EP2523022A1 - Module d'éclairage pour un phare de véhicule automobile destiné à la production d'une distribution lumineuse variable et phare de véhicule automobile doté d'un tel module d'éclairage - Google Patents

Module d'éclairage pour un phare de véhicule automobile destiné à la production d'une distribution lumineuse variable et phare de véhicule automobile doté d'un tel module d'éclairage Download PDF

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Publication number
EP2523022A1
EP2523022A1 EP12157404A EP12157404A EP2523022A1 EP 2523022 A1 EP2523022 A1 EP 2523022A1 EP 12157404 A EP12157404 A EP 12157404A EP 12157404 A EP12157404 A EP 12157404A EP 2523022 A1 EP2523022 A1 EP 2523022A1
Authority
EP
European Patent Office
Prior art keywords
light
projection lens
module
lens
distribution
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
EP12157404A
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German (de)
English (en)
Other versions
EP2523022B1 (fr
Inventor
Matthias Brendle
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
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Filing date
Publication date
Application filed by Automotive Lighting Reutlingen GmbH filed Critical Automotive Lighting Reutlingen GmbH
Publication of EP2523022A1 publication Critical patent/EP2523022A1/fr
Application granted granted Critical
Publication of EP2523022B1 publication Critical patent/EP2523022B1/fr
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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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching 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
    • F21S41/141—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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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-F21S41/28
    • 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
    • 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
    • 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
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/19—Arrangement or contour of the emitted light for regions other than high beam or low beam for curves

Definitions

  • the light distribution generated by the light module can be varied by selectively switching (activating and / or deactivating) light source groups comprising in each case at least one of the light sources.
  • the resulting total light distribution produced by the light module results from a superposition of the light sources of the activated light source groups generated light beams.
  • At least a first light beam generated by the at least one light source of an activated first light source group serves to generate a first partial light distribution below a substantially horizontal light-dark boundary.
  • at least one further light bundle generated by the at least one light source of an activated further light source group serves to produce a further partial light distribution above a substantially horizontal light-dark boundary.
  • the invention also relates to a motor vehicle headlight with such a light module for generating a variable light distribution.
  • An asymmetrical horizontal Patoscuro boundary includes, for example, a first horizontal section arranged on the own traffic side, a second horizontal section arranged on the oncoming traffic side and a transition section between the two horizontal sections.
  • the second horizontal section on the oncoming traffic side is preferably arranged below the first horizontal section on the own traffic side in order to prevent dazzling of oncoming traffic participants.
  • the transition section may be formed stepwise, obliquely or in any other way.
  • An inclined transition section preferably has a 15 ° rise.
  • light modules for vehicle headlights which operate according to the so-called projection principle and which can project different light distributions and different light-dark boundary curves onto the road ahead of the vehicle by switching over.
  • the choice of light distribution occurs, for example, by switching, i. by selective activation or deactivation but also by dimming, individual light sources or light source groups. While such a type of switching and variation of the light distribution was previously reserved for working with the so-called reflection principle light modules with two-filament lamps, there are lately increasingly concepts to work with the projection principle working light modules only by targeted switching of light sources multiple light functions and variable light distributions to create.
  • LED headlamps In contrast to headlamps with gas discharge lamps, LED headlamps not only have a plurality of light sources (LED chips), which can preferably be controlled individually or in groups, but also have a plurality of primary optics associated with the light sources, which can be configured, for example, as projection or reflection optics.
  • the overall light distribution of an LED headlight is generally formed by a superimposition of the partial light distributions of several LED primary optics modules, optionally after passing through a secondary optic, for example in the form of the projection lens.
  • Such multi-function projection headlights are for example from the DE 10 2008 036 192 A1 known. There, the beam path for the respective light functions is divided in a diaphragm plane of the projection module, so that the radiation beams required for the individual light functions can be generated by different, independently switchable light sources. This makes it possible to produce different light distributions without moving diaphragms merely by switching light sources.
  • Corresponding multi-function projection headlights are among others also from the US 2006/0120094 A1 as well as from the DE 10 2007 052 696 A1 known.
  • the division of the beam path can be achieved depending on the physical principle used by means of refraction, reflection or absorption.
  • the high beam and the low beam beam path is formed over a total reflecting surface of a glass body, the edge of which generates the light-dark boundary in the low beam light.
  • the high-beam beams are coupled here in the same glass body, but meet at a steeper angle to said surface so that they are not reflected, but pass through the surface and illuminate a portion of the resulting light distribution above the light-dark boundary (high beam partial beam path).
  • the high beam is then formed by superposition of the low beam beam path with the high beam partial beam path.
  • the mapping of the light-dark boundary on the road surface is problematic.
  • the difficulty is to separate the beam paths of the different light functions so that no light is scattered beyond the light-dark boundary (above the light-dark boundary) in the low beam, ie no crosstalk occurs, and in the high beam case no dark, light or colored line at the location of Low beam Corposcuro border remains.
  • the beam splitters which are used in the known light modules work only inadequately, so that dark areas, in particular dark lines, can be detected in the resulting high beam distribution in the region of the low beam light-dark boundary or the beam splitter edge.
  • the present invention therefore has the object of designing the light module or the motor vehicle headlight of the type mentioned in such a way and further that at the point of the low beam light-dark boundary no colored, light or dark areas (eg lines) can be seen in the high beam distribution or these areas are at least significantly reduced.
  • the light module is configured such that the light beams generated by the first light source group and the further light source group pass through different areas of the projection lens and the projection lens in the areas through which at least one further light bundle generated by the further light source group passes, is designed such that the light-dark boundary of the further partial light distribution is arranged below the light-dark boundary of the first partial light distribution.
  • the at least one first light bundle which is arranged virtually completely below a horizontal light-dark boundary, corresponds, for example, to a dipped-beam light beam.
  • light of low intensity is arranged above the light-dark boundary in the low-beam beam, for example in order to achieve the legally required upper head values and to illuminate traffic signs and information boards at the roadside and above the roadway.
  • the at least one further light bundle corresponds, for example, to the upper part of a high-beam beam (high-beam partial light beam), wherein the at least one first light beam forms a high beam distribution after superposition with the at least one further light beam.
  • the projection lens at least in regions such that it has different imaging properties for the at least one low-beam beam path and the at least one high-beam partial beam path.
  • the high-beam partial beam path is lowered relative to the low-beam beam path in the vertical direction such that the upper part of the high-beam distribution generated by the at least one further light beam is imaged on the low-beam light-dark border and superimposed on it so that it reliably shines over becomes.
  • no colored, light or dark areas, in particular lines and lines can be seen more in the resulting overall high beam distribution.
  • the light module according to the invention comprises a non-rotationally symmetrical converging lens in which a lens region through which the at least one further light beam passes is lowered in the vertical direction in such a way that the further light bundle passing through is displaced downwards so that the low-beam light-dark boundary, ie the light beam Light-dark border, which limits the at least one first light bundle to the top, outshines.
  • the light-dark boundary of the at least one first light bundle and the at least one further light bundle therefore no longer directly adjoin one another in the present invention, but the first and the further light bundles overlap in a range of the light distribution lying between the low-beam light-dark boundary and the high-beam light-dark boundary.
  • the at least one further light bundle pass through edge regions, preferably through lateral edge regions, of the projection lens and the first light bundle, through a center region of the projection lens.
  • the lens vertices are the points of contact of the respectively largest vertical circle inscribed in the respective vertical section on the lens contour. Areas in the lens center are preferably not lowered.
  • the lens vertex of the projection lens contour is lowered in at least one vertical section through edge regions of the projection lens relative to the lens vertex of at least one meridional section through the center region of the lens in the vertical direction.
  • the further light bundles which pass through the edge regions of the projection lens and which preferably illuminate a subarea of the high beam distribution lying above the low-beam light-dark boundary are lowered downward, so that they cover the low-beam light-dark boundary of the first light beam.
  • the at least one further light beam (eg in the form of the high-beam partial beam path), which is sent through the lowered lens edge regions is, relative to the at least one first light beam (eg in the form of the low-beam light path), which passes through the lens in the non-lowered central portions of the lens, are lowered in the vertical direction.
  • the edge regions with the lowered vertexes of the projection lens are arranged laterally to the right and left of the meridional section through the functional lens.
  • the edge regions are preferably lowered symmetrically to the center of the lens relative to the meridional section of the projection lens. It is particularly preferred that the lowering of the lens edge region or of the lens edge regions takes place continuously from the center of the lens to the edge of the lens or to the lens edges.
  • the at least one further light bundle (for example the high-beam partial beam path) runs through the lens central regions around the optical axis of the light module and the at least one first light bundle (for example the low-beam optical path) through lens edge regions.
  • the apexes of the collecting lens contour are vertically lowered instead of in the lens edge areas in the central areas of the projection lens.
  • the vertices in the lens edge regions are preferably not lowered.
  • the latter In at least one sectional plane perpendicular to a main optical axis of the projection lens, the latter has an egg-shaped sectional contour, so that the projection lens has a shape tapering from bottom to top.
  • the projection lens are preferably associated with means for color correction.
  • the refractive power in lens areas above and / or below the optical axis can be selectively changed, preferably increased.
  • Such projection lenses with color correction are in itself from the DE 35 07 013 A1 as well as from the DE 10 2008 021 520 A1 known. As a result, color fringes in the resulting total light distribution can be avoided, or at least reduced.
  • the projection lens is preferably designed as a plano-convex lens.
  • Other embodiments of the projection lens in particular as a biconvex lens, are conceivable.
  • the projection lens may be made of inorganic or organic glasses.
  • Organic glasses are, for example, polycarbonate (PC), polymethyl methacrylate (PMMA), cycloolefin polymer (COP), cycloolefin copolymer (COC), polymethacrylmethylimide (PMMI) or polysulfone (PSU).
  • the light module according to the invention can be used particularly preferably in a motor vehicle headlight.
  • the light module is preferably used in multi-function LED headlamps, e.g. as dipped beam high beam bifunctional light or dipped beam high beam bifunctional base light.
  • FIG. 1 an embodiment of a motor vehicle headlamp according to the invention is shown.
  • the headlamp is designated in its entirety by the reference numeral 1.
  • the headlight 1 comprises a housing 2, which preferably consists of plastic.
  • the headlight housing 2 has a light exit opening 4, which is closed by a transparent cover 5, to prevent the ingress of dust, dirt and / or moisture into the interior of the housing 2.
  • the cover 5 is made of glass or plastic.
  • the cover 5 is formed without optically effective profiles as a so-called clear disc.
  • a light module 6 is arranged, which is designed to generate a variable light distribution.
  • the light module 6 can be fixedly arranged in the housing 2 or can be mounted pivotably in the housing 2 about a vertical axis of rotation 7 and / or a horizontal axis of rotation 8.
  • the light module 6 is preferably designed as a so-called projection module in which a secondary optics, for example in the form of a projection lens, projects an edge of an aperture arrangement arranged in the beam path as a light-dark boundary onto the road ahead of the vehicle.
  • the light module 6 can generate light distributions of any headlight functions or parts of these light distributions. For example, it is conceivable that the light module 6 generates a low beam, a high beam, a fog light, a base or base light, a spot light or any other light distribution.
  • the total light distribution produced by the illumination device 1 consists of a superimposition of the light distributions emitted by at least two of the light modules 6, 9, 10.
  • the total light distribution produced by the illumination device 1 consists of a superimposition of the light distributions emitted by at least two of the light modules 6, 9, 10.
  • Light module 6 generates a base or base light distribution of a low beam, this could generate together with a spotlight light distribution of another light module 9 or 10 by superposition a the legal requirements corresponding low beam distribution.
  • a number of almost arbitrarily be usedstalteteter lighting modules can be arranged, of which in FIG. 1 two exemplary drawn and designated by the reference numerals 11 and 12 are.
  • the light modules 11, 12 are used, for example, to generate a position or limiting light, a daytime running light, a flashing light or any other lighting function.
  • the Figures 2 . 4 and 6 show a well-known from the prior art LED projection module with different marked beam paths, and the Figures 3 . 5 and 7 show the light distributions generated by the respectively marked beam paths on a measuring screen.
  • This in FIG. 2 shown known light module is designated in its entirety by the reference numeral 30.
  • the light module 30 may, for example, instead of the light module 6 in the motor vehicle headlight 1 off FIG. 1 be incorporated, which would then become known from the prior art headlights.
  • the light module 30 has a plurality of light sources 31 in the form of semiconductor light sources, in particular in the form of light-emitting diodes (LEDs), for emitting light.
  • LEDs light-emitting diodes
  • the light sources 31 may in particular comprise one or more LED chips.
  • the LED chips have not just one but a plurality of light-emitting surfaces, preferably separately controllable.
  • the LED chips or the light emitting Surfaces of the LED chips emit light of different colors and different wavelengths.
  • the LEDs 31 are at least indirectly attached to heat sinks 36 and communicate with them in terms of heat technology.
  • the heat sinks 36 serve to dissipate the heat generated during the operation of the LEDs 31 and to deliver the heat to the environment.
  • each of the light sources 31 is associated with a separate heat sink 36.
  • the heat sink 36 are formed as a single heat sink component.
  • the primary optics 32 are designed as attachment optics made of a transparent material, preferably glass or plastic.
  • the attachment optics 32 each comprise at least one entrance surface for coupling in the light emitted by the LEDs 31, interfaces for total reflection of at least part of the coupled-in light and at least one exit surface for decoupling at least part of the coupled-in light, optionally after reflection at the interfaces.
  • the attachment optics 32 focus the passing light by total reflection at the interfaces and / or refraction at the entrance exit surfaces.
  • each of the LED light sources 31 is assigned a separate attachment optics 32.
  • the light module 30 further has a diaphragm arrangement 33 arranged in the beam path for shading at least part of the light emitted by the LEDs 31 and of the LEDs Primary optics of 32 bundled light.
  • the diaphragm assembly 33 lies in a horizontal plane, which preferably comprises an optical axis of the light module 30.
  • the diaphragm arrangement 33 comprises a front edge 34 which serves to generate a light-dark boundary of the light distribution generated by the light module 30.
  • the diaphragm assembly 33 is preferably formed on its upper side and on its underside at least partially mirrored, so that on the top or the bottom of the diaphragm assembly 33 incident light is largely reflected.
  • the light module 30 also includes a secondary optical system 35 arranged in the further beam path, which is designed as a projection lens in the illustrated embodiment, for projecting the light which has passed the diaphragm arrangement 33 as light distribution onto the road ahead of the motor vehicle.
  • the front edge 34 of the diaphragm assembly 33 preferably passes through a focal point of the projection lens 35 or in the vicinity of the focal point 35 of the projection lens 35th
  • At least one of the light sources 31 is arranged together with the primary optics 32 associated therewith above the horizontal plane in which the diaphragm arrangement 33 extends.
  • at least one of the LEDs 31 is arranged with the primary optics 32 associated with it below the horizontal plane.
  • an LED 31 with its associated primary optics 32 above and two LEDs 31 are arranged with the primary optics 32 associated with them below the horizontal plane.
  • the LEDs 31 and the primary optics 32 assigned to them are designed, aligned and arranged in the light module 30 such that a main emission direction of the primary optics 32 focused light toward the front edge 34 of the shutter assembly 33 is directed.
  • the main radiation directions meet at a common point of intersection or an intersection cloud in the horizontal plane of the diaphragm assembly 33 at or near the leading edge 34 of the diaphragm assembly 33
  • FIG. 2 a first beam path 37 is shown, which is formed by the arranged above the horizontal plane LED 31 and the associated projection optics 32.
  • FIG. 3 a measuring screen 38 arranged at a distance from the light module 30 or the vehicle headlight 1 is shown.
  • a horizontal axis HH and a vertical axis VV are shown, which intersect at a point HV.
  • a first light distribution generated by the first beam path 37 is indicated and designated in its entirety by the reference numeral 39.
  • the light distribution 39 has an upper horizontal light-dark boundary 40, which runs just below the horizontal axis HH. Areas of the same or similar illuminance are represented by so-called isolux lines 39 ', the illuminance at the outer edge of the light distribution 39 being lower than in the center.
  • the light distribution 39 is, for example, a low-beam light distribution, in particular a basic or fundamental light distribution of a low-beam light distribution, which together with a spotlight light distribution forms a low-beam asymmetrical light-dark distribution which is common in the European Union.
  • FIG. 4 is a known light module 30 from FIG. 2 shown corresponding light module, but here another beam path is shown.
  • a further beam path 41 which is formed by the light emitted by the LEDs 31 arranged below the horizontal plane and bundled by their associated primary optics 32.
  • the known light module 30 is in the Figures 2 and 4 clearly recognize that both the first beam path 37 and the further beam path 41 virtually distributed over the entire cross-sectional area of the projection lens 35 pass through it.
  • the projection lens 35 has a symmetrical in cross section to the optical axis of the light module 30 construction.
  • the light distribution formed by the further beam path 41 on the measuring screen 38 is in FIG. 5 located and designated in its entirety by the reference numeral 42.
  • the light distribution 42 is bounded below by a horizontal light-dark boundary 43, which runs just below the horizontal axis HH.
  • the light distribution 42 may be referred to as a high beam partial light distribution.
  • the light-dark boundaries 40, 43 of the light distributions 39 and 42 are generated by a projection of the front edge 34 of the diaphragm assembly 33 through the projection lens 35 from the light beams 37 and 41, respectively.
  • FIG. 6 is the well-known from the prior art light module 30 of Figures 2 and 4 shown with two marked beam paths 37, 41.
  • both the LEDs 31 are activated above the horizontal plane and the LEDs 31 below the horizontal plane.
  • the total light distribution resulting from a superposition of the beam paths 37, 41 on the measuring screen 38 is in FIG. 7 shown and designated their entirety by the reference numeral 44.
  • the two individual light distributions 39, 42 border in the area of their Bright-dark boundaries 40, 43 directly to each other and thus form the total light distribution 44 of the light module 30.
  • the total light distribution 44 may be referred to as a high beam distribution.
  • the resulting light distribution 39, 42, 44 by activating or deactivating individual LEDs 31 or LED groups, each comprising at least one of the LEDs 31 are varied.
  • the total light distribution 44 results from a superimposition of the light bundles 37, 41 generated by the activated LEDs 31 or the activated LED groups.
  • the Figures 2 . 4 and 6 thus, the structure of a known low-beam high-beam Bifunktions projection module 30 with three LED light sources 31 and also many TIR (Total Internal Reflection) -Primäroptiken 32.
  • the low-beam light path 37 is on both sides mirrored diaphragm assembly 33 in the focal plane of the projection lens 35 limited so that the light-dark boundary 40 is formed.
  • the high-beam beam path 37 and 41 is formed as a cumulative light distribution 44 by the low beam beam path 37 and the high beam partial beam path 41.
  • the problem with the known light module 30 is that in the resulting total light distribution 44 in the region of the light-dark boundaries 40, 43 of the individual light distributions 39, 42, shadows and / or stripes form which cause a disturbing inhomogeneity of the resulting light distribution 44. These inhomogeneities in the resulting total light distribution 44 can be prevented with the present invention, or at least significantly reduced.
  • an inventive light module is designated in its entirety by the reference numeral 20.
  • the light module 20 largely corresponds to the known light module 30 from the basic construction. It differs from the known light module 30 in particular in that the projection lens 21 is designed in a special way.
  • a horizontal axis 45 (see. FIGS. 11 to 15 ) of the light module 30 extends in the main propagation direction of the light. The axis 45 may pass through the thickest portion of the lens 21.
  • the projection lens 21 has a center region 22 extending around the axis 45 of the light module 20.
  • a first beam path 23 is shown, which is generated by the arranged above the horizontal plane LED 31 and the primary optics 32 associated therewith.
  • the first beam path 23 serves to generate a first light distribution on a measuring screen.
  • the first light distribution is, for example, a low beam distribution or a basic or base low beam light distribution according to the light distribution 39 FIG. 3 .
  • the LED 31 arranged above the horizontal plane and the primary optics 32 associated therewith are arranged, aligned and designed in the light module 20 such that the beam path 23 predominantly, preferably completely, passes through the projection lens 21 in the center region 22.
  • FIG. 9 is the light module 20 of the invention FIG. 8 drawn with a further beam path 24.
  • the further beam path 24 is generated by the LEDs 31 arranged below the horizontal plane and the primary optics 32 assigned to them.
  • the further beam path 24 serves to generate a further light distribution on a measuring screen.
  • the further light distribution is, for example, a high-beam partial distribution, however, with slight deviations from the light distribution 42 FIG. 5 , in particular with regard to the position of the lower bright-dark boundary 43 '(cf. FIG. 10 ).
  • the LEDs 31 arranged below the horizontal plane and the primary optics 32 assigned to them are arranged, aligned and / or configured in the light module 20 such that the further beam path 24 largely, preferably completely, passes through edge regions 25 of the projection lens 21.
  • the center region 22 and the edge regions 25 of the projection lens 21 are preferably formed as separate, mutually separate regions and do not overlap. However, slight overlaps of the edges of the regions 22, 25 are conceivable without affecting the present invention and the advantages associated therewith. It is crucial that the light beams 23, 24 generated by the various LEDs 31 pass through clearly defined areas of the projection lens 21, the areas having at most slight overlaps.
  • the projection lens 21 thus has at most few and in terms of area with respect to the total passage area of the lens 21 small areas through which light from both light bundles 23, 24 passes. At most, a very small proportion of the light beams 23, 24 pass through these common areas.
  • the particular configuration of the projection lens 21 with the different regions 22, 25 through which different beam paths 23, 24 generated by different light sources 31 of the light module 20 can pass allows the projection lens 21 in the different regions 22, 25 with respect to their refractive properties to specifically change and optimize such that dark shadows or light stripes or a color fringe in the resulting total light distribution of the light module 20 (corresponding to the light distribution 44 FIG. 7 ) can be significantly reduced and possibly even completely avoided.
  • the in FIG. 8 drawn first beam path 23 corresponds to a low-beam light path and on a measuring screen 38 in about one of the light distribution 39 from FIG. 3 generates corresponding light distribution.
  • the further beam path 24 correspond to a high-beam partial beam path and on a measuring screen 38 a in FIG. 10 produce light distribution shown 42 '.
  • those regions 25 of the projection lens 21 through which the at least one further light bundle 24 generated by the light sources 31 below the horizontal plane passes are formed such that the Light-dark boundary 43 'of the at least one further light beam 24 below the light-dark boundary 40 of the at least one first light beam 23 is arranged.
  • the entire further light distribution 42 is lowered by the variation of the lens 21 in the areas 25, so that the lowered further light distribution 42 'with the downwardly shifted light-dark boundary 43' results.
  • the low-beam beam path 23 and the high beam partial beam path 24 are thus imaged by different lens areas 22, 25 in the present invention.
  • the low-beam light beam 23 is imaged through the center region 22 of the lens 21 and the high-beam partial beam path 24 through the edge regions 25 on both sides of a meridional section through the projection lens 21.
  • the Abblertztstrahlengang 23 is imaged through the edge regions 25 of the projection lens 21 and the high-beam partial beam path 24 through the center region 22.
  • the center region 22 of the projection lens 21 would have to be formed such that the in FIG.
  • FIG. 11 shows a longitudinal section through the light module 20 according to the invention along the axis 45 of the Module 20.
  • the sectional view off FIG. 11 includes, inter alia, a meridional section through the center of the projection lens 21, ie along the axis 45.
  • a rearward lens vertex is designated by the reference numeral 26 and a front lens vertex by the reference numeral 27.
  • the two lens vertices 26, 27 form contact points of the largest inscribed circle 28 in the illustrated lens cross-section. In the exemplary embodiment illustrated, the vertices 26, 27 lie on the axis 45 of the light module 20.
  • FIG. 12 By way of example, a plurality of vertical sections, each designated by the reference numeral 29, are drawn through the projection lens 21.
  • a vertical section through the lens center forms the meridional section 29 '.
  • the regions of the lens 21 with lowered lens cross-sections 29 are designated by the reference numeral 21 'and lie in the illustrated embodiment in the edge regions 25 of the projection lens 21.
  • the vertices 26, 27 formed unchanged and not lowered.
  • the front lens crests 27 of the lens cross sections 29 lie on a solid line drawn by the reference numeral 27 'designated virtual line. Accordingly, the rear lens vertices 26 lie on a dashed line and designated by the reference numeral 26 'virtual line. It can be clearly seen that the virtual lines 26 'and 27' and thus also the vertices 26, 27 are lowered towards the edge regions 25. Of course, it would also be conceivable to lower only the front vertices 27 or only the rear vertices 26 of the projection lens 21.
  • FIGS. 13 to 15 show various views of the projection lens 21 of the light module 20 according to the invention according to a preferred embodiment.
  • FIG. 13 shows a side view of the projection lens 21
  • FIG. 14 shows a vertical section along the line AA FIG. 13 perpendicular to the axis 45 of the light module 20 through the lens 21, and
  • FIG. 15 shows the projection lens 21 with the vertical section in a perspective view.
  • the FIGS. 14 and 15 is clearly the hatched drawn, egg-shaped, tapering upwards sectional contour of the projection lens 21 recognizable.
  • the projection lens 21 of the light module 20 according to the invention has a relation to the axis 45 symmetrical projection lenses 35 of conventional light modules 30 has a lower overall height.
  • the projection lenses 21 according to the invention are stylistically and structurally advantageous due to their lower height.
  • the invention is described with reference to a combination of low beam and high beam.
  • the present invention can also be used for any other combinations of different light functions (eg dipped beam, cornering light, fog light, daytime running light, high beam, etc.).
  • the shutter assembly 33 extends in a horizontal plane and has a leading edge 34 which the projection lens 21 as the light-dark boundary 40, 43 'of the light distribution 39, 42', 44 on the roadway, cut preferably Hauptabstrahlraumen of the light sources 31 and - if present - generated by the primary optics 32 light beams 23, 24, the horizontal plane or in the vicinity of the front edge 34 of the diaphragm arrangement 33.
  • the light sources 31 are preferably designed as semiconductor light sources, in particular as light emitting diodes.
EP12157404.0A 2011-05-09 2012-02-29 Module d'éclairage pour un phare de véhicule automobile destiné à la production d'une distribution lumineuse variable et phare de véhicule automobile doté d'un tel module d'éclairage Active EP2523022B1 (fr)

Applications Claiming Priority (1)

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DE102011075510A DE102011075510A1 (de) 2011-05-09 2011-05-09 Lichtmodul für einen Kraftfahrzeugscheinwerfer zur Erzeugung einer variablen Lichtverteilung und Kraftfahrzeugscheinwerfer mit einem solchen Lichtmodul

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EP2523022A1 true EP2523022A1 (fr) 2012-11-14
EP2523022B1 EP2523022B1 (fr) 2016-04-20

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EP3179158A4 (fr) * 2014-08-07 2018-03-21 Koito Manufacturing Co., Ltd. Phare de véhicule
FR3062457A1 (fr) * 2017-02-01 2018-08-03 Valeo Vision Module d'eclairage d'un faisceau lumineux pour projecteur de vehicule automobile
EP3412958A1 (fr) * 2017-06-07 2018-12-12 Valeo Iluminacion Module d'éclairage pour un phare automobile
EP3502553A1 (fr) * 2017-12-21 2019-06-26 Valeo Vision Dispositif d'éclairage de véhicule automobile
CN111750328A (zh) * 2019-03-29 2020-10-09 汽车照明罗伊特林根有限公司 用于机动车前照灯的具有并排布置成一排的n个子光模块的光模块
WO2021151766A1 (fr) * 2020-01-30 2021-08-05 HELLA GmbH & Co. KGaA Dispositif d'éclairage pour véhicules
WO2022016144A1 (fr) * 2020-07-17 2022-01-20 J.W. Speaker Corporation Phare bifonctionnel pour véhicule

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FR3062457A1 (fr) * 2017-02-01 2018-08-03 Valeo Vision Module d'eclairage d'un faisceau lumineux pour projecteur de vehicule automobile
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CN102777844A (zh) 2012-11-14
DE102011075510A1 (de) 2012-11-15
EP2523022B1 (fr) 2016-04-20
CN102777844B (zh) 2017-04-12

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