EP3368820A1 - Beleuchtungsvorrichtung, insbesondere für ein kraftfahrzeug - Google Patents
Beleuchtungsvorrichtung, insbesondere für ein kraftfahrzeugInfo
- Publication number
- EP3368820A1 EP3368820A1 EP16782049.7A EP16782049A EP3368820A1 EP 3368820 A1 EP3368820 A1 EP 3368820A1 EP 16782049 A EP16782049 A EP 16782049A EP 3368820 A1 EP3368820 A1 EP 3368820A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- lighting device
- distribution
- light distribution
- spatial phase
- 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
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
- F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
- F21S41/64—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
- F21S41/645—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices by electro-optic means, e.g. liquid crystal or electrochromic devices
-
- 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
- F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
- F21S41/125—Coloured light
-
- 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
-
- 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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/20—Illuminance distribution within the emitted light
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2106/00—Interior vehicle lighting devices
-
- 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
- Lighting device in particular for a motor vehicle
- the invention relates to a lighting device, in particular for a motor vehicle.
- Scanning lighting devices have the disadvantage that very high luminances are needed to meet the requirements of a headlight illumination when used in motor vehicles.
- the increase in the spatial resolution of the scanner is possible only when increasing the luminance of the corresponding light source. High luminances lead to high requirements with regard to eye safety when using the scanning lighting device in motor vehicles.
- the object of the invention is to provide a lighting device with which efficiently freely shapable light distributions can be generated.
- the lighting device is preferably provided for a motor vehicle, such as a car or a truck.
- the lighting device comprises one or more light sources.
- these light sources are monochromatic and / or coherent.
- the light source or light sources comprise one or more laser light sources, whereby larger gradients or higher resolutions can be achieved. Nonetheless, the light source or light sources may also include one or more LEDs.
- the illumination device further comprises an optical device, which is configured such that a first light distribution in an intermediate image plane is generated from one or more light bundles whose light originates from respective light sources, and that from the first light distribution a second light distribution is generated in front of the lighting device. This second light distribution is the target distribution to be generated by the lighting device.
- This light distribution is in particular the light distribution in the so-called optical far field, whose distance from the illumination device is substantially greater than corresponding focal lengths of the optical device.
- the lighting device according to the invention is characterized in that the optical device comprises one or more spatial (i.e., spatially addressable) phase modulators on each of which at least one light beam falls and which are electrically controllable to variably set a phase modulation of the at least one light beam falling thereon.
- the spatial phase modulator (s) are controlled in such a way that only one phase modulation of the light beam or bundles is carried out and substantially all of the light flux is contained on the respective phase modulator after passing the at least one light beam in the first light distribution.
- the lighting device according to the invention comprises a control unit with which the activation of the phase modulator (s) described above is achieved.
- the luminous flux which is present at the phase modulator is retained in the first light distribution after the corresponding light bundle has passed the phase modulator.
- the term of passing here and below includes both a reflection on the phase modulator and a transmission through the phase modulator.
- the illumination device has the advantage that, regardless of the shape of the target light distribution, light losses due to the use of spatial phase modulators are avoided.
- no scanning movement of a light beam is performed to generate the variable light distribution, so that significantly higher light intensities in the target light distribution can be achieved with significantly lower luminances of the light source or light sources.
- the variable generation of various Light distributions are ensured by the electrical control of the phase modulator or modulators.
- the optical device incorporated therein comprises exit optics, in particular in the form of one or more lenses, which images the first light distribution into the second light distribution.
- the illumination device is configured such that each light source is associated with a collimator lens, which generates from the light of the respective light source a collimated light beam of substantially parallel beams.
- phase modulators for generating the phase-modulated light distribution can be used.
- LCoS-SLMs Liquid Crystal on Silicon
- SLM Spatial Light Modulator
- special LCoS SLMs from Hamamatsu are used. Suitable such LCoS SLMs can be found at http://www.hamamatsu.com/us/en/product/application/1512/1574/1558/4015/index.html. Nonetheless, it is also possible to use phase modulators transmitting spatial phase modulators.
- the intermediate image plane whose image is imaged in the target light distribution is a real or a virtual intermediate image plane.
- the illumination device comprises a single spatial phase modulator and a single monochromatic light source, wherein in the real intermediate image plane, a conversion element is arranged which the monochromatic light beam of each light source in a different color spectrum (ie without the wavelength of the monochromatic light beam) and / or converted to white light.
- a conversion element a conversion element known per se can be used. ment be used.
- a phosphorus conversion element made of nitride-phosphorus or oxide-nitride-phosphorus or cerium-doped YAG-phosphorus can be used to generate white light.
- a single spatial phase modulator and a plurality of light sources of different color location are provided, wherein the spatial phase modulator is controlled in operation of the illumination device such that in the intermediate image plane a light distribution with a predetermined color spectrum, in particular a white light distribution, as the first light distribution without Using a conversion element is generated.
- a light distribution with a predetermined color spectrum is achieved by a suitable superposition of different light sources without a conversion element.
- three monochromatic light sources with red, green and blue emission wavelengths are used.
- the light distribution with the predetermined color spectrum preferably contains regions of different color temperature.
- the lighting device in turn comprises a single spatial phase modulator and a plurality of light sources of different color location, wherein the spatial phase modulator is controlled in the operation of the lighting device such that in the intermediate image plane light with spatially varying color distribution is generated, which in particular in the interior of a motor vehicle is emitted.
- the lighting device preferably comprises an interior lighting and / or a head-up display and / or one or more display elements in the motor vehicle interior.
- the light sources of different color loci are cyclically cyclically controlled during operation of the lighting device in such a way that the light sources of different color locations are switched on one after the other in one cycle and remain switched off otherwise. Since the phase modulation of the phase modulator is wavelength-dependent, the phase modulator is always suitably tuned to the wavelength of the currently switched-on light source and can represent color effects by a suitable choice of the differently colored light distributions. In the special case of the motor vehicle headlight These color effects are limited to the prescribed white range for motor vehicle headlights.
- the illumination device comprises a plurality of light sources of different color loci, wherein each light source of a color locus is assigned a separate spatial phase modulator onto which the bundle of the associated light source falls, and wherein the separate spatial phase modulators are controlled in such a way during operation of the illumination device by all separate spatial phase modulators, a corresponding additive first light distribution with a predetermined color spectrum, in particular a white light distribution, is generated without the use of a conversion element.
- the lighting device comprises a headlight of a motor vehicle.
- a headlight is characterized by the fact that it actively illuminates the surroundings of the motor vehicle.
- the lighting device according to the invention may also include a signal light of a motor vehicle, which is characterized in that it only serves to signal for other road users.
- the lighting device may include an apron light and / or an interior light.
- the illumination device is embodied as a headlight of a motor vehicle such that a low beam distribution and / or a high beam distribution in front of the motor vehicle is generated during operation as a target light distribution.
- the invention relates to a motor vehicle, which comprises one or more of the lighting devices according to the invention.
- FIG. 1 is a schematic representation of a first embodiment of a lighting device according to the invention.
- Fig. 2 is a schematic representation of a second embodiment of a lighting device according to the invention.
- Fig. 1 shows a first embodiment of such a headlamp, which is generally designated by reference numeral 1.
- the headlamp comprises a monochromatic laser light source 2, which generates, for example, red, green or blue light.
- the laser light source comprises a laser diode for this purpose.
- monochromatic light is generated, which is converted via a collimator lens 3 in a collimated light beam, which is indicated in Fig. 1 by parallel dashed wavefronts L.
- a spatial phase modulator 4 is used according to the invention, which is designed as a transmitting phase modulator in the embodiment of FIG.
- This phase modulator is electrically controllable.
- the collimated light beam is incident on the phase modulator and by means of a control unit (not shown), only the phase of this light beam is modulated by the phase modulator.
- Corresponding phase modulators are known to the person skilled in the art. By only the phase is changed by the phase modulator, no light losses due to absorption.
- a first light distribution LV1 is generated from phase-modulated light in the real intermediate image plane Z.
- the phase-modulated wavefront is indicated by dashed lines L '.
- the control of the phase modulator is carried out such that in the light distribution LV1 substantially the entire luminous flux of the laser light beam is contained immediately after passing through the phase modulator. As a result, a high light output is achieved.
- the light distribution LV1 generated in the intermediate image plane Z is converted by means of exit optics in the form of a lens 5 into a target light distribution LV2 on the road in front of the spotlight.
- a conversion element which is arranged in the intermediate image plane Z.
- This conversion element converts the monochromatic laser light into white light.
- three monochromatic laser light sources can be used, which generate red, green and blue light and are cyclically switched on and off sequentially in time.
- Wavelength-dependent control of the phase modulator generates monochromatic light distributions in the intermediate image plane from the light bundles of the monochromatic light sources. These monochromatic light distributions are superimposed to form a whitish distribution. In this variant, it is possible to dispense with the use of a conversion element.
- a plurality of separate phase modulators are used which respectively receive the light beam of an associated monochromatic light source.
- the phase-modulated light beams generated by the individual phase modulators are then superimposed to form a common white light distribution.
- Fig. 2 shows a second embodiment of a headlight according to the invention.
- the same components are denoted by the same reference numerals as in Fig. 1.
- a transmitting phase modulator a reflecting phase modulator is used.
- phase modulators are known per se.
- one of the initially mentioned phase modulators from Hamamatsu is used.
- a collimated light beam which has been generated via the collimator lens 3 is incident on the reflecting phase modulator 4.
- the light of the light beam in turn comes from a single monochromatic light source 2.
- phase modulation wherein the phase-modulated light is indicated by dashed L 'occurs.
- intermediate image plane Z analogous to FIG. 1, a conversion element is arranged. net that generates white light from the monochromatic light, which is imaged via the imaging lens 5 in the target light distribution LV2 on the road.
- the luminance of the light source by a factor of 5000 compared to a scanning system can be reduced because no scanning movement is performed
- the use of an electrically controllable phase modulator allows the light field of a light source to be modified in a freely programmable manner, whereby the phase modulator fulfills the function of a freely programmable free-form lens which can be electrically adjusted to any desired light distribution
- a largely lossless Phasenmodulat achieved so that the lighting device works very efficiently.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015221240.8A DE102015221240A1 (de) | 2015-10-30 | 2015-10-30 | Beleuchtungsvorrichtung, insbesondere für ein Kraftfahrzeug |
| PCT/EP2016/074703 WO2017071971A1 (de) | 2015-10-30 | 2016-10-14 | Beleuchtungsvorrichtung, insbesondere für ein kraftfahrzeug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3368820A1 true EP3368820A1 (de) | 2018-09-05 |
| EP3368820B1 EP3368820B1 (de) | 2024-09-25 |
Family
ID=57138061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16782049.7A Active EP3368820B1 (de) | 2015-10-30 | 2016-10-14 | Beleuchtungsvorrichtung für ein kraftfahrzeug |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20180245762A1 (de) |
| EP (1) | EP3368820B1 (de) |
| CN (1) | CN107850280A (de) |
| DE (1) | DE102015221240A1 (de) |
| WO (1) | WO2017071971A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6987350B2 (ja) * | 2017-03-28 | 2021-12-22 | マクセル株式会社 | 車載用前照灯および光の投射方法 |
| DE102017207350B4 (de) * | 2017-05-02 | 2019-05-09 | Volkswagen Aktiengesellschaft | Scheinwerfersystem für ein Kraftfahrzeug |
| CN109539170B (zh) * | 2017-08-11 | 2025-01-17 | 深圳市绎立锐光科技开发有限公司 | 照明装置、汽车大灯及照明系统 |
| JP6959852B2 (ja) * | 2017-12-21 | 2021-11-05 | スタンレー電気株式会社 | 照明装置 |
| DE102018203246A1 (de) * | 2018-03-05 | 2019-09-05 | Osram Gmbh | Beleuchtungsvorrichtung mit wellenlängenkonverter und verfahren zum erzeugen von nutzlicht durch wellenlängenkonversion |
| CN116125738B (zh) * | 2021-12-13 | 2023-11-28 | 华为技术有限公司 | 投影装置、车灯及交通工具 |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6536928B1 (en) * | 2000-03-03 | 2003-03-25 | Lear Corporation | Multi-colored vehicle interior lighting |
| DE102006043402B4 (de) * | 2006-09-15 | 2019-05-09 | Osram Gmbh | Beleuchtungseinheit mit einem optischen Element |
| JP2013522862A (ja) * | 2010-02-10 | 2013-06-13 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 照明装置 |
| DE102011085378A1 (de) * | 2011-10-28 | 2013-05-02 | Bayerische Motoren Werke Aktiengesellschaft | Beleuchtungseinrichtung für ein Kraftfahrzeug |
| US20130190971A1 (en) * | 2012-01-19 | 2013-07-25 | Noel Wayne Anderson | Multifunction light transceiver device |
| US20130194644A1 (en) * | 2012-01-30 | 2013-08-01 | Light Blue Optics Ltd | Image display systems |
| GB2499579B (en) * | 2012-02-07 | 2014-11-26 | Two Trees Photonics Ltd | Lighting device |
| DE102012205437A1 (de) | 2012-04-03 | 2013-10-10 | Bayerische Motoren Werke Aktiengesellschaft | Beleuchtungsvorrichtung für ein Kraftfahrzeug |
| GB2501112B (en) * | 2012-04-12 | 2014-04-16 | Two Trees Photonics Ltd | Phase retrieval |
| TW201504087A (zh) * | 2013-07-23 | 2015-02-01 | Hon Hai Prec Ind Co Ltd | 車前燈燈具模組 |
| WO2015072039A1 (ja) * | 2013-11-18 | 2015-05-21 | 日立マクセル株式会社 | 固体光源装置とこれを用いた車両用灯具、映像表示装置、及び固体光源装置の駆動方法 |
| US9328887B2 (en) * | 2014-03-06 | 2016-05-03 | Darwin Hu | Enhanced illumination efficacy of white color from green laser and magenta phosphor |
| DE102014205450A1 (de) * | 2014-03-24 | 2015-09-24 | Osram Gmbh | Lichtquellenanordnung |
| JP5858185B2 (ja) * | 2014-06-13 | 2016-02-10 | ウシオ電機株式会社 | 光投射装置および車載用前照灯 |
| FR3027654B1 (fr) * | 2014-10-24 | 2019-08-02 | Valeo Vision | Systeme d'eclairage et/ou de signalisation comprenant des moyens de telemetrie |
| DE102016107011A1 (de) * | 2016-04-15 | 2017-10-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Optische Anordnung für einen Scheinwerfer und Scheinwerfer mit der optischen Anordnung |
-
2015
- 2015-10-30 DE DE102015221240.8A patent/DE102015221240A1/de active Pending
-
2016
- 2016-10-14 EP EP16782049.7A patent/EP3368820B1/de active Active
- 2016-10-14 WO PCT/EP2016/074703 patent/WO2017071971A1/de not_active Ceased
- 2016-10-14 CN CN201680042216.1A patent/CN107850280A/zh active Pending
-
2018
- 2018-04-27 US US15/965,301 patent/US20180245762A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE102015221240A1 (de) | 2017-05-04 |
| CN107850280A (zh) | 2018-03-27 |
| EP3368820B1 (de) | 2024-09-25 |
| WO2017071971A1 (de) | 2017-05-04 |
| US20180245762A1 (en) | 2018-08-30 |
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