EP0933585A1 - Kfz-Scheinwerfer mit einer querliegenden Lichtquelle und zum Erzeugen von einer scharfen Lichtbegrenzung - Google Patents

Kfz-Scheinwerfer mit einer querliegenden Lichtquelle und zum Erzeugen von einer scharfen Lichtbegrenzung Download PDF

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Publication number
EP0933585A1
EP0933585A1 EP99400178A EP99400178A EP0933585A1 EP 0933585 A1 EP0933585 A1 EP 0933585A1 EP 99400178 A EP99400178 A EP 99400178A EP 99400178 A EP99400178 A EP 99400178A EP 0933585 A1 EP0933585 A1 EP 0933585A1
Authority
EP
European Patent Office
Prior art keywords
mirror
source
projector according
horizontal
generator
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
EP99400178A
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English (en)
French (fr)
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EP0933585B1 (de
Inventor
Benoit Reiss
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
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP0933585A1 publication Critical patent/EP0933585A1/de
Application granted granted Critical
Publication of EP0933585B1 publication Critical patent/EP0933585B1/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
    • F21S41/335—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with continuity 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
    • F21S41/10—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
    • F21S41/17—Discharge light sources
    • F21S41/173—Fluorescent light sources

Definitions

  • the present invention relates generally motor vehicle headlamps.
  • mirror projectors of the genre parabolic or self-generating beam surface with cut-off generally have, at least at least level of said mirror, a substantially greater width at their height.
  • obtaining a light beam of good quality imposes, especially to give it a peak of concentration in the axis of the road, build the beam with a significant proportion images of the light source (typically the filament of an incandescent lamp or the arc of a lamp discharge), which are small, and this requires so to design a mirror with areas extending as far as possible from the source, and for the reasons above mentioned dimensions, these zones cannot in the practice be distant from the source only in a lateral direction.
  • the light source typically the filament of an incandescent lamp or the arc of a lamp discharge
  • the large expanse of the mirror above and below the source will spawn in this case, with an axial source, a significant proportion images that are strongly inclined to the horizontal, that is to say slightly inclined with respect to the vertical, and this will contribute in the first place to degrade the quality of the cut, secondly to illuminate the road too close to the vehicle, and thirdly to make it difficult to obtain a beam of good width.
  • This section is defined for its upper part by a piece of 20h dish focused at a fixed point Fh (or "high focus") located behind the filament 10, and for its lower part by another piece of dish 20b focused at another fixed point Fb (or “Low focus”) located in front of the filament 10.
  • Fh fixed point
  • Fb fixed point
  • Such sections inevitably lead to generate filament images which either overflow towards the top above a horizontal cut defined at the intersection of the y-y axis with a projection screen, and materialized in "C” in Figure 1 (notably an image I1 emitted by the upper part of the mirror), either are excessively shifted down relative to at cut C (in particular case of an I2 image generated through an intermediate region of the lower part of the mirror).
  • the projector described in this document is only suitable for generating a fog beam at flat cut, and nothing indicates or suggests in this document how a beam could be made with more complex cut-off, in particular a beam of European or American type crossing.
  • the mirror described in this prior art is unable to give the light beam by itself a substantial width, and therefore it's impossible to use glass without optical elements light spreading, which is frequently desired by stylists.
  • the present invention therefore aims to overcome these limitations of the state of the art and to allow make a projector whose mirror can present reduced width compared to spotlights conventional, and a height at least equal to this width, while overcoming these limitations.
  • the present invention provides a projector motor vehicle as defined in the claim 1.
  • FIG. 2 and 3 we have depicted components of a vehicle headlamp automotive, namely the generally cylindrical filament 10 of his lamp and his mirror 20.
  • the other elements of the headlamp namely housing, closing glass and different auxiliary equipment, have not been represented and are classic in themselves.
  • Source could, alternatively, be constituted for example by the generally cylindrical arc of a discharge lamp.
  • the axis of the filament 10 extends, according to a first important characteristic of the invention, horizontally and perpendicular to the optical axis y-y from the mirror. It can typically be either the filament transverse of an H3 standard lamp mounted axially at the bottom of the mirror, or the axial filament of an H1 lamp or H7 mounted laterally in the mirror.
  • the high and low vertical generators, 20h and 20b respectively, of the mirror 20 are designed to so as to bring all the images of the filament 10 to the level of the horizontal level, so as to be able to generate, as will be seen in detail below, beams at good quality clean cut.
  • the generators are built in drawing lines D1 tangent to the surface of the filament 10, these straight lines being on the rear side of the filament for the upper generator 20h, and finding on the front side of the filament as far as the generator 20b.
  • each of these lines D1 corresponding to a light ray emitted by an edge of the filament 10, are respectively associated with lines D2 parallel to the optical axis y-y of the mirror, which itself is substantially parallel to the axis of the vehicle.
  • Each generator is built up close close, starting from the bottom of the mirror 20 which is fixed at a predetermined dimension relative to the filament, from different lines TG obtained, to define a curved line, which will be called in the following "Evolutionary generator” insofar as it does not does not have a fixed hearth, but a set of hearths that evolve gradually as you move along said generator.
  • Evolutionary generator insofar as it does not does not have a fixed hearth, but a set of hearths that evolve gradually as you move along said generator.
  • each image of the filament 10 that they generate is located immediately below and flush with a horizontal cut that passes by the y-y axis.
  • this horizontal generator a parabolic look, with a focus that can either be centered on the filament 10, or preferably offset laterally with respect to this one, and we drag the vertical generator described above along this generator horizontal, this sliding consisting of a translation without rotation of said vertical generator (i.e. that it remains parallel to the plane y0z.) along the horizontal generator.
  • Figure 4 shows by isocandela curves the general appearance of a beam which would be obtained with the parabolic vertical half-generators of the Figure 1, and we observe in particular, in the region central, a light fault immediately below cut-off c-c, which is explained by the presence in this region of filament images whose most point top is shifted down relative to the cut, and in the lateral regions, an overflow of light above this cut, which is explained by the presence of images whose highest point is located above this cut.
  • FIG. 5 which illustrates the pace of a beam which is going to be obtained on the one hand with the generator of the invention illustrated in FIG. 2, and on the other hand with a horizontal generator made up by two focused left and right half-parabolas respectively in the vicinity of the left ends and right of filament 10, shows that the cut c-c is defined practically over the entire width of the beam.
  • Figures 6 and 7 illustrate the plots of images obtained with a mirror as defined above in terms horizontal generator and vertical generator, for a defocus ⁇ F equal to approximately half of the length of the filament, about 2 mm for a filament 4 mm long, and for a mirror of height of 150 mm and width of 80 mm, in which the filament 10 is placed at mid-height.
  • the horizontal images of the filament all come to place immediately below the cutoff (i.e. horizontal level 0%), while tilted images are positioned with their point on higher located substantially on this cut.
  • a mirror for fog beam can be obtained using a horizontal generator formed by a straight line perpendicular to the y-y axis.
  • the mirror therefore has a reflecting surface cylindrical which will have the property of generating filament images which are all located below and at the cutting edge, and which at the same time are strongly offset laterally from the center of the beam.
  • the thickness of the beam will be independent of the height of the mirror. Indeed, the more we extend the mirror upwards or down plus the size of the filament images generated is reduced, these images remaining aligned below of the cut. So we understand that we can play on the height of the mirror to control the light concentration immediately below the break.
  • a passing beam conforming to regulations Europeans is preferably generated by dividing the mirror 20 in different areas as illustrated in the figure 11.
  • the mirror has half upper 21 and lower half 22, which have each nine zones, respectively 211 to 219 and 221 to 229.
  • the different zones have relatively similar widths, and typically between 6 and 13 mm, and are characterized for the essential by horizontal generators different, defined according to the lateral offset and of the desired spread of light.
  • central zones 215 and 225 which generate filament 10 images that are horizontal or very slightly inclined with respect to the horizontal, are intended to perform the horizontal cut over an area important.
  • Their horizontal generator is advantageously a straight line.
  • the other areas of the mirror are used to ensure a satisfactory light distribution of the light in the different areas of the beam.
  • the other areas may possibly present, depending on the function which is assigned to them, surfaces of different types, and in particular surfaces derived from the teachings of documents FR-A-2 536 502, FR-A-2 536 503, FR-A-2 602 305, FR-A-2 602 306, FR-A-2 609 146, FR-A-2 609 148, FR-A-2 639 888, FR-A-2 664 677 and FR-A-2 710 393, on behalf of the Applicant.
  • the generated beam has a reduced thickness
  • This allows to influence the positioning of the images in relation to the cut, and in particular to achieve a less clear cut, desirable in some cases.
  • we move some images down while others remain aligned under the cut so we can thicken the beam and / or move its area down maximum concentration.
  • Figures 12 to 20 illustrate by sets of isocandela curves the beam parts that are generated respectively by zones 214, 213, 212, 211, 216, 217, 218, 219 and 215 of the mirror of FIG. 11, while Figures 21 and 22 illustrate the pace obtained by superimposing the parts of beam of figures 12 to 15 and the beam parts Figures 16 to 19.
  • Figure 23 illustrates the appearance of the beam generated by the upper half of the mirror Figure 11, while Figure 24 illustrates the pace of the beam part generated by its half lower.
  • Figure 25 illustrates the beam pattern overall obtained. We observe that it is a beam having all the qualities required in terms of width, thickness and concentration in the axis of the road.
  • the present invention makes it possible, thanks to the use of a transverse source and generators verticals as described above, mirrors likely to generate by themselves, or with the intervention of optical elements on the ice of closure, projectors whose width is significantly lower than the height.
  • the ratio between height and width can be between 1.2: 1 and 4: 1.
  • the generator horizontal of the mirror can be designed to perform or not a spread of light in width.
  • this spreading can be achieved by ice streaking.
  • We can also perform a combined spread by the mirror and by ice.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP99400178A 1998-01-28 1999-01-26 Kfz-Scheinwerfer mit einer querliegenden Lichtquelle und zum Erzeugen von einer scharfen Lichtbegrenzung Expired - Lifetime EP0933585B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9800905 1998-01-28
FR9800905A FR2774150B1 (fr) 1998-01-28 1998-01-28 Projecteur a source transversale pour vehicule automobile, susceptilble d'emettre un faisceau a coupure nette

Publications (2)

Publication Number Publication Date
EP0933585A1 true EP0933585A1 (de) 1999-08-04
EP0933585B1 EP0933585B1 (de) 2008-01-09

Family

ID=9522258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99400178A Expired - Lifetime EP0933585B1 (de) 1998-01-28 1999-01-26 Kfz-Scheinwerfer mit einer querliegenden Lichtquelle und zum Erzeugen von einer scharfen Lichtbegrenzung

Country Status (6)

Country Link
US (1) US6142658A (de)
EP (1) EP0933585B1 (de)
JP (1) JPH11265602A (de)
DE (1) DE69937917T2 (de)
ES (1) ES2300133T3 (de)
FR (1) FR2774150B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2849159A1 (fr) 2002-12-24 2004-06-25 Valeo Vision Projecteur a source lumineuse transversale pour vehicule automobile
EP1491816A1 (de) 2003-06-27 2004-12-29 Valeo Vision Kfz-Scheinwerfer mit einem Spiegel und einem optischen Umlenkelement
EP1538393A1 (de) * 2003-12-05 2005-06-08 Valeo Vision Fahrzeugscheinwerfer mit vertikaler Ausführung
FR2865021A1 (fr) * 2004-01-13 2005-07-15 Valeo Vision Projecteur verticalise pour vehicule automobile.
FR2877421A1 (fr) 2004-11-04 2006-05-05 Valeo Vision Sa Projecteur lumineux, pour vehicule automobile, donnant un faisceau a coupure
EP1686310A1 (de) 2005-02-01 2006-08-02 Valeo Vision Kfz-Scheinwerfer mit im wesentlichen vertikaler Ausdehnung

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2793000B1 (fr) * 1999-04-29 2001-08-03 Valeo Vision Projecteur bi-fonction a source unique et a optique fixe pour vehicule automobile
FR2804495B1 (fr) 2000-01-31 2002-06-07 Valeo Vision Projecteur de vehicule automobile, comportant une source transversale et apte a engendrer un faisceau a coupure non rectiligne
FR2808867B1 (fr) 2000-05-11 2002-08-23 Valeo Vision Projecteur bi-fonction a source lumineuse unique et occulteur mobile pour vehicule automobile
US6663570B2 (en) * 2002-02-27 2003-12-16 Volcano Therapeutics, Inc. Connector for interfacing intravascular sensors to a physiology monitor
FR2883359B1 (fr) * 2005-03-15 2007-05-11 Valeo Vision Sa Projecteur lumineux pour vehicule automobile, de faible encombrement
DE102006004058B4 (de) * 2006-01-28 2019-10-24 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung für ein Fahrzeug und Verfahren sowie Werkzeug zur Herstellung derselben
JP5771887B2 (ja) * 2011-01-25 2015-09-02 スタンレー電気株式会社 フォグランプ

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1444791A (fr) * 1964-05-19 1966-07-08 Fuller Myers Dispositif formant lampe électrique d'éclairage ou analogue avec accessoires et son procédé de fabrication ainsi que leurs diverses applications
FR2536503A1 (fr) 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur antibrouillard pour vehicule automobile
FR2536502A1 (fr) 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur de croisement pour vehicule automobile
FR2602305A1 (fr) 1986-08-04 1988-02-05 Cibie Projecteurs Projecteur antibrouillard a filament transversal pour vehicule automobile
FR2602306A1 (fr) 1986-08-04 1988-02-05 Cibie Projecteurs Projecteur croisement-route a deux filaments transversaux pour vehicule automobile
FR2609146A1 (fr) 1986-12-30 1988-07-01 Cibie Projecteurs Projecteur de vehicule automobile comportant un reflecteur parabolique a fond modifie
FR2609148A1 (fr) 1986-12-30 1988-07-01 Cibie Projecteurs Projecteur de vehicule automobile comportant un reflecteur a surface complexe a fond modifie
FR2639888A1 (fr) 1988-12-07 1990-06-08 Valeo Vision Projecteur de vehicule automobile, comportant un reflecteur a surface complexe a zones intermediaires modifiees
FR2664677A1 (fr) 1990-07-13 1992-01-17 Valeo Vision Reflecteur pour un dispositif d'eclairage de vehicule automobile, et projecteur et feu de signalisation incorporant un tel reflecteur.
WO1992008076A1 (en) * 1990-10-26 1992-05-14 Ljungstroem Kjell Reflector and method for directing the light in a reflector
FR2710393A1 (fr) 1993-09-24 1995-03-31 Valeo Vision Projecteur à glace lisse, notamment pour véhicule automobile, et procédé de fabrication du réflecteur d'un tel projecteur.
WO1997006454A2 (en) * 1995-08-04 1997-02-20 Pang Teng Ong Process for producing the profile of reflectors for a cylindrical source of light and reflector obtained according to this process

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527391A1 (de) * 1985-07-31 1987-02-05 Bosch Gmbh Robert Nebelscheinwerfer fuer kraftfahrzeuge
DE3531223A1 (de) * 1985-08-31 1987-03-05 Bosch Gmbh Robert Scheinwerfer, insbesondere rechteckscheinwerfer, fuer abblendlicht von kraftfahrzeugen
IT214875Z2 (it) * 1988-11-22 1990-07-04 Carello Spa Proiettore per autoveicoli

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1444791A (fr) * 1964-05-19 1966-07-08 Fuller Myers Dispositif formant lampe électrique d'éclairage ou analogue avec accessoires et son procédé de fabrication ainsi que leurs diverses applications
FR2536503A1 (fr) 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur antibrouillard pour vehicule automobile
FR2536502A1 (fr) 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur de croisement pour vehicule automobile
FR2602305A1 (fr) 1986-08-04 1988-02-05 Cibie Projecteurs Projecteur antibrouillard a filament transversal pour vehicule automobile
FR2602306A1 (fr) 1986-08-04 1988-02-05 Cibie Projecteurs Projecteur croisement-route a deux filaments transversaux pour vehicule automobile
FR2609146A1 (fr) 1986-12-30 1988-07-01 Cibie Projecteurs Projecteur de vehicule automobile comportant un reflecteur parabolique a fond modifie
FR2609148A1 (fr) 1986-12-30 1988-07-01 Cibie Projecteurs Projecteur de vehicule automobile comportant un reflecteur a surface complexe a fond modifie
FR2639888A1 (fr) 1988-12-07 1990-06-08 Valeo Vision Projecteur de vehicule automobile, comportant un reflecteur a surface complexe a zones intermediaires modifiees
FR2664677A1 (fr) 1990-07-13 1992-01-17 Valeo Vision Reflecteur pour un dispositif d'eclairage de vehicule automobile, et projecteur et feu de signalisation incorporant un tel reflecteur.
WO1992008076A1 (en) * 1990-10-26 1992-05-14 Ljungstroem Kjell Reflector and method for directing the light in a reflector
FR2710393A1 (fr) 1993-09-24 1995-03-31 Valeo Vision Projecteur à glace lisse, notamment pour véhicule automobile, et procédé de fabrication du réflecteur d'un tel projecteur.
WO1997006454A2 (en) * 1995-08-04 1997-02-20 Pang Teng Ong Process for producing the profile of reflectors for a cylindrical source of light and reflector obtained according to this process

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2849159A1 (fr) 2002-12-24 2004-06-25 Valeo Vision Projecteur a source lumineuse transversale pour vehicule automobile
EP1433999A1 (de) 2002-12-24 2004-06-30 Valeo Vision Kfz-Scheinwerfer mit einer querliegenden LIchtquelle
US7125150B2 (en) 2002-12-24 2006-10-24 Valeo Vision Projector with transverse light source for automotive vehicle
EP1491816A1 (de) 2003-06-27 2004-12-29 Valeo Vision Kfz-Scheinwerfer mit einem Spiegel und einem optischen Umlenkelement
EP2009347A1 (de) 2003-06-27 2008-12-31 Valeo Vision Kfz-Scheinwerfer mit einem Spiegel und einem optischen Umlenkelement
EP1538393A1 (de) * 2003-12-05 2005-06-08 Valeo Vision Fahrzeugscheinwerfer mit vertikaler Ausführung
FR2863342A1 (fr) * 2003-12-05 2005-06-10 Valeo Vision Projecteur verticalise pour vehicule automobile
FR2865021A1 (fr) * 2004-01-13 2005-07-15 Valeo Vision Projecteur verticalise pour vehicule automobile.
FR2877421A1 (fr) 2004-11-04 2006-05-05 Valeo Vision Sa Projecteur lumineux, pour vehicule automobile, donnant un faisceau a coupure
EP1655535A1 (de) 2004-11-04 2006-05-10 Valeo Vision Kfz.-Scheinwerfer, der eine Lichtbegrenzung erzeugt
US7364334B2 (en) 2004-11-04 2008-04-29 Valeo Vision Headlight for a motor vehicle giving a cutoff beam
EP1686310A1 (de) 2005-02-01 2006-08-02 Valeo Vision Kfz-Scheinwerfer mit im wesentlichen vertikaler Ausdehnung

Also Published As

Publication number Publication date
JPH11265602A (ja) 1999-09-28
FR2774150A1 (fr) 1999-07-30
EP0933585B1 (de) 2008-01-09
ES2300133T3 (es) 2008-06-01
FR2774150B1 (fr) 2000-04-14
DE69937917T2 (de) 2009-01-02
US6142658A (en) 2000-11-07
DE69937917D1 (de) 2008-02-21

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