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
  • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
  • F21S41/32—Optical layout thereof
  • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
  • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
  • F21S41/333—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas with discontinuity at the junction between adjacent areas
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/10—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
  • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
• • 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
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
  • F21S41/32—Optical layout thereof
  • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
  • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
  • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
  • F21S41/32—Optical layout thereof
  • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
  • F21S41/338—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having surface portions added to its general concavity
• • 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
  • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V7/00—Reflectors for light sources
  • F21V7/04—Optical design
  • F21V7/06—Optical design with parabolic curvature
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V7/00—Reflectors for light sources
  • F21V7/04—Optical design
  • F21V7/08—Optical design with elliptical curvature

Definitions

• the invention relates to the field of lighting and light signaling, more particularly in the automotive field.
• Such a light module conventionally comprises a first collector with a first reflecting surface of revolution with an elliptical profile, in the form of a cap in a half-space delimited by a horizontal plane.
• a first essentially point light source, of the light-emitting diode type is located at a first focal point of the first reflecting surface and illuminates in the half-space in the direction of said surface. The rays are thus reflected in a convergent manner towards a second focal point of the first reflecting surface.
• An auxiliary, generally planar, reflective surface with a cut-off edge at the second focal point ensures upward reflection of rays that do not precisely pass through the second focal point, these rays then being refracted by a thick lens down the beam lighting.
• This auxiliary reflective surface is commonly referred to as a "bender” in that it "bends" upward from the projection lens rays which would otherwise form an upper portion of the illumination beam.
• This first light beam has a horizontal cut-off, possibly with a projection (commonly designated by the English term "kink”) and corresponds to a lighting beam of the code type (commonly designated by the English term "low-beam").
• the second light source can have several illuminating zones that can be activated separately, and the second reflecting surface can be segmented into several sectors, so as to form a segmented light beam.
• Such a light module has the drawback of requiring high precision in the positioning of the folder and the cutting edge.
• the projection lens must be a thick lens because of its short focal length, which increases its weight and complicates its production, such as sink defects in particular.
• the collector has a certain height and, therefore, a certain height requirement.
• the object of the invention is to overcome at least one of the drawbacks of the aforementioned prior art. More particularly, the invention aims to provide a light module capable of forming a potentially cut-off light beam, which is compact and more economical to produce.
• the subject of the invention is a light module, in particular for a motor vehicle, comprising a first light source capable of emitting light rays, and a first reflecting surface configured to collect and reflect the light rays emitted by said first light source in a first beam luminous along an optical axis of the module; a second light source and a second reflecting surface configured to collect and reflect light rays emitted by said second light source into a second light beam along the optical axis; an optical system configured to project the first and second light beams; remarkable in that the first and second light sources emit light rays in the same direction, the first and second reflecting surfaces are offset along the optical axis, and the optical system is configured to form an image of the second reflecting surface.
• the optical system has a focus located on or near the second reflecting surface and has a sufficient depth of field. This is advantageously at least 30%, more advantageously the entire length, along the optical axis, of the second reflecting surface.
• a large focal length and reduced height of a projection lens provide a great depth of field.
• the rays incident to the optical system are parallel to the optical axis or are inclined by less than 25 °, preferably by less than 15 ° relative to said optical axis, so as to be under Gauss conditions.
• the first light beam is advantageously an automotive lighting beam of the code type (in English "low-beam") or part of such a beam. It can be for example a beam with a horizontal flat cut-off or with a projection. Alternatively, the first light beam allows
• the second light beam is advantageously, in combination with the first light beam, a road-type automotive lighting beam (in English "high-beam"), and for example a segmented road-type beam.
• the second light beam can also be a complementary beam participating in the formation of a beam of the code type or of the advantageously segmented road type.
• the optical system can include a projection lens or one or more mirrors.
• the first and second reflecting surfaces are formed on the same manifold.
• the second reflecting surface is segmented transversely to the optical axis so as to form adjacent bands of reflecting surface, the second light source comprising several individually activatable light areas extending transversely and associated with said bands. adjacent reflective surface.
• the second reflecting surface comprises a rear edge forming a horizontal cut-off of the second beam.
• the optical system comprises a focal point located on the second reflecting surface or at a distance from said second reflecting surface of less than 10mm.
• the focal point of the optical system is located on the rear edge of the second reflecting surface or at a distance from said rear edge of less than 10mm.
• each of the first and second reflecting surfaces has an elliptical or parabolic profile.
• the light module further comprises an optical concentration device disposed optically between the second light source and the second reflecting surface, and configured to concentrate the light rays emitted by said second light source towards a rear edge of the second reflective surface.
• the optical focusing device is advantageously a lens or a series of lenses when the second light source comprises a series of individually activatable light zones.
• the first reflecting surface has an elliptical profile with a first focal point corresponding to the first light source and a second focal point, said light module further comprising an auxiliary reflecting surface with a front edge located at said second focus, said front edge forming a horizontal cut-off edge, with or without a projection, of the first beam.
• the auxiliary reflecting surface is advantageously flat. This is a folder. It is advantageously parallel to, or aligned with, the optical axis.
• the rear edge of the second reflecting surface is adjacent to, or coincides with, the front edge of the auxiliary reflecting surface, forming the horizontal cut-off edge, with or without projection, of the first beam.
• said light module further comprises a third light source capable of emitting light rays, and a third reflecting surface adjacent to, and to the front of the second reflecting surface, configured to collect and reflecting the light rays emitted by said third light source into a third light beam along the optical axis.
• the third light beam advantageously complements the second light beam so as to form, in combination with the first light beam, a automotive lighting beam of the road type (in English "high-beam"), and for example of the segmented road type.
• the third reflecting surface comprises a rear edge forming a horizontal cut-off of the third beam.
• the third reflecting surface is segmented transversely to the optical axis so as to form adjacent bands of reflecting surface, the third light source comprising several individually activatable light areas extending transversely and associated with said bands. adjacent reflective surface.
• the first reflecting surface is adjacent to and behind the second reflecting surface, and the optical system is configured to also form an image of the first reflecting surface.
• the first and second light beams complement each other to form, in combination with a cut-off light beam formed by another module, a road-type automotive lighting beam (in English "high-beam”), and for example a segmented road-type beam.
• a road-type automotive lighting beam in English "high-beam”
• segmented road-type beam for example
• the first reflecting surface is segmented transversely to the optical axis so as to form adjacent bands of reflecting surface, the first light source comprising several individually activatable light areas extending transversely and associated with said bands. adjacent reflective surface.
• the measures of the invention are advantageous in that they make it possible to produce with a single module several beams with horizontal cut-off, the module remaining compact, in particular in height, and simple to produce.
• By imaging an illuminated reflective surface with sufficient depth of field it is possible to obtain a sharp projected light image and hence also to achieve sharp cuts by means of the edges of the surface in question.
• the fact of being in Gaussian conditions, namely rays slightly inclined with respect to the optical axis and not far from said axis has the consequence that the lens forming the projection system can be a thin lens, for example with a thickness less than 6mm, which allows it to be produced in a single plastic injection.
• FIG 1 is a principle longitudinal sectional view of a light module according to a first embodiment of the invention
• FIG 2 is a perspective view of the second reflecting surface and the second light source of the light module of Fig 1;
• FIG 3 is a graphical representation of the light image of the light beams produced by the light module of Figure 1;
• FIG 4 is a principle longitudinal sectional view of a light module according to a second embodiment of the invention.
• FIG 5 is a perspective view of the reflecting surfaces and the second and third light sources of the light module of Fig 4;
• FIG 6 is a graphical representation of the light image of the light beams produced by the light module of Figure 4.
• FIG 7 is a principle longitudinal sectional view of a light module according to a third embodiment of the invention.
• FIG 8 is a perspective view of the reflecting surfaces and light sources of the light module of Fig 7;
• FIG 9 is a graphical representation of the light image of the light beams produced by the light module of Figure 7;
• front and rear are to be understood with respect to a main direction of propagation of the light, namely along the optical axis, from the light source (s) to an optical system of light. projection.
• Figures 1 to 3 illustrate a light module according to a first embodiment of the invention.
• Figure 1 is a schematic longitudinal sectional view of the light module.
• the light module 2 comprises a first light source 4 and a first reflecting surface 6 configured to collect the light rays emitted by the first light source 4 and reflect them to form a first light beam.
• the first reflecting surface preferably has an elliptical profile and is advantageously a surface of revolution of said profile so as to form a concave shape, in this case a cap or half-shell. It is however understood that the first reflecting surface is not necessarily a surface of revolution; it can deviate from such a conformation, in particular to correct certain aberrations and / or to modify the light beam somewhat.
• An auxiliary reflecting surface 8, commonly called a folder, is disposed in front of the first reflecting surface 6, with a leading edge 10 located at a focal point of said surface and forming a cut-off edge.
• the first light source 4 is located at another focal point of the first reflecting surface 6. The light rays emitted by the first light source 4 are thus essentially collected and reflected towards the cut-off edge.
• the light beams which meet the folder 8 at the rear of the cut-off edge 10 are reflected upwards.
• the folder 8 is advantageously planar and aligned with an optical axis 12 of the light module 2.
• a projection lens 14, forming an optical projection system, is arranged at the front on the optical axis 12. It is configured to deflect them.
• the latter has a horizontal cutoff defined by the cut edge 10.
• the cutoff horizontal may have a projection at the level of the optical axis, in order to achieve a cut commonly referred to as “kink” (English term designating a projection).
• the cut edge 10 is not rectilinear but has a projection. Such configurations are per se known to those skilled in the art and do not require further explanation.
• the light module 2 comprises a second light source 18 and a second reflecting surface 20 configured to collect the light rays emitted by the second light source 18 and reflect them to form a second light beam.
• the second light source 18 is offset axially with respect to the first light source 4. More specifically, the second light source 18 is located in front of the first light source 4.
• the two sources lights 4 and 18 illuminate in the same direction, in this case vertically downward considering the orientation of Figure 1 where the optical axis is horizontal. In the present case, the two light sources 4 and 18 are at the same distance from the optical axis 12 but this may not be the case.
• the second reflecting surface 20 advantageously has a profile of the elliptical or parabolic type. It is advantageously a surface of revolution about an axis parallel to, or coincident with, the optical axis. Alternatively, it can be a free form surface or a swept surface or an asymmetric surface. It can also include several sectors or segments.
• parabolic type applies generally to reflectors the surface of which has a single focal point, that is to say a zone of convergence of light rays such as the light rays emitted by a light source placed at the center. level of this convergence zone are projected at great distance after reflection on the surface. Projected at a great distance means that these light rays do not converge on an area that is at least 10 times the dimensions of the reflector. In other words, the reflected rays do not converge towards a convergence zone or, if they converge, this convergence zone is located at a distance greater than or equal to 10 times the dimensions of the reflector.
• a parabolic type surface may or may not have parabolic portions.
• a reflector having such a surface is generally used alone to create a light beam.
• it can be used as a projection surface associated with an elliptical type reflector.
• the light source of the parabolic type reflector is the zone of convergence of the rays reflected by the elliptical type reflector.
• the light source 18 is disposed at a focal point of the second reflecting surface 20 so that its rays are collected and reflected along the optical axis 12.
• the projection lens 14 has a focal point 14.1 which is advantageously located along the optical axis 12, at the height of the second light source 18 or, in this case, behind said source.
• the focus 14.1 is located at the level of the second reflecting surface 20 or near the latter, of preferably less than 10mm, preferably less than 5mm.
• the projection lens 14 has a sufficient depth of field to obtain a stigmatism of at least part of the second reflecting surface 20.
• the depth of field of the projection lens 14 is at least 30%, advantageously the entire extent, along the optical axis, of the second reflecting surface 20
• the projection lens 14 is advantageously said to be thin, for example less than 6mm. This is possible when the spokes to be deflected have a slight inclination. To this end, at least part of these reflected rays may have angles of inclination ⁇ in a vertical plane with respect to said axis which are less than or equal to 25 °, preferably less than or equal to 10 °, so as to be under the so-called Gaussian conditions. These are advantageously the rays reflected by the rear part of the second reflecting surface 20.
• the projection lens 14 then images the second reflecting surface 20 when the latter is illuminated, more particularly the portion of the reflecting surface closest to the focus 14.1.
• the latter is located on the rear edge 20.1 of the second reflecting surface 20 so as to image the edge in question.
• the focus 14.1 is located at a distance from the rear edge 20.1, namely in front of said edge, in order to vertically widen the second light beam.
• the fact of imaging with a certain precision the rear edge 20.1 of the second reflecting surface 20 makes it possible to achieve a lower horizontal cut-off in the second light beam 22.
• the second reflecting surface 20 has a front edge 20.2 which will define the upper limit of the beam. second light beam 22.
• the first and second reflecting surfaces 6 and 20 and the auxiliary reflecting surface 8 (the folder) can be formed on the same support forming a collector 24.
• the collector 24 in the form of a shell or cap is advantageously made of materials exhibiting good heat resistance, for example glass or synthetic polymers such as polycarbonate PC or polyetherimide PEI.
• FIG. 2 illustrates in perspective the second light source 18 and the second reflecting surface 20.
• the light source 18 comprises several light zones 18.1 on a support 18.2, said zones being individually activatable. It may be several light emitting diodes 18.1 arranged on a plate 18.2 of the printed circuit type.
• the second reflective surface 20 is segmented transversely to the optical axis so as to form bands of reflective surface 20.3 adjacent step by step.
• Each of the reflective surface strips 20.3 has a cross section forming a hollow profile.
• each of the reflective surface strips 20.3 has two side edges 20.4 at the borders with the directly adjacent reflective surface strips 20.3.
• Each strip of reflective surface 20.3 corresponds to a luminous zone 18.1 and vice versa.
• a specific light zone 18.1 When a specific light zone 18.1 is activated and emits light rays, these mainly illuminate the corresponding reflective surface strip 20.3. They can also illuminate neighboring reflective surface bands 20.3 but with angles which are not favorable to a concentration of light along the optical axis or at least with limited angles of inclination with respect to said axis. These rays, once reflected, will partly disperse. This means that the side edges 20.4 form side cuts in the second bundle.
• FIG. 3 schematically illustrates the light images of the first and second light beams 16 and 22.
• the first beam 16 produced by the first light source 4, the first reflecting surface 6, the auxiliary reflecting surface and the lens of projection 14 is a beam with an upper horizontal cutoff, in this case along the neutral horizontal axis H. It can thus be a lighting beam of the code type (commonly called "low beam") or d 'part of such a beam.
• the second light beam 22 is formed an addition of sub-beams each corresponding to one of the light zones of the second light source and to the corresponding reflective surface strip. These sub-beams are adjacent laterally.
• the second light beam 22 can be, in combination with the first beam 16, a lighting beam of the road type (commonly called "high-beam” in English) of the segmented type, that is to say that can be modulated transversely by activating the useful light zones of the second light source.
• Figures 4 to 6 illustrate a second embodiment of the invention.
• the reference numbers of the first embodiment are used to designate identical or corresponding elements, these numbers however being increased by 100. Reference is also made to the description of these elements in relation to the first embodiment. Specific elements are designated by specific numbers between 100 and 200.
• the second embodiment differs from the first embodiment essentially in the presence of a third light source and a third reflecting surface forming a third light beam.
• FIG. 4 is a schematic view in longitudinal section of a light module according to the second embodiment.
• the light module 102 comprises, similarly to the first embodiment, a first light source 104, an associated first reflecting surface 106 and an associated auxiliary reflecting surface 108, called a bender, with a cutting leading edge 110 to form a first light beam 116. with upper horizontal cut-off. Similar to the first embodiment, the light module 102 also includes a second light source 118 and a second reflecting surface 120 associated to form a second light beam 122. However, with respect to the first embodiment, the length (along the optical axis) of the second reflecting surface 120 is advantageously shorter, so as to form light images of reduced height, as a complementary beam.
• This second light beam 122 has a lower horizontal cut-off formed essentially by the rear edge 120.1 of the second reflecting surface which is imaged by the projection lens 114.
• the latter is in this case plan-convex, it being understood that others configurations are possible.
• a convergence optical system 126 is optically disposed between the second light source 118 and the second reflecting surface 120. It is configured to concentrate the light rays emitted by the second light source 118 towards the trailing edge 120.1 of the second reflecting surface 120.
• the convergence optical system 126 is in this case a series of lenses arranged opposite each of the light zones of the second light source 118.
• the light module 102 comprises a third light source 128 disposed in front of the second light source 118. It illuminates in the same direction as the first and second light sources, in this case vertically downwards considering the orientation of FIG. 4 where the optical axis 112 is horizontal.
• a third reflecting surface 130 is disposed in front of the second reflecting surface 120, preferably adjacent to said second reflecting surface 120. Similar to the second reflecting surface 120, the third reflecting surface 130 advantageously has a profile of the elliptical or parabolic type. It is advantageously a surface of revolution about an axis parallel to, or coincident with, the optical axis. Alternatively, it can be a free form surface or a swept surface or an asymmetric surface. It can also include several sectors or segments.
• the third light source 128 is arranged at a focal point of the third reflecting surface 130 so that its rays are collected and reflected along the optical axis 112. At least part of these reflected rays may have angles of inclination b in a vertical plane with respect to said axis which are less than or equal to 25 °, preferably less than or equal to 10 °, so as to be under the so-called Gauss conditions. These are advantageously the rays reflected by the part rear of the third reflecting surface 130.
• the third light source 128, the third reflecting surface 130 and the projection lens 114 thus form a third light beam also with a lower horizontal cutoff, located above the second light beam 122.
• the sharpness of the horizontal cuts depends on the positioning of the focal point 114.1 of the projection lens 114. If this is at the rear edge 120.1 of the second reflecting surface 120, or of the month near it. Here, the cut of the second beam 122 will be clear. If it is located more towards the front, at a distance from said rear edge 120.1, the cut-off sharpness of the second beam 122 will decrease, on the other hand the sharpness of the cut-off of the third beam 132 will increase as soon as the distance between the focus and the rear edge 130.1 of the third reflecting surface decreases. As already mentioned in relation to the first embodiment, the sharpness of the horizontal cuts will also depend on the depth of field of the projection lens 114.
• FIG. 5 is a perspective representation of the reflecting surfaces 106, 120 and 130, and of the second and third light sources 118 and 128. It can be seen that each of the second and third light sources 118 and 128 has a series of light zones distributed transversely. , individually activatable, in correspondence with the transverse segmentation of the second and third reflecting surfaces 120 and 130 into reflecting surface bands 120.3 and 130.3.
• the convergence optical system 126 comprises a series of convergence lenses each of which is optically disposed between one of the light zones of the second light source 118 and the corresponding reflective surface strip 120.3 of the second reflective surface 120.
• Fig. 6 schematically illustrates the light images of the first, second and third light beams 116, 122 and 132.
• the first beam 116 is a beam with an upper horizontal cutoff, in this case along the neutral horizontal axis H. It can thus be a lighting beam of the code type (commonly called “low beam”) or part of such a beam.
• the second beam 122 consists of an addition of sub-beams each corresponding to one of the light zones of the second light source and the corresponding reflective surface strip. These sub-beams are laterally adjacent. They have a common lower horizontal cutoff, in this case parallel to the neutral horizontal axis H, on or below said horizontal axis H, produced by the rear edge 120.1 of the second reflecting surface 120 (FIG.
• the second beam 122 makes it possible to complete the first beam 116 in order to form a lighting beam of the code type.
• the selective activation of the sub-beams makes it possible to form an overall beam with a cut-off with a step.
• the selective activation of the sub-beams makes it possible to move the position of the jump according to the bends taken by the vehicle, and thus to achieve a dynamic bend lighting function (also called DBL for Dynamic Bending Light).
• the third light beam 132 is similar to the second light beam 122, except that it is located above the latter and has a greater height.
• the sub-beams of the second and third beams are in this case aligned but can be transversely shifted.
• the second and third light beams 122 and 132 can be, in combination with the first beam 116, a lighting beam of the road type (commonly called "high-beam") of the segmented type, that is to say transversely modular. by activating the useful light zones of the second and third light sources.
• Figures 7 to 9 illustrate a third embodiment of the invention.
• the reference numbers of the second embodiment are used to designate identical or corresponding elements, these numbers however being increased by 100. Reference is also made to the description of these elements in relation to the second embodiment.
• the third embodiment has a similarity with the second embodiment and differs from it essentially in the absence of the first light beam with upper horizontal cut-off and of the components that produce it.
• the second and third light beams of the second embodiment then become the first and second light beams of the third embodiment.
• FIG. 7 is a schematic longitudinal sectional view of a light module according to the third embodiment of the invention.
• the light module 202 includes a first light source 218 and an associated first reflective surface 220 configured to collect and reflect light rays along the optical axis 212 where at least a portion of these reflected rays have tilt angles ⁇ in a plane. vertical with respect to said axis which are less than or equal to 25 °, preferably less than or equal to 10 °, so as to be under the so-called Gaussian conditions, making it possible to obtain a stigmatism, that is to say a sharpness of the projected image.
• the first light source 218 and the first reflecting surface 220 then produce with the projection lens 214 a first light beam 222 with a lower horizontal cutoff.
• the light module 202 further comprises a second light source 228 and an associated second reflecting surface 230 configured to collect and reflect light rays along the optical axis 212 where at least a portion of these reflected rays have tilt angles. b in a vertical plane with respect to said axis which are less than or equal to 25 °, preferably less than or equal to 10 °, so as to also be under the so-called Gauss conditions.
• the second light source 228 and the second reflecting surface 220 then produce with the projection lens 214 a second light beam 232 with lower horizontal cutoff, located above the first light beam 222.
• the sharpness of the horizontal cuts depends on the positioning of the focus 214.1 of the projection lens 214. If the latter is at the rear edge 220.1 of the first reflecting surface 220, or at least close to that here, the cut of the first beam 222 will be clear. If it is located more towards the front, at a distance from said rear edge 220.1, the cut-off sharpness of the first beam 222 will decrease, on the other hand the sharpness of the cut-off of the second beam 132 will increase as soon as the distance between the focus and the rear edge 130.1 of the second reflecting surface decreases.
• FIG. 8 is a perspective representation of the reflecting surfaces 220 and 230, and of the second and third light sources 118 and 128.
• each of the second and third light sources 118 and 128 has a series of light zones distributed transversely, which can be activated individually, in correspondence with the transverse segmentation of the second and third reflecting surfaces 220 and 230 into reflective surface bands 220.3 and 230.3.
• FIG. 9 schematically illustrates the light images of the first and second light beams 222 and 232.
• the first beam 122 consists of an addition of sub-beams each corresponding to one of the light zones of the first light source and to the strip corresponding reflective surface. These sub-beams are adjacent laterally. They have a common lower horizontal cutoff, in this case parallel to the neutral horizontal axis H and on or below said axis, made by the rear edge 220.1 of the first reflective surface 220 ( Figure 7). They also have a common upper horizontal cutout produced by the front edge 220.2 of the first reflecting surface 220 (FIG. 7).
• the second light beam 232 is similar to the first light beam 222, except that it is located above it and has a greater height.
• the sub-beams of the first and second beams are in this case aligned but can be transversely shifted.
• the first beam 222 can, in combination with an upper horizontal cutoff beam, produce a code type illumination beam. The selective activation of the sub-beams makes it possible to form an overall beam with a cut-off with a step.
• the first and second light beams 222 and 232 can produce, in combination with a beam with a higher horizontal cut-off produced by another module, a road-type lighting beam (commonly called "high-beam") of the matrix type, that is, that is to say adjustable transversely by activating the useful light zones of the second and third light sources.
• high-beam road-type lighting beam

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• Non-Portable Lighting Devices Or Systems Thereof (AREA)

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• 2019
  • 2019-11-19 FR FR1912908A patent/FR3103253B1/fr active Active
• 2020
  • 2020-11-18 WO PCT/EP2020/082607 patent/WO2021099430A1/fr unknown
  • 2020-11-18 US US17/777,799 patent/US11959610B2/en active Active
  • 2020-11-18 EP EP20808114.1A patent/EP4062098A1/fr active Pending
  • 2020-11-18 CN CN202080093904.7A patent/CN114981590A/zh active Pending

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