EP0247936A1 - Abblendlichtscheinwerfer ohne Abblendkappe und mit versetzter Konzentration - Google Patents

Abblendlichtscheinwerfer ohne Abblendkappe und mit versetzter Konzentration Download PDF

Info

Publication number
EP0247936A1
EP0247936A1 EP87401170A EP87401170A EP0247936A1 EP 0247936 A1 EP0247936 A1 EP 0247936A1 EP 87401170 A EP87401170 A EP 87401170A EP 87401170 A EP87401170 A EP 87401170A EP 0247936 A1 EP0247936 A1 EP 0247936A1
Authority
EP
European Patent Office
Prior art keywords
filament
quadrants
reflector
axis
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.)
Granted
Application number
EP87401170A
Other languages
English (en)
French (fr)
Other versions
EP0247936B1 (de
Inventor
Patrice Collot
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
Cibie Projecteurs SA
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 Cibie Projecteurs SA, Valeo Vision SAS filed Critical Cibie Projecteurs SA
Publication of EP0247936A1 publication Critical patent/EP0247936A1/de
Application granted granted Critical
Publication of EP0247936B1 publication Critical patent/EP0247936B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • the present invention relates to a dipped headlight for a motor vehicle, in which the light beam is located below a cut-off limit defined by two horizontal half-planes slightly offset in height relative to each other.
  • the cutoff is defined approximately, on a standardized screen, by two horizontal half-straight lines situated on either side of the axis of the projector, the half-line on the right side being at the level of the horizon and the half-line on the left side being offset by about 1.5% below the horizontal.
  • the region of maximum illumination imposed is shifted to the right relative to the axis of the projector.
  • the beams meeting these standards are most often obtained using a projector comprising a transverse filament lamp cooperating with a reflector or parabolic mirror of relatively high focal distance, so as to reduce the thickness of the beam and consequently minimize the excess thickness created by the deflecting prisms on the closing glazing.
  • a headlamp comprising a reflector of complex shape capable of forming images of the filament below a cut of general horizontal orientation, allowing the use of reduced focal distances, and consequently a much greater flux recovery.
  • a projector comprises an axial filament lamp emitting freely all around it, a reflector having an axis extending below the axis of the filament parallel to it and comprising a surface without discontinuity, and a closing glass placed in front of the reflector and capable of distributing said beam in the horizontal direction.
  • Such a projector is shown diagrammatically, in horizontal section, in FIG. 1. It comprises a unitary reflector 10 comprising a first mirror 10a for the crossing function, the axis 12a of which is offset to the right (downwards in the figure) at an angle 6, and a second mirror 10b, integral with the first, whose axis 12b is located in the axis of the road.
  • the inclination which must be given to the reflector of the dipped beam is a function of the focal distance used and the optical characteristics of the closing lens. More precisely, the reflector must be inclined laterally by an angle corresponding to the angular half-width of the images participating in the concentration; however, the width of these images depends on the size of the areas of the closing glass dedicated to concentration, as well as on the focal distance of the reflector, these parameters being a function of the dimensions allocated to the dipped headlight in the vehicle, and more generally of the specifications.
  • the invention aims in particular to eliminate this demolding problem by proposing a dipped headlight which requires no tilting of its axis to the right in order to obtain the offset concentration spot.
  • the filament, and therefore the lamp therefore retain an orientation parallel to the axis of the track, and a twin-mirror projector incorporating such a crossing projector can be produced easily and at moderate cost, with a release of the two mirrors according to the same axis.
  • the dipped headlight according to the present invention is characterized in that the reflector comprises two first diametrically opposite quadrants, the surfaces of which approach at least approximately two portions of paraboloids, the foci of which are each located in the vicinity of a respective axial end of the filament, for generating images of the filament creating a light concentration situated below the cut and offset laterally with respect to the axis of the projector, the other two quadrants being constituted by surfaces ensuring the gradual transition and continues between the first two quadrants by creating images of the filament located mainly below the cut.
  • the projector according to the invention shown diagrammatically in FIGS. 2 to 4, comprises a lamp with an axial cylindrical filament 100 of length l and of radius r, a reflector or mirror 200 and a distribution glass 300 closing the projector.
  • the axis of the filament 100 is not coincident with the axis Ox of the reflector, but is shifted upwards by a distance equal to its radius r. In this way, the lowest part of the emissive surface of the filament is tangent to said axis Ox.
  • the surface of the reflector is a surface without discontinuity, determined so that it forms images of the filament which are for the most part located below a horizontal plane and, as will be seen below, whose most point top is located on this horizontal plane or entirely in its vicinity. It is also determined so that the concentration spot obtained is shifted to the right (or to the left depending on the direction of traffic) relative to the axis of the road.
  • absence of discontinuity is meant a second order continuity, that is to say that at any point on any line drawn on the surface, the tangent planes are the same on both sides of this line. The surface therefore shows no breakage.
  • This arrangement makes it possible, in practice, to produce real surfaces having very good conformity with the theoretical surfaces, in particular avoiding the defects specific to certain mirrors of the prior art having offset paraboloids. In particular, such continuity makes the reflector perfectly stampable.
  • the reflector is divided into four zones or sectors 201 to 204, defined mathematically below, the above-mentioned continuity being ensured in particular at the interface between these sectors.
  • the four sectors separated from each other by the horizontal plane xOy and by the vertical plane xOz, each define a quadrant.
  • quadrant will be used to denote any sector delimited by two planes, substantially horizontal and substantially vertical respectively.
  • the surfaces of quadrants 201 and 202 are designed to generate images of the filament which create a spot of concentration shifted downward and to the right with respect to the axis Ox.
  • the surfaces of the quadrants 203 and 204 are determined to ensure with the above-mentioned continuity the transition between the quadrants 201 and 202, and, on a functional level, to generate images of the filament all located in the vicinity of the axis of the projector, but mostly below the horizontal plane passing through its axis. In particular, the centers of all these images are located below this plane.
  • ⁇ f is equal to the difference f 2 - f 1 and is approximately equal to the length ⁇ of the filament.
  • FIGS 5 to 8 are shown, by isocandela curves on screen C 1 to C 4 , the illuminations provided by the quadrants 201 to 204 of the reflector 200 of Figures 2 to 4 in the absence of closing glass.
  • quadrant 201 produces a spot of concentration which is shifted downwards and to the right with respect to the reference center H of the screen (intersection of said screen with the axis Ox of the projector), in the same way as quadrant 202.
  • This shifted concentration spot initiates, as we can observe, the right half-cut of the passing beam.
  • the total light distribution, obtained by superimposing the illuminations represented in FIGS. 5 to 8, is represented in FIG. 9 by isocandela curves C T on a projection screen.
  • FIG. 10 represents, in front view, a possible embodiment of a closing glass particularly well suited to the mirror 200 described above. It comprises thirteen zones 301 to 313 arranged as shown. The zones 301 and 313 are each, respectively, the homolog of a large part of the surface of the quadrants 203 and 204 of the mirror. These zones are non-deflecting, or very little deflecting, so as not to alter the formation of the right cut of the beam.
  • the central zones 306, 307 and 308 will be able to effect a strong horizontal deflection, in particular to give the beam the large width required.
  • the remaining areas of the glass 300 will be moderately deviating horizontally, in particular in order to increase the illumination on the left by initiating the corresponding half-cut and to further extend the right cut as initiated by the part of the beam crossing the areas 301 and 313.
  • the axis of the filament, and therefore of the lamp of this low beam projector is strictly parallel to the axis of the road. It is easy in this way to associate the low beam headlamp with a headlamp in the form of a single block comprising a bi-mirror reflector.
  • the axis of the lamp of a road projector being preferably parallel to the axis of the road, the flanges of the two mirrors will therefore be strictly parallel, which allows the realization of the bi-mirror reflector by an operation particularly simple molding, without difficulty in demolding.
  • such a vertical offset will be of the order of 0.5 mm for a parabolic mirror having a focal distance of 22.5 mm.
  • f 14 and fI3 are focal distances corresponding to two distinct focal points located in the vicinity of the end of the filament closest to the origin of the coordinates
  • f 23 and f 24 are focal distances corresponding to two distinct focal points located in the vicinity of the end of the filament furthest from the origin of the coordinates.
  • Each of the surfaces defined above ensures the continuous transition between the neighboring surfaces, continuity being also ensured at the interface between these surfaces two by two.
  • the general concepts of the invention can be implemented in reflectors of low height, thanks to the particularly high light output which is obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP87401170A 1986-05-26 1987-05-25 Abblendlichtscheinwerfer ohne Abblendkappe und mit versetzter Konzentration Expired - Lifetime EP0247936B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8607461 1986-05-26
FR8607461A FR2599120B1 (fr) 1986-05-26 1986-05-26 Projecteurs de croisement sans coupelle a concentration decalee

Publications (2)

Publication Number Publication Date
EP0247936A1 true EP0247936A1 (de) 1987-12-02
EP0247936B1 EP0247936B1 (de) 1990-06-27

Family

ID=9335598

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87401170A Expired - Lifetime EP0247936B1 (de) 1986-05-26 1987-05-25 Abblendlichtscheinwerfer ohne Abblendkappe und mit versetzter Konzentration

Country Status (5)

Country Link
US (1) US4754374A (de)
EP (1) EP0247936B1 (de)
JP (1) JPH0793042B2 (de)
DE (1) DE3763453D1 (de)
FR (1) FR2599120B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2294536A (en) * 1994-10-27 1996-05-01 Carello Lighting Plc Vehicle headlight with a complex-surface reflector
FR2982929A1 (fr) * 2011-11-22 2013-05-24 Valeo Vision Dispositif d'emission de lumiere pour projecteur de vehicule automobile

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE3731232A1 (de) * 1987-09-17 1989-03-30 Bosch Gmbh Robert Scheinwerfer fuer fahrzeuge, insbesondere scheinwerfer fuer kraftfahrzeuge
FR2639888B1 (fr) * 1988-12-07 1993-08-13 Valeo Vision Projecteur de vehicule automobile, comportant un reflecteur a surface complexe a zones intermediaires modifiees
US5045982A (en) * 1989-03-17 1991-09-03 Whelen Technologies, Inc. Wide angle warning light
JPH0368305U (de) * 1989-11-02 1991-07-04
GB8927903D0 (en) * 1989-12-09 1990-02-14 Carello Lighting Plc Lamp assembly
JP2610546B2 (ja) * 1991-01-25 1997-05-14 株式会社小糸製作所 車輌用前照灯の反射鏡
DE4206881A1 (de) * 1992-03-05 1993-09-09 Bosch Gmbh Robert Abblendlichtscheinwerfer fuer kraftfahrzeuge
JP2750647B2 (ja) * 1992-08-14 1998-05-13 株式会社小糸製作所 車輌用前照灯の反射鏡
JP2764369B2 (ja) * 1993-07-26 1998-06-11 株式会社小糸製作所 車輌用前照灯の反射鏡
CZ287690B6 (cs) * 1996-01-29 2001-01-17 Autopal S. R. O. Světlomet s komplexním reflektorem
JP2002251904A (ja) * 2001-02-23 2002-09-06 Ichikoh Ind Ltd 車両用灯具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE656721A (de) * 1964-12-07 1965-04-01
FR1400370A (fr) * 1963-06-17 1965-05-28 Réflecteur pour projecteur lumineux
DE2921474A1 (de) * 1979-05-26 1980-11-27 Daimler Benz Ag Scheinwerferreflektor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE921474C (de) * 1948-10-02 1954-12-20 Siemens Ag Einrichtung zur dielektrischen Behandlung eines band- oder fadenfoermigen Behandlungsgutes
FR2536502B1 (fr) * 1982-11-19 1987-01-09 Cibie Projecteurs Projecteur de croisement pour vehicule automobile
US4506315A (en) * 1982-12-08 1985-03-19 Ichikoh Industries, Ltd. Vehicle headlamp
US4494176A (en) * 1984-03-14 1985-01-15 General Electric Company Lamps having multiple and aimed parabolic sections for increased useful light output
DE3417034A1 (de) * 1984-05-09 1985-11-14 Robert Bosch Gmbh, 7000 Stuttgart Scheinwerfer, insbesondere abblendlicht-scheinwerfer, fuer kraftfahrzeuge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1400370A (fr) * 1963-06-17 1965-05-28 Réflecteur pour projecteur lumineux
BE656721A (de) * 1964-12-07 1965-04-01
DE2921474A1 (de) * 1979-05-26 1980-11-27 Daimler Benz Ag Scheinwerferreflektor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2294536A (en) * 1994-10-27 1996-05-01 Carello Lighting Plc Vehicle headlight with a complex-surface reflector
GB2294536B (en) * 1994-10-27 1998-06-17 Carello Lighting Plc Vehicle headlight with a complex-surface reflector
FR2982929A1 (fr) * 2011-11-22 2013-05-24 Valeo Vision Dispositif d'emission de lumiere pour projecteur de vehicule automobile
EP2597360A1 (de) * 2011-11-22 2013-05-29 Valeo Vision Lichtemittierende Einrichtung für Kraftfahrzeugscheinwerfer

Also Published As

Publication number Publication date
JPS62285301A (ja) 1987-12-11
FR2599120B1 (fr) 1988-09-16
DE3763453D1 (de) 1990-08-02
US4754374A (en) 1988-06-28
EP0247936B1 (de) 1990-06-27
JPH0793042B2 (ja) 1995-10-09
FR2599120A1 (fr) 1987-11-27

Similar Documents

Publication Publication Date Title
EP0247936B1 (de) Abblendlichtscheinwerfer ohne Abblendkappe und mit versetzter Konzentration
EP0250284B1 (de) Abblendlichtscheinwerfer ohne Abblendkappe und mit versetzter Konzentration
EP0466605B1 (de) Reflektor für eine Beleuchtungsvorrichtung eines Fahrzeuges und Scheinwerfer und Signalleuchte mit solchem Reflektor
EP0581679B1 (de) Kfz-Scheinwerfer mit einer Zweifaden-Glühlampe zur selektiven Erzeugung von Nebel- und Fernlicht
EP0250313B1 (de) Zusatzscheinwerfer für Abblendscheinwerfer von Kraftfahrzeugen
EP0791780B1 (de) Fahrzeugscheinwerfer mit einziger Lichtquelle für Ablendlicht und Fernlicht
FR2609148A1 (fr) Projecteur de vehicule automobile comportant un reflecteur a surface complexe a fond modifie
EP0312442A1 (de) Fernlicht-Kraftfahrzeug-Scheinwerfer mit geringer Höhe und mit grosser Ausnutzung des Lichts
EP0684420B1 (de) Scheinwerfer mit einer Zweifadenlampe zur Erzeugung eines Abblendlicht- und eines Fernlichtbündels
EP0645578B1 (de) Scheinwerfer mit glatter Scheibe, insbesondere für Kraftfahrzeuge, und Verfahren zum Herstellen des Reflektors eines solchen Scheinwerfers
EP0933585B1 (de) Kfz-Scheinwerfer mit einer querliegenden Lichtquelle und zum Erzeugen von einer scharfen Lichtbegrenzung
FR2704044A1 (fr) Projecteur du genre elliptique pour véhicule automobile.
FR2760070A1 (fr) Projecteur comportant une lampe a deux filaments pour engendrer un faisceau coupe et un faisceau non coupe
FR2793000A1 (fr) Projecteur bi-fonction a source unique et a optique fixe pour vehicule automobile
FR2583139A1 (fr) Projecteur de croisement pour vehicule automobile
EP0889281B1 (de) Scheinwerfer für Kraftfahrzeuge, der zwei verschiedene Lichtverteilungmuster mit einer einzigen Lichtquelle erzeugen kann
FR2793542A1 (fr) Projecteur du genre elliptique a deux fonctions d'eclairage pour vehicule automobile
EP0258116A1 (de) Scheinwerfer für Abblendlicht und Fernlicht mit zwei Transversalwendeln für Kraftfahrzeuge
FR2773604A1 (fr) Projecteur du genre elliptique pour vehicule automobile
EP1348594B1 (de) Kfz-Scheinwerfer mit einem schwenkbaren, elliptischen Reflektor und einer fixen Linse zur Erzeugung eines Kurvenlichtbündels
EP0926431A1 (de) Kraftfahrzeug- Scheinwerfer mit einem einzigen Reflektor und einer verstellbaren Lichtquelle zur Erzeugung von zwei verschiedenen Lichtbündeln
FR2808867A1 (fr) Projecteur bi-fonction a source lumineuse unique et occulteur mobile pour vehicule automobile
FR2774149A1 (fr) Projecteur de vehicule automobile, comportant une source transversale et apte a engendrer un faisceau a coupure non rectiligne
FR2769687A1 (fr) Ensemble de projecteurs gauche et droit de vehicule automobile, a proprietes photometriques ameliorees
EP1400748A1 (de) Kfz-Scheinwerfer mit einem Spiegel und dazu konjugiertem Umlenkelement zur Erzeugung eines Lichtbündels mit einer nicht horizontalen Hell-Dunkelgrenze

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE

17P Request for examination filed

Effective date: 19880125

17Q First examination report despatched

Effective date: 19890516

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VALEO VISION

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE

REF Corresponds to:

Ref document number: 3763453

Country of ref document: DE

Date of ref document: 19900802

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050510

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061201