EP1260758A1 - Kfz-Scheinwerfer - Google Patents

Kfz-Scheinwerfer Download PDF

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Publication number
EP1260758A1
EP1260758A1 EP02291244A EP02291244A EP1260758A1 EP 1260758 A1 EP1260758 A1 EP 1260758A1 EP 02291244 A EP02291244 A EP 02291244A EP 02291244 A EP02291244 A EP 02291244A EP 1260758 A1 EP1260758 A1 EP 1260758A1
Authority
EP
European Patent Office
Prior art keywords
light
lighting
lens
mirror
projector
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.)
Withdrawn
Application number
EP02291244A
Other languages
English (en)
French (fr)
Inventor
P. Albou
A. L'hermine
N. Jousset
R. Nouet
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 EP1260758A1 publication Critical patent/EP1260758A1/de
Withdrawn legal-status Critical Current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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • 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
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/635—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by moving refractors, filters or transparent cover plates

Definitions

  • the invention provides a vehicle lighting projector automobile.
  • the invention more particularly provides a projector motor vehicle lighting of the type which includes a light source mounted in a mirror to provide a flux of light passing through an optical lens and forming a beam lighting of an area of the road according to a first distribution of light intensity.
  • the mirror has a concave reflective surface of which the shape is generally elliptical, it can also have other geometric shapes to allow the orientation of the light flow towards the lens.
  • the mirror has a focus which is separate from the top of the concave surface of a distance called focal length.
  • the light flux emitted by the source from the focus is a stream of light whose rays converge at a point.
  • part of the light source is located on the hearth.
  • the emission of the entire light flux does not can be concentrated in the home.
  • the light source, in particular the filament or the electric arc, which provides the flux is not punctual. Therefore, the light flux reflected by the mirror has rays which do not pass through the hearth.
  • the light flow then passes through the converging lens which allows to form a light beam.
  • the mirror and the lens are arranged one relative to each other so that the point of convergence of rays of the light flow correspond to the optical focus of the lens.
  • the reflected rays exit the lens in a horizontal longitudinal direction which is perpendicular to the plane vertical transverse in which the lens extends.
  • the top and the focus of the mirror are axially aligned with the optical focus of the lens.
  • the beam characteristics lighting its intensity is measured in a transverse plane located at a predetermined distance from the exit face of the lens.
  • the light intensity of the beam lighting decreases from an area center on which iso-intensity circles are centered, this is to say circles on which the luminous intensity of the flux is constant.
  • the light beam must illuminate the road near the vehicle without dazzling drivers of oncoming traffic.
  • a concealer also called diaphragm between the light source and the lens.
  • the concealer thus makes it possible to cut off the flow of light to hide the upper part of the beam lighting, the central zone of maximum intensity being located near the beam cutoff line.
  • the beam For the high beam function, the beam must illuminate the route at a distance greater than that of the low beam. Road lighting in the immediate vicinity of the vehicle can causing discomfort to the driver of the vehicle thus increases the risk of accident.
  • Both low beam and high beam functions can be realized by two projectors each ensuring a separate function.
  • the high beam function use the low beam, including the direction of the light beam and the distribution of its light intensity are modified in particular by retracting the blackout, to which is added a lighting projector complementary called code complement. So the source luminous allowing to realize the additional lighting is less powerful than if it were to fully realize the route function.
  • the light flux emitted by the projector for lighting satisfactory of the road is greater than the flux useful for the lighting of the road.
  • the performance of a projector which can be defined as the ratio between the light intensity emitted by the projector and the flux provided by the light source, evolves according to dimensions of the mirror. Indeed, the more the reflective surface of the mirror is large the higher the yield.
  • the invention provides a motor vehicle lighting projector of the type which comprises a light source mounted in a mirror to provide a light flux which passes through an optical lens and which forms a beam of light. lighting of an area of the road according to a first distribution of the light intensity, characterized in that it comprises a reflective member which is arranged between the mirror and the lens and which is capable of deflecting part of the light flux so as to concentrate the light intensity of the deviated part of the flux towards a predetermined portion of the lit area.
  • Figure 1 shows a section through a plane longitudinal and vertical of a motor vehicle headlight 10 which mainly comprises a mounted light source 12 in a rear mirror 14 as well as a converging lens 16 before.
  • the lens 16 is represented schematically by a double arrow in the figures.
  • the light source 12 can consist either in particular in a filament lamp, in accordance with the figures, or as a discharge lamp.
  • the mirror 14 is here of elliptical shape. Its internal surface concave 18 has a reflective coating.
  • the foyer 20 of mirror 14 corresponds substantially to the center of the filament of the light source 12.
  • the rays 22 of the light flux which come from the center of the filament of light source 12 and which are reflected on the internal surface 18 of mirror 14, converging at a point of convergence 24.
  • the converging lens 16 which can form the ice of front protection of the projector 10 comprises a hearth 26.
  • Another ray 32 of the light flux has also been shown. which comes from the rear end of the light source 12.
  • the ray 32 is reflected on the reflecting surface 18 of the mirror 14 and passes through the lens 16. Since the ray 32 does not pass not through the focal point 26 of the lens 16, the radius 32 is deflected by the lens 16 in a direction diverging from the portion central 30 of the lighting beam 28, thus forming a portion device 33.
  • the impact of the lighting beam 28 of such a projector on a transverse measurement surface which is located at a distance predetermined projector 10 is shown schematically in Figure 2.
  • the density of the dotted lines is representative of the light intensity of the beam 28.
  • the impact of the light beam 28 on the surface transverse measurement has a circular central area 34 of maximum intensity which corresponds to the impact of the portion central 30 of the beam 28 and a peripheral zone 36 which corresponds to the impact of the peripheral portion 33 in which the light intensity decreases from the central zone 34.
  • the circles 38 shown in dotted lines, which are concentric with the circular central zone 34 correspond to iso-intensity lines.
  • the longitudinal axis L of the headlight 10 When used in a motor vehicle, the longitudinal axis L of the headlight 10 is slightly inclined towards the low with respect to the horizontal plane, so that the beam 28 illuminates an area of the road according to a first distribution of light intensity.
  • the first distribution of the light intensity of the area lit from the road corresponds to the projection of the distribution of the light intensity of the impact of the lighting beam 28 on the transverse measurement surface in the inclined direction of the headlamp 10.
  • the illuminated area of the road has a central zone and a peripheral zone which are elongated according to a longitudinal direction which corresponds to the direction of vehicle lighting.
  • the entire beam 28 is not useful. Indeed, for example when the headlamp 10 is a main beam, the lower part of the beam 28 lighting is not necessary, it may even interfere with the driver visibility.
  • the invention proposes that the projector 10 includes a reflector 50 which is arranged between the mirror 14 and the lens 16 and which is liable to deviate part of the light flow so as to concentrate the intensity light from the deviated part of the flow towards a portion predetermined area illuminated.
  • the lower part of the light flow from a spotlight according to the state of the art, which could cause driver discomfort, allows depending the invention to increase the light intensity of a portion predetermined illuminated area which is useful and allows increase the visibility of the road, and therefore the comfort of the driver.
  • the predetermined part 48 corresponds to the part that requires the highest light intensity.
  • the reflecting member 50 can have a reflecting surface 52.
  • the member reflector 50 can be a mirror.
  • the reflecting member 50 is a prism 54 of transparent material which is inclined at a predetermined angle relative to the part of the flow to be diverted so that it is reflected on one of its walls.
  • FIG. 5 Such a solution is shown in FIG. 5 in which the ray 32 penetrates inside the prism 54 at an angle of incidence i 1 relative to the straight line 56 perpendicular to the entry face 58. The ray 32 is then deflected by a refractive angle r 1 from normal 56.
  • the limit angle is determined as a function of the refractive index n as well as the wavelength of the radius 32.
  • the prism 52 is positioned so at least part of the rays entering it are reflected on its underside 62 so as to be deflected to concentrate their light intensity towards a predetermined portion of the lighted area of the road.
  • the reflecting member is a mirror 50 or a prism 52, it can be mounted movable relative to the light source 12 of so as to adapt the deviated part of the flow and / or the position of the predetermined portion of said illuminated area.
  • the lighting projector 10 makes it possible to carry out a code function and a route function.
  • the reflector 50 is pivotally mounted around an axis of rotation A.
  • the reflector member 50 constitutes a shutter. Thus, part of the rays, in particular the ray 66, is stopped by the reflecting member 50, thus masking a part of the lit area.
  • the reflecting member 50 presents a transverse profile composed of a horizontal segment and of an inclined segment so as to form a beam cut lighting along the cut-off line 64 shown in FIG. 7.
  • the unit reflector 50 has pivoted so that its reflecting surface deflects part of the light flow, in particular the radius 66 of so as to focus its light intensity on a part predetermined area illuminated.
  • the impact of the beam 28 lighting on the transverse measurement surface is similar to that shown in Figure 4.
  • the radius 66 can pass through the focus 26 of lens 16, which allows its intensity to be concentrated light in the central area 34 of the beam impact 28 on the transverse measurement surface requiring maximum light intensity.
  • Such a projector 10 is advantageously mobile by relation to the structure of the vehicle so as to orient the beam differently depending on its code function or its route function. Indeed, depending on the route, it is advantageous to note slightly the projector compared to its position in operation coded.
EP02291244A 2001-05-25 2002-05-17 Kfz-Scheinwerfer Withdrawn EP1260758A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0107009 2001-05-25
FR0107009A FR2825138B1 (fr) 2001-05-25 2001-05-25 Projecteur d'eclairage de vehicule automobile

Publications (1)

Publication Number Publication Date
EP1260758A1 true EP1260758A1 (de) 2002-11-27

Family

ID=8863736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02291244A Withdrawn EP1260758A1 (de) 2001-05-25 2002-05-17 Kfz-Scheinwerfer

Country Status (2)

Country Link
EP (1) EP1260758A1 (de)
FR (1) FR2825138B1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005023817A1 (de) * 2005-05-24 2006-11-30 Bayerische Motoren Werke Ag Fahrzeugscheinwerfer
EP1944542A1 (de) * 2007-01-12 2008-07-16 Valeo Vision Scheinwerfer mit zwei Funktionen für Kraftfahrzeug
FR2917485A1 (fr) * 2007-06-18 2008-12-19 Valeo Vision Sa Module optique pour dispositif d'eclairage automobile
US7524094B2 (en) 2005-09-13 2009-04-28 Koito Manufacturing Co., Ltd. Lamp unit for a vehicle headlamp
JP2009266758A (ja) * 2008-04-30 2009-11-12 Valeo Vision 自動車用の２機能ヘッドライト
FR2962785A1 (fr) * 2010-07-19 2012-01-20 Valeo Vision Plieuse sur lame transparente avec depouille
EP3276253A1 (de) * 2016-07-29 2018-01-31 Valeo Vision Beleuchtungsmodul eines kraftfahrzeugscheinwerfers mit variablem öffnungsstrahl

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004106692A1 (en) * 2003-05-30 2004-12-09 John Alexander Deschamps Barrier for sealing an opening

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0591566A1 (de) * 1992-09-22 1994-04-13 AUTOPAL, s.r.o. Kraftfahrzeugscheinwerfer
EP0624753A2 (de) * 1993-05-08 1994-11-17 Robert Bosch Gmbh Scheinwerfer für Fahrzeuge
DE19526023A1 (de) * 1995-07-17 1997-01-23 Daimler Benz Ag Scheinwerfer
FR2761026A1 (fr) * 1997-03-18 1998-09-25 Valeo Vision Projecteur bi-faisceau a source et reflecteur uniques pour vehicule automobile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0591566A1 (de) * 1992-09-22 1994-04-13 AUTOPAL, s.r.o. Kraftfahrzeugscheinwerfer
EP0624753A2 (de) * 1993-05-08 1994-11-17 Robert Bosch Gmbh Scheinwerfer für Fahrzeuge
DE19526023A1 (de) * 1995-07-17 1997-01-23 Daimler Benz Ag Scheinwerfer
FR2761026A1 (fr) * 1997-03-18 1998-09-25 Valeo Vision Projecteur bi-faisceau a source et reflecteur uniques pour vehicule automobile

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005023817A1 (de) * 2005-05-24 2006-11-30 Bayerische Motoren Werke Ag Fahrzeugscheinwerfer
US7524094B2 (en) 2005-09-13 2009-04-28 Koito Manufacturing Co., Ltd. Lamp unit for a vehicle headlamp
DE102006042749B4 (de) * 2005-09-13 2010-07-22 Koito Mfg. Co., Ltd. Leuchteinheit eines Fahrzeugscheinwerfers
EP1944542A1 (de) * 2007-01-12 2008-07-16 Valeo Vision Scheinwerfer mit zwei Funktionen für Kraftfahrzeug
US7784985B2 (en) 2007-01-12 2010-08-31 Valeo Vision Dual function headlamp for a motor vehicle
FR2917485A1 (fr) * 2007-06-18 2008-12-19 Valeo Vision Sa Module optique pour dispositif d'eclairage automobile
EP2006605A1 (de) * 2007-06-18 2008-12-24 Valeo Vision Fahrzeugsscheinwerfer
JP2009266758A (ja) * 2008-04-30 2009-11-12 Valeo Vision 自動車用の２機能ヘッドライト
FR2962785A1 (fr) * 2010-07-19 2012-01-20 Valeo Vision Plieuse sur lame transparente avec depouille
EP2410238A1 (de) * 2010-07-19 2012-01-25 Valeo Vision Optischer Reflektor auf transparenter Scheibe mit Hinterschnitt
EP3276253A1 (de) * 2016-07-29 2018-01-31 Valeo Vision Beleuchtungsmodul eines kraftfahrzeugscheinwerfers mit variablem öffnungsstrahl

Also Published As

Publication number Publication date
FR2825138B1 (fr) 2004-01-09
FR2825138A1 (fr) 2002-11-29

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