellen der ersten und der zweiten Lichtverteilung wird die von der jeweiligen zumindest einen Lichtquelle abgestrahlte Strahlung mit der Ablenkeinrichtung des ersten Scheinwerfers und mit der Ablenkeinrichtung des zweiten Scheinwerfers entlang einer vorbestimmten Bahn zeilenförmig, spaltenförmig und/oder rasterförmig abgelenkt, wobei die Strahlung mit der Ablenkeinrichtung des ersten Scheinwerfers zeitlich versetzt zu der von der Ablenkeinrichtung des zweiten Scheinwerfers abgelenkten Strahlung entlang der vorbestimmten Bahn abgelenkt wird.The method according to the invention for operating a lighting device for a motor vehicle, which comprises a first and a second headlight, comprises providing the first headlight with a first light distribution with a first opening area by means of the first headlight and providing the second headlight with a second light distribution with one second opening area with the second headlamp, wherein the first and the second light distribution are provided so that the first opening area and the second opening area are completely superposed in a predetermined range. Radiation is radiated with a respective light source of the first and second headlamps and a deflector deflects the radiation emitted by the at least one light source. In order to provide the first and the second light distribution, the radiation emitted by the respective at least one light source is line-shaped, column-shaped and / or grid-shaped with the deflection device of the first headlight and with the deflection device of the second headlight along a predetermined path deflected, wherein the radiation is deflected with the deflection of the first headlight offset in time to the deflected by the deflection of the second headlight radiation along the predetermined path.

Die zuvor im Zusammenhang mit der erfindungsgemäßen Beleuchtungsvorrichtung beschriebenen Vorteile und Weiterbildungen gelten sinngemäß für das erfindungsgemäße Kraftfahrzeug und das erfindungsgemäße Verfahren.The advantages and further developments described above in connection with the lighting device according to the invention apply mutatis mutandis to the motor vehicle according to the invention and the inventive method.

Die vorliegende Erfindung wird nun anhand der beigefügten Zeichnungen näher erläutert. Dabei zeigen:

Fig. 1
eine schematische Darstellung eines Kraftfahrzeugs, in der die Lichtverteilungen eines ersten und eines zweiten Scheinwerfers dargestellt sind;
Fig. 2
eine schematische Darstellung der mit den Scheinwerfern gemäß Fig. 1 beleuchteten Flächen bezüglich einer Fahrbahn;
Fig. 3
eine schematische Darstellung eines Kraftfahrzeugs, in der die Lichtverteilung eines ersten oder eines zweiten Scheinwerfers dargestellt sind; und
Fig. 4
die mit den Scheinwerfern gemäß Fig. 3 beleuchtete Fläche bezüglich einer Fahrbahn.
The present invention will now be explained in more detail with reference to the accompanying drawings. Showing:
Fig. 1
a schematic representation of a motor vehicle, in which the light distributions of a first and a second headlamp are shown;
Fig. 2
a schematic representation of the headlamps according to Fig. 1 illuminated surfaces with respect to a roadway;
Fig. 3
a schematic representation of a motor vehicle, in which the light distribution of a first or a second headlamp are shown; and
Fig. 4
according to the headlamps Fig. 3 illuminated area with respect to a roadway.

Die nachfolgend näher geschilderten Ausführungsbeispiele stellen bevorzugte Ausführungsformen der vorliegenden Erfindung dar.The embodiments described in more detail below represent preferred embodiments of the present invention.

Fig. 1 zeigt in einer stark vereinfachten Darstellung den Frontbereich eines Kraftfahrzeugs 10. Das Kraftfahrzeug 10 umfasst einen ersten Scheinwerfer 12 und einen zweiten Scheinwerfer 14. Mit dem ersten Scheinwerfer 12 wird eine erste Lichtverteilung 16 bereitgestellt und mit dem zweiten Scheinwerfer 14 wird eine zweite Lichtverteilung 18 bereitgestellt. Dabei weist die erste Lichtverteilung 16 einen ersten Öffnungsbereich 20 und die zweite Lichtverteilung 18 einen zweiten Öffnungsbereich 22 auf. D. h. mit dem ersten Scheinwerfer 12 kann grundsätzlich eine Lichtverteilung 16 in dem ersten Öffnungsbereich 20 und mit dem zweiten Scheinwerfer 14 kann grundsätzlich eine zweite Lichtverteilung 18 in dem zweiten Öffnungsbereich 22 bereitgestellt werden. Der erste Öffnungsbereich 20 und der zweite Öffnungsbereich 22 überscheiden sich in dem vorliegenden Beispiel nicht. In einem vorbestimmten Abstand zu dem Kraftfahrzeug 10 kann mit dem ersten Scheinwerfer 12 eine erste Fläche 24 und mit dem zweiten Scheinwerfer 14 eine zweite Fläche 26 beleuchtet werden. Fig. 1 shows in a highly simplified representation of the front portion of a motor vehicle 10. The motor vehicle 10 includes a first headlight 12 and a second headlight 14. With the first headlight 12, a first light distribution 16 is provided and the second headlight 14, a second light distribution 18 is provided. In this case, the first light distribution 16 has a first opening area 20 and the second light distribution 18 has a second opening area 22. Ie. A light distribution 16 in the first opening area 20 can basically be provided with the first spotlight 12, and a second light distribution 18 in the second opening area 22 can basically be provided with the second spotlight 14 become. The first opening area 20 and the second opening area 22 do not differ in the present example. At a predetermined distance from the motor vehicle 10, a first surface 24 can be illuminated with the first headlight 12 and a second surface 26 with the second headlight 14.

Der erste Scheinwerfer 12 und der zweite Scheinwerfer 14 können jeweils eine oder mehrere Lichtquellen umfassen. Die Lichtquellen sind bevorzugt als Halbleiterlaser ausgebildet. Des Weiteren umfasst jeder der Scheinwerfer 12, 14 eine Ablenkeinrichtung, mit der die Strahlung, die von der jeweiligen Lichtquelle ausgesendet wird, abgelenkt werden kann. Die Ablenkeinrichtung kann beispielsweise als Mikrospiegel oder als akustooptischer Deflektor ausgebildet sein. Des Weiteren umfasst jeder Scheinwerfer 12, 14 ein Wandlerelement, das die Strahlung, die von der Lichtquelle ausgesendet wird und die eine erste Wellenlänge aufweist, in eine Strahlung mit zumindest einer zweiten Wellenlänge wandelt. Das Wandlerelement kann beispielsweise fluoreszierende Eigenschaften aufweisen. Mit der jeweiligen Ablenkeinrichtung kann die Strahlung der Lichtquelle nach Art eines Scanners zeilenweise, spaltenweise oder rasterförmig auf das Wandlerelement gelenkt werden. Die Ablenkeinrichtung wird beispielsweise mit einer Frequenz größer als 100 Hertz betrieben, so dass das scannende Beleuchten des Wandlerelements von dem menschlichen Auge nicht wahrgenommen werden kann.The first headlamp 12 and the second headlamp 14 may each include one or more light sources. The light sources are preferably designed as semiconductor lasers. Furthermore, each of the headlights 12, 14 comprises a deflection device, with which the radiation emitted by the respective light source can be deflected. The deflection device can be designed, for example, as a micromirror or as an acousto-optical deflector. Furthermore, each headlight 12, 14 comprises a transducer element which converts the radiation emitted by the light source and having a first wavelength into radiation having at least a second wavelength. The transducer element may, for example, have fluorescent properties. With the respective deflection device, the radiation of the light source in the manner of a scanner can be directed to the transducer element in rows, columns or rasters. The deflection device is operated, for example, with a frequency greater than 100 hertz, so that the scanning illumination of the transducer element can not be perceived by the human eye.

Fig. 2 zeigt in einer schematischen Darstellung die erste Fläche 24, die von dem ersten Scheinwerfer 12 beleuchtet wird und die zweite Fläche 26, die von dem zweiten Scheinwerfer 14 beleuchtet wird. Die Flächen 24, 26 sind hierbei in Bezug zu einer Fahrbahn 28 dargestellt. Der Pfeil 30 verdeutlicht dabei den Lichtstrahl, der von dem ersten Scheinwerfer 12 beim scannenden Beleuchten der Fläche 24 abgegeben wird. Der Pfeil 32 verdeutlicht den Lichtstrahl, der von dem zweiten Scheinwerfer 14 beim Beleuchten der Fläche 26 abgegeben wird. Fig. 2 shows in a schematic representation of the first surface 24, which is illuminated by the first headlight 12 and the second surface 26, which is illuminated by the second headlight 14. The surfaces 24, 26 are shown in relation to a roadway 28. The arrow 30 illustrates the light beam which is emitted by the first headlight 12 during scanning illumination of the surface 24. The arrow 32 illustrates the light beam that is emitted by the second headlight 14 when illuminating the surface 26.

Fig. 3 zeigt in analoger Darstellung zu Fig. 1 eine schematische Darstellung eines Kraftfahrzeugs 10 in einer Draufsicht. Hierbei umfasst das Kraftfahrzeug 10 die erfindungsgemäße Beleuchtungsvorrichtung 34. Auch die Beleuchtungsvorrichtung 34 umfasst einen ersten Scheinwerfer 12 und einen zweiten Scheinwerfer 14. Mit dem ersten Scheinwerfer 12 kann eine erste Lichtverteilung 36 und mit dem zweiten Scheinwerfer 14 eine zweite Lichtverteilung 38 bereitgestellt werden. Die erste Lichtverteilung 36 weist einen ersten Öffnungsbereich 40, und die zweite Lichtverteilung 38 weist einen zweiten Öffnungsbereich 42 auf. Dabei sind die Scheinwerfer 12, 14 beziehungsweise deren Lichtverteilungen 36, 38 so ausgebildet, dass sich der erste Öffnungsbereich 40 und der zweite Öffnungsbereich 42 in einem vorbestimmten Bereich vor dem Kraftfahrzeug 10 vollständig überlagern. Mit anderen Worten kann der erste Scheinwerfer 12 und der zweite Scheinwerfer 14 beziehungsweise deren Lichtverteilungen 36, 38 derart ausgebildet, dass eine vorbestimmte Fläche 46 vor dem Kraftfahrzeug 10 sowohl mit dem ersten Scheinwerfer 12 als auch mit dem zweiten Scheinwerfer 14 beleuchtet werden kann. Fig. 3 shows in an analogous representation Fig. 1 a schematic representation of a motor vehicle 10 in a plan view. In this case, the motor vehicle 10 comprises the illumination device 34 according to the invention. The illumination device 34 also comprises a first headlight 12 and a second headlight 14. A first light distribution 36 can be provided with the first headlight 12 and a second light distribution 38 with the second headlight 14. The first light distribution 36 has a first one Opening portion 40, and the second light distribution 38 has a second opening portion 42. The headlights 12, 14 or their light distributions 36, 38 are designed such that the first opening area 40 and the second opening area 42 completely overlap in a predetermined area in front of the motor vehicle 10. In other words, the first headlight 12 and the second headlight 14 or their light distributions 36, 38 are designed such that a predetermined area 46 can be illuminated in front of the motor vehicle 10 both with the first headlight 12 and with the second headlight 14.

Fig. 4 zeigt in einer schematischen Darstellung die Anordnung der Fläche 46 bezüglich der Fahrbahn 28. Der Pfeil 48 verdeutlicht einen Lichtstrahl, der von dem ersten Scheinwerfer 12 zum Beleuchten der Fläche 46 ausgegeben wird, und der Pfeil 50 verdeutlicht einen Lichtstrahl, der von dem zweiten Scheinwerfer 14 zum Beleuchten der Fläche 46 ausgegeben wird. Auch in diesem Ausführungsbeispiel sind die Scheinwerfer 12, 14 nach Art eines Laserscanners ausgebildet. Fig. 4 shows a schematic representation of the arrangement of the surface 46 with respect to the roadway 28. The arrow 48 illustrates a light beam emitted from the first headlight 12 for illuminating the surface 46, and the arrow 50 illustrates a light beam from the second headlight 14th for illuminating the surface 46 is output. Also in this embodiment, the headlights 12, 14 are formed in the manner of a laser scanner.

Mit den Scheinwerfern 12, 14 kann beispielsweise ein Abblendlicht bereitgestellt werden und hierbei eine vorbestimmte Fläche auf der Fahrbahn 28 von beiden Scheinwerfern 12, 14 beleuchtet werden. Damit verdoppelt sich die Auflösung des Scheinwerfers, was wiederum mit einer Erhöhung der für die Scans benötigten Zeit einhergeht. Wenn die Scheinwerfer 12, 14 derart betrieben werden, dass die mit ihnen bereitgestellten Lichtstrahlen zeitlich versetzt zueinander entlang einer vorbestimmten Bahn geführt werden, um eine Fläche auf der Fahrbahn zu beleuchten, kann im Idealfall die Bildwiederholfrequenz für jeden der Scheinwerfer 12, 14 auf die Hälfte reduziert werden. Somit kann die effektive Pulszeit erhöht werden. Für den Fall, dass jeder der Scheinwerfer 12, 14 n Laserdioden als Lichtquellen aufweist, die einzeln an- und ausgeschaltet werden können, ergeben sich 22n Möglichkeiten, die Leistungsstufen durch Pulsweitenmodulation zu kombinieren. Werden zwei separate Scheinwerfer verwendet, stehen nur 2n Kombinationsmöglichkeiten zur Verfügung. Ein weiterer Vorteil ergibt sich dadurch, dass bei der Beleuchtung des Wandlerelements anstelle von einem Puls mit hoher Energie zwei zeitversetzte Pulse, die eine geringere Energie aufweisen, verwendet werden können. Somit kann die Sicherheit beim Betrieb der Beleuchtungsvorrichtung 36 erhöht werden. Zudem kann das Wandlerelement für eine geringere Leistungsdichte ausgelegt werden.With the headlamps 12, 14, for example, a dipped beam can be provided and in this case a predetermined area on the lane 28 of both headlamps 12, 14 are illuminated. This doubles the resolution of the headlamp, which in turn leads to an increase in the time required for the scans. When the headlamps 12, 14 are operated to guide the light beams provided with them along a predetermined path at a time offset from one another to illuminate an area on the roadway, ideally the refresh rate for each of the headlamps 12, 14 can be reduced to half be reduced. Thus, the effective pulse time can be increased. In the event that each of the headlights 12, 14 has n laser diodes as light sources, which can be switched on and off individually, there are 2 2n ways to combine the power levels by pulse width modulation. If two separate headlamps are used, only 2 n combination options are available. Another advantage results from the fact that in the illumination of the transducer element, instead of a pulse with high energy, two time-shifted pulses, which have a lower energy, can be used. Thus, the safety in the operation of the lighting device 36 can be increased. In addition, the transducer element can be designed for a lower power density.

Darüber hinaus kann eine gewisse Synchronisation der Scheinwerfer 12, 14 vorgesehen werden, um die Bildwiederholfrequenz mit diesem Ansatz maximal verkleinern zu können. Dies kann dadurch erleichtert werden, dass mehrere Lichtquellen pro Scheinwerfer 12, 14 verwendet werden.In addition, a certain synchronization of the headlights 12, 14 are provided in order to reduce the refresh rate with this approach maximum. This can be facilitated by using multiple light sources per headlamp 12, 14.

Wenn mit den Scheinwerfern 12, 14 ein Abblendlicht bereitgestellt wird, können durch Beleuchtung des Wandlerelements konkrete Pixel zeitversetzt angesteuert werden, so dass sich Beleuchtungsstärken auf einer Fläche, insbesondere einer Fläche auf der Fahrbahn 28, überlagern.If a dipped beam is provided by the headlights 12, 14, specific pixels can be controlled in a time-shifted manner by illuminating the transducer element, so that illumination intensities are superimposed on a surface, in particular a surface on the roadway 28.

Wenn mit den Scheinwerfern 12, 14 ein Fernlicht bereitgestellt wird, können Pixelgruppen bzw. Intervalle definiert werden, die durch die Ansteuerung des Ablenkeinrichtungen der Scheinwerfer 12, 14 angesteuert werden. Hierbei ist die Intervallgröße abhängig von dem Öffnungswinkel der Pixel. Zudem können die Pixelgruppen anhand des Abstands der Scheinwerfer 12, 14 zueinander und der Größe der einzelnen Pixel berechnet werden. Die Pixelgruppen können dabei so angesteuert werden, dass sie sich innerhalb bestimmter Zeitintervalle zeitversetzt überlappen. Durch die zeitlich versetzte Ansteuerung können sich die kompletten Pixelgruppen zu einer vorbestimmten Lichtstärke überlagern. Somit kann die effektive Bildwiederholfrequenz vergrößert werden.If a high beam is provided with the headlamps 12, 14, pixel groups or intervals can be defined, which are controlled by the control of the deflection of the headlights 12, 14. Here, the interval size depends on the aperture angle of the pixels. In addition, the pixel groups can be calculated based on the distance of the headlights 12, 14 from each other and the size of the individual pixels. The pixel groups can be controlled so that they overlap within certain time intervals with a time shift. Due to the staggered control, the complete pixel groups can overlap to a predetermined light intensity. Thus, the effective refresh rate can be increased.

Claims (6)

  1. Illuminating device (34) for a motor vehicle (10), having
    - a first headlamp (12) for providing a first light distribution (36) having a first opening range (40), and
    - a second headlamp (14) for providing a second light distribution (38) having a second opening range (42), wherein
    - the first and the second headlamp (12, 14) are designed in such a way that the first opening range (40) and the second opening range (42) completely overlap in a predetermined area, and wherein
    - the first and the second headlamp (12, 14) each have at least one light source for emitting radiation and a deflecting device for deflecting the radiation emitted by the at least one light source,
    characterised in that
    - in order to provide the first and the second light distribution (36, 38), the deflecting device of the first headlamp (12) and the deflecting device of the second headlamp (14) deflect the radiation emitted by the respective at least one light source along a predetermined path in the form of lines, in the form of columns and/or in the form of a grid, and
    - the deflecting device of the first headlamp (12) deflects the radiation along the predetermined path with a time delay with respect to the radiation deflected by the deflecting device of the second headlamp (14).
  2. Illuminating device (34) according to claim 1,
    characterised in that
    the illuminating device (34) has a control device for adjusting an illumination intensity of the radiation emitted with the at least one light source of the first and/or of the second headlamp (12, 14);
  3. Illuminating device (34) according to any one of the preceding claims, characterised in that
    the first and the second headlamp (12, 14) each have a transformer element for transforming the radiation emitted by the respective at least one light source into radiation with at least one different wavelength;
  4. Illuminating device (34) according to any one of the preceding claims, characterised in that
    a dipped beam or a high beam can be provided with the first and the second headlamp (12, 14) as the light distribution (36, 38).
  5. Motor vehicle (10) having an illuminating device (34) according to any one of the preceding claims.
  6. Method for operating an illuminating device (34) for a motor vehicle (10), which comprises a first and a second headlamp (12, 14), by
    - providing the first headlamp (12) with a first light distribution (36) having a first opening range (40), and
    - providing the second headlamp (14) with a second light distribution (18) having a second opening range (42) with the second headlamp (14), wherein
    - the first and the second headlamp (12, 14) are provided in such a way that the first opening range (40) and the second opening range (42) are completely overlapped in a predetermined area,
    - radiation is emitted with a respective light source of the first and of the second headlamp (12, 14) and the radiation emitted by the at least one light source is deflected with a deflecting device,
    characterised in that
    - in order to provide the first and the second light distribution (36, 38), the radiation emitted by the respective at least one light source is deflected with the deflecting device of the first headlamp (12) and with the deflecting device of the second headlamp (14) along a predetermined path in the form of lines, in the form of columns and/or in the form of a grid, wherein
    - the radiation is deflected with the deflecting device of the first headlamp (12) along the predetermined path with a time delay with respect to the radiation deflected by the deflecting device of the second headlamp (14).
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DE102014002308.7A DE102014002308B4 (en) 2014-02-19 2014-02-19 Lighting device for a motor vehicle and associated method
PCT/EP2015/000325 WO2015124282A1 (en) 2014-02-19 2015-02-13 Illuminating device for a motor vehicle, and associated method

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DE102014002308B4 (en) 2017-07-20
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EP3108175A1 (en) 2016-12-28
ES2646308T3 (en) 2017-12-13

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