EP0684420A1 - Scheinwerfer mit einer Zweifadenlampe zur Erzeugung eines Abblendlicht- und eines Fernlichtbündels - Google Patents

Scheinwerfer mit einer Zweifadenlampe zur Erzeugung eines Abblendlicht- und eines Fernlichtbündels Download PDF

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Publication number
EP0684420A1
EP0684420A1 EP95401203A EP95401203A EP0684420A1 EP 0684420 A1 EP0684420 A1 EP 0684420A1 EP 95401203 A EP95401203 A EP 95401203A EP 95401203 A EP95401203 A EP 95401203A EP 0684420 A1 EP0684420 A1 EP 0684420A1
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EP
European Patent Office
Prior art keywords
zone
mirror
cut
projector according
filament
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
EP95401203A
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English (en)
French (fr)
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EP0684420B1 (de
Inventor
Kamislav Fadel
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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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP0684420A1 publication Critical patent/EP0684420A1/de
Application granted granted Critical
Publication of EP0684420B1 publication Critical patent/EP0684420B1/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
    • 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
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • F21S41/164—Incandescent light sources, e.g. filament or halogen lamps having two or more filaments

Definitions

  • the present invention relates generally to motor vehicle lighting projectors.
  • It relates more particularly to a new headlamp equipped with a lamp with two filaments, one of which does not have a concealment cup and makes it possible to generate a driving beam, and the other of which includes such a cup, to generate a passing beam such as a European standard beam with "V" cut.
  • a lamp can in particular be a standard lamp called "H4".
  • Such a lamp is generally associated with a paraboloid mirror, the focus of which is placed between the filaments of the lamp.
  • the headlamp further comprises a lens which comprises series of prisms and / or ridges so as to spread the beam generally horizontally and along the inclined part of the cut, so as to obtain good lighting comfort and satisfy the photometry regulations.
  • the Applicant has developed for a few years mirrors which, associated with filaments devoid of a concealment cup, make it possible to generate beams such as a European passing beam, with both good respect for the cut in "V" shape and good lateral spreading of the light.
  • the glass can be smooth or practically smooth, which is advantageous both in terms of its cost price and in aesthetic terms.
  • Document FR-A-2 664 677 teaches in particular a projector of this type.
  • this type of reflecting surface has the vocation, as has been indicated, of cooperating with a filament devoid of a concealment cup, and is considered a priori to be uninteresting when the filament comprises a cup intended to form the cut.
  • lamps with two filaments one of which is associated with a cup, and very particularly the standard lamps "H4", continue to be widely used to form mainly code / route headlamps.
  • the present invention is based on the idea of investigating whether the surfaces defined mathematically, as mentioned above, could be used with profit with a lamp of type "H4" or equivalent, although there is no incentive, and it has been discovered that, thanks to this type of surface, the quality of the beam can be greatly improved.
  • the present invention relates to a motor vehicle headlamp, of the type comprising a lamp with two filaments, the first of which is intended to form a cut-off beam, a concealment cup being associated therewith for this purpose, and the second of which is intended to form an unbroken beam and emits freely around it, a mirror and a closing glass, characterized in that: the mirror comprises a first zone generally extending in the upper part of the mirror and able to cooperate with the first filament to generate by itself, without intervention of the obscuring cup, a beam part defining at least partially the cut , a second zone generally extending in a lateral part of the mirror and able to cooperate with the filament and a homologous edge of the concealment cup to generate a beam part defining another part of the cut, and a third zone s generally extending in the lower part of the mirror and able to cooperate only with the second filament, and the ice is smooth or slightly deviating.
  • a projector which includes a mirror 200 in which is mounted a bifilament lamp 100, a filament of which is provided with a concealment cup.
  • a bifilament lamp 100 a filament of which is provided with a concealment cup.
  • it is a standard lamp "H4" comprising a first filament 101 for passing beam, associated with a concealing cup 103, and behind the passing filament, and slightly offset towards the bottom, a filament 102 for driving beam, devoid of cup.
  • Such a lamp is normally intended to cooperate with a generally paraboloidal mirror, the focus of which is located somewhere between the filaments, the shape of the cup, which extends over approximately 165 ° around the filament 101 below that -ci, determining a European standard "V" cutoff, with an increase in the cutoff angle ⁇ typically 15 ° in the right half of the beam for a right-hand traffic direction.
  • the mirror is not a paraboloid, but it mainly comprises three areas 210, 220, 230 which will be defined below.
  • the first zone 210 is generally located in the upper part of the mirror, and is delimited by two axial planes, namely a plane P1 inclined slightly downwards by an angle denoted ⁇ , below the axial horizontal plane yOy, in the part left of the mirror, and a plane P2 located in the right part of the mirror and inclined upwards by an angle noted ⁇ above the horizontal axial plane yOy.
  • the angle ⁇ is preferably a few degrees (for example 5 to 12 °).
  • the angle ⁇ is preferably slightly greater than ⁇ , and for example of the order of 15 to 25 °.
  • the mirror 200 comprises a second zone 220 occupying the right region of the mirror (in front view) and extending between the above-mentioned plane P2 and a plane P3 constituting here the symmetric of the plane P2 with respect to the axial horizontal plane yOy.
  • the values chosen for the angles ⁇ and ⁇ ensure that all of the radiation coming from the crossing filament 101 (whose impact area on the mirror is illustrated by the non-hatched area in FIG. 1) meets zone 210 or zone 220, as the case may be, by avoiding at least at the level of zone 220 any possible positional defects of the filament 101 or of the cup 103.
  • the mirror comprises a third zone 230 generally extending in the lower part of the mirror and delimited by the planes P1 and P3. It is intended to cooperate only with the road filament 102 (to which the areas 210 and 220 are of course also exposed).
  • the area 210 of the mirror is constituted in the present example by a reflecting surface defined mathematically and capable of generating by itself a beam of a certain width, of great homogeneity and the images of the filament of which are all located below of a European cut normalized (line hHc s ⁇ Document error ⁇ Figures 7a and 7b).
  • the highest points of the images of the filament are located in the vicinity of the cut.
  • the beam width (while retaining a central concentration) is obtained, without damaging the cut, by giving the surface horizontal profiles such that the horizontal deviation imparted to a ray from a reference focal point gradually varies from the center towards the edges, and is at least locally zero.
  • Such a surface is defined mathematically in particular by document FR-A-2 664 677 in the name of the Applicant, to which reference will be made for more details.
  • the preferred position of the reference focal point, denoted Fc, of the reflecting surface of the zone 210 is illustrated. in FIG. 2. It is located a few millimeters behind the crossing filament 101.
  • FIGS. 6a and 4a illustrate the light distribution obtained on a projection screen respectively with the central sub-area 212 and with the lateral sub-area 211a or 211b of the area 210, respectively.
  • Sub-area 212 although it encapsulates images of the filament which are vertical and fairly slightly inclined relative to the vertical, makes it possible to obtain a portion of beam of limited thickness, clearly defining the left half-cut as well than the central beam concentration spot (Figure 4a).
  • Sub-areas 211a and 211b generate images of the filament that are horizontal and not very inclined relative to the horizontal.
  • Figure 6a shows that the corresponding beam part is relatively thin and has a large spread in width, with good homogeneity conducive to visual comfort.
  • the zone 220 of the mirror is essentially intended to contribute, in cooperation with the corresponding edge of the obscuring cup 103, to the formation of the half-cut inclined at 15 °, with a good concentration of light below of this half-cut in the vicinity of the reference center H.
  • This zone 220 can be formed by a paraboloid sector of revolution coaxial with the filament 101 and the focal point of which is preferably in the vicinity of the reference focal point Fc illustrated in the figure 2.
  • Figure 5a illustrates the light distribution of the beam portion obtained.
  • the zone 220 can be produced in accordance with the aforementioned document FR-A-2 664 677, so as to give, in addition to the width, the beam portion generated, while respecting the inclined half-cut Hc which is defined by the corresponding edge of the cup.
  • the reflecting surface of the area 230 of the mirror is preferably produced in accordance with the teachings of the aforementioned document FR-A.
  • it is a surface whose horizontal profile is defined in accordance with this document but whose vertical profile does not cause cutting.
  • it may be a surface causing a cut.
  • the preferred position of the reference zone of the third zone 230 is indicated at Fr in FIG. 2.
  • FIG. 7a illustrates the globally obtained passing beam, without closing glass, with the mirror described above.
  • FIG. 8a illustrates the driving beam obtained, still without closing glass. Because this beam has width and homogeneity, work by the glass may prove to be superfluous, and the latter may be smooth or slightly deflecting.
  • the various zones 210, 220 and 230 of the mirror 200 can be equipped with ridges intended to further improve the homogeneity of the beam.
  • Figures 3 and 3 illustrate such a mirror.
  • the streaks S1 and S3 located respectively in the zones 210 and 230 are preferably all vertical.
  • the streaks S2 situated in the zone 220 preferably each consist of a vertical portion S2a extending downward from the transition plane P2, and of a portion S2b having an inclination of 10 to 20 ° relative to vertical, extending upward from the transition plane P3.
  • these streak portions are connected to each other continuously by curved connection zones S2c.
  • these streaks are designed flat, zone by zone, with rays of streaks which can change progressively over their length, depending on the deviation sought, and then projected onto the reflecting surface of the mirror.
  • One objective of these streaks is to attenuate the light defect below the reference center H (see FIG. 7a), light defect due to the significant defocusing of the source with respect to the focal point Fc of zones 210 and 220.
  • FIG. 3 illustrates a preferred example of arrangement of the different streaks.
  • Each streak can have two different rays at its two ends. In this case, this radius varies continuously between said ends.
  • Figures 4b to 8b are the counterparts of Figures 4a to 8a, obtained with the ridged mirror as defined above.
  • FIG. 5b shows that, thanks to the S2 double-inclination streaks, the light is spread on the one hand along the inclined half-cut Hc (thanks to the streak portions inclined at about 15 °), and on the other hand along the horizontal half-cut (thanks to the vertical streak portions).
  • Figure 6b also shows that the light defect appearing in the central region of Figure 6a has been filled.
  • FIG. 7b shows, as a result of all of the above, a spot of central concentration of excellent shape and homogeneity, and a very good definition of the cut-off standardized in "V" over a large width.
  • FIG. 8b shows that the driving beam has an improved shape concentration spot.
  • any other type of headlamp comprising a lamp with two filaments, one of which is associated with a cup, in order to selectively produce a cut beam and an uncut beam.
  • the mirror designed according to the present invention may have in certain areas optical surfaces in which the ridges are superfluous.
  • decor streaks can be provided in these areas, that is to say streaks having no optical role but making it possible to obtain homogeneity appearance of the mirror.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP95401203A 1994-05-26 1995-05-23 Scheinwerfer mit einer Zweifadenlampe zur Erzeugung eines Abblendlicht- und eines Fernlichtbündels Expired - Lifetime EP0684420B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9406376 1994-05-26
FR9406376A FR2720476B1 (fr) 1994-05-26 1994-05-26 Projecteur comportant une lampe à deux filaments pour engendrer un faisceau coupé et un faisceau non coupé.

Publications (2)

Publication Number Publication Date
EP0684420A1 true EP0684420A1 (de) 1995-11-29
EP0684420B1 EP0684420B1 (de) 1999-09-08

Family

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EP95401203A Expired - Lifetime EP0684420B1 (de) 1994-05-26 1995-05-23 Scheinwerfer mit einer Zweifadenlampe zur Erzeugung eines Abblendlicht- und eines Fernlichtbündels

Country Status (3)

Country Link
EP (1) EP0684420B1 (de)
DE (1) DE69511935T2 (de)
FR (1) FR2720476B1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744518A1 (fr) * 1996-02-01 1997-08-08 Bosch Gmbh Robert Phare de longue portee pour vehicules a moteur
EP0791779A2 (de) * 1996-02-23 1997-08-27 Hella KG Hueck & Co. Kraftfahrzeugscheinwerfer für Abblend- und Fernlicht und Lampe
DE19747314A1 (de) * 1996-11-08 1998-05-14 Valeo Vision Kraftfahrzeugscheinwerfer mit einer Entladungslampe mit Abdeckelementen und einem Mehrzonen-Reflektor
DE19805216A1 (de) * 1997-02-21 1998-08-27 Valeo Vision Scheinwerfer mit einer Zweifadenlampe zur Erzeugung eines Lichtbündels mit Helldunkel-Grenze und eines Lichtbündels ohne Helldunkel-Grenze
FR2762380A1 (fr) * 1997-04-18 1998-10-23 Autopal Np Projecteur pour vehicule automobile
DE19718336A1 (de) * 1997-04-30 1998-11-05 Hella Kg Hueck & Co Reflektor für einen Fahrzeugscheinwerfer
FR2782149A1 (fr) * 1998-08-10 2000-02-11 Valeo Vision Projecteur de vehicule automobile pourvu d'une lampe a deux filaments et d'un miroir perfectionnes
FR2782148A1 (fr) * 1998-08-10 2000-02-11 Valeo Vision Projecteur de vehicule automobile pourvu d'une lampe a deux filaments et d'un miroir perfectionnes
AT413753B (de) * 1999-08-16 2006-05-15 Zizala Lichtsysteme Gmbh Fahrzeugscheinwerfer
EP1382900B2 (de) † 2002-07-15 2009-10-21 Valeo Vision Kraftfahrzeugscheinwerfer mit einer Zweifadenlampe

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2760067B1 (fr) * 1997-02-21 1999-05-14 Valeo Vision Projecteur de vehicule automobile a miroir a zones juxtaposees lateralement, et procede de fabrication d'un tel miroir
FR2818210B1 (fr) 2000-12-20 2003-04-11 Valeo Vision Projecteur tournant pour vehicule automobile comportant une lampe a deux sources
DE102012006505A1 (de) * 2012-03-29 2013-10-02 GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) Streulichtscheibe für einen Scheinwerfer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3742191A1 (de) * 1987-12-12 1989-06-22 Hella Kg Hueck & Co Abblendbarer fahrzeugscheinwerfer
US5055981A (en) * 1989-02-17 1991-10-08 Koito Manufacturing Co., Ltd. Automotive projector type headlight
EP0581679A1 (de) * 1992-07-30 1994-02-02 Valeo Vision Kfz-Scheinwerfer mit einer Zweifaden-Glühlampe zur selektiven Erzeugung von Nebel- und Fernlicht

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3742191A1 (de) * 1987-12-12 1989-06-22 Hella Kg Hueck & Co Abblendbarer fahrzeugscheinwerfer
US5055981A (en) * 1989-02-17 1991-10-08 Koito Manufacturing Co., Ltd. Automotive projector type headlight
EP0581679A1 (de) * 1992-07-30 1994-02-02 Valeo Vision Kfz-Scheinwerfer mit einer Zweifaden-Glühlampe zur selektiven Erzeugung von Nebel- und Fernlicht

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744518A1 (fr) * 1996-02-01 1997-08-08 Bosch Gmbh Robert Phare de longue portee pour vehicules a moteur
EP0791779A2 (de) * 1996-02-23 1997-08-27 Hella KG Hueck & Co. Kraftfahrzeugscheinwerfer für Abblend- und Fernlicht und Lampe
EP0791779A3 (de) * 1996-02-23 1999-02-10 Hella KG Hueck & Co. Kraftfahrzeugscheinwerfer für Abblend- und Fernlicht und Lampe
DE19747314A1 (de) * 1996-11-08 1998-05-14 Valeo Vision Kraftfahrzeugscheinwerfer mit einer Entladungslampe mit Abdeckelementen und einem Mehrzonen-Reflektor
DE19747314B4 (de) * 1996-11-08 2014-05-22 Valeo Vision Kraftfahrzeugscheinwerfer mit einer Entladungslampe mit Abdeckelementen und einem Mehrzonen-Reflektor
DE19805216A1 (de) * 1997-02-21 1998-08-27 Valeo Vision Scheinwerfer mit einer Zweifadenlampe zur Erzeugung eines Lichtbündels mit Helldunkel-Grenze und eines Lichtbündels ohne Helldunkel-Grenze
FR2762380A1 (fr) * 1997-04-18 1998-10-23 Autopal Np Projecteur pour vehicule automobile
DE19718336A1 (de) * 1997-04-30 1998-11-05 Hella Kg Hueck & Co Reflektor für einen Fahrzeugscheinwerfer
FR2782149A1 (fr) * 1998-08-10 2000-02-11 Valeo Vision Projecteur de vehicule automobile pourvu d'une lampe a deux filaments et d'un miroir perfectionnes
FR2782148A1 (fr) * 1998-08-10 2000-02-11 Valeo Vision Projecteur de vehicule automobile pourvu d'une lampe a deux filaments et d'un miroir perfectionnes
AT413753B (de) * 1999-08-16 2006-05-15 Zizala Lichtsysteme Gmbh Fahrzeugscheinwerfer
EP1382900B2 (de) † 2002-07-15 2009-10-21 Valeo Vision Kraftfahrzeugscheinwerfer mit einer Zweifadenlampe

Also Published As

Publication number Publication date
EP0684420B1 (de) 1999-09-08
DE69511935D1 (de) 1999-10-14
FR2720476B1 (fr) 1996-08-09
DE69511935T2 (de) 2000-01-20
FR2720476A1 (fr) 1995-12-01

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