Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
  • F21S41/24—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
  • F21S41/10—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
  • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
  • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
  • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
  • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
  • F21S41/141—Light emitting diodes [LED]
  • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
• • 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
  • F21S41/25—Projection lenses
• • 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
  • F21W2102/145—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 wherein the light is emitted between two parallel vertical cutoff lines, e.g. selectively emitted rectangular-shaped high beam
• • 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 light module of a motor vehicle.
• the invention relates to a light module comprising a plurality of light guides and capable of generating a pixelated light beam.
• light modules capable of generating a pixelated beam, the projection of which forms an image composed of illumination units, also called "pixels" in English.
• Said units are organized in at least one horizontal and / or vertical row and each of the illumination units can be activated selectively.
• Such a light module is used in addition to a second light module capable of generating a main lighting and signaling beam to form a lighting and signaling beam integrating one or more adaptive functions.
• the pixelated beam is illuminated with a portion of the road beam in order to perform an adaptive road function, called ADB, for "Adaptive Driving Beam".
• ADB adaptive road function
• This function makes it possible to form a beam with a shadow zone arranged at the level of a vehicle coming opposite and / or at the level of a vehicle being followed.
• the purpose of this function is to offer better visibility to the driver of the vehicle while avoiding dazzling the driver of the vehicle ahead and / or of the vehicle being followed.
• the light beam must include an area requiring strong lighting.
• the illumination thereof must respect a high value which is either imposed by regulations or fixed by automobile manufacturers.
• the required illumination value must be obtained at least at the level of a central segment of the beam.
• This central segment is in particular in the form of a light strip composed of at least one illumination unit.
• the light module generating the pixelated beam must produce at least one illumination unit constituting the central segment, called the central illumination unit, which has the desired illumination.
• the central illumination unit here is a high intensity illumination unit.
• the light module comprises a plurality of light guides arranged in a horizontal row.
• Each of these guides extends between an input diopter and an output.
• a guide is placed in the middle of the horizontal row and is called the central guide.
• the central guide participates in generating the central illumination unit.
• a powerful light source is placed in front of the central guide input diopter so that the central illumination unit has the desired illumination.
• the powerful light source can be a multi-chip light-emitting diode, in particular with three chips.
• a first object of the invention is a vehicle light module, comprising:
• each of said guides extending between an inlet diopter of this guide and an outlet, the adjacent light guides joining one another by a material junction;
• the light module comprises at least two guides, the distance between the focal surface and the junction of said two guides is greater than the distance between the focal surface and the junction of the other guides.
• the light guides there are at least two light guides which join upstream of the other guides and also upstream of the focal surface. These two light guides form a set, called a particular set.
• each of the guides of said particular assembly is therefore arranged at their junction with one another, the two guides joining therein in a single guide forming the terminal portion of said particular assembly.
• the downstream end of this terminal portion forms the outlet of said particular assembly.
• the particular set of two light guides includes two input diopters and a single output. Two separate light sources can therefore be placed respectively in front of the two input diopters of this set.
• the light rays of these two distinct light sources mix inside the particular assembly, precisely in the terminal portion of said assembly, and this upstream of the single outlet of said particular assembly.
• a luminous flux resulting at the exit of the particular assembly which is the sum of the luminous flux at the exit of each of the guides of the assembly.
• these two light sources can be chosen cleverly so that when the light flux is added at the output of each of the guides of the assembly, the resulting luminous flux is obtained, at the output of the assembly particular, which is equal to the luminous flux at the exit of the light guide of the state of the art.
• said state of the art light guide is the one that participates in generating a high intensity illumination unit.
• the two light sources can be light sources consuming less energy and having a lower lighting power than the only more powerful light source in the state of the art.
• the light sources cooperating with said particular assembly can be single-chip light-emitting diodes, while in the prior art, light-emitting diodes used for the maximum of a lighting beam, in particular a beam are generally tri-chip light emitting diodes.
• such light sources cost less than the only powerful light source in the state of the art, which makes it possible to reduce the cost of manufacturing the light module according to the invention.
• two of these sources cost less than one of the single source used in the state of the art.
• the less expensive components here less powerful light sources, can be used while keeping the same efficiency of the generated beam.
• the technical problem compared to the state of the art is resolved.
• the light guides are arranged in a horizontal row; and the two guides, the distance of which between their junction and the focal surface is greater than the distance between the focal surface and the junction of the other guides, are placed in the middle of said horizontal row, and are called central guides; a light module thus arranged can be used to generate at least a portion of the main beam which comprises the highly illuminated area requested;
• the light module is intended to generate a light beam along an optical axis, and in that the central guides are in equal number on either side of said optical axis; the light module, thus arranged, can generate at least one central illumination unit, symmetrical with respect to the optical axis of the module;
• central guides there are two central guides; according to a configuration of the light module, two central guides are sufficient to create a central illumination unit having the desired illumination; in addition, two central guides remain simple to produce;
• a single-chip light-emitting diode is placed in front of the input diopter of each central guide; the single-chip light-emitting diode costs less than a multi-chip light-emitting diode; it is therefore an economical alternative to the powerful light source;
• the single-chip light-emitting diodes are arranged on a printed circuit according to a surface mounting technology; the light-emitting diodes, produced using this technology, are soldered to the printed circuit; the latter can be connected to a radiator allowing the heat released by this circuit to be removed; in general, the light-emitting diodes soldered on the printed circuit cost less than when they are glued directly to the radiator;
• the angular spacing between the two central guides is an angle between 5 ° and 15 °; -
• the distance between the focal surface and the junction of the central guides, called the first distance dl, is greater than 0.5 mm; by way of example, the first distance di can be between 1.5 mm and 15 mm;
• the distance between the focal surface and the junction of the guides other than the central guides is between 1 mm and 4 mm;
• the light module comprises, for example, eight light guides
• the light module is capable of generating a pixelated light beam
• the at least two guides the distance between the focal surface and the junction of said two guides, is greater than the distance between the focal surface and the junction of the other guides are called secondary guides, the other guides being called primary guides, each guide primary forming a primary illumination unit in the bundle and the secondary guides together forming a single secondary illumination unit in the bundle, the illumination units being arranged adjacent to at least one row and capable of being selectively activated;
• the illumination units are light strips
• the secondary illumination unit is central; for example in the case of the preceding paragraph, the secondary illumination unit forms a central light strip;
• the secondary illumination unit has an intensity greater than the intensity of each primary illumination unit
• the light module is arranged so as to generate a light beam forming a portion of the high beam
• the projection system comprises a primary lens receiving the rays emerging from the outputs of the light guides and projecting them towards infinity;
• the part comprising the light guides and the primary lens came integrally in one single piece; thus, this makes it possible to reduce the number of distinct components of the light module and to simplify the mounting of said module.
• the invention also relates to a lighting device comprising a first light module arranged so as to generate a primary portion of the driving beam.
• Said device also comprises a light module according to the invention, called the second light module, arranged so as to generate a secondary portion of the road beam complementary to the primary portion generated by the first module.
• the terms “upstream” and “downstream” refer to the direction of light propagation in the object to which they refer and also to the direction of light emission outside said object.
• the vertical direction is represented by the axis V illustrated in FIGS. 1 to 4.
• the horizontal designates all orientations which belong to or which are parallel to a plane passing the axis L and the axis T illustrated in figures 1 to 4.
• FIG. 1 illustrates a top view of an exemplary embodiment of a light module according to the invention
• Figure 2 illustrates a side view of the light module according to Figure 1;
• FIG. 3 illustrates a rear view of a room having a plurality of light guides; said part is part of the light module of Figure 1;
• FIG. 5 illustrates the image generated by the light module of Figure 1; said image is in the form of isolux curves, projected on a vertical screen, in particular at a distance of 25 meters in front of the light module of FIG. 1.
• a light module 1 is intended to generate a light beam in the direction of an optical axis I.
• the light module 1 comprises a part 2 carrying a plurality of light guides 10 and a primary lens 6. The latter is placed at a distance and downstream from the part 2 so as to receive the light rays leaving said part 2.
• the part 2 carrying all the light guides is hereinafter called the part of guides 2.
• This part of guides 2 comprises a first portion 21 from which the light guides 10 extend longitudinally upstream.
• the first portion 21 comprises a first face 210 disposed facing the primary lens 6 and slightly curved in the direction of the distance from said primary lens 6. In other words, the first portion 21 of the part 2 is concave.
• the light guides 10 form a second portion 22 of the part 2. Said guides 10 are aligned so as to form a horizontal row 15 of guides. In addition, these light guides 10 are arranged in a fan shape. In fact, the light guides 10 extend here in a direction slightly inclined relative to the longitudinal direction L parallel to the optical axis I.
• the light guides 10 are eight in number and arranged on either side of the optical axis I.
• the first half 11 of the light guides 10 is located to the left of the axis optical I with respect to the direction of light emission. Said first half 11 of the light guides are inclined to the right.
• the second half 12 of the guides is located to the right of the optical axis I relative to the direction of light emission. Said second half 12 of the light guides are tilted to the left.
• the first half 11 and the second half 12 of the light guides are symmetrical in mirror with respect to the optical axis I.
• the respective axes of the light guides 10 converge at a fictitious common point.
• the terms “left” and “right” are defined with respect to the direction of propagation of the light inside the light module 1 and outside said module 1.
• the terms “left” and “right” correspond respectively to the left and to the right of FIGS. 1, 3 and 4.
• each light guide 10 has a section variable in the length direction.
• the section of each light guide 10 increases from upstream to downstream.
• the light guides 10 do not have the same thickness.
• thickness is understood to mean the dimension measured in the lateral direction represented by the axis T in FIGS. 1 to 4.
• the thickness of the light guides 10 varies as a function of the location of these guides in the row 15.
• the further the light guide moves away from the optical axis I the more the light guide moves away from the optical axis I.
• the light guides 31 and 38 located respectively at the left end 151 and the right end 152 in row 15, are the thickest guides in row 15.
• the adjacent light guides 10 join to each other by a material junction.
• the light guides 10 are classified into two categories of guides: the primary guides 3 and the secondary guides 4.
• the difference between the primary guides 3 and the secondary guides 4 lies in the fact that the junction between adjacent secondary guides 4 is located upstream of the junction between primary guides 3. This difference will be explained in detail later in the description.
• the light module 1 comprises two secondary guides 4 located in the middle of the horizontal row 15 of guides.
• these secondary guides 4 are hereinafter called the central guides 4.
• These central guides 4 are arranged on either side of the optical axis I of the light module, including a first central guide 41 located to the left of the optical axis I and a second central guide 42 located to the right of the same axis
• All light guides 10, whatever their category, include an input diopter 30, 410 or 420. Viewed from the side, all light guides 10 have a curved profile so that the input diopters are facing upwards, as illustrated in the figure
• Light sources 9 can be arranged facing the input diopters of all or part of the light guides 10.
• the primary lens 6 is placed at a distance and downstream from the part 2 so as to receive the rays emerging from the first face 210 of said part 2.
• the primary lens 6 here comprises, at the rear, a downstream face 62, and at the front, an upstream face 61.
• the upstream face 61 is less curved than the downstream face 62.
• the primary lens 6 is arranged so as to form a focal surface L represented by the dotted line in FIG. 4.
• the primary lens 6 therefore forms a system for projecting the guide outputs 10 of the part 2.
• FIGS. 3 and 4 respectively represent a rear view and a top view of the second portion 22 of the part 2 to better show the difference in level between the junction of the primary guides 3 and the junction of the central guides 4.
• the light module 1 comprises six primary guides 3, including three guides counted from a left end 151 of the horizontal row 15 and three other guides counted from a right end 152 of the same row 15.
• the primary guides 3 each comprise an inlet diopter 30 and an outlet 39.
• the outlets 39 of the primary guides 3 are illustrated by dashed lines in FIG. 3.
• its outlet referenced 398
• the outlet 398 is also delimited laterally by a vertical edge 313 of a right lateral face 34 of the guide 38 and by a junction 331 with the adjacent primary guide, located to the left of said guide 38.
• the adjacent primary guide is referenced 37 on Figure 3.
• the output of the left-hand primary guide 31 is defined in a similar manner.
• the primary guide 37 adjoining the right end guide 38 its outlet, referenced 397, is a surface delimited vertically by an upper face 371 and by a lower face 372. Said outlet 397 is delimited laterally by a first junction 331 with the right end primary guide 38 and by a second junction 332 with the primary guide located to the left of the primary guide 37.
• the primary guide located to the left of the primary guide 37 is referenced 36 in FIG. 3 .
• the junctions 33 , 331, 332 of the primary guides 3 are hereinafter called the primary junctions 33, 331, 332.
• the angular spacing between the first central guide 41 and the second central guide 42 can be a value between 5 ° and 15 °.
• the angular spacing is defined by the angle ⁇ formed by the right lateral face 415 of the first central guide 41 and the left lateral face 425 of the second central guide 42.
• the central junction 43 is located upstream relative to the primary junctions 33, 331, 332. Consequently, the outlets of the central guides 4 are also located upstream of the outlets 33 of the primary guides 3.
• the first central guide 41 comprises an input diopter 410 and an output 419 marked by small dashes in these FIGS. 3 and 4.
• the output 419 of the first central guide 41 is hereinafter called the first exit 419.
• the first outlet 419 is a surface delimited vertically by an upper face 411 and by a lower face 412 of the first central guide 41.
• the first outlet 419 is also delimited laterally by the central junction 43 and, here, by a substantially vertical line 414 belonging to a left lateral face 413 of the first central guide 41. This vertical line 414 is located at the level of the central junction 43.
• the second central guide 42 comprises an inlet diopter 420 and an outlet 429 also marked by a line of small dashes in FIGS. 3 and 4.
• the outlet 429 of the first central guide 41 is hereinafter called the second exit 429.
• the second outlet 429 is a surface delimited vertically by an upper face 421 and by a lower face 422 of said second central guide 42.
• the second outlet 429 is also delimited laterally by the central junction 43 and by a substantially vertical line 424 belonging to a straight lateral face 423 of the second central guide 42. This vertical line 424 is situated at the level of the central junction 43.
• the first and second central guides 41 and 42 thus arranged, form a set of two central guides, called a particular set 5.
• the first central guide 41 and the second central guide 42 unite in a single guide, forming a terminal portion 51 of the particular assembly 5.
• the downstream end of the terminal portion 51 forms the outlet 52 of the particular assembly 5.
• the terminal portion 51 is delimited longitudinally by the first and second outlets 419, 429 on the one hand and by the outlet 52 of the 'particular set 5 on the other hand.
• the outlet 52 of the particular assembly 5 is delimited laterally by a third junction 333 between the second central guide 42 and the primary guide 36 located to the right of said second guide 42, and by a fourth junction 334 between the first central guide 41 and the primary guide located to the left of said first guide 41, referenced 32 in FIGS. 3 and 4.
• the outlet 52 of the particular assembly 5 is arranged at the junction 334 between the first central guide 41 and the primary guide 32 adjacent to the left and at the junction 333 between the second central guide 42 and the primary guide 36 neighbor on the right.
• the outlet 52 of the particular assembly 5 is distinct from the first outlet 419 and the second outlet 429, and is located downstream of said outlets 419 and 429.
• the focal surface F of the primary lens 6 is arranged so as to be closest to the outlets 39 of primary guides 3 and the outlet 52 of the particular assembly 5. In this way, the rays bright at the outputs of the primary guides 3 and of the particular assembly 5 are imaged by the primary lens 6 while minimizing optical field aberrations.
• the focal surface F has a degree of curvature substantially similar to that of the first face 210 of the part 2.
• the central junction 43 is further from the focal surface F than the primary junctions 33, 331, 332 are in relation to said focal surface F.
• the distance di between the focal surface F and the central junction 43 is greater than the distance d 2 between the focal surface F and the primary junctions, in particular the second primary junction 332.
• Two light sources 9 are arranged opposite the input diopters of the central guides 4.
• a first light source 91 is placed opposite the input diopter 410 of the first central guide 41 while a second light source 92 is placed opposite the input diopter 420 of the second central guide 42.
• the first light source 91 is laterally distant from the second light source 92 by a value between 3 mm and 7 mm.
• the lateral distance between the first light source 91 and the second light source 92 is represented by the reference “d 3 ".
• the first and second light sources 91 and 92 can be single-chip light-emitting diodes.
• the first light source 91 emits light rays which propagate inside the first central guide 41 to the first outlet 419.
• the second light source 92 emits light rays which propagate inside from the second central guide 42 to the second exit 429.
• the light rays arrive in the terminal portion 51 where said rays can mix.
• walls delimiting this portion reflect the light rays so as to form a collimated and homogeneous light beam at the outlet 52.
• this collimated and homogeneous beam reaches the focal surface F and is projected by the primary lens 6 , forming an image comprising a high intensity illumination unit.
• FIG. 5 illustrates by way of example and schematically an image II of the light beam generated from the two light sources 91 and 92 and of the light module 1.
• Image II is obtained, for example, on a screen located 25 m from light module 1.
• the image II comprises an illumination unit 8 of rectangular shape and has a high light intensity.
• the illumination unit 8 can have a maximum illumination of 110 lux. .
• the illumination unit 8 obtained has a fairly regular rectangular shape.
• said illumination unit 8 when it is placed with other illumination units (not shown) corresponding to the primary guides 3, contributes to forming a homogeneous pixelated light beam.
• the quality of said beam is therefore improved, which makes it possible to provide better visibility comfort to the driver.
• the image obtained by the light module 1 will be different from the image II illustrated.
• the resulting image will include a light strip with a high intensity illumination unit in the middle.
• the light module 1 can be installed in a lighting device at the front of a motor vehicle. This lighting device can be designed to project a driving beam.
• the lighting device comprises a first light module arranged so as to generate a primary portion of the driving beam.
• the light module 1 described above called the second light module, is arranged so as to generate a secondary portion of the main beam. Said secondary portion is complementary to the primary portion of the driving beam and can be located above the cutoff line of a passing beam.

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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)
• Optical Couplings Of Light Guides (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=65201238

Family Applications (1)

Country Status (5)

Families Citing this family (6)

Family Cites Families (10)

• 2018
  • 2018-08-31 FR FR1857863A patent/FR3085463B1/fr active Active
• 2019
  • 2019-08-06 US US17/269,431 patent/US11530791B2/en active Active
  • 2019-08-06 WO PCT/EP2019/071122 patent/WO2020043443A1/fr unknown
  • 2019-08-06 CN CN201980056099.8A patent/CN112771305B/zh active Active
  • 2019-08-06 EP EP19753006.6A patent/EP3844436B1/de active Active

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