EP2578929A2 - Agencement d'éléments de rétroprojection sur une lentille de projection d'un phare de véhicule automobile - Google Patents

Agencement d'éléments de rétroprojection sur une lentille de projection d'un phare de véhicule automobile Download PDF

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Publication number
EP2578929A2
EP2578929A2 EP12187226.1A EP12187226A EP2578929A2 EP 2578929 A2 EP2578929 A2 EP 2578929A2 EP 12187226 A EP12187226 A EP 12187226A EP 2578929 A2 EP2578929 A2 EP 2578929A2
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EP
European Patent Office
Prior art keywords
overhead
light
elements
headlamp
interface
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
EP12187226.1A
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German (de)
English (en)
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EP2578929A3 (fr
EP2578929B1 (fr
Inventor
Markus Kiesel
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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Publication of EP2578929A2 publication Critical patent/EP2578929A2/fr
Publication of EP2578929A3 publication Critical patent/EP2578929A3/fr
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Publication of EP2578929B1 publication Critical patent/EP2578929B1/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
    • F21S41/20—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
    • 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
    • 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
    • F21W2102/18—Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs

Definitions

  • the present invention relates to a method according to the preamble of claim 1 and a headlamp according to the independent device claim.
  • Such a method and such a headlight are from the DE 10 2009 020 593 A1 known.
  • This document shows in particular a motor vehicle projection headlamp which is adapted to project an edge which limits a luminous flux of a light source of the headlamp as a cut-off of a light distribution generated by the headlamp in the apron, and a projection lens with geometrical overhead Having elements that are implemented as local deformations of an interface of the projection lens and that are adapted to light in a light-dark-border overhead range to direct the light distribution.
  • a motor vehicle projection headlamp which is adapted to project an edge which limits a luminous flux of a light source of the headlamp as a cut-off of a light distribution generated by the headlamp in the apron
  • a projection lens with geometrical overhead Having elements that are implemented as local deformations of an interface of the projection lens and that are adapted to light in a light-dark-border overhead range to direct the light distribution.
  • the cut-off of a low-beam distribution delimits a lower, brightly illuminated area of the light distribution from an upper, darker area.
  • the upper area is known to be less illuminated in order to reduce the glare of other road users, especially oncoming traffic.
  • spot-dependent illuminance levels are required for motor vehicle headlamps. These are formulated separately for dipped and main beam on the basis of numerous measuring points.
  • the present invention relates to the measurement points prescribed for a low beam.
  • a representation of measuring points for the illuminances can be found for example in the Automotive Handbook, 24th Edition, April 2002, ISBN 3-528-13876-9, page 816.
  • This region of the light distribution above the cut-off line is also referred to as an overhead or signlight area (derived from the visibility of the traffic signs).
  • the legal measuring points in this area extend up to 4 ° above the horizon and are transmitted through Minimum or by maximum values and so-called sum values for each set in the measuring points illuminance.
  • Dipped-beam projection systems have very little light above the cut-off line due to the system, because this overhead range is effectively shaded by the aperture used in projection systems. It is this aperture whose edge is projected as a light-dark boundary in the light distribution in front of the headlight, so in particular in front of the vehicle.
  • a local deformation of the lower lens region of the projection lens with an additional, horizontally scattering superstructure is from the utility model DE 20 2005 004 080 known.
  • geometrical surface modifications which, however, are not primarily directed to the illumination of overhead measurement points: these include, for example, lenses with horizontally and obliquely running wave structures. This is known both for the European ECE Legislative Area and for the American SAE Legislative Area. As an example, on the DE 40 31 352 A1 directed. Lenses with cylindrical elements are described in Utility Model G 90 00 395.
  • openings in the Abblettingtblende can also be partially combined with additional, reflective components.
  • An opening in the aperture is, for example, in the KR 10 2009 0064 724 A and in the KR 10 2010 0069 471 A described.
  • the appearance of the projection lens in the on state also plays an increasing role, so that solutions in which a sharp, punctual lighting of parts of the lens is not desired.
  • Previous solutions for overhead light also have the disadvantage that they are usually compatible only with a specific projection system. If these solutions are applied to another projection system, the targets for the measured values to be achieved, neutrality with regard to the performance and homogeneity of the light distribution are generally not achieved. The overhead solution does not fit then.
  • the invention proposed here is characterized in that, in a first step, subregions of the boundary surface are defined, which defines overhead elements in a second step arranged in the sub-areas defined in the first step, simulating an overhead illumination resulting from the simulated overhead elements, the simulation of the defined overhead elements being used to determine a number and / or shape of the defined overhead. Iteratively altering elements such that the simulated overhead illumination satisfies predetermined conditions.
  • the invention provides in its method aspects a modular principle which leads step by step to an individually adaptable to each projection system overhead solution.
  • a particularly preferred embodiment is characterized in that the overhead elements are limited to three subregions of the interface, wherein two of the three subregions are symmetrical to one the optical axis of the headlight are arranged and at right angles to the horizon and the optical axis and thus vertically aligned imaginary plane arranged when the headlamp is aligned so that it generates a light distribution with a rule-compliant, at least partially parallel to the horizon bright-dark boundary, and that the third Area in such an orientation in a lower half of the interface is arranged so that it is divided by the vertically oriented imaginary plane into two equal halves.
  • Fig. 1 shows in detail a schematic representation of an embodiment of a headlamp 10 in a longitudinal section.
  • the headlight 10 has a housing 12 with a light exit opening, which is covered by a transparent cover 14.
  • a projection module 16 is arranged in the housing 12.
  • the projection module 16 has a light source 18 and a reflector 20 which reflects at least part of the light emanating from the light source 18 and focuses it into a focal region.
  • the reflector 20 preferably has the shape of an ellipsoid of revolution or a deviating ellipsoid-like free-form.
  • the light source 18 is arranged in a first focal point F 1 of the reflector 20.
  • An aperture arrangement 22 shields at least part of the luminous flux emanating from the reflector 20.
  • the aperture 22 is in the illustration of Fig. 1 arranged in a plane which is perpendicular to an optical axis 24 and through the second focal point F 2 of the reflector 20.
  • the Aperture 22 may also be arranged lying parallel to the optical axis 24 and have a light-reflecting surface.
  • the diaphragm can also in addition to the vertical extent also parallel to the optical axis have a certain extent, so that it is effectively a thick diaphragm. In any case, however, the aperture edge lying in the region of the second focal point F2 or in the region of a second focal plane is projected as a cut-off line into the front of the headlamp 10.
  • the projection is carried out by a projection lens 26.
  • the projection lens 26 is in the illustrated embodiment by means of a collar 28 engaging on a lens holder (not shown) attached to a front edge of the reflector 20.
  • the lens 26 is made of any light-transmissive material, for example. From a temperature-resistant plastic or glass and has at the light source 18 side facing a substantially planar light entrance interface 30 and on its opposite side a convex light exit interface 32. Of course, the interface 30 may also be concave or convex.
  • the light module 16 is used to generate a light distribution with light-dark boundary, preferably a low-beam distribution or a fog light distribution.
  • the cut-off line results as a projection of the edge of the diaphragm arrangement 22 lying in the region of the second focal point F2 of the reflector 20 in the light distribution generated by the light module 6 on the roadway.
  • the direction x is substantially parallel to the direction of the optical axis 24, which corresponds to the main emission direction of the luminous flux and, with the headlamp 10 installed, parallel to the longitudinal axis of the vehicle.
  • the z direction is parallel to the vertical axis of the vehicle and points upwards.
  • the y-direction is correspondingly perpendicular to the plane of the drawing and points into it.
  • the light exit interface 32 has a portion 58 of interface having an array of one to twenty individual overhead elements 34 realized in the form of local deformations of the interface, here in the form of protrusions , Another grouping of such or similar overhead elements is the subject of the Fig. 1 also laterally disposed approximately at the level of the optical axis 24 in a partial region 54 of the interface 32.
  • FIG. 12 shows a cross-section through a single overhead element 34 of the bottom grouping in the subregion 58 according to FIG. 1 , as he is at a in the plane of the drawing Fig. 1 Guided cut results qualitatively.
  • the cross section of the individual overhead element 34 is divided into a first section 42, which lies between the points 38 and 40, and a second section 46, which lies between the points 40 and 44. Under the vertical extent or length of the individual overhead element here is the distance of the points 38 and 44 in the Fig. 2 Understood.
  • the curvature of the first portion 42 corresponds in a preferred embodiment of the curvature of a cylinder jacket.
  • the surface of the individual overhead element 34 belonging to the section 42 corresponds to a part of a lateral surface of an imaginary cylinder, the axis of which is parallel to the base surface of the vehicle within the lens 26 in the case of a vehicle-mounted headlight 10.
  • the contour of section 42 may also be a spline function or a comparable mathematical one Function or as a combination of such functions. Preference is given to a continuously differentiable course of the edge curve resulting in the section when the curvature is variable in the z direction.
  • the first portion 42 produces the desired deflection effect.
  • the section 46 merely serves to realize a continuously differentiable and therefore edgeless transition between the first section 42 of the individual overhead element 34 and the remaining interface 32 of the lens 26.
  • Individual overhead elements 34 are grouped by juxtaposition and / or superimposing into groups in subregions 54, 56, 58 of the interface. Each such grouping can itself be considered as an overhead element because of its spatial limitations.
  • the desired deflecting effect is evidenced by the comparison of the light beam 48 passing through the interface of the lens 26 in the region of the overhead element 34 with the light beams 50, 52 passing through areas of the interface 32 adjacent to the overhead element 34 , In comparison to the light bundles 50 and 52, a part 48 'of the light bundle 48 undergoes a deflection in the z-direction when passing through the boundary surface 32.
  • the light beam 48 ' is deflected beyond the cut-off line while the part 48 "of the light beam 48 is deflected into the low-beam light distribution
  • the light beams 50, 52 illuminate the area below the cut-off line.
  • the division of the areas of the overhead elements 34 and the remaining light exit interface of the lens 26 are preferably less than one percent up to less than five percent of the light passing through the lens 26 is scattered in the overhead region while the remaining more than ninety-five to more than ninety-nine percent serve to illuminate the region below the cut-off line.
  • a maximum deflection of a light beam 48 'deflected by an overhead element 34 with respect to an adjacent light beam 50, 52 that is not deflected by the overhead element 34 is at least five degrees.
  • the invention has been explained using the example of a light exit interface of a projection lens 26.
  • the locally selectively deflecting effect can also be generated by a corresponding configuration of the light entry interface 30 of the lens 26.
  • the deflecting effect may also be realized by a distribution of overhead elements on the light entry interface of the cover pane.
  • subregions are defined on the interface of the projection lens 26 in the first step, which are suitable for the Positioning of overhead elements are suitable. These sections should have the smallest possible dimensions and thus attract attention aesthetically. They should preferably be arranged in the z-direction below and / or in the y-direction outside.
  • an interface of the projection lens 26, for example the light emission interface 32 is computationally decomposed into small segments. These segments are specifically examined for their suitability for the positioning of overhead elements 34. A suitability results in this sense in particular in that such segments illuminate the environment of the cut-off line. At the end of the analysis, exact statements for the ideal positioning of the geometric elements are obtained. Undesirable side effects on the homogeneity of the light distribution or the efficiency of the projection system are prevented by this procedure.
  • Fig. 3 shows a plan view of a light exit interface 32 of a projection lens 26 with a preferred arrangement of sub-areas 54, 56 and 58. It is preferably two symmetrically arranged portions 54 and 56 and a centrally arranged below the lower portion 58 is defined. This arrangement results in an inconspicuous, desired and aesthetically pleasing appearance of the entire lens 26, so that here another degree of design freedom results, or so that the lens 26 can be considered as a design element.
  • the deliberately chosen appearance of the symmetrical arrangement of the subregions 54 and 56 also avoids, in particular, an impression of one defective lens, as it can be awakened, for example, in a running across the lens and contiguous overhead element in the form of a cylinder part volume.
  • the subregions are arranged in such a way that effects on the low-beam distribution that occurs below the cut-off line, where the overhead light is ultimately taken, are minimal.
  • the homogeneity of the light distribution remains largely untouched.
  • subregions 54, 56, 58 are defined on the boundary surface of the projection lens, but they do not necessarily have to be arranged as shown in FIG Fig. 3 is shown. It is essential that the subregions 54, 56, 58 are suitable for an arrangement of overhead elements 34, the suitability resulting from the fact that the subregions 54, 56, 58 have the smallest possible dimensions and that a luminous flux flowing through these subregions Passes 54, 56, 58, can be deflected without disturbing effects on the rest of the light distribution in the above the cut-off line overhead overhead area of the light distribution.
  • the partial areas are those areas on the projection lens 26 that are traversed by light that would serve to generate the cut-off line in the absence of overhead elements 34, So that would contribute to lighting the bright area at or just below the cut-off line.
  • the interface for example the light exit interface 32 of the projection lens 26, is mathematically decomposed into small segments. These segments are then targeted examined for their suitability for the positioning of overhead elements.
  • three partial areas 54, 56, 58 are defined, wherein two partial areas 54, 56 of the three partial areas are arranged symmetrically to an imaginary plane containing the optical axis 24 of the headlight 10 and perpendicular to the horizon and to the optical axis and thus vertically aligned if the headlamp is aligned so that it generates a light distribution with a rule-compliant, at least partially parallel to the horizon lying light-dark boundary. In the Fig. 3 this is the xz plane.
  • the third region 58 is arranged in such an orientation in a lower half of the interface 32 so that it is divided by the vertically oriented imaginary plane 39 into two equal halves, so that in this respect also results in a symmetry of the arrangement with respect to said plane 39 ,
  • the individual overhead elements 34 which are grouped together in such a subarea can also be arranged rotated relative to one another.
  • the deflection is made by such a grouping with both lateral and vertical directional components.
  • the two symmetrical relative to each other with respect to a center between them and parallel to the xz-plane symmetry arranged portions 54, 56 preferably have a width of 4 to 5 mm at a length of about 10 mm.
  • the lower middle area is preferably about 6 mm long and about 2.5 mm high. This applies to a lens 26 with a diameter of about 60 to 75 mm. With these values, the area occupied by overhead elements 34 is only about 3% of the projected into the plane light exit surface 32 of the projection lens 26.
  • this area fraction is less than 5%.
  • the width is preferably between two mm and ten mm, with their length is preferably between one and twenty mm.
  • the two laterally symmetrically arranged sub-regions 54, 56 are arranged so that they are parallel to the optical axis and through the respective sub-area 54 or 56 passing axis of rotation so that they light in the alignment of the headlight described in claim 5 not only up, but also distract to the side.
  • the optical axis runs in the Fig. 3 parallel to the x-direction.
  • the subregions 54 and 56 are preferably so with overhead elements, for example with overhead elements 34 of the in the Fig. 2 shows that these overhead elements deflect light passing through them in such a way that this light has respective propagation direction components 60, 62.
  • propagation direction components are characterized in that they not only have an upward component (in the z-direction), but that they additionally side-directed, ie in the positive and / or negative y-direction have pointing directional components.
  • the width of the overhead illumination in the y-direction which is required for a conformity to the rule, is achieved, so that all the prescribed measuring points are illuminated.
  • each group preferably contains a number of individual overhead elements that is between 1 and 20.
  • the overhead elements 34 preferably have a geometry which allows a defined generation of overhead light due to their far-reaching adaptability. At the same time, targeted light control takes into account the maximum values to be observed (glare values) so that the legal requirements can be met safely.
  • the overhead elements are at least C1-continuous, ie at least once continuously differentiable and thus integrated without step or kink in the interface, ie in the surface of the projection lens 26. In mass production this leads to an improved tool life.
  • the dimensioning of the geometric elements to be used in the partial regions defined in the first step takes place by means of simulation and subsequent analysis. Due to the precisely defined geometry of the overhead elements 34, their effect can be predicted with good accuracy. Thus, a slight adjustment of the elements 34 to be precise Targets possible. This achieves significant time savings in determining the size, number and orientation of the overhead elements.
  • targeted smaller surface portions 42 of the front surface of the projection lens 26 are tilted relative to their previous orientation in the vertical direction.
  • a z-component of a surface normal of the surface portion or surface area is increased.
  • the light, which passes through these surface sections, respectively surface areas, undergoes a significant increase compared to its previous direction, ie an enlargement of the z-component of its propagation direction and then illuminates as a desired consequence the overhead area of the light distribution. This light is taken from the setting without such a tilting Abblertztverander.
  • the vertical deflection angle is varied within the tilted surface portions to cover the entire overhead measurement range. This creates a flat and homogeneous, albeit comparatively weakly lit, area in which all overhead measuring points are located.
  • the maximum light deflection, which is achieved by the overhead elements, is at least 4 °, but can also be up to 10 °.
  • the surface portions 42 tilted against the surface 32 of the projection lens 26 are generally realized by cylinder portions. But they can also be limited by comparable or different mathematical functions or, for example, spline surfaces or a combination of them.
  • the integration of the tilted individual surfaces in the surface of the projection lens is done by skillful rounding, which lie between the points 40 and 44. Different, defined by mathematical functions rounding surfaces or free-form surfaces can be used. Even areas defined by spline functions can be used for this, differently defined areas are also possible.
  • the rounding is realized, in particular, by producing a transition, which can be continuously differentiated at least once, between the base surface 32 of the projection lens 26 and the light-deflecting surface sections, or the overhead elements.
  • This soft integration into the projection lens 26 improves the life of the lens tool because there are no sharp edges that could be worn.
  • the basic appearance and operating principle of the overhead elements is as already described FIG. 2 shown.
  • the arrangement and grouping of the overhead elements is not limited to an arrangement in a pattern of three partial areas. Depending on the lighting design of the projection system, a different positioning, number and size of the above-described overhead elements 34 is suitable for generating a sufficient amount of overhead light, without having to accept a disturbing influence on the remaining light distribution.
  • each of these subareas be it the three subareas 54, 56 or 58 from the Fig. 3 or otherwise arranged or a different number of subregions, at least one individual overhead element 34 is placed.
  • a cast with only a single overhead element 34 a cast of each subarea with only up to ten individual overhead elements 34 is preferred, wherein the number of individual overhead elements in the symmetrically arranged subregions is preferably the same.
  • the two lateral areas with overhead elements can additionally be rotated about their midpoint, the axis of rotation being parallel to the optical axis of the projection system.
  • the rotation angle can be optimally adapted.
  • the passing light is deflected not only upwards, but also targeted laterally. As a result of this measure, the illumination of measuring points (glare values) limited to the upper limit of the permitted illuminance is substantially reduced. At the same time, the overhead overhead measurement points are more illuminated, increasing the efficiency of the overhead elements.
  • the overhead elements Due to the compactness of the overhead elements within their subregions, they can be arranged on the surface of the projection lens in such a way that the required light can be removed without disturbing the remaining light distribution. Areas that have only a slight mixing of the light or for the performance of the projection system are relevant, can be omitted: In this way, for example, inhomogeneities or darkening are prevented in the area directly in front of the vehicle and in the side areas of the light distribution.
  • the group of overhead elements 34 integrated centrally and preferably at the bottom in the subarea 58 of the lens front surface Fig. 3 this is the group of individual overhead elements 34 arranged in the subarea 58. These support the elements 34 arranged laterally in the subareas 54 and 56, thereby making an additional contribution to the required overhead light.
  • the aesthetically improved appearance of the overhead elements due to the lower conspicuousness is achieved by using very compact structures with spatially small dimensions instead of an overhead element that extends far beyond the projection lens or numerous discrete individual elements.
  • a very small height of the individual elements in the direction of their surface normal is achieved.
  • This height is preferably in the range of 0.02 to 0.2 mm.
  • the use of only one element per group may be sufficient, here the division is omitted.
  • This embodiment is preferred when only a correspondingly small area is required for the overhead elements.
  • the grouping of a plurality of similar overhead elements 34 in a delimited subregion, for example an overhead region 54, 56 or 58, and the symmetrical arrangement of the subregions result in a desired appearance, so that the elements are not confused with surface defects on the lens are.
  • the desired appearance is enhanced by the arrangement of the two lateral overhead areas 54, 56, which is symmetrical to the vertical axis, and the centrally located additional area 58, which likewise contains a grouping of individual overhead elements 34.
  • H denotes a horizontal and V a vertical.
  • the H direction corresponds to the y direction used here, and the V direction thus corresponds to the z direction.
  • the numbers are angular degrees.
  • the closed curves are lines of equal illuminance, with the illuminance decreasing from the inside to the outside.
  • the overhead measurement points M1-M6 to be illuminated with a minimum amount of light are certainly located in the sufficiently illuminated overhead area. At the same time, the light level below the measuring points M4, M5, M6 no longer increases, so that the maximum values (glare values) permissible there are reliably maintained.
  • the essence of the present invention relates to the described method for arranging and designing lens structures for generating overhead values.
  • the invention is not limited to the generation of a special overhead light distribution.
  • the method should determine the position, dimensions and number of overhead elements.
  • the light source 18 itself and the reflector 20 and the aperture 22 of the low-beam light distribution must be taken into account.
  • Suitable light sources are halogen and gas discharge lamps and semiconductor light sources in question.
  • Preferred positions of the overhead structures are areas on the lens which are traversed by light which serves to generate the bright-dark boundary.
  • the surface structures of the invention can with the known lens structures (wave structures, scar patterns, diamonds after DE102008023551 ), in particular those for influencing the light-dark boundary are combined.
  • the structures for generating the overhead values are not overlaid with the other structures. Instead, the overhead structures described here are retained and the other structures are cropped accordingly.
  • the lens front surface is computationally divided into small, individual segments of suitable size in a first step.
  • these segments are each 5 x 5 mm in size.
  • a separate simulation is carried out for each segment of the surface of the projection lens.
  • the light which passes through the currently examined segment of the projection lens is considered.
  • the result is the associated light distribution for each segment. This always knows at which point of the light distribution how much light from the relevant segment arrives.
  • each segment in a third step determines whether this segment is suitable for the integration of overhead elements.
  • all lens areas in this third step are divided into areas usable for the overhead lighting and unusable areas.
  • Usable areas are those areas that bring light to or near the cut-off line. Non-usable areas illuminate the apron of the vehicle or illuminate the lateral area of the light distribution or are essential for the efficiency of the projection system. If one were to arrange in this sense unusable areas overhead elements, the homogeneity of the light distribution and the performance of the projection system would be degraded.
  • the height of the area to be illuminated ie the distance from lower edge to upper edge of the overhead light band, is set by the radius of the underlying cylinder. The smaller the radius chosen, the stronger the resulting overhead light is vertically expanded.
  • the optimal vertical positioning of the overhead area is achieved via a vertical displacement of the cylinder axis of the overhead individual elements.
  • the entire light band is precisely adjustable in its vertical position. It can be moved further up or down to optimally illuminate the given measuring points.
  • a vertical displacement is understood to mean a displacement parallel to the vertical axis of the vehicle. In the figures, this is the z-direction.
  • the amount of light required for the overhead light can be easily dimensioned via the variation of the number of individual overheand elements and over the lateral extent of the individual elements.
  • the additional relief of the glare values is achieved by a suitable positioning of the overhead individual elements and additionally by a rotation of the overhead elements.
  • the positioning of the overhead individual elements takes place in such a way that they are arranged only in uncritical regions of the projection lens. These are the appropriate areas mentioned above.
  • the rotation on the surface of the projection lens 32 additionally creates a lateral deflection, while in one orientation a plurality of individual overhead elements 34 in the z-direction one above the other so to speak in a vertical row, a deflection of the light takes place only in the vertical direction.
  • a plurality of such individual overhead elements 34 are preferably arranged in a row next to each other or one above the other.
  • These individual overhead elements are preferably grouped together, as z. B. from the top view of a projection lens 26 according to FIG. 3 is apparent.
  • the grouping in the subregion 58 shows a side-by-side arrangement in which several individual overhead elements 34 are arranged next to one another in the y-direction.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP12187226.1A 2011-10-04 2012-10-04 Agencement d'éléments de rétroprojection sur une lentille de projection d'un phare de véhicule automobile Active EP2578929B1 (fr)

Applications Claiming Priority (1)

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DE102011114636A DE102011114636A1 (de) 2011-10-04 2011-10-04 Anordnung und Dimensionierung von Overhead-Elementen auf einer Projektionslinse eines Kraftfahrzeugscheinwerfers

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EP2578929A2 true EP2578929A2 (fr) 2013-04-10
EP2578929A3 EP2578929A3 (fr) 2015-04-29
EP2578929B1 EP2578929B1 (fr) 2020-05-20

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EP3974709A1 (fr) * 2020-09-25 2022-03-30 ZKW Group GmbH Dispositif d'éclairage pour un phare de véhicule automobile

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WO2021104558A1 (fr) 2019-11-28 2021-06-03 Docter Optics Se Procédé de fabrication d'un élément optique à partir de verre
DE102020115079A1 (de) 2020-06-05 2021-12-09 Docter Optics Se Verfahren zur Herstellung eines optischen Elementes aus Glas
DE102020127639A1 (de) 2020-10-20 2022-04-21 Docter Optics Se Verfahren zur Herstellung eines optischen Elementes aus Glas
US20230348309A1 (en) 2020-10-20 2023-11-02 Docter Optics Se Method for producing an optical element made of glass
US11708289B2 (en) 2020-12-03 2023-07-25 Docter Optics Se Process for the production of an optical element from glass
DE102022101728A1 (de) 2021-02-01 2022-08-04 Docter Optics Se Verfahren zur Herstellung eines optischen Elementes aus Glas
DE102021105560A1 (de) 2021-03-08 2022-09-08 Docter Optics Se Verfahren zur Herstellung eines optischen Elementes aus Glas
DE102022100705A1 (de) 2022-01-13 2023-07-13 Docter Optics Se Kraftfahrzeug
DE102022109270A1 (de) 2022-04-14 2023-10-19 Marelli Automotive Lighting Reutlingen (Germany) GmbH Projektionslichtmodul für einen Kraftfahrzeugscheinwerfer mit einer Overheadelemente aufweisenden Projektionslinse

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US5307247A (en) 1992-09-22 1994-04-26 Autopal, Statni Podnik Headlamp for motor vehicles
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US7040789B2 (en) 2003-04-03 2006-05-09 Valeo Vision Lamp device for a motor vehicle illuminating gantry points
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DE202005004080U1 (de) 2005-03-14 2005-07-07 Zizala Lichtsysteme Gmbh Linse für einen Fahrzeugscheinwerfer
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EP3214364A1 (fr) * 2016-03-02 2017-09-06 Valeo Vision Lentille amelioree pour dispositif d'eclairage de vehicule automobile
FR3048485A1 (fr) * 2016-03-02 2017-09-08 Valeo Vision Lentille amelioree pour dispositif d'eclairage de vehicule automobile
US10190741B2 (en) 2016-03-02 2019-01-29 Valeo Vision Lens for lighting device for motor vehicles
EP3379143A1 (fr) * 2017-03-21 2018-09-26 Valeo Vision Module lumineux avec correction de chromatisme
EP3974709A1 (fr) * 2020-09-25 2022-03-30 ZKW Group GmbH Dispositif d'éclairage pour un phare de véhicule automobile
WO2022063461A1 (fr) * 2020-09-25 2022-03-31 Zkw Group Gmbh Dispositif d'éclairage pour un phare de véhicule automobile

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