EP2789900A2 - Module d'éclairage pour un dispositif d'éclairage de véhicule automobile - Google Patents

Module d'éclairage pour un dispositif d'éclairage de véhicule automobile Download PDF

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Publication number
EP2789900A2
EP2789900A2 EP14160764.8A EP14160764A EP2789900A2 EP 2789900 A2 EP2789900 A2 EP 2789900A2 EP 14160764 A EP14160764 A EP 14160764A EP 2789900 A2 EP2789900 A2 EP 2789900A2
Authority
EP
European Patent Office
Prior art keywords
light
reflector
light module
module
lens
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
EP14160764.8A
Other languages
German (de)
English (en)
Other versions
EP2789900A3 (fr
EP2789900B1 (fr
Inventor
Matthias Brendle
Emil P. Stefanov
Armin Austerschulte
Hubert Zwick
Hermann Kellermann
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 EP2789900A2 publication Critical patent/EP2789900A2/fr
Publication of EP2789900A3 publication Critical patent/EP2789900A3/fr
Application granted granted Critical
Publication of EP2789900B1 publication Critical patent/EP2789900B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • 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]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • 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
    • F21S41/26—Elongated 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
    • F21S41/30—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
    • F21S41/334—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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/635—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by moving refractors, filters or transparent cover plates
    • 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
    • F21S41/30—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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device

Definitions

  • the present invention relates to a light module of a lighting device of a motor vehicle.
  • the light module comprises a light source arrangement having a plurality of separately controllable light sources combined to form an array for emitting light, a plurality of primary optics grouped into a primary optic array in the form of converging lenses each having a light entrance surface and a light exit surface and also a secondary optics system for imaging the emitted light on a roadway the motor vehicle as the resulting total light distribution of the light module.
  • the primary optics elements are designed to bundle at least part of the light emitted by the light sources and to generate an intermediate light distribution on the light exit surfaces.
  • the invention relates to a lighting device with one or more such light modules.
  • Reflector systems have advantages over lens systems because they have no chromatic aberrations, are easy and inexpensive to produce, especially when large optical surfaces are required, and do not cause stray light by Fresnel reflections.
  • a square light source is therefore not reproduced as a square but trapezoidally or mushroom-like deformed, whereby the size, position and orientation of the image can depend strongly on the position of the light source in the object field.
  • a system which is intended to generate several straight, sharply delimited light distributions with a defined position of the individual light-dark boundaries from a plurality of semiconductor light sources must in principle have imaging properties.
  • a corresponding total light distribution of the light module must therefore be constructed or assembled from identically sized and identically oriented light source images.
  • the known matrix high-beam modules usually use single-chip LEDs, in particular SMD (Surface Mounted Device) LEDs, in conjunction with a primary optics array.
  • the primary optics array generates intermediate images on the light exit surfaces of the primary optics elements of the optics array), which are then projected onto the roadway by the secondary optics downstream in the beam path.
  • the areas of the intermediate images are quite large due to the distances between the LEDs, which requires projection lenses with a very large focal length.
  • the resulting light modules are therefore relatively bulky, which is disadvantageous for use in motor vehicles, since there is only a relatively limited installation space for the light modules or equipped with these lighting devices available.
  • the present invention has the object, to design a light module for generating a resulting total light distribution from the light of light-like arranged matrix-like light sources and further that a particularly homogeneous overall light distribution can be achieved.
  • Particular emphasis should be placed on a compact size and a short overall length of the light module.
  • the projections of one or more Intermediate light distributions deliberately removed from the areas of total light distribution, where other road users are.
  • a light module of a motor vehicle lighting device having all the features of patent claim 1.
  • the secondary optics system for imaging the intermediate light distributions on the road ahead of the motor vehicle is focused on at least one of the light exit surfaces of the converging lenses as the resulting total light distribution of the light module.
  • the light module comprises a plurality of primary optics elements combined to form a primary optic array, each having a light entry surface and a light exit surface.
  • the primary optics elements are designed to bundle at least part of the light emitted by the light sources and to generate intermediate light distributions on the light exit surfaces of the primary optics elements.
  • the secondary optics system is focused on at least one of the light exit surfaces for imaging the intermediate light distributions on the roadway in front of the motor vehicle as the resulting total light distribution of the light module. It is conceivable that the secondary optics not only have one focal point, but a plurality of focal points, wherein a plurality of the focal points may be focused on a plurality of the light exit surfaces. It is not necessary (and in practice also difficult to realize) that the focal point or points of secondary optics are focused on the exit surfaces of all primary optic elements.
  • the light module thus comprises a semiconductor light source array and a primary optics array, wherein the intermediate light distributions generated on the light exit surfaces of the optical array are projected onto the roadway by the secondary optics system. So there are no images of the Light sources, but only illuminated areas projected onto the road.
  • the combination of the light source array with the primary optics array is also referred to below as a replacement light source array.
  • a light source and the primary optics element associated therewith is also referred to as a substitute light source, wherein a plurality of substitute light sources can be arranged directly next to or above one another to form an array.
  • the primary optic elements arranged side by side in one or more rows form the primary optic array. Since the primary optic elements are generally larger than the light sources respectively associated with the primary optics elements, relatively large distances between the individual light sources result for a replacement light source array.
  • the converging lenses in the object-side Petzval surface of the secondary optics do not produce any images of the light sources.
  • the light exit surfaces of the converging lenses are merely illuminated.
  • the secondary optics are focused on one or more of these illuminated areas.
  • the collecting lens array has a uniform luminance on the light exit surfaces without maxima. This applies in particular to the light distribution in the sections perpendicular to the light-dark boundaries or pixel boundaries. Secondary optics thus focuses on the exit pupil of the primary optic array.
  • the shaping of the light distribution ie the vertical and / or horizontal course of the pixels, to realize the total light distribution of the light module at least partially by the secondary optics.
  • the shaping of the light distribution takes place completely or almost completely by the secondary optics. This is in particular in the case of a primary optic array in the form of a collecting lens array, since no appreciable illuminance differences can be produced in the exit pupil of the primary optics. In this case, the light shaping can thus be almost completely by an example. Toric secondary optics.
  • the light sources are advantageously designed as semiconductor light sources, in particular as LED light sources, LED arrays, as single-chip LEDs or as SMD LEDs.
  • the image-side focal point, the primary optics in the emission direction coincides with the object-side focal point of the subsequent secondary optics.
  • Both optics have the same optical axes (axes of rotation of lenses and reflectors).
  • a secondary optic with several reflectors or mirrors connected in series allows the optical path to be folded, which considerably shortens the overall length of the light module.
  • the focal point of the secondary optics is preferably located on a light exit surface of the replacement light source array and forms this on the roadway.
  • the secondary optics are designed so that all optical paths between the focal point and the (infinitely distant) pixel are the same length.
  • the light source or replacement light source array radiates at an acute angle, preferably counter to the direction of travel of the vehicle or obliquely in the reflector, ie, the beam path is folded by the reflector at an acute angle.
  • the reflector is preferably faceted such that all facet surfaces have approximately equal distances to a common focal point of the reflector. All facet edges facing away from the optical axis (rotation axis) of the light module have greater distances to the common reflector focal point than the facet inner edges, which lie on the side of the optical axis.
  • the facet edges are perpendicular to the light-dark boundaries of the resulting total light distribution (eg vertical cut-off for the stripline ⁇ horizontal facet edges).
  • Also concentric about the optical axis arranged annular reflector facets are advantageous.
  • the present invention relates to a light module, which is designated in the figures in its entirety and by the reference numeral 1.
  • the light module 1 is provided for installation in a lighting device (not shown) of a motor vehicle.
  • the illumination device is preferably designed as a motor vehicle headlight. But it can also be designed as a motor vehicle light. It usually comprises a housing with a light exit opening, which is closed by means of a transparent cover.
  • the light module 1 can be arranged rigidly or movably in the housing. By moving the light module 1 relative to the housing, a headlight range control and / or a cornering light function can be realized.
  • Several light modules 1 according to the invention can be arranged in the housing. However, it is also conceivable that the light module 1 according to the invention is arranged in the housing together with other light modules not according to the invention.
  • the light module 1 comprises a light source arrangement 15 (cf. FIG. 2 ) with at least two light sources 16, which are preferably designed as semiconductor light sources, and a common secondary optics 4.
  • the light module 1 may comprise a primary optics array 17 with a plurality of primary optics elements 18 which focus the light emitted by the light sources 16.
  • the light source arrangement is also referred to as a spare light source array 2.
  • the secondary optics 4 preferably focuses on the light exit surfaces 25 of the replacement light source array 2 and the primary optics elements 18.
  • the intermediate light distributions generated by the light sources on the light exit surfaces 25 of the primary optics array 17 are preferably combined with each other such that the individual light distributions 6 'are at least partially superimposed or add and thus form the resulting total light distribution 5 of the light module 1.
  • the total light distribution 5 is, for example, a so-called glare-free high beam.
  • the secondary optics 4 is not focused on images of the light sources 16, but on the light exit surfaces 25 of the primary optics elements 18.
  • FIG. 15 shows a section of a replacement light source assembly 2 for use in a light module according to the invention 1. It is exemplified one of a plurality of semiconductor light sources 16 in the form of an LED chip. In the light exit direction after the LED chip 16, one of a plurality of converging lenses 18 of the collecting lens array 17 is shown by way of example. A pitch of the lens array 17 is designated T. The division T corresponds the width of the individual collecting lenses 18 and the distance of the centers of adjacent LED chips 16. With B LED an edge length of the LED chip 16 is designated. A virtual LED chip is designated 16 '. The edge length of the virtual LED chip 16 'is denoted by B' LED .
  • An object-side focal point of the condenser lens 18 is F and a major point of the lens 18 is H.
  • the principal point H of a lens is defined as the intersection of a principal plane of the lens with the optical axis.
  • the secondary optics 4 of the light module 1 according to the invention is preferably focused on a main point H of one of the converging lenses 18, preferably on the main point H of the converging lens 18 located in the vicinity of an optical axis 7 of the light module 1.
  • the reference f denotes the focal length of the lens 18 and S F a cross-sectional width of the lens 18.
  • a distance between the LED chip 16 and the light entrance surface of the condenser lens 18 is S 1 and a distance between the virtual chip image 16 'and the light entrance surface the lens 18 designated S 2 .
  • the LED chip 16 is located between the lens 18 and its object-side focal point F.
  • the LED chip 16 is enlarged by the lens 18 so that the (upright) virtual image 16 'of the chip (in the light exit direction in front of the object-side lens focal point F) is the same size as the lens 18, ie B ' LED ⁇ T.
  • the collecting lenses 18 of the lens array 17 are not used to produce real intermediate images of the light sources 16, but form only an illuminated surface on the Light exit side 25 of the converging lenses 18.
  • the light sources 16 are arranged between the light entry surfaces of the lenses 18 and the object focal points F of the lenses 18, that the edges of the light sources 16 are on geometric connections from the focal points F to the lens edges.
  • the emission surfaces of the light sources 16 are arranged perpendicular to the optical axes of the lenses 18. This results in a very uniform illumination of the lenses 18 and on the light exit surfaces 25 of the lenses 18 a particularly homogeneous light distribution, the so-called. Intermediate light distribution.
  • the optical axes of the individual lenses 18 of the array 17 all run in one plane, preferably they are parallel to one another.
  • the axis of the secondary optics 4 is on the side facing the primary optics 17, parallel to the axis of at least one of the lenses 18th
  • FIG. 1 shows a first embodiment of a light module according to the invention 1.
  • the light module 1 has a plurality of separately controllable, combined into an array semiconductor light sources 16 (see. FIG. 2 ) to emit light.
  • a plurality of LEDs 16 are arranged in a row next to one another.
  • the LEDs 16 may be arranged in a plurality of rows one above the other like a matrix.
  • Each of the semiconductor light sources 16 is a primary optic element 18 (see FIG. FIG. 3 ) for bundling at least part of the light emitted by the light source 16 and for generating an intermediate light distribution on the light exit surface 25.
  • the primary optic elements 18 are combined to form a primary optic array 17.
  • the primary optics elements 18 are preferably designed as collecting lenses, which are combined to form a collecting lens array.
  • the primary optics array 17 or the individual primary optics elements 18 may also be referred to as intent optics become.
  • the intermediate light distributions are generated on light exit surfaces of the primary optics elements 18.
  • the intermediate light distributions are imaged by the secondary optics system 4 on the road ahead of the motor vehicle as individual light distributions 6 'for generating the resulting total light distribution 5 of the light module 1.
  • the combination of the semiconductor light source array 15 and the primary optics array 17 is subsequently also referred to as a replacement light source array 2.
  • the semiconductor light sources 16 are arranged on a heat sink 3 for thermal stabilization, in particular for dissipating waste heat arising during the operation of the semiconductor light sources 16, directly or indirectly via a printed circuit board 19 or the like.
  • the secondary optics system 4 is formed in the illustrated example as a horizontally faceted reflector, in particular parabolic reflector. That in a vertical section of the reflector 4 comprises a plurality of superimposed facets.
  • the secondary optics system 4 focuses on the light exit surfaces 25 of the primary optics elements 18 and the replacement light source array 2.
  • a resulting total light distribution 5 of the light module 1 is shown by way of example on a measuring screen 6 which is arranged at a defined distance from the light module 1.
  • the total light distribution 5 comprises a plurality of individual light distributions 6 ', which are generated by the individual elements 16, 18 of the replacement light source array 2 in cooperation with the secondary optics system 4.
  • an optical axis 7 of the light module 1 located.
  • a sagittal plane 8 has a substantially horizontal surface extension and comprises the optical axis 7.
  • a meridional plane 9 has a substantially vertical extension and likewise comprises the optical axis 7.
  • a section line between the sagittal plane 8 and the measuring screen 6 forms a horizontal HH 10, and a cut line between the meridional plane 9 and the measuring screen 6 forms a vertical VV 11.
  • the optical axis 7 passes through the intersection HV of the horizontal 10 and the vertical 11. It can be clearly seen that the resulting total light distribution 5 both below the horizontal 10 and above the horizontal 10 extends.
  • the total light distribution 5 may be, for example, a so-called matrix main beam or a so-called strip main beam or a part thereof. However, the total light distribution 5 can also form a particularly bright illuminated central area of a high beam (high beam spot).
  • a focal point of the faceted parabolic reflector 4 is in FIG. 1 denoted by the reference numeral 12.
  • the focal point 12 is located on a light exit surface 25 of the replacement light source array 2 or on a light exit surface 25 of the primary optic array 17, in particular on a centroid of the Editlichtánnarrays 2.
  • the beam path of a main beam is denoted by the reference numeral 13 and the beam path of a secondary beam by the reference numeral 14.
  • the main beam 13 results from a substantially in Hauptabstrahlraum 29 (see. FIG. 8 ) of the light sources 16 emitted light beam, by shaping and possibly deflection by one of the light source 16 associated primary optics 18 and by deflection at the secondary optics system 4.
  • the secondary beam 14 results accordingly by an obliquely to the main emission direction 29 emitted light beam 29 '.
  • FIG. 2 shows an enlarged view of a light source array 15 of the light module according to the invention 1, which comprises a plurality of, in the illustrated embodiment, five side by side in a straight line arranged LED chips 16.
  • the individual light sources 16 in other ways than in FIG. 2 be shown, for example. Matrix-like in several rows and columns.
  • the light source array 15 may have a different number of Single light sources 16 have as in FIG. 2 shown.
  • the light source array includes a light source array 15 and a primary optics array 17.
  • the light source array 15 includes a plurality of SMD (Surface Mounted Device) LEDs 16, which in the illustrated example are disposed immediately adjacent to one another in a straight line.
  • the primary optics array 17 comprises a plurality of, in the illustrated example, five juxtaposed collecting lenses 18.
  • the LEDs 16 of the light source array 15 are arranged and contacted in a common plane, preferably on a common printed circuit board 19.
  • the combination of the light source array 15 and the primary optics array 17 forms the replacement light source array 2.
  • Each primary optics element 18 is assigned at least one light source 16.
  • each primary optics element 18 is associated with exactly one semiconductor light source 16.
  • the arrangement of the collecting lenses 18 in the collecting lens array 17 thus corresponds to the arrangement of the light sources 16 in the light source array 15.
  • the light exit surfaces 25 of the primary optics elements 18 preferably directly adjoin one another.
  • the primary optics elements 18 are larger than the LED chips or SMD LEDs 16 assigned to them, two distances between the individual semiconductor light sources 16 result in the replacement light source array.
  • FIG. 4 shows the spare light source array 2 FIG. 3 in different views.
  • the individual primary optics elements 18 are designed as plano-convex converging lenses.
  • the primary optics array 17 is thus a lens array, which is preferably constructed of plano-convex lenses.
  • the lens array 17 may be made of organic or inorganic glass or of silicone rubber (LSR, Liquid Silicone Rubber).
  • Organic glasses are, for example, polymethyl methacrylate (PMMA), cycloolefin copolymer (COC), Cycloolefin polymer (COP), polycarbonate (PC), polysulfone (PSU) or polymethacrylmethylimide (PMMI).
  • PMMA polymethyl methacrylate
  • COC cycloolefin copolymer
  • COP Cycloolefin polymer
  • PC polycarbonate
  • PSU polysulfone
  • PMMI polymethacrylmethylimide
  • a total of six LEDs 16 are associated with six primary optics elements 18.
  • FIG. 4 a focal plane of the secondary optics (not shown) designated by the reference numeral 20.
  • a focal point of the secondary optics 4 is designated by the reference numeral 21.
  • a division between two adjacent individual light sources 16 or between two adjacent primary optics elements 18 is denoted by T. In this case, the division T from the center of a light source 16 or a primary optics element 18 to the center of the adjacent light source 16 or of the adjacent primary optics element 18 is indicated.
  • FIG. 5 Another example of a replacement light source array 2 for use in a light module 1 is shown in various views.
  • the primary optics elements 18 are designed as reflectors. These have a square cross-section in the example shown.
  • the light exit surfaces 25 of the individual reflectors 18 line up seamlessly and limit the luminous surface with sharp, straight edges.
  • Each light source 16 (comprising at least one LED) is preferably associated with a reflector element 18.
  • a (perforated) heat shield 22 can be provided between the reflector array 17 and the light source array 15, which protects the back of the reflector array 17 from radiation. The heat shield 22 prevents thermal overload of the reflector material.
  • the reflectors 18 extend conically from the light entrance to the light exit 25 out. Perpendicular to an optical axis 23 or to the main radiation direction 29 of the light sources 16 (see. FIG. 8a ), the reflectors 18 preferably have triangular, square or rectangular cross sections. Particularly preferably, the reflectors 18 have the geometry of a truncated pyramid.
  • the reflecting surface of the reflectors 18 is preferably made of cylindrical hyperboloids or plane mirrors as a special case of the hyperboloid.
  • the reflector array 17 consists of a metallized, high temperature resistant plastic, in particular of a thermoplastic material. High-temperature-resistant thermoplastics which are suitable are, for example, polyether ether ketone, polyether imide or polysulfone.
  • the metallization consists for example of aluminum, silver, platinum, gold, nickel, chromium, copper, tin or alloys containing at least one of these metals.
  • the metallization is preferably sealed by a transparent layer after application to the reflective surface.
  • a multilayer coating can also be applied to the plastic body. Multilayer coating alternately combines several low- and high-index layers.
  • a further metal layer may be provided as a radiation barrier.
  • This metal layer is deposited, for example as a copper or nickel layer on the plastic body of the reflector array 17 and thus forms a protection against the thermal stress by the radiation of the LEDs 16.
  • This metal layer is also capable of heat to the reflector edge in the region of the light exit surface 25 out derive.
  • this metal layer is thicker than the metallized mirror layers on the reflective surfaces.
  • the reflector edges, ie the light exit surfaces 25 of the individual reflector elements 18 follow the course of a Petzval surface of the secondary optics 4 and are thus on a convexly curved shell (if the projection optics 4 is designed as a reflector) or on a concave curved Shell (when the projection optics 4 is designed as a lens).
  • FIG. 6 a further example of a replacement light source array 2 is shown, in which the primary optics elements 18 are formed as optical fibers.
  • the light guide array 17 comprises in a straight line juxtaposed light guide 18, each of which widens conically towards the light exit 25.
  • the light guides 18 are preferably triangular, square or rectangular cross-sections.
  • the light guide elements 18 have a rectangular or square cross-section.
  • the light guides 18 have the geometry of a truncated pyramid.
  • the light entry surface of the individual light guide elements 18 is preferably flat and runs parallel to a chip surface of the associated light source 16 (comprising at least one LED).
  • the light exit surface 25 of the individual light guides 18 is preferably convex.
  • the light guide array 17 is made of organic or inorganic glass or silicone rubber (LSR).
  • Organic glasses are for example PMMA, COC, COP, PC, PSU or PMMI.
  • the light exit surfaces 25 of the conical light guides 18 follow a Petzval products the secondary optics system 4 and are thus on a convexly curved shell (in a projection optics 4 with reflector) or on a concave curved shell (in a projection optics 4 with lens).
  • the replacement light source array 2 includes a primary optics array 17 composed of a plurality of disk-shaped light guides 18.
  • the individual light guides 18 each have a light entry surface 24, a light exit surface 25, a reflector surface 26, and two transport surfaces 27, wherein the light entry and exit surfaces 24, 25 in combination with the reflector surface 26 form two focal lines that obey the imaging law:
  • the image-side focal line 30a is located on the light exit surface 25 of the light guide 18.
  • the lateral transport surfaces 27 of the light guide 18 extend to the light exit surface 25 towards steadily (see. FIG.
  • the reflector surface 26 is a control surface.
  • the light entry surface 24 of the light guide 18 is preferably flat and runs parallel to the chip surface of the associated LED light source 16. However, it is also conceivable that the light entry surface 24 is slightly inclined relative to the chip surface of the LED 16, so that both surfaces form a conical air gap, which preferably widens toward the trailing edge of the light guide 18. The trailing edge is the edge facing away from the light exit side 25.
  • the light exit surface 25 of the light guide 18 is slightly curved, in particular convex.
  • the light exit surface 25 of the disc light guides 18 follow the Petzval compounds 20a of the secondary optics system 4 and are thus on a convexly curved shell (at a secondary optics 4 with reflector) or on a concave curved shell (at a secondary optics 4 with lens).
  • the array 17 with optical waveguide disks 18 is preferably made of organic or inorganic glass or of silicone rubber LSR.
  • Organic glasses are for example PMMA, COC, COP, PC, PSU or PMMI.
  • the main emission direction of a light source 16 is representative of all light sources 16 of the light source array 15 by the reference numeral 29.
  • the main emission direction 29 coincides with the optical axis of the light source 16.
  • Reference numeral 30 denotes a focal line of the light guide 18.
  • FIGS. 10 to 14 show various embodiments of a light module 1 according to the invention in section.
  • a large part of the optical surface of the secondary optics 4 has a first object-side focal point and a common image-side focal point at infinity.
  • the secondary optics 4 thus generates an image of the replacement light source arrangement 2 or its light exit surfaces 25 at infinity.
  • the secondary optics system 4 may comprise, for example, a parabolic mirror, in particular a faceted parabolic mirror (cf. FIGS. 1 and 13 ), whose focal point 31 lies on the light exit surface 25 of the primary optic array 17.
  • the parabolic reflector 4 is faceted so that all facet surfaces have approximately the same distances from the common focal point 31.
  • All of the facet edges facing away from the optical axis (rotation axis) 7 of the light module 1 have greater distances from the common reflector focal point 31 than the facet inner edges lying on the side of the optical axis 7.
  • the facet edges are perpendicular to the light-dark boundary of the light distribution 5 (ie vertical light-dark boundary in the striplight ⁇ horizontal facet edges), as in FIG FIG. 1 shown.
  • the facet edges can also be circular and concentric around the optical axis 7 (axis of rotation) of the reflector 4, 4 'extend.
  • the secondary optics system 4 of the light module 1 can also comprise a converging lens, which is focused on the light exit surfaces 25 of the primary optics elements 18.
  • the converging lens may be formed as a toric (astigmatic) converging lens, which has different refractive powers in the meridional and sagittal sections 8, 9.
  • the condenser lens can also be designed as an astigmatic condenser lens.
  • the secondary optics system 4 may also comprise a color correcting two-lingual system (achromat): a low dispersion color condensing lens and a large color dispersion dispersing lens.
  • the secondary optics system 4 comprises a reflector in the form of a hyperboloid 4 'or a plane mirror as a special case of the hyperboloid with a reflector arranged behind it in the form of a paraboloid 4 ", in particular a facetted paraboloid Hyperboloids 4 'lies on the light exit surface 25 of the replacement light source array 2 and forms the object-side focal point of the entire secondary optical system 4.
  • the light module 1 is - as stated - shown with a two-part secondary optics system 4, consisting of a plane mirror 4 'and a paraboloid of revolution 4 "The resulting secondary optics system 4 has an optical axis 32 (axis of rotation)
  • the paraboloid 4" focuses on the virtual image 2 'the light exit surface 25 of the Spare light source arrays 2, in particular on the centroid of the light exit surface 25 of the replacement light source array. 2
  • FIG. 11 Also, there is provided a two-piece secondary optical system 4 having two reflectors 4 ', 4 ".
  • the first reflector 4' of the secondary optics system 4 is formed as a concave (collecting) hyperboloid, thereby resulting in an enlarged virtual image of the substitute light source 2 than in the embodiment FIG. 10 , Furthermore, in FIG. 11 the image-side focal point 21 'of the hyperboloid 4' coincides with the focal point of the paraboloid 4 "and marks the position of the virtual intermediate image 2 'of the light exit surface 25 of the replacement light source array 2.
  • the secondary optics system 4 is likewise designed in several parts, in particular in two parts.
  • the light module 1 comprises a convex hyperboloid 4 '''and a paraboloid 4''.
  • the resulting secondary optical system 4 has the optical axis 32 (rotation axis).
  • the image-side focal point 21 'of the hyperbola mirror 4'" coincides with the focal point of the paraboloid 4" .
  • the paraboloid 4 "focuses on the reduced virtual image 2 'of the light exit surface 25 of the replacement light source array 2.
  • the secondary optics system 4 according to the embodiments of the FIGS. 10 to 12 Thus, two reflectors that are not based on conic sections and no sharp, undistorted intermediate image 2 'of the light exit surface 25 of the spare light source array 2 supply. Rather, the secondary optics system 4 only forms the illuminated area 25 on the roadway.
  • the hyperboloid reflector 4 ', 4' " may also be faceted.
  • the image 21 'of the object-side focal point 21 is not at infinity. Therefore, the arrangement of the reflector facets would differ from a spherical surface.
  • the facets are preferably arranged so that the respective distances to the object and image-side focal points (hyperbola: virtual image) for all reflector facets have the same conditions as possible, so that the same possible image scales are achieved for all reflector zones.
  • the secondary optics system 4 comprises a hyperboloid reflector 4 'and a converging lens 4''''arranged behind the beam path.
  • the hyperboloid reflector 4 ' is preferably designed as a horizontally faceted hyperboloid.
  • An object-side focal point of the reflector 4 ' is designated by the reference numeral 31 and is located on the light exit surface 25 of the replacement light source assembly 2 or on the centroid thereof.
  • the secondary optics system 4 has an ellipsoidal reflector 4 "" and a diverging lens 4 ""'arranged behind it.
  • An image-side focal point 32 of the elliptical mirror 4 "" coincides with a virtual object-side focal point of the diverging lens 4 """.
  • the diverging lens 4 ''''''' focuses on the enlarged image 2 'of the spare light source array 2.
  • the ellipsoidal reflector 4 ''''' is preferably formed as a faceted ellipsoid, in particular with horizontal faceting.
  • the image 32 of the object-side focal point 31 is not at infinity. Therefore, the arrangement of the reflector facets deviates from a spherical surface.
  • the facets are preferably arranged so that the respective distances to the object and image-side focal points (ellipse: real image) for all reflector facets have the same conditions as possible, so that the same possible image scales are achieved for all reflector zones.
  • the secondary optics system 4 has a common optical axis 7.
  • the light module 1 is intended to provide dynamic cornering light, partial high beam, marker light or the like. to realize as resulting total light distribution 5 by selectively activating or deactivating individual light sources 16 or groups of light sources 16 without mechanically movable parts in the illumination device.
  • the light module 1 consisting of the Light source array 15, the primary optics array 17 and the secondary optics system 4, motorized about a vertical and / or horizontal axis relative to the housing of the illumination device in which the light module 1 is arranged, can be pivoted.
  • a dynamic cornering light can be pivoted into the curve.
  • a sectionfernlicht has a high beam distribution from the targeted specific areas are cut out, in which other road users are.
  • a marker light has a dimmed light distribution with a horizontal light-dark boundary, wherein targeted at least a narrow area above the cut-off line is illuminated to illuminate other road users or objects in this area targeted and the driver's attention with The motor vehicle equipped with the light module 1 can be directed to these other road users or objects.
  • the light module 1 can rotate about the vertical Axis be formed horizontally pivotable. To adjust a vertical cut-off line, the light module 1 can also be pivoted horizontally about the vertical axis and can be fixed in the adjusted position. Likewise, the light module for adjusting a horizontal cut-off line around a horizontal axis can be pivoted vertically and set in the adjusted position. The adjusted position of the cut-off line then forms the zero point for a curve light function and / or headlight range control function to be performed during the operation of the light module 1.

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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)
EP14160764.8A 2013-04-11 2014-03-19 Module d'éclairage pour un dispositif d'éclairage de véhicule automobile Active EP2789900B1 (fr)

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US11873957B2 (en) 2016-02-22 2024-01-16 Valeo Vision Light beam projection device provided with submatrices of light sources, lighting and headlight module provided with such a device
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US11994264B2 (en) 2020-09-18 2024-05-28 HELLA GmbH & Co. KGaA Lighting device for a motor vehicle headlight with a first optical component and second optical system

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CN104100902A (zh) 2014-10-15
CN104100902B (zh) 2017-11-28
EP2789900A3 (fr) 2016-08-31
US20140307459A1 (en) 2014-10-16
US9599304B2 (en) 2017-03-21
DE102013206488A1 (de) 2014-10-30
EP2789900B1 (fr) 2017-06-21

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