EP1467143B1 - Kfz-Scheinwerfer mit Mitteln zur horizontalen Aufweitung des Lichtsbündels - Google Patents

Kfz-Scheinwerfer mit Mitteln zur horizontalen Aufweitung des Lichtsbündels Download PDF

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Publication number
EP1467143B1
EP1467143B1 EP04290889A EP04290889A EP1467143B1 EP 1467143 B1 EP1467143 B1 EP 1467143B1 EP 04290889 A EP04290889 A EP 04290889A EP 04290889 A EP04290889 A EP 04290889A EP 1467143 B1 EP1467143 B1 EP 1467143B1
Authority
EP
European Patent Office
Prior art keywords
headlight
light
globally
transversely
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.)
Expired - Lifetime
Application number
EP04290889A
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English (en)
French (fr)
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EP1467143A1 (de
Inventor
Norbert Brun
Antoine De Lamberterie
Médéric Heurtier
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 EP1467143A1 publication Critical patent/EP1467143A1/de
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Publication of EP1467143B1 publication Critical patent/EP1467143B1/de
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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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
    • F21S41/28—Cover glass

Definitions

  • the present invention relates to a motor vehicle lighting projector.
  • the present invention more particularly relates to a motor vehicle lighting headlamp which is intended to produce a regulatory lighting beam, comprising a light source which is placed generally at the intersection between a longitudinal optical axis and a transverse optical axis, and which produces a light beam of which at least one so-called lateral part is transmitted transversely transversely to one side and a protective glass which is arranged at the front of the headlamp, the headlamp comprising a convergent dioptric element whose optical axis is substantially transversely aligned with the light source, so as to receive the lateral portion of the light beam on its input face and so as to channel the lateral portion in a generally transverse direction oriented towards the side.
  • a projector of this type is known, for example, documents FR 35133 E or EP 1179705 A1 .
  • the invention aims to provide a lighting projector that can be arranged in such a housing and that can achieve a regulatory lighting beam.
  • the lighting fixture shall also have the most uniform illuminating surface possible, ie the luminance the headlamp must be substantially homogeneous over its entire front surface.
  • the front surface of the lighting projector must be able to stand in a height of 50 millimeters and in a width of 300 millimeters.
  • the invention proposes a lighting projector of the type described above, characterized in that it comprises an associated reflecting element comprising a diverging optical surface which is arranged generally facing the exit face of the dioptric element. convergent, and which is provided to reflect the lateral channeled part of the light beam generally towards the front, so as to spread transversely the light beam on the rear face of the protective glass, in that the light source is a linear filament which is arranged generally along the longitudinal optical axis, so that the regulatory lighting beam is formed essentially by filament images oriented substantially transversely, and in that the reflective element is generally convex towards the front and globally the shape of a cylinder portion, the cylinder having a substantially vertical axis.
  • FIG 1 there is shown schematically a lighting projector 10 of a motor vehicle which is made according to the teachings of the invention.
  • the projector 10 is provided to produce a regulatory lighting beam oriented towards the front, generally along a longitudinal optical axis A-A which is substantially parallel to the longitudinal axis of the vehicle.
  • the forward orientation corresponds globally to a left-to-right orientation, along the longitudinal axis AA, considering Figure 1.
  • the regulatory lighting beam is for example a flat cut beam, such as a fog light, or a beam of driving light.
  • the projector 10 here comprises a housing 12 which is delimited by an upper horizontal wall 14, a lower horizontal wall 16, a vertical rear wall 18 and a protective front window 20.
  • FIG. 1 the upper horizontal wall 14 is shown exploded with respect to the rest of the housing 12.
  • the projector 10 comprises a light source 22 which is arranged inside the housing 12.
  • the light source 22 is here formed by a filament lamp 26 which extends substantially longitudinally inside the housing 12, through a mounting hole 28 formed in the rear wall 18 of the housing 12.
  • the filament 26 is arranged generally on the longitudinal axis A-A, at the intersection between the longitudinal axis A-A and a transverse direction B-B.
  • the projector 10 comprises two convergent dioptric elements, left and right respectively 32, which are arranged on either side of the filament 26, and which are aligned transversely with the filament 26.
  • the convergent dioptric elements 30, 32 here are lenses, for example aspherical, whose optical axes are substantially coincident with the transverse direction B-B.
  • each lens 30, 32 is arranged facing the filament 26.
  • the exit surface 36 of the left lens 30 is oriented to the left, and the exit surface 36 of the right lens 32 is arranged to the right.
  • the projector 10 also comprises a left reflective element 38 and a right reflective element 40 which are each associated respectively with one of the two lenses 30, 32.
  • the reflecting elements 38, 40 are here vertical mirrors in the form of substantially cylindrical portion of vertical axis.
  • Each mirror 38, 40 has a diverging reflecting surface 42 which is generally convex towards the front and which is arranged transversely facing the outlet face 36 of the associated lens 30, 32.
  • the mirrors 38, 40 here constitute two lateral end portions of the rear wall 18 of the housing 12.
  • the mirrors 38, 40 may therefore be formed by depositing a reflective material, such as aluminum, on the internal face of the associated portions of the housing 12.
  • Each mirror 38, 40 delimits here, in a horizontal plane, a curved profile, whose ends are offset transversely, so that each mirror 38, 40 has a vertical rear edge 44 which is close to the associated lens 30, 32, and a vertical front edge 46 which is remote from the associated lens 30, 32.
  • the projector 10 comprises a reflector 48 of longitudinal optical axis A-A, which is substantially longitudinally aligned with the filament 26, and which is arranged at the rear of the filament 26.
  • the reflector 48 is here of the complex surface type. It comprises a reflection front surface 50 of generally parabolic concave shape.
  • the reflector 48 is here formed in a central portion of the rear wall 18 of the housing 12.
  • Figure 2 shows only the main optical elements of the projector 10, and the filament 26 is likened to a point light source.
  • the light source 22 is represented in the form of a rectangle which symbolizes the filament 26 of the lamp 24 of FIG.
  • the filament 26 produces a light beam consisting of light rays emitted globally in all directions.
  • a right lateral portion of the light beam is received by the input face 34 of the right lens 32, which channels this portion of the beam in a generally transverse direction oriented to the right.
  • the filament 26 is arranged at the focus of the right lens 32, so that the right lens 32 then functions as a collimator which transmits the light rays received on its input face 34, in a direction parallel to the transverse direction BB, to the right.
  • the channeled beam is reflected on the reflecting wall 42 of the right mirror 40, which reflects the light rays forward, transversely spreading the light beam on the rear face 52 of the protective glass 20.
  • the left side portion of the light beam, which is received on the input face 34 of the left lens 30, is reflected by the left mirror 38 forwards on the rear face 52 of the protective glass 20. .
  • the reflection surface 42 of each mirror 38, 40 comprises a plurality of circumferential portions, or vertical ridges 54, of different profiles, so as to spread the transverse light beam as much as possible by distributing in a substantially homogeneous manner the light rays on the face rear 52 of the protective glass 20.
  • the rear reflector 48 makes it possible to reflect forwards the light rays emitted backwards by the filament 26. It contributes to homogeneously distributing the light rays on the rear face 52 of the protective glass 20.
  • the reflection surface 50 of the rear reflector 48 can be optimized to form a lighting beam having a cut.
  • the light rays received on the rear face 52 of the protective glass 20 refract through the protective glass 20, forward and they produce at the front a regulatory lighting beam F.
  • the images of the filament 26 which are emitted forwards by the lateral optical systems, that is to say by the associated lens / mirror systems, are oriented substantially horizontally on a screen placed at the front of the projector 10. Therefore, it is easy to make a flat-cut regulatory beam, such as a fog beam, by aligning the images of the filament 26 along and below a transverse line forming the flat cut.
  • a flat-cut regulatory beam such as a fog beam
  • the alignment of the images can be conveniently achieved, for example by optimizing the vertical profile of the mirrors 38, 40 and vertical streaks 54.
  • the shape of the illumination beam produced by the projector 10, in particular the transverse spreading of this beam, can be optimized by appropriately selecting the value of the focal length of each lens 30, 32 and choosing the position of the filament 26 on the transverse axis BB relative to the focus of each lens 30, 32.
  • FIG. 3 schematically illustrates the positioning of the filament 26 with respect to the right lens 32 for the production of a regulatory lighting beam of the fog lamp type.
  • the angle ⁇ 1 represents the numerical aperture of the lens 32 with respect to the filament 26, which determines the amount of luminous flux received by the lens 32 on its input surface 34.
  • the distance T1 represents the transverse distance, or draw, between the filament 26 and the input surface 34 of the lens 32.
  • the draw (T2> T1) is increased by compared to the previous embodiment relating to the fog.
  • the increase of the print makes it possible to obtain images of the smaller filament 26, at the exit of the lens 32, which facilitates the concentration of the luminous flux along the optical axis A-A, for the production of the beam of high beam.
  • the increase in the draw T2 results in a decrease in the numerical aperture, thus a decrease in the luminous flux received by the lens 32.
  • the lens 32 is truncated in its upper part and in its lower part, which makes it possible to minimize its vertical bulk, despite the increase in the diameter of the lens 32, to make a projector 10 of low height.
  • the value of the numerical aperture ⁇ 3 in the vertical transverse plane is smaller than the numerical aperture value ⁇ 1, but the numerical aperture value ⁇ 2 does not change. in the horizontal transverse plane.
  • FIG. 6 shows a second embodiment of the projector 10 according to the invention, in which vertical streaks 56 are arranged, not on the mirrors 38, 40, but on the rear face 52 of the protective glass 20, so as to spread transversely the light beam passing through the ice 20.
  • the vertical streaks 56 may be arranged only in a central zone of the rear face 52 of the protective glass 20 which is located generally facing the reflector 48.
  • FIG. 7 shows a third embodiment of the projector 10 according to the invention, in which the mirrors 38, 40 are plane mirrors which have vertical ridges 54 on their internal reflection face 42.
  • This embodiment is distinguished from the embodiment of Figures 1 and 2 by replacing cylindrical mirrors 38, 40 by planar mirrors.
  • Each plane mirror 38, 40 is substantially vertical and is inclined with respect to the longitudinal direction A-A and with respect to the transverse direction B-B.
  • the aspherical lenses 30, 32 can be replaced by other types of lenses, for example by semi-cylindrical type lenses whose axis of each half-cylinder is parallel to the longitudinal axis AA.
  • the inner faces of the upper 14 and lower 16 walls may comprise reflection facets that collect the light rays emitted by the filament 26, respectively upwardly and downwardly. , and which reflect these light rays towards the rear face 52 of the protective glass 20.
  • reflection facets only on the inner face of a single wall, upper 14 or lower 16, for example on the inner face of the upper wall 14, in the case of a projector 10 realizing a fog light.
  • Such reflection facets make it possible to increase the luminous efficiency of the projector 10.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (12)

  1. Kraftfahrzeugscheinwerfer (10), der zum Erzeugen eines vorschriftsmäßigen Lichtbündels (F) vorgesehen ist, mit einer Lichtquelle (26), die allgemein am Schnittpunkt einer optischen Längsachse (A-A) mit einer optischen Querachse (B-B) angeordnet ist und die ein Lichtbündel erzeugt, von dem wenigstens ein sogenannter seitlicher Teil allgemein quer zu einer Seite hin emittiert wird, und einer Schutzscheibe (20), die an der Vorderseite des Scheinwerfers (10) angeordnet ist, wobei der Scheinwerfer ein konvergierendes dioptrisches Element (30, 32) umfasst, dessen optische Achse (B-B) im Wesentlichen quer zur Lichtquelle (26) solchermaßen ausgerichtet ist, dass der seitliche Teil des Lichtbündels auf seiner Eintrittsseite (34) auftrifft und der seitliche Teil in einer zur Seite hin gerichteten allgemein quer verlaufenden Richtung (B-B) kanalisiert wird,
    dadurch gekennzeichnet, dass er ein zugehöriges reflektierendes Element (38, 40) umfasst, mit einer divergierenden optischen Oberfläche (42), die allgemein gegenüber der Austrittsseite (36) des konvergierenden dioptrischen Elements (30, 32) angeordnet ist und dazu vorgesehen ist, den kanalisierten seitlichen Teil des Lichtbündels allgemein nach vorne zu reflektieren, um das Lichtbündel auf der Rückseite (52) der Schutzscheibe (20) quer aufzufächern, dass die Lichtquelle (26) ein geradliniger Glühfaden ist, der allgemein entlang der optischen Längsachse (A-A) solchermaßen angeordnet ist, dass das vorschriftsmäßige Lichtbündel (F) hauptsächlich durch die im Wesentlichen quer ausgerichteten Abbildungen des Glühfadens (26) gebildet wird, und dass das reflektierende Element (38, 40) allgemein nach vorne konvex ist und allgemein die Form eines Zylinderstücks hat, wobei der Zylinder eine im Wesentlichen senkrechte Achse hat.
  2. Scheinwerfer (10) nach Anspruch 1,
    dadurch gekennzeichnet, dass die Lichtquelle (26) zwischen dem Brennpunkt des konvergierenden dioptrischen Elements (30, 32) und der Eintrittsseite (34) des dioptrischen Elements (30, 32) angeordnet ist.
  3. Scheinwerfer (10) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass das konvergierende dioptrische Element (30, 32) eine Linse ist.
  4. Scheinwerfer (10) nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass die Linse (30, 32) asphärisch ist.
  5. Scheinwerfer (10) nach Anspruch 3,
    dadurch gekennzeichnet, dass die Linse (30, 32) halbzylindrisch ist, wobei der Zylinder eine im Wesentlichen längsgerichtete Achse hat.
  6. Scheinwerfer (10) nach einem der Ansprüche 3 bis 5,
    dadurch gekennzeichnet, dass die Linse (30, 32) ein oberes abgestumpftes Stück und/oder ein unteres abgestumpftes Stück aufweist, um die Höhe der Linse (30, 32) für eine gegebene Brennweite zu verringern.
  7. Scheinwerfer (10) nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet, dass das reflektierende Element (38, 40) ein senkrechter Planspiegel ist, der bezüglich der Längsrichtung (A-A) und bezüglich der Querrichtung (B-B) geneigt ist.
  8. Scheinwerfer (10) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die reflektierende Vorrichtung (38, 40) senkrechte Rippen (54) aufweist, die dazu vorgesehen sind, den reflektierten Teil des Lichtbündels quer aufzufächern.
  9. Scheinwerfer (10) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass er einen Reflektor (48) mit einer optischen Längsachse (A-A) umfasst, die im Wesentlichen längs mit der Lichtquelle (26) ausgerichtet ist, und der an der Rückseite der Lichtquelle (26) angeordnet ist, um die allgemein längs nach hinten emittierten Lichtstrahlen auf die Rückseite (52) der Schutzscheibe (20) zu verteilen.
  10. Scheinwerfer (10) nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass der Reflektor (48) eine komplexe Oberfläche hat und vorne allgemein konkav parabolförmig ist.
  11. Scheinwerfer (10) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass das durch die Lichtquelle (26) erzeugte Lichtbündel einen rechten Seitenteil, der allgemein quer zur rechten Seite hin emittiert wird, und einen linken Seitenteil, der allgemein quer zur linken Seite hin emittiert wird, aufweist, und dass der Scheinwerfer (10) zwei konvergierende dioptrische Elemente (30, 32) und zwei zugehörige reflektierende optische Elemente (38, 40) umfasst, die auf beiden Seiten der Lichtquelle (26) quer angeordnet sind.
  12. Scheinwerfer (10) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Schutzscheibe (20) senkrechte Rippen (56) aufweist, die dazu vorgesehen sind, das vorschriftsmäßige Lichtbündel (F) quer aufzufächern.
EP04290889A 2003-04-08 2004-04-02 Kfz-Scheinwerfer mit Mitteln zur horizontalen Aufweitung des Lichtsbündels Expired - Lifetime EP1467143B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0304426A FR2853718B1 (fr) 2003-04-08 2003-04-08 Projecteur d'eclairage pour vehicule automobile comportant des moyens pour etaler transversalement le faisceau lumineux
FR0304426 2003-04-08

Publications (2)

Publication Number Publication Date
EP1467143A1 EP1467143A1 (de) 2004-10-13
EP1467143B1 true EP1467143B1 (de) 2007-07-04

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Family Applications (1)

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EP04290889A Expired - Lifetime EP1467143B1 (de) 2003-04-08 2004-04-02 Kfz-Scheinwerfer mit Mitteln zur horizontalen Aufweitung des Lichtsbündels

Country Status (5)

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EP (1) EP1467143B1 (de)
AT (1) ATE366390T1 (de)
DE (1) DE602004007318T2 (de)
ES (1) ES2289451T3 (de)
FR (1) FR2853718B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2887997B1 (fr) * 2005-06-30 2008-04-11 Valeo Vision Sa Embout de guide optique a etalement des rayons lumineux
DE102012006505A1 (de) * 2012-03-29 2013-10-02 GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) Streulichtscheibe für einen Scheinwerfer
DE102015006258B4 (de) 2015-05-15 2017-01-26 Friedrich Grimm Scheinwerfer mit einem umgelenkten strahlengang
WO2021069374A1 (en) * 2019-10-10 2021-04-15 Signify Holding B.V. A lighting device
WO2022143331A1 (zh) * 2020-12-31 2022-07-07 欧普照明股份有限公司 光学模组及灯具

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR35133E (fr) * 1928-03-28 1929-12-03 Perfectionnements apportés aux phares d'automobiles non éblouissants
FR674139A (fr) * 1928-04-27 1930-01-23 Projecteur pour véhicules automobiles
FR36397E (fr) * 1929-01-11 1930-05-10 Perfectionnements apportés aux phares d'automobiles non éblouissants
FR2621679B1 (fr) * 1987-10-13 1990-02-09 Cibie Projecteurs Projecteur de route de faible hauteur a grande recuperation de flux pour vehicule automobile
FR2729740B1 (fr) * 1995-01-19 1997-04-18 Valeo Vision Projecteur de vehicule automobile comportant des moyens dioptriques interposes entre la source et le miroir
DE19704467B4 (de) * 1997-02-06 2006-07-20 Automotive Lighting Reutlingen Gmbh Fahrzeug-Scheinwerfer
US6361191B1 (en) * 1998-09-29 2002-03-26 Jerome H. Simon Off-axis and segment collimation and projection
JP3390412B2 (ja) * 2000-08-07 2003-03-24 株式会社キャットアイ ヘッドランプ

Also Published As

Publication number Publication date
DE602004007318T2 (de) 2008-03-06
ATE366390T1 (de) 2007-07-15
ES2289451T3 (es) 2008-02-01
EP1467143A1 (de) 2004-10-13
DE602004007318D1 (de) 2007-08-16
FR2853718B1 (fr) 2005-09-23
FR2853718A1 (fr) 2004-10-15

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