WO2024251700A1 - Module d'eclairage pour vehicule automobile - Google Patents
Module d'eclairage pour vehicule automobile Download PDFInfo
- Publication number
- WO2024251700A1 WO2024251700A1 PCT/EP2024/065265 EP2024065265W WO2024251700A1 WO 2024251700 A1 WO2024251700 A1 WO 2024251700A1 EP 2024065265 W EP2024065265 W EP 2024065265W WO 2024251700 A1 WO2024251700 A1 WO 2024251700A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screen
- configuration
- light sources
- row
- lighting module
- 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.)
- Ceased
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Classifications
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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
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/151—Light emitting diodes [LED] arranged in one or more lines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/24—Light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/27—Thick lenses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/36—Combinations of two or more separate reflectors
- F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
- F21S41/64—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
- F21S41/645—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices by electro-optic means, e.g. liquid crystal or electrochromic devices
-
- 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
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
- F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
- F21S41/686—Blades, i.e. screens moving in a vertical plane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
- B60Q2300/05—Special features for controlling or switching of the light beam
- B60Q2300/056—Special anti-blinding beams, e.g. a standard beam is chopped or moved in order not to blind
Definitions
- the present invention relates to the field of lighting, which includes signaling, and that of the organs, in particular optical organs, which participate therein. It finds a particularly advantageous application in the field of motor vehicles. In particular, it relates to a lighting module for a motor vehicle.
- modules which are capable of emitting light beams, also called lighting and/or signaling functions.
- modules must make it possible to emit light specifically in certain areas so as to exclude areas that must remain dark in areas that must be lit, this in order to be compatible with the various regulations in force, which are different depending on the country in question, and in particular with different traffic conditions (traffic on the right and traffic on the left), and also in order to provide greater comfort for road users, in particular by improving night driving conditions by allowing the driver to illuminate the road on which he is driving as much as possible without dazzling other road users.
- modules are known for performing adaptive functions, and in particular an adaptive driving beam (ADB beam in English for "Adaptive Driving Beam”) formed by a plurality of juxtaposed segments that can be selectively and individually activated.
- modules comprising two lines of activatable light sources. individually, superimposed one above the other and making it possible to form an adaptive main beam and a range beam of a segmented dipped beam.
- the adaptive main beam is produced by the light sources arranged in the upper line of light sources while the range beam of a dipped beam is produced by the light sources arranged in the lower line of light sources.
- the adaptive main beam and the range beam of a dipped beam are superimposed.
- An object of the present invention is therefore to propose a module making it possible to overcome all or part of the drawbacks cited.
- a lighting module for a motor vehicle comprising:
- first row of light sources emitting first light rays, the first row of light sources comprising light sources aligned in a direction, the light sources of the first row of light sources being individually activated
- first optical system having an optical axis, configured so that, after passing through the first optical system, first light rays form a first beam
- the lighting module is remarkable in that it comprises a screen switchable between a first configuration and a second configuration, such that: in the first configuration, the screen does not produce a cut in the first beam, so that the second beam is a high beam supplemental beam and in the second configuration, the screen is configured to produce a cut in the first beam such that the second beam is a range beam of a dipped beam headlight.
- this configuration makes it possible, from a single row of light sources (and therefore from a reduced number of light sources) to form a segmented main beam supplement and also a range beam of a segmented dipped beam, this thanks to the positioning of the screen switchable between two configurations.
- the screen does not interrupt a significant number of light rays coming from the first row of light sources (so that the screen does not create a cut in the second beam), this having the consequence that the second beam is a main beam supplement formed almost entirely from the light rays coming from the first row of light sources.
- the screen interrupts a significant number of light rays coming from the first row of light sources, this having the consequence that the second beam is a range beam of a dipped beam occupying a more or less significant height (depending on the positioning of the screen relative to the propagation of the beam). Furthermore, in the second configuration of the screen, from the same lighting module, thanks to the individual control of the switching on of the light sources, it is thus possible to obtain a beam of range of a dipped beam having a cut-off that can be on the right or on the left.
- the lighting module developed therefore achieves significant compactness and simplicity thanks to a lighting module allowing, from the two configurations of the screen, to comply with either American standards or ECE standards. Also, the lighting module according to the present invention allows a reduction in costs (compared to a lighting module requiring the positioning of several rows of light sources) because it implements a single row of light sources.
- the lighting module comprises a second row of light sources emitting second light rays
- the first optical system comprises a dioptric part comprising a first reflector, a second reflector, an entry face and an exit face, the second row of light sources, the first reflector and the second reflector being configured such that the second light rays after having been transmitted by the entry face are reflected by the first reflector, then by the second reflector before being transmitted by the output face, so that the second row of light sources forms a near-field beam of dipped beam.
- the integration into the lighting module of a near-field beam of a dipped beam makes it possible to obtain a dual-function lighting module capable of forming complete lighting, i.e. capable of forming a main beam supplement, a dipped beam range beam and a near-field beam of a dipped beam.
- the invention relates to a lighting module in which:
- the output face has a lower portion, an upper portion and a central portion, the direction and the optical axis forming a first plane, a second plane being perpendicular to the first plane and passing through the optical axis, the lower portion having a lower curvature in the second plane, the upper portion having a higher curvature in the second plane and the central portion having a central curvature in the second plane, and wherein the lower curvature is different from the central curvature and is configured to produce, according to the second plane, a spreading of the light rays greater than the spreading produced by the central curvature, preferably, the lower curvature is more convex than the central curvature.
- the first light beam will have, at the level of the illumination resulting from the passage of the first light rays through the lower part, a greater spread compared to the case where the lower curvature is equal to the central curvature.
- This configuration will make it possible to increase the spread of the first beam in its lower part so that after the transmission of this first beam by the second optical system, the second beam obtained has a spread in its upper part.
- the value of the lower curvature relative to the value of the central curvature will make it possible to obtain a sufficiently spread road supplement beam.
- the invention relates to a lighting module in which the screen, in the second configuration, is positioned relative to the lower part so as to intercept the first light rays and the second light rays having been transmitted by the lower part.
- this configuration allows the screen to interrupt the propagation of light rays having been transmitted by the lower part.
- the configuration of the lower curvature only influences the propagation of the light rays having passed through the lower part
- the positioning of the screen will make it possible to block the light rays to form a beam with the range of a dipped beam. Indeed, without the positioning of the screen and in particular because of the configuration of the lower curvature (and therefore the vertical spread of the resulting beam), it would not have been possible to obtain a beam with the range of a dipped beam.
- the invention relates to a lighting module in which, in the first configuration and in the second configuration, the second row of light sources, the first reflector and the second reflector, the entry face and the exit face are configured such that at least 80% of the second light rays which impact the exit face are transmitted by the upper part and by the central part.
- This configuration allows that, in the second configuration of the screen, the propagation of the near-field beam of the dipped beam is almost not impacted by the positioning of the screen, this so that the lighting module is complete and therefore allows different lighting functions to be formed (the near-field beam of the dipped beam undergoing only a slight loss of intensity due to the positioning of the screen 4).
- Another aspect is a vehicle equipped with at least one such lighting device.
- Figure 1 shows a sectional view (at the optical axis) of the lighting module according to the invention where the paths of the light rays can be observed.
- Figure 2 shows a sectional view of a lighting module according to one embodiment of the invention where the low beam near field beam can be observed.
- FIG. 3 shows a sectional view of a lighting module according to an embodiment of the invention where the four reflectors for directing the main beam supplement (or the range beam of a dipped beam) and the near-field beam of the dipped beam can be observed.
- Figure 4 shows, in the first configuration, the projection of the beam of the near field of dipped beam coming from the second row of light sources and the projection of the supplementary main beam coming from the first row of light sources.
- Figure 5 shows, in the second configuration and in the case of right-hand driving, the projection of the near-field beam of the dipped beam from the second row of light sources and the projection of the range beam of the dipped beam from the first row of light sources (the projection of the segments from the first row of light sources that are not lit are hatched and those that are lit are not hatched) where it can be observed that the projection of the segments from the first row of light sources is less extensive than that illustrated in Figure 4 because the screen, in the configuration of Figure 5, has interrupted the propagation of part of the rays from the first row of light sources.
- the screen 4, in the second configuration 5b is configured to block at least 80%, and preferably at least 96%, of the first light rays 1a which impact the screen 4.
- This configuration allows the screen 4 not to disturb the formation of a complementary beam.
- the screen 4 is opaque and is mechanically switchable between the first configuration 5a and the second configuration 5b such that:
- the screen 4 is arranged at a distance from the first beam 6,
- the screen 4 is placed on the path of the first beam 6.
- the screen 4 will not disturb the formation of a road complement beam.
- the screen 4 will allow the formation of a range beam of a dipped beam.
- the screen 4 passes from the first configuration 5a to the second configuration 5b by a translation of the screen 4 along a vertical axis 8.
- the screen 4 is arranged at a distance from the first beam 6 and in the second configuration 5b, the screen 4 is placed on the path of the first beam 6.
- the screen 4 is electronically switchable between the first configuration 5a and the second configuration 5b, and the screen 4, in the first configuration 5a, is configured to allow at least 40% of the first light rays 1a which impact the screen 4 to pass through.
- the screen 4 comprises liquid crystals encapsulated in a polymer.
- the second beam 7 in the first configuration 5a, has an angular height of between 5° and 6° and in the second configuration 5b, the second beam 7 has an angular height of between 0.5° and 1.5°.
- This configuration takes into account the fact that the second beam, in the first configuration, is a main beam supplement and, in the second configuration, the second beam is a range beam of a dipped beam. Indeed, the range beam of a dipped beam will occupy a lower angular height than that occupied by the main beam supplement.
- the first optical system 2 comprises at least one of: a reflector, light guides, a lens, a dioptric part.
- the lighting module can consist of numerous configurations, such as in particular those illustrated in FIGS. 2 and 3.
- the reflectors make it possible to modify the path of the light rays coming from the first row 1 of light sources and also those from the second row 9 of light sources so that the light rays in question are oriented in the desired direction.
- the light guides have the function of directing the light beam to the desired positions, this due to the reflections undergone by the light rays inside the waveguide.
- each light source can be associated with a separate light guide.
- the light guides can be integral with the primary lens (and in particular with the entry face of the primary lens) and thus constitute a single piece with the primary lens.
- the lens and the dioptric piece serve to direct the light beams in desired directions and also to project the light beams.
- the screen 4 has a horizontal upper edge 4a.
- edge 4a which may be a face or a horizontal edge
- the second beam, in the second configuration 5b will have a brightness delimitation which is also horizontal. This configuration is necessary in order to meet the requirements of standards, in particular European and American.
- the upper curvature 19a is different from the central curvature 20a and is configured to produce, according to the second plane p2, a spreading of the light rays greater than the spreading produced by the central curvature 20a, preferably, the upper curvature 19a is more convex than the central curvature 20a.
- this configuration makes it possible to obtain a greater spread of the light rays compared to the case where the upper curvature 19a is equal to the central curvature 20a.
- This configuration thus makes it possible to obtain a better junction and homogeneity between the beam coming from the first row 1 of light sources and that coming from the second row 9 of light sources.
- the light sources of the second row 9 of light sources can be activated individually.
- the light sources of the lighting module can be selectively switched on or off so as to form the resulting lighting having the desired configuration.
- This configuration therefore makes it possible to control the brightness value according to the area considered.
- the acronym ADB is used for this type of function.
- the terms relating to verticality, horizontality or transversality (or lateral direction), or their equivalents, are understood in relation to the position in which the lighting system is intended to be mounted in a vehicle.
- the terms “vertical” and “horizontal” are used in the present description to designate directions, following an orientation perpendicular to the plane of the horizon for the term “vertical” (which corresponds to the height of the systems), and following an orientation parallel to the plane of the horizon for the term “horizontal”. They are to be considered in the operating conditions of the module in a vehicle. The use of these words does not mean that slight variations around the vertical and horizontal directions are excluded from the invention.
- an inclination relative to these directions of the order of + or - 10° is here considered as a minor variation around the two preferred directions.
- the inclination is in principle between -5° and +4° and it is between -6° and +7.5° laterally.
- upper edge of the screen refers to the area of the screen delimiting the upper part of the screen from the rest of the lighting module (this upper part of the screen therefore having the function of cutting the first beam and thus delimiting the lower part of the first beam from an unlit area).
- the "upper edge” can correspond to "the upper face” (in the case where the screen is a parallelepiped) or "the upper edge” (in the case where the screen is a parallelepiped surmounted by a rectangular-based prism) of the screen.
- “Upper part” means an area located more towards the top, in comparison to a “lower part”.
- “central part” means the part located between the “upper part” and the “lower part”.
- interrupt in the context “interrupted by a first side of the screen” means that on the second side of the screen, all of the light rays having been interrupted (by the first side of the screen) are absent, that is to say that all of these light rays have been reflected or absorbed in particular and that they have not been transmitted.
- the name “intercept” means that the elements that are intercepted by a structure are brought into contact with this structure because the direction of their movement is oriented towards this structure.
- the screen 4 in the second configuration 5b, intercepts light rays, it is understood that the screen 4 interrupts at least 90% of the propagation of these rays.
- the term "angular height” means the angle that the direction of reference makes with respect to the horizontal direction.
- the direction of reference aims at the upper end of the light projection whose angular height is measured
- the horizontal direction aims at the lower end of the light projection.
- the aiming direction and the horizontal direction are intersecting at the LED whose angular height of the light projection is measured. Since the light projection from the LED in question forms (on a screen) a pixel having a square or rectangular shape, the upper end of the light projection is the side of the square or rectangle located most upwards and the lower end of the light projection is the side of the square or rectangle located most downwards.
- the lighting module for a motor vehicle comprises a first row 1 of light sources, a first optical system 2, a second optical system 3 and a screen 4.
- the first row 1 of light sources emits first light rays 1 a.
- the first row 1 of light sources comprises light sources arranged in a straight line in a direction d.
- the light sources of the first row 1 of light sources are individually ignitable.
- the first optical system 2 has an optical axis 21. After passing through the first optical system 2, first light rays 1 a form a first beam 6.
- the first light rays 1 a are transmitted first by the first optical system 2 and second by the second optical system 3.
- the second optical system 3 is configured to project (at a long distance) the first beam 6 by forming a second beam 7.
- the screen 4 is switchable between a first configuration 5a and a second configuration 5b.
- the screen 4 is positioned, along the optical axis 21, between the first optical system 2 and the second optical system 3.
- the screen 4 is configured so that it does not produce a cut-off in the first beam 6, such that the second beam 7 is a main beam supplement 28.
- the screen 4 is configured to produce a cut-off in the first beam 6 such that the second beam 7 is a range beam of a dipped beam 29.
- the screen is preferably a unitary element forming a continuous light ray blocking surface when it is active. However, it may be in several parts, in particular juxtaposed. Nevertheless, overall, it is desirable for the light ray blocking surface formed by the screen to be continuous. In the case where the surface intercepting the light rays is not, on its own, sufficient to achieve a sufficient level of opacity, it is possible to associate in the sense of the screen several surfaces following one another in the direction of propagation of light in the module, so as to reduce the overall optical transmission of the screen. This is particularly the case in the embodiment where the screen consists of LCD liquid crystal technology: two LCD surfaces can be arranged in series.
- the first row 1 of light sources only comprises light sources all aligned in the direction d.
- the light sources of the first row 1 of light sources can be activated in groups so that only certain light sources of the first row 1 of light sources (or of the second row 9 of light sources) are activated at a given time.
- Figure 1 shows the screen in the second configuration 5b.
- the screen is thus represented in solid lines.
- the screen in the first configuration 5a is also shown schematically but this time in dotted lines.
- the screen 4 can be positioned perpendicular to the optical axis 21.
- the screen 4 may have a rectangular shape.
- the screen 4 may be positioned at a distance of between 0.5 mm and 3 mm below the optical axis 21, preferably, the screen 4 may be positioned at a distance of 1.5 mm below the optical axis 21.
- the first optical system 2 allows the shaping of the light rays from the first row of light sources into a light beam.
- the second optical system 3 allows the projection of the light rays shaped by the first optical system 2.
- the second beam 7 is a range beam of a dipped beam 29.
- This beam comes from the first row 1 of light sources.
- This type of beam overlaps the horizon line.
- the lower edge of this type of beam can be juxtaposed with the horizontal line located at -0.57°.
- the lower edge of this type of beam can slightly overlap the horizontal line at -0.57° so as to have good homogeneity with the near-field beam of the dipped beam in the final beam, and thus avoid the formation of a dark zone in the final beam.
- the second beam 7 forms, in particular, the shoulder portion of the cutoff of a dipped beam.
- This resulting shoulder portion is also called the kink portion of the dipped beam. It is particularly visible in FIG. 5. It is located at the boundary between the non-dipped segments. hatched segments that are lit and hatched segments that are not lit.
- Dipped beam type beams typically have a first lateral zone (normally on the edge of the roadway) projecting at a height slightly higher than in a second lateral zone (normally on the middle of the roadway), these two zones following each other laterally with the presence of a bend or elbow between them.
- the near-field beam of a dipped beam 27, in particular shown in FIGS. 4 and 5, corresponds to a beam that can be considered as the base of a dipped beam.
- the range beam of a dipped beam 29 forms, in combination (by being arranged above, with a possible overlap) with a near-field beam of a dipped beam 27, a dipped beam.
- the combination of these two beams is visible in FIG. 5.
- the near-field beam of a dipped beam 27 is a wide beam, the highest part of which forms a horizontal upper cutoff which is located at 0° or below, for example at -0.57° below the horizon line.
- the near-field beam of a dipped beam 27 is a wide beam compared to a range beam of a dipped beam 29.
- the lower edge of the segments forming the range beam of a dipped headlight 29 may be juxtaposed with the horizontal upper cutoff of the near-field beam of a dipped headlight 27.
- the juxtaposition of the lower edge of the segments forming the range beam of a dipped headlight 29 with the horizontal upper cutoff of the near-field beam of a dipped headlight 27 does not exclude a slight overlap between the segments forming the range beam of a dipped headlight 29 and the near-field beam of a dipped headlight 27.
- a road supplementary beam 28 has the function of illuminating the scene in front of the vehicle over a wide area, but also over a significant distance, typically about two hundred meters.
- This light beam due to its lighting function, is located mainly above the horizon line. It may have a slightly ascending optical axis of illumination for example.
- it may be used to generate a lighting function of the “complementary” type which forms a portion of a road light complementary to that produced by a near-field beam, the road supplement seeking in its entirety or at least mainly to illuminate above the line horizon while the near-field beam (which may have the specific features of a dipped beam) seeks to illuminate entirely or at least mainly below the horizon line.
- the road complement can therefore be a main part of the overall "road" beam and be associated with another beam participating in the dipped beam.
- the supplementary high beam 28 forms, in combination with a dipped beam near-field beam 27, a high beam beam, as schematically shown in FIG. 4.
- the high beam beam is formed solely by the combination of the supplementary high beam and the dipped beam near-field beam.
- the screen 4, in the second configuration 5b is configured to stop the path of at least 80%, and preferably at least 96%, of the first light rays 1a which come into contact with the screen 4.
- the screen 4 opposes the passage of light.
- the screen 4 is mechanically switchable between a first configuration 5a and a second configuration 5b such that:
- the screen 4 is moved away from the path of the first beam 6,
- the screen 4 is arranged on the path of the first beam 6.
- the screen 4 passes from the first configuration 5a to the second configuration 5b by a modification of its position along a vertical axis 8. For this, the screen 4 can then be translated along a vertical axis 8. The screen 4 can also pass from the first configuration 5a to the second configuration 5b by a lateral tilting of the screen 4.
- the screen 4 in the case where the screen 4 is mechanically switchable, in the first configuration, the screen 4 is at a distance from the light rays coming from the first row 1 of light sources whereas in the second configuration, it is on the path of the light rays coming from the first row 1 of light sources so as to stop the propagation of some of these light rays.
- the screen 4 is electronically switchable between a first configuration 5a and a second configuration 5b.
- the screen 4, in the first configuration 5a, can then be configured to stop the path of at most 60% of the first rays bright 1 a which impact the screen 4.
- the screen 4 comprises liquid crystals encapsulated in a polymer.
- the screen 4 when not powered on, has an opaque surface.
- the liquid crystals encapsulated in a polymer are then arranged in a disordered manner, such that light cannot pass through the screen.
- the screen 4 when powered on, has a transparent surface.
- the liquid crystals encapsulated in a polymer are then arranged in an ordered manner, such that light can pass through the screen.
- the second beam 7 has an angular height of between 5° and 6°.
- the second beam 7 has an angular height of between 0.5° and 1.5°.
- the first optical system 2 comprises at least one of: a reflector, light guides, a lens, a dioptric part.
- the first optical system 2 may comprise a primary lens.
- the second optical system 3 may comprise a projection lens.
- the first optical system 2 may comprise a biconvex, convex-concave or plano-convex spherical lens.
- the second optical system 3 may comprise a biconvex, convex-concave or plano-convex spherical lens.
- the screen 4 has a horizontal edge 4a in the upper part.
- the direction d can be perpendicular to the optical axis 21.
- the transmission of the light rays when the screen is in the “on” position can be 45% while when the screen is in the “off” position it can be 4%.
- the transmission value of 45% corresponds to a linear absorption coefficient of the screen with a value of 0.4 mm -1 .
- the transmission value of 4% corresponds to a linear absorption coefficient of the screen with a value of 1.6 mm' 1 .
- the screen is mechanically switchable, a mechanism provided with a return spring and an electromagnet can be put in place work.
- the screen can be powered by current in the first configuration 5a while in the second configuration it is not.
- the lighting module comprises a second row 9 of light sources emitting second light rays 9a.
- the first optical system 2 comprises a dioptric part 14.
- the dioptric part 14 comprises a first reflector 11, a second reflector 12, an entry face 10 and an exit face 16.
- the second row 9 of light sources, the first reflector 11 and the second reflector 12 can be configured so that the second row 9 of light sources forms a near-field beam of dipped beam 17.
- the light rays emitted by the second row 9 of light sources after having passed through the entry face 10 can first go towards the first reflector 11, second towards the second reflector 12 and in order to pass through the exit face 16.
- the entry face 10 and the exit face 16 form a single part with the first reflector 11 and the second reflector 12.
- the first reflector 11 and the second reflector 12 are internal total reflection surfaces.
- FIG. 2 This embodiment can be seen in Figure 2 where the first reflector 11 and the second reflector 12 are shown.
- the rays from the first row 1 of light sources can pass through the input face and then the output face of the first optical system 2 before reaching the second optical system 3.
- the first optical system 2 and the second optical system 3 can each be a dioptric part that can be a lens.
- the screen 4 is positioned, along the optical axis 21, between the first optical system 2 and the second optical system 3.
- the input face of the first optical system 2 can be inclined so that the angle between the input face 10 and the optical axis 21 has a value between 85° and 95°.
- the angle between the input face 10 and the optical axis 21 has a value of 92°.
- the first reflector 11 can be positioned at a distance of between 18 mm and 22 mm below the second reflector 12, preferably This distance can be 20 mm.
- the first row 1 of light sources can be positioned at the object focal plane of the first optical system 2. This configuration makes it possible to form the image of the first row 1 of light sources at infinity. Given the positions of the different elements of the lighting module according to the embodiment illustrated in FIG. 2, the light rays from the first row of light sources and those from the second row of light sources can share the same propagation zone.
- Each light source of the second row 9 can be associated with a collimator 22 having the function of receiving the light from said source and sending it in a collimated manner towards the input face of the first optical system 2.
- the collimators 22 are oriented so as to direct the collimated light rays towards the first reflector 11. More precisely, the output face of the collimators 22 can be oriented towards the second reflector 12.
- the longitudinal axis of symmetry of the collimators forms with the optical axis 21 an angle of between 0° and 30°.
- the light coming from the second row 9 of light sources when it reaches the second optical system 3 does not come directly from the second row 9 of light sources (as is the case for the first row 1 of light sources (which has not undergone reflection on reflectors) which is then a direct light source).
- the light coming from the second row 9 of light sources is therefore an indirect light source.
- the lighting module according to the invention may have the particular features of the lighting module illustrated in FIG. 2. But it may also have the particular features of the lighting module illustrated in FIG. 3.
- the embodiment illustrated in FIG. 3 consists of two sets of two reflectors allowing the first row of light sources to be reflected on one of the reflectors of the first set 25, then to be reflected on the other reflector of the first set 26 before passing through the second optical system 3 and allowing the second row of light sources to be reflected on one of the reflectors of the second set 23, then to be reflected on the other reflector of the second set 24 before passing through the second optical system 3.
- the reflector of the first set furthest downstream can be positioned upstream of the object focal plane of the second optical system 3 with a zone of this reflector in contact with the object focal plane of the second optical system 3 while the reflector of the second set furthest downstream downstream can be positioned downstream of the object focal plane of the second optical system 3 with an area of this reflector in contact with the object focal plane of the second optical system 3.
- This configuration makes it possible to form at its points of contact with the object focal plane an image at infinity of the beams.
- the light rays from the first row of light sources and those from the second row of light sources can share the same propagation zone.
- the screen 4 can be positioned, along the optical axis 21, before the second optical system 3.
- the four reflectors can have a horizontal dimension of between 40 mm and 60 mm, for example equal to 50 mm.
- the four reflectors can have a vertical dimension of between 40 mm and 60 mm, for example equal to 50 mm.
- the first row of light sources can be positioned on a horizontal support (the row of light sources is then directed in a direction parallel to the first plane p1).
- the lighting module comprises a reflector configured so that the light rays from the first row of light sources are reflected on this reflector before reaching the first optical system 2 whose optical axis is horizontal.
- the lighting module can comprise a reflector per light source.
- the lighting module according to the invention is applicable to all lighting modules making it possible to form a road supplementary beam.
- the near-field beam of the dipped beam 17 can also be called a “fiat” beam for flat or spread beam. It is projected globally under the cut-off and is used to illuminate the near field at the front of the vehicle.
- the beam from the first row 1 of light sources makes it possible to define a cut-off zone.
- the combination of the near-field beam and the beam from the first row 1 of light sources makes it possible to at least partially define a dipped beam.
- a near-field beam of a dipped beam headlight is typically a relatively laterally spread projection at the front of the vehicle, mostly or totally below the horizon line, generally seeking a good distribution of illumination across the entire the illuminated area.
- the module can also be used to form other lighting functions via or outside those described above, in relation to the adaptive beams. It is thus possible to produce a lighting matrix for selectively illuminating parts of the space in front of the vehicle.
- the first row 1 of light sources may be spaced from the first optical system 2 by a distance of between 0.25 and 1.2 mm. Preferably, the first row 1 of light sources may be spaced from the first optical system 2 by a distance of 0.7 mm.
- This distance is chosen according to the thermal resistance of the material of the first optical system 2 which is selected so as to minimize as much as possible the distance between the light sources and the first optical system 2, this in order to collect the maximum amount of light and therefore to maximize efficiency.
- the input face 10 may be distant from the output face 16 by a distance of between 35 mm and 45 mm. Preferably, the input face 10 may be distant from the output face 16 by a distance of 40 mm. This distance is taken into account at the optical axis 21.
- the input face of the second optical system 3 may be distant from the output face of the second optical system 3 by a distance of between 10 mm and 33 mm.
- the input face of the first optical system 2 may be distant from the output face of the second optical system 3 by a distance of 72 mm.
- the second row 9 of light sources can be fixed on a support.
- This support can be made of Printed Circuit Board (PCB).
- the first row 1 of light sources can be fixed on a support.
- This support can be made of Printed Circuit Board (PCB).
- the rows can be fixed on these supports by gluing or by another type of fixing, for example by clip.
- the output face 16 has a lower part 18, an upper part 19 and a central part 20.
- the direction d and the optical axis 21 form a first plane p1.
- a second plane p2 is positioned so as to form a right angle with the first plane p1 and to pass through the optical axis 21.
- the outlet face 16 is convex.
- the inlet face 10 is convex.
- the lower curvature 18a may differ from the central curvature 20a and is configured to produce, according to the second plane p2, a staggering of the light rays such that the average distance between any two light rays is greater than the average distance between any two light rays produced by the central curvature 20a.
- the lower curvature 18a is more re-entrant than the central curvature 20a.
- the LEDs of the first row 1 give images each forming a square.
- the LEDs of the first row 1 give images each forming a rectangle (making it possible to form the main beam complement).
- the screen 4 which is positioned in front of the lower part 18 makes it possible to cut off part of the lighting so that the final projection has an upper border corresponding to the cut-off (and thus allows the formation of a beam with the range of a dipped beam).
- the upper curvature 19a differs from the central curvature 20a and is configured to produce, according to the second plane p2, a staggering of the light rays such that the average distance between any two light rays is greater than the average distance between any two light rays produced by the central curvature 20a.
- the upper curvature 19a is more re-entrant than the central curvature 20a.
- the screen 4 in the second configuration 5b is positioned relative to the lower part 18 so that the first light rays 1a and the second light rays 9a having been transmitted by the lower part 18 are directed towards the screen 4.
- the second row 9 of light sources, the first reflector 11, the second reflector 12, the entry face 10 and the exit face 16 are configured so that at least 20% (and preferably at least 10%) of the second light rays 9a which interact with the exit face 16 are transmitted by the lower part.
- the light sources of the second row 9 of light sources are selectively activatable, thereby creating a pixelated light source.
- a segmented beam is a beam whose projection forms an image composed of beam segments (resulting from the lighting of a group of light sources), each segment being able to be lit independently.
- emissive elements are necessarily simultaneously active, i.e. emissive of light.
- This function makes it possible to modulate the shape of the beam rendered.
- a light source is not activated, its image, as projected by the optical module, will be zero. It then forms an unlit zone in the resulting overall beam.
- This void is understood to include coupling phenomena at the source and the effects of parasitic light from the optics.
- the fact that the beams resulting from the first row 1 of light sources and the second row 9 of light sources are segmented and therefore that the segments of these beams are selectively activatable makes it possible to form a dynamic cornering light, i.e. the position of the dipped beam cut-off can be adapted according to the situation, whether the bend is to the right or to the left.
- the system according to the invention may comprise a unit for controlling the activation of each of the sources, configured to produce at least one dark zone forming a tunnel in a projected beam by deactivating a group of adjacent sources, the control unit being configured to determine the number of sources in the group corresponding to the dark zone as a function of the width dimension of the sources.
- the control unit may comprise a computer program product, preferably stored in a non-transitory memory, in which the computer program product comprises instructions which, when executed by a processor, make it possible to determine the sources to be activated, in particular to obtain at least one dark zone (in which the sources are not activated) of a determined surface taking into account the variable surface of the images of the elements.
- the light sources of row 1 of light sources may be composed of 24 light sources.
- the light sources of the second row 9 of light sources may be composed of 8 light sources.
- the light sources of the second row 9 of light sources can be aligned in a direction parallel to the direction d.
- the light sources of the entire device may be light-emitting diodes, also commonly called LEDs.
- the LEDs of the entire lighting module have an emissive surface of 0.5 mm 2 or 1 mm 2 .
- the LEDs having an emissive surface of 0.5 mm 2 may have a height and width of 0.76 mm.
- the LEDs having an emissive surface of 1 mm 2 may have a height and width of 1 mm.
- the size of the LEDs is directly related to the volume of the desired beam.
- the centers of two consecutive light sources of the first row 1 of light sources and the second row 9 of light sources may be at a distance of 25 pm.
- the height difference between the first row 1 of light sources and the second row 9 of light sources may be between 22 mm and 26 mm.
- the height difference between the first row 1 of light sources and the second row 9 of light sources may be 24 mm.
- the first optical system 2 and the second optical system 3 are made of PMMA (polymethyl methacrylate), silicone, glass or PC (polycarbonate).
- the system comprising the first optical system 2 and the second optical system 3 may have a focal length of 42.5 mm.
- the field of view of the beam from the second light sources exiting the projection lens 15 may be 35°.
- the first optical system 2 and the second optical system 3 have a size of 30 by 60 mm (height by width) (taking into account the fixing zones).
- At least one of the input face of the second optical system 3 and the output face of the second optical system 3 may have on its surface reliefs having a micrometric size.
- the term “reliefs having a micrometric size” means a surface state in particular on a diopter which comprises a set of projecting elements having a depth of less than 600 pm. More precisely, this microstructure may project to a depth of less than 50 pm for the output face and to a depth of less than 600 pm for the input face.
- This microstructure may comprise concentric patterns. The patterns may be striations or studs.
- Several lighting modules according to the invention can be arranged in a housing closed by a glass so as to obtain one or more lighting and/or signaling beams at the output of the projector.
- a projector can also be complex and associate several modules which can, in addition, possibly share components.
- first row of light sources 1a first rays of light
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480038265.2A CN121336068A (zh) | 2023-06-08 | 2024-06-04 | 用于机动车辆的照明模块 |
| EP24731845.4A EP4724729A1 (fr) | 2023-06-08 | 2024-06-04 | Module d'eclairage pour vehicule automobile |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2305774 | 2023-06-08 | ||
| FR2305774A FR3149670A1 (fr) | 2023-06-08 | 2023-06-08 | Module d’éclairage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024251700A1 true WO2024251700A1 (fr) | 2024-12-12 |
Family
ID=87889186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/065265 Ceased WO2024251700A1 (fr) | 2023-06-08 | 2024-06-04 | Module d'eclairage pour vehicule automobile |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4724729A1 (fr) |
| CN (1) | CN121336068A (fr) |
| FR (1) | FR3149670A1 (fr) |
| WO (1) | WO2024251700A1 (fr) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011119184A (ja) * | 2009-12-07 | 2011-06-16 | Stanley Electric Co Ltd | 車両用前照灯 |
| EP2706287A2 (fr) * | 2012-09-07 | 2014-03-12 | Koito Manufacturing Co., Ltd. | Lampe véhiculaire |
| DE102017127706A1 (de) * | 2016-11-30 | 2018-05-30 | Lextar Electronics Corporation | Linsenanordnung, Fahrzeuglampenlinsengruppe, die eine Linsenanordnung verwendet, und Fahrzeuglampenbaugruppe, die eine Fahrzeuglampenlinsengruppe verwendet |
| DE102017100818A1 (de) * | 2017-01-17 | 2018-07-19 | HELLA GmbH & Co. KGaA | Beleuchtungsvorrichtung und Verfahren zur Erzeugung einer Lichtverteilung für Fahrzeuge |
| EP3501896A1 (fr) * | 2017-12-21 | 2019-06-26 | Stanley Electric Co., Ltd. | Dispositif d'éclairage |
| EP3537032A1 (fr) * | 2018-03-05 | 2019-09-11 | Stanley Electric Co., Ltd. | Outil d'éclairage pour véhicule |
| WO2022244677A1 (fr) * | 2021-05-21 | 2022-11-24 | スタンレー電気株式会社 | Feu de vehicule |
| US20230093629A1 (en) * | 2021-09-20 | 2023-03-23 | Apple Inc. | Multi-Mode Lights |
-
2023
- 2023-06-08 FR FR2305774A patent/FR3149670A1/fr not_active Ceased
-
2024
- 2024-06-04 WO PCT/EP2024/065265 patent/WO2024251700A1/fr not_active Ceased
- 2024-06-04 CN CN202480038265.2A patent/CN121336068A/zh active Pending
- 2024-06-04 EP EP24731845.4A patent/EP4724729A1/fr active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011119184A (ja) * | 2009-12-07 | 2011-06-16 | Stanley Electric Co Ltd | 車両用前照灯 |
| EP2706287A2 (fr) * | 2012-09-07 | 2014-03-12 | Koito Manufacturing Co., Ltd. | Lampe véhiculaire |
| DE102017127706A1 (de) * | 2016-11-30 | 2018-05-30 | Lextar Electronics Corporation | Linsenanordnung, Fahrzeuglampenlinsengruppe, die eine Linsenanordnung verwendet, und Fahrzeuglampenbaugruppe, die eine Fahrzeuglampenlinsengruppe verwendet |
| DE102017100818A1 (de) * | 2017-01-17 | 2018-07-19 | HELLA GmbH & Co. KGaA | Beleuchtungsvorrichtung und Verfahren zur Erzeugung einer Lichtverteilung für Fahrzeuge |
| EP3501896A1 (fr) * | 2017-12-21 | 2019-06-26 | Stanley Electric Co., Ltd. | Dispositif d'éclairage |
| EP3537032A1 (fr) * | 2018-03-05 | 2019-09-11 | Stanley Electric Co., Ltd. | Outil d'éclairage pour véhicule |
| WO2022244677A1 (fr) * | 2021-05-21 | 2022-11-24 | スタンレー電気株式会社 | Feu de vehicule |
| US20230093629A1 (en) * | 2021-09-20 | 2023-03-23 | Apple Inc. | Multi-Mode Lights |
Also Published As
| Publication number | Publication date |
|---|---|
| CN121336068A (zh) | 2026-01-13 |
| FR3149670A1 (fr) | 2024-12-13 |
| EP4724729A1 (fr) | 2026-04-15 |
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