EP0208574B1 - Projecteur de croisement pour véhicule automobile - Google Patents

Projecteur de croisement pour véhicule automobile Download PDF

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Publication number
EP0208574B1
EP0208574B1 EP86401216A EP86401216A EP0208574B1 EP 0208574 B1 EP0208574 B1 EP 0208574B1 EP 86401216 A EP86401216 A EP 86401216A EP 86401216 A EP86401216 A EP 86401216A EP 0208574 B1 EP0208574 B1 EP 0208574B1
Authority
EP
European Patent Office
Prior art keywords
filament
reflector
headlamp according
images
horizontal
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
Application number
EP86401216A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0208574A1 (fr
Inventor
Patrice Collot
Norbert Brun
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
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 EP0208574A1 publication Critical patent/EP0208574A1/fr
Application granted granted Critical
Publication of EP0208574B1 publication Critical patent/EP0208574B1/fr
Expired 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
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • F21S41/332—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas 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
    • 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
    • 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
    • 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
    • F21S41/166—Incandescent light sources, e.g. filament or halogen lamps characterised by the shape of the filament
    • 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
    • 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
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21S41/323—Optical layout thereof the reflector having two perpendicular cross sections having regular geometrical curves of a distinct nature
    • 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
    • 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

Definitions

  • the present invention relates to a dipped headlight for a motor vehicle, in which the light beam is cut above two horizontal half-planes offset in height.
  • the contour of the cut is defined by two horizontal half-lines, the half-line on the right side being at the level of the horizontal and the half-line on the left side being offset by approximately 1.5% below of the horizontal.
  • the beams meeting these standards are most often designed with a projector provided with a transverse filament lamp cooperating with a parabolic reflector of relatively large focal length, so as to reduce the thickness of the beam and consequently minimize the extra thicknesses due to prisms deflectors on the closing glass.
  • FR-A-2 087 317 describes a projector of this type, in accordance with the preamble of claim 1.
  • One of the aims of the invention is to propose a dipped headlight overcoming the aforementioned drawbacks and allowing maximum recovery of the light flux emitted by the filament of the lamp.
  • the proposed low-beam headlamp conventionally comprises a lamp, a reflector and a closing glass placed in front of the reflector, as well as means for cutting the light beam above two horizontal half-planes offset in height.
  • the headlight has the combination of the characteristics set out in the characterizing part of claim 1.
  • the projector according to the invention shown schematically in Figure 1, comprises a reflector 10, an axial filament lamp 20, and a distribution glass 30 closing the projector.
  • the surface of the reflector is a surface without discontinuity, chosen so as to form images of the filament, all the points of which are advantageously situated below a horizontal plane, all of these images having their highest point aligned on this horizontal plane.
  • absence of discontinuity is meant a second order continuity guaranteed at any point on the surface, that is to say that the radius of curvature and the position of the center of curvature always vary continuously; this arrangement makes it possible, in practice, to produce real surfaces having a very good conformity with the theoretical surfaces, thus avoiding the defects which were specific to the system with "offset paraboloids" described above, the second order continuity makes in particular the reflector perfectly stampable in principle.
  • Ox being the axis of the reflector and the plane xOy being a substantially horizontal plane, that is to say horizontal for a reflector whose axis would be horizontal.
  • the distance separating, in the radial direction, the surface of the reflector from the surface defined by the equation does not exceed 0.15 mm.
  • the normal difference separating, in the vertical plane passing through the origin of the coordinates, the trace of the surface of the reflector of the corresponding least-square parabola does not exceed 0.3 mm (the concept of "parabola least squares "is explained in the two aforementioned documents).
  • the distance from the emissive surface to the axis does not exceed 25% of the diameter of the filament, in one direction or the other.
  • the axial centering of the filament relative to the point of coordinates (f ,, 0, O) is carried out with a tolerance of 10% of the length of the filament, in one direction or the other.
  • Figures 4 to 11 and Figure 12 show the illumination provided by regions 12 to 16 and 11, respectively, of the bare reflector thus defined, with a horizontal axis Ox.
  • the regions 12 'to 19' produce an illumination symmetrical with respect to the vertical vv 'of the illuminations produced by the regions 12 to 19, respectively.
  • the outermost curve corresponds to an illumination of 100 candelas
  • the next curve to an illumination of 1000 candelas
  • the other curves to increasing illuminations of 2000, 4000, ... candelas.
  • the filament-reflector assembly is tilted down and to the right towards the concentration point. maximum as defined by standard SAE J 579 c, as indicated above.
  • these correcting means consist of prisms formed on the homologous regions 30b and 30c of the closing glass (FIG. 3), which are provided with prisms of 1 to 3 °.
  • the central region 30a of the closing glass can be striated in a conventional manner, to obtain the desired comfort and widening for the light beam.
  • the surface 10a of the reflector is extended by two lateral surfaces 10b and 10c of the same equation, but slightly angularly offset (as can be seen in FIG. 15), also by an angle on the order of 1 to 3 °.
  • the reflector of the preceding embodiment is modified (FIG. 2) while retaining the same surface equation, except that the part comprising the regions 16 to 19 is tilted very slightly upwards. on the one hand, and that comprising the regions 16 'to 19' on the other.
  • the regions 30b and 30c of the closing glass can be devoid of prisms, or only very slightly prismatic, which makes it possible to eliminate the dazzling factors due to the multiplicity of horizontal drafts resulting from the presence prisms in the above case.
  • the projector according to the invention is capable of collecting a luminous flux much greater than that given by a paraboloid of an axial filament projector of conventional design, projector whose focal length can hardly be reduced to values less than 29 mm.
  • a low focal length f o for example of 22.5 mm, which makes it possible for example to produce a projector of generally rectangular, symmetrical shape, of 70 mm high and 150 mm wide.
  • the gain in flux is then close to 30% compared to conventional projectors, the most common focal length of which is 31.75 mm and the height always limited to minimum values of the order of 100 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP86401216A 1985-06-07 1986-06-05 Projecteur de croisement pour véhicule automobile Expired EP0208574B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8508655A FR2583139B1 (fr) 1985-06-07 1985-06-07 Projecteur de croisement pour vehicule automobile
FR8508655 1985-06-07

Publications (2)

Publication Number Publication Date
EP0208574A1 EP0208574A1 (fr) 1987-01-14
EP0208574B1 true EP0208574B1 (fr) 1989-08-02

Family

ID=9320001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401216A Expired EP0208574B1 (fr) 1985-06-07 1986-06-05 Projecteur de croisement pour véhicule automobile

Country Status (8)

Country Link
US (1) US4797797A (ja)
EP (1) EP0208574B1 (ja)
JP (1) JPS61285601A (ja)
AU (1) AU579015B2 (ja)
BR (1) BR8602630A (ja)
CA (1) CA1278784C (ja)
DE (1) DE3664807D1 (ja)
FR (1) FR2583139B1 (ja)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609148B1 (fr) * 1986-12-30 1991-07-12 Cibie Projecteurs Projecteur de vehicule automobile comportant un reflecteur a surface complexe a fond modifie
FR2609146B1 (fr) * 1986-12-30 1990-01-05 Cibie Projecteurs Projecteur de vehicule automobile comportant un reflecteur parabolique a fond modifie
JP2622564B2 (ja) * 1986-12-30 1997-06-18 ヴァレオ ヴイジョン カットオフによって限定されたビームを放射する、変形底部を有する自動車用前照灯
FR2657680B1 (fr) * 1990-01-26 1993-02-05 Valeo Vision Projecteur de vehicule automobile comportant une source lumineuse perfectionnee.
US5481443A (en) * 1993-05-19 1996-01-02 The Genlyte Group, Inc. In-ground directional light fixture
FR2732747B1 (fr) * 1995-04-06 1997-06-20 Valeo Vision Projecteur de vehicule automobile capable d'emettre un faisceau delimite par une coupure a deux demi-plans decales en hauteur
DE19843986B4 (de) * 1998-09-25 2012-02-23 Automotive Lighting Reutlingen Gmbh Scheinwerfer für Fahrzeuge
US20080186717A1 (en) * 2007-02-01 2008-08-07 Genlyte Thomas Group Llc Compact In-Grade Luminaire
US7524078B1 (en) * 2008-01-18 2009-04-28 Genlyte Thomas Group Llc In-grade lighting fixture
US7905621B1 (en) 2008-01-18 2011-03-15 Genlyte Thomas Group, Llc In-grade lighting fixture

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1566590A (en) * 1925-12-22 godley
US1686543A (en) * 1927-02-02 1928-10-09 William H Wood Vehicle headlight
FR2087317A5 (ja) * 1970-05-14 1971-12-31 Cibie Projecteurs
FR2396240A1 (fr) * 1977-07-01 1979-01-26 Cibie Projecteurs Projecteur croisement-route de grande ouverture pour vehicule automobile
JPS5459781U (ja) * 1977-10-04 1979-04-25
US4481563A (en) * 1982-05-10 1984-11-06 Corning Glass Works Automotive headlight having optics in the reflector
FR2536502B1 (fr) * 1982-11-19 1987-01-09 Cibie Projecteurs Projecteur de croisement pour vehicule automobile
FR2536503B1 (fr) * 1982-11-19 1987-12-31 Cibie Projecteurs Projecteur antibrouillard pour vehicule automobile

Also Published As

Publication number Publication date
JPS61285601A (ja) 1986-12-16
EP0208574A1 (fr) 1987-01-14
US4797797A (en) 1989-01-10
DE3664807D1 (en) 1989-09-07
AU579015B2 (en) 1988-11-10
FR2583139B1 (fr) 1989-02-03
BR8602630A (pt) 1987-02-03
AU5804186A (en) 1986-12-11
CA1278784C (en) 1991-01-08
JPH039561B2 (ja) 1991-02-08
FR2583139A1 (fr) 1986-12-12

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