EP1422470B1 - Scheinwerfer für Fahrzeuge mit vergrössertem Beleuchtungsfeld - Google Patents

Scheinwerfer für Fahrzeuge mit vergrössertem Beleuchtungsfeld Download PDF

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Publication number
EP1422470B1
EP1422470B1 EP03292834.3A EP03292834A EP1422470B1 EP 1422470 B1 EP1422470 B1 EP 1422470B1 EP 03292834 A EP03292834 A EP 03292834A EP 1422470 B1 EP1422470 B1 EP 1422470B1
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EP
European Patent Office
Prior art keywords
face
light signals
headlight device
light
projection lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03292834.3A
Other languages
English (en)
French (fr)
Other versions
EP1422470A1 (de
Inventor
Antoine De Lamberterie
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
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Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1422470A1 publication Critical patent/EP1422470A1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • 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
    • F21S41/36—Combinations of two or more separate reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations

Definitions

  • the present invention relates to a projector device, intended to be used in particular in a motor vehicle, which provides an illuminated range widened compared to certain projectors of the state of the art.
  • the object of the invention is essentially to propose an improvement in existing elliptical-type projector devices, which notably have a very small illuminating surface.
  • illuminating surface or illuminating surface, denotes an area at the output of a projector device, from which the light comes.
  • the projector device according to the invention finds its application primarily in use as dipped headlamps, but it could nevertheless be used in any other type of projector device cited. Describing the invention in the context of low beam is therefore in no way limiting to this application alone.
  • the second family is that of so-called elliptical projectors. It is in this type of projectors that the object of the invention finds its main interest.
  • a spot of light concentration is generated by a light source arranged in a mirror.
  • the spot of light concentration is then projected onto the road by a convergent lens, for example a plano-convex lens.
  • the light concentration spot is partially obscured, for example by means of a metal cover disposed within the projector device.
  • FIG. 1 schematically shows a projector device 100 of elliptical type, comprising in particular a light source 101, a reflector 102, an intermediate 103, a cover 104, a projection lens 105 and a lens holder 106.
  • a projector device 100 of elliptical type comprising in particular a light source 101, a reflector 102, an intermediate 103, a cover 104, a projection lens 105 and a lens holder 106.
  • light signals 107 of direct light are used, ie light coming directly from the light source 101 without having been reflected by the reflector 102.
  • light 106 pass through the intermediate 103 via openings specially provided for this purpose.
  • a projector device which allows, while retaining the conventional structure of elliptical projectors devices, to obtain a larger illuminating surface than that of the devices of the state of the art without modifying the structure of existing intermediaries, and in particular without weakening them with openings.
  • the lens it is proposed to deform an area of the lens to deflect a portion of the light signals reaching said lens to send these signals to a ring reflector disposed around the lens.
  • the light signals that are deflected may be direct or indirect light; in addition, the deformation of the lens is such that it allows light input both in the upper part and in the lower part of the ring reflector so as to homogenize the complementary illuminating surface produced by the ring reflector. This characteristic remains valid even in the presence of a cache in the projector device.
  • the zone of deformation of the lens is preferably chosen so as not to modify the main light beam, initially produced by the lens, which must meet certain standards.
  • provision may be made to ensure continuity between the projection lens and the ring reflector in the visual impression of the assembly, ie a driver antagonist does not see a non-luminous area between the initial illuminating surface produced by the lens and the complementary illuminating surface produced by the ring reflector.
  • the invention therefore essentially relates to a projector device comprising in particular a light source emitting a set of light signals, a main reflector for reflecting at least a portion of said main light signals and a projection lens for diffusing a light beam, the projection lens comprising at least one protuberance for deflecting a set of light signals to a ring reflector disposed at the periphery of the projection lens.
  • a projector device of this kind is known to US 4,949,226 and EP 1 052 449 .
  • the ring reflector may consist of a single piece or a juxtaposition of reflective elements. It can also be in the form of a ring portion only.
  • Another object of the invention is a motor vehicle equipped with at least one projector device having at least one of the characteristics which have just been described.
  • FIG. 2 schematically a projector device 200 according to the invention.
  • the figure 2 shows a light source 201 disposed within a main reflector 202.
  • a projection lens 203 is traversed at its center by an optical axis 204, the optical axis 204 also supporting the light source 201.
  • the intermediate and the cache which may be present in some embodiments, of the projector device 200 have not been shown.
  • the projection lens 203 is surrounded by a ring reflector 205. It also has on its exit face 207, that is to say the face accessible from outside the projector device, two deformed zones 206 which cut with the usually smooth appearance of this exit face. These areas correspond to protuberances; they mark a rupture by revealing a protruding zone on at least one of the usually smooth faces of the lenses used.
  • the protuberances are disposed on almost the entire lateral periphery of the lens 203.
  • lateral periphery is meant the zone of the lens located near its periphery, with the exception of the high and low peaks of this lens.
  • the protuberances 206 can meet at its high and low peaks and thus perform a complete turn of the lens 203.
  • the light source 201 produces a set of light signals 208, part of which is brought to meet the protuberances 206, whether directly, this is the case of direct light, or after reflection, it is the in the case of the so-called indirect light, at the main reflector 202.
  • the light signals encountering a protuberance 206 are deflected, preferably radially, ie in a plane approximately perpendicular, to within 10 degrees, to the optical axis 204 They then reach the reflective surface of the ring reflector 205, and are scattered in a predetermined direction.
  • FIG 3 which represents a horizontal section of the projection lens 203 associated with the ring reflector 205.
  • Incident light rays 211 of direct and / or indirect light, reach the lens 203 at an entry surface 212 of this lens .
  • the light rays are not necessarily contained in a horizontal plane, those shown correspond to a projection on the plane of rays meeting the protuberance 206 at this plane.
  • the incident rays 211 undergo a first deflection at the input surface 212 and are directed towards one of the protuberances 206 disposed on an exit face 207 of the projection lens 203.
  • Each protuberance 206 corresponds to a prism which is characterized in particular by a first face 213 and a second face 214.
  • the first face 213 is a reflection face of the incident rays 211.
  • the reflection face is flat; it is arranged such that an angle defined between a normal to this surface and the rays which strike it is greater than a limit reflection angle, so that the incident rays 211 are totally reflected at the reflection surface 213 .
  • the light rays 211 are then directed towards the second face 214, which is a diffusion face.
  • the light signals may or may not undergo a new deflection at the diffusion face 214 to be sent to the reflective face of the ring reflector 205.
  • the shape of the reflective surface of the ring reflector 205 is such that the light signals are reflected. in a previously determined direction. Typically, a horizontal section of this reflective surface is a parabolic arc.
  • the signals reflected by the ring reflector 205 are scattered in a direction substantially parallel to the optical axis, more precisely in a direction corresponding to the normalized point B50L.
  • the set of light signals diffused by the ring reflector 205 constitutes a complementary beam 216 which is thus produced by a complementary illuminating surface.
  • the complementary illuminating surface thus corresponds to the surface of the ring reflector 205 actually used to reflect light signals.
  • the complementary beam 216 obtained in this embodiment is relatively narrow and is not directly adjacent to the main light beam directly from the projection lens 203.
  • Embodiments of the projector device 200 for example the one illustrated in FIG. figure 4 , in which a complementary light beam 217 is wider than the complementary light beam 216.
  • a reflection face 215 which is no longer flat, but curved.
  • the normal to the reflection face 215 has a direction that varies in each point of this reflection face; as a result, incident light signals 211, which arrive in parallel directions on this face, are not reflected in parallel directions as they were in the example of FIG. figure 3 .
  • the curvature of the reflection face 215 is calculated so that the incident rays are transmitted to the entire reflecting surface of the annular reflector 205.
  • a wider complementary bundle 217 is obtained which, moreover, because of the proximity between the ring reflector 205 and the projection lens 203, is directly adjacent to the main light beam directly produced by the lens 203.
  • a curved diffusion face 214 is chosen so as to also obtain an enlarged complementary light beam 217.
  • the various deflections experienced by the light rays at the level of the protrusions 206 have the effect of radially diffusing, ie in a plane approximately perpendicular to the optical axis 204, a set of light rays which are thus capable of reaching the reflective surface of the ring reflector in its entire circumference, whether the protuberances 206 meet or not at the upper and lower ends of the lens 203.
  • a light source annexed to the light source 201, this auxiliary light source being essentially or exclusively intended to emit signals towards the protuberances 206; this embodiment makes it possible in particular to prevent the striations 209 from being made on the reflector in order to be able to reach the lower part of the protuberances 206 in the case where the projector device comprises a cover.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (10)

  1. Scheinwerfervorrichtung (200) mit einer eine Reihe von Lichtsignalen emittierenden Lichtquelle (201), einem Hauptreflektor (202) zum Reflektieren von wenigstens einem Teil der Lichtsignale und einer Projektionslinse (203) zum Streuen eines Hauptlichtbündels, wobei die Projektionslinse (203) wenigstens eine Vorwölbung (206) umfasst, um eine Reihe von Lichtsignalen zu einem am Rand der Projektionslinse (203) angeordneten ringförmigen Reflektor (205) abzulenken, wobei jede Vorwölbung (206) an wenigstens einem Teil des Umfangs der Projektionslinse (203) angeordnet ist,
    dadurch gekennzeichnet, dass wenigstens eine Vorwölbung (206) die Form einer Rippe hat, die eine als Reflexionsfläche bezeichnete erste Seite (213; 215) und eine als Streufläche bezeichnete zweite Seite (214) aufweist, wobei die durch jede Vorwölbung (206) abgelenkten Lichtsignale von der Reflexionsfläche (213; 215) im Wesentlichen, insbesondere vollständig reflektiert werden und danach von der Streufläche (214) im Wesentlichen, insbesondere vollständig gestreut werden.
  2. Scheinwerfervorrichtung (200) nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass die Reihe abgelenkter Lichtsignale aus direkten und/oder indirekten Lichtsignalen gebildet ist.
  3. Scheinwerfervorrichtung (200) nach wenigstens einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass ein oberer Teil des Hauptreflektors (202) wenigstens eine Rippe (209) aufweist, um Lichtsignale zu einem unteren Teil der Projektionslinse (203) abzulenken.
  4. Scheinwerfervorrichtung (200) nach wenigstens einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Ablenkung der von jeder Vorwölbung (206) abgelenkten Lichtsignale radial erfolgt.
  5. Scheinwerfervorrichtung (200) nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass die Streufläche (214) und/oder die Reflexionsfläche (213; 215) gekrümmt sind, um die Lichtsignale im Wesentlichen, insbesondere vollständig über die Breite des ringförmigen Reflektors (205) abzulenken.
  6. Scheinwerfervorrichtung (200) nach wenigstens einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass der ringförmige Reflektor (205) einen parabolischen waagerechten Querschnitt aufweist.
  7. Scheinwerfervorrichtung (200) nach wenigstens einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die vom ringförmigen Reflektor (205) empfangenen, abgelenkten Lichtsignale in eine in der Nähe einer optischen Achse (204) der Scheinwerfervorrichtung (200) liegenden Richtung reflektiert werden.
  8. Scheinwerfervorrichtung (200) nach wenigstens einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass sie eine zusätzliche Lichtquelle zum Erzeugen von Lichtsignalen umfasst, die im Wesentlichen, insbesondere ausschließlich dazu bestimmt sind, von wenigstens einer der Vorwölbungen (206) abgelenkt zu werden.
  9. Scheinwerfervorrichtung (200) nach wenigstens einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass jede Vorwölbung (206) auf einer Austrittsfläche (207) der Projektionslinse (203) angeordnet ist.
  10. Kraftfahrzeug, ausgestattet mit einer Scheinwerfervorrichtung (200) nach wenigstens einem der vorhergehenden Ansprüche.
EP03292834.3A 2002-11-22 2003-11-14 Scheinwerfer für Fahrzeuge mit vergrössertem Beleuchtungsfeld Expired - Lifetime EP1422470B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0214912 2002-11-22
FR0214912A FR2847656B1 (fr) 2002-11-22 2002-11-22 Dispositif projecteur avec plage eclairante elargie

Publications (2)

Publication Number Publication Date
EP1422470A1 EP1422470A1 (de) 2004-05-26
EP1422470B1 true EP1422470B1 (de) 2017-04-12

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Application Number Title Priority Date Filing Date
EP03292834.3A Expired - Lifetime EP1422470B1 (de) 2002-11-22 2003-11-14 Scheinwerfer für Fahrzeuge mit vergrössertem Beleuchtungsfeld

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EP (1) EP1422470B1 (de)
FR (1) FR2847656B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2878020B1 (fr) 2004-11-18 2008-12-19 Valeo Vision Sa Dispositif d'eclairage et/ou de signalisation pour automobile produisant un faisceau lumineux sur le cote d'un vehicule automobile
US9500334B2 (en) * 2013-04-02 2016-11-22 Ichikoh Industries, Ltd. Vehicle lamp having auxiliary lens with main lens
FR3004786B1 (fr) * 2013-04-17 2017-09-08 Valeo Vision Lentille, module optique et dispositif d'eclairage et/ou de signalisation pour vehicule automobile
WO2014184422A1 (en) 2013-05-14 2014-11-20 Ledil Oy A light guide for modifying a light distribution pattern

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4949226A (en) * 1988-06-24 1990-08-14 Koito Seisakusko Co., Ltd. Projector-type lighting device of expanded outline appearance for use as a vehicular headlamp or the like
FR2770618B1 (fr) * 1997-11-04 2000-02-04 Valeo Vision Projecteur du genre elliptique a plage eclairante agrandie
DE19921511A1 (de) * 1999-05-10 2000-11-16 Hella Kg Hueck & Co Scheinwerfer für Fahrzeuge

Non-Patent Citations (1)

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

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Publication number Publication date
FR2847656B1 (fr) 2006-04-14
FR2847656A1 (fr) 2004-05-28
EP1422470A1 (de) 2004-05-26

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