EP3147557A1 - Primäres optisches element für kraftfahrzeugsbeleuchtungsmodul - Google Patents

Primäres optisches element für kraftfahrzeugsbeleuchtungsmodul Download PDF

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Publication number
EP3147557A1
EP3147557A1 EP16189922.4A EP16189922A EP3147557A1 EP 3147557 A1 EP3147557 A1 EP 3147557A1 EP 16189922 A EP16189922 A EP 16189922A EP 3147557 A1 EP3147557 A1 EP 3147557A1
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EP
European Patent Office
Prior art keywords
primary optical
primary
optical means
light
optical element
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Granted
Application number
EP16189922.4A
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English (en)
French (fr)
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EP3147557B1 (de
Inventor
Kostadin BEEV
Marine Courcier
Vanesa Sanchez
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Valeo Vision SAS
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Valeo Vision SAS
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Publication of EP3147557A1 publication Critical patent/EP3147557A1/de
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Classifications

    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • 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
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • 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
    • F21S41/60—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
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Definitions

  • the invention relates to the field of lighting and / or signaling, especially for motor vehicles. It relates more particularly to a projector light module and a primary optical element associated in this module.
  • a motor vehicle is equipped with projectors, or headlights, intended to illuminate the road in front of the vehicle, at night or in case of reduced brightness, by a global light beam.
  • projectors or headlights
  • These projectors, a left projector and a straight projector comprise one or more light modules adapted to generate and direct an intermediate light beam whose addition forms said overall light beam.
  • These projectors can generally be used in two lighting modes: a first "high beam” mode producing a Route beam and a second "low beam” mode producing a Code beam.
  • the “high beam” mode provides strong illumination of the road far ahead of the vehicle.
  • the “low beam” mode provides more limited illumination of the road, but still offers good visibility without dazzling other road users.
  • the two lighting modes, “high beam” and “low beam” are complementary, and we switch from one to another depending on traffic conditions. It is known to make the high beam beam by addition of the beam Code and a complementary beam, joined the beam Code at the cutoff edge.
  • the beam Code is generated by the only ignition means specific to the second mode "dipped beam” while the beam Route is generated by the simultaneous ignition means specific to the second mode "dipped beam” and means specific to the first mode " Redlights ".
  • Such an ADB function consists of on the one hand automatically detecting a user of the road likely to be dazzled by a beam of light emitted in high beam mode by a projector, and on the other hand automatically modifying the contour of this lighting beam so as to create a shadow zone at the location of the detected user, without manual intervention of the driver of the vehicle.
  • the advantages of the ADB function are multiple: comfort of use, better visibility compared to a lighting in dipped beam mode, better reliability for the change of mode, risk of dazzling greatly reduced, driving safer.
  • the shape and arrangement of the guides relative to each other in a module of a projector must be very precise in order firstly to be able to produce an intermediate beam at the output of the module that is homogeneous and smoothed when all the segments are lit, and for the other hand to have a complementary intermediate beam of the intermediate beam produced at the output of the other projector.
  • a primary optical element monobloc adapted to integrate into a light module further comprising a projection system, said primary optical element having guides integrally with a planar face arranged in a ball whose opposite face is substantially spherical, the ball forming in particular a correction portion to improve the optical efficiency of the system and to correct the aberrations of the light module.
  • the present invention is part of a context of optimization of these matrix lights as well as in the context of the multiplication of the lighting functions that one can offer users, and among which we can for example identify the high-speed lighting function, or highway, (function called “Motorway Light” in English), in which the intensity of the beam is increased around the optical axis of the projector to increase the lighting range, or the rainy weather function (AWT function for "Adverse Weather Light” in English), in which the beam of low beam is controlled so that the Reflection of the light from the searchlights on the wet road is not dazzling.
  • DBL Dynamic Bending Light
  • the invention is part of this context and it aims at providing a primary optical element for a motor vehicle lighting module, comprising a light introduction part provided with a plurality of primary optical means connected at output to a light source. corrective part, said primary optical means being arranged on two levels in a first direction, here a vertical direction, in first and second distinct primary optical means, a plurality of first primary optical means being arranged in series in a second direction, here transverse substantially perpendicular to the first direction.
  • the corrective part as it has just been presented makes it possible to improve the optical efficiency of the light module and, on the other hand, it makes it possible to correct the optical aberrations of the optical system and thus to ensure good quality imaging.
  • the primary optical element according to the invention is advantageously monobloc. At least the first primary optical means and the corrective part form an assembly that can not be undone without causing the degradation of one or the other. More so, the second primary optical means can form a one-piece structure with said corrective part and said first primary optical means. In order to obtain this one-piece arrangement, it is possible to make all of the components of this primary optical element in one piece, in particular by molding, or to relate one of these components, for example the secondary optical medium. It is notable that, in order to facilitate the transmission of light rays through the introduction portion and the corrective portion, and not to generate deviation of the rays when passing one from the other, the respective refractive indices of the means primary optics and the corrective part may be substantially identical. And in this context and a complementary advantage to facilitate obtaining, in particular by molding, the monobloc structure, the primary optical means and the corrective part may be made of the same material, and they may be from the same polymer.
  • the or each second primary optical means is intended to receive a second primary light beam of a second primary light source disposed opposite its light entry face and that it is arranged to shape this second primary light beam so that the projection of this second primary light beam on the road has an upper cutoff.
  • the second primary optical means may be arranged so that the upper cutoff is a flat cut, or alternatively has at least one oblique cutting portion.
  • the primary optical means can take different forms without departing from the context of the invention, provided that they respect the floor arrangement of two distinct series, which can also take different forms from one series to another .
  • these primary optical means may consist of light guides or take the form of microlenses, pads or collimators.
  • the invention also relates to an optical assembly comprising the primary optical element as described above and a plurality of primary light sources, a first primary light source being respectively associated with each of the primary optical means in series while a second source primary is associated with each of the convex shapes, or each of the optical profiles of the second primary optical means.
  • the primary light sources are mounted on a support extending as much opposite the first primary optical means as the second primary optical means.
  • the support is not flat but that it can have an inclined shape to be facing light guides not necessarily arranged in the same vertical plane.
  • the invention further relates to a motor vehicle headlamp light module, which comprises a plurality of primary light sources, a primary optical element as discussed above and an associated secondary optical element.
  • the different primary optical means of the primary optical element can be arranged on the primary optical element so that the outputs of the primary optical means are positioned in the vicinity of a focal surface object of a projection system formed by the primary optical element and the secondary optical element while the output of the primary optical means is offset longitudinally with respect to this object focal surface.
  • the distance between the primary optical element and the secondary optical element is strictly greater than zero.
  • a light module according to the invention in which a primary optical element carries staged primary optical means able to be compared with series of light sources.
  • primary light allows with a single means to achieve a plurality of optical functions, among which include a function called DBL (Dynamic Bending Light in English for mobile lighting of turn) or a function called AWL (Adverse Weather Light in English, for fire bad weather). It will be possible to easily achieve one and / or the other of these functions by a modulation of the light intensity emitted by the primary light sources facing the primary optical means.
  • DBL Dynamic Bending Light in English for mobile lighting of turn
  • AWL Adverse Weather Light in English, for fire bad weather
  • the invention also relates to a motor vehicle headlamp comprising at least one light module as just presented.
  • the lighting module comprises a plurality of primary light sources, arranged in two distinct series superposed in a first direction, here vertically one above the other, a series of first primary light sources 1 (visible in particular on the figure 2 ) is here arranged in a series of second sources of primary lights 2.
  • the module further comprises a primary optical element 3 and a secondary optical projection element 4, having an optical axis A 1 .
  • the front and rear of the module are defined by the direction of the arrow representative of the longitudinal direction of the trihedron L, V, T of the figure 1 .
  • the first and second primary light sources 1 and 2 are, in the particular example described here, light-emitting diodes, or LEDs. However, the light-emitting diodes could be replaced by other light sources without departing from the context of the invention. These primary light sources 1 and 2 are carried by the same support 5 (visible on the figure 5 ), which limits the number of parts of the light module.
  • the primary optical element 3 comprises a corrective part 6 and a light-introducing part 7 through which the light rays emitted by the first and second primary light sources 1 and 2 penetrate into the primary optical element and then be led through in the corrective part.
  • the light-introducing part 7 comprises in stepped arrangement, that is to say one above the other in the first direction here vertical, on the one hand a plurality of first primary optical means 8, here light guides, also called waveguides or optical guides, respectively associated with the first primary light sources 1, and secondly a second primary optical means 9, here a single light guide forming a strip of material extending in a second direction, here transversely, in a continuous manner and disposed to the plumb first guides 8 and a rear face 90 of which, opposite the corrective part 6, is arranged facing the second primary light sources 2.
  • two types of primary optical means are connected to the same corrective part 6 transmitting the light towards a secondary optical element 4.
  • a first type consists of a plurality of first primary optical means 8, substantially separated from each other and arranged in series in the second transverse direction, while the second type consists of a second single primary optical means 9 formed by a strip of material which extends substantially over the entire length of the series of first primary optical means 8.
  • the separated nature of the first primary optical means 8 and the continuous character of the second primary optical means 9 are distinguished by the fact that two first primary optical means 8 contiguous are spaced from each other over at least half of their longitudinal dimension. The fact that they are substantially separated from each other means for junctions of the primary optical means with machining and / or injection rays due to the constraints of methods of producing the primary optical element.
  • At least one of the two types of primary optical means form with the corrective part 6 a monobloc structure.
  • monobloc structure is meant that the elements of the structure are not separable without destruction of at least one of the elements.
  • the first primary optical means in series were integral with the corrective part 6 and the second primary optical means 9 was attached to the rear face of the corrective part and made integral with it, but it is understood that the light introduction part 7 in its entirety (here, with the first primary optical means in series 8 and the second primary optical medium in band 9) may be made of material for with the corrective part 6 to form a monoblock structure .
  • the first and second primary optical means are arranged on either side of the optical axis of the module, and the junction between these first and second primary optical means can pass, as is visible on the figure 5 , by this optical axis.
  • the primary optical means are constituted by light guides
  • these primary optical means may be constituted, in particular in the part for generating a beam Code, by microlenses, pad or pins. collimators.
  • collimators it is possible to provide revolution collimators or horizontal collimators, ie collimators having horizontally a collimator profile that has been extruded in a vertical curve. Thereafter, will be designated by light guide any primary optical medium.
  • the corrective portion 6 is a sphere portion, or a ball portion, centered on the exit of one of the first guides. More specifically, in the particular example of figure 1 , the corrective part 6 is a half-ball whose center is situated in the exit plane of this first guide and on the optical axis A 1. In a variant, the exit plane of this first guide could be substantially offset relative to in the center of the sphere a distance of less than or equal to 10% of the radius value of the sphere, preferably along the optical axis.
  • the front surface of the corrective part 6, in particular in the form of a spherical dome or spherical portion, constitutes an outlet front face 61 facing the secondary optical element 4.
  • the rear face 60 of the corrective part 6 extends here in the cutting plane of the half-sphere. It could, however, have any shape, provided to connect with the outputs of the first light guides 8 and the output of the material band forming the second light guide 9 and not to change the path of the rays from the exit ends of the guides and propagating in the corrective part 6.
  • the projection system formed by the corrective part 6 and its outlet face 61 and by the secondary optical projection element 4 defines an object focal surface SF, visible in particular on the Figures 5 and 6 .
  • the shape of the rear face 60 of the corrective portion may be defined so that the exit surface of a first type of guide is disposed substantially on the object focal surface of the deflection system. projection formed by the corrective part 6 and by the secondary optical element 4 and so that the exit surface of the second type of guide is offset longitudinally, that is to say axially along the optical axis, with respect to the focal surface object.
  • the corrective part 6 has a half-ball or half-sphere shape defined by the rear face 60 forming the sectional plane and the substantially spherical outlet face 61.
  • Other embodiments are possible.
  • the corrective part may be a truncated ball portion, that is to say cut off on each side of the spherical portion formed on the exit face.
  • the corrective part 6 may have a slightly deformed half ball shape, in particular with ball portions which extend along a progressive radius of curvature until reaching the rear face 60 of the corrective part 6.
  • the light introduction portion 7 and the corrective portion 6 are made of the same material and have the same refractive index.
  • standard refractive index it is meant that the refractive index of the light-introducing portion 7 and that of the corrective portion 6 are equal to the nearest hundredth.
  • standard material it is meant that the corrective part 6 and the light-introducing part 7, and within it the first light guides 8 separated from each other and the second light guide 9 unique band-shaped, are made of the same material or are derived from the same polymer. If they come from the same polymer, the first and second guides may have a charge different from that of the corrective part 6.
  • the guides may be made of PMMA-HT (from English Polymethyl MethAcrylate High Temperature - high temperature methyl polymethacrylate) with a refractive index of 1.490 and resistant to high temperatures, and the PMMA-8N corrector having a refractive index of 1.491 and less expensive.
  • PMMA-HT from English Polymethyl MethAcrylate High Temperature - high temperature methyl polymethacrylate
  • the PMMA-8N corrector having a refractive index of 1.491 and less expensive.
  • first and second guides are loaded differently, it being understood that it should be ensured that the first light guides 8, individually associated with a first primary light source, are resistant to high temperatures.
  • the material constituting the corrective part 6 on the one hand, and the first light guides 8 and the second strip-shaped guide 9 forming the light-introducing portion 7 on the other hand, is transparent.
  • This is a material for an optical lens, such as an organic material or possibly glass.
  • Each first light guide 8 extends along a longitudinal axis and has at each of its longitudinal ends a rear face 80 of light input, disposed opposite one of the first primary light sources 1, and a front output, or output end or output interface, 81 acting as a secondary light source, connected to the corrective part 6. It further comprises, for connecting its two longitudinal end faces, two lateral faces 82, an upper face 84 and a lower face 85.
  • the distance between an output plane of the light source and the input face of the associated first guide is between 0 , 1 millimeters and 1 millimeter.
  • the first light guides 8 and the first primary light sources 1 associated, and arranged opposite the input face, are configured so that the rays emitted by these light sources penetrate into the first corresponding guide by the rear face 80 then propagate inside this first guide towards the exit face 81, possibly by successive internal total reflections on the lower, upper and lateral faces.
  • each first light guide 8 (that is to say transverse to the optical axis of the guide) here has a generally parallelogram shape, and more precisely a rectangle.
  • the cross section of the first guides could be of any shape. It could for example include curved sides. In any case, it is adapted to produce a desired form of light beam at the output of the light module.
  • the outputs 81 of the first light guides 8, here rectangular, are secondary light sources for producing respective light beams at the output of the light module. These light beams have generally rectangular shapes in cross section (that is to say transverse to the optical axis A 1 ).
  • the first guides 8 are juxtaposed and form, arranged at regular intervals, a horizontal row so that secondary light sources are virtually arranged in series on the rear face of the corrective part, substantially on the focal surface object of the projection system, to be projected to infinity in this segmented arrangement.
  • each of the first guides 8 is a curved surface generally having a cylindrical portion shape of substantially ellipsoidal generator. This has the effect of concentrating the light intensity in the upper part of the beam coming out of the first guide 8, which corresponds to a zone (called “range zone”) located in the bottom of the matrix beam produced at the output of the light module and which corresponds to the cut-off area at the junction with the product code beam at the output of the optical module by the interaction of the second primary light sources and the associated second light guide 9.
  • range zone located in the bottom of the matrix beam produced at the output of the light module and which corresponds to the cut-off area at the junction with the product code beam at the output of the optical module by the interaction of the second primary light sources and the associated second light guide 9.
  • the lower faces 85 of the first light guides 8 are spreading faces shaped so as to widen the cross section of these first guides, continuously, from its inlet face to its exit face, each first guide flaring down from its entrance to its exit.
  • the lower faces 85 are here curved and have a flared shape. Alternatively, they could be flat and inclined relative to the longitudinal axis of the first guides.
  • the lower or lower flare of each first guide allows a vertical downward spread of the secondary light source 81 at the output of the first guide, which corresponds to an upward spread of the corresponding region of the beam.
  • the second light guide 9 is a single guide extending over substantially the entire transverse dimension of the primary optical element 3. Unlike the first light guides which consist of a plurality of independently independent guides and guiding the only the light rays emitted by the light source associated with them, the second light guide has the shape of a single continuous strip of material from one transverse side to the other of the primary optical element.
  • the second light guide 9 comprises two vertical end faces, one of which faces the first light guides and a rear face 90 of light entry, arranged opposite a series of second primary light sources 2 , said rear face 90 being opposite a front exit, or output end or exit interface, 91 acting as a secondary light source, connected to the corrective part 6.
  • the light input rear face 90 has a transverse succession of convex shapes, here having a regular boss shape 92, so that the rear face of the second light guide has a shape corrugated.
  • This undulating shape is oriented so that the center of each boss is turned away from the corrective part 6, in the direction of a rimpedement of the light sources.
  • Each boss is arranged opposite one of the plurality of second primary light sources 2, these sources and the second light guide being configured and mounted facing each other so that the optical axis of a second primary light source 2 is centered on the middle of one of the bosses 92.
  • the bosses are arranged in transverse series so that the end edges 93 of the bosses are joined in pairs, and it is known to define a secondary input face 94 of this second primary optical means, identified as the surface connecting one after the other end edges 93 of the bosses.
  • each second primary optical means comprises a junction portion 95 with the correcting portion 6 and an optical profile 96 installed at a free end of the joining portion, opposite the corrective portion, the joining portions of the second primary optical means forming a common joint portion extending continuously in the second direction.
  • the distance between an output plane of the light source and the input face of the associated second guide is between 0.1 millimeters and 1 millimeter.
  • the second light guides 9 and the second primary light sources 2 associated, and arranged facing the bosses 92 of the input face, are configured so that the rays emitted by these light sources penetrate the second guide corresponding by the rear face 90 and then propagate inside this second guide towards the exit face 91, possibly by successive internal total reflections on an upper face and a lower face 97, turned towards the first light guides 8. It is understood that in the case of the second light guide, the rays emitted by a second primary light source 2 through one of the bosses 92 of the rear face 90 of the ray input can cross, between the secondary entrance face 94 and the exit face 91, with the rays emitted by another second primary light source through another of the bosses.
  • the lower face 97 of the second guide 9 is a curved surface generally having a cylindrical portion shape, substantially in a mirror arrangement with respect to the upper face 84 of the first guides. This has the effect of concentrating the light intensity in the lower part of the beam coming out of the second guide 9, which corresponds to an area located closest to the cutoff at the output of the light module.
  • the spacing of the opposite faces of the first and second guides also contributes to the molding of a single piece to form the primary optical element 3, forming a clearance angle sufficient to demold the part.
  • the first light guides are ten in number and the second light guide 9 has six bosses 92 on its input face 90.
  • ten primary and six second primary light sources Primary light sources are arranged on the common support 5 facing the light guides.
  • these numbers could vary, but preferably be strictly greater than one, and they could be equal so that as many first independent guides would be provided as bosses on the second single guide.
  • an offset can be provided. transversely of the first independent light guides involved in the formation of contiguous regions of the beam, without having to provide a transverse shift of the second single light guide. It is understood that if the first and second light guides can be shifted transversely relative to each other, their staggered arrangement one above the other remains the same.
  • the secondary input face 94 identified as the surface connecting the end edges of the bosses one after the other, is defocused, and the projected image of the resulting secondary light source on the focal surface SF, the junction of the second primary optical means and the corrective part, is homogeneous horizontally due to the mixing of rays emitted by neighboring light sources between the secondary entrance face 94 and the exit face 91.
  • the figure 3 represents the light beam 100 projected at the output of the light module.
  • the ignition of the second primary light sources creates a beam Code and the ignition of all primary light sources, the first and the second, creates a beam Route, with an upper part, likely to dazzle users on the road scene, which is matrix with contiguous regions, for example segments, that can be extinguished selectively to avoid this glare.
  • first light guides 8 comprises a left lateral end guide 8j and a right lateral end guide 8a, in the transverse direction.
  • the left end guide is intended to produce a right light segment.
  • the right end guide is intended to produce a left light segment.
  • the first left end guide 8j may comprise a left lateral face 82 of spreading shaped to widen laterally, continuously, the cross section of the guide from its input face to its output.
  • the left side face 82 may be curved to flare from the rearward entry face 80 of the first left end guide 8j to its exit 81.
  • the lateral widening of the first left end guide 8j allows a spreading side to the left of the secondary light source at the exit of the first left end guide 8j, which here corresponds to a lateral spread to the right of the light segment produced as it appears on the figure 4 .
  • the right edge of the corresponding light segment is softened, the light intensity decreasing laterally to the right gradually.
  • the light module represented on the Figures 1 and 2 is intended to equip a left headlight of a motor vehicle, and that the Figures 3 and 4 correspond to beams made by modules in this left projector.
  • the light module for a right motor vehicle headlight symmetrically comprises a first left end light guide 8a having a flared right side face similar to the left side face of the first left end guide 8j from figure 2 .
  • each of the first guides 8 has the effect of reducing the opening of the light rays emitted by the primary light sources 1 and 2, the rays entering the light guides 8 and 9 being folded by the laws of refraction .
  • the light rays are not deflected due to the connection between the first guides 8 and the corrective part 6. Thanks to this, the reduced opening of the rays is preserved.
  • the light rays issuing from the corrective part 6 by the exit face 61 are not deviated or little deviated thanks to the spheroidal dome shape of the outlet face 61.
  • the half-spherical corrective part 6 being centered on the junction at the output of one of the first guides and the second guide, a ray coming from the plane of exit of this first guide at the optical axis A 1 is normal or almost normal to the output face 61 and is therefore not diverted to the interface between the corrective part 6 and the surrounding air.
  • a ray coming from an area separated from the optical axis is folded towards this optical axis.
  • the refraction at the interface between the corrective part 6 and the surrounding medium (air) is in a way "compensated" by the spherical or substantially spherical shape of the outlet face 61.
  • the corrective part 6 also makes it possible to correct the field aberrations of the optical system and thus ensure good quality imaging:
  • the secondary optical element 4 is here a convergent optical lens having the axis A 1 for an optical axis .
  • the distance separating the corrective part 6 and the secondary optical element 4 is strictly greater than zero and adapted so that the plane in which the outlets of the first light guides extend substantially coincides with the object focal plane of the projection system formed by the secondary optical element 4 and the primary optical element 3.
  • the light module is adapted to create an infinite image of the secondary light sources formed at the exit ends of the guides. It is thus possible to generate several light segments, with good imaging, using a same primary optical element 3 and from the light guides positioned on or outside the optical axis A 1.
  • the half-ball forming the corrective portion 6, by slightly changing the orientation of the rays emitted by the outputs of the guides which are offset with respect to the optical axis A 1 , at the output interface 61, has a field corrector effect.
  • the device according to the invention makes it possible to dispense with relative positioning games between the guides associated with a Code function and a Route function, by the one-piece realization of at least one series of these guides and the corrective part associated with the all these guides.
  • this corrective part 6 a particular arrangement of light guides in that are superimposed two types of distinct guides, arranged in particular differently with respect to the object focal plane of the system. projection formed by the output interface 61 of the corrective part 6 and by the secondary optical element 4.
  • the outputs of the first guides define the secondary images associated with these first guides and are positioned in the object focal surface SF of the projection system , so that the beams emerging from the secondary optical projection element 4 and corresponding to the rays emitted by the first primary light sources, that is to say the sources corresponding to the upper part of the Route beam, are beams parallel rays forming luminous segments of generally rectangular shape.
  • the second primary optical means is arranged with respect to the object focal surface SF of the projection system so that the curve which carries the transverse ends of each of the patterns formed in series on the entry face of the first guide is defocused, upstream of this focal surface object.
  • the light module of the invention has excellent optical efficiency.
  • the luminous flux emitted by the primary light sources undergo little loss in the corrective part and they are recovered largely at the output of the module to create light beams capable of forming light segments on the one hand for the complementary route beam and a global wide beam for the code beam.
  • the light module can produce, with simple means and a corrective part common to the primary light sources, light segments for the complementary beam Route whose shapes are perfectly controlled and a beam Code homogeneously rendered horizontally by the defocusing of the light. web of continuous material for spreading the rays in the corrective part.
  • "Modulations" or “microstructures” type patterns could be added to the surfaces of the secondary optical element 4 to voluntarily add a controlled cut-off blur.
  • a primary optical element carrying staged light guides able to face different sets of primary light sources makes it possible, with a single means, to perform a plurality of optical functions, among which in particular a so-called DBL function.
  • DBL Dynamic Bending Light in English for mobile lighting of turn
  • AWL Automatic Weather Light in English, for fire of bad weather
  • One and / or the other of these functions is easily achieved by modulating the light intensity emitted by the primary light sources facing the light guides. For example, one can progressively, from right to left or from left to right according to the direction of the detected turn, increase the intensity of the light sources to increase the visibility on one side of the overall light beam and thus achieve a function DBL.
  • DBL Dynamic Bending Light in English for mobile lighting of turn
  • AWL Adverse Weather Light in English, for fire of bad weather
  • One and / or the other of these functions is easily achieved by modulating the light intensity emitted by the primary light sources facing the light guides. For example, one can progressively, from right to left or from left to

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP16189922.4A 2015-09-28 2016-09-21 Primäres optisches element für kraftfahrzeugsbeleuchtungsmodul Active EP3147557B1 (de)

Applications Claiming Priority (1)

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FR1559101A FR3041738B1 (fr) 2015-09-28 2015-09-28 Element optique primaire pour module lumineux de vehicule automobile

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EP3147557B1 EP3147557B1 (de) 2020-12-09

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EP3421875A1 (de) * 2017-06-29 2019-01-02 Valeo Vision Leuchtmodul, das ein optisches feldkorrekturelement umfasst
EP3511608A1 (de) * 2018-01-12 2019-07-17 Valeo Vision Optisches modul für ein kraftfahrzeug
EP3517827A1 (de) * 2018-01-29 2019-07-31 Valeo Vision Leuchtmodul, das ein primäres optisches modul umfasst, das mit zwei formgebungsmatten ausgestattet ist
EP3961085A1 (de) * 2020-08-25 2022-03-02 Lumileds LLC Beleuchtungssystem für kfz-scheinwerfer

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FR3072446B1 (fr) * 2017-10-13 2021-06-25 Valeo Vision "module d'eclairage formant un motif lumineux divise en une portion superieure nette et une portion inferieure floue"
JP2019175826A (ja) * 2018-03-29 2019-10-10 パナソニックＩｐマネジメント株式会社 移動体照明装置及び移動体
FR3081969B1 (fr) * 2018-06-01 2021-12-31 Valeo Vision Module lumineux pour vehicule automobile, et dispositif d'eclairage et/ou de signalisation muni d'un tel module
JP7176810B2 (ja) * 2018-06-21 2022-11-22 スタンレー電気株式会社 車両用灯具
FR3084724B1 (fr) * 2018-07-31 2021-04-16 Valeo Vision Module lumineux a quatre parties de guidage
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FR3085463B1 (fr) * 2018-08-31 2022-03-25 Valeo Vision Module lumineux de vehicule automobile comprenant une pluralite de guides de lumiere
WO2020083361A1 (zh) 2018-10-25 2020-04-30 华域视觉科技(上海)有限公司 照明模组、车灯及车辆
CN210740255U (zh) * 2019-06-05 2020-06-12 华域视觉科技(上海)有限公司 一种车灯光学元件、车灯模组、车辆前照灯和车辆
CN210462847U (zh) * 2019-06-05 2020-05-05 华域视觉科技(上海)有限公司 一种车辆前照灯及车辆
CN110207065B (zh) * 2019-06-27 2024-06-28 浙江亮心汽车部件有限公司 一种小型导光式近光投影模组及使用该模组的灯组
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CN212132313U (zh) 2020-03-09 2020-12-11 华域视觉科技(上海)有限公司 车灯光学元件组件、车辆照明装置、车灯和车辆
WO2021244735A1 (en) * 2020-06-03 2021-12-09 HELLA GmbH & Co. KGaA Headlamp for a motor vehicle
CN113883468A (zh) * 2020-07-02 2022-01-04 华域视觉科技(上海)有限公司 一种车灯光学组件、车灯模组、车灯及车辆
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CN112539393B (zh) * 2020-11-16 2021-06-22 复旦大学 一种远光照明装置、车灯和车辆

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EP3421875A1 (de) * 2017-06-29 2019-01-02 Valeo Vision Leuchtmodul, das ein optisches feldkorrekturelement umfasst
FR3068435A1 (fr) * 2017-06-29 2019-01-04 Valeo Vision Module lumineux comportant un element optique de correction de champ
US10823357B2 (en) 2017-06-29 2020-11-03 Valeo Vision Luminous module including a field-correcting optical element
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EP3517827A1 (de) * 2018-01-29 2019-07-31 Valeo Vision Leuchtmodul, das ein primäres optisches modul umfasst, das mit zwei formgebungsmatten ausgestattet ist
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EP3961085A1 (de) * 2020-08-25 2022-03-02 Lumileds LLC Beleuchtungssystem für kfz-scheinwerfer

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CN106969318B (zh) 2021-10-08
EP3147557B1 (de) 2020-12-09
FR3041738A1 (fr) 2017-03-31
US10228108B2 (en) 2019-03-12
US20170089536A1 (en) 2017-03-30
CN106969318A (zh) 2017-07-21
FR3041738B1 (fr) 2020-01-17

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