EP2917635A1 - Dispositif d'éclairage de véhicule - Google Patents

Dispositif d'éclairage de véhicule

Info

Publication number
EP2917635A1
EP2917635A1 EP13788933.3A EP13788933A EP2917635A1 EP 2917635 A1 EP2917635 A1 EP 2917635A1 EP 13788933 A EP13788933 A EP 13788933A EP 2917635 A1 EP2917635 A1 EP 2917635A1
Authority
EP
European Patent Office
Prior art keywords
light
primary
abstrahloptikeinrichtung
lighting device
abstrahlhemmungsmittel
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
Application number
EP13788933.3A
Other languages
German (de)
English (en)
Other versions
EP2917635B1 (fr
Inventor
Ernst-Olaf Rosenhahn
Doris Boebel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Automotive Lighting Reutlingen Germany GmbH
Original Assignee
Automotive Lighting Reutlingen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Automotive Lighting Reutlingen GmbH filed Critical Automotive Lighting Reutlingen GmbH
Publication of EP2917635A1 publication Critical patent/EP2917635A1/fr
Application granted granted Critical
Publication of EP2917635B1 publication Critical patent/EP2917635B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations
    • 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
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/70—Prevention of harmful light leakage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers

Definitions

  • the invention relates to a motor vehicle lighting device with a laser light source.
  • Laser light sources e.g., semiconductor lasers, laser diodes
  • a small light-emitting surface high radiation intensities, and the emission of largely collimated light bundles.
  • optical systems with smaller focal lengths can therefore be constructed with more concentrated beam progressions than with less collimated light beams of, for example, incandescent lamps or light-emitting diodes (LEDs).
  • LEDs light-emitting diodes
  • lasers generally emit monochromatic light or light in a narrow wavelength range.
  • a motor vehicle headlamp for example, a motor vehicle headlamp but usually white mixed light is desired or required by law.
  • lasers typically emit coherent and highly collimated light. At the typical high radiation intensities of laser light sources, such light is potentially dangerous, especially to the human eye. This is especially true at radiation powers of a few watts, as is desirable in the field of automotive lighting.
  • a use of laser light sources in automotive lighting is therefore only possible if compliance with safety regulations for the operation of laser devices is ensured.
  • safety regulations for the operation of laser devices
  • only a light with an intensity below prescribed limits may escape from a motor vehicle headlight. Glare or danger to road users must be avoided.
  • compliance with the safety requirements must be ensured even if the lighting device is deformed or misaligned, for example, by mechanical action, accident or assembly errors. In any case, the lighting device must comply with the safety regulations for the operation of laser systems.
  • photoluminescence converters or photoluminescent elements For the conversion of monochromatic light into polychromatic or white light, the use of photoluminescence converters or photoluminescent elements is known in the field of white light-emitting diodes (LEDs) or luminescence conversion LEDs. These usually have a photoluminescent on.
  • the light of a commonly colored (e.g., blue) light-emitting LED excites the photoluminescent dye for photoluminescence, whereupon the photoluminescent dye itself emits light of other wavelengths (e.g., yellow). In this way, part of the irradiated light of one wavelength range can be converted into light of another wavelength range. As a rule, a further portion of the incident light is scattered by the photoluminescent element.
  • the scattered light and the light emitted by photoluminescence then become superimposed and lead, e.g. to white mixed light.
  • the mechanism of photoluminescence can be distinguished depending on the lifetime of the excited state in fluorescence (short life) and phosphorescence (long life).
  • the photoluminescent element has safety-relevant significance.
  • One problem is that, as the position of the photoluminescent element changes or as the photoluminescent element is destroyed (e.g., by mechanical action, accident, manufacturing defect, or design error), potentially dangerous, highly collimated laser beams may exit the automotive lighting device.
  • the object of the invention is to enable the use of laser light sources in compliance with safety requirements in motor vehicle lighting devices and to avoid as much as possible a hazard from emerging from the lighting device, highly collimated laser beams.
  • the illumination device comprises a laser light source for emitting a primary light beam in a primary space angle range about a primary radiation direction starting from the laser light source. Furthermore, a photoluminescent element is provided which is arranged such that the primary light beam which can be emitted by the laser light source impinges on the photoluminescent element. In this case, an intermediate optics or a beam guiding means, e.g. a light guide, provided to direct the laser light to the photoluminescent element.
  • the photoluminescent element is also designed in such a way that a secondary light distribution with, in particular, polychromatic or white light can be emitted by the incident primary light beam by utilizing photoluminescence.
  • an (one-part or multi-part design) Abstrahloptik driving is provided, which is designed such that the secondary light distribution in a desired Abstrahllichtver notorious the lighting device is deformable (deflectable and / or reflectable and / or projected).
  • the illumination device also comprises a radiation-inhibiting means, which is designed and arranged such that the transformation into the emission light distribution can be suppressed for those light bundles which extend from the laser light source in the primary-space angle region around the primary emission direction.
  • a light emission distribution can be achieved, which corresponds to the requirements and legal requirements for automotive lighting devices. Possible applications are vehicle headlights and car lights, such as signal lights.
  • vehicle headlights and car lights such as signal lights.
  • the advantages of the laser light source mentioned above can be used, in particular the high luminance, high intensity and high efficiency of the laser system. Such properties may be particularly advantageous for headlights, for example with high beam function.
  • the generally monochromatic laser light is converted via the photoluminescent element into light having the desired properties, in particular in polychromatic or white light.
  • white light is light that complies with legal requirements (for example, ECE or SAE), which are defined for the different light functions.
  • ECE or SAE legal requirements
  • the highly collimated and coherent and thus potentially hazardous laser light is converted into an at least partially diffused, largely incoherent mixed light, which essentially no longer has the risk potential of laser light.
  • the photoluminescent element is in particular designed such that it scatters the primary light beam and that at least a portion of the primary light beam serves to excite photoluminescence in the photoluminescent element.
  • the photoluminescent element may be formed, for example, as glass or ceramic platelets which is coated with or contains a luminescent dye.
  • a luminescent dye e.g. phosphorus-containing luminescent dyes come into consideration.
  • blue laser light (wavelength about 450 nm) is at least partially converted into yellow (in particular incoherent) light by photoluminescence in the photoluminescent element, for example with wavelengths in the range around 570 nm (or, for example, also a broad range between 450 nm and 780 nm) become.
  • the converted light may addively mix with the blue light scattered at the photoluminescent element to form white light.
  • the emission of the secondary light distribution is thus e.g. by partial conversion of the primary light beam via photoluminescence and by partial (in particular diffuse and / or incoherent) scattering of the primary light bundle on the photoluminescent element.
  • the following beam path results in normal operation: starting from the laser light source acting as the primary light source, a primary light bundle (laser light) extends essentially around the primary beam direction in the primary space angle range.
  • the laser light source in addition to the actual light emitting portion (for example, optically active surface of a laser diode) may also comprise a beam shaping means, an intermediate optics and / or a beam guiding means, which direct the primary light beam in the primary space angle range around the primary radiation direction.
  • the laser light source may comprise a laser diode and a primary light guide (e.g., glass fiber), the light emitted by the laser diode being launchable and guided by the primary light guide into the primary space angled region about the primary radiation direction.
  • a primary light guide e.g., glass fiber
  • the primary light beam normally strikes the photoluminescent element. This emits the secondary light distribution by excitation for photoluminescence and / or by scattering.
  • the light beams of the secondary light distribution impinge on the Abstrahloptik adopted and are converted by this in the, usually concentrated around a main emission, Abstrahllichtver Irish the lighting device.
  • the photoluminescent element for the Abstrahloptik acts as the actual light source whose secondary light distribution is no longer substantially the risk potential of laser light.
  • the potentially dangerous laser light in the primary light bundle therefore does not get directly into the emission light distribution.
  • the photoluminescent element thus ensures compliance with the initially described safety requirements in normal operation.
  • the photoluminescent element can be arranged directly on the laser light source. Unlike known white LEDs, however, the photoluminescent element can also be arranged at a distance from the laser light source, since the emitted laser light beams can also be directed to a spaced-apart photoluminescent element due to their narrow focusing and collimation (or by an intermediate optics).
  • the Abstrahloptik baseline can be used as a reflector, e.g. parabolic reflector or as a reflector assembly may be formed. It is also possible that the Abstrahloptik Hughes as a projection device, e.g. comprising a projection lens is formed.
  • the Abstrahloptik Hughes can also consist of several optical elements, e.g. Primary optics and secondary optics.
  • the photoluminescent element is not located in the beam path of the primary light beam due to mechanical influences, accident or design error (e.g., broken or shifted), the laser light of the primary light beam is suppressed by the emission inhibiting means.
  • the emission control means is thus arranged so as to prevent potentially dangerous laser light from entering the emission light distribution.
  • the Abstrahlhemmungsstoff in the beam path behind the photoluminescent element may be located at a location which would irradiate the primary light beam of the laser light source in the absence of the photoluminescent element.
  • the primary beam direction is understood to be a primary beam axis (i.e., an axis defined in space with respect to the laser light source).
  • the laser light source is designed in this sense to emit a primary light beam in the primary space angle element about the primary beam axis.
  • the Abstrahlhemmungsstoff is adapted to the fact that the deformation is suppressible in the Abstrahllichtver notorious for those light bundles, which extend in the primary space angle range around the primary beam axis.
  • each laser beam in a Abstrahlhemmungsmittel inside the lighting device can be terminated. Even in an accident, a danger is therefore avoided by radiated laser beams in an easy-to-implement manner.
  • This protective device has a high level of reliability, since in particular movable mechanical components or complex electronic controls are not absolutely necessary.
  • the abovementioned suppression of the radiation takes place insofar as the deformation is inhibited or weakened or at least substantially prevented or completely prevented for the light bundles extending in the primary space angle region around the primary radiation direction.
  • the emission control means is in particular designed such that the maximum intensity of a light bundle extending in the primary space angle region around the primary radiation direction is reduced to a predetermined fraction, in particular in the range of 0.01% to 30% of the original maximum light intensity.
  • the Abstrahlhemmungsmittel may in particular be designed so matched to the laser light source, that the intensity of a running in the primary space angle range around the Primärärabstrahlraum beam below a predetermined safety value is lowered.
  • the influence of the emission control means on the emission light distribution is low or negligible.
  • the emission inhibiting means is preferably dimensioned in its extent such that the collimated and high-intensity laser light of the primary light beam is suppressed in the case where it impinges directly (without photoluminescent element).
  • the photoluminescent element when the photoluminescent element is effective, the emission light distribution is generated substantially by the secondary light distribution. This is less collimated and more diffuse. The power of the secondary light distribution is therefore distributed more homogeneously in the room. Suppression of light rays in the comparatively small primary space angle range about the primary radiation direction therefore does not lead to a significant power loss or disturbances of the emission light distribution in normal operation.
  • the Abstrahlhemmungsmittel is disposed on the Abstrahloptik driven itself.
  • an arrangement in an entry position of the Abstrahloptik boots is possible.
  • the entry position is the one in which a light bundle (proceeding from the laser light source) in the primary space angle region around the primary emission direction first impinges on the abstraction device.
  • the emission control means may be arranged in an exit position of the Abstrahloptik issued. This exit position is that through which an outgoing from the laser light source in the primary space angle range around the primary radiation direction light beam exits from entering this again after striking or entering the Abstrahloptik issued.
  • a Abstrahlhemmungsstoff be arranged both in the entry position, as well as in the exit position.
  • the Abstrahlhemmungsmittel is preferably arranged in the beam path between the photoluminescent element and the Abstrahloptik issued. This prevents from the outset that potentially hazardous laser light is deflected or transformed by the Abstrahloptik adopted in the direction of the Abstrahllichtver notorious.
  • the emission control means can also be arranged in the beam path only after an entry position of the abstraction device, for example in or after an exit position of the abstraction device. As a result, as a result, the deformation of the light beam influenced by the emission inhibiting means into the emission light distribution is also suppressed.
  • the emission control means is preferably arranged at a distance from the photoluminescent element and from the emission optics device. This can be advantageous because the Abstrahlhemmungsstoff can heat when exposed to high-intensity laser light.
  • the Abstrahlhemmungsmittel is realized as a reflective or absorbing diaphragm.
  • the diaphragm can be designed as a region of the emission optics device provided with a light-absorbing or reflective coating, for example a projection lens or a reflector of the abstraction device.
  • the Abstrahlhemmungsmittel comprises a deflection prism or a facet element, which is designed such that a light beam impinging on the deflection prism or facet element can be deflected such that it does not contribute to the Abstrahllichtver notorious.
  • an embodiment is conceivable such that an incident light beam is deflected into an absorber or a light trap, preferably in the interior of the lighting device.
  • the deflection is preferably carried out in a direction substantially perpendicular to the main emission direction of the illumination device.
  • the emission control means is designed as a light scattering element such that an incident light beam is scattered substantially homogeneously in all directions, so that potentially dangerous laser light beams in the emission light distribution are suppressed.
  • the Abstrahlhemmungsmittel can be realized in a simple manner as a hole in the reflector surface.
  • a light absorber can be arranged behind the hole.
  • the Abstrahloptik driving comprises a projection lens, wherein the Abstrahlhemmungsmittel is designed as a deflection prism, which is integrally formed on a light passage surface of the projection lens.
  • This light passage area may be a light entry surface or a light exit surface of the projection lens.
  • the deflection prism is designed so that a light beam passing through the deflection prism is deflected in such a way that it does not contribute to the emission light distribution (for example, in a direction substantially perpendicular to the main emission direction of the illumination device).
  • the deflection prism may have at least one convexly or concavely curved surface such that a light bundle deflected by the deflection prism (in particular initially collimated) is converted into a diverging light bundle. This reduces the light intensity in the deflected light beam and is advantageous if a laser beam deflected by the deflection prism is to be terminated, for example in an absorber or a light trap, since the power can be distributed over a larger area.
  • a protective screen is provided in the beam path between the laser light source and the Abstrahloptik issued. This can be arranged in the beam path between the laser light source and the photoluminescent element and / or between the photoluminescent element and the Abstrahloptik issued.
  • the protective screen is preferably designed in such a way that such light beams are absorbed or reflected, which extend from the laser light source outside a safety space angle range around the primary radiation direction of the laser light source.
  • the safety space angle range is just equal to the primary space angle range around the primary radiation direction, i. E. in particular, the protective screen is designed in such a way that light bundles are absorbed or reflected which extend around the primary radiation direction outside of the primary space angle range.
  • the protective cover is preferably designed as a pinhole.
  • the protective screen may be arranged at a distance from the laser light source and the photoluminescent element. However, it is also conceivable that the protective screen is arranged adjacent to the photoluminescent element or to the laser light source.
  • the laser light source is preferably designed as a semiconductor laser, in particular as a laser diode. It can be selected laser light sources that emit essentially monochromatic light. For example, a blue laser diode can be used that emits light at wavelengths in the range of 450 nm. Preferably, laser light sources with radiation powers in the range of 0.1 watts to 10 watts, preferably 1 watts to 5 watts are used.
  • the photoluminescent element is no longer in the event of a fault in the beam path of the primary light beam, there is a risk that the laser beam will cause further damage to the lighting devices.
  • parts of the lighting device or the Abstrahlhemmungsstoff can heat up even by the incident laser beam in the event of a major incident, which can lead to fire hazard. Further damage to the lighting device can be avoided by deactivating the laser light source when an accident occurs.
  • a detection device can be provided, by means of which the intensity of laser light in the primary space angle range can be monitored around the primary beam direction. A sharp increase in recorded intensity may indicate an incident. It can then be provided that the laser light source is switched off on the basis of a detector signal of the detection device.
  • the shutdown of the laser light source with regard to road safety can possibly be done with a longer reaction time. It can therefore be used on a simple detection device with possibly simple control electronics.
  • Figure 1 sketched representation of a lighting device in normal operation
  • Figure 2 sketched representation of an embodiment of a lighting device according to the invention in normal operation
  • FIG. 3 shows the lighting device according to FIG. 2 in the event of a fault
  • Figure 4 shows another embodiment of a lighting device according to the invention in case of failure
  • Figure 5 in turn another embodiment of a lighting device according to the invention in case of failure
  • FIG. 7 sketched representation of another embodiment of the invention in case of failure.
  • lighting devices according to the invention are outlined, which can be used for example as a motor vehicle headlights use. Corresponding embodiments are also possible for motor vehicle lights or other automotive lighting devices.
  • FIG. 1 shows a motor vehicle lighting device 10 with a laser light source 12. This emits a primary light beam 14 of laser light, which is collimated and concentrated around a Primärärabstrahlraum 16 in a small primary space angle range.
  • a pinhole shield 18 is arranged following in the beam path on the laser light source 12 . This can be present or omitted in all embodiments.
  • the protective shield 18 serves to suppress laser beams, which run outside a safety-space angle range defined by the diaphragm aperture of the protective shield 18, as directly as possible after being irradiated by the laser light source 12.
  • a photoluminescent element 20 is arranged such that the primary light beam 14 strikes the photoluminescent element 20. This is excited by the laser light of the primary light beam 14 for photoluminescence and optionally scatters a portion of the laser light of the primary light beam diffuse. By the incident primary light beam 14, therefore, the photoluminescent element 20 is caused to emit a secondary light distribution 22, which fills a significantly larger secondary space angle range compared to the primary space angle range.
  • the light of the secondary light distribution 22 is preferably incoherent, polychromatic or white and in particular no longer has the potentially dangerous properties of laser light.
  • An illustrated in the illustrated example as a reflector Abstrahloptik adopted 24 is used to transform the light beams of the secondary light distribution 22 in a Abstrahllichtver gutter 26 (here: deflect), which is substantially concentrated around a Hauptabstrahlraum 28 of the lighting device 10.
  • the photoluminescent element 20 If in the illumination device 10 the photoluminescent element 20 is removed from its illustrated position, for example by mechanical influence, accident or assembly error, the laser light of the primary light beam 14 strikes the radiation device 24 (reflector) along the primary radiation direction 16 and becomes the emission light distribution 26 diverted. In such an accident, therefore, in the illumination device 10 in the Abstrahllichtver Krebs 26 potentially dangerous, high-intensity laser beams would be included.
  • FIG. 3 shows the illumination device 40 in a damaged state, in which the photoluminescent element 20 is no longer arranged in the beam path of the primary light bundle 14.
  • the primary light beam 14 propagates in the primary radiation direction 16 (or in the primary space angle region about the primary radiation direction 16) in the direction of the abstraction device 24. Since the hole 42 is disposed at the position in the reflector surface of the radiation device 24 in which the primary light beam 14 propagating in the primary space angle region around the primary radiation direction 16 impinges on the radiation device 24, deflection of the laser light into the emission light distribution 26 of the illumination device 40 is suppressed.
  • the extent of the hole 42 is at least such that all or most of the light rays propagating around the primary radiation direction 16 from the laser light source 12 pass through the hole 42 and are therefore not deflected by the radiation device 24.
  • FIG. 4 shows an illumination device 50 according to the invention.
  • the illumination device 24 has a reflector surface on which a facet element 52 is provided.
  • the facet element 52 is arranged on the reflector surface of the radiation device 24 in such a way that light bundles propagating around the primary radiation direction 16 in a primary-space angle region meet the facet element 52.
  • the facet element 52 is embodied such that the incident light beams are deflected in a region facing away from the main emission direction 28 of the illumination device 50 and thus do not contribute to the emission light distribution of the illumination device 50.
  • the facet element 52 thus acts as Abstrahlhemmungsstoff 30th
  • FIG. 4 again shows an accident in which a photoluminescent element 20 in the beam path of the primary light bundle 14 is missing.
  • the potentially dangerous laser light beam strikes the facet element 52 starting from the laser light source 12 and is deflected by the latter into an interfering light bundle 54 with a directional component opposite to the main emission direction 28.
  • the lighting device 50 may have an absorber element 56 or another device acting as a light trap.
  • the absorber element 56 is preferably arranged in such a way that the associated stray light bundle 54 strikes the absorber element 56 for all the light beams deflected by the facet element 52.
  • the emission control means 30 is provided by a e.g. absorbing diaphragm 62 formed. This is so arranged and dimensioned in its extent that such light beams are absorbed by the diaphragm 62, which extend from the laser light source 12 in a primary space angle range about the primary radiation direction 16.
  • the aperture 62 is arranged in the beam path between the laser light source 12 and the Abstrahloptik sensible 24, wherein the aperture 62 is spaced from both the Abstrahloptik sexual 24 and the laser light source 12.
  • the diaphragm 62 is arranged on the Abstrahloptik Hughes 24 and there absorbs the unwanted light beam before deflection in the Abstrahllichtver notorious.
  • a photoluminescent element 20 arranged in the beam path of the primary light bundle 14 is again missing.
  • An undesired deflection of laser beams into the emission light distribution is however suppressed by the diaphragm 62.
  • the stop 62 is also arranged so that it is spaced from the photoluminescent element 20 when it is arranged as intended in the beam path of the primary light beam 14.
  • Figures 6 and 7 show embodiments of the invention in which the Abstrahloptik sensible 24 comprises a projection lens or is formed by this.
  • the Abstrahloptik healthy in all embodiments of the invention may also include combinations of projection lens and reflector or of multiple projection lenses and / or multiple reflectors.
  • FIG. 6 shows an illumination device 70 with an abstraction device 24 embodied as a projection lens 74.
  • an abstraction device 24 embodied as a projection lens 74.
  • a primary light beam of laser light 14 strikes the photoluminescence element 20 and causes it to emit a secondary light distribution 22 in the manner described above the projection lens 74 is projected into the emission light distribution 26.
  • the projection lens 74 has, as light passage surfaces, a light entry surface 75a, through which light bundles of the secondary light distribution 22 can enter the projection lens 74, and a light exit surface 75b, through which light bundles can emerge from the projection lens 74.
  • An entry position 76 is defined on the light entry surface 75a as the region in which a light bundle extending from the laser light source 12 in the primary irradiation direction 16 (or a primary space angle range about this primary irradiation direction 16) first impinges on the abstraction means 24 (projection lens 74).
  • the light entrance surface 75a has a diaphragm 72 for absorbing light rays. It is also conceivable that the light entry surface 75a in the entry position 76 has a light scattering element, by means of which potentially dangerous laser light can be converted into harmless scattered light.
  • the diaphragm 72 forms a Abstrahlhemmungsmittel 30 in the context of the invention, since the deformation 72 is suppressed by the aperture 72 in the Abstrahllichtver Minor 26 for such light bundles, which extend in the primary space angle range around the Primärärabstrahlraum 16.
  • the potentially harmful laser light of the primary light beam 14 is absorbed by the diaphragm 72.
  • the projection lens 74 may also have a corresponding diaphragm or a corresponding light scattering element at its light exit surface 75b. This is arranged at the exit position 78, in which light rays emerge from the projection lens 74, which, starting from the laser light source 12 in the primary space angle region around the primary radiation direction 16, have been coupled into the projection lens 74 via the light entry surface 75.
  • the diaphragm or the light scattering element is arranged and dimensioned such that the deformation (projection) is suppressed in the Abstrahllichtver Irish 26 for all those light rays, which due to the starting from the laser light source 12 in the primary space angle range around the primary radiation direction 16 primary light bundle are.
  • a protective shield 80 designed as a perforated diaphragm is provided in the case of the illumination device 70 (conceivable for all embodiments of the invention.
  • the protective shield 80 has a diaphragm opening which is designed such that light bundles are absorbed which extend outside of a safety-space angle range around the primary radiation direction 16. In this way, it is possible to prevent harmful laser beams from reaching the emission light distribution 26 via the projection lens 74 in the event of a maladjustment of the laser light source 12 with respect to the photoluminescent element 20.
  • the abstraction device 24 which in turn is in the form of a projection lens 74, has a deflection prism 92 on its light exit surface 75b.
  • the deflection prism 92 is integrally formed on the projection lens 74.
  • the deflecting prism 92 is designed and dimensioned such that such light bundles extending in the projection lens 74, which are due to light beams extending from the laser beam source 12 in a primary space angle region around the primary radiation direction 16, can be deflected into an interference light distribution 94.
  • this disturbance light distribution 94 propagates substantially perpendicular to the main emission direction 28 of the illumination device 90. Therefore, the disturbance light distribution 94 does not contribute to the emission light distribution.
  • the photoluminescent element 20 is missing in the beam path from the laser light source 12 (eg due to an accident or design error)
  • the laser light of the primary light beam 14 enters the projection lens 74 through the deflecting prism after entering through the light entry surface 75a 92 deflected into the Störlichtver notorious 94 and is therefore not included in the Abstrahllichtver notorious the lighting device 90.
  • the deflecting prism 92 therefore acts as Abstrahlhemmungsstoff in the above sense.
  • the deflecting prism 92 may have a deflection surface and / or a light exit surface with a convex or concave curvature, which is chosen such that the Störlichtver gutter 94 is so divergent that no potentially dangerous light intensities occur for further development.

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

Abstract

L'invention concerne un dispositif d'éclairage de véhicule (40, 50, 60, 70, 90) comprenant une source de lumière laser (12) servant à émettre un faisceau lumineux primaire (14) dans une plage d'angle solide primaire autour d'une direction de rayonnement primaire (16). Le dispositif d'éclairage (40, 50, 60, 70, 90) comprend un élément photoluminescent (20) qui est disposé de telle façon que le faisceau lumineux primaire (14) qui peut être émis au moyen de la source de lumière laser (12) vient frapper l'élément photoluminescent (20) par exemple par le biais d'une optique intermédiaire ou d'un moyen de guidage de faisceau (24, 74) et qui est formé de façon à pouvoir émettre à partir du faisceau lumineux primaire (14) incident une distribution de lumière secondaire (22) en utilisant la photoluminescence. En outre, le dispositif comprend un système optique rayonnant (24, 74) qui est formé de telle façon que la distribution de lumière secondaire (22) peut être transformée en une distribution de lumière rayonnée du dispositif d'éclairage (40, 50, 60, 70, 90). Pour augmenter la sécurité, il est prévu un moyen d'inhibition du rayonnement (30, 42, 52, 62, 72, 92 qui est formé et disposé de telle façon que la transformation en distribution de lumière rayonnée (26) peut être supprimée pour les faisceaux lumineux qui s'étendent à partir de la source de lumière laser (12) dans la plage d'angle solide primaire autour de la direction de rayonnement primaire (16).
EP13788933.3A 2012-11-09 2013-10-31 Dispositif d'éclairage de véhicule Active EP2917635B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012220472.5A DE102012220472A1 (de) 2012-11-09 2012-11-09 Kfz.-Beleuchtungsvorrichtung
PCT/EP2013/072828 WO2014072227A1 (fr) 2012-11-09 2013-10-31 Dispositif d'éclairage de véhicule

Publications (2)

Publication Number Publication Date
EP2917635A1 true EP2917635A1 (fr) 2015-09-16
EP2917635B1 EP2917635B1 (fr) 2020-11-25

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EP13788933.3A Active EP2917635B1 (fr) 2012-11-09 2013-10-31 Dispositif d'éclairage de véhicule

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EP (1) EP2917635B1 (fr)
DE (1) DE102012220472A1 (fr)
WO (1) WO2014072227A1 (fr)

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WO2014072227A1 (fr) 2014-05-15
EP2917635B1 (fr) 2020-11-25
DE102012220472A1 (de) 2014-05-15

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