EP3108175A1 - Beleuchtungsvorrichtung für ein kraftfahrzeug sowie dazugehöriges verfahren - Google Patents
Beleuchtungsvorrichtung für ein kraftfahrzeug sowie dazugehöriges verfahrenInfo
- Publication number
- EP3108175A1 EP3108175A1 EP15704961.0A EP15704961A EP3108175A1 EP 3108175 A1 EP3108175 A1 EP 3108175A1 EP 15704961 A EP15704961 A EP 15704961A EP 3108175 A1 EP3108175 A1 EP 3108175A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- headlight
- radiation
- deflection
- light source
- light
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 8
- 238000009826 distribution Methods 0.000 claims abstract description 48
- 230000005855 radiation Effects 0.000 claims abstract description 39
- 238000005286 illumination Methods 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 235000019557 luminance Nutrition 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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 with 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. 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.
- headlamps 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.
- headlights are known from the prior art, which use a laser as the light source.
- a laser 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.
- 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.
- DE 10 2008 022 795 A1 describes a headlamp for a motor vehicle, which has at least one semiconductor laser as the light source.
- the headlamp includes a light modulator which changes the radiation characteristic of the light emitted by the semiconductor laser light in a predetermined manner. In this way, different light distributions can be provided with the headlight.
- DE 10 2009 048 619 A1 describes a method for controlling a driving light of a vehicle with at least one headlight and at least one sensor for detecting objects. In the event of a collision hazard, 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.
- DE 10 2011 121 603 A1 discloses a headlamp arrangement for a vehicle having a right headlamp unit which comprises at least one light source and optical devices for generating a first partial light emission, which at a front light-dark boundary of a low beam distribution a first side area illuminates in front of the vehicle and at the front light-dark boundary of the low-beam light distribution does not substantially illuminate a second side area in front of the vehicle, and a left headlight unit comprising at least one light source and optical means for generating a second partial light emission at the front Hell Dark boundary of the low-beam light distribution illuminates the second side area in front of the vehicle and does not substantially illuminate the first side area at the front light-dark border of the low-beam light distribution.
- DE 10 2010 028 949 A1 discloses a headlight module with at least one phosphor.
- 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 frame rate must be used for flicker-free imaging.
- Position of the light distribution can be provided. This applies in particular to the high beam distribution.
- the scan speed must be provided by each headlamp for its given area. It is an object of the present invention to operate a lighting device for a motor vehicle safer and more efficient.
- 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 designed such that completely overlay the first opening area and 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 headlight and the second light distribution The second headlamp has been chosen so that the area that is usually illuminated 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.
- each of the headlights includes multiple light sources.
- the deflection device can be designed, for example, as a mirror, in particular as an icmirror.
- the deflection can be designed as an acousto-optical deflector.
- the deflection devices are designed or arranged such that the predetermined area can be completely illuminated with each headlight.
- the deflecting device of the first headlamp and the deflecting device of the second headlamp deflect the radiation emitted by the respective at least one light source along a predetermined path in a cell-shaped, column-shaped and / or grid-shaped manner in order to provide the first and the second light distribution.
- 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 can 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.
- 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 having a first opening area by means of the first headlight and providing the second headlight with a second light distribution with a second opening area with the second spotlight, 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 area.
- 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 distributed in a cell-shaped, column-shaped and / or ras-shaped manner with the deflection device of the first headlight and with the deflection device of the second headlight along a predetermined path. deflected terförmig, 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 is a schematic representation of a motor vehicle, in which the
- Figure 2 is a schematic representation of the illuminated with the headlamps of Figure 1 surfaces with respect to a road.
- Fig. 3 is a schematic representation of a motor vehicle, in which the
- FIG. 1 shows the front area of a motor vehicle 10 in a greatly simplified representation.
- the motor vehicle 10 comprises a first headlight 12 and a second headlight 14
- Light distribution 16 is provided and with 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 region 20 can be used with the first headlight 12 and, in principle, a second light distribution 18 can be provided in the second opening region 22 with the second headlight 14.
- 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 that converts the radiation emitted by the light source and having a first wavelength into radiation having at least one 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, 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 a similar representation to Fig. 1 is 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 th 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 so 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 headlamp 12 for illuminating the surface 46
- the arrow 50 illustrates a light beam of the second headlight 14 is illuminated to illuminate the surface 46.
- the headlights 12, 14 are formed in the manner of a laser scanner. 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.
- the refresh rate for each of the headlamps 12, 14 can 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. 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.
- 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 several light sources per headlight 12, 14.
- a low-beam light is provided by the headlights 2, 14, specific pixels can be controlled in a time-shifted manner by illumination of the transducer element, so that illuminance levels are superimposed on a surface, in particular an area 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 activation, the complete pixel groups can overlap to a predetermined light intensity. Thus, the effective refresh rate can be increased.
Landscapes
- 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014002308.7A DE102014002308B4 (de) | 2014-02-19 | 2014-02-19 | Beleuchtungsvorrichtung für ein Kraftfahrzeug sowie dazugehöriges Verfahren |
PCT/EP2015/000325 WO2015124282A1 (de) | 2014-02-19 | 2015-02-13 | Beleuchtungsvorrichtung für ein kraftfahrzeug sowie dazugehöriges verfahren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3108175A1 true EP3108175A1 (de) | 2016-12-28 |
EP3108175B1 EP3108175B1 (de) | 2017-10-11 |
Family
ID=52477769
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15704961.0A Active EP3108175B1 (de) | 2014-02-19 | 2015-02-13 | Beleuchtungsvorrichtung für ein kraftfahrzeug sowie dazugehöriges verfahren |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3108175B1 (de) |
DE (1) | DE102014002308B4 (de) |
ES (1) | ES2646308T3 (de) |
WO (1) | WO2015124282A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016001915B4 (de) * | 2016-02-18 | 2023-10-05 | Audi Ag | Beleuchtungsvorrichtung für ein Fahrzeug, System mit der Beleuchtungsvorrichtung und Verfahren zum Betreiben einer Beleuchtungsvorrichtung |
DE102017115974A1 (de) * | 2017-07-17 | 2019-01-17 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Beleuchtungseinrichtung und Verfahren zur Projektion eines Symbols auf einer Fahrbahn |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4881255B2 (ja) * | 2007-08-13 | 2012-02-22 | 株式会社小糸製作所 | 車両用前照灯 |
DE102008022795B4 (de) | 2008-05-08 | 2020-01-09 | Osram Opto Semiconductors Gmbh | Kfz-Scheinwerfer |
DE102008030365A1 (de) * | 2008-06-26 | 2009-08-20 | Continental Automotive Gmbh | Einrichtung zur Ansteuerung von in einem Array angeordneten Einzellichtquellen |
JP5233627B2 (ja) * | 2008-12-05 | 2013-07-10 | トヨタ自動車株式会社 | 車両用照明装置 |
DE102009048619A1 (de) * | 2009-10-06 | 2010-06-17 | Daimler Ag | Verfahren zur Steuerung eines Fahrlichts eines Fahrzeugs |
JP5577138B2 (ja) * | 2010-04-08 | 2014-08-20 | スタンレー電気株式会社 | 車両用前照灯 |
FR2959181B1 (fr) * | 2010-04-27 | 2012-05-25 | Valeo Vision | Procede et dispositif de commande d'une pluralite d'ensembles de led d'un vehicule automobile |
DE102010028949A1 (de) * | 2010-05-12 | 2011-11-17 | Osram Gesellschaft mit beschränkter Haftung | Scheinwerfermodul |
JP5719697B2 (ja) * | 2011-06-10 | 2015-05-20 | 株式会社小糸製作所 | 車両の前照灯装置 |
DE102011121603A1 (de) * | 2011-12-17 | 2013-06-20 | Volkswagen Aktiengesellschaft | Scheinwerferanordnung für ein Fahrzeug und Verfahren zum Herstellen einer Scheinwerferanordnung in einem Fahrzeug |
-
2014
- 2014-02-19 DE DE102014002308.7A patent/DE102014002308B4/de not_active Expired - Fee Related
-
2015
- 2015-02-13 EP EP15704961.0A patent/EP3108175B1/de active Active
- 2015-02-13 ES ES15704961.0T patent/ES2646308T3/es active Active
- 2015-02-13 WO PCT/EP2015/000325 patent/WO2015124282A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
DE102014002308A1 (de) | 2015-08-20 |
WO2015124282A1 (de) | 2015-08-27 |
DE102014002308B4 (de) | 2017-07-20 |
EP3108175B1 (de) | 2017-10-11 |
ES2646308T3 (es) | 2017-12-13 |
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