[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP3315851B1 - Optical module for projecting a cutting light beam having horizontal focusing means - Google Patents

Optical module for projecting a cutting light beam having horizontal focusing means Download PDF

Info

Publication number
EP3315851B1
EP3315851B1 EP17196701.1A EP17196701A EP3315851B1 EP 3315851 B1 EP3315851 B1 EP 3315851B1 EP 17196701 A EP17196701 A EP 17196701A EP 3315851 B1 EP3315851 B1 EP 3315851B1
Authority
EP
European Patent Office
Prior art keywords
cut
optical module
optical
profile
lens
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.)
Active
Application number
EP17196701.1A
Other languages
German (de)
French (fr)
Other versions
EP3315851A1 (en
Inventor
Yves Gromfeld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP3315851A1 publication Critical patent/EP3315851A1/en
Application granted granted Critical
Publication of EP3315851B1 publication Critical patent/EP3315851B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F21S41/334—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
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • 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
    • F21S41/20—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
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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
    • F21S41/26—Elongated 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
    • 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
    • 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
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions

Definitions

  • Certain regulatory lights of motor vehicles such as low beam or fog lights, must project a light beam delimited upwards by a cut-off profile. This cut-off profile is adapted to avoid dazzling the drivers of other vehicles.
  • the cut-off profile extends generally horizontally which limits the range of the beam on the side of the road on which vehicles are likely to travel in the opposite direction, for example on the left in France or on the right in the United Kingdom, while illuminating over a greater range the edge of the road located on the other side.
  • the cutting profile has for example two horizontal stepped bearings which are connected by an inclined intermediate section.
  • the inclination of the intermediate section is for example 15 ° relative to the horizontal.
  • such a lighting module with a narrow outlet face allows designers to produce a vehicle having a visual signature recognizable from a distance.
  • the optical means and the lenses are dioptres formed by internal walls of this block, the material being advantageously chosen so that light rays penetrating into the block via an inlet portion, in particular the lens of entry, propagates in the block by total internal reflection on these diopters to the exit lens.
  • the intermediate cut-off beam is emitted along a main axis coaxial with that of the final beam
  • the invention also relates to a lighting device for a motor vehicle comprising a juxtaposition of several optical modules produced according to the teachings of the invention.
  • a longitudinal transverse plane will be called a "horizontal" plane.
  • the transverse orientation corresponds to the orientation of the horizontal bearing of the cut-off profile of the final light beam.
  • the vertical orientation is used as a geometric reference without reference to the direction of gravity.
  • the vertical orientation is defined as being orthogonal to the horizontal level of the cutoff profile of the final light beam.
  • FIG. 2 It is a final beam 24 having a cut profile 28.
  • the figure 2 illustrates the area illuminated by the final beam 24 on a transverse vertical screen 26 placed 25 meters from the lighting device, perpendicular to the optical axis whose intersection with the screen 26 corresponds to the intersection between the abscissa axis and the ordinate axis.
  • the cut profile 28 has at least a first lower horizontal bearing 28A and a second oblique section 28B which extends the first horizontal bearing 28A.
  • This oblique section 28B is inclined at an angle ⁇ determined with respect to the horizontal bearing, for example 15 °.
  • the final beam 24 is here a regulatory crossing beam.
  • the first horizontal bearing 28A makes it possible to avoid dazzling the drivers of vehicles traveling in the opposite direction.
  • the cutoff profile 28 is here adapted for a vehicle traveling in a country which requires vehicles to drive to the right of the road.
  • the cutting profile 28 here comprises a second upper horizontal bearing 28C which extends the oblique section 28B on the side opposite the first lower horizontal bearing 28A.
  • the invention provides an optical module 22 having a narrow outlet face 30 having a transverse dimension much less than its vertical dimension, as illustrated in FIG. figure 3 representing a device 32 for front lighting of the vehicle 20.
  • Such an optical module 22 comprises a controlled light source 34 emitting an initial beam 46. It is for example a semiconductor chip comprising a light emitting surface. Such a light emitting chip is better known by its English acronym “LED” meaning “light emitting diode” or “Light Emitting Diode”.
  • the optical module 22 also comprises optical cut-off means 36 for transforming the initial beam 46 into an intermediate cut-off beam 48 in which the light rays are distributed vertically below said cut-off profile, the intermediate cut-off beam being emitted according to a main longitudinal axis coaxial with that of the final beam 24.
  • the optical module 22 also comprises optical means 38 for horizontal focusing to focus the intermediate cut-off beam 48 towards a substantially vertical focusing line 54, as well as an output lens 40 having a vertical focal line which is coincident with the focusing line to transform the intermediate beam with cutoff in said final beam.
  • horizontal focusing means that the direction of propagation of the light rays in projection on a longitudinal vertical plane is not substantially deviated by said optical means 38 while the direction of propagation of the light rays in projection on a horizontal plane is deviated towards line of focus 54.
  • This arrangement makes it possible to obtain a final beam 24 in which the cut profile 28 is an image inverted by vertical symmetry of the cut profile of the intermediate beam 48. Since the intermediate beam 48 is focused towards a single vertical line 54 of focus.
  • the fact of focusing the intermediate beam 48 towards the vertical focusing line 54 makes it possible to distribute the light rays in a precise and controlled manner in the final beam 24. This makes it possible in particular to control the distribution of the light intensity in the final beam 24.
  • the cutting means 36 and the focusing means 38 are formed by separate elements.
  • the light source 34 is a chip which has a light emitting surface 44A of rectangular shape as illustrated in the figure 6 .
  • the light-emitting surface 44 is thus delimited vertically by a transverse lower edge 44A and by a transverse upper edge 44B.
  • the light source 34 is arranged so as to emit an initial light beam 46 in a longitudinal direction oriented towards the front. To this end, the emitting surface 44 of light is thus arranged vertically transversely and facing forward.
  • the initial light beam 46 more particularly has a main emission axis substantially coaxial with a main emission axis of the final beam 24.
  • the cutting means 36 are arranged directly in front of the light source 34 so as to conform all the light rays of the initial beam 46 into an intermediate cutting beam 48 having a cutting profile symmetrical to the cutting profile of the final beam 24 with respect to to a central vertical axis.
  • the cutting means 36 comprise an input lens 42 which is shaped to transform at least a first part of the initial beam 46 into at least a first part of the intermediate beam comprising at least one horizontal section of the cutting profile.
  • a focus object of the lens 42 is arranged substantially on the lower edge 44A of the light-emitting surface 44.
  • the input lens 42 is focused on the lower rectilinear edge 44A of the emitting surface 44.
  • the light rays emitted by the lower edge 44A form collimated light rays which are substantially longitudinal in the intermediate beam 48. This is illustrated by the radius r1 illustrated in the figure 4 .
  • the light rays r2 from the rest of the emitting surface 44 are distributed in the intermediate beam 48 below the rays r1 from the bottom edge.
  • a clear image of the lower edge 44A of the light-emitting surface 44 is thus formed in the intermediate beam 48 to form said horizontal section of the cut profile 28.
  • Certain light rays of the initial beam 46 are not collected by the input lens 42. These light rays pass around the lens 42 without being deflected.
  • the cutting means 36 have a reflecting surface 50 which receives these uncollected rays of the initial beam to produce at least a second part of the intermediate beam comprising at least a second section of the cutting profile 28.
  • the reflection surface 50 is a complex surface divided into zones of distinct shapes each making it possible to produce part of the intermediate beam.
  • a first zone 50A of the reflection surface is focused on the upper edge 44B of the light-emitting surface 44.
  • the light rays emitted by the upper edge 44B form collimated light rays which are substantially longitudinal in the intermediate beam 48. This is illustrated by the radius r3 illustrated in the figure 4 .
  • the light rays from the rest of the emitting surface 44 are distributed by the area 50A below the rays r3 from the upper edge 44B in the intermediate beam 48.
  • the image of the upper edge 44B is rotated by 15 ° around the longitudinal axis to form the oblique section 28B of the cutting profile 28.
  • At least one second zone 50B of the reflection surface is focused on the upper edge 44B of the light-emitting surface 44 to form a horizontal section of the cut profile 28.
  • the reflection surface 50 comprises two zones 50B arranged vertically on either side of the first reflection zone 50A.
  • the light rays emitted by the upper edge 44B form collimated light rays which are substantially longitudinal in the intermediate beam 48.
  • the light rays coming from the rest of the emitting surface 44 are distributed by the area 50B below the rays coming from the upper edge 44B in the intermediate beam 48.
  • the sharp image of this upper edge 44B thus forms a horizontal section of the cutting profile 28.
  • the input lens 42 and the reflecting surface 50 are shaped so as to collimate light rays of the intermediate beam 48 in a horizontal plane.
  • the focusing means 38 are here formed by a convergent cylindrical lens 52 which is interposed on the path of the intermediate beam 48.
  • This lens 52 is designed to leave the distribution of the light rays unchanged in a longitudinal vertical plane, as indicated in FIG. figure 4 , and to focus the light rays of the intermediate beam 48 towards a vertical line 54 of focus as indicated in the figure 5 .
  • the converging lens 52 has a cylindrical shape of vertical rectilinear director.
  • the output lens 40 is interposed on the intermediate beam 48, longitudinally in front of the vertical focusing line 54.
  • the output lens 40 is designed to form the final beam 24 by spreading the intermediate beam 48 horizontally after focusing on the focusing line 54, as illustrated in FIG. figure 5 , while remaining neutral for the vertical distribution of light rays, as illustrated in figure 4 .
  • the exit lens 40 has an exit face 30 generated by a rectilinear vertical director moved on a curved horizontal generatrix.
  • the horizontal generator has a focal point arranged on the focusing line 54.
  • the outlet face 30 has, in horizontal section, a shape suitable for spreading the light rays on either side of the main emission axis.
  • the outlet face 30 has for example an ellipsoidal shape.
  • This arrangement advantageously makes it possible to obtain an outlet lens 40 having an outlet face 30 whose vertical height is substantially greater than its transverse width, as illustrated in FIG. figure 3 .
  • this arrangement makes it possible to obtain a clean cut profile 38 making it possible to comply as well as possible with the regulations in force.
  • the optical cut-off means are produced by other known arrangements, for example by means of a reflector and a cover, a free edge of which makes it possible to form the cut-off profile.
  • the optical cut-off means and the focusing means are formed by the same elements. This advantageously makes it possible to obtain an optical module 22 less bulky longitudinally.
  • the optical module 22 includes a light source 34 identical to that described in the first embodiment.
  • the optical module 22 also includes an input lens 42 and a complex reflection surface 50 which make it possible to obtain an intermediate cut-off beam 48 whose light rays are distributed in a vertical plane in an identical manner to what has been described for the first embodiment. This was illustrated in the figure 7 .
  • the input lens 42 simultaneously forms an optical cut-off means and an optical focusing means. It is thus shaped to focus the light rays of the intermediate beam 48 directly towards the vertical focusing line 54 as illustrated in the figure 8 .
  • the input lens 42 has for example a focal line coincident with the focusing line 54.
  • the reflecting surface 50 simultaneously forms an optical cut-off means and an optical focusing means.
  • the entire reflection surface 50 focuses the light rays of the intermediate beam 48 directly towards the vertical line of focus 54 as illustrated in the figure 8 .
  • each zone 50A, 50B of the reflection surface 50 has a focal line coincident with the vertical line 54 of focus.
  • the output lens 40 is identical to that which has been described in the first embodiment.
  • This second embodiment makes it possible to eliminate the converging lens 52 from the first embodiment.
  • the optical module 22 thus takes up little space longitudinally.
  • the optical module 22 thus obtained is particularly compact.
  • block 58 is inexpensive to manufacture.
  • the mounting of the optical module 22 in a vehicle lighting device 32 is particularly easy and rapid because the optical module 22 comprises only two parts, namely the block 58 and the light source 34.
  • the input lens 42 is formed by a rear input face of the block 58 which is arranged opposite the light source 34.
  • the reflection surface 50 is formed by a face radially delimiting the block 58 of the optical module 22 and forming a diopter. This reflection surface 50 allows the total reflection of the light rays coming from the light source 34.
  • the reflection surface 50 may be aluminized at least in part to allow the reflection of all of the light rays coming from the light source 34.
  • the input lens 42 forms a first input lens 42 which is circumscribed by a second annular input lens 56 of the block 58.
  • the second input lens 56 is optically neutral, that is to say that 'It is shaped to allow the light rays from the light source 34 which are not collected by the input lens 42 to enter the block 58 of the optical module 22 without being substantially deflected.
  • the second input neutral lens 56 is thus inserted radially between the first lens 42 and a rear end of the reflecting surface 50.
  • the second neutral input lens 56 has for example a hemispherical shape centered on the light-emitting surface 44.
  • the second neutral lens 56 is thus formed concave in a rear face of the block 58 and it has at its center the first input lens 42.
  • the output lens 40 is formed in one piece with the block 58 in front of the reflecting surface 50.
  • the exit face 30 of the exit lens 40 forms a front end face of the block 58.
  • the block 58 is for example produced by extrusion along a vertical axis of a transparent plastic material.
  • the material is advantageously chosen so that light rays penetrating into the block via the input lens 42 and the neutral surface 56 propagate in the block 58 by total internal reflection on the reflection surface 50 to the lens 40 output
  • the reflection surface is formed by the internal face of a reflector distinct from the input lens and the output lens is formed by a third independent element.
  • the point M is located in the vicinity of the crossing between the horizontal and vertical axes, and corresponds to the point of the beam whose illumination is maximum. This point M is surrounded by increasingly larger closed curves corresponding to less and less strong illuminations. Each curve corresponds to a constant value in lux which decreases from point M outwards. In the case of figure 12 , point M corresponds to 35.7 lux, the first closed curve surrounding M corresponds to 32 lux, then each subsequent curve corresponds to 8 lux less.
  • a single optical module 22 thus makes it possible to produce a regulatory low beam.
  • the vehicle can be equipped with a lighting device comprising a juxtaposition of several lighting modules 22 produced according to the teachings of the invention.
  • Such a juxtaposition can be carried out for aesthetic reasons and / or to be able to obtain a light beam having characteristics adapted to a particular lighting or signaling function.
  • the lighting device 32 comprises two identical optical modules 22.
  • Each optical module 22 comprises a block 58 produced according to the invention.
  • the two optical modules 22 are arranged parallel one next to the other transversely so that their exit faces 30 are substantially in the same transverse vertical plane.
  • These two optical modules 22 are controlled simultaneously to perform the same lighting or signaling function by superimposing their final beams 24.
  • the lighting device 32 comprises two optical modules 22 which are arranged vertically one above the other.
  • the output face 30 of the lower optical module 22 is thus arranged vertically in line with the optical face 30 of the upper optical module 22.
  • the optical module 22 produced according to any one of the embodiments of the invention thus makes it possible to project a beam with a clear cut by an exit face which is narrow transversely and elongated vertically. Such an optical module takes up little space transversely.
  • the invention makes it possible to obtain a longitudinally compact optical module.
  • optical module produced in a block according to the invention is particularly simple to manufacture and inexpensive.

Landscapes

  • 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)

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

L'invention concerne un module optique destiné à projeter un faisceau lumineux final présentant un profil de coupure présentant au moins un tronçon horizontal, et comportant :

  • une source lumineuse commandée émettant un faisceau initial ;
  • des moyens optiques de coupure pour transformer le faisceau initial en un faisceau intermédiaire à coupure dans lequel les rayons lumineux sont distribués verticalement au-dessous dudit profil de coupure.
The invention relates to an optical module intended to project a final light beam having a cut-off profile having at least one horizontal section, and comprising:
  • a controlled light source emitting an initial beam;
  • optical cut-off means for transforming the initial beam into an intermediate cut-off beam in which the light rays are distributed vertically below said cut-off profile.

ARRIERE PLAN TECHNIQUE DE L'INVENTIONTECHNICAL BACKGROUND OF THE INVENTION

Certains feux réglementaires de véhicules automobiles, tels que les feux de croisement ou les feux antibrouillards, doivent projeter un faisceau lumineux délimité vers le haut par un profil de coupure. Ce profil de coupure est adapté pour éviter d'éblouir les conducteurs d'autres véhicules.Certain regulatory lights of motor vehicles, such as low beam or fog lights, must project a light beam delimited upwards by a cut-off profile. This cut-off profile is adapted to avoid dazzling the drivers of other vehicles.

Le profil de coupure s'étend globalement horizontalement qui permet de limiter la portée du faisceau du côté de la route sur lequel les véhicules sont susceptibles de circuler en sens inverse, par exemple à gauche en France ou à droite au Royaume-Uni, tout en éclairant sur une plus grande portée le bord de la route situé de l'autre côté.The cut-off profile extends generally horizontally which limits the range of the beam on the side of the road on which vehicles are likely to travel in the opposite direction, for example on the left in France or on the right in the United Kingdom, while illuminating over a greater range the edge of the road located on the other side.

A cet effet, le profil de coupure présente par exemple deux paliers horizontaux étagés qui sont reliés par un tronçon intermédiaire incliné. L'inclinaison du tronçon intermédiaire est par exemple de 15° par rapport à l'horizontale.For this purpose, the cutting profile has for example two horizontal stepped bearings which are connected by an inclined intermediate section. The inclination of the intermediate section is for example 15 ° relative to the horizontal.

Par ailleurs, on cherche à réaliser des modules d'éclairage présentant une face de sortie étroite et allongée verticalement, c'est-à-dire orthogonalement aux paliers horizontaux du profil de coupure. Un tel module d'éclairage permet ainsi de réaliser une fonction de feu d'éclairage ou de signalisation peu encombrante transversalement.Furthermore, it is sought to produce lighting modules having a narrow outlet face and elongated vertically, that is to say orthogonally to the horizontal bearings of the cutting profile. Such a lighting module thus makes it possible to carry out a function of lighting lighting or signaling space-saving transversely.

En outre un tel module d'éclairage à face de sortie étroite permet aux concepteurs de réaliser un véhicule ayant une signature visuelle reconnaissable de loin.In addition, such a lighting module with a narrow outlet face allows designers to produce a vehicle having a visual signature recognizable from a distance.

La demande de brevet FR 2 503 832 décrit un module optique selon le préambule de la revendication 1.The request of patent FR 2 503 832 describes an optical module according to the preamble of claim 1.

BREF RESUME DE L'INVENTIONBRIEF SUMMARY OF THE INVENTION

L'invention propose un module d'éclairage du type décrit précédemment, le module optique comportant :

  • des moyens optiques de focalisation horizontale pour focaliser le faisceau intermédiaire à coupure vers une ligne de focalisation sensiblement verticale ;
  • une lentille de sortie présentant une ligne focale verticale qui est confondue avec la ligne de focalisation pour transformer le faisceau intermédiaire à coupure en ledit faisceau final, caractérisé en qu'il comporte un bloc plein réalisé en une seule pièce de matériau transparent comportant :
  • les moyens optiques de coupure ;
  • les moyens optiques de focalisation ;
  • la lentille de sortie.
The invention proposes a lighting module of the type described above, the optical module comprising:
  • horizontal focusing optical means for focusing the intermediate cut-off beam towards a substantially vertical focusing line;
  • an exit lens having a vertical focal line which coincides with the focus line to transform the intermediate cut-off beam into said final beam, characterized in that it comprises a solid block produced in a single piece of transparent material comprising:
  • the optical cut-off means;
  • the optical focusing means;
  • the output lens.

Par exemple, les moyens optiques et les lentilles sont des dioptres formés par des parois intérieures de ce bloc, le matériau étant avantageusement choisi de sorte à ce que des rayons lumineux pénétrant dans le bloc via une portion d'entrée, notamment la lentille d'entrée, se propage dans le bloc par réflexion interne totale sur ces dioptres jusqu'à la lentille de sortie.For example, the optical means and the lenses are dioptres formed by internal walls of this block, the material being advantageously chosen so that light rays penetrating into the block via an inlet portion, in particular the lens of entry, propagates in the block by total internal reflection on these diopters to the exit lens.

Dans un exemple de réalisation de l'invention, le faisceau intermédiaire à coupure est émis selon un axe principal coaxial à celui du faisceau finalIn an exemplary embodiment of the invention, the intermediate cut-off beam is emitted along a main axis coaxial with that of the final beam

Selon d'autres caractéristiques du module d'éclairage :

  • la source lumineuse est une puce à semi-conducteur comportant une surface émettrice de lumière comportant au moins un bord inférieur rectiligne ;
  • le module optique comporte une lentille d'entrée formant un moyen optique de coupure et qui est conformée pour transformer au moins une première partie du faisceau initial en au moins une première partie du faisceau intermédiaire comportant au moins un tronçon horizontal du profil de coupure ;
  • la lentille d'entrée est avantageusement agencée pour collimater les rayons dans plan vertical longitudinal et pour focaliser les rayons dans un plan horizontal vers la ligne focale verticale ;
  • la lentille d'entrée est focalisée sur le bord rectiligne inférieur de la surface émettrice, l'image nette de ce bord inférieur formant tout ou partie dudit tronçon horizontal du profil de coupure ;
  • la lentille d'entrée forme un moyen optique de focalisation en focalisant les rayons lumineux vers la ligne verticale de focalisation, par exemple la lentille d'entrée présente une ligne focale confondue avec la ligne verticale de focalisation ;
  • la source lumineuse est une puce à semi-conducteur comportant une surface émettrice de lumière comportant au moins un bord supérieur horizontal
  • le module optique comporte une surface de réflexion formant un moyen optique de coupure et qui reçoit au moins une deuxième partie des rayons du faisceau initial pour réaliser au moins une deuxième partie du faisceau intermédiaire comportant au moins un tronçon du profil de coupure ;
  • selon un exemple de réalisation, le module comporte une deuxième lentille d'entrée pour recevoir ladite deuxième partie des rayons du faisceau initial. Par exemple, la première et la deuxième lentilles d'entrée forment une portion d'entrée du faisceau initial dans le module, les première et deuxième parties des rayons lumineux formant la totalité du faisceau initial reçu par cette portion d'entrée. La deuxième lentille d'entrée est par exemple une lentille neutre optiquement, par exemple sphérique et centrée sur le milieu de la puce.
  • la surface de réflexion est divisée en zones de formes distinctes permettant chacune de réaliser une partie du faisceau intermédiaire ;
  • au moins une première zone de la surface de réflexion est focalisée sur le bord supérieur de la surface émettrice pour former un tronçon oblique du profil de coupure, l'image nette de ce bord supérieur formant ledit tronçon oblique du profil de coupure;
  • au moins une deuxième zone de la surface de réflexion est focalisée sur le bord supérieur de la surface émettrice pour former un tronçon horizontal du profil de coupure, l'image nette de ce bord supérieur formant ledit tronçon horizontal du profil de coupure;
  • la surface de réflexion forme un moyen optique de focalisation, la totalité de la surface de réflexion focalisant les rayons lumineux vers la ligne verticale de focalisation, chaque zone comportant ainsi une ligne focale confondue avec la ligne verticale de focalisation ;
  • la lentille de sortie est conçue pour former le faisceau final en étalant le faisceau intermédiaire horizontalement après focalisation sur la ligne de focalisation tout en demeurant neutre pour la distribution verticale des rayons lumineux ;
  • la lentille de sortie comporte une face de sortie présentant une hauteur verticale sensiblement supérieure à sa largeur transversale ;
  • la lentille de sortie comporte une face de sortie générée par une directrice verticale rectiligne déplacée sur une génératrice horizontale courbe ;
  • la génératrice horizontale présente un foyer agencé sur la ligne de focalisation ;
  • le faisceau final est un faisceau de croisement réglementaire.
According to other characteristics of the lighting module:
  • the light source is a semiconductor chip comprising a light emitting surface comprising at least one straight bottom edge;
  • the optical module comprises an input lens forming an optical cut-off means and which is shaped to transform at least a first part of the initial beam into at at least a first part of the intermediate beam comprising at least one horizontal section of the cutoff profile;
  • the input lens is advantageously arranged to collimate the rays in a longitudinal vertical plane and to focus the rays in a horizontal plane towards the vertical focal line;
  • the input lens is focused on the lower rectilinear edge of the emitting surface, the sharp image of this lower edge forming all or part of said horizontal section of the cutting profile;
  • the input lens forms an optical focusing means by focusing the light rays towards the vertical line of focus, for example the input lens has a focal line coincident with the vertical line of focus;
  • the light source is a semiconductor chip comprising a light emitting surface comprising at least one horizontal upper edge
  • the optical module comprises a reflection surface forming an optical cut-off means and which receives at least a second part of the rays of the initial beam to produce at least a second part of the intermediate beam comprising at least one section of the cut-off profile;
  • according to an exemplary embodiment, the module comprises a second input lens for receiving said second part of the rays of the initial beam. For example, the first and second entry lenses form an entry portion of the initial beam into the module, the first and second portions of the light rays forming the entire initial beam received by this entry portion. The second input lens is for example an optically neutral lens, for example spherical and centered on the middle of the chip.
  • the reflection surface is divided into zones of distinct shapes, each making it possible to produce part of the intermediate beam;
  • at least a first zone of the reflection surface is focused on the upper edge of the emitting surface to form an oblique section of the cut profile, the sharp image of this upper edge forming said oblique section of the cut profile;
  • at least one second zone of the reflection surface is focused on the upper edge of the emitting surface to form a horizontal section of the cut profile, the sharp image of this upper edge forming said horizontal section of the cut profile;
  • the reflection surface forms an optical focusing means, the entire reflection surface focusing the light rays towards the vertical line of focus, each zone thus comprising a focal line coincident with the vertical line of focus;
  • the output lens is designed to form the final beam by spreading the intermediate beam horizontally after focusing on the focus line while remaining neutral for the vertical distribution of the light rays;
  • the exit lens has an exit face having a vertical height substantially greater than its transverse width;
  • the output lens has an output face generated by a rectilinear vertical director moved on a curved horizontal generator;
  • the horizontal generator has a focal point arranged on the line of focus;
  • the final beam is a regulatory crossing beam.

L'invention concerne aussi un dispositif d'éclairage pour un véhicule automobile comportant une juxtaposition de plusieurs modules optiques réalisés selon les enseignements de l'invention.The invention also relates to a lighting device for a motor vehicle comprising a juxtaposition of several optical modules produced according to the teachings of the invention.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres caractéristiques et avantages de l'invention apparaitront au cours de la lecture de la description détaillée qui va suivre pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :

  • la figure 1 est une vue de côté qui représente schématiquement un véhicule équipé d'un module optique réalisé selon les enseignements de l'invention projetant un faisceau lumineux final vers un écran situé à distance du véhicule ;
  • la figure 2 est une vue de face qui représente une face de l'écran comportant une zone éclairée par le faisceau lumineux final, ladite zone éclairée étant délimitée par un profil de coupure;
  • la figure 3 est une vue de face qui représente schématiquement un dispositif d'éclairage avant du véhicule automobile comportant un module optique réalisé selon les enseignements de l'invention ;
  • la figure 4 est une vue en coupe longitudinale verticale selon le plan de coupe 4-4 de la figure 5 passant par un axe optique du module optique qui représente le module optique réalisé selon un premier mode de réalisation, non couvert par les revendications ;
  • la figure 5 est une vue en coupe horizontale selon le plan de coupe 5-5 de la figure 4 passant par un axe optique du module optique qui représente le module optique réalisé selon le premier mode de réalisation ;
  • la figure 6 est une vue de face à plus grande échelle qui représente schématiquement la source lumineuse du module optique ;
  • la figure 7 est une vue similaire à celle de la figure 4 qui représente un deuxième mode de réalisation du module optique ;
  • la figure 8 est une vue similaire à celle de la figure 5 qui représente un deuxième mode de réalisation du module optique ;
  • les figures 9 et 10 sont des vues en perspective sous différents points de vue qui représentent le module optique selon le deuxième mode de réalisation comportant un bloc réunissant en une seule pièces les moyens de coupure, les moyens de focalisation et la lentille de sortie ;
  • la figure 11 est une vue de détail à plus grande échelle du bloc de la figure 9 qui représente la lentille d'entrée circonscrite par une lentille neutre d'entrée ;
  • la figure 12 est une vue similaire à celle de la figure 2 qui représente les courbes isolux de la zone éclairée par le faisceau final projeté par le module optique réalisé selon le deuxième mode de réalisation ;
  • la figure 13 est une vue en perspective qui représente un dispositif d'éclairage comportant une juxtaposition de deux modules optiques agencés parallèlement ;
  • la figure 14 est une vue en perspective qui représente un dispositif d'éclairage comportant une juxtaposition de deux modules optiques alignés verticalement.
Other characteristics and advantages of the invention will appear during the reading of the detailed description which will follow for the understanding of which reference will be made to the appended drawings in which:
  • the figure 1 is a side view which schematically represents a vehicle equipped with an optical module produced according to the teachings of the invention projecting a final light beam towards a screen located at a distance from the vehicle;
  • the figure 2 is a front view which represents a face of the screen comprising an area illuminated by the final light beam, said illuminated area being delimited by a cut-off profile;
  • the figure 3 is a front view which schematically represents a front lighting device of the motor vehicle comprising an optical module produced according to the teachings of the invention;
  • the figure 4 is a view in vertical longitudinal section along the cutting plane 4-4 of the figure 5 passing through an axis optics of the optical module which represents the optical module produced according to a first embodiment, not covered by the claims;
  • the figure 5 is a horizontal section view along the section plane 5-5 of the figure 4 passing through an optical axis of the optical module which represents the optical module produced according to the first embodiment;
  • the figure 6 is a front view on a larger scale which schematically represents the light source of the optical module;
  • the figure 7 is a view similar to that of the figure 4 which represents a second embodiment of the optical module;
  • the figure 8 is a view similar to that of the figure 5 which represents a second embodiment of the optical module;
  • the Figures 9 and 10 are perspective views from different points of view which represent the optical module according to the second embodiment comprising a block uniting in one piece the cutting means, the focusing means and the output lens;
  • the figure 11 is an enlarged detail view of the block of the figure 9 which represents the input lens circumscribed by a neutral input lens;
  • the figure 12 is a view similar to that of the figure 2 which represents the isolux curves of the area illuminated by the final beam projected by the optical module produced according to the second embodiment;
  • the figure 13 is a perspective view which represents a lighting device comprising a juxtaposition of two optical modules arranged in parallel;
  • the figure 14 is a perspective view which represents a lighting device comprising a juxtaposition of two optical modules aligned vertically.

DESCRIPTION DETAILLEE DES FIGURESDETAILED DESCRIPTION OF THE FIGURES

Dans la suite de la description, on adoptera à titre non limitatif des orientations :

  • longitudinale dirigée d'arrière en avant selon le sens de sortie du faisceau lumineux final ;
  • verticale dirigée de bas en haut ;
  • transversale dirigée orthogonalement aux directions longitudinale et verticale.
In the following description, guidelines will be adopted without limitation:
  • longitudinal directed from back to front in the direction of exit of the final light beam;
  • vertical directed from bottom to top;
  • transverse directed orthogonally to the longitudinal and vertical directions.

Un plan transversal longitudinal sera appelé plan "horizontal".A longitudinal transverse plane will be called a "horizontal" plane.

L'orientation transversale correspond à l'orientation du palier horizontal du profil de coupure du faisceau lumineux final. L'orientation verticale est utilisée à titre de repère géométrique sans référence à la direction de la gravité. L'orientation verticale est définie comme étant orthogonale au palier horizontal du profil de coupure du faisceau lumineux final.The transverse orientation corresponds to the orientation of the horizontal bearing of the cut-off profile of the final light beam. The vertical orientation is used as a geometric reference without reference to the direction of gravity. The vertical orientation is defined as being orthogonal to the horizontal level of the cutoff profile of the final light beam.

Dans la suite de la description, des éléments présentant une même structure ou des fonctions analogues seront désignés par des mêmes références.In the following description, elements having the same structure or similar functions will be designated by the same references.

On a représenté à la figure 1 un véhicule 20 automobile équipé d'un module 22 optique réalisé selon les enseignements de l'invention projetant un faisceau 24 lumineux final longitudinalement vers l'avant.We represented at the figure 1 a motor vehicle 20 equipped with an optical module 22 produced according to the teachings of the invention projecting a final light beam 24 longitudinally forward.

Il s'agit d'un faisceau 24 final présentant un profil de coupure 28. La figure 2 illustre la zone éclairée par le faisceau 24 final sur un écran 26 vertical transversal placé à 25 mètres du dispositif d'éclairage, perpendiculairement à l'axe optique dont l'intersection avec l'écran 26 correspond au croisement entre l'axe des abscisses et l'axe des ordonnées.It is a final beam 24 having a cut profile 28. The figure 2 illustrates the area illuminated by the final beam 24 on a transverse vertical screen 26 placed 25 meters from the lighting device, perpendicular to the optical axis whose intersection with the screen 26 corresponds to the intersection between the abscissa axis and the ordinate axis.

On observe que la zone éclairée par le faisceau 24 final est délimitée vers le haut par un profil de coupure 28. Le profil de coupure 28 présente au moins un premier palier 28A horizontal inférieur et un deuxième tronçon 28B oblique qui prolonge le premier palier 28A horizontal. Ce tronçon 28B oblique est incliné d'un angle α déterminé par rapport au palier horizontal, par exemple de 15°.It can be seen that the area illuminated by the final beam 24 is delimited upwards by a cut profile 28. The cut profile 28 has at least a first lower horizontal bearing 28A and a second oblique section 28B which extends the first horizontal bearing 28A. This oblique section 28B is inclined at an angle α determined with respect to the horizontal bearing, for example 15 °.

Le faisceau 24 final est ici un faisceau de croisement réglementaire.The final beam 24 is here a regulatory crossing beam.

Le premier palier 28A horizontal permet d'éviter d'éblouir les conducteurs des véhicules roulant en sens inverse. Le profil de coupure 28 est ici adapté pour un véhicule roulant dans un pays imposant aux véhicules de rouler à droite de la route.The first horizontal bearing 28A makes it possible to avoid dazzling the drivers of vehicles traveling in the opposite direction. The cutoff profile 28 is here adapted for a vehicle traveling in a country which requires vehicles to drive to the right of the road.

Le profil de coupure 28 comporte ici un deuxième palier 28C horizontal supérieur qui prolonge le tronçon 28B oblique du côté opposé au premier palier 28A horizontal inférieur.The cutting profile 28 here comprises a second upper horizontal bearing 28C which extends the oblique section 28B on the side opposite the first lower horizontal bearing 28A.

On comprendra que ce profil de coupure 28 est donné à titre d'exemple non limitatif.It will be understood that this cutoff profile 28 is given by way of nonlimiting example.

Pour obtenir un tel faisceau 24 final à coupure, l'invention propose un module 22 optique présentant une face 30 de sortie étroite présentant une dimension transversale très inférieure à sa dimension verticale, comme cela est illustré à la figure 3 représentant un dispositif 32 d'éclairage avant du véhicule 20.To obtain such a final cut-off beam 24, the invention provides an optical module 22 having a narrow outlet face 30 having a transverse dimension much less than its vertical dimension, as illustrated in FIG. figure 3 representing a device 32 for front lighting of the vehicle 20.

Un tel module 22 optique comporte une source 34 lumineuse commandée émettant un faisceau 46 initial. Il s'agit par exemple d'une puce à semi-conducteur comportant une surface émettrice de lumière. Une telle puce émettrice de lumière est plus connue sous son acronyme anglosaxon "LED" signifiant "diode électroluminescente" ou "Light Emitting Diode".Such an optical module 22 comprises a controlled light source 34 emitting an initial beam 46. It is for example a semiconductor chip comprising a light emitting surface. Such a light emitting chip is better known by its English acronym "LED" meaning "light emitting diode" or "Light Emitting Diode".

Le module 22 optique comporte aussi des moyens 36 optiques de coupure pour transformer le faisceau 46 initial en un faisceau 48 intermédiaire à coupure dans lequel les rayons lumineux sont distribués verticalement au-dessous dudit profil de coupure, le faisceau intermédiaire à coupure étant émis selon un axe principal longitudinal coaxial à celui du faisceau 24 final.The optical module 22 also comprises optical cut-off means 36 for transforming the initial beam 46 into an intermediate cut-off beam 48 in which the light rays are distributed vertically below said cut-off profile, the intermediate cut-off beam being emitted according to a main longitudinal axis coaxial with that of the final beam 24.

Pour permettre d'obtenir un faisceau 24 final à coupure présentant un profil de coupure 28 net, le module 22 optique comporte aussi des moyens 38 optiques de focalisation horizontale pour focaliser le faisceau 48 intermédiaire à coupure vers une ligne 54 de focalisation sensiblement verticale, ainsi qu'une lentille 40 de sortie présentant une ligne focale verticale qui est confondue avec la ligne de focalisation pour transformer le faisceau intermédiaire à coupure en ledit faisceau final.In order to obtain a final cut-off beam 24 having a clear cut-off profile 28, the optical module 22 also comprises optical means 38 for horizontal focusing to focus the intermediate cut-off beam 48 towards a substantially vertical focusing line 54, as well as an output lens 40 having a vertical focal line which is coincident with the focusing line to transform the intermediate beam with cutoff in said final beam.

Le terme "focalisation horizontale" signifie que la direction de propagation des rayons lumineux en projection sur un plan vertical longitudinal n'est sensiblement pas déviée par lesdits moyens 38 optiques tandis que la direction de propagation des rayons lumineux en projection sur un plan horizontal est déviée vers la ligne 54 de focalisation.The term "horizontal focusing" means that the direction of propagation of the light rays in projection on a longitudinal vertical plane is not substantially deviated by said optical means 38 while the direction of propagation of the light rays in projection on a horizontal plane is deviated towards line of focus 54.

Cet agencement permet d'obtenir un faisceau 24 final dans lequel le profil de coupure 28 est une image inversée par symétrie verticale du profil de coupure du faisceau 48 intermédiaire. Etant donné que le faisceau 48 intermédiaire est focalisé vers une unique ligne 54 verticale de focalisation.This arrangement makes it possible to obtain a final beam 24 in which the cut profile 28 is an image inverted by vertical symmetry of the cut profile of the intermediate beam 48. Since the intermediate beam 48 is focused towards a single vertical line 54 of focus.

En outre le fait de focaliser le faisceau 48 intermédiaire vers la ligne 54 verticale de focalisation permet de distribuer de manière précise et maîtrisée les rayons lumineux dans le faisceau 24 final. Ceci permet notamment de maîtriser la distribution de l'intensité lumineuse dans le faisceau 24 final.In addition, the fact of focusing the intermediate beam 48 towards the vertical focusing line 54 makes it possible to distribute the light rays in a precise and controlled manner in the final beam 24. This makes it possible in particular to control the distribution of the light intensity in the final beam 24.

Dans un premier mode de réalisation, non couvert par les revendications, et représenté aux figures 4 et 5, les moyens 36 de coupure et les moyens 38 de focalisation sont formés par des éléments distincts.In a first embodiment, not covered by the claims, and shown in Figures 4 and 5 , the cutting means 36 and the focusing means 38 are formed by separate elements.

La source 34 lumineuse est une puce qui présente une surface 44A émettrice de lumière de forme rectangulaire comme cela est illustré à la figure 6. La surface 44 émettrice de lumière est ainsi délimitée verticalement par un bord 44A inférieur transversal et par un bord 44B supérieur transversal.The light source 34 is a chip which has a light emitting surface 44A of rectangular shape as illustrated in the figure 6 . The light-emitting surface 44 is thus delimited vertically by a transverse lower edge 44A and by a transverse upper edge 44B.

La source 34 lumineuse est agencée de manière à émettre un faisceau 46 lumineux initial dans une direction longitudinale orientée vers l'avant. A cet effet, la surface 44 émettrice de lumière est ainsi agencée verticalement transversalement et tournée vers l'avant. Le faisceau 46 lumineux initial présente plus particulièrement un axe principal d'émission sensiblement coaxial avec un axe principal d'émission du faisceau 24 final.The light source 34 is arranged so as to emit an initial light beam 46 in a longitudinal direction oriented towards the front. To this end, the emitting surface 44 of light is thus arranged vertically transversely and facing forward. The initial light beam 46 more particularly has a main emission axis substantially coaxial with a main emission axis of the final beam 24.

Les moyens 36 de coupure sont agencé directement en avant de la source 34 lumineuse de manière à conformer tous les rayons lumineux du faisceau 46 initial en un faisceau 48 intermédiaire à coupure présentant un profil de coupure symétrique au profil de coupure du faisceau 24 final par rapport à un axe vertical central.The cutting means 36 are arranged directly in front of the light source 34 so as to conform all the light rays of the initial beam 46 into an intermediate cutting beam 48 having a cutting profile symmetrical to the cutting profile of the final beam 24 with respect to to a central vertical axis.

Les moyens 36 de coupure comportent une lentille 42 d'entrée qui est conformée pour transformer au moins une première partie du faisceau 46 initial en au moins une première partie du faisceau intermédiaire comportant au moins un tronçon horizontal du profil de coupure.The cutting means 36 comprise an input lens 42 which is shaped to transform at least a first part of the initial beam 46 into at least a first part of the intermediate beam comprising at least one horizontal section of the cutting profile.

A cet effet, un foyer objet de la lentille 42 est agencé sensiblement sur le bord 44A inférieur de la surface 44 émettrice de lumière. Ainsi, la lentille 42 d'entrée est focalisée sur le bord 44A rectiligne inférieur de la surface 44 émettrice.To this end, a focus object of the lens 42 is arranged substantially on the lower edge 44A of the light-emitting surface 44. Thus, the input lens 42 is focused on the lower rectilinear edge 44A of the emitting surface 44.

Les rayons lumineux émis par le bord 44A inférieur forment des rayons lumineux collimatés sensiblement longitudinaux dans le faisceau 48 intermédiaire. Ceci est illustré par le rayon r1 illustré à la figure 4. Les rayons r2 lumineux issus du reste de la surface 44 émettrice sont distribués dans le faisceau 48 intermédiaire au-dessous des rayons r1 issus de du bord inférieur.The light rays emitted by the lower edge 44A form collimated light rays which are substantially longitudinal in the intermediate beam 48. This is illustrated by the radius r1 illustrated in the figure 4 . The light rays r2 from the rest of the emitting surface 44 are distributed in the intermediate beam 48 below the rays r1 from the bottom edge.

Une image nette du bord 44A inférieur de la surface 44 émettrice de lumière est ainsi formée dans le faisceau 48 intermédiaire pour former ledit tronçon horizontal du profil de coupure 28.A clear image of the lower edge 44A of the light-emitting surface 44 is thus formed in the intermediate beam 48 to form said horizontal section of the cut profile 28.

Certains rayons lumineux du faisceau 46 initial ne sont pas collectés par la lentille 42 d'entrée. Ces rayons lumineux passent autour de la lentille 42 sans être déviés.Certain light rays of the initial beam 46 are not collected by the input lens 42. These light rays pass around the lens 42 without being deflected.

Les moyens 36 de coupure présentent une surface 50 de réflexion qui reçoit ces rayons non collectés du faisceau initial pour réaliser au moins une deuxième partie du faisceau intermédiaire comportant au moins un deuxième tronçon du profil de coupure 28.The cutting means 36 have a reflecting surface 50 which receives these uncollected rays of the initial beam to produce at least a second part of the intermediate beam comprising at least a second section of the cutting profile 28.

La surface 50 de réflexion est une surface complexe divisée en zones de formes distinctes permettant chacune de réaliser une partie du faisceau intermédiaire.The reflection surface 50 is a complex surface divided into zones of distinct shapes each making it possible to produce part of the intermediate beam.

Une première zone 50A de la surface de réflexion est focalisée sur le bord 44B supérieur de la surface 44 émettrice de lumière.A first zone 50A of the reflection surface is focused on the upper edge 44B of the light-emitting surface 44.

Les rayons lumineux émis par le bord 44B supérieur forment des rayons lumineux collimatés sensiblement longitudinaux dans le faisceau 48 intermédiaire. Ceci est illustré par le rayon r3 illustré à la figure 4. Les rayons lumineux issus du reste de la surface 44 émettrice sont distribués par la zone 50A au-dessous des rayons r3 issus du bord 44B supérieur dans le faisceau 48 intermédiaire. En outre, l'image du bord 44B supérieur est tournée de 15° autour de l'axe longitudinal pour former le tronçon 28B oblique du profil de coupure 28.The light rays emitted by the upper edge 44B form collimated light rays which are substantially longitudinal in the intermediate beam 48. This is illustrated by the radius r3 illustrated in the figure 4 . The light rays from the rest of the emitting surface 44 are distributed by the area 50A below the rays r3 from the upper edge 44B in the intermediate beam 48. In addition, the image of the upper edge 44B is rotated by 15 ° around the longitudinal axis to form the oblique section 28B of the cutting profile 28.

Au moins une deuxième zone 50B de la surface de réflexion est focalisée sur le bord 44B supérieur de la surface 44 émettrice de lumière pour former un tronçon horizontal du profil de coupure 28. Dans l'exemple représenté à la figure 4, la surface 50 de réflexion comporte deux zones 50B agencées verticalement de part et d'autre de la première zone 50A de réflexion.At least one second zone 50B of the reflection surface is focused on the upper edge 44B of the light-emitting surface 44 to form a horizontal section of the cut profile 28. In the example shown in figure 4 , the reflection surface 50 comprises two zones 50B arranged vertically on either side of the first reflection zone 50A.

Les rayons lumineux émis par le bord 44B supérieur forment des rayons lumineux collimatés sensiblement longitudinaux dans le faisceau 48 intermédiaire. Les rayons lumineux issus du reste de la surface 44 émettrice sont distribués par la zone 50B au-dessous des rayons issus du bord 44B supérieur dans le faisceau 48 intermédiaire. L'image nette de ce bord 44B supérieur forme ainsi un tronçon horizontal du profil de coupure 28.The light rays emitted by the upper edge 44B form collimated light rays which are substantially longitudinal in the intermediate beam 48. The light rays coming from the rest of the emitting surface 44 are distributed by the area 50B below the rays coming from the upper edge 44B in the intermediate beam 48. The sharp image of this upper edge 44B thus forms a horizontal section of the cutting profile 28.

Comme cela est illustré à la figure 5, la lentille 42 d'entrée et la surface 50 de réflexion sont conformées de manière à collimater des rayons lumineux du faisceau 48 intermédiaire dans un plan horizontal.As illustrated in the figure 5 , the input lens 42 and the reflecting surface 50 are shaped so as to collimate light rays of the intermediate beam 48 in a horizontal plane.

Les moyens 38 de focalisation sont ici formés par une lentille 52 convergente cylindrique qui est interposée sur le trajet du faisceau 48 intermédiaire. Cette lentille 52 est conçue pour laisser inchangée la distribution des rayons lumineux dans un plan vertical longitudinal, comme cela est indiqué à la figure 4, et pour focaliser les rayons lumineux du faisceau 48 intermédiaire vers une ligne 54 verticale de focalisation comme cela est indiqué à la figure 5.The focusing means 38 are here formed by a convergent cylindrical lens 52 which is interposed on the path of the intermediate beam 48. This lens 52 is designed to leave the distribution of the light rays unchanged in a longitudinal vertical plane, as indicated in FIG. figure 4 , and to focus the light rays of the intermediate beam 48 towards a vertical line 54 of focus as indicated in the figure 5 .

A cet effet, la lentille 52 convergente présente une forme cylindrique de directrice rectiligne verticale.To this end, the converging lens 52 has a cylindrical shape of vertical rectilinear director.

La lentille 40 de sortie est interposé sur le faisceau 48 intermédiaire, longitudinalement en avant de la ligne 54 verticale de focalisation. La lentille 40 de sortie est conçue pour former le faisceau 24 final en étalant le faisceau 48 intermédiaire horizontalement après focalisation sur la ligne 54 de focalisation, comme illustré à la figure 5, tout en demeurant neutre pour la distribution verticale des rayons lumineux, comme illustré à la figure 4.The output lens 40 is interposed on the intermediate beam 48, longitudinally in front of the vertical focusing line 54. The output lens 40 is designed to form the final beam 24 by spreading the intermediate beam 48 horizontally after focusing on the focusing line 54, as illustrated in FIG. figure 5 , while remaining neutral for the vertical distribution of light rays, as illustrated in figure 4 .

A cet effet, la lentille 40 de sortie comporte une face 30 de sortie générée par une directrice verticale rectiligne déplacée sur une génératrice horizontale courbe. La génératrice horizontale présente un foyer agencé sur la ligne 54 de focalisation. La face de sortie 30 présente, en section horizontale, une forme adaptée pour étaler les rayons lumineux de part et d'autre de l'axe principal d'émission. La face 30 de sortie présente par exemple une forme ellipsoïdale.To this end, the exit lens 40 has an exit face 30 generated by a rectilinear vertical director moved on a curved horizontal generatrix. The horizontal generator has a focal point arranged on the focusing line 54. The outlet face 30 has, in horizontal section, a shape suitable for spreading the light rays on either side of the main emission axis. The outlet face 30 has for example an ellipsoidal shape.

Cet agencement permet avantageusement d'obtenir une lentille 40 de sortie présentant une face 30 de sortie dont la hauteur verticale est sensiblement supérieure à sa largeur transversale, comme illustré à la figure 3.This arrangement advantageously makes it possible to obtain an outlet lens 40 having an outlet face 30 whose vertical height is substantially greater than its transverse width, as illustrated in FIG. figure 3 .

En outre, cet agencement permet d'obtenir un profil de coupure 38 net permettant de respecter au mieux les réglementations en vigueur.In addition, this arrangement makes it possible to obtain a clean cut profile 38 making it possible to comply as well as possible with the regulations in force.

En variante de ce premier mode de réalisation, les moyens optiques de coupure sont réalisés par d'autres agencements connus, par exemple au moyen d'un réflecteur et d'un cache dont un bord libre permet de former le profil de coupure.As a variant of this first embodiment, the optical cut-off means are produced by other known arrangements, for example by means of a reflector and a cover, a free edge of which makes it possible to form the cut-off profile.

Selon le mode de réalisation de l'invention qui a été représenté aux figure 7 et 8, les moyens optiques de coupure et les moyens de focalisation sont formés par des mêmes éléments. Ceci permet avantageusement d'obtenir un module 22 optique moins encombrant longitudinalement.According to the embodiment of the invention which has been shown in figure 7 and 8 , the optical cut-off means and the focusing means are formed by the same elements. This advantageously makes it possible to obtain an optical module 22 less bulky longitudinally.

Dans ce mode de réalisation, le module 22 optique comporte une source 34 lumineuse identique à celle décrite dans le premier mode de réalisation.In this embodiment, the optical module 22 includes a light source 34 identical to that described in the first embodiment.

Le module 22 optique comporte aussi une lentille 42 d'entrée et une surface 50 complexe de réflexion qui permettent d'obtenir un faisceau 48 intermédiaire à coupure dont les rayons lumineux sont distribués dans un plan vertical de manière identique à ce qui a été décrit pour le premier mode de réalisation. Ceci a été illustré à la figure 7.The optical module 22 also includes an input lens 42 and a complex reflection surface 50 which make it possible to obtain an intermediate cut-off beam 48 whose light rays are distributed in a vertical plane in an identical manner to what has been described for the first embodiment. This was illustrated in the figure 7 .

En revanche, à la différence du premier mode de réalisation, la lentille 42 d'entrée forme simultanément un moyen optique de coupure et un moyen optique de focalisation. Elle est ainsi conformée pour focaliser les rayons lumineux du faisceau 48 intermédiaire directement vers la ligne 54 verticale de focalisation comme cela est illustré à la figure 8. La lentille 42 d'entrée présente par exemple une ligne focale confondue avec la ligne 54 de focalisation.In contrast, unlike the first embodiment, the input lens 42 simultaneously forms an optical cut-off means and an optical focusing means. It is thus shaped to focus the light rays of the intermediate beam 48 directly towards the vertical focusing line 54 as illustrated in the figure 8 . The input lens 42 has for example a focal line coincident with the focusing line 54.

De même, la surface 50 de réflexion forme simultanément un moyen optique de coupure et un moyen optique de focalisation. Ainsi, la totalité de la surface 50 de réflexion focalise les rayons lumineux du faisceau 48 intermédiaire directement vers la ligne 54 verticale de focalisation comme cela est illustré à la figure 8. Ainsi, chaque zone 50A, 50B de la surface 50 de réflexion présente une ligne focale confondue avec la ligne 54 verticale de focalisation.Likewise, the reflecting surface 50 simultaneously forms an optical cut-off means and an optical focusing means. Thus, the entire reflection surface 50 focuses the light rays of the intermediate beam 48 directly towards the vertical line of focus 54 as illustrated in the figure 8 . Thus, each zone 50A, 50B of the reflection surface 50 has a focal line coincident with the vertical line 54 of focus.

La lentille 40 de sortie est identique à celle qui a été décrite dans le premier mode de réalisation.The output lens 40 is identical to that which has been described in the first embodiment.

Ce deuxième mode de réalisation permet de supprimer la lentille 52 convergente du premier mode de réalisation. Le module 22 optique est ainsi peu encombrant longitudinalement.This second embodiment makes it possible to eliminate the converging lens 52 from the first embodiment. The optical module 22 thus takes up little space longitudinally.

En outre, la réalisation simultanée des fonctions de coupure et de focalisation par des mêmes éléments permet de réaliser les différents éléments du module 22 optique en un seul bloc 58 de matériau transparent, à l'exception de la source 34 lumineuse.In addition, the simultaneous realization of the cutting and focusing functions by the same elements makes it possible to produce the different elements of the optical module 22 in a single block 58 of transparent material, with the exception of the light source 34.

Le module 22 optique ainsi obtenu est particulièrement compact. De plus, le bloc 58 est peu onéreux à fabriquer. En outre, le montage du module 22 optique dans un dispositif 32 d'éclairage de véhicule 20 est particulièrement aisé et rapide car le module 22 optique ne comporte que deux pièces, à savoir le bloc 58 et la source 34 lumineuse.The optical module 22 thus obtained is particularly compact. In addition, block 58 is inexpensive to manufacture. In addition, the mounting of the optical module 22 in a vehicle lighting device 32 is particularly easy and rapid because the optical module 22 comprises only two parts, namely the block 58 and the light source 34.

Comme cela est illustré aux figures 9 et 10, dans un tel module 22 optique, la lentille 42 d'entrée est formée par une face arrière d'entrée du bloc 58 qui est agencée en vis-à-vis de la source 34 lumineuse.As illustrated in Figures 9 and 10 , in such an optical module 22, the input lens 42 is formed by a rear input face of the block 58 which is arranged opposite the light source 34.

La surface 50 de réflexion est formée par une face délimitant radialement le bloc 58 du module 22 optique et formant un dioptre. Cette surface 50 de réflexion permet la réflexion totale des rayons lumineux issus de la source 34 lumineuse.The reflection surface 50 is formed by a face radially delimiting the block 58 of the optical module 22 and forming a diopter. This reflection surface 50 allows the total reflection of the light rays coming from the light source 34.

Au besoin, la surface 50 de réflexion pourra être aluminée au moins en partie pour permettre la réflexion de la totalité des rayons lumineux issus de la source 34 lumineuse.If necessary, the reflection surface 50 may be aluminized at least in part to allow the reflection of all of the light rays coming from the light source 34.

Comme cela est représenté à la figure 11, la lentille 42 d'entrée forme une première lentille 42 d'entrée qui est circonscrite par une deuxième lentille 56 annulaire d'entrée du bloc 58. La deuxième lentille 56 d'entrée est neutre optiquement, c'est-à-dire qu'elle est conformée pour permettre aux rayons lumineux issus de la source 34 lumineuse qui ne sont pas collectés par la lentille 42 d'entrée de pénétrer dans le bloc 58 du module 22 optique sans être sensiblement déviés. La deuxième lentille 56 neutre d'entrée est ainsi intercalée radialement entre la première lentille 42 et une extrémité arrière de la surface 50 de réflexion.As shown in the figure 11 , the input lens 42 forms a first input lens 42 which is circumscribed by a second annular input lens 56 of the block 58. The second input lens 56 is optically neutral, that is to say that 'It is shaped to allow the light rays from the light source 34 which are not collected by the input lens 42 to enter the block 58 of the optical module 22 without being substantially deflected. The second input neutral lens 56 is thus inserted radially between the first lens 42 and a rear end of the reflecting surface 50.

La deuxième lentille 56 neutre d'entrée présente par exemple une forme hémisphérique centrée sur la surface 44 émettrice de lumière. La deuxième lentille 56 neutre est ainsi formée de manière concave dans une face arrière du bloc 58 et elle comporte en son centre la première lentille 42 d'entrée.The second neutral input lens 56 has for example a hemispherical shape centered on the light-emitting surface 44. The second neutral lens 56 is thus formed concave in a rear face of the block 58 and it has at its center the first input lens 42.

La lentille 40 de sortie est formée en une pièce avec le bloc 58 en avant de la surface 50 de réflexion. La face 30 de sortie de la lentille 40 de sortie forme une face d'extrémité avant du bloc 58.The output lens 40 is formed in one piece with the block 58 in front of the reflecting surface 50. The exit face 30 of the exit lens 40 forms a front end face of the block 58.

Le bloc 58 est par exemple réalisé par extrusion selon un axe vertical d'un matériau plastique transparent. Le matériau est avantageusement choisi de sorte à ce que des rayons lumineux pénétrant dans le bloc via la lentille 42 d'entrée et la surface 56 neutre se propagent dans le bloc 58 par réflexion interne totale sur la surface 50 de réflexion jusqu'à la lentille 40 de sortieThe block 58 is for example produced by extrusion along a vertical axis of a transparent plastic material. The material is advantageously chosen so that light rays penetrating into the block via the input lens 42 and the neutral surface 56 propagate in the block 58 by total internal reflection on the reflection surface 50 to the lens 40 output

Selon une variante non représentée de ce deuxième mode de réalisation, la surface de réflexion est formée par la face interne d'un réflecteur distinct de la lentille d'entrée et la lentille de sortie est formée par un troisième élément indépendant.According to a variant not shown of this second embodiment, the reflection surface is formed by the internal face of a reflector distinct from the input lens and the output lens is formed by a third independent element.

On a illustré à la figure 12 une zone éclairée sur l'écran 26 de la figure 1 qui représente des courbes isolux.We illustrated in the figure 12 a lit area on screen 26 of the figure 1 which represents isolux curves.

Le point M est situé au voisinage de la croisée entre les axes horizontal et vertical, et correspond au point du faisceau dont l'éclairement est maximal. Ce point M est entouré par des courbes fermées de plus en plus grandes correspondant à des éclairements de moins en moins forts. Chaque courbe correspond à une valeur constante en lux qui décroît du point M vers l'extérieur. Dans le cas de la figure 12, le point M correspond à 35,7 lux, la première courbe fermée entourant M correspond à 32 lux, puis chaque courbe suivante correspond à 8 lux de moins.The point M is located in the vicinity of the crossing between the horizontal and vertical axes, and corresponds to the point of the beam whose illumination is maximum. This point M is surrounded by increasingly larger closed curves corresponding to less and less strong illuminations. Each curve corresponds to a constant value in lux which decreases from point M outwards. In the case of figure 12 , point M corresponds to 35.7 lux, the first closed curve surrounding M corresponds to 32 lux, then each subsequent curve corresponds to 8 lux less.

Ainsi, un seul module 22 optique permet ainsi de réaliser un feu de croisement réglementaire.Thus, a single optical module 22 thus makes it possible to produce a regulatory low beam.

Comme cela est illustré aux figures 13 et 14, le véhicule peut être équipé d'un dispositif d'éclairage comportant une juxtaposition de plusieurs modules 22 d'éclairage réalisés selon les enseignements de l'invention.As illustrated in Figures 13 and 14 , the vehicle can be equipped with a lighting device comprising a juxtaposition of several lighting modules 22 produced according to the teachings of the invention.

Une telle juxtaposition peut être effectuée pour des raisons esthétiques et/ou pour pouvoir obtenir un faisceau lumineux présentant des caractéristiques adaptées à une fonction d'éclairage ou de signalisation particulière.Such a juxtaposition can be carried out for aesthetic reasons and / or to be able to obtain a light beam having characteristics adapted to a particular lighting or signaling function.

Ainsi, comme représenté à la figure 13, le dispositif 32 d'éclairage comporte deux modules 22 optiques identiques. Chaque module 22 optique comporte un bloc 58 réalisé selon l'invention. Les deux modules 22 optiques sont agencés parallèlement l'un à côté de l'autre transversalement de manière que leurs faces 30 de sortie soient sensiblement dans un même plan vertical transversal. Ces deux modules 22 optiques sont commandés simultanément pour réaliser la même fonction d'éclairage ou de signalisation par superposition de leurs faisceaux 24 finaux.So as shown in the figure 13 , the lighting device 32 comprises two identical optical modules 22. Each optical module 22 comprises a block 58 produced according to the invention. The two optical modules 22 are arranged parallel one next to the other transversely so that their exit faces 30 are substantially in the same transverse vertical plane. These two optical modules 22 are controlled simultaneously to perform the same lighting or signaling function by superimposing their final beams 24.

Dans l'exemple représenté à la figure 14, le dispositif 32 d'éclairage comporte deux modules 22 optiques qui sont agencés verticalement l'un au-dessus de l'autre. La face 30 de sortie du module 22 optique inférieur est ainsi agencée verticalement dans le prolongement de la face 30 optique du module 22 optique supérieur.In the example shown in figure 14 , the lighting device 32 comprises two optical modules 22 which are arranged vertically one above the other. The output face 30 of the lower optical module 22 is thus arranged vertically in line with the optical face 30 of the upper optical module 22.

Le module 22 optique réalisé selon l'un quelconque des modes de réalisation de l'invention permet ainsi de projeter un faisceau à coupure nette par une face de sortie étroite transversalement et allongée verticalement. Un tel module optique est peu encombrant transversalement.The optical module 22 produced according to any one of the embodiments of the invention thus makes it possible to project a beam with a clear cut by an exit face which is narrow transversely and elongated vertically. Such an optical module takes up little space transversely.

En outre l'invention permet d'obtenir un module optique peu encombrant longitudinalement.In addition, the invention makes it possible to obtain a longitudinally compact optical module.

De plus, le module optique réalisé en un bloc selon l'invention est particulièrement simple à fabriquer et peu onéreux.In addition, the optical module produced in a block according to the invention is particularly simple to manufacture and inexpensive.

Claims (17)

  1. Optical module (22) for projecting a final light beam (24) having a cut-off profile (28) with at least one horizontal section (28A, 28C) and comprising :
    - a controlled light source (34) emitting an initial beam (46) ;
    - optical cut-off means (36) for transforming the initial beam (46) into an intermediate beam (48) with a cut-off (28) in which the light rays are distributed vertically below said cut-off profile (28) ;
    the optical module (22) comprising :
    - horizontal optical focusing means (38) for focusing the intermediate cut-off beam (48) to a substantially vertical focus line (54) ;
    - an ouput lens (40) having a vertical focus line (54) which is merged with the focus line (54) for transforming the intermediate cut-off beam (48) into said final beam (24),
    characterized in that it comprises a solid block (58) made of a single piece of transparent material comprising :
    - the optical cut-off means (36) ;
    - the optical focusing means (38) ;
    - the ouput lens (40).
  2. Optical module (22) according to the preceding claim, characterized in that the light source (34) is a semiconductor chip having a light-emitting surface (44) with at least one straight lower edge (44A).
  3. Optical module (22) according to the preceding claim, characterized in that it comprises an input lens (42) forming an optical cut-off means (36) and which is shaped so as to transform at least a first part of the initial beam (46) into at least a first part of the intermediate beam (48) comprising at least one horizontal section of the cut-off profile (28).
  4. Optical module (22) according to the preceding claim, characterized in that the input lens (42) is focused on the lower rectilinear edge (44A) of the emitting surface (44), the sharp image of this lower edge (44A) forming all or part of said horizontal section of the cut-off profile (28).
  5. Optical module (22) according to any one of claims 3 or 4, characterized in that the input lens (42) forms an optical focusing means (38) by focusing the light rays towards the vertical focus line (54).
  6. Module (22) according to any one of claims 1 to 5, characterized in that the light source (34) is a semiconductor chip having a light-emitting surface (44) with at least one horizontal upper edge (44B).
  7. Optical module (22) according to the preceding claim, characterized in that it comprises a reflecting surface (50) forming an optical cut-off means (36) and which receives at least a second part of the rays of the initial beam (46) in order to produce at least a second part of the intermediate beam (48) comprising at least one section of the cut-off profile (28).
  8. Optical module (22) according to the preceding claim, characterized in that the reflecting surface (50) is divided into zones (50A, 50B) of distinct shapes each allowing a portion of the intermediate beam (48) to be produced.
  9. Optical module (22) according to the preceding claim, characterized in that at least a first area (50A) of the reflecting surface (50) is focused on the upper edge (44B) of the emitting surface (44) to form an oblique section (28B) of the cut-off profile (28), the sharp image of this upper edge (44B) forming said oblique section (28B) of the cut-off profile (28).
  10. Module (22) according to any one of claims 8 or 9, characterized in that at least a second zone (50B) of the reflecting surface (50) is focused on the upper edge (44B) of the emitting surface (44) to form a horizontal section of the cut-off profile (28), the sharp image of this upper edge (44B) forming said horizontal section of the cut-off profile (28).
  11. Optical module (22) according to any one of claims 7 to 10, characterized in that the reflecting surface (50) forms an optical focusing means (38), the entire reflecting surface (50) focusing the light rays towards the vertical focus line (54).
  12. Optical module (22) according to any one of the preceding claims, characterized in that the ouput lens (40) is designed to form the final beam (24) by spreading the intermediate beam (48) horizontally after focusing on the focus line (54) while remaining neutral for the vertical distribution of the light rays.
  13. Optical module (22) according to the preceding claim, characterized in that the ouput lens (40) comprises an output face (30) having a vertical height substantially greater than its transverse width.
  14. Module (22) according to any one of claims 12 or 13, characterized in that the ouput lens (40) has an output face (30) generated by a rectilinear vertical directrix displaced on a curved horizontal generatrix.
  15. Optical module (22) according to the preceding claim, characterized in that the horizontal generatrix has a focus arranged on the focus line (54).
  16. Optical module (22) according to any of the preceding claims, characterized in that the final beam (24) is a regulation passing beam.
  17. Lighting device (32) for a motor vehicle (20) comprising a juxtaposition of a plurality of optical modules (22) made in accordance with any one of the preceding claims.
EP17196701.1A 2016-10-28 2017-10-16 Optical module for projecting a cutting light beam having horizontal focusing means Active EP3315851B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1660529A FR3058105B1 (en) 2016-10-28 2016-10-28 OPTICAL MODULE FOR PROJECTING A CUT-OFF LIGHT BEAM WITH HORIZONTAL FOCUSING MEANS

Publications (2)

Publication Number Publication Date
EP3315851A1 EP3315851A1 (en) 2018-05-02
EP3315851B1 true EP3315851B1 (en) 2020-04-08

Family

ID=57796579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17196701.1A Active EP3315851B1 (en) 2016-10-28 2017-10-16 Optical module for projecting a cutting light beam having horizontal focusing means

Country Status (4)

Country Link
US (1) US10139057B2 (en)
EP (1) EP3315851B1 (en)
CN (1) CN108019713B (en)
FR (1) FR3058105B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020045674A1 (en) * 2018-08-31 2020-03-05 市光工業株式会社 Vehicle lamp
FR3093789B1 (en) * 2019-03-14 2022-05-27 Valeo Vision LIGHT DEVICE IMAGING THE ILLUMINATED SURFACES OF AT LEAST TWO COLLECTORS
CN212746315U (en) 2020-07-02 2021-03-19 华域视觉科技(上海)有限公司 Lens unit, auxiliary low-beam module, lens, low-beam lighting module and vehicle
US11859787B1 (en) * 2023-02-14 2024-01-02 T.Y.C. Brother Industrial Co., Ltd. Adaptive headlamp device
CN116221647B (en) * 2023-05-08 2023-07-28 常州星宇车灯股份有限公司 Car light high beam lighting system, lighting module and vehicle
CN118346938A (en) * 2024-06-18 2024-07-16 浙江嘀视科技有限公司 Ultra-narrow lens module and car lamp

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1039135A (en) * 1951-06-28 1953-10-05 Phares Auteroche Headlight for motor vehicle or other applications
FR1214367A (en) * 1958-11-14 1960-04-08 Radiation projector
GB1326370A (en) * 1969-12-17 1973-08-08 Lucas Industries Ltd Lighting systems for road vehicles
GB1476297A (en) * 1973-09-29 1977-06-10 Lucas Electrical Ltd Motor vehicle lamp assemblies
FR2503832B1 (en) * 1981-04-14 1986-04-04 Cibie Projecteurs MOTOR VEHICLE PROJECTOR WITH NARROW OUTPUT WINDOW
JPH0225101U (en) * 1988-08-05 1990-02-19
US5068768A (en) * 1990-03-28 1991-11-26 Koito Manufacturing Co., Ltd. Variable light distribution type automobile lamp
DE4307109C2 (en) * 1993-03-06 2003-12-24 Bosch Gmbh Robert Low beam headlights for right and left-hand traffic for motor vehicles
JP4431932B2 (en) * 2001-07-16 2010-03-17 スタンレー電気株式会社 Lamp
FR2853392B1 (en) * 2003-04-04 2006-06-16 Sli Miniature Lighting Sa REAR LIGHT, ESPECIALLY STOP LIGHT FOR MOTOR VEHICLE
WO2005010430A1 (en) * 2003-07-29 2005-02-03 Turhan Alcelik A headlamp with a continuous long-distance illumination without glaring effects
JP2006210296A (en) * 2005-01-31 2006-08-10 Ichikoh Ind Ltd Vehicular lighting fixture and vehicular headlight device
KR100761555B1 (en) * 2006-03-17 2007-09-27 에스엘 주식회사 Lamp shield driving apparatus providing multiple beam pattern, and lamp assembly using the same
FR2910592B1 (en) * 2006-12-20 2012-07-20 Valeo Vision LUMINOUS PROJECTOR MODULE OF A MOTOR VEHICLE FOR A CUT-OFF BEAM
CN102016397B (en) * 2008-04-25 2015-05-13 皇家飞利浦电子股份有限公司 Lamp assembly
CN102812290B (en) * 2010-04-09 2016-08-03 皇家飞利浦电子股份有限公司 There is the luminaire of smooth cut-off
CN102032527A (en) * 2010-09-14 2011-04-27 金展精技工业有限公司 Illuminating beam shaping system
JP5810755B2 (en) * 2011-08-31 2015-11-11 市光工業株式会社 Vehicle headlamp
CN105042469B (en) * 2013-01-30 2018-08-28 上海开腾信号设备有限公司 Ground traffic tools region, which corresponds to, is directed toward light distribution type LED lamp and its manufacturing method
KR102004686B1 (en) * 2013-04-08 2019-07-29 현대모비스 주식회사 Multi-Array LED chip for embodying cut-off line and Head lamp having the same
FR3006517B1 (en) * 2013-06-04 2018-03-02 Valeo Equipements Electriques Moteur ROTATING ELECTRIC MACHINE FOR MOTOR VEHICLE
JP5723417B2 (en) * 2013-06-26 2015-05-27 富士重工業株式会社 Vehicle headlamp
FR3010772A1 (en) * 2013-07-25 2015-03-20 Valeo Vision LIGHT EMITTING DEVICE FOR MOTOR VEHICLE PROJECTOR
JP6274891B2 (en) * 2014-02-03 2018-02-07 株式会社小糸製作所 Vehicle lighting
DE102014203335A1 (en) * 2014-02-25 2015-08-27 Automotive Lighting Reutlingen Gmbh Light module of a motor vehicle headlight and headlights with such a light module
JP6514510B2 (en) * 2015-01-14 2019-05-15 株式会社小糸製作所 Vehicle lamp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN108019713A (en) 2018-05-11
CN108019713B (en) 2021-12-24
FR3058105A1 (en) 2018-05-04
US20180119899A1 (en) 2018-05-03
US10139057B2 (en) 2018-11-27
FR3058105B1 (en) 2021-04-02
EP3315851A1 (en) 2018-05-02

Similar Documents

Publication Publication Date Title
EP3315851B1 (en) Optical module for projecting a cutting light beam having horizontal focusing means
EP3301348B1 (en) Lighting device in strips for motor vehicle headlight
EP3290777B1 (en) Optical module for illuminating overhead signs
EP3604910B1 (en) Optical part comprising a block with a dioptre forming a folding machine for two beams
EP3124854B1 (en) Lighting system for motor vehicle headlight
FR3047541B1 (en) AUTOMOTIVE LIGHTING MODULE WITH COMBINED CODE AND ROAD FUNCTIONS AND ADJUSTABLE LIGHT SOURCE
EP3167226B1 (en) Lighting module for a motor vehicle
FR3041738A1 (en) PRIMARY OPTICAL ELEMENT FOR LIGHT MODULE OF MOTOR VEHICLE
EP1762776A1 (en) Method for the manufacturing of a module or a vehicle headlamp
FR3012867A1 (en) PRIMARY OPTICAL ELEMENT, LIGHT MODULE AND PROJECTOR FOR MOTOR VEHICLE
EP3803198B1 (en) Lighting module for automotive vehicle
FR3002022A1 (en) LIGHTING AND / OR SIGNALING DEVICE WITH TORIC LENS
EP3454096B1 (en) Fresnel lens with variable draw angle
EP3453946A1 (en) Light module for a motor vehicle, and lighting and/or signalling device comprising such a module
EP3470727A1 (en) Lighting module forming a light pattern divided into an upper portion with net vertical ledges and a lower portion with fuzzy vertical edges
EP3517830B1 (en) Road lighting device with a controlled caustic generating surface forming a light beam
EP3271211B1 (en) Lighting and/or signaling system for motor vehicles
FR3077117A1 (en) LUMINOUS MODULE FOR A MOTOR VEHICLE, AND LIGHTING AND / OR SIGNALING DEVICE EQUIPPED WITH SUCH A MODULE
EP4416015A1 (en) System for projecting multiple light beams
FR3139881A1 (en) Light module
FR3056695A1 (en) LIGHTING DEVICE FOR A MOTOR VEHICLE HAVING A LIGHT GUIDE
FR2890721A1 (en) Motor vehicle dippable-beam light design procedure uses lens with output surface that can be linked to smooth surface of adjacent modules
BE374664A (en)
FR2911664A1 (en) Signaling or lighting module for e.g. car, has flux-recovering mirror including ellipsoid portion whose parameters constituting reflecting paves are adjusted to compare predetermined photometric characteristics with hearth of mirror

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20180928

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20191016

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 1254856

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200415

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602017014300

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20200408

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200708

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200808

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200709

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200817

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1254856

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200408

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200708

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602017014300

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

26N No opposition filed

Effective date: 20210112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201016

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20201031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201031

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201016

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20211016

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200408

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211016

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230528

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20231023

Year of fee payment: 7

Ref country code: DE

Payment date: 20231011

Year of fee payment: 7