EP1400748A1 - Kfz-Scheinwerfer mit einem Spiegel und dazu konjugiertem Umlenkelement zur Erzeugung eines Lichtbündels mit einer nicht horizontalen Hell-Dunkelgrenze - Google Patents

Kfz-Scheinwerfer mit einem Spiegel und dazu konjugiertem Umlenkelement zur Erzeugung eines Lichtbündels mit einer nicht horizontalen Hell-Dunkelgrenze Download PDF

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Publication number
EP1400748A1
EP1400748A1 EP03292245A EP03292245A EP1400748A1 EP 1400748 A1 EP1400748 A1 EP 1400748A1 EP 03292245 A EP03292245 A EP 03292245A EP 03292245 A EP03292245 A EP 03292245A EP 1400748 A1 EP1400748 A1 EP 1400748A1
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EP
European Patent Office
Prior art keywords
mirror
projector device
deflection element
vertical
central
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
EP03292245A
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English (en)
French (fr)
Other versions
EP1400748B1 (de
Inventor
Pierre Albou
Stéphanie Figuiere
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 EP1400748A1 publication Critical patent/EP1400748A1/de
Application granted granted Critical
Publication of EP1400748B1 publication Critical patent/EP1400748B1/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
    • 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

Definitions

  • the subject of the present invention is a vehicle headlamp device automobile essentially comprising a mirror and a deflection element conjugates whose design is such that it produces a light beam whose the cut is not flat.
  • the object of the invention is essentially to propose an improvement in an existing projector device, this improvement consisting of the introduction of modifications to the surfaces of the mirror and / or the deflection element so as to obtain a non-flat cut of the light beam produced.
  • the projector device originally designed as anti-fog, can thus be used in particular as a projector device of code type.
  • the projector device according to the invention essentially finds its application in use as low beam because it fully complies with the standards for this type of fire. He could nevertheless be used in any other cited projector device that would experience normative changes. Describing the invention in the context of traffic lights crossing is therefore in no way limiting to this single application.
  • the first family is that of so-called parabolic projectors.
  • a light beam is generated by a source small luminous light arranged in a reflector, or mirror.
  • Such a projector device can optionally be supplemented by an ice-type exit surface, which can be provided for example with streaks to modify the beam bright, for example by spreading it across.
  • This family of projectors includes so-called free-surface, or complex-surface, projectors, which directly obtain a light beam having a cutoff, or cutoff line, desired.
  • cut line we mean the boundary between a low area illuminated by the projector device and an area high which is not illuminated by the projector device. Precise realization complex surfaces, which have previously been the subject of calculations pushed, allows to obtain such a cut at the output of the projector device parabolic.
  • This type of projector is particularly efficient in terms of reduced depth and light distribution.
  • One of the difficulties encountered during their realization is that it is necessary that their mirror recovers a significant proportion of the light signals produced by the source of light, under pain of producing an insufficient light beam intense.
  • a compromise must then be found between two solutions.
  • the first one solution is to use a very small base focal length, so obtain a very closed mirror around the light source and little bulky in width; but because of the size - important in this case - images of the light source generated by the mirror, the beam bright is too thick, and therefore difficult to control.
  • the second solution is to increase the basic focal length but the mirror then has significant dimensions transverse to the optical axis, the projector device then no longer compact.
  • the second family is that of so-called elliptical projectors.
  • a spot of light concentration is generated by a light source arranged in a mirror.
  • the source light is arranged at the first focal point of an ellipsoid-shaped mirror of revolution, said spot forming at the second focus of the mirror.
  • the stain of light concentration is then projected onto the road by a lens convergent, for example a plano-convex type lens.
  • a lens convergent for example a plano-convex type lens.
  • we hide partially the spot of light concentration for example by means a metal cover placed within the projector device.
  • This type of projector is particularly efficient in terms of recovery of the light signals emitted by the light source; his dimensions transverse to the optical axis are otherwise relatively which is also an advantage.
  • this type of projector has a large footprint at depth, and the photometry is difficult to master, because no corrective element presenting streaks cannot correct the light beam coming from the lens.
  • hybrid headlamp basic In order to meet these demands, a recently proposed specific headlamp device, which will be designated as a hybrid headlamp basic.
  • the basic hybrid projector while technically belonging to the family of parabolic projectors - it does not have a cover for create a break - present, off, an external appearance closer to elliptical projectors than parabolic projectors are classics.
  • the basic hybrid projector device offered by elsewhere a good quality light beam.
  • the construction principle of the basic hybrid projector device is schematically represented, in an axial horizontal section, in the figure 1.
  • O is at the geometric center of a light source 10
  • Y-Y is the optical axis
  • X-X is the horizontal axis transverse to the optical axis of the projector
  • Z-Z is the vertical axis.
  • the projector device is essentially composed of a lamp housing the light source 10, a mirror 20 and a transparent element of optical deflection 30, here called lens, placed in front of the mirror 20.
  • the mirror 20 is able to cooperate with the light source 10 to generate a beam delimited by a cut line, and the deflection element 30 is suitable for ensuring horizontal spreading of light, without modifying substantially the vertical distribution of light.
  • the light beam produced by a projector device consists of a superimposition of all the images of the light source after reflection of the light signals it emits on the reflecting surface of the mirror 10 and after passing through the lens 30.
  • a generator 21 of which describes a curve y f 20 (x) which will be explained below.
  • the lens 30 is arranged transversely to the axis OY and has an internal face 31, or entry face, receiving the light reflected by the mirror and an external face 32, or exit face, smooth, flat and perpendicular to the OY axis.
  • the lens 30 is obtained by displacement of a vertical director along this curve to form its inner face, the lens thus being cylindrical.
  • the mirror 20, respectively the inner face 31 of the lens 30, is produced as a function of a desired behavior in terms of propagation of the reflected, respectively refracted rays.
  • D / 2 denotes the half-width of the mirror 20 and of the lens 30.
  • the horizontal generator of the mirror 20 is constructed so as to satisfy a given law, an example of which is given in Figure 2a, giving a dimension X (x), which is therefore a function of the abscissa x.
  • the lens which is shown in solid lines under its theoretical shape with a square outline, is made with an outline circular 33 shown in dotted lines in FIG. 6.
  • the device hybrid headlight switched off present, due to its smooth faces and due to its circular outline, a lens-like appearance and shape usually used in elliptical type projector devices.
  • the outline 23 of the mirror 20 is produced so as to eliminate from it any area likely to reflect light towards the outside of the circular outline 33 of the lens.
  • the hybrid headlamp device as just described constitutes therefore a compact projector in width and depth, capable to generate a satisfactory beam in terms of intensity due to the low loss of light signals inside the hybrid headlamp device, and presenting an aspect close to that of an elliptical.
  • lens 30 the role of lens 30 is to spread horizontally the light rays which arrive on its inner face after reflection on the mirror 20. Turning part of the mirror 20 would therefore not cause an offset on the cut-off line, but a diffuse task over a large part of the beam width due to the horizontal spread caused by the lens.
  • the invention proposes a projector device advanced hybrid, as opposed to basic hybrid projectors which have just been described, that is to say compact in width and in depth, capable of generating a satisfactory light beam, and having a aspect similar to that of an elliptical, this hybrid type projector perfected having undergone some modifications to obtain a line of non-flat cut of the light beam.
  • a vertical tilting of certain surface areas of the mirror and / or lens so that the inclination of these areas are modified, thus causing a shift towards the top of some of the images, constituting the light beam, of the light source.
  • the invention therefore essentially relates to a projector device comprising in particular a light source, a mirror having a reflective surface for reflecting light signals produced by the light source and a transparent optical deflection element, having an input face of the reflected light signals and an output face of the reflected light signals, the transparent deflection element being placed in front of the mirror, the mirror being able to cooperate with the light source to generate a beam delimited by a cut line, and the element of deflection being able to ensure a horizontal spreading of the signals light produced by the light source and reflected by the mirror, without modify the vertical distribution of light signals, said device headlamp being characterized in that it comprises at least one recess formed on at least one of the surfaces encountered by the signals light to obtain a non-flat cut-off line for the light beam.
  • Another object of the invention is a motor vehicle fitted with at least one projector device having at least one of the characteristics which have just been described.
  • a new mirror 80 an example of which possible implementation is shown in Figures 8a (front view of the mirror) at 8c according to different views.
  • recesses are introduced on this surface.
  • the reflecting surface of the mirror 80 is a juxtaposition of a set of adjacent vertical bands, a recess here designates a tilting of one of these vertical bands.
  • a strip vertical lateral left 81 which corresponds to the left end of the reflecting surface of the mirror
  • a vertical strip right lateral 82 which corresponds to the right end of the surface reflecting from the mirror
  • a central vertical strip 83 which corresponds to a strip adjacent to a vertical central axis 84 of the mirror.
  • the tilting of the lateral bands 81 and 82 makes it possible, in the light beam produced by the projector according to the invention, the ascent small images of the light source at the heart of the mirror, these images being of rather important intensity. We thus obtain a rupture of the type of rupture 70 of FIG. 7a.
  • Band tilting central 83 allows to get bigger images of the source bright, but less intense, allowing to obtain a cut-off type of the cut-off line 71.
  • the side strip central is located just to the left or just to the right of the central vertical axis 84 depending on the side where you want to see the cutoff line 71.
  • the inclination of the side bands 81 and 82 is around 3 degrees from the bands adjacent to them, the inclination of the central strip 83 being of the order of 1 degree with respect to the bands adjacent to it.
  • the tilting of the bands is preferably carried out in such a way only connecting surfaces between the tilted bands and their bands adjacent as little as possible exposed to the light rays produced by the light source, so as not to introduce too many parasites in the light beam produced.
  • the prisms arranged on the extreme lateral bands of the exit face of the lens are intended to raise small images light source to create the break 70, the prism arranged on a central strip being intended to ensure the extension of this rupture by picking up larger but less intense images of the light source.
  • Sections 101 can advantageously be parts of dishes (possibly different on the left and on the right) of hearths placed on the axis of the filament and inside the filament.
  • the homes of the parties left and right are preferably mixed in the center or offset symmetrically. In all cases, seen from behind, the right side has its focal point in front of the center of the filament (towards the lens), and the left part has its focus behind the center of the filament (towards the mirror).
  • the invention proposes, in addition to these modifications, to make a new lens 100, slightly modified compared to that used for basic hybrid projector devices.
  • recesses are introduced on this surface.
  • These here also consist of a replacement of a section particular 101 of the internal face of the lens 100, said particular section 101 corresponding to the lateral ends of a piece of internal face of the lens resulting from the intersection of this internal face and the defined space between a first central horizontal plane of the lens and a second plane, inclined relative to the foreground, by a surface creating a neutral diopter, for example a flat surface element, or possibly an opening.
EP03292245A 2002-09-20 2003-09-11 Kfz-Scheinwerfer mit einem Spiegel und dazu konjugiertem Umlenkelement zur Erzeugung eines Lichtbündels mit einer nicht horizontalen Hell-Dunkelgrenze Expired - Lifetime EP1400748B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0211704 2002-09-20
FR0211704A FR2844867B1 (fr) 2002-09-20 2002-09-20 Dispositif projecteur de vehicule automobile a miroir et element de deviation conjugues avec coupure non plate

Publications (2)

Publication Number Publication Date
EP1400748A1 true EP1400748A1 (de) 2004-03-24
EP1400748B1 EP1400748B1 (de) 2006-04-26

Family

ID=31897512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03292245A Expired - Lifetime EP1400748B1 (de) 2002-09-20 2003-09-11 Kfz-Scheinwerfer mit einem Spiegel und dazu konjugiertem Umlenkelement zur Erzeugung eines Lichtbündels mit einer nicht horizontalen Hell-Dunkelgrenze

Country Status (7)

Country Link
US (1) US7101062B2 (de)
EP (1) EP1400748B1 (de)
JP (1) JP2004119381A (de)
AT (1) ATE324555T1 (de)
DE (1) DE60304783T2 (de)
ES (1) ES2263931T3 (de)
FR (1) FR2844867B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2865021A1 (fr) * 2004-01-13 2005-07-15 Valeo Vision Projecteur verticalise pour vehicule automobile.

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20030611A1 (it) * 2003-08-05 2005-02-06 Fiat Ricerche Riflettore complesso formato da settori a simmetria
WO2008138156A1 (en) * 2007-05-14 2008-11-20 Heptagon Oy Illumination system
WO2010079397A1 (en) 2009-01-06 2010-07-15 Koninklijke Philips Electronics N.V. Led-based lamp
CN105042469B (zh) * 2013-01-30 2018-08-28 上海开腾信号设备有限公司 地面交通工具区域对应指向配光型led灯及其制造方法
JP6840606B2 (ja) * 2017-04-14 2021-03-10 スタンレー電気株式会社 レンズ体および車両用灯具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4200989A1 (de) 1991-01-25 1992-08-06 Koito Mfg Co Ltd Reflektor fuer einen fahrzeugscheinwerfer
EP1070912A2 (de) * 1999-07-23 2001-01-24 Ichikoh Industries Limited Scheinwerfer und Auslegungsverfahren für seinen Reflektor
EP1225386A2 (de) * 2001-01-22 2002-07-24 Ichikoh Industries, Ltd. Fahrzeugscheinwefer
EP1243846A1 (de) * 2001-03-21 2002-09-25 Valeo Vision Kraftfahrzeugprojektor mit Spiegel und konjugiertem Umlenkelement und Verfahren zur Herstellung desselben

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497687A (en) * 1967-08-30 1970-02-24 Donald W Hermann Lens attachment for automobile headlights
FR2460442A1 (fr) * 1979-06-29 1981-01-23 Cibie Projecteurs Nouvelle structure de projecteur, notamment de projecteur d'automobile
EP0221416B1 (de) * 1985-11-07 1995-09-27 Robert Bosch Gmbh Scheinwerfer für Abblendlicht oder Nebellicht von Kraftfahrzeugen
JPH01115001A (ja) * 1987-10-28 1989-05-08 Koito Mfg Co Ltd 車輌用前照灯
DE3808086A1 (de) * 1988-03-11 1989-09-28 Hella Kg Hueck & Co Reflektor fuer abgeblendete oder abblendbare kraftfahrzeugscheinwerfer
JPH0673241B2 (ja) * 1988-04-04 1994-09-14 株式会社小糸製作所 車輌用前照灯
JPH0658761B2 (ja) * 1988-11-08 1994-08-03 株式会社小糸製作所 前照灯用反射鏡
JP2626865B2 (ja) * 1992-12-25 1997-07-02 株式会社小糸製作所 車輌用前照灯の反射鏡
JP3145925B2 (ja) * 1996-07-18 2001-03-12 株式会社小糸製作所 車輌用前照灯
JP4002077B2 (ja) * 2001-04-26 2007-10-31 株式会社小糸製作所 自動車用前照灯

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4200989A1 (de) 1991-01-25 1992-08-06 Koito Mfg Co Ltd Reflektor fuer einen fahrzeugscheinwerfer
EP1070912A2 (de) * 1999-07-23 2001-01-24 Ichikoh Industries Limited Scheinwerfer und Auslegungsverfahren für seinen Reflektor
EP1225386A2 (de) * 2001-01-22 2002-07-24 Ichikoh Industries, Ltd. Fahrzeugscheinwefer
EP1243846A1 (de) * 2001-03-21 2002-09-25 Valeo Vision Kraftfahrzeugprojektor mit Spiegel und konjugiertem Umlenkelement und Verfahren zur Herstellung desselben

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2865021A1 (fr) * 2004-01-13 2005-07-15 Valeo Vision Projecteur verticalise pour vehicule automobile.

Also Published As

Publication number Publication date
ES2263931T3 (es) 2006-12-16
FR2844867A1 (fr) 2004-03-26
EP1400748B1 (de) 2006-04-26
US7101062B2 (en) 2006-09-05
ATE324555T1 (de) 2006-05-15
FR2844867B1 (fr) 2005-07-08
US20040057245A1 (en) 2004-03-25
DE60304783D1 (de) 2006-06-01
JP2004119381A (ja) 2004-04-15
DE60304783T2 (de) 2007-05-03

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