EP3611425B1 - 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
EP3611425B1
EP3611425B1 EP19188789.2A EP19188789A EP3611425B1 EP 3611425 B1 EP3611425 B1 EP 3611425B1 EP 19188789 A EP19188789 A EP 19188789A EP 3611425 B1 EP3611425 B1 EP 3611425B1
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EP
European Patent Office
Prior art keywords
light
row
pixel
luminous module
guides
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Active
Application number
EP19188789.2A
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English (en)
French (fr)
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EP3611425A1 (de
Inventor
Pierre Renaud
Alexandre Joerg
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Valeo Vision SAS
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Valeo Vision SAS
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141Light emitting diodes [LED]
    • F21S41/143Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141Light emitting diodes [LED]
    • F21S41/151Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24Light guides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25Projection lenses
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25Projection lenses
    • F21S41/255Lenses with a front view of circular or truncated circular outline
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32Optical layout thereof
    • F21S41/322Optical layout thereof the reflector using total internal reflection
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13Signalling 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
    • F21S43/14Light emitting diodes [LED]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20Signalling 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20Signalling 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
    • F21S43/235Light guides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40Cooling of lighting devices
    • F21S45/47Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F21S45/48Passive 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10Arrangement or contour of the emitted light
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10Arrangement or contour of the emitted light
    • F21W2102/13Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135Arrangement 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
    • F21W2102/14Arrangement 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Definitions

  • the invention relates to a motor vehicle lighting 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 “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 off or on state of the corresponding illumination unit is controlled.
  • the beam is then made up of a plurality of illumination units, turned on or off depending on the presence of other vehicles in the emission zone.
  • US2008198574A1 shows such a light system.
  • the light module capable of generating such a light beam is often used in addition to a light module producing a portion of the driving beam in front lighting devices to achieve an adaptive lighting function, also called "Adaptive Driving Beam » or ADB in English.
  • a lower portion which can come from another module, illuminates below the horizon and the lit illumination units complete the lighting above this lower 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 shadow zone where there is another vehicle being followed or coming in the opposite direction. Consequently, the risk of dazzling the driver is reduced. from the other vehicle while maintaining good visibility of the road thanks to the lighting units not being turned 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 code beam, or a lower portion of the passing beam.
  • the pixelated light beam can form a dynamic bend distribution in order to achieve a dynamic bending function, or also called “dynamic bending light” or DBL in English, allowing the light beam to follow the curvature of the bends followed by the vehicle.
  • the aforementioned ADB or DBL functions are lighting functions which improve the quality and comfort of visibility of the lighting device. There is therefore an increasing development of lighting devices integrating these functions.
  • the photometry of a regulatory passing beam must include zones whose light intensity complies with the values imposed by the 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 superimposes with the BRR segment of the beam of basic crossing.
  • the illumination unit provides additional light intensity to the area of the BRR segment. This risks causing the light intensity of the BRR segment to exceed the regulatory value and therefore making the lighting device non-compliant.
  • the technical problem that 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 overintensity are reduced in certain areas, in particular which complies with regulations.
  • an adaptive function such as ADB , DBL
  • a first object of the invention is a light module for 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 comprises a lower and/or upper end which is offset vertically relative to a respectively lower and/or upper end of a second illumination unit of the same row. And, the first horizontal row of illumination units forms a high portion of a low beam.
  • the offset can be applied to multiple illumination units in the row.
  • one or more illumination units can be placed offset from the other units.
  • the illumination units of the row of illumination units forming an upper portion of a passing beam are partly vertical to a horizontal cut-off line and partly offset relative to this horizontal line.
  • the module can thus be arranged in such a way that the offset illumination unit(s) are those likely to overlap with certain regulated zones before being shifted. Such an arrangement goes against what is commonly applied and the prejudice of wanting to exactly align light strips and/or illumination units in a row.
  • the offset illumination units are units that would intersect the BRR segment if the row contained only aligned units.
  • the final main lighting beam therefore complies with 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 direction of emission of light out of the corresponding light module.
  • the terms “upstream” and “downstream” refer to the direction of propagation of light in the object that cites them.
  • the light module 1 capable of generating a light beam.
  • the light module 1 emits the light beam longitudinally from the rear to the 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 units illumination, 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 high beam, to form a directional low 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 high beam
  • Adaptive Driving Beam an adaptive high beam
  • the light module 1 illustrated on the figure 1 comprises light emitting means 10, a projection assembly 30 placed in front of said emitting means 10 and an optical element 20 disposed between these two elements.
  • the light emitting means 10 are composed of a printed circuit board 11, also called a “printed circuit board” or “PCB” in English, and 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 distinct light-emitting diodes 14 as illustrated in figure 2 .
  • 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 compared to the other diodes will be explained later in the description.
  • the set of 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 whose cooling fins 13 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 solid 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 towards the rear 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 center guides.
  • 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 top row light guides 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 220 to 229 in the same order.
  • the light guides in the same row have the same height.
  • the guides located at the end of each row are wider than the other guides in the same row.
  • the guides of the bottom row 22 have a section elongated in the vertical direction V.
  • the section obtained from each bottom guide is longer than 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 entry face and an exit.
  • the entrance faces of the light guides are visible on the Figure 3 and in the example shown, 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 majority of the light rays emitted by said diode 14 enter the corresponding light guide.
  • the input faces of the top row 21 are placed opposite the light-emitting diodes 14 of the first row 15.
  • the input faces of the bottom row 22 are placed opposite the light-emitting diodes 14 of the second row 16.
  • the entrance faces of the light guides of the top row 21 are numbered, in order from left to right on the Figure 3 , from 230 to 239 while the entrance faces of the light guides of 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 causes the entry faces 230, 231 and 232 of the three offset guides 210, 211 and 212 to be placed higher than the entry faces 233 to 239 of the non-offset guides 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 located at the opposite end of the top row 21.
  • the second and third offset guides 211 and 212 include entry 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 relative to the other guides.
  • the guides 210, 211 and 212 are offset in a vertical translation upwards.
  • the optical element 20 is placed in front of the matrix 12 of light sources so that the entrance 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 through the entry face and leaving through the exit.
  • the entry 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 face to face 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 In order to distinguish the light-emitting diodes 14 from the secondary light sources 34 consisting of the outputs of the light guides, the light-emitting diodes 14 carried by the printed circuit board are also called the primary light sources 14.
  • the outputs of the light guides 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 S2 parallel 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 the 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 coincides 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 outlets 330, 331 and 332 is not visible in the figures, it can be understood that given the offset position of the three guides 210, 211 and 212, the corresponding outlets 330, 331 and 332 of these guides are also offset vertically. upwards compared to other outlets in the same row.
  • the light guides can be designed so that only the exits are offset and not the entry 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 exits 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 optics 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 made in a single monobloc part, 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 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 optics 31 and the secondary optics 32 so that the focal surface P of the projection assembly is perfectly coplanar with the second plane S2, for example. example when it is difficult to achieve with only the primary optics 31 and the secondary optics 32.
  • the projection assembly 30 composed of 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 lighting 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 adaptive complementary main beam.
  • the final image I is projected on the screen in an orthogonal reference frame 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 an image I2 of the lower part B1 of the passing beam.
  • the image I1 of the secondary light sources 34 is inverted in this embodiment of the light module. Indeed, the light beams coming from the top row 21 of light guides are projected downwards while those from the bottom row 22 of light guides are projected upwards.
  • 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 “pixels” 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 shorthandly called " units”.
  • the upper row 4 of units forms a distribution of a complementary driving beam. It contains the units Z1 to Z10 which respectively correspond 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 .
  • Unit Z2 corresponds to output 248 of light guide 228 located to the left of guide 229 at the right end.
  • Unit Z3 corresponds to output 247 of guide 227 located to the left of guide 228 and so on up to unit Z10.
  • Unit Z10 corresponds to output 240 of light guide 220 which is located to the far left of 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 shape of the entrance face remains similar to that of the exit.
  • the units Z1 to Z10 of the upper row 4 have a shape identical to that of the outlets 240 to 249 of the lower 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 a high portion of a passing beam. In this example, it forms a dynamic turn distribution.
  • the correspondence between units W1 to W10 and the Outputs from the top row 21 are done in a similar manner to the units Z1 to Z10 with the bottom row 22.
  • the last three units W8 to W10 correspond respectively 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 offset vertically downwards relative to the other units W1 to W7 in the same row.
  • the offset of the three units W8 to W10 is limited vertically in order to maintain rectilinear lighting at the level of the shoulder of the road. According to an example outside the scope of the invention, for optimal lighting of the aisle this offset is only 1° downwards, here 1° under the BRR segment.
  • the upper edge 51 and the lower edge 52 of the unit considered are offset vertically downwards relative respectively to the upper edge 53 and 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 complies with the conditions imposed by the UNECE R123 regulation.
  • the three offset units W8 to W10 are 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 illuminated, 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 regulations.
  • the light emitting diodes 14 are adjusted so that the units Z1 to Z10 of the upper row 4 are turned off.
  • the units W1 to W10 of the lower row 5 can be selectively illuminated with the lower part B1 of the passing beam to produce an adaptive final passing beam integrating the BL function, otherwise called adaptive turning function.
  • units W1 to W5 When a vehicle is driving in a straight line, units W1 to W5, mainly located to the left of the vertical axis V, are turned off while units W6 to W10, located to the right of the vertical axis V, are turned on so to form a high cut-off line of the passing beam. Since zones W8 to W10 are staggered, the light intensity at the BRR segment complies with current regulations.
  • units W8 to W10 are lit progressively from left to right, until the end of the turn, here unit W10 located on the far right of the row when the bend is very pronounced.
  • units W1 to W5 located to the left of the vertical axis V, are lit progressively from right to left, that is to say from unit W5 towards unit W1, or even up to 'to the W1 unit when the turn is very sharp, which allows better lighting on the driver's left side.
  • the light module 1 of the lighting system generates an adaptive passing beam providing 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 on, in particular when there is no vehicle traveling in front.
  • 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, units W3, W4 of the lower row 5 of units and units Z3 and Z4 of the upper row 4 of units are turned off.
  • the units Z1 to Z10 then form an adaptive complementary main beam. They are lit to form a light beam located above the dynamic cornering 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 figure 5 .
  • At least one of the units Z1 to Z10 of the upper row 4 can be shifted. units vertically upwards.
  • the guide(s), participating in generating the offset unit(s) in this upper row 4 include the output offset vertically downwards relative to the other outputs of the other guides.
  • the guides to be shifted upwards are part of the guides 220 to 229 of 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 conforms to other regulations, for example the federal motor vehicle safety standards 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 drivers of oncoming vehicles is measured and linked to thresholds established from the FMVSS 108 standard.
  • a final image I3 of a light beam which can be adapted to the FMVSS 108 standard.
  • the light beam can be a passing beam and is in a configuration called according to this standard “VOR beam pattern” for left-hand driving .
  • the final image I3 is represented in a reference R identical to the reference presented in Figure 5 .
  • the passing beam is composed of a lower passing beam part B2 and an upper passing beam part H2.
  • the upper part of the low beam is generated by a light module produced according to a second embodiment of the invention while the lower part B2 of the low beam is generated by a second light module known to those skilled in the art.
  • the image I4 of the upper part of the passing beam comprises a single row 6 of eight illumination units X1 to UNITED STATES.
  • the two units X5 and X6 are offset vertically downwards so that the upper ends 61 of said units X5 and °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 I3 image therefore complies with the FMVSS 108 standard.
  • such a light module has a good chance of obtaining a good rating in a safety evaluation carried out by the Insurance Institute for Highway Safety (IIHS). in English. Indeed, apart from the shifted units X5 and X6, the other non-shifted 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 areas where there is a risk of glare and where the FMVSS 108 standard recommends not lighting above the horizon.
  • IIHS Insurance Institute for Highway Safety
  • the light module according to the invention offers good visibility while respecting the regulations to avoid the dazzling of a driver coming in front.
  • the optical element is adapted to have 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 illumination units Y1 to Y8 makes it possible to form an adaptive complementary driving beam.
  • the optical element can be adapted to include the desired number of guides to form the desired number of 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)

Claims (14)

  1. Lichtmodul (1) für ein Kraftfahrzeug, das dazu bestimmt ist, einen Lichtstrahl zu erzeugen, der nach vorne hin ein Bild (I1; I4) projiziert; wobei das Bild (I1; I4) mindestens eine horizontale Reihe (4, 5; 6) von Beleuchtungseinheiten (Z1 bis Z10, W1 bis W10; X1 bis X6) umfasst;
    wobei das Lichtmodul (1) so gestaltet ist, dass eine erste Beleuchtungseinheit (W8, W9, W10; X5, X6) einer ersten horizontalen Reihe (5; 6) von Beleuchtungseinheiten ein unteres (52) und/oder oberes (51) Ende umfasst, das in Bezug auf ein jeweiliges unteres (54) und/oder oberes (53) Ende einer zweiten Beleuchtungseinheit (W1 bis W7; X1 bis X4, X7, X8) derselben Reihe (5; 6) vertikal versetzt ist,
    und so, dass die erste horizontale Reihe (5; 6) von Beleuchtungseinheiten (W1 bis W10; X1 bis X6) einen oberen Abschnitt eines Abblendlichtstrahls bildet,
    wobei das Lichtmodul dadurch gekennzeichnet ist, dass
    die erste Beleuchtungseinheit (W8, W9, W10) unterhalb einer bei 0,57°U liegenden horizontalen Linie liegt und eine bei 0°U liegende horizontale Linie überlappt und zwischen 8°R und 20°R liegt und die zweite Beleuchtungseinheit (W1 bis W7) die bei 0,57°U liegende horizontale Linie überlappt, oder dadurch, dass
    die erste Beleuchtungseinheit (X5, X6) ein oberes Ende (61) umfasst, das auf der gleichen Höhe wie oder unterhalb einer horizontalen Achse (H) bei 0°U und innerhalb des von 1°R bis 3°R reichenden Intervalls liegt, und die zweite Beleuchtungseinheit (X1 bis X4, X7, X8) die horizontale Achse (H) nur außerhalb des von 1°R bis 3°R reichenden Intervalls überlappt.
  2. Lichtmodul (1) nach Anspruch 1, dadurch gekennzeichnet, dass die erste Beleuchtungseinheit (W8, W9, W10; X5, X6) ein oberes Ende (51) umfasst, das in Bezug auf ein oberes Ende (53) der zweiten Beleuchtungseinheit (W1 bis W7; X1 bis X4, X7, X8) nach unten hin versetzt ist.
  3. Lichtmodul (1) nach Anspruch 2, dadurch gekennzeichnet, dass die erste Beleuchtungseinheit (W8, W9, W10; X5, X6) ein unteres Ende (52) umfasst, das in Bezug auf ein unteres Ende (54) der zweiten Beleuchtungseinheit (W1 bis W7; X1 bis X4, X7, X8) nach unten hin versetzt ist.
  4. Lichtmodul (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die erste Beleuchtungseinheit (W8, W9, W10; X5, X6) ein unteres Ende auf Höhe der zweiten Beleuchtungseinheit (W1 bis W7; X1 bis X4, X7, X8) aufweist.
  5. Lichtmodul (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Bild (I1, I4) mindestens eine zweite horizontale Reihe (4) von Beleuchtungseinheiten (Z1 bis Z10), obere horizontale Reihe genannt, umfasst, die oberhalb der ersten horizontalen Reihe (5, 6) von Beleuchtungseinheiten (W1 bis W10; X1 bis X6) angeordnet ist.
  6. Lichtmodul (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die obere horizontale Reihe (4) von Beleuchtungseinheiten (Z1 bis Z10) eine Verteilung eines adaptiven ergänzenden Fernlichtstrahls bildet.
  7. Lichtmodul (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Lichtmodul (1) umfasst:
    - mehrere primäre Lichtquellen (14);
    - ein optisches Element (20), das den primären Lichtquellen (14) nachgelagert angeordnet ist und eine Mehrzahl von Lichtleitern (210 bis 219, 220 bis 229) beinhaltet; wobei jeder Lichtleiter eine Eintrittsfläche (230 bis 239, 240 bis 249), die gegenüber einer zugeordneten primären Lichtquelle (14) angeordnet ist, und einen Austritt (330 bis 339) umfasst; wobei die Austritte (330 bis 339) der Lichtleiter (210 bis 219, 220 bis 229) sekundäre Lichtquellen (34) bilden;
    - eine Projektionsanordnung (30, 31, 32), die den Lichtleitern nachgelagert angeordnet ist, so dass das Bild der sekundären Lichtquellen (34) nach vorne projiziert wird.
  8. Lichtmodul (1) nach Anspruch 7, dadurch gekennzeichnet, dass das optische Element (20) und die Projektionsanordnung (30, 31, 32) so gestaltet sind, dass der Austritt (330 bis 339) jedes Lichtleiters (210 bis 219; 220 bis 229) komplanar zu einer Brennebene (P) der Projektionsanordnung (30) ist.
  9. Lichtmodul (1) nach Anspruch 7 oder nach Anspruch 8, dadurch gekennzeichnet, dass das optische Element (20) einen ersten Lichtleiter (210, 211, 212), der zur Erzeugung der ersten Beleuchtungseinheit (W8, W9, W10) beiträgt, und einen zweiten Lichtleiter (213 bis 219), der zur Erzeugung der zweiten Beleuchtungseinheit (W1 bis W7) beiträgt, umfasst, wobei der erste Leiter und der zweite Leiter jeweils einen Austritt, den ersten Austritt beziehungsweise den zweiten Austritt, umfassen, wobei der erste Austritt (330, 331, 332) einen unteren und/oder oberen Rand beinhaltet, der in Bezug auf einen jeweiligen unteren und/oder oberen Rand des zweiten Austritts (333 bis 339) vertikal versetzt ist.
  10. Lichtmodul (1) nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass die Projektionsanordnung (30) eine sekundäre Optik (32) umfasst, die vor dem optischen Element (20) angeordnet ist, und eine primäre Optik (31), die zwischen der sekundären Optik (32) und den sekundären Lichtquellen (34) angeordnet ist.
  11. Lichtmodul (1) nach Anspruch 10, dadurch gekennzeichnet, dass das optische Element (20) die primäre Optik (31) und die Lichtleiter (210 bis 219, 220 bis 229) umfasst, wobei die primäre Optik (31) und die Lichtleiter (210 bis 219, 220 bis 229) aus einem einzigen einstückigen Teil hergestellt sind.
  12. Beleuchtungsvorrichtung für ein Kraftfahrzeug, dadurch gekennzeichnet, dass sie ein Lichtmodul (1) nach einem der vorhergehenden Ansprüche umfasst.
  13. Beleuchtungsvorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass sie ein zweites Lichtmodul umfasst, das so gestaltet ist, dass ein Hauptabschnitt eines Beleuchtungsstrahls erzeugt wird, und dadurch, dass das Lichtmodul nach einem der Ansprüche 1 bis 11 so gestaltet ist, dass ein ergänzender Abschnitt zu dem Hauptabschnitt erzeugt wird, um einen Beleuchtungsstrahl zu bilden.
  14. Beleuchtungsvorrichtung nach Anspruch 13, dadurch gekennzeichnet, dass das zweite Lichtmodul einen unteren Teil (B1; B2) eines Abblendlichtstrahls erzeugt und dass das Lichtmodul (1) nach einem der Ansprüche 1 bis 11 so gestaltet ist, dass es einen Lichtstrahl erzeugt, der einen oberen Teil (H1; H2) eines Abblendlichtstrahls bildet, der ergänzend zu dem unteren Teil (B1; B2) des Abblendlichtstrahls eingeschaltet wird.
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)

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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

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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
EP4162195A1 (de) * 2020-06-03 2023-04-12 HELLA GmbH & Co. KGaA Scheinwerfer für ein kraftfahrzeug
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

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US7677777B2 (en) * 2007-02-21 2010-03-16 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
DE102013102835B4 (de) * 2013-03-20 2022-12-29 HELLA GmbH & Co. KGaA Beleuchtungsvorrichtung
EP3169547B1 (de) * 2014-07-15 2022-01-26 Lumileds LLC Fahrzeugbeleuchtungsmodul
JP6448250B2 (ja) * 2014-08-11 2019-01-09 株式会社小糸製作所 車両用灯具
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FR3056694B1 (fr) * 2016-09-29 2020-06-19 Valeo Vision Dispositif d'eclairage pour vehicule automobile comportant un guide de lumiere
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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FR3084440A1 (fr) 2020-01-31
FR3084440B1 (fr) 2021-01-15
CN110778983A (zh) 2020-02-11
US10845017B2 (en) 2020-11-24
US20200032973A1 (en) 2020-01-30
EP3611425A1 (de) 2020-02-19

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