EP3070395A1 - Module lumineux de projection pour un phare de véhicule automobile - Google Patents

Module lumineux de projection pour un phare de véhicule automobile Download PDF

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Publication number
EP3070395A1
EP3070395A1 EP16158169.9A EP16158169A EP3070395A1 EP 3070395 A1 EP3070395 A1 EP 3070395A1 EP 16158169 A EP16158169 A EP 16158169A EP 3070395 A1 EP3070395 A1 EP 3070395A1
Authority
EP
European Patent Office
Prior art keywords
light
partial
diaphragm
light exit
deflection
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Withdrawn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
EP16158169.9A
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German (de)
English (en)
Inventor
Martin Licht
Christian Buchberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Automotive Lighting Reutlingen Germany GmbH
Original Assignee
Automotive Lighting Reutlingen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Automotive Lighting Reutlingen GmbH filed Critical Automotive Lighting Reutlingen GmbH
Publication of EP3070395A1 publication Critical patent/EP3070395A1/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Withdrawn legal-status Critical Current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
    • F21S41/60—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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F21S41/145—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device the main emission direction of the LED being opposite to the main emission direction 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
    • F21S41/24—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
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • 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
    • F21S41/27—Thick 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • F21S41/333—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas with discontinuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
    • 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
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
    • 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
    • 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
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • 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 projection light module for a motor vehicle headlight according to the preamble of claim 1.
  • Such a projection light module is known from US Pat. No. 7,207,705 B2 known.
  • the known projection light module has a semiconductor light source and a transparent, inherently rigid solid.
  • the transparent solid body has a light entry surface facing the light source, a light exit surface, a specular diaphragm surface delimited by a diaphragm edge, and a first deflection surface.
  • the diaphragm surface is arranged such that it protrudes into a light bundle deflected at the first deflecting surface, so that the diaphragm edge separates a first partial light stream which passes by the diaphragm from a second partial light stream, which strikes the diaphragm surface.
  • the intent optics, the diaphragm and the projection lens are initially individual parts that are held together by the associated support frame and fasteners, which are usually realized as a sheet metal profile, in a fixed position to each other.
  • the individual parts must first be assembled during assembly and thereby adjusted to each other. This justifies an undesirably high workload and, associated with it, correspondingly high assembly costs.
  • these projection light modules require undesirably much space.
  • the side through which the light is coupled into the transparent solid facing the direction of travel, so that a surface normal of the light entrance surface facing in the direction of travel.
  • These Side of the solid body has a concave recess in which the light exit surface of the light emitting diode is arranged.
  • the concave recess is formed as a negative of the convex shape of the light exit surface of the light emitting diode. A refraction reducing the aperture angle of the light beam emanating from the light-emitting diode therefore does not take place during the coupling.
  • Light-emitting diodes are known to be approximately Lambert radiators that radiate light in almost all directions of a half-space, which also by the figures of US Pat. No. 7,207,705 B2 is supported.
  • Their first deflection surface is curved and has two focal points. One focal point is located in the light exit surface of the light emitting diode, and the other focal point is located at the diaphragm edge.
  • the first deflection surface and the reflective aperture surface are covered with a reflective film, which consists for example of aluminum. Looking at the figures of the US Pat. No. 7,207,705 B2 this is evidently necessary in order to prevent undesired coupling at the reflection surfaces, which is known to occur at small angles of incidence between the beam and the solder.
  • a second deflection surface is located on the inside of the solid, which faces the direction of travel.
  • the second deflection of the direction of travel faces so far that their lying in the transparent solid surface normal have a direction parallel to the direction of travel component.
  • the diaphragm surface is arranged so that it directs the second partial light flow directly onto the light exit surface.
  • the solid body has a light-collecting protuberance, which has the light entry surface facing the light source and which has a cross-section increasing with increasing distance from the light entry surface and which is bounded by reflecting side walls.
  • the invention Compared to the above-mentioned, more individual components such as intent optics, aperture and projection lens having conventional projection light modules, the invention has the advantage that tolerances that occur in an assembly of multiple items can be avoided. There are fewer items needed. This makes the module cheaper to produce.
  • the opening angle of the light coupled into the solid light is reduced before striking the first deflection. Ideally, a reduction in the opening angle takes place so far that a bundle of parallel rays results.
  • Such a bundle even if its rays are not completely parallel, always has a certain extent transverse to the direction of propagation of the light. This distinguishes such a bundle, for example, from a focus focused bundle that does not have an extension transverse to the propagation direction at the focal point in an idealized view.
  • the transverse extension of the light bundle leaving the protuberance facilitates a division into a first and a second partial luminous flux, because the dividing diaphragm surface need not be positioned as accurately as in the case of a focal point distribution.
  • the light strikes the first deflection surface at at least similar angles to the perpendicular, so that the reflection conditions dependent on these angles are similar for these rays.
  • individual or multiple protuberances can also be formed in such a way that focusing takes place at the diaphragm edge in order to produce the light distribution desired for a low-beam light.
  • the deflection surfaces can easily be arranged so that the light incident on them is incident there overall with such a large angle to the solder that the reflections are largely due to internal total reflections. Compared with reflections on metallically mirrored boundary layers, advantageously only minor light losses occur. Due to the fact that the diaphragm surface directs the second partial light flow directly onto the light exit surface, light losses which would otherwise occur if further reflections are required are avoided.
  • a preferred embodiment is characterized in that the light exit surface of a first Light exit partial surface and a second light exit partial surface is, through each of which a partial light stream (34, 36) emerges.
  • the first light exit partial surface is disjoint to the second light exit partial surface.
  • the light entry surface has a concave shape.
  • first deflection surface, the diaphragm surface and the second deflection surface are realized as flat surfaces in a vertical section.
  • a further preferred embodiment is characterized in that at least one of the following surfaces: the first deflection surface, the diaphragm surface, and the second deflection surface is a curved surface.
  • first deflection surface, the diaphragm surface and the second deflection surface are each curved so that the two light exit partial surfaces coincide to form a plane or homogeneously curved light exit surface.
  • At least a part of the light exit surface is provided with a microstructure which generates a scattering effect.
  • a further preferred embodiment is characterized in that the transparent solid is an integrally connected block.
  • the transparent solid body consists of several individual parts, which in the production with a transparent adhesive to each other.
  • FIG. 1 a motor vehicle headlight 10 with a housing 12, whose Light exit opening is covered by a transparent cover 14. Inside the housing, a projection light module 16 is arranged.
  • the illustrated arrangement of the headlamp results in its intended use in a vehicle. Location and direction information in this application always refer to such intended use, unless it is expressly pointed to a deviation from this principle.
  • the x-direction indicates here a direction of travel, which coincides when driving straight ahead with the direction of a longitudinal axis of the vehicle.
  • the y direction indicates a direction transverse to the vehicle longitudinal axis and parallel to the horizon
  • the z direction indicates a vertical direction.
  • the projection light module has a semiconductor light source 18 and a transparent, inherently rigid solid 20.
  • the transparent solid has a light entry surface 22 facing the light source, a light exit surface 24, a specular aperture surface 28 delimited by an aperture edge 26, and a first deflection surface 30 and a second deflection surface 32.
  • the diaphragm surface is arranged such that it protrudes into a light beam deflected at the first deflecting surface, so that the diaphragm edge separates a first partial light stream 34, which passes by the diaphragm edge, from a second partial light stream 36, which impinges on the diaphragm surface.
  • the light exit surface 24 here consists of a first light exit part surface 24.1 and a second light exit part surface 24.2.
  • the two light exit partial surfaces are separated from each other here by a structure lying between them. But this is not mandatory.
  • An advantage of the structural Separation consists in that the two partial surfaces 24.1 and 24.2 can be shaped differently in order to shape the emerging light differently.
  • the two partial surfaces 24.1 and 24.2 may in particular have different radii of curvature.
  • the two light exit partial surfaces are separated from each other here by a recess 37 lying between them. A depression, step or edge results to a certain extent automatically between the two light exit partial surfaces, if they are curved differently.
  • the transparent solid is preferably made of glass, PC, PMMA or other transparent material.
  • the diaphragm surface is further arranged so that it directs the second partial luminous flux directly onto the light exit surface.
  • the transparent solid has a light-gathering protuberance 38, which has the light inlet surface 22 facing the light source and which has a cross-section increasing in size with increasing distance from the light inlet surface and which is delimited by reflective side walls 40, 42. If the sidewalls have a reflective coating, for example a paint or a metallic coating, this produces the desired mirror effect. In an alternative embodiment, the desired light-collecting effect results from total internal reflections.
  • the cross section is perpendicular to the main propagation direction of the light in the protuberance and thus with the direction of the FIG. 1 in a yz plane.
  • the surfaces can also be represented as a rotationally symmetrical, in particular rotation paraboloid surface.
  • the semiconductor light source is preferably a white light-emitting light-emitting diode.
  • the light entry surface points a concave shape.
  • a large proportion of the light emitted by the semiconductor light source into the half space located in front of the semiconductor light source can be coupled into the light-collecting protuberance.
  • the light entry surface of the protuberance is shaped as an attachment optics, so that it has a central condenser lens section, refractive inner sidewalls and outer sidewalls, where experiences on the inner sidewalls light entering reflections.
  • Each light module preferably has a plurality of semiconductor light sources, which in a plane of the drawing of the FIG. 1 vertical direction next to each other.
  • the light-collecting protuberance merges into the remaining transparent solid body in a transition region and thus extends between its light entry surface and the transition region separately from the remaining solid body.
  • the transition area is at the direction of the FIG. 1 a lying in the yz plane surface, which lies in the x direction where the cross section of the Ausstülpungs Kunststoffs in which propagates the light only opposite to the x-direction, to a larger cross section of the transparent solid, in the light in the x-direction propagated. If there are multiple protuberances, there is one such area for each protuberance.
  • the surfaces do not have to lie in a common plane, but can be offset from one another. This can result in particular with differently long protuberances.
  • the protuberance extends along the main emission direction of the light coupled in via the light entry surface and represents a protrusion projecting from the remaining transparent solid.
  • the protuberance has a narrow side and two longitudinal sides.
  • the light entry surface 22 lies in the narrow side.
  • the reflective side walls 40, 42 are identical to the long sides. The side walls extend along a main propagation direction of the light coupled in via the light entry surface, which has not yet been deflected after the coupling.
  • the protuberance is only so wide that it limits the extent of the light bundle coupled in via the light entry surface by reflections taking place on the side walls 40, 42.
  • a limitation in this case takes place in particular and preferably via internal total reflections at the sections of the side walls 40, 42, in which the cross-sectional area of the protuberance increases. Due to the law of reflection, reflections which take place under these conditions result in a reduction in the opening angle of the light beam, which is also referred to below as parallelization.
  • the light of a semiconductor light source is coupled into the transparent solid body by a respective light source-specific protuberance.
  • the parallelized light bundle preformed by the protuberance is deflected in a direction which is transverse to the main propagation direction before the deflection.
  • the first deflection surface is preferably an interface at which internal total reflections occur and which therefore is not provided with a reflective coating.
  • the main propagation direction of the light is preferably about 70 ° to 110 °, in particular preferably about Changed from 80 ° to 100 °.
  • the rays incident on the first reflection surface all have similar angles of incidence of approximately 45 °. At this angle of incidence, a high proportion of the incident light is reflected, and only a small proportion is transmitted, so that there are only small light losses overall.
  • Concentration of the light on the diaphragm edge preferably takes place via the design of the protuberance 38 which forms the bundle of light beams. Alternatively or additionally, the concentration is effected by a correspondingly light-bundling design of the deflecting surface 30.
  • the limited by the diaphragm edge 26 reflective aperture surface 28, which is preferably also a TIR interface (TIR total internal reflection), is arranged so that it protrudes into the light deflection deflected at the first deflection. In particular, it protrudes into the deflected light bundle so far that the diaphragm edge 26 separates the first partial light flow 34, which passes by the diaphragm edge, from the second partial light flow 36, which strikes the diaphragm surface.
  • the diaphragm surface is furthermore arranged relative to the light exit surface 24 such that it directs the second partial light flow 36 directly onto the light exit surface.
  • a direct orientation is understood to mean that the second partial light stream 36 propagates in a straight path from the diaphragm surface 28 to the light exit surface 24, without any intervening therebetween to learn more direction changes.
  • the second deflection surface 32 which is preferably likewise a TIR interface of the transparent solid 20, is arranged in the light path of the first partial light stream 34 so that it directs incident light with the first partial light stream 34 onto the first light exit surface 24.1.
  • the first light exit partial area 24.1 is disjoint to the second light exit partial area 24.2, so that the two partial areas 24.1, 24.2 of the light exit area 24 have no overlap.
  • the second deflecting surface 32 and the first light exit partial surface 24. 1 are shaped such that they image the aperture edge 26 of the aperture surface 28 as a sharp light-dark boundary in the light distribution that emanates the light emerging from the transparent solid 20 via its light exit surface 24 generated in advance of the light module.
  • the second light exit partial area 24. 2 is preferably shaped in a cylinder-like manner so that the light emerging via this second light exit partial area generates a light distribution which has been widened in the horizontal direction.
  • the horizontal direction is the subject of the FIG. 1 perpendicular to the plane of the drawing and corresponds there to the y-direction.
  • This light distribution preferably has a slightly less sharp cut-off line.
  • FIG. 2 shows a light distribution, which is generated from the first partial light stream 34, which emerges from the first light exit partial surface 24.1.
  • the diaphragm edge 26 is thereby by the interaction of the second deflection surface 32 and the first light exit partial surface 24.1 in the light distribution sharp as a light-dark boundary 25 shown.
  • the closed curves are each lines of equal brightness (Isolux lines). This applies analogously to those in the FIGS. 3 and 4 illustrated light distributions, which, as well as the light distribution according to the FIG. 2 , in the run-up to the headlight on a perpendicular and transverse to the standing screen revealed.
  • FIGS. 2 to 4 H stands for the height of the horizon and V for a vertical which intersects the horizon approximately in an extension of the main emission direction of the light module.
  • the sharp cut-off line 25 is approximately at the level of the horizon.
  • FIG. 3 shows a light distribution, which is generated from the second partial light stream 36, which emerges from the transparent solid via the second light exit partial surface 24.2. It is a spread in a horizontal direction light distribution with less sharp cut-off.
  • Such a light distribution is particularly suitable as a broad basic light distribution, which is characterized by a narrower Abbleriumtspot, as shown in the FIG. 2 is shown is supplemented. This basic light distribution is below the horizon.
  • the FIG. 4 shows a low beam spot, which is generated from the first partial light stream 34, which emerges from the first light exit partial surface 24.1.
  • the diaphragm edge 26 is sharply imaged by the interaction of the second deflection surface 32 and the first light exit partial surface 24.1 in the light distribution.
  • the diaphragm edge here in the plane of the drawing FIG. 1 vertical direction a kink.
  • This Abblertztspot is preferred in the operation of the light module by the basic light distribution of the FIG. 3 added to a cumulative light distribution.
  • a light distribution as in the FIG. 2 is shown, from the second partial luminous flux 36 and the second light exit partial surface 24.2 in the lower part of the light exit surface (ie with light-dark boundary) is generated.
  • illustrated light distribution in the further embodiment also be generated from the first partial light stream 34 and the first light exit partial surface 24.1.
  • an asymmetrical low beam spot forming light distribution can also be generated from the second partial light stream 36 and the second light exit partial area 24.2.
  • the light coupled into the projection is split into two partial light streams 35, 36 by the parallelization and bundling and the aperture surface 28 projecting into the parallelized light.
  • the greatest possible focus is aimed at the diaphragm edge without the divergence (the opening angle) of the light beam becoming too large in order to prevent excess light flux from being lost at the first deflection surface due to the lack of internal total reflection.
  • FIG. 3 For example, a division into a broad basic light distribution, as in the FIG. 3 is shown, and a low beam spot possible, as he both by the FIG. 2 as well as through the FIG. 4 will be shown.
  • the FIG. 1 shows in particular a structure which causes a division on two partial light distributions, which complement each other in the vertical direction.
  • the transparent solid has a subdivision into at least three partial light streams emerging from the light exit surface at a minimum offset from one another.
  • the diaphragm surfaces and diaphragm edges used for this essentially run horizontally (i.e., apart from creases or steps to produce an asymmetrical low beam).
  • the transparent solid has a subdivision into at least two partial luminous streams emerging horizontally next to one another from the light exit surface when the diaphragm surfaces and diaphragm edges are used horizontally.
  • Such a division is analogous to that with reference to the FIGS. 1 to 4 described division generated by intended use vertically extending diaphragm surfaces and diaphragm edges.
  • each generate by means of vertical and / or horizontal aperture surfaces and aperture edges separated from each running partial light streams.
  • the first deflection surface, the diaphragm surface and the second deflection surface as at least in the illustrated vertical section planar surfaces realized.
  • At least one of these surfaces is a curved surface, which directs the outgoing light bundle not only on the light exit surface, but also forms the light bundle in a suitable manner, for example, together with a further shaping of the light beam through the light exit surface to generate compliant light distribution.
  • a homogeneous curvature is understood to mean a curvature which does not change its sign, that is to say either continuous concave or continuous convex and which has no sudden changes in its magnitude (apart from an outer edge of the light exit surface).
  • Another embodiment is characterized in that at least a portion of the light exit surface 24 is provided with a microstructure which produces a targeted additional scattering effect, for example, to produce a rule-compliant overhead light, are illuminated with the signs sufficiently bright, without causing other road users are dazzled.
  • the transparent solid is an integrally connected block.
  • the transparent solid body consists of several individual parts, which are connected to each other during manufacture, for example with a transparent adhesive. This results in shorter process times and more accurate surfaces in manufacturing because the cooling time of parts of the transparent solid produced by injection molding is shorter than the long cooling time of a one-piece injection molded block.
  • FIG. 1 a separation surface 44 is shown, along which an upper half is joined to a lower half of the transparent solid.
  • a further embodiment provides for a horizontal incision.
  • the incision goes from the recess 37 in the FIG. 1 , which there separates the two light exit partial surfaces 24.1 and 24.2 from each other, and extends so far to the rear, so to the light exit surface 24 facing away from the back of the transparent solid, that of the first Deflection to the second deflection directed partial light flow is not yet shadowed.
  • a point 46 is shown marking a possible end of such an incision.
  • an intransparent layer is also conceivable if the transparent solid is assembled along this surface from individual parts. In this case, for example, the non-transparent layer extends from the recess 37 to the point 46.
  • the invention makes it possible in principle, all reflections that occur in the transparent solid, be it reflections within the protuberance (respectively the projection) and / or reflections on the first deflection surface, and / or reflections on the diaphragm surface and / or reflections on the second deflection, to take place as internal total reflections.
  • one embodiment provides for complete or even partial reflection of these interfaces by applying a reflective lacquer layer or metal layer.
  • Another embodiment relates to the generation of the diaphragm edge.
  • the transparent solid generated without this edge. Then the transparent solid is measured, and additional transparent filler material is applied where the diaphragm edge should lie. As a result, a highly accurate position of the diaphragm edge can be achieved.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP16158169.9A 2015-03-19 2016-03-02 Module lumineux de projection pour un phare de véhicule automobile Withdrawn EP3070395A1 (fr)

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Application Number Priority Date Filing Date Title
DE102015204961.2A DE102015204961A1 (de) 2015-03-19 2015-03-19 Projektionslichtmodul für einen Kraftfahrzeugscheinwerfer

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Publication number Priority date Publication date Assignee Title
DE102018127689A1 (de) * 2018-11-06 2020-05-07 HELLA GmbH & Co. KGaA Abbildungseinheit sowie Scheinwerfer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10252228A1 (de) * 2002-02-05 2003-08-07 Automotive Lighting Reutlingen Scheinwerfer, insbesondere für Kraftfahrzeuge
DE102004005931A1 (de) * 2003-02-10 2004-08-26 Koito Manufacturing Co., Ltd. Fahrzeugscheinwerfer und optische Einheit
US20060087860A1 (en) * 2004-10-27 2006-04-27 Koito Manufacturing Co., Ltd. Vehicle illumination lamp
US20090073710A1 (en) * 2004-11-18 2009-03-19 Koninklijke Philips Electronics, N.V. Illumination system and vehicular headlamp
EP2607774A2 (fr) * 2011-12-21 2013-06-26 Automotive Lighting Reutlingen GmbH Dispositif d'éclairage d'un véhicule automobile avec une surface lumineuse longue et plane
DE102012213845A1 (de) * 2012-08-03 2014-02-06 Automotive Lighting Reutlingen Gmbh Lichtleitelement und Lichtmodul
CN203478076U (zh) * 2013-10-17 2014-03-12 孟阳 单光源双光束机动车照明灯
DE102013210257A1 (de) * 2013-06-03 2014-12-18 Automotive Lighting Reutlingen Gmbh Vorsatzoptik für eine Lichtquelle

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10252228A1 (de) * 2002-02-05 2003-08-07 Automotive Lighting Reutlingen Scheinwerfer, insbesondere für Kraftfahrzeuge
DE102004005931A1 (de) * 2003-02-10 2004-08-26 Koito Manufacturing Co., Ltd. Fahrzeugscheinwerfer und optische Einheit
US20060087860A1 (en) * 2004-10-27 2006-04-27 Koito Manufacturing Co., Ltd. Vehicle illumination lamp
US7207705B2 (en) 2004-10-27 2007-04-24 Koito Manufacturing Co., Ltd. Vehicle illumination lamp
US20090073710A1 (en) * 2004-11-18 2009-03-19 Koninklijke Philips Electronics, N.V. Illumination system and vehicular headlamp
EP2607774A2 (fr) * 2011-12-21 2013-06-26 Automotive Lighting Reutlingen GmbH Dispositif d'éclairage d'un véhicule automobile avec une surface lumineuse longue et plane
DE102012213845A1 (de) * 2012-08-03 2014-02-06 Automotive Lighting Reutlingen Gmbh Lichtleitelement und Lichtmodul
DE102013210257A1 (de) * 2013-06-03 2014-12-18 Automotive Lighting Reutlingen Gmbh Vorsatzoptik für eine Lichtquelle
CN203478076U (zh) * 2013-10-17 2014-03-12 孟阳 单光源双光束机动车照明灯

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