EP3611425A1 - Leuchtmodul eines kraftfahrzeugs, das in der lage ist, einen lichtstrahl mit mindestens einer reihe von leuchteinheiten zu erzeugen - Google Patents

Leuchtmodul eines kraftfahrzeugs, das in der lage ist, einen lichtstrahl mit mindestens einer reihe von leuchteinheiten zu erzeugen Download PDF

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Publication number
EP3611425A1
EP3611425A1 EP19188789.2A EP19188789A EP3611425A1 EP 3611425 A1 EP3611425 A1 EP 3611425A1 EP 19188789 A EP19188789 A EP 19188789A EP 3611425 A1 EP3611425 A1 EP 3611425A1
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EP
European Patent Office
Prior art keywords
light
light module
row
guides
illumination unit
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
EP19188789.2A
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English (en)
French (fr)
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EP3611425B1 (de
Inventor
Pierre Renaud
Alexandre Joerg
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Valeo Vision SAS
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Valeo Vision SAS
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Publication of EP3611425A1 publication Critical patent/EP3611425A1/de
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    • 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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • 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
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
    • 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
    • F21S41/322—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
    • F21S41/60—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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • F21W2102/14—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having vertical cut-off lines; specially adapted for adaptive high beams, i.e. wherein the beam is broader but avoids glaring other road users
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a motor vehicle light system which is capable of producing a light beam projecting forward an image comprising at least one horizontal row of illumination units.
  • Such a light beam is also called a pixel beam or “pixel beam” or “multibeam” in English.
  • these illumination units are arranged side by side in a horizontal row. There may be one or more horizontal rows of illumination units.
  • the beam By switching off or on selectively each elementary light source, the off or on state of the corresponding illumination unit is checked.
  • the beam then consists of a plurality of illumination units, on or off depending on the presence of other vehicles in the emission zone.
  • the light module capable of generating such a light beam is often used in addition to a light module producing a portion of the main beam in front lighting devices to perform an adaptive lighting function, also called “Adaptive Driving Beam "Or ADB in English.
  • a low portion which can come from another module, lights up under the horizon and the illuminated lighting units complement the lighting above this low portion and the horizon so as to form a long range beam.
  • the illumination units can then be turned off so as to create a gray area at the location of another vehicle being followed or coming in the opposite direction. Consequently, the risk of dazzling the driver of the other vehicle is reduced while maintaining good visibility of the road thanks to the illumination units which are not switched off.
  • the light module forming a pixelated light beam can also be used in addition to a light module forming a passing beam, also called a code beam, or a low portion of passing beam.
  • the pixelated light beam can form a dynamic turn distribution in order to perform a dynamic turn function, or also called "dynamic bending light" or DBL in English, allowing the light beam to follow the curvature of the turns followed by the vehicle.
  • ADB or DBL functions are lighting functions which improve the quality and the comfort of visibility of the lighting device. There is therefore a growing development of lighting devices integrating these functions.
  • the photometry of a regulatory passing beam must include areas whose light intensity respects values imposed by regulations.
  • each illumination unit has a height greater than 0.57 °, and for example from 0.7 ° to 1 °, at least one illumination unit of said row is superimposed on the BRR segment of the beam of basic crossover.
  • the illumination unit brings additional light intensity to the area of the BRR segment. This may cause the light intensity of the BRR segment to exceed the regulatory value and therefore make the lighting device non-compliant.
  • the technical problem which the invention aims to solve is therefore to obtain a pixelated light beam which can be combined with a portion of a second light beam so as to produce a main lighting beam integrating an adaptive function, such as ADB , DBL, while forming a main lighting beam where the risks of light overcurrent in certain areas are reduced, in particular which complies with regulations.
  • an adaptive function such as ADB , DBL
  • a first object of the invention is a light module of a motor vehicle intended to generate a light beam projecting an image forward.
  • the image includes at least one horizontal row of illumination units.
  • the light module is arranged so that a first illumination unit of a first horizontal row of illumination units includes a lower and / or upper end which is vertically offset from a respectively lower and / or upper end of a second illumination unit in the same row. And, the first horizontal row of illumination units forms an upper portion of a passing beam.
  • the offset can be applied to several lighting units in the row.
  • one or more illumination units can be placed in offset with the other units.
  • the illumination units of the row of illumination units forming an upper portion of a passing beam are partly plumb with a horizontal cut line and partly offset with respect to this horizontal line.
  • the module in such a way that the offset unit or units of illumination are those capable of being overlapped with certain regulated zones before being offset.
  • Such an arrangement goes against what is commonly applied and the prejudice of wanting to exactly align light strips and / or the lighting units in a row.
  • the offset illumination units are units that would cross the BRR segment if the row contained only aligned units.
  • the final main lighting beam therefore meets the conditions imposed by the regulations.
  • the invention also relates to a lighting device comprising a light module according to the invention.
  • the terms “front”, “rear”, “lower”, “upper”, “top”, “bottom” “side”, “transverse”, “right”, “left” refer to the meaning of light emission outside the corresponding light module.
  • the terms “upstream” and “downstream” refer to the direction of propagation of light in the object which quotes them.
  • the light module 1 capable of generating a light beam.
  • the light module 1 emits the light beam longitudinally from rear to front, as illustrated by the arrow L on the figure 1 .
  • Said beam projects forward an image composed of a plurality of lighting zones, also called illumination units, here, in rectangular shape and arranged in at least one horizontal row.
  • the light beam generated by the light module 1 is, for example, lit in addition to a main lighting beam, such as a code beam or a driving beam, to form a directional dipped beam, also called “Bending Light ”, or an adaptive high beam, also called“ Adaptive Driving Beam ”.
  • a main lighting beam such as a code beam or a driving beam
  • a directional dipped beam also called “Bending Light ”
  • an adaptive high beam also called“ Adaptive Driving Beam ”.
  • the light module 1 illustrated on the figure 1 includes light emitting means 10, a projection assembly 30 placed at the front of said transmission means 10 and an optical element 20 disposed between these two elements.
  • the light emission means 10 are composed of a printed circuit board 11, also called “printed circuits board” or “PCB” in English, and of a plurality of light sources 14 which are here light-emitting diodes. 14, or commonly called LED for short in English.
  • the light-emitting diodes 14 are arranged in two transverse rows including a first row 15 and a second row 16. Said rows are perpendicular to the direction of propagation of the light of the light module 1. Each row 15 or 16 comprises ten separate light emitting diodes 14 as shown in the figure 2 .
  • three of the ten light-emitting diodes of the first row are not aligned with other diodes in the same row.
  • the three non-aligned light-emitting diodes 150, 151 and 152 are those located to the right of the figure 2 . The reason for their offset from the other diodes will be explained later in the description.
  • the assembly of the two rows 15, 16 of light-emitting diodes 14 constitutes a matrix 12 of light sources.
  • Said matrix 12 is mounted on a front face 17 of the printed circuit board 11.
  • the printed circuit board 11 is mounted on a radiator, the cooling fins 13 of which are installed on a rear face 18 of said card 11.
  • the radiator and the printed circuit board 11 form the support for the matrix 12 of light sources.
  • the optical element 20 comprises an output diopter 35, a full front portion 350 disposed upstream of the output diopter 35, and a plurality of guides substantially parallel and distinct from each other.
  • the guides extend longitudinally rearward from the front portion 350, and in particular have an identical length.
  • some guides may be longer than others.
  • the outer guides may be longer than the guides in the center.
  • the optical element 20 comprises two rows of light guides including a top row 21 and a bottom row 22.
  • Each row 21 or 22 brings together ten light guides.
  • the number of light guides per row corresponds to the number of light-emitting diodes 14 per row 15, 16 of the matrix 12 of light sources.
  • the light guides in the top row 21 are numbered, in order from left to right on the figure 3 , from 210 to 219 while the light guides in the bottom row are numbered from 220 to 229 in the same order.
  • the light guides in the same row have the same height.
  • the guides at the end of each row are wider than the other guides in the same row.
  • the guides of the bottom row 22 have an elongated section in the vertical direction V.
  • the section obtained from each bottom guide is longer than it is wide.
  • the height dimension of the guides of the bottom row 22 is greater than that of the top row 21.
  • the guides of the top row 21 with the exception of the guides at the ends 210 and 219, they have a substantially rectangular section, possibly square.
  • all the guides each include an inlet face and an outlet.
  • the entry faces of the light guides are visible on the figure 3 and in the example illustrated, these are input diopters.
  • the entry faces of the light guides are arranged in a first plane S1 which is here parallel to the plane of the printed circuit board 11.
  • each entry face is placed opposite a corresponding light-emitting diode 14 so that the major part of the light rays emitted by said diode 14 enters the corresponding light guide.
  • the entry faces of the top row 21 are placed opposite the light-emitting diodes 14 of the first row 15.
  • the entry faces of the bottom row 22 are placed opposite the light-emitting diodes 14 of the second row 16.
  • the entry faces of the light guides in the top row 21 are numbered, in order from left to right on the figure 3 , from 230 to 239 while the entry faces of the light guides in the bottom row 22 are numbered from 240 to 249 in the same order.
  • three light guides 210, 211 and 212 of the top row 21, considered from the left of the figure 3 are not aligned with the other guides in the same row.
  • Said three guides 210, 211 and 212 are hereinafter called the offset guides while the other guides are called the non-offset guides.
  • the offset of the light guides means that the entry faces 230, 231 and 232 of the three offset guides 210, 211 and 212 are placed higher than the entry faces 233 to 239 of the non-offset guides from 213 to 219 .
  • the heights of the entry faces 230, 231 and 232 of the offset guides 230, 231 and 232 remain identical to the other guides.
  • the first guide 230 offset counted from the left of the figure 3 , which is also the guide located at the end of the top row 21, comprises a first entry face 230 which has the same height as the tenth entry face 239 situated at the opposite end of the top row 21.
  • the second and third offset guides 211 and 212 comprise the input faces of the same size as those of the non-offset guides, of course, with the exception of the non-offset guide located at the right end of the row at the top 21 .
  • the associated light guides 210, 211 and 212 are positioned higher than the other guides. In other words, the guides 210, 211 and 212 are offset in an upward vertical translation.
  • the optical element 20 is placed in front of the matrix 12 of light sources so that the entry face of each light guide is positioned opposite an associated elementary light source 14 and so that the light beam emitted by each source elementary light 14 is propagated in the associated light guide by entering by the entry face and leaving by the exit.
  • the input faces 230, 231 and 232 of the offset guides 210, 211 and 212 are placed opposite the non-aligned light-emitting diodes 150, 151 and 152 of the first row 15 of light-emitting diodes.
  • the input faces 230, 231 and 232 are facing each other of said non-aligned diodes so that the main axis of light emission of these diodes crosses the symmetrical center of these input faces.
  • the input faces 230, 231 and 232 capture the majority of the light rays emitted by the diodes 150, 151 and 152 for better optical efficiency.
  • the outputs of the light guides form secondary light sources 34.
  • the latter are imaged by the projection optics 30 to form a light beam.
  • the light-emitting diodes 14 carried by the printed circuit board are also called the primary light sources 14.
  • the cutting plane 4-4 at the figure 1 is placed so as to show all the light guides in the top row 21 and all the light-emitting diodes in the first row 15 on the figure 4 .
  • the light guide outputs of the top row 21 are numbered, in order from bottom to top of the figure 4 , from 330 to 339.
  • the outputs of the offset light guides 230, 231 and 232 are numbered 330, 331 and 332 respectively.
  • the outputs of the light guides are also placed in a second plane parallel S2 to the plane of the printed circuit board.
  • the projection optics 30 and the light guides 210 to 219, 220 to 229 are arranged so that all the outputs of the light guides are coplanar with the focal plane P of l projection assembly 30.
  • the second plane S2 where all the outputs 330 to 339 of the light guides 210 to 219 and 220 to 229 are located is coincident with the focal plane P of the projection optics 30.
  • the image of the secondary light sources 34 is projected forward clearly and has a homogeneous light distribution.
  • the offset of the outputs 330, 331 and 332 is not visible in the figures, it is understood that, given the offset position of the three guides 210, 211 and 212, the corresponding outputs 330, 331 and 332 of these guides are also offset vertically up relative to the other outputs in the same row.
  • the light guides can be designed so that only the outputs are offset and not the input faces of the light guides.
  • the projection assembly 30 comprises a secondary optic 32 disposed at the front of the light guides 210 to 219, and 220 to 229 and a primary optic 31 disposed between the secondary optics 32 and outputs 330 to 339.
  • the optical element 20 includes not only the light guides 210 to 219, 220 to 229 but also the primary optics 31.
  • the primary optics 31 is placed in front of the outputs 330 to 339 of the light guides.
  • the primary optic 31 is formed by the output diopter 35 of the optical element 20.
  • the primary optics 31 and the light guides 210 to 219, 220 to 229 can be produced in a single piece, as in the example illustrated.
  • the optical element 20, as described, can be made of silicone. It can also be made of glass or thermoformable plastic.
  • the optical coupling between the primary optics 31 and the secondary optics 32 is carried out so as to form a converging system at the level of the focal plane P, which coincides with the second plane S2 where all the outputs 330 to 339 of the guides are located. from light.
  • a field correction lens can be interposed between the primary optic 31 and the secondary optic 32 so that the focal surface P of the projection assembly is perfectly coplanar with the second plane S2, by example when it is difficult to achieve with only the primary optics 31 and the secondary optics 32.
  • the projection assembly 30 composed of the primary and secondary optics 32, images the secondary light sources 34.
  • the light module 1 described above can be used in conjunction with a second light module intended to generate a main portion of the light beam.
  • the second light module generates a lower part B1 of the passing beam while the light module 1 generates a light beam forming an upper part H1 of the passing beam and an additional adaptive driving beam.
  • the final image I is projected onto the screen in an orthogonal coordinate system R composed on the ordinate of a vertical axis V and on the abscissa of a horizontal axis H.
  • the vertical axis V corresponds to a vertical axis above the road and the horizontal axis H symbolizes the horizon.
  • the final image I is composed of an image I1 of the secondary light sources and of an image I2 of the lower part B1 of the passing beam.
  • the image I1 of the secondary light sources 34 is reversed in this example embodiment of the light module. Indeed, the light beams from the top row 21 of light guides are projected downward while those of the bottom row 22 of light guides are projected upward.
  • Each secondary elementary light source 34 illuminates an area of the screen.
  • each of the zones Z1 to Z10 and W1 to W10 therefore corresponds to the outputs of the light guides of the optical element 20.
  • the areas on the screen Z1 to Z10 as well as W1 to W10 are also called the illumination units, or "pixel" in English.
  • the illumination units Z1 to Z10 and W1 to W10 on the screen are arranged in two horizontal rows, including an upper row 4 and a lower row 5.In order to facilitate reading, the illumination units are called in shortcut " units ".
  • the upper row 4 of units forms a distribution of a complementary route beam. It contains the units Z1 to Z10 which correspond respectively to the outputs of the bottom row 22 of the optical element 20, therefore to the light sources of the second row 16.
  • the unit Z1 corresponds to the projected image of the output of the light guide 229 located at the right end of the bottom row 22 on the figure 3 .
  • the unit Z2 corresponds to the output 248 of the light guide 228 located to the left of the guide 229 at the right end.
  • the unit Z3 corresponds to the output 247 of the guide 227 located to the left of the guide 228 and so on to the unit Z10.
  • the unit Z10 corresponds to the output 240 of the light guide 220 which is located on the far left of the bottom row 22 on the figure 3 .
  • each of these units is delimited by peripheral edges of the output of the associated light guide.
  • the units Z1 to Z10 of the upper row 4 have a shape identical to that of the outputs 240 to 249 of the bottom row 22.
  • the units Z1 to Z10 are rectangles whose height is greater than the width.
  • zones Z1 and Z10 are wider than zones Z2 to Z9.
  • the lower row 5 of units forms an upper portion of a passing beam. In this example, it forms a dynamic turn distribution.
  • the correspondence between the units W1 to W10 and the outputs of the top row 21 is done in a similar manner as the units Z1 to Z10 with the bottom row 22.
  • the last three units W8 to W10 respectively correspond to the projected images of the outputs 330, 331 and 332 of the three offset guides 210, 211 and 212 described above.
  • the three units W8 to W10 are shifted vertically downward relative to the other units W1 to W7 in the same row.
  • the offset of the three units W8 to W10 is limited according to the vertical in order to maintain a rectilinear lighting at the level of the side of the road. For example, for optimal lighting of the aisle, this offset is only 1 ° down, here 1 ° under the BRR segment.
  • the upper edge 51 and the lower edge 52 of the unit in question are offset vertically downward with respect respectively to the upper edge 53 and to the lower edge 54 of the non-offset units W1 to W7.
  • each primary elementary light source 14 here each light-emitting diode 14
  • the arrangement of the illumination units is carried out so that the photometric distribution respects the conditions imposed by the UNECE R123 regulation.
  • the three units W8 to W10 offset are located below the BRR segment which is at 0.57 ° U and between 8 ° R and 20 ° R.
  • these three offset units W8 to W10 are lit, they do not impact the light intensity of the BRR segment. Consequently, the light intensity measured at the BRR segment is not likely to exceed the value of 3550 cd as required by the regulations.
  • the light-emitting diodes 14 are adjusted so that the units Z1 to Z10 of the upper row 4 are switched off.
  • the units W1 to W10 of the lower row 5 can be selectively lit with the lower part B1 of the passing beam to produce an adaptive final passing beam integrating the DBL function, otherwise called adaptive turning function.
  • the units W1 to W5 When a vehicle is traveling in a straight line, the units W1 to W5, mainly located to the left of the vertical axis V, are switched off while the units W6 to W10, located to the right of the vertical axis V, are switched on so forming a high cutoff line of the passing beam. Since the zones W8 to W10 are offset, the light intensity at the level of the BRR segment complies with the regulations in force.
  • the W8 to W10 units, or even including the W7 unit are gradually lit from left to right, until the end of the turn, here the W10 unit located at the far right of the row when the turn is very pronounced.
  • the units W1 to W5 located to the left of the vertical axis V, are progressively lit from right to left, that is to say from unit W5 towards unit W1, or even up to '' to unit W1 when the turn is very pronounced, which allows better lighting on the driver's left side.
  • the light module 1 of the light system generates an adaptive passing beam bringing better visibility to the lighting during the turns while respecting the conditions imposed by the regulations.
  • the light-emitting diodes 14 are adjusted so that all the units Z1 to Z10 and W1 to W10 are lit, in particular when there is no vehicle traveling opposite.
  • the light-emitting diodes 14 are controlled so as to create a shadow zone at the location where the detected user is located. For example, to do this, the units W3, W4 of the lower row 5 of units and the units Z3 and Z4 of the upper row 4 of units are switched off.
  • the units Z1 to Z10 then form an adaptive complementary route beam. They are lit to form a light beam located above the dynamic turning beam formed by the units W1 to W10, itself located above a lower part B1 of a passing beam.
  • the principle of shifting a few units in a row of units can be applied to the upper row 4 of units illustrated in the figure 5 .
  • the guide or guides, participating in generating the unit or units offset in this upper row 4 comprise the outlet offset vertically downwards with respect to the other outlets of the other guides.
  • the guides to be shifted upwards are part of the guides 220 to 229 in the bottom row 22 of the optical element 20.
  • the light system as well as the light module according to the invention can be configured so as to generate a light beam which complies with other regulations, for example the federal standards for the safety of motor vehicles of the United States. , also called the "FMVSS” standards for "Federal Motor Vehicle Safety Standard” in English.
  • FMVSS Federal Motor Vehicle Safety Standard
  • the glare of oncoming vehicle drivers is measured and linked to the thresholds established from FMVSS 108.
  • the light beam can be a passing beam is in a configuration called according to this standard "VOR beam pattern" for left-hand drive .
  • the final image I3 is represented in a frame R identical to the frame presented in the figure 5 .
  • the passing beam is composed of a lower part B2 of the passing beam and an upper part H2 of the passing beam.
  • the upper part of the passing beam is generated by a light module produced according to a second embodiment of the invention while the lower part B2 of the passing beam is generated by a second light module known to those skilled in the art.
  • Image I4 of the upper dipped beam part comprises a single row 6 of eight illumination units X1 to X8, the arrangement of which is carried out so that the photometric distribution meets the conditions imposed on a passing beam according to the regulations of the United States.
  • two units X5 and X6 are vertically offset downward relative to the other units in order to comply with a condition of standard FMVSS 108 according to the last version in force on July 2018.
  • the two offset units X5 and X6 are the ones that would be expected to cross the line between 1 ° R and 3 ° R and 0 ° U if the illumination units were all aligned.
  • the two units X5 and X6 are shifted vertically downwards so that the upper ends 61 of said units X5 and X6 are in superposition with the line situated between 1 ° R and 3 ° R and at 0 ° U. In this way, there is no light above the horizon between 1 ° R and 3 ° R.
  • the light module carrying the optical part participating in generating the image I3 therefore complies with the FMVSS 108 standard.
  • such a light module is likely to get a good score during a safety assessment carried out by the United States Institute of Road Safety Insurers, or "Insurance Institute for Highway Safety" (IIHS) in English. Indeed, apart from the offset units X5 and X6, the other non-offset units X1 to X4, X7 and X8 overlap the horizontal axis H at 0 ° U. Thus, when these non-offset units are illuminated, the range of the light beam is improved outside the zones where there is a risk of dazzling and where the FMVSS 108 standard recommends not to illuminate above the horizon.
  • IIHS Industry Institute for Highway Safety
  • the light module according to the invention offers good visibility while respecting the regulations in order to avoid the glare of a conductor coming opposite.
  • an optical element is therefore used as in the previous embodiment.
  • the optical element is adapted so as to comprise a single row of light guides composed of eight separate guides.
  • an upper row 7 of illumination units Y1 to Y8 shown in dotted lines is located above the row 6 of illumination units X1 to X8. This upper row 7 of lighting units Y1 to Y8 makes it possible to form an adaptive complementary route beam.
  • optical element is therefore used as in the previous embodiment.
  • the optical element can be adapted so as to include the number of desired guides to form the number of desired illumination units in each of the rows.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP19188789.2A 2018-07-30 2019-07-29 Leuchtmodul eines kraftfahrzeugs, das in der lage ist, einen lichtstrahl mit mindestens einer reihe von leuchteinheiten zu erzeugen Active EP3611425B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1857088A FR3084440B1 (fr) 2018-07-30 2018-07-30 Module lumineux de vehicule automobile apte a generer un faisceau lumineux avec au moins une rangee d'unites d'illumination

Publications (2)

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EP3611425A1 true EP3611425A1 (de) 2020-02-19
EP3611425B1 EP3611425B1 (de) 2024-03-06

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EP19188789.2A Active EP3611425B1 (de) 2018-07-30 2019-07-29 Leuchtmodul eines kraftfahrzeugs, das in der lage ist, einen lichtstrahl mit mindestens einer reihe von leuchteinheiten zu erzeugen

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US (1) US10845017B2 (de)
EP (1) EP3611425B1 (de)
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FR (1) FR3084440B1 (de)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
FR3115584A1 (fr) * 2020-10-23 2022-04-29 Psa Automobiles Sa Module d’eclairage a illumination de lentille
EP4303482A1 (de) * 2022-07-07 2024-01-10 ZKW Group GmbH Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer mit nebeneinander angeordneten beleuchtungseinheiten

Families Citing this family (3)

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FR3087875B1 (fr) * 2018-10-25 2021-07-30 Valeo Vision Module lumineux pour dispositif d'eclairage de vehicule
EP3875838B1 (de) * 2020-03-06 2023-09-20 Lumileds Holding B.V. Beleuchtungsvorrichtung mit lichtleiter
CN115698585A (zh) * 2020-06-03 2023-02-03 海拉有限双合股份公司 用于机动车的头灯

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WO2018024349A1 (en) * 2016-08-03 2018-02-08 HELLA GmbH & Co. KGaA Optical system comprising a light guide element and a joined body being materially connected to the light guide element
EP3301347A1 (de) * 2016-09-29 2018-04-04 Valeo Vision Beleuchtungsvorrichtung für kraftfahrzeug, die einen lichtwellenleiter umfasst

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JP6839648B2 (ja) * 2014-07-15 2021-03-10 ルミレッズ ホールディング ベーフェー 車両照明モジュール
FR3061965B1 (fr) * 2017-01-19 2022-08-12 Valeo Vision Dispositif de projection d’un faisceau lumineux pixelise, projecteur muni d’un tel dispositif

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US20080198574A1 (en) * 2007-02-21 2008-08-21 Magna International Inc. LED apparatus for world homologation
US20090016074A1 (en) * 2007-07-09 2009-01-15 Magna International Inc. Semiconductor light engine using glass light pipes
DE102013200442B3 (de) * 2013-01-15 2014-02-13 Automotive Lighting Reutlingen Gmbh Lichtmodul für einen Kraftfahrzeugscheinwerfer, der zur Erzeugung streifenförmiger Lichtverteilungen eingerichtet ist
US20160040848A1 (en) * 2014-08-11 2016-02-11 Koito Manufacturing Co., Ltd. Vehicle lamp
WO2018024349A1 (en) * 2016-08-03 2018-02-08 HELLA GmbH & Co. KGaA Optical system comprising a light guide element and a joined body being materially connected to the light guide element
EP3301347A1 (de) * 2016-09-29 2018-04-04 Valeo Vision Beleuchtungsvorrichtung für kraftfahrzeug, die einen lichtwellenleiter umfasst

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Publication number Priority date Publication date Assignee Title
FR3115584A1 (fr) * 2020-10-23 2022-04-29 Psa Automobiles Sa Module d’eclairage a illumination de lentille
EP4303482A1 (de) * 2022-07-07 2024-01-10 ZKW Group GmbH Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer mit nebeneinander angeordneten beleuchtungseinheiten

Also Published As

Publication number Publication date
CN110778983B (zh) 2024-02-20
US10845017B2 (en) 2020-11-24
FR3084440A1 (fr) 2020-01-31
EP3611425B1 (de) 2024-03-06
CN110778983A (zh) 2020-02-11
US20200032973A1 (en) 2020-01-30
FR3084440B1 (fr) 2021-01-15

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