EP3290777B1 - Module optique pour éclairer des points de portique - Google Patents

Module optique pour éclairer des points de portique Download PDF

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Publication number
EP3290777B1
EP3290777B1 EP17184962.3A EP17184962A EP3290777B1 EP 3290777 B1 EP3290777 B1 EP 3290777B1 EP 17184962 A EP17184962 A EP 17184962A EP 3290777 B1 EP3290777 B1 EP 3290777B1
Authority
EP
European Patent Office
Prior art keywords
face
cutoff
optical module
light
light beam
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
EP17184962.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3290777A1 (fr
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
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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/fr
Application granted granted Critical
Publication of EP3290777B1 publication Critical patent/EP3290777B1/fr
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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 intended to project a final light beam with a higher cut-off.
  • Optical modules intended to emit cut-off light beams are already known.
  • the cut-off profile extends globally transversely so as to mark a border between a lower zone which is illuminated by the light beam and an upper zone 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 located in front of the vehicle.
  • the dipped beam function is in particular performed by means of such a cut-off beam.
  • the cut may present a purely horizontal profile, a stepped profile separated by an inclined cut-off portion, or even a "V"-shaped profile having a horizontal portion and an upward inclined portion, for example at an angle of 15° with respect to the portion horizontal.
  • Some regulations allow certain points located above the cut-off to be illuminated by the light beam. These points are generally called “portico points”, or “overhead light” in English, because they correspond to the lighting of areas located above other vehicles, where certain traffic signs are arranged on gantries above the road.
  • the projection lens is directly visible from outside the vehicle. Such a modification of the structure of the lens is therefore perceptible to an outside observer. These solutions are therefore not aesthetically satisfactory.
  • DE10 2008 015 510 A1 shows an optical module fitted with a cut-off device partially covered with a reflective film.
  • the non-reflecting sections of the film allow lighting of the portal points.
  • the present invention proposes an optical module of the type described previously, characterized in that the optical means primary comprises a light deflection member arranged to deflect part of the light rays of the initial light beam below the cut-off of the secondary beam in the direction of the projection means.
  • the invention also relates to a light device for a motor vehicle comprising a first optical module produced according to any one of the preceding claims, and comprising a second optical module capable of producing a segmented beam intended to be switched on together with the light beam projected by the first optical module for perform a regulatory crossing type lighting function by superimposing the two light beams.
  • a longitudinal transverse plane will be called a "horizontal" plane.
  • upstream and downstream will be used in 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 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 cut-off profile of the final light beam.
  • optical module 10 participating in a dipped headlight function.
  • Such an optical module 10 is then arranged at the front of a motor vehicle (not shown) to illuminate the road in front of the vehicle.
  • the optical module 10 mainly comprises a primary optical means 12 and a means 14 of projection.
  • the optical module 10 also comprises at least one light source 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 capable of emitting in a controlled manner an initial light beam which is here directed substantially vertically downwards in the direction of an input face 18 of the primary optical means 12 .
  • the primary optical means 12 is formed in one block 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 rear part said upper horizontal input face 18 .
  • 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 input face 18 shaped like a lens to collimate the light rays of the initial light beam emitted by the associated light source 16 .
  • the rays 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 in line with a face 22 of total internal reflection which is arranged to receive the initial light beam thus collimated by the collimating member 20.
  • This face 22 of total reflection delimits the primary optical means 12 longitudinally towards the rear. It presents a sloping shape in cant to reflect the incident light rays generally forwards in the direction of a front exit face 24 which delimits the optical means 12 forwards.
  • the output face 24 is here generated by translation of its vertical section, forming a generatrix, along a concave directrix of curvature extending in a horizontal plane.
  • the light sources 16 are themselves aligned parallel to the curvature of the face 24 of the output.
  • the primary optical means 12 is equipped with a cut-off member arranged to transform said initial reflected light beam into a secondary light beam oriented in a longitudinal direction and having a predetermined lower cut-off extending generally transversely.
  • the switching device is formed by a notch 26 made in a lower face of the primary optical means 12 .
  • the notch 26 has a re-entrant upper transverse edge 28, called the cutting edge 28, the profile of which corresponds to the shape of the predetermined cut. This is a horizontal flat cut.
  • the cutting edge 28 is more particularly formed by the intersection between a first substantially horizontal upstream face 30 of interception and a second substantially vertical downstream face 32 which extends below the cutting edge 28 .
  • the interception face 30 is contiguous to the face 22 of total reflection. It is arranged to totally reflect the light rays of the beam above the edge 28 in the direction of the face 24 of the exit. This interception face 30 thus guarantees 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 exit face 24 arranged longitudinally downstream of the cutting edge 28 .
  • the face 22 of total reflection is shaped like a parabola so as to focus the light rays reflected at the level of the edge 28 of cut-off.
  • the projection means 14 is arranged longitudinally in front of 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 a higher cut-off formed by an inverted image of the secondary cut-off light beam projected by the output face 24 of the primary optical means 12.
  • FIG 4 illustrates the zone 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 can be seen that the zone illuminated by the final beam is delimited at the top by a cut-off line 35.
  • the cut-off line 28 has a horizontal rectilinear shape.
  • the final beam here is a regulatory dipped 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 a rear entrance face 34 and an opposite projection face 36 .
  • the input face 34 is arranged longitudinally at a distance from the output face 24 of the primary optical means 12 so that the light rays leave in the open air before entering the projection means 14.
  • the projection means 14 is here formed by a separate piece of the primary optical means 12 .
  • the projection means 14 is focused at the level of the switching device. More particularly, the means 14 of projection 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 cutoff formed by an inverted image of the edge 28 of cutoff. The image is of course inverted 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 part of the light rays of the initial light beam below the cutoff of the secondary beam in the direction of the projection means.
  • these deflected light rays are projected upwards after passing through the projection means 14 to illuminate portal points 37 arranged vertically above the cut-off line of the final light beam.
  • the gantry points 37 are here six in number.
  • a first group of three gantry points 37 is aligned at 2° above the cut line, a central point and two points 37 arranged at 4° transversely on either side of the central point.
  • a second group of three portal points 37 are aligned at 4° above the cut 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 escape face 38 formed in the intercept face 30.
  • the exhaust face 38 more particularly forms an angle with the interception face 30 so as to transmit part of the initial beam outside the primary optical means 12 .
  • the light rays from the collimated initial beam thus strike the exhaust face 38, directly or after reflection on the face 22 of total reflection, with an angle of incidence less than the angle of refraction so that said light rays pass through the exhaust face 38 to head towards the downstream vertical face 32, below the edge 28 of cut. Said deflected rays thus enter again into the primary optical means 12 to move towards the exit face 24, then towards the projection means 14.
  • the exhaust face 38 is formed in a bulge extending vertically projecting outside under the intercept face 30.
  • the bulge more particularly has a vertical longitudinal section in the form of a prism delimited towards the front by said exhaust face 38 and towards the rear by a rear face 40 .
  • the rear face 40 of the bulge is advantageously oriented so as to totally reflect the incident light rays in the direction of the exhaust face 38 to participate in the lighting of the points 37 of the gantry.
  • the light rays deflected by the deflection member are thus projected above the cut-off line of the final beam, to perform the regulatory function known as "portico point".
  • the exhaust face 38 is made in a recessed notch in the face 22 of interception. In vertical section, the notch is thus delimited towards the rear by said face 38 of the exhaust.
  • the exhaust face 38 extends, in a horizontal plane, parallel to the output face 24 of the primary optical means 12 .
  • the outlet 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 opposite several light sources 16, for example six light sources 16 . These are the light sources 16 arranged to the left of the picture 3 . Thus, each of these six light sources 16 illuminates an associated portico point.
  • the escape face extends discontinuously below the intercept 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 for example part of a light 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 switched on together with 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 lighting function of the regulatory crossing type as illustrated in figure 6 .
  • the zone 31 of the screen 33 illuminated by the final light beam of the first optical module 10 remains as previously described.
  • the gate points 37 also remain in 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 cut-off line 35 of the first zone 31 illuminated over one half of the screen 33, here the right half.
  • This said upper portion is delimited upwards by a first upper horizontal line 46 and laterally towards the center of the screen by a second line 48 inclined, for example at 15°, which intersects the cut-off line 35 of the first zone 31 substantially in the center of the screen 33.
  • the superposition of the two light beams illuminates an overall zone 31, 44 delimited upwards by a delimitation comprising a first lower horizontal level 35, formed by the cut-off line 25 of the first zone 31, a second oblique section 48 which extends the first level 35 horizontal.
  • This oblique section 48 is formed by the inclined line 48 of the second zone 44.
  • a second upper bearing 46 formed by the upper horizontal line 46 of the second zone 44.
  • the first horizontal bearing 31 makes it possible to illuminate the road by avoiding dazzling the drivers of vehicles traveling in the opposite direction, while the second bearing 46 makes it possible to illuminate the side of the road with greater range.
  • the cut-off profile here is suitable for a vehicle driving in a country requiring vehicles to drive on the right of the road.
  • the second optical module 42 can be controlled so that the light beam is moved to the left or to the right depending on the direction of pivoting of the wheels of the vehicle, the final light beam emitted by the first optical module 10 remaining fixed with respect to to the vehicle.
  • the light beam can be moved by pivoting the second optical module 42 or by selectively switching on diodes electroluminescent forming a lighting matrix of the second optical module 42.
  • the optical module 10 produced according to the teachings of the invention makes it possible to form a cut-off beam simultaneously illuminating portal points.
  • the device for deflecting the light rays making it possible to illuminate the portal 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 refined aesthetic appearance.
  • the light device 41 implementing the optical module 12 produced according to the teachings of the invention makes it possible to illuminate the points 37 of the gantry in a fixed manner while allowing the production 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)
EP17184962.3A 2016-09-01 2017-08-04 Module optique pour éclairer des points de portique Active EP3290777B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1658120A FR3055400B1 (fr) 2016-09-01 2016-09-01 Module optique pour eclairer des points de portique

Publications (2)

Publication Number Publication Date
EP3290777A1 EP3290777A1 (fr) 2018-03-07
EP3290777B1 true EP3290777B1 (fr) 2023-03-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17184962.3A Active EP3290777B1 (fr) 2016-09-01 2017-08-04 Module optique pour éclairer des points de portique

Country Status (4)

Country Link
US (1) US10690309B2 (zh)
EP (1) EP3290777B1 (zh)
CN (1) CN108302457B (zh)
FR (1) FR3055400B1 (zh)

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KR20230056465A (ko) * 2021-10-20 2023-04-27 현대모비스 주식회사 차량용 램프
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DE102012220507A1 (de) * 2012-11-09 2014-05-15 Automotive Lighting Reutlingen Gmbh Lichtmodul für einen Scheinwerfer eines Kraftfahrzeugs
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JP6448250B2 (ja) * 2014-08-11 2019-01-09 株式会社小糸製作所 車両用灯具
JP6515525B2 (ja) 2014-12-22 2019-05-22 スタンレー電気株式会社 灯具
TWI607181B (zh) 2015-07-06 2017-12-01 隆達電子股份有限公司 導光柱與使用其的車用燈具

Also Published As

Publication number Publication date
US20180058651A1 (en) 2018-03-01
US10690309B2 (en) 2020-06-23
EP3290777A1 (fr) 2018-03-07
CN108302457A (zh) 2018-07-20
CN108302457B (zh) 2021-05-18
FR3055400A1 (fr) 2018-03-02
FR3055400B1 (fr) 2019-06-28

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