EP3604903A1 - Phares de véhicule automobile à réflecteur ellipsoïde et collimateur - Google Patents

Phares de véhicule automobile à réflecteur ellipsoïde et collimateur Download PDF

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Publication number
EP3604903A1
EP3604903A1 EP18187022.1A EP18187022A EP3604903A1 EP 3604903 A1 EP3604903 A1 EP 3604903A1 EP 18187022 A EP18187022 A EP 18187022A EP 3604903 A1 EP3604903 A1 EP 3604903A1
Authority
EP
European Patent Office
Prior art keywords
light
collimator
motor vehicle
vehicle headlight
reflector
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.)
Withdrawn
Application number
EP18187022.1A
Other languages
German (de)
English (en)
Inventor
Florian Kronberger
Josef Hechenberger
Stephan Arlinghaus
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.)
ZKW Group GmbH
Original Assignee
ZKW Group 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 ZKW Group GmbH filed Critical ZKW Group GmbH
Priority to EP18187022.1A priority Critical patent/EP3604903A1/fr
Priority to US17/265,112 priority patent/US11204145B2/en
Priority to JP2021505764A priority patent/JP6999064B2/ja
Priority to KR1020217004963A priority patent/KR102511409B1/ko
Priority to EP19755297.9A priority patent/EP3830473B1/fr
Priority to PCT/EP2019/070746 priority patent/WO2020025740A1/fr
Priority to CN201980051122.4A priority patent/CN112534182B/zh
Publication of EP3604903A1 publication Critical patent/EP3604903A1/fr
Withdrawn legal-status Critical Current

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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
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • 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
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • 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
    • F21S41/24—Light guides
    • 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
    • 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
    • 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
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • 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
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • 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 headlight.
  • the desire to be able to project a light image onto the roadway is becoming more and more important, the efficiency in the light generation being essential for the quality and the economy of a motor vehicle headlight.
  • various headlights for example main and auxiliary headlights, are used that generate different light images on the road.
  • the term "roadway" is used here for a simplified illustration, because it depends of course on the local conditions whether a photograph is actually on the roadway or extends beyond it.
  • the photograph in the sense used corresponds to a projection onto a vertical surface in accordance with the relevant standards relating to automotive lighting technology.
  • the headlight 10 of a conventional type generates, for example, a light distribution for a partial high beam function.
  • the headlight comprises a light source 11, which is located in a (in Fig. 1 is held and positioned by a circle symbolized) light module 12, a collimator lens 40, an aperture 50 and a projection lens, which here z. B. is designed as a single lens 60.
  • the light coming from the light source 11 is coupled into the collimator optics 40 at a collimator light entry surface 41.
  • the collimator optics e.g. B.
  • the collimator 40 is positioned so that the light source 12 is at the collimator entry focal point; the aperture 50 is arranged with respect to the collimator 40 so that it lies in the collimator exit focal length.
  • a light image is formed in the plane of the aperture 50, and the aperture is set up to hide part of the light image.
  • Downstream of the aperture 50 is a projection lens 60 which is located at a distance from the light image at the location of the aperture 50, this distance being the focal length (more precisely: input focal length) of the projection lens 60 corresponds to.
  • the projection optics 60 are set up to project the light image in the radiation direction of the motor vehicle headlight 10 and thus to produce a light distribution of the desired type on a projection surface (eg street).
  • the light generated by light sources is to be shaped, bundled and projected onto the road as efficiently as possible as a light image.
  • Lenses are often either too expensive or their transmission properties limit them.
  • Undesired chromatic aberration can also occur in certain configurations.
  • Another important problem is the accessibility of the light source to optical components, which is often difficult due to the structure of the light source and its supply components (electrical leads, cooling).
  • the heat development in the light source in particular if it is a laser light source, whereby other components of the headlight, in particular a light-shaping component such as collimator optics, which must be positioned near the light source due to the required geometry of the optics, are damaged by heating can take.
  • the optical element is set up to partially reflect or absorb the light beam, and to partially let it pass.
  • a highly efficient light collection in a motor vehicle headlight can be designed with an ellipsoid reflector, since the reflector surrounds the light source and a very large solid angle is thus available for the focal point or the light collection.
  • This can be advantageously combined in particular with the Lambertian radiation characteristic of a laser light source.
  • the ellipsoid reflector creates a virtual light source, namely in the second focal point, which virtual light source is more geometrically accessible than the actual light source for the optical system connected to the reflector, in particular the projection optics.
  • chromatic aberration is also avoided.
  • the ellipsoid reflector enables a spatial distance between the light source and the collimator optics to be created, thus alleviating the problem of heat development with the (laser) light source, since better heat dissipation is ensured without impairing the optical components.
  • This additional reflector also increases the contrast of the system.
  • Rotationally symmetrical ellipsoid reflectors have two conjugate focal points. The light from one focus passes through the other focus after reflection. Due to the ellipsoidal design, it is possible to use a much larger part of the total emitted light, compared to spherical mirrors or conventional lens systems, which among other things leads to a better light output and an increased brightness value at the maximum of the light distribution. In addition, there is a space-saving geometry that is well suited for the small installation space in a headlight.
  • the motor vehicle headlight according to the invention can be designed for light functions such as, for example, a high beam, a partial high beam, a low beam, but also for additional light functions or the like.
  • the arrangement according to the invention permits efficient bundling of light beams to form a light beam bundle, the light beam bundle being able to be shaped in a simple manner in accordance with predetermined standards and being projected in the direction of radiation of the motor vehicle headlight.
  • the bundling can be adapted particularly well to specific emission characteristics from specific light sources, such as, for example, semiconductor laser diodes.
  • specific light sources such as, for example, semiconductor laser diodes.
  • a specifically adapted and appropriately shaped reflector device with different dimensions or focal points of the ellipsoid can be used for each type of light source used.
  • the collimator does not lie directly on the light source, as is customary in the prior art.
  • the collimator is subjected to less thermal stress and it is thus possible, for example, to use polymethyl methacrylate (PMMA) as the material for the collimator instead of the tarflon (polycarbonate, PC) otherwise customary in the prior art.
  • PMMA is less expensive and absorbs less light because, unlike Tarflon (PC), it can be polished to a high gloss.
  • the arrangement according to the invention makes it possible to use a smaller collimator, as a result of which material can be saved.
  • the projection system fed from the reflector system contains a collimator, an optical element that effectively acts as a diaphragm and a projection optic, for example in the form of a projection lens, the focal planes of the collimator and the projection lens coinciding with the location of the diaphragm of the optical element.
  • This construction enables the light image generated by the collimator in the focal plane to be trimmed in a suitable manner with the aid of the optical element, ie to shade certain areas, in order to then image the trimmed light image with the projection optics.
  • the motor vehicle headlight in particular the optical element, has at least two edges, each of which runs straight and is arranged in the beam path of the light beam in such a way that a light-dark boundary can be generated for a low-beam function of the motor vehicle headlight.
  • This makes it easy to trim the projected light distribution in accordance with relevant standards (e.g. SAE, ECE) for a low beam function.
  • the light source has at least one semiconductor light source, preferably at least one laser diode.
  • a particularly high efficiency of the motor vehicle headlight can be achieved by combining a laser light source with an ellipsoid reflector.
  • the motor vehicle headlight also has a light conversion means which is arranged in the beam path of the light beam and is set up to additionally excite at least one further light beam with a second wavelength range that deviates from the first when excited by the light beam with a first wavelength range.
  • a light conversion means which is arranged in the beam path of the light beam and is set up to additionally excite at least one further light beam with a second wavelength range that deviates from the first when excited by the light beam with a first wavelength range.
  • the ellipsoid reflector is designed as a reflector shell curved in accordance with an ellipsoid of revolution (strictly speaking, a partial shell thereof).
  • the light emitted by the light source can be shaped particularly effectively into a desired light beam.
  • collimator is TIR optics.
  • the collimator is formed by a converging lens with a distance contour, the distance contour defining a plane which is located in front of the collimator light entry surface in the collimator entry focal length. This allows a precise alignment between the collimator and, for example, a holder to which the ellipsoid reflector is attached, to be achieved in a simple manner.
  • the second focal point of the ellipsoid reflector is in the plane of the distance contour, which enables particularly simple attachment with the ellipsoid reflector.
  • the projection optics have at least one converging lens, as a result of which an inexpensive arrangement is created in a simple manner.
  • the optical element is a diaphragm and the diaphragm is set up to reflect or absorb a first part of the light beam on the optical element away from the projection optics and to allow a second part of the light beam to pass the at least one edge to the projection optics.
  • the light beam can be shaped in a simple manner in accordance with the requirements for the desired, projected light image.
  • the optical element is arranged in a substantially vertically oriented manner in a vehicle when the headlight is installed.
  • the optical element is designed such that it contains a reflective component or is a reflector at all, and the component / reflector is set up to deflect a first part of the light beam by means of a reflection on a surface of the optical element to the projection optics , and a second part of the light beam on the at least one edge and on the Let projection optics pass by.
  • This allows the light beam to be shaped in a simple manner in accordance with the requirements for the desired, projected light image.
  • the surface of the optical element is arranged in an installed position of the headlight in a vehicle at an angle of inclination with respect to the horizontal, which is essentially in a range from 10 ° to 50 °, preferably from 20 ° to 40 ° and is particularly preferably 30 °.
  • first image plane intersects with the second image plane in a straight line in which straight line the at least one edge also lies.
  • a headlight contains many other parts, not mentioned, which enable a sensible use in a motor vehicle, such as in particular a car or motorcycle, which are not further elaborated for the sake of clarity.
  • a headlight also contains many other parts, not shown, which enable sensible use in a motor vehicle, such as in particular a car or motorcycle.
  • cooling devices for components, control electronics, further optical elements, mechanical adjustment devices or brackets are not shown, for example.
  • orientations of components mentioned below relate to an installation position of the headlight in a motor vehicle. Of course, other arrangements with different installation positions are also possible.
  • Fig. 2 and Fig. 4 show a first exemplary embodiment of a motor vehicle headlight 100, comprising a light source 110 which is set up to emit light.
  • the light source 110 is held in a light module 120 in a defined, optionally adjustable position.
  • the light distribution that can be generated is particularly suitable for a partial high beam function.
  • an ellipsoid reflector 130 is shown with a reflector light entry point 131, into which the emitted light is coupled, and a reflector light exit opening 132, the contour of which advantageously lies in a plane which, for example, is oriented essentially vertically in the exemplary embodiment shown.
  • the ellipsoid reflector 130 is set up to deflect the light coupled in from the light source 110 in the direction of the reflector light exit opening 132. At the same time, the light is through the second Focus of the reflector 130 is focused, thereby achieving that it is formed into a light beam.
  • the reflector light entry point is advantageously chosen so that it essentially coincides with the first focal point (focal point) of the ellipsoid. If the light source cannot be regarded as point-like, e.g. B. if a flat phosphor of a laser light source is used, it is usually favorable to position a brightest point of the flat light source in the focal point.
  • the light bundled by the second focal point 133 of the ellipsoid reflector 130 exits through the reflector light exit opening 132.
  • the result is a well-defined light beam.
  • the light beam, which leaves the reflector 130 starting from the second focal point 133, has a large divergence, which is why additional optical elements such as. B. a collimator 140 can be used to further focus the light.
  • a collimator 140 is preferably provided, which has a collimator light entry surface 141 and a collimator light exit surface 142, as well as a collimator entry focal length 145 and a collimator exit focal length 146.
  • a collimator entry focal point is at a distance of the collimator entry focal length 145 from the center of the collimator light entry surface 141, and a collimator exit focal point is at a distance from the collimator exit focal length 146 from (the center point) of the collimator Light exit surface 142.
  • a first image plane 170 lies in the collimator exit focal length 146.
  • the collimator 140 can also be set up to focus the light beam incident from the ellipsoid reflector 130 and into it To steer direction of the first image plane 170. With the aid of the collimator, a light image is formed there, that is to say in the first image plane 170.
  • the second focal point of the reflector 130 lies in the collimator entry focal point (entry focal length 145).
  • a projection lens 160 is located at a distance from the light image that corresponds to the focal length (more precisely: input focal length) 161 of the projection lens 160.
  • the associated focal point of the input focal length 161 thus lies in a second image plane 180, which coincides with the first image plane 170 in this exemplary embodiment.
  • the projection optics 160 are set up to project a light image generated by the light beam bundle and located in the second image plane 180 into the radiation direction of the motor vehicle headlight 100.
  • first and second image planes 170, 180 intersect or overlap.
  • An optical element 150 with two optically active edges 151, 152 is arranged in the beam path of the light beam between the collimator 140 and the projection optics 160.
  • the optical element 150 is an aperture.
  • the aperture 150 is described in more detail below.
  • the optical element 150 is set up to limit the light beam with the aid of the at least one optically active edge 151, 152, so that it partially reaches the projection optics 160, i.e. partially reflecting or absorbing, and partially omitting, and the optical element 150 is arranged such that the first and second image planes 170, 180 lie on the optical element 150.
  • the two edges 151 and 152 ( Fig. 2 ) run straight and the edge 151 is oriented essentially horizontally when the motor vehicle headlight is installed in a vehicle, as prescribed by the approval regulations and standards.
  • the edges 151, 152 run at an angle to one another according to the relevant standards (eg SAE or ECE). Depending on the standard, three edges or even more edges may be necessary, for example, in order to produce a desired contour in a projected light image. It can also be useful if the edges are free-formed, that is, they do not run straight.
  • the motor vehicle headlight can have two edges, which each run straight and are arranged in the beam path of the light beam in such a way that a light-dark boundary can be generated for a low-beam function of the motor vehicle headlight.
  • the light source 110 has a semiconductor light source, which is preferably a laser diode.
  • the motor vehicle headlight 100 also has a light conversion means (not shown) which is arranged in the beam path of the light beam and is designed to additionally excite at least one further light beam with a second wavelength range which deviates from the first when excited by the light beam having a first wavelength range ,
  • This light conversion means can be used to convert a non-visible light area into a visible light area, or also for the pure color change of the light beam, for example by adding red and green spectral components by means of corresponding additional light beam bundles to a blue, originally stimulating light beam bundle of a laser light beam, by additive to produce a white beam of light. This aspect is not shown in the figures.
  • the light conversion means can, for example, be arranged directly on the emitting surface of a laser light source or on a surface of an optical lens.
  • the ellipsoid reflector 130 is a reflector in the form of a three-axis curved ellipsoid.
  • the shape of the ellipsoid reflector 130 may differ from the ellipsoid at certain points, for example in order to take into account an adaptation of radiation patterns with special light sources, which can lead to an improvement in the light yield.
  • the collimator 140 is formed by TIR optics (TIR lens).
  • TIR lens TIR optics
  • the luminous efficacy can be increased further, starting from the ellipsoid reflector 130.
  • other configurations of the collimator are possible in design variants and can be useful depending on the application.
  • the collimator 140 is, for example, a converging lens with a distance contour 143, the distance contour 143 defining a plane in which the collimator entrance focal point (entrance focal length 141) is located.
  • the spacing contour 143 is preferably aligned with respect to the reflector light exit opening 132, for example in such a way that its plane coincides with that of the reflector light exit opening 132. This serves z. B. to align the input focal point of the collimator with other parts of the headlamp 100 in a simple manner during assembly of the headlamp 100.
  • the spacing contour 143 can rest on a holder which, for example, carries the ellipsoid reflector 130, as a result of which the two optics 130 and 140 are adjusted relative to one another.
  • the distance contour 143 is preferably arranged annularly and concentrically to the optical axis of the collimator.
  • Other shapes of the spacer contour 143 that are adapted to specific holders are also possible, such as, for example, a three-point support, through which an imaginary spacer contour extends, which defines a plane through which the reflector light exit opening 132 also runs in the assembled state.
  • the projection optics 160 is realized by a converging lens, but can also comprise light-guiding elements, for example.
  • the optical element 150 is a diaphragm, and is designed to reflect or absorb a first part of the light beam on the optical element 150 away from the projection optics 160, and to allow a second part of the light beam to pass the edges 151, 152 to the projection optics 160.
  • the aperture 150 can be designed to be reflective or absorbent.
  • an absorbent coating can be applied to the surface of the screen.
  • further surfaces within the headlight housing of the motor vehicle headlight 100 can also be designed to be absorbent.
  • the diaphragm 150 can also be reflective, for example through a mirrored surface of the diaphragm 150 be directed in order to specifically suppress undesired by single or multiple reflections in the headlight 100 in the direction of the projection optics 160; however, light components can also be redirected so that they contribute to the light image in the illuminated areas, which results in an increase in efficiency.
  • the optical element 150 in the form of the diaphragm is arranged essentially vertically oriented in the vehicle when the headlight is installed.
  • “essentially vertically oriented” means an angular position (of the respective plane or aperture 150) which can deviate from the vertical by up to ⁇ 10 °, preferably up to ⁇ 5 °.
  • the exact angular position is particularly relevant when implementing light functions in which the edges 151, 152 need to be imaged sharply, for example in the case of a low-beam light function with a light-dark boundary.
  • an angular position can be selected, which can deviate from the vertical by up to ⁇ 25 °.
  • the optical element 150 can also comprise a plurality of diaphragms, which are rotatably arranged in the form of an diaphragm shaft, only one diaphragm of the diaphragm shaft being optically active or effective in the beam path of the light beam.
  • the diaphragm shaft can implement a plurality of light functions, for example a low beam or a high beam light function of the headlight 100.
  • a rotatable diaphragm shaft preferably has an axis of rotation which lies in the first or second image plane 170, 180.
  • a light beam 111 is shown, which is emitted by the light source 110.
  • the light source 110 emits further unbundled light beams, for example diffuse light, in an emission pattern specific to the light source.
  • the light beam 111 is coupled into the ellipsoid reflector 130 at the reflector light entry point 131 (in the first focal point) and is reflected on the reflecting surface, passing through the second focal point of the ellipsoid reflector 130 and coupling out again at the reflector light exit opening 132 becomes.
  • the reflector light entry point 131 corresponds to the first focal point into which the point light source 110 (or a location of the light source with the highest intensity as already mentioned) is positioned.
  • the ellipsoid reflector 130 first bundles the individual light beams of the emitted light into a light beam bundle.
  • the collimator 140 bundles the light beam further and focuses it in the first, virtual image plane 170, in which the diaphragm 150 is also located.
  • the light beam is projected by the projection optics 160 from its focal plane, which forms the second, imaginary image plane 180, in the direction of radiation of the headlight 100.
  • the diaphragm 150 and the two edges 151, 152 are arranged in the focal plane of the projection optics 160, the contour, which is formed by the two edges 151, 152, is sharply imaged.
  • Fig. 3 and Fig. 5 show a second exemplary embodiment of a motor vehicle headlight 200 according to the invention, the difference from the first exemplary embodiment primarily being that the optical element 250 contains a component designed as a reflector.
  • the optical element 250 contains a component designed as a reflector.
  • the second embodiment of the Fig. 3 and 5 apply the explanations of the embodiment of the Fig. 2 and 4 Unless otherwise stated in the following, in the same way, corresponding numbers with a leading number 2 (instead of a 1 for the reference numbers of the first exemplary embodiment) are used for reference numbers.
  • the reflector 250 has two edges 251 and 252 ( Fig. 3 ) and is set up to deflect the first part of the light beam by means of a reflection on a surface of the optical element 250 to the projection optics 260, and to allow a second part of the light beam to pass the two edges 251, 252 and the projection optics 160.
  • the reflector 250 can influence the light beam in such a way that it is (only) partially guided to the projection optics 260.
  • the reflector 250 can be embodied, for example, by a mirrored surface of the reflector 250.
  • Those locations in the headlight 200 to which the light rays of the light beam bundle passed by the reflector 250 can advantageously be designed to be absorbent, for example in the form of a separate absorber component 255, in order to target undesired ones by single or multiple reflections in the headlight 200 in the direction of the projection optics 260 to suppress.
  • An additional aperture (not shown) can be arranged on the inner surface of the projection optics 260 on the headlight 200, in order, for example, to suppress unwanted reflections in the direction of the projection axis.
  • a further mirror component could be arranged in place of the absorber component 255 in order to deflect the light beams to a location within the headlight at which absorption takes place.
  • the surface of the optical element 250 in the form of the reflector is arranged at an inclination angle 253 with respect to the horizontal, which is essentially in a range from 10 ° to 50 °, preferably from 20 ° to 40 ° and particularly preferably at 30 °.
  • the first image plane 270 intersects with the second image plane 280 in a straight line in which the edge 251 also lies.
  • the arrangement of the light source 210, the light module 220, the ellipsoid reflector 230 (including the associated reflector light entry point 231 and reflector light exit opening 232 and the second focal point 233) and the collimator 240 in the second exemplary embodiment corresponds to that of the first exemplary embodiment, but these are Components slightly inclined compared to the first exemplary embodiment with respect to the projection optics 260 in order to enable the reflection of the light beam by the projection optics 260 in an installation position which is favorable for a motor vehicle headlight 200.
  • the reflector 250 lies only in one straight line in the focal plane of the projection optics 260, namely in the intersection line of the first and second image planes 270, 280, it can be advantageous if the edge 251 is located in the straight line, thereby reducing the contour caused by edge 251 is formed, is sharply imaged.
  • An arrangement according to the invention according to the second embodiment serves to increase the light yield for other light functions.
  • the reflector 250 can be arranged such that it can rotate, for example in order to implement headlight range control for the motor vehicle headlight 200.
  • the angle of inclination 253 can be controlled or regulated electronically, for example, manually or by a vehicle system.
  • the angle of inclination 253 is preferably rotatable about the straight line which lies in the intersection line of the first and second image planes 270, 280.
  • each of which shows an exemplary light image according to a simulation of a light distribution for a partial high beam.
  • the simulation was computer-aided by the applicant for each of the in the Fig. 6-8 headlight optics shown performed in order to obtain a simulated light image of the respective headlight as a result.
  • Each light image describes the solid angle-related light distribution generated by the respective headlight from the driver's point of view, the right and vertical axes being labeled in degrees according to the deflection from the center of the image.
  • the scale on the right edge of each photograph illustrates the grayscale used in the intensity distribution, given in cd [Candela].
  • isolines of the brightness are drawn in each case, with some isolines additionally giving the assigned brightness value in cd.
  • Fig. 6 shows a light image that for a headlight assembly according to the Fig. 1 was generated, which corresponds to the prior art, that is, with a collimator arranged immediately after the light source.
  • Fig. 7 shows a photograph that for the headlamp according to the invention Fig. 2 and 4 , with the inventive ellipsoid reflector and collimator with a vertical diaphragm.
  • Fig. 8 shows a photograph that for the headlamp according to the invention Fig. 3 and 5 , with an ellipsoidal reflector according to the invention and with a diaphragm component acting as a reflector.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP18187022.1A 2018-08-02 2018-08-02 Phares de véhicule automobile à réflecteur ellipsoïde et collimateur Withdrawn EP3604903A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP18187022.1A EP3604903A1 (fr) 2018-08-02 2018-08-02 Phares de véhicule automobile à réflecteur ellipsoïde et collimateur
US17/265,112 US11204145B2 (en) 2018-08-02 2019-08-01 Motor vehicle headlamp having an ellipsoid reflector and a collimator
JP2021505764A JP6999064B2 (ja) 2018-08-02 2019-08-01 自動車投光装置
KR1020217004963A KR102511409B1 (ko) 2018-08-02 2019-08-01 타원체 반사경 및 시준기를 포함한 자동차 헤드램프
EP19755297.9A EP3830473B1 (fr) 2018-08-02 2019-08-01 Phare de véhicule automobile à réflecteur ellipsoïde et collimateur
PCT/EP2019/070746 WO2020025740A1 (fr) 2018-08-02 2019-08-01 Phare de véhicule automobile pourvu d'un réflecteur ellipsoïdal et d'un collimateur
CN201980051122.4A CN112534182B (zh) 2018-08-02 2019-08-01 具有椭球形反射器和准直仪的机动车大灯

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18187022.1A EP3604903A1 (fr) 2018-08-02 2018-08-02 Phares de véhicule automobile à réflecteur ellipsoïde et collimateur

Publications (1)

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EP3604903A1 true EP3604903A1 (fr) 2020-02-05

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EP18187022.1A Withdrawn EP3604903A1 (fr) 2018-08-02 2018-08-02 Phares de véhicule automobile à réflecteur ellipsoïde et collimateur
EP19755297.9A Active EP3830473B1 (fr) 2018-08-02 2019-08-01 Phare de véhicule automobile à réflecteur ellipsoïde et collimateur

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US (1) US11204145B2 (fr)
EP (2) EP3604903A1 (fr)
JP (1) JP6999064B2 (fr)
KR (1) KR102511409B1 (fr)
CN (1) CN112534182B (fr)
WO (1) WO2020025740A1 (fr)

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FR3123415A1 (fr) * 2021-05-27 2022-12-02 Valeo Vision Module lumineux comprenant un élément absorbant la lumière
EP4170228A1 (fr) * 2021-10-22 2023-04-26 ZKW Group GmbH Dispositif d'éclairage pour phare de véhicule
WO2023169660A1 (fr) * 2022-03-08 2023-09-14 HELLA GmbH & Co. KGaA Dispositif d'éclairage de véhicule

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EP4170228A1 (fr) * 2021-10-22 2023-04-26 ZKW Group GmbH Dispositif d'éclairage pour phare de véhicule
WO2023066756A1 (fr) * 2021-10-22 2023-04-27 Zkw Group Gmbh Dispositif d'éclairage pour un projecteur de véhicule
WO2023169660A1 (fr) * 2022-03-08 2023-09-14 HELLA GmbH & Co. KGaA Dispositif d'éclairage de véhicule

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Publication number Publication date
CN112534182B (zh) 2022-11-01
KR102511409B1 (ko) 2023-03-17
US11204145B2 (en) 2021-12-21
JP6999064B2 (ja) 2022-02-04
JP2021532558A (ja) 2021-11-25
US20210317965A1 (en) 2021-10-14
EP3830473A1 (fr) 2021-06-09
EP3830473B1 (fr) 2023-03-15
WO2020025740A1 (fr) 2020-02-06
CN112534182A (zh) 2021-03-19
KR20210034633A (ko) 2021-03-30

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