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EP3290777A1 - Optical module for illuminating overhead signs - Google Patents

Optical module for illuminating overhead signs Download PDF

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Publication number
EP3290777A1
EP3290777A1 EP17184962.3A EP17184962A EP3290777A1 EP 3290777 A1 EP3290777 A1 EP 3290777A1 EP 17184962 A EP17184962 A EP 17184962A EP 3290777 A1 EP3290777 A1 EP 3290777A1
Authority
EP
European Patent Office
Prior art keywords
face
optical module
light beam
light
cutoff
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.)
Granted
Application number
EP17184962.3A
Other languages
German (de)
French (fr)
Other versions
EP3290777B1 (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 EP3290777A1 publication Critical patent/EP3290777A1/en
Application granted granted Critical
Publication of EP3290777B1 publication Critical patent/EP3290777B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/26—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
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/27—Thick lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/18—Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to an optical module for a motor vehicle for projecting a final cut-off light beam.
  • Optical modules are already known for emitting light beams with cutoff.
  • the cut-off profile extends generally transversely so as to mark a boundary between a low area which is illuminated by the light beam and an upper area in which the light beam hardly illuminates. This cut thus makes it possible to control the range of the light beam in order to avoid dazzling the drivers of vehicles situated in front of the vehicle.
  • the low beam function is in particular carried out by means of such a cut-off beam.
  • the break can present a purely horizontal profile, a stepped profile separated by an inclined cutoff portion, or a "V" -shaped profile having a horizontal portion and a rising inclined portion, for example at an angle of 15 ° relative to the portion horizontal.
  • gantry points or “overhead light” in English, because they correspond to the area lighting above the other vehicles, where some signs are arranged on gantries above the road.
  • the position of the gantry points in relation to the vehicle, as well as the luminous intensity with which they are illuminated, are imposed by very strict regulations.
  • the projection lens is directly visible from outside the vehicle. Such a modification of the structure of the lens is therefore perceptible by an outside observer. These solutions are therefore not aesthetically pleasing.
  • the present invention provides an optical module of the type described above, characterized in that the optical means primary comprises a light deflection member arranged to deflect a portion of the light rays of the initial light beam below the cutoff of the secondary beam towards the projection means.
  • the invention also relates to a light device for a motor vehicle comprising a first optical module made according to any one of the preceding claims, and comprising a second optical module capable of producing a segmented beam intended to be lit together with the light beam projected by the first optical module for perform a regulatory crossing type lighting function by superposition of the two light beams.
  • a longitudinal transverse plane will be called a "horizontal" plane.
  • upstream and downstream will be used with reference to the direction of movement of the light rays from a light source to a final light beam.
  • the transverse orientation corresponds to the orientation of the horizontal bearing of the cutoff 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 bearing of the cutoff profile of the final light beam.
  • figure 1 an optical module 10 for a motor vehicle which is intended to emit a final cut-off beam in a longitudinal direction "L".
  • optical module 10 participating in a low beam function.
  • Such an optical module 10 is then arranged at the front of a motor vehicle (not shown) to illuminate the road ahead of the vehicle.
  • the optical module 10 mainly comprises a primary optical means 12 and a projection means 14.
  • the optical module 10 also comprises at least one light sources 16, here two light sources 16.
  • the light sources 16 are here formed by light-emitting diodes. There are nine of them here.
  • the light emitting diodes are all carried by a common printed circuit board which extends in a horizontal plane above the primary optical means 12.
  • Each light source 16 is able to transmit in a controlled manner an initial light beam which is here directed substantially vertically downwards towards an input face 18 of the primary optical means 12.
  • the primary optical medium 12 is formed in one piece by a solid part made of a translucent or transparent material, such as polymethyl methacrylate (PMMA) or polycarbonate (PC).
  • the primary optical means 12 comprises in its upper upper part said upper horizontal face 18 input.
  • the input face 18 is provided with a plurality of collimating members 20 each of which is associated with a light source 16.
  • Each member 20 is here formed by a portion of face 18 input shaped lens to collimate the light rays of the initial light beam emitted by the associated light source 16.
  • the rays coming from the light source 16 propagate substantially in a vertical direction in the primary optical means 12.
  • the upper input face 18 is arranged vertically to the right of a total internal reflection face 22 which is arranged to receive the initial light beam and collimated by the collimating member 20.
  • This total reflection face 22 delimits the primary optical means 12 longitudinally towards the rear. It has an inclined slope shape to reflect the light rays incident globally forwards towards a front exit face 24 which delimits the optical means 12 towards the front.
  • the outlet face 24 is here generated by translation of its vertical section, forming a generator, according to a concave curvature director extending in a horizontal plane.
  • the light sources 16 are themselves aligned parallel to the curvature of the output face 24.
  • the primary optical means 12 is provided with a cut-off member arranged to transform said reflected initial light beam into a secondary light beam oriented in a longitudinal direction and having a predetermined lower cut extending generally transversely.
  • the cutoff member is formed by a notch 26 formed in a lower face of the primary optical means 12.
  • the notch 26 has a reentrant upper transverse edge 28, called the cutting edge 28, whose profile corresponds to the shape of the predetermined cut. This is a flat horizontal cut.
  • the cutting edge 28 is more particularly formed by the intersection between a substantially horizontal upstream first intercept face 30 and a substantially vertical downstream second face 32 which extends below the cutting edge 28.
  • the intercepting face 30 is contiguous to the total reflection face 22. It is arranged to completely reflect the light rays of the secondary beam above the edge 28 in the direction of the output face 24. This intercepting face 30 thus ensures that the light rays coming from the light sources 16 are directed above the cutting edge 28. Thus, no light ray intended to form the final cut-off beam passes through the vertical downstream face 32 of the notch 28.
  • the outlet face 24 arranged longitudinally downstream of the cutting edge 28.
  • the face 22 of total reflection is shaped in parabola so as to focus the light rays reflected at the edge 28 of cut.
  • the projection means 14 is arranged longitudinally in front and at a distance from the exit face 24 of the primary optical means 12.
  • the projection means 14 is intended to project a final light beam having an upper cut-off formed by an inverted image of the sub-cut secondary light beam projected by the exit face 24 of the primary optical means 12.
  • the figure 4 illustrates the area 31 illuminated by the final beam on a transverse vertical screen 33 placed 25 meters from the lighting device, perpendicular to the optical axis whose intersection with the screen 33 corresponds to the intersection between the abscissa axis and the ordinate axis. It is observed that the area illuminated by the final beam is delimited upwards by a cutoff line 35.
  • the cutoff line 28 has a horizontal rectilinear shape.
  • the final beam is here a regulatory passing beam.
  • the projection means 14 is formed by a lens made of a piece of transparent or translucent material such as PMMA or PC.
  • the lens has an inlet rear face 34 and an opposite projection face 36.
  • the input face 34 is arranged longitudinally at a distance from the exit face 24 of the primary optical means 12 for the light rays come out in the open air before entering the projection means 14.
  • the projection means 14 is here formed by a separate part of the primary optical means 12.
  • the projection means 14 is focused at the cutoff member. More particularly, the projection means 14 has a cylindrical shape and it comprises a transverse focal line which coincides with the cutting edge 28. This makes it possible to project a final light beam having a sharp cut formed by an inverted image of the cutting edge 28. The image is of course reversed by vertical symmetry on either side of a horizontal focal plane passing through the cutting edge 28.
  • the primary optical means 12 comprises a light deflection member arranged to deflect a portion of the light rays of the initial light beam below the cut-off of the secondary beam in the direction of the projection means.
  • these deviated light rays are projected upwards after passing through the projection means 14 to illuminate gantry points 37 arranged vertically above the cutoff line of the final light beam.
  • the points 37 of gantry are here six in number.
  • a first group of three points 37 of gantry is aligned at 2 ° above the cutoff line, a central point and two points 37 arranged at 4 ° transversely on either side of the central point.
  • a second group of three gantry points 37 is aligned at 4 ° above the cut-off line, a central point and two points 37 arranged at 8 ° transversely on either side of the central point.
  • the deflection member is formed by an exhaust face 38 made in the intercepting face 30.
  • the exhaust face 38 more particularly forms an angle with the intercepting face 30 so as to transmit part of the initial beam outside the primary optical means 12.
  • the light rays coming from the collimated initial beam thus strike the exhaust face 38 directly or after reflection on the face 22. total reflection, with an angle of incidence less than the refraction angle so that said light rays pass through the exhaust face 38 to move towards the downstream vertical face 32, below the edge 28 cut. Said deviated rays thus return again to the primary optical means 12 to move towards the exit face 24 and then towards the projection means 14.
  • the exhaust face 38 is made in a bulge extending vertically projecting outwardly under the intercepting face.
  • the bulge has more particularly a vertical longitudinal section in the form of a prism delimited forwardly by said exhaust face 38 and rearwardly by a rear face 40.
  • the rear face 40 of the bulge is advantageously oriented so as to completely reflect the incident light rays in the direction of the exhaust face 38 to participate in the illumination of the points 37 of gantry.
  • the light rays deviated by the deflection member are thus projected above the cutoff line of the final beam, to perform the regulatory function called "gantry point".
  • the exhaust face 38 is made in a notch made in recess in the face 22 of interception. In vertical section, the notch is thus delimited to the rear by said exhaust face 38.
  • the exhaust face 38 extends, in a horizontal plane, parallel to the output face 24 of the primary optical means 12.
  • the exit face 24 having a curvature in a horizontal plane, the exhaust face 38 itself extends along a curved line.
  • the exhaust face 38 extends continuously towards a plurality of light sources 16, for example six light sources 16. These are the light sources arranged to the left of the figure 3 . Thus, each of these six light sources illuminates an associated portal point.
  • the exhaust face extends discontinuously under the intercepting face.
  • Each exhaust face portion is then arranged in coincidence with an associated light source, each portion being separated transversely from the neighboring exhaust face portion.
  • the optical module 10 described above is part of a luminous device 41 for a motor vehicle comprising said first optical module 10 produced according to the teachings of the invention, and comprising a second optical module 42 capable of producing a segmented light beam which is intended to be lit together the first optical module 10.
  • the superposition of the light beams projected by the two optical modules 10, 42 makes it possible to perform a regulatory crossing-type lighting function as illustrated in FIG. figure 6 .
  • the area 31 of the screen 33 illuminated by the final light beam of the first optical module 10 remains as described above. Points 37 of porticos also remain at their location.
  • a second area 44 illuminated by the second optical module 42 is superimposed with the first area 31 illuminated.
  • This second zone 44 has an upper portion which extends above the cutoff line of the first zone 31 illuminated on one half of the screen 33, here the right half. Said upper portion is delimited upwards by a first horizontal line 46 and laterally towards the center of the screen by a second inclined line 48, for example 15 °, which intersects with the cutoff line of the first zone 31 substantially in the center of the screen 33.
  • the superposition of the two light beams illuminates a global zone 31, 44 delimited upwards by a delimitation comprising a first horizontal lower level 35, formed by the cutoff line 25 of the first zone 31, a second oblique section 48 which extends the first level 35 horizontal.
  • This section 48 oblique is formed by the inclined line 48 of the second zone 44.
  • a second bearing 46 upper formed by the horizontal line 46 upper second zone 44.
  • the first horizontal bearing 31 makes it possible to illuminate the road while avoiding dazzling the drivers of the vehicles traveling in the opposite direction, while the second bearing 46 makes it possible to illuminate with a greater range the side of the road.
  • the cut-off profile is here adapted for a vehicle traveling in a country imposing vehicles to roll on the right of the road.
  • the second optical module 42 may be controlled so that the light beam is displaced to the left or to the right depending on the direction of rotation of the wheels of the vehicle, the final light beam emitted by the first optical module remaining fixed relative to to the vehicle.
  • the light beam can be moved by pivoting the second optical module 42 or by selective ignition of diodes electroluminescent forming a lighting matrix of the second optical module 42.
  • the optical module 10 made according to the teachings of the invention makes it possible to form a beam simultaneously illuminating gantry points.
  • the deflection member of the light rays for illuminating the gantry points is arranged in the primary optical means 12.
  • This primary optical means 12 is not directly visible to an observer when the optical module 10 is mounted on the vehicle. As a result, the deflection member is not visible and the optical module retains an intact and uncluttered aesthetic appearance.
  • the luminous device 41 implementing the optical module 12 made according to the teachings of the invention makes it possible to illuminate the points 37 of gantry in a fixed manner while allowing the realization of a "turn code" by means of a second optical module 42.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne un module (10) optique pour véhicule automobile comportant : - au moins une source (16) lumineuse apte à émettre un faisceau lumineux initial, - un moyen (12) optique primaire apte à recevoir ledit faisceau lumineux initial et comportant un organe (28, 30) de coupure agencé pour transformer ledit faisceau lumineux initial en un faisceau lumineux secondaire orienté dans une direction longitudinale et présentant une coupure inférieure prédéterminée s'étendant globalement transversalement, - un moyen (14) de projection agencé pour projeter un faisceau lumineux final présentant une coupure supérieure formé par une image inversée du faisceau lumineux secondaire à coupure, caractérisé en ce que le moyen (12) optique primaire comporte un organe (38) de déviation de lumière agencé pour dévier une partie des rayons lumineux du faisceau lumineux initial au-dessous de la coupure du faisceau secondaire en direction du moyen de projection.The invention relates to an optical module (10) for a motor vehicle comprising: at least one light source (16) able to emit an initial light beam, primary optical means (12) adapted to receive said initial light beam and comprising a cutoff member (28, 30) arranged to transform said initial light beam into a secondary light beam oriented in a longitudinal direction and having a predetermined lower cutoff; extending generally transversely, - projection means (14) arranged to project a final light beam having an upper cut formed by an inverted image of the secondary light beam cutoff, characterized in that the primary optical means (12) comprises a light deflection member (38) arranged to deflect a portion of the light rays of the initial light beam below the breaking of the secondary beam towards the projection means.

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

L'invention concerne un module optique pour véhicule automobile destiné à projeter un faisceau lumineux final à coupure supérieure.The invention relates to an optical module for a motor vehicle for projecting a final cut-off light beam.

L'invention concerne plus particulièrement un module optique pour véhicule automobile comportant :

  • au moins une source lumineuse apte à émettre un faisceau lumineux initial,
  • un moyen optique primaire apte à recevoir ledit faisceau lumineux initial et comportant un organe de coupure agencé pour transformer ledit faisceau lumineux initial en un faisceau lumineux secondaire orienté dans une direction longitudinale et présentant une coupure inférieure prédéterminée s'étendant globalement transversalement,
  • un moyen de projection agencé pour projeter un faisceau lumineux final présentant une coupure supérieure formé par une image inversée du faisceau lumineux secondaire à coupure.
The invention more particularly relates to an optical module for a motor vehicle comprising:
  • at least one light source capable of emitting an initial light beam,
  • primary optical means adapted to receive said initial light beam and having a cut-off member arranged to transform said initial light beam into a secondary light beam oriented in a longitudinal direction and having a predetermined lower cut extending generally transversely,
  • projection means arranged to project a final light beam having an upper cut formed by an inverted image of the secondary light beam cutoff.

ARRIERE PLAN TECHNIQUE DE L'INVENTIONBACKGROUND ART OF THE INVENTION

On connaît déjà des modules optiques destinés à émettre des faisceaux lumineux à coupure. Le profil de coupure s'étend globalement transversalement de manière à marquer une frontière entre une zone basse qui est éclairée par le faisceau lumineux et une zone supérieure dans laquelle le faisceau lumineux n'éclaire quasiment pas. Cette coupure permet ainsi de maîtriser la portée du faisceau lumineux afin d'éviter d'éblouir les conducteurs de véhicules situés en avant du véhicule.Optical modules are already known for emitting light beams with cutoff. The cut-off profile extends generally transversely so as to mark a boundary between a low area which is illuminated by the light beam and an upper area in which the light beam hardly illuminates. This cut thus makes it possible to control the range of the light beam in order to avoid dazzling the drivers of vehicles situated in front of the vehicle.

La fonction de feu de croisement est notamment réalisée au moyen d'un tel faisceau à coupure. La coupure peut présenter un profil purement horizontal, un profil étagé séparé par une portion de coupure inclinée, ou encore un profil en forme de "V" présentant une portion horizontale et une portion inclinée montante, par exemple d'un angle de 15° par rapport à la portion horizontale.The low beam function is in particular carried out by means of such a cut-off beam. The break can present a purely horizontal profile, a stepped profile separated by an inclined cutoff portion, or a "V" -shaped profile having a horizontal portion and a rising inclined portion, for example at an angle of 15 ° relative to the portion horizontal.

Certaines réglementations autorisent que certains points situés au-dessus de la coupure soient éclairés par le faisceau lumineux. Ces points sont généralement appelés "points de portique", ou "overhead light" en anglais, car ils correspondent à l'éclairage de zone situées au-dessus des autres véhicules, à l'endroit où certains panneaux de signalisation sont agencés sur des portiques au-dessus de la route.Some regulations allow certain points above the cutoff to be illuminated by the light beam. These points are generally called "gantry points", or "overhead light" in English, because they correspond to the area lighting above the other vehicles, where some signs are arranged on gantries above the road.

La position des points de portiques par rapport au véhicule, ainsi que l'intensité lumineuse avec laquelle ils sont éclairés sont imposées par des réglementations très strictes.The position of the gantry points in relation to the vehicle, as well as the luminous intensity with which they are illuminated, are imposed by very strict regulations.

On a déjà proposé de réaliser l'éclairage de ces points de portique en modifiant la structure d'une lentille de projection du module optique.It has already been proposed to provide illumination of these portal points by modifying the structure of a projection lens of the optical module.

Cependant, la lentille de projection est directement visible depuis l'extérieur du véhicule. Une telle modification de structure de la lentille est donc perceptible par un observateur extérieur. Ces solutions ne sont donc pas esthétiquement satisfaisantes.However, the projection lens is directly visible from outside the vehicle. Such a modification of the structure of the lens is therefore perceptible by an outside observer. These solutions are therefore not aesthetically pleasing.

On a aussi proposé d'agencer des miroirs pour réfléchir des rayons lumineux vers le haut en direction des points de portique.It has also been proposed to arrange mirrors for reflecting light rays upwards towards the portal points.

Cependant, une telle solution impose d'utiliser un élément de réflexion supplémentaire qui est rapporté au module optique. Un tel élément est encombrant et onéreux à installer.However, such a solution requires the use of an additional reflection element which is related to the optical module. Such an element is bulky and expensive to install.

BREF RESUME DE L'INVENTIONBRIEF SUMMARY OF THE INVENTION

La présente invention propose un module optique du type décrit précédemment, caractérisé en ce que le moyen optique primaire comporte un organe de déviation de lumière agencé pour dévier une partie des rayons lumineux du faisceau lumineux initial au-dessous de la coupure du faisceau secondaire en direction du moyen de projection.The present invention provides an optical module of the type described above, characterized in that the optical means primary comprises a light deflection member arranged to deflect a portion of the light rays of the initial light beam below the cutoff of the secondary beam towards the projection means.

Selon d'autres caractéristiques de l'invention :

  • le moyen optique primaire est une pièce pleine réalisée en un matériau translucide ou transparent ;
  • l'organe de coupure est formé par une encoche réalisée dans une face inférieure du moyen optique primaire qui présente une arête transversale supérieure de coupure dont le profil correspond à la forme de la coupure prédéterminée, le profil de coupure pouvant être un profil rectiligne ou, en variante, un profil présentant une portion horizontale et une portion oblique faisant un angle avec la portion horizontale, notamment un angle de 15° ;
  • l'arête de coupure est formée à l'intersection entre :
    • -- une première face amont d'interception, notamment sensiblement horizontale, qui est agencée pour réfléchir totalement les rayons lumineux issus des sources lumineuses au-dessus de l'arête de coupure en direction du moyen de projection, et
    • -- une deuxième face aval, notamment sensiblement verticale, qui s'étend au-dessous de l'arête de coupure, cette deuxième face aval étant agencée pour n'intercepter aucun des rayons lumineux n'étant pas dévié par l'organe de déviation ;
  • l'organe de déviation est formé par une face d'échappement réalisée dans le moyen optique primaire, notamment en amont de l'arête de coupure, notamment dans la face d'interception, la face d'échappement formant un angle avec la face d'interception de manière à transmettre une partie du faisceau initial à l'extérieur du moyen optique primaire, notamment au-dessous de l'arête de coupure, par exemple vers la deuxième face aval de l'organe de coupure ;
  • la face d'échappement est réalisée dans un renflement s'étendant en saillie à l'extérieur sous la face d'interception ;
  • la face d'échappement est réalisée dans une entaille réalisée en creux dans la face d'interception ;
  • les rayons lumineux déviés par l'organe de déviation sont projetés au-dessus de la ligne de coupure du faisceau final, pour réaliser une fonction réglementaire dite de "points de portique", les rayons lumineux déviés sortant par la face d'échappement étant notamment dirigés vers la face aval de l'organe de coupure, la face d'échappement coopérant avec la face aval de sorte que les rayons lumineux déviés par la face d'échappement et traversant ladite portion de face aval réalisent ladite fonction réglementaire de points de portique ;
  • le moyen optique primaire comporte au moins un organe de collimation, notamment un collimateur, pour collimater les rayons lumineux émis par une source lumineuse associée ;
  • le moyen optique primaire comporte une face de réflexion totale interne qui est agencée pour recevoir le faisceau lumineux collimaté et pour le focaliser au niveau de l'organe de coupure ;
  • le module optique comporte une face de sortie agencée en aval de l'organe de coupure ;
  • le moyen de projection est focalisé au niveau de l'organe de coupure ;
  • le moyen de projection présente une ligne focale transversale qui est confondue avec l'arête de l'organe de coupure ;
  • le moyen de projection est formé par une lentille.
According to other features of the invention:
  • the primary optical means is a solid piece made of a translucent or transparent material;
  • the cutoff member is formed by a notch formed in a lower face of the primary optical means which has an upper transverse cutting edge whose profile corresponds to the shape of the predetermined cutoff, the cutoff profile can be a rectilinear profile or, alternatively, a profile having a horizontal portion and an oblique portion at an angle to the horizontal portion, including an angle of 15 °;
  • the cutting edge is formed at the intersection between:
    • a first upstream face of interception, in particular a substantially horizontal one, which is arranged to totally reflect the light rays coming from the light sources above the cutting edge in the direction of the projection means, and
    • a second downstream face, notably substantially vertical, which extends below the cutting edge, this second downstream face being arranged to intercept none of the light rays not being deflected by the deflection member ;
  • the deflection member is formed by an exhaust face formed in the primary optical means, in particular upstream of the cutting edge, in particular in the intercepting face, the exhaust face forming an angle with the face of the interception so as to transmit a portion of the initial beam outside the primary optical medium, especially below the cutoff edge, for example to the second downstream face of the cutoff member;
  • the exhaust face is made in a bulge projecting outwardly under the intercepting face;
  • the exhaust face is made in a recess cut in the intercepting face;
  • the light rays deflected by the deflection member are projected above the cutoff line of the final beam, to perform a regulatory function called "gantry points", the deviated light rays coming out of the exhaust face being in particular directed towards the downstream face of the cut-off member, the exhaust face cooperating with the downstream face so that the light rays deflected by the exhaust face and passing through said downstream face portion perform said regulatory function of gantry points ;
  • the primary optical means comprises at least one collimating member, in particular a collimator, for collimating the light rays emitted by an associated light source;
  • the primary optical means comprises an internal total reflection face which is arranged to receive the collimated light beam and to focus it at the cut-off member;
  • the optical module comprises an output face arranged downstream of the cut-off member;
  • the projection means is focused at the cutoff member;
  • the projection means has a transverse focal line which coincides with the edge of the cutoff member;
  • the projection means is formed by a lens.

L'invention concerne aussi un dispositif lumineux pour véhicule automobile comportant un premier module optique réalisé selon l'une quelconque des revendications précédentes, et comportant un deuxième module optique apte à réaliser un faisceau segmenté destiné à être allumé conjointement avec le faisceau lumineux projeté par le premier module optique pour réaliser une fonction d'éclairage de type croisement réglementaire par superposition des deux faisceaux lumineux.The invention also relates to a light device for a motor vehicle comprising a first optical module made according to any one of the preceding claims, and comprising a second optical module capable of producing a segmented beam intended to be lit together with the light beam projected by the first optical module for perform a regulatory crossing type lighting function by superposition of the two light beams.

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 en perspective de dessus qui représente un module optique réalisé selon les enseignements de l'invention, les sources lumineuses ayant été omises pour des raisons de clarté ;
  • la figure 2A est une vue en section selon le plan de coupe 2-2 de la figure 1 qui représente le cheminement des rayons lumineux dans le module optique de la figure 1 depuis une source lumineuse jusqu'à un faisceau lumineux final ;
  • la figure 2B est une vue de détail à plus grande échelle similaire à celle de la figure 2A qui représente une variante de réalisation du module optique ;
  • la figure 3 est une vue en perspective de dessous qui représente le module optique de la figure 1 ;
  • la figure 4 est une vue de face qui représente un écran éclairé par le faisceau lumineux final émis par le module optique de la figure 1 ;
  • la figure 5 est une vue de dessus qui représente un dispositif lumineux de véhicule automobile comportant le module optique de la figure 1 associé à un deuxième module optique pour former un faisceau lumineux de croisement réglementaire ;
  • la figure 6 est une vue similaire à celle de la figure 4 qui représente l'écran éclairé simultanément par le module optique de la figure 1 et le deuxième module optique du dispositif lumineux de la figure 5.
Other features and advantages of the invention will appear during the reading of the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
  • the figure 1 is a perspective view from above which shows an optical module made according to the teachings of the invention, the light sources having been omitted for the sake of clarity;
  • the Figure 2A is a sectional view along section plane 2-2 of the figure 1 which represents the path of the light rays in the optical module of the figure 1 from a light source to a final light beam;
  • the Figure 2B is a detail view on a larger scale similar to that of the Figure 2A which represents an alternative embodiment of the optical module;
  • the figure 3 is a perspective view from below that represents the optical module of the figure 1 ;
  • the figure 4 is a front view which represents a screen illuminated by the final light beam emitted by the optical module of the figure 1 ;
  • the figure 5 is a view from above which represents a light device of a motor vehicle comprising the optical module of the figure 1 associated with a second optical module to form a regulatory crossing light beam;
  • the figure 6 is a view similar to that of the figure 4 which represents the screen illuminated simultaneously by the optical module of the figure 1 and the second optical module of the light device of the figure 5 .

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 remainder of the description, the following will be adopted without limitation:
  • longitudinal directed back and forth according to the output direction of the final light beam;
  • vertical directed from below upwards;
  • transverse orthogonal to the longitudinal and vertical directions.

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

Dans la suite de la description, on utilisera les termes "amont" et "aval" en référence au sens de déplacement des rayons lumineux depuis une source lumineuse jusqu'à un faisceau lumineux final.In the remainder of the description, the terms "upstream" and "downstream" will be used with reference to the direction of movement of the light rays from a light source to a final light beam.

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 cutoff 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 bearing 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 remainder of the description, elements having the same structure or similar functions will be designated by the same references.

On a représenté à la figure 1 un module 10 optique pour véhicule automobile qui est destiné à émettre un faisceau final à coupure supérieure dans une direction longitudinale "L".We have shown figure 1 an optical module 10 for a motor vehicle which is intended to emit a final cut-off beam in a longitudinal direction "L".

Il s'agit par exemple d'un module 10 optique participant à une fonction de feu de croisement. Un tel module 10 optique est alors agencé à l'avant d'un véhicule automobile (non représenté) pour éclairer la route en avant du véhicule.This is for example an optical module 10 participating in a low beam function. Such an optical module 10 is then arranged at the front of a motor vehicle (not shown) to illuminate the road ahead of the vehicle.

Le module 10 optique comporte principalement un moyen 12 optique primaire et un moyen 14 de projection.The optical module 10 mainly comprises a primary optical means 12 and a projection means 14.

Comme représenté à la figure 2A, le module 10 optique comporte aussi au moins une sources 16 lumineuses, ici deux sources 16 lumineuses. Les sources 16 lumineuses sont ici formées par des diodes électroluminescentes. Elles sont ici au nombre de neuf. Les diodes électroluminescentes sont toutes portées par une plaque à circuit imprimé commune qui s'étend dans un plan horizontal au-dessus du moyen 12 optique primaire.As represented in Figure 2A the optical module 10 also comprises at least one light sources 16, here two light sources 16. The light sources 16 are here formed by light-emitting diodes. There are nine of them here. The light emitting diodes are all carried by a common printed circuit board which extends in a horizontal plane above the primary optical means 12.

Chaque source 16 lumineuse est apte à émettre de manière commandée un faisceau lumineux initial qui est ici dirigé sensiblement verticalement vers le bas en direction d'une face 18 d'entrée du moyen 12 optique primaire.Each light source 16 is able to transmit in a controlled manner an initial light beam which is here directed substantially vertically downwards towards an input face 18 of the primary optical means 12.

Le moyen 12 optique primaire est formé en un bloc par une pièce pleine réalisée en un matériau translucide ou transparent, tel que du polyméthacrylate de méthyle (PMMA) ou du polycarbonate (PC). Le moyen 12 optique primaire comporte dans sa partie supérieure arrière ladite face 18 supérieure horizontale d'entrée.The primary optical medium 12 is formed in one piece by a solid part made of a translucent or transparent material, such as polymethyl methacrylate (PMMA) or polycarbonate (PC). The primary optical means 12 comprises in its upper upper part said upper horizontal face 18 input.

La face 18 d'entrée est munie d'une pluralité d'organes 20 de collimation dont chacun est associé avec une source 16 lumineuse. Chaque organe 20 est ici formé par une portion de face 18 d'entrée conformée en lentille pour collimater les rayons lumineux du faisceau lumineux initial émis par la source 16 lumineuse associée. Ainsi, les rayons issus de la source 16 lumineuse se propagent sensiblement selon une direction verticale dans le moyen 12 optique primaire.The input face 18 is provided with a plurality of collimating members 20 each of which is associated with a light source 16. Each member 20 is here formed by a portion of face 18 input shaped lens to collimate the light rays of the initial light beam emitted by the associated light source 16. Thus, the rays coming from the light source 16 propagate substantially in a vertical direction in the primary optical means 12.

La face 18 supérieure d'entrée est agencée verticalement au droit d'une face 22 de réflexion totale interne qui est agencée pour recevoir le faisceau lumineux initial ainsi collimaté par l'organe 20 de collimation. Cette face 22 de réflexion totale délimite le moyen 12 optique primaire longitudinalement vers l'arrière. Elle présente une forme inclinée en dévers pour réfléchir les rayons lumineux incidents globalement vers l'avant en direction d'une face 24 avant de sortie qui délimite le moyen 12 optique vers l'avant.The upper input face 18 is arranged vertically to the right of a total internal reflection face 22 which is arranged to receive the initial light beam and collimated by the collimating member 20. This total reflection face 22 delimits the primary optical means 12 longitudinally towards the rear. It has an inclined slope shape to reflect the light rays incident globally forwards towards a front exit face 24 which delimits the optical means 12 towards the front.

La face 24 de sortie est ici générée par translation de sa section verticale, formant une génératrice, selon une directrice de courbure concave s'étendant dans un plan horizontal. Les sources 16 lumineuses sont elles-mêmes alignées parallèlement à la courbure de la face 24 de sortie.The outlet face 24 is here generated by translation of its vertical section, forming a generator, according to a concave curvature director extending in a horizontal plane. The light sources 16 are themselves aligned parallel to the curvature of the output face 24.

Le moyen 12 optique primaire est équipé d'un organe de coupure agencé pour transformer ledit faisceau lumineux initial réfléchi en un faisceau lumineux secondaire orienté dans une direction longitudinale et présentant une coupure inférieure prédéterminée s'étendant globalement transversalement.The primary optical means 12 is provided with a cut-off member arranged to transform said reflected initial light beam into a secondary light beam oriented in a longitudinal direction and having a predetermined lower cut extending generally transversely.

L'organe de coupure est formé par une encoche 26 réalisée dans une face inférieure du moyen 12 optique primaire. L'encoche 26 présente une arête 28 transversale supérieure rentrante, dite arête 28 de coupure, dont le profil correspond à la forme de la coupure prédéterminée. Il s'agit ici d'une coupure plate horizontale.The cutoff member is formed by a notch 26 formed in a lower face of the primary optical means 12. The notch 26 has a reentrant upper transverse edge 28, called the cutting edge 28, whose profile corresponds to the shape of the predetermined cut. This is a flat horizontal cut.

L'arête 28 de coupure est plus particulièrement formée par l'intersection entre une première face 30 amont d'interception sensiblement horizontale et une deuxième face 32 aval sensiblement verticale qui s'étend au-dessous de l'arête 28 de coupure.The cutting edge 28 is more particularly formed by the intersection between a substantially horizontal upstream first intercept face 30 and a substantially vertical downstream second face 32 which extends below the cutting edge 28.

La face 30 d'interception est contiguë à la face 22 de réflexion totale. Elle est agencée pour réfléchir totalement les rayons lumineux du faisceau secondaire au-dessus de l'arête 28 en direction de la face 24 de sortie. Cette face 30 d'interception, garantit ainsi que les rayons lumineux issus des sources 16 lumineuses soient dirigés au-dessus de l'arête 28 de coupure. Ainsi, aucun rayon lumineux destiné à former le faisceau à coupure final ne passe à travers la face 32 aval verticale de l'encoche 28.The intercepting face 30 is contiguous to the total reflection face 22. It is arranged to completely reflect the light rays of the secondary beam above the edge 28 in the direction of the output face 24. This intercepting face 30 thus ensures that the light rays coming from the light sources 16 are directed above the cutting edge 28. Thus, no light ray intended to form the final cut-off beam passes through the vertical downstream face 32 of the notch 28.

La face 24 de sortie agencée longitudinalement en aval de l'arête 28 de coupure.The outlet face 24 arranged longitudinally downstream of the cutting edge 28.

Dans un plan de coupe vertical longitudinal, comme illustré à la figure 2A, la face 22 de réflexion totale est conformée en parabole de manière à focaliser les rayons lumineux réfléchis au niveau de l'arête 28 de coupure.In a longitudinal vertical section plane, as shown in Figure 2A , the face 22 of total reflection is shaped in parabola so as to focus the light rays reflected at the edge 28 of cut.

Le moyen 14 de projection est agencé longitudinalement en avant et à distance de la face 24 de sortie du moyen 12 optique primaire. Le moyen 14 de projection est destiné à projeter un faisceau lumineux final présentant une coupure supérieure formé par une image inversée du faisceau lumineux secondaire à coupure projeté par la face 24 de sortie du moyen 12 optique primaire.The projection means 14 is arranged longitudinally in front and at a distance from the exit face 24 of the primary optical means 12. The projection means 14 is intended to project a final light beam having an upper cut-off formed by an inverted image of the sub-cut secondary light beam projected by the exit face 24 of the primary optical means 12.

La figure 4 illustre la zone 31 éclairée par le faisceau final sur un écran 33 vertical transversal placé à 25 mètres du dispositif d'éclairage, perpendiculairement à l'axe optique dont l'intersection avec l'écran 33 correspond au croisement entre l'axe des abscisses et l'axe des ordonnées. On observe que la zone éclairée par le faisceau final est délimitée vers le haut par une ligne de coupure 35. La ligne de coupure 28 présente une forme rectiligne horizontale. Le faisceau final est ici un faisceau de croisement réglementaire.The figure 4 illustrates the area 31 illuminated by the final beam on a transverse vertical screen 33 placed 25 meters from the lighting device, perpendicular to the optical axis whose intersection with the screen 33 corresponds to the intersection between the abscissa axis and the ordinate axis. It is observed that the area illuminated by the final beam is delimited upwards by a cutoff line 35. The cutoff line 28 has a horizontal rectilinear shape. The final beam is here a regulatory passing beam.

Plus particulièrement, le moyen 14 de projection est formé par une lentille réalisée en une pièce de matériau transparent ou translucide tel que du PMMA ou du PC. La lentille comporte une face 34 arrière d'entrée et une face 36 opposée de projection.More particularly, the projection means 14 is formed by a lens made of a piece of transparent or translucent material such as PMMA or PC. The lens has an inlet rear face 34 and an opposite projection face 36.

La face 34 d'entrée est agencée longitudinalement à distance de la face 24 de sortie du moyen 12 optique primaire pour le les rayons lumineux sortent à l'air libre avant de pénétrer dans le moyen 14 de projection.The input face 34 is arranged longitudinally at a distance from the exit face 24 of the primary optical means 12 for the light rays come out in the open air before entering the projection means 14.

Le moyen 14 de projection est ici formé par une pièce distincte du moyen 12 optique primaire.The projection means 14 is here formed by a separate part of the primary optical means 12.

Le moyen 14 de projection est focalisé au niveau de l'organe de coupure. Plus particulièrement, le moyen 14 de projection présente une forme cylindrique et il comporte une ligne focale transversale qui est confondue avec l'arête 28 de coupure. Ceci permet de projeter un faisceau lumineux final présentant une coupure nette formée par une image inversée de l'arête 28 de coupure. L'image est bien entendu inversée par symétrie verticale de part et d'autre d'un plan focal horizontal passant par l'arête 28 de coupure.The projection means 14 is focused at the cutoff member. More particularly, the projection means 14 has a cylindrical shape and it comprises a transverse focal line which coincides with the cutting edge 28. This makes it possible to project a final light beam having a sharp cut formed by an inverted image of the cutting edge 28. The image is of course reversed by vertical symmetry on either side of a horizontal focal plane passing through the cutting edge 28.

Selon les enseignements de l'invention, le moyen 12 optique primaire comporte un organe de déviation de la lumière agencé pour dévier une partie des rayons lumineux du faisceau lumineux initial au-dessous de la coupure du faisceau secondaire en direction du moyen de projection. Ainsi, ces rayons lumineux déviés sont projetés vers le haut après leur passage à travers le moyen 14 de projection pour éclairer des points 37 de portique agencés verticalement au-dessus de la ligne de coupure du faisceau lumineux final.According to the teachings of the invention, the primary optical means 12 comprises a light deflection member arranged to deflect a portion of the light rays of the initial light beam below the cut-off of the secondary beam in the direction of the projection means. Thus, these deviated light rays are projected upwards after passing through the projection means 14 to illuminate gantry points 37 arranged vertically above the cutoff line of the final light beam.

Comme représenté à la figure 4, les points 37 de portique sont ici au nombre de six. Un premier groupe de trois points 37 de portique est aligné à 2° au-dessus de la ligne de coupure, un point central et deux points 37 agencés à 4° transversalement de part et d'autre du point central. Un deuxième groupe de trois points 37 de portique est aligné à 4° au-dessus de la ligne de coupure, un point central et deux points 37 agencés à 8° transversalement de part et d'autre du point central.As represented in figure 4 , the points 37 of gantry are here six in number. A first group of three points 37 of gantry is aligned at 2 ° above the cutoff line, a central point and two points 37 arranged at 4 ° transversely on either side of the central point. A second group of three gantry points 37 is aligned at 4 ° above the cut-off line, a central point and two points 37 arranged at 8 ° transversely on either side of the central point.

A cet effet, l'organe de déviation est formé par une face 38 d'échappement réalisée dans la face 30 d'interception. La face 38 d'échappement forme plus particulièrement un angle avec la face 30 d'interception de manière à transmettre une partie du faisceau initial à l'extérieur du moyen 12 optique primaire. Les rayons lumineux issus du faisceau initial collimaté frappent ainsi la face 38 d'échappement, directement ou après réflexion sur la face 22 de réflexion totale, avec un angle d'incidence inférieur à l'angle de réfraction de manière que lesdits rayons lumineux passent à travers la face 38 d'échappement pour se diriger vers la face 32 vertical aval, au-dessous de l'arête 28 de coupure. Lesdits rayons déviés rentrent ainsi à nouveau dans le moyen 12 optique primaire pour se diriger vers la face 24 de sortie, puis vers le moyen 14 de projection.For this purpose, the deflection member is formed by an exhaust face 38 made in the intercepting face 30. The exhaust face 38 more particularly forms an angle with the intercepting face 30 so as to transmit part of the initial beam outside the primary optical means 12. The light rays coming from the collimated initial beam thus strike the exhaust face 38 directly or after reflection on the face 22. total reflection, with an angle of incidence less than the refraction angle so that said light rays pass through the exhaust face 38 to move towards the downstream vertical face 32, below the edge 28 cut. Said deviated rays thus return again to the primary optical means 12 to move towards the exit face 24 and then towards the projection means 14.

Etant donné que les rayons déviés par la face 38 d'échappement passent au-dessous de l'arête 28 de coupure, leur image par le moyen 14 de projection est projetée au-dessus de la ligne de coupure du faisceau final. On comprendra que la position de la face 38 d'échappement est déterminée de manière que les points 37 éclairés par lesdits rayons déviés dans le faisceau final correspondent aux points 37 de portique.Since the rays deviated by the exhaust face 38 pass below the cutting edge 28, their image by the projection means 14 is projected above the cutoff line of the final beam. It will be understood that the position of the exhaust face 38 is determined so that the points 37 illuminated by said deviated rays in the final beam correspond to the points 37 of gantry.

Dans l'exemple représenté à la figure 2A, la face 38 d'échappement est réalisée dans un renflement s'étendant verticalement en saillie à l'extérieur sous la face 30 d'interception. Le renflement présente plus particulièrement une section longitudinale verticale en forme de prisme délimité vers l'avant par ladite face 38 d'échappement et vers l'arrière par une face 40 arrière. La face 40 arrière du renflement est avantageusement orientée de manière à réfléchir totalement les rayons lumineux incidents en direction de la face 38 d'échappement pour participer à l'éclairage des points 37 de portique. Les rayons lumineux déviés par l'organe de déviation sont ainsi projetés au-dessus de la ligne de coupure du faisceau final, pour réaliser la fonction réglementaire dite de "point de portique".In the example shown in Figure 2A , the exhaust face 38 is made in a bulge extending vertically projecting outwardly under the intercepting face. The bulge has more particularly a vertical longitudinal section in the form of a prism delimited forwardly by said exhaust face 38 and rearwardly by a rear face 40. The rear face 40 of the bulge is advantageously oriented so as to completely reflect the incident light rays in the direction of the exhaust face 38 to participate in the illumination of the points 37 of gantry. The light rays deviated by the deflection member are thus projected above the cutoff line of the final beam, to perform the regulatory function called "gantry point".

Selon une variante de l'invention représentée à la figure 2B, la face 38 d'échappement est réalisée dans une entaille réalisée en creux dans la face 22 d'interception. En section verticale, l'entaille est ainsi délimitée vers l'arrière par ladite face 38 d'échappement.According to a variant of the invention shown in Figure 2B , the exhaust face 38 is made in a notch made in recess in the face 22 of interception. In vertical section, the notch is thus delimited to the rear by said exhaust face 38.

Comme représenté à la figure 3, la face 38 d'échappement s'étend, dans un plan horizontal, parallèlement à la face 24 de sortie du moyen 12 optique primaire. La face 24 de sortie présentant une courbure dans un plan horizontal, la face 38 d'échappement s'étend elle-même selon une ligne courbe. La face 38 d'échappement s'étend de manière continue en vis-à-vis de plusieurs sources 16 lumineuses, par exemple six sources 16 lumineuses. Il s'agit des sources 16 lumineuses agencées à gauche de la figure 3. Ainsi, chacune de ces six sources 16 lumineuses éclaire un point de portique associé.As represented in figure 3 , the exhaust face 38 extends, in a horizontal plane, parallel to the output face 24 of the primary optical means 12. The exit face 24 having a curvature in a horizontal plane, the exhaust face 38 itself extends along a curved line. The exhaust face 38 extends continuously towards a plurality of light sources 16, for example six light sources 16. These are the light sources arranged to the left of the figure 3 . Thus, each of these six light sources illuminates an associated portal point.

En variante non représentée, la face d'échappement s'étend de manière discontinue sous la face d'interception. Chaque portion de face d'échappement est alors agencée en coïncidence avec une source lumineuse associée, chaque portion étant séparée transversalement de la portion de face d'échappement voisine.In variant not shown, the exhaust face extends discontinuously under the intercepting face. Each exhaust face portion is then arranged in coincidence with an associated light source, each portion being separated transversely from the neighboring exhaust face portion.

Comme cela est représenté à la figure 5, le module 10 optique décrit précédemment fait par exemple partie d'un dispositif 41 lumineux pour véhicule automobile comportant ledit premier module 10 optique réalisé selon les enseignements de l'invention, et comportant un deuxième module 42 optique apte à réaliser un faisceau lumineux segmenté qui est destiné à être allumé conjointement le premier module 10 optique. La superposition des faisceaux lumineux projetés par les deux modules 10, 42 optiques permet de réaliser une fonction d'éclairage de type croisement réglementaire comme cela est illustré à la figure 6.As shown in figure 5 , the optical module 10 described above is part of a luminous device 41 for a motor vehicle comprising said first optical module 10 produced according to the teachings of the invention, and comprising a second optical module 42 capable of producing a segmented light beam which is intended to be lit together the first optical module 10. The superposition of the light beams projected by the two optical modules 10, 42 makes it possible to perform a regulatory crossing-type lighting function as illustrated in FIG. figure 6 .

Ainsi, la zone 31 de l'écran 33 éclairée par le faisceau lumineux final du premier module 10 optique demeure telle que décrite précédemment. Les points 37 de portiques demeurent aussi à leur emplacement.Thus, the area 31 of the screen 33 illuminated by the final light beam of the first optical module 10 remains as described above. Points 37 of porticos also remain at their location.

Une deuxième zone 44 éclairée par le deuxième module 42 optique vient se superposer avec la première zone 31 éclairée. Cette deuxième zone 44 présente une portion supérieure qui s'étend au-dessus de la ligne 35 de coupure de la première zone 31 éclairée sur une moitié de l'écran 33, ici la moitié droite. Cette dite portion supérieure est délimitée vers le haut par une première ligne 46 horizontale supérieure et latéralement vers le centre de l'écran par une deuxième ligne 48 inclinée, par exemple à 15°, qui vient croiser la ligne 35 de coupure de la première zone 31 sensiblement au centre de l'écran 33.A second area 44 illuminated by the second optical module 42 is superimposed with the first area 31 illuminated. This second zone 44 has an upper portion which extends above the cutoff line of the first zone 31 illuminated on one half of the screen 33, here the right half. Said upper portion is delimited upwards by a first horizontal line 46 and laterally towards the center of the screen by a second inclined line 48, for example 15 °, which intersects with the cutoff line of the first zone 31 substantially in the center of the screen 33.

Ainsi, la superposition des deux faisceaux lumineux éclaire une zone globale 31, 44 délimitée vers le haut par une délimitation comportant un premier palier 35 horizontal inférieur, formé par la ligne de coupure 25 de la première zone 31, un deuxième tronçon oblique 48 qui prolonge le premier palier 35 horizontal. Ce tronçon 48 oblique est formé par la ligne inclinée 48 de la deuxième zone 44. Et enfin un deuxième palier 46 supérieur formé par la ligne horizontale 46 supérieure de la deuxième zone 44.Thus, the superposition of the two light beams illuminates a global zone 31, 44 delimited upwards by a delimitation comprising a first horizontal lower level 35, formed by the cutoff line 25 of the first zone 31, a second oblique section 48 which extends the first level 35 horizontal. This section 48 oblique is formed by the inclined line 48 of the second zone 44. And finally a second bearing 46 upper formed by the horizontal line 46 upper second zone 44.

Le premier palier 31 horizontal permet d'éclairer la route en évitant d'éblouir les conducteurs des véhicules roulant en sens inverse, tandis que le deuxième palier 46 permet d'éclairer avec une plus grande portée le côté de la route. Le profil de coupure est ici adapté pour un véhicule roulant dans un pays imposant aux véhicules de rouler à droite de la route.The first horizontal bearing 31 makes it possible to illuminate the road while avoiding dazzling the drivers of the vehicles traveling in the opposite direction, while the second bearing 46 makes it possible to illuminate with a greater range the side of the road. The cut-off profile is here adapted for a vehicle traveling in a country imposing vehicles to roll on the right of the road.

Optionnellement, le deuxième module 42 optique peut être commandé pour que le faisceau lumineux soit déplacé vers la gauche ou vers la droite en fonction du sens de pivotement des roues du véhicule, le faisceau lumineux final émis par le premier module 10 optique demeurant fixe par rapport au véhicule. Ceci permet de conférer au dispositif 41 lumineux une fonction de "code virage", ou "bending light" en langue anglaise, qui permet d'éclairer de manière optimale la route dans les virages. Le faisceau lumineux peut être déplacé par pivotement du deuxième module 42 optique ou encore par allumage sélectifs de diodes électroluminescentes formant une matrice d'éclairage du deuxième module 42 optique.Optionally, the second optical module 42 may be controlled so that the light beam is displaced to the left or to the right depending on the direction of rotation of the wheels of the vehicle, the final light beam emitted by the first optical module remaining fixed relative to to the vehicle. This makes it possible to confer on the luminous device 41 a function of "bend code", or "bending light" in English, which makes it possible to illuminate in an optimal way the road during bends. The light beam can be moved by pivoting the second optical module 42 or by selective ignition of diodes electroluminescent forming a lighting matrix of the second optical module 42.

Le module 10 optique réalisé selon les enseignements de l'invention permet de former un faisceau à coupure éclairant simultanément des points de portique.The optical module 10 made according to the teachings of the invention makes it possible to form a beam simultaneously illuminating gantry points.

Le faisceau à coupure et les points de portique sont éclairés simultanément par des mêmes sources lumineuses. Ainsi, cette solution est particulièrement économique et peu encombrante puisqu'elle ne nécessite pas l'utilisation de sources lumineuses dédiées à l'éclairage des points de portique.The cut beam and the gantry points are illuminated simultaneously by the same light sources. Thus, this solution is particularly economical and not cumbersome since it does not require the use of light sources dedicated to the illumination of gantry points.

En outre, l'organe de déviation des rayons lumineux permettant d'éclairer les points de portique est agencé dans le moyen 12 optique primaire. Ce moyen 12 optique primaire n'est pas directement visible par un observateur lorsque le module 10 optique est monté sur le véhicule. De ce fait, l'organe de déviation n'est pas visible et le module optique conserve un aspect esthétique intact et épuré.In addition, the deflection member of the light rays for illuminating the gantry points is arranged in the primary optical means 12. This primary optical means 12 is not directly visible to an observer when the optical module 10 is mounted on the vehicle. As a result, the deflection member is not visible and the optical module retains an intact and uncluttered aesthetic appearance.

Par ailleurs, le dispositif 41 lumineux mettant en oeuvre le module 12 optique réalisé selon les enseignements de l'invention permet d'éclairer les points 37 de portique de manière fixe tout en permettant la réalisation d'un "code virage" au moyen d'un deuxième module 42 optique.Moreover, the luminous device 41 implementing the optical module 12 made according to the teachings of the invention makes it possible to illuminate the points 37 of gantry in a fixed manner while allowing the realization of a "turn code" by means of a second optical module 42.

Claims (15)

Module (10) optique pour véhicule automobile comportant : - au moins une source (16) lumineuse apte à émettre un faisceau lumineux initial, - un moyen (12) optique primaire apte à recevoir ledit faisceau lumineux initial et comportant un organe (28, 30) de coupure agencé pour transformer ledit faisceau lumineux initial en un faisceau lumineux secondaire orienté dans une direction longitudinale et présentant une coupure inférieure prédéterminée s'étendant globalement transversalement, - un moyen (14) de projection agencé pour projeter un faisceau lumineux final présentant une coupure supérieure formé par une image inversée du faisceau lumineux secondaire à coupure, caractérisé en ce que le moyen (12) optique primaire comporte un organe (38) de déviation de lumière agencé pour dévier une partie des rayons lumineux du faisceau lumineux initial au-dessous de la coupure du faisceau secondaire en direction du moyen de projection.Optical module (10) for a motor vehicle comprising: at least one light source (16) able to emit an initial light beam, primary optical means (12) adapted to receive said initial light beam and comprising a cutoff member (28, 30) arranged to transform said initial light beam into a secondary light beam oriented in a longitudinal direction and having a predetermined lower cutoff; extending generally transversely, - projection means (14) arranged to project a final light beam having an upper cut formed by an inverted image of the secondary light beam cutoff, characterized in that the primary optical means (12) comprises a light deflection member (38) arranged to deflect a portion of the light rays of the initial light beam below the breaking of the secondary beam towards the projection means. Module (10) optique selon la revendication précédente, caractérisé en ce que le moyen (12) optique primaire est une pièce pleine réalisée en un matériau translucide ou transparent.Optical module (10) according to the preceding claim, characterized in that the primary optical means (12) is a solid piece made of a translucent or transparent material. Module (10) optique selon la revendication précédente, caractérisé en ce que l'organe de coupure est formé par une encoche (26) réalisée dans une face inférieure du moyen (12) optique primaire qui présente une arête (28) transversale supérieure de coupure dont le profil correspond à la forme de la coupure prédéterminée.Optical module (10) according to the preceding claim, characterized in that the cut-off member is formed by a notch (26) formed in a lower face of the primary optical means (12) which has an upper cutting edge (28). whose profile corresponds to the shape of the predetermined cut. Module (10) selon la revendication précédente, caractérisé en ce que l'arête (28) de coupure est formée à l'intersection entre : - une première face (30) amont d'interception, notamment sensiblement horizontale, qui est agencée pour réfléchir totalement les rayons lumineux issus des sources (16) lumineuses au-dessus de l'arête (28) de coupure en direction du moyen (14) de projection, et - une deuxième face (32) aval, notamment sensiblement verticale, qui s'étend au-dessous de l'arête (28) de coupure. Module (10) according to the preceding claim, characterized in that the cutting edge (28) is formed at the intersection between: a first upstream (30) interception face, in particular a substantially horizontal one, which is arranged to completely reflect the light rays coming from the light sources (16) above the cutting edge (28) towards the means (14); ) projection, and - A second face (32) downstream, in particular substantially vertical, which extends below the ridge (28) cutoff. Module (10) optique selon l'une quelconque des revendications précédentes, caractérisé en ce que l'organe (38) de déviation est formé par une face (38) d'échappement réalisée dans le moyen optique primaire, notamment dans la face (30) d'interception, la face (38) d'échappement formant un angle avec la face (30) d'interception de manière à transmettre une partie du faisceau initial à l'extérieur du moyen (12) optique primaire, notamment au-dessous de l'arête (28) de coupure, par exemple vers la deuxième face aval de l'organe de coupure.Optical module (10) according to any one of the preceding claims, characterized in that the deflection member (38) is formed by an exhaust face (38) made in the primary optical medium, in particular in the face (30). ) interception, the exhaust face (38) forming an angle with the intercepting face (30) so as to transmit a portion of the initial beam outside the primary optical means (12), especially below cutting edge (28), for example towards the second downstream face of the cut-off member. Module (10) selon la revendication précédente, caractérisé en ce que la face (38) d'échappement est réalisée dans un renflement s'étendant notamment en saillie à l'extérieur du moyen optique primaire, notamment sous la face (30) d'interception.Module (10) according to the preceding claim, characterized in that the exhaust face (38) is formed in a bulge extending in particular protruding outside the primary optical means, in particular under the face (30) of interception. Module (10) optique selon la revendication 5, caractérisé en ce que la face (38) d'échappement est réalisée dans une entaille réalisée en creux dans la face (30) d'interception.Optical module (10) according to claim 5, characterized in that the exhaust face (38) is formed in a recess cut in the interception face (30). Module (10) optique selon l'une quelconque des revendications précédentes, caractérisé en ce que les rayons lumineux déviés par l'organe (38) de déviation sont projetés au-dessus de la ligne (35) de coupure du faisceau final, pour réaliser une fonction réglementaire dite de "points (37) de portique".Optical module (10) according to any one of the preceding claims, characterized in that the light rays deflected by the deflection member (38) are projected above the line (35) for cutting the final beam, to achieve a regulatory function called "points (37) gantry". Module (10) optique selon l'une quelconque des revendications précédentes, caractérisé en ce que le moyen (12) optique primaire comporte au moins un organe (20) de collimation, notamment un collimateur, pour collimater les rayons lumineux émis par une source (16) lumineuse associée.Optical module (10) according to one of the preceding claims, characterized in that the means (12) primary optical system comprises at least one collimating member (20), in particular a collimator, for collimating the light rays emitted by an associated light source (16). Module (10) optique selon la revendication précédente, caractérisé en ce que le moyen (12) optique primaire comporte une face (22) de réflexion totale interne qui est agencée pour recevoir le faisceau lumineux collimaté et pour le focaliser au niveau de l'organe (28) de coupure.Optical module (10) according to the preceding claim, characterized in that the primary optical means (12) comprises a face (22) of total internal reflection which is arranged to receive the collimated light beam and to focus it at the level of the organ (28) cutoff. Module (10) optique selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte une face (24) de sortie agencée en aval de l'organe (28) de coupure.Optical module (10) according to any one of the preceding claims, characterized in that it comprises an outlet face (24) arranged downstream of the cut-off member (28). Module (10) optique selon l'une quelconque des revendications précédentes, caractérisé en ce que le moyen (14) de projection est focalisé au niveau de l'organe (28) de coupure.Optical module (10) according to any one of the preceding claims, characterized in that the projection means (14) is focused at the cut-off member (28). Module (10) optique selon la revendication précédente prise en combinaison avec l'une quelconque des revendications 3 ou 4, caractérisé en ce que le moyen (14) de projection présente une ligne focale transversale qui est confondue avec l'arête (28) de l'organe de coupure.Optical module (10) according to the preceding claim taken in combination with any one of claims 3 or 4, characterized in that the projection means (14) has a transverse focal line which coincides with the edge (28) of the cutoff organ. Module (10) optique selon l'une quelconque des revendications précédentes, caractérisé en ce que le moyen (14) de projection est formé par une lentille.Optical module (10) according to one of the preceding claims, characterized in that the projection means (14) is formed by a lens. Dispositif (41) lumineux pour véhicule automobile comportant un premier module (10) optique réalisé selon l'une quelconque des revendications précédentes, et comportant un deuxième module (42) optique apte à réaliser un faisceau segmenté destiné à être allumé conjointement avec le faisceau lumineux projeté par le premier module (10) optique pour réaliser une fonction d'éclairage de type croisement réglementaire par superposition des deux faisceaux lumineux.Device (41) luminous for a motor vehicle comprising a first optical module (10) made according to any one of the preceding claims, and comprising a second optical module (42) capable of producing a segmented beam intended to be lit together with the light beam projected by the first optical module (10) to achieve a regulatory crossing type of lighting function by superposition of the two light beams.
EP17184962.3A 2016-09-01 2017-08-04 Optical module for illuminating overhead signs Active EP3290777B1 (en)

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EP4137744A4 (en) * 2020-07-02 2023-09-13 Hasco Vision Technology Co., Ltd. VEHICLE LAMP OPTICAL UNIT, VEHICLE LAMP MODULE AND VEHICLE
WO2023164023A1 (en) * 2022-02-28 2023-08-31 J.W. Speaker Corporation Headlamp for a vehicle
EP4560185A1 (en) * 2023-11-23 2025-05-28 ZKW Group GmbH Lighting device for a motor vehicle headlight and motor vehicle headlight
WO2025132840A1 (en) * 2023-12-21 2025-06-26 Valeo Vision Light unit for a motor vehicle

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US10690309B2 (en) 2020-06-23
US20180058651A1 (en) 2018-03-01
EP3290777B1 (en) 2023-03-01
CN108302457A (en) 2018-07-20
CN108302457B (en) 2021-05-18
FR3055400A1 (en) 2018-03-02
FR3055400B1 (en) 2019-06-28

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