EP1538393A1 - Fahrzeugscheinwerfer mit vertikaler Ausführung - Google Patents

Fahrzeugscheinwerfer mit vertikaler Ausführung Download PDF

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Publication number
EP1538393A1
EP1538393A1 EP04292799A EP04292799A EP1538393A1 EP 1538393 A1 EP1538393 A1 EP 1538393A1 EP 04292799 A EP04292799 A EP 04292799A EP 04292799 A EP04292799 A EP 04292799A EP 1538393 A1 EP1538393 A1 EP 1538393A1
Authority
EP
European Patent Office
Prior art keywords
reflector
optical axis
projector according
ellipsoidal reflector
ellipsoidal
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
EP04292799A
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English (en)
French (fr)
Other versions
EP1538393B1 (de
Inventor
Jean-Luc Meyrenaud
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
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
Priority to PL04292799T priority Critical patent/PL1538393T3/pl
Publication of EP1538393A1 publication Critical patent/EP1538393A1/de
Application granted granted Critical
Publication of EP1538393B1 publication Critical patent/EP1538393B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21S41/36—Combinations of two or more separate 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
    • F21S41/30—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
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations

Definitions

  • the invention relates to a projector for a motor vehicle, including a projector of the type called “verticalized” and comprising at least one reflector associated with at least one light source preferably placed at near the focus of the reflector.
  • a headlamp which, when mounted on the vehicle for which it is intended, a dimension height significantly larger than its width: it is a projector that extends mainly in a vertical direction a once mounted, which is therefore significantly higher than be mounted not exactly vertical in the body of the vehicle).
  • This verticalization is generally induced by the arrangement of the reflector of the projector (of the main projector if there are several), also arranged in the projector so as to be higher than wide once on the vehicle.
  • the object of the invention is to provide a projector intended to equip which, while retaining the benefits of a verticalized reflector, allows to obtain better optical performances, in particular to obtain in a simple and effective way a large width of beam to illuminate the aisles.
  • the invention in the alternative, seeks to get a vertical type projector that can be of dimensions compact, especially with regard to its depth.
  • the invention thus devised a vehicle lighting device which combines two types of reflectors: an ellipsoidal reflector associated with a lens of the type found, for example, in elliptical modules, and a verticalized reflector, preferably sharing the same focal length.
  • the reflector ellipsoidal will rather contribute to the overall beam in the definition of its width, while the verticalized reflector will be used more to define the scope and possibly the cutoff of the overall beam.
  • the beam produced by the ellipsoidal reflector (R1) helps define the width of the entire beam.
  • the beam produced by the verticalized reflector (R2) helps define the range, and possibly the cut, the complete beam.
  • the axis of the light source (S) is arranged in a substantially horizontal plane.
  • this is an angle ⁇ understood between 0 and 80 °, for example between 0 ° and 70 °, in particular between 0 and 50 ° or between 0 and 45 ° with the optical axis (YY) of the ellipsoidal reflector (R1).
  • the surfaces of the verticalized reflector preferably have a focus finding in the vicinity of the light source.
  • the verticalized reflector can have ridges delimiting at least one central facet and two facets sideways inclined towards each other.
  • the beam produced by the verticalized reflector has an opening angle at most equal to ⁇ 15 ° on either side of the optical axis.
  • the beam produced by the ellipsoidal reflector has an opening angle of about ⁇ 40 ° on either side of the optical axis.
  • the plane passing through the axis of the light source (S) is substantially horizontal, the ellipsoidal reflector (R1) being located above this plane and the verticalized reflector (R2) being located below this plane.
  • the projector of the invention may be a dipped beam (or code) for a motor vehicle, in which case the ellipsoidal reflector has a cache located in the vicinity of the external focus so that the outgoing beam is essentially below a certain level, while the reflector vertically is intended to create a V-shaped cut corresponding to that of a passing beam.
  • the cover can be located at the focus or behind the reflector focus ellipsoidal.
  • the upper edge of the cache is located below the horizontal plane passing through the optical axis of the reflector, in particular between 0 and 2 mm below, in particular between 0.5 and 1.8 mm or between 0.7 and 1.7 mm in below, for example about 1.5 mm below.
  • the choice of this rating depends on the definition of the ellipsoidal mirror.
  • This cache layout is advantageous, because it makes it possible to recover a non-annoying portion of flows extra light.
  • the cover can be constituted by a portion of a cylinder with generators vertically, turning its concavity forward, according to the curvature of the field of ellipsoidal reflector.
  • the cache can also have other geometric definitions, for example, be plane. The choice of its shape may depend on the chromaticism of the lens associated with the ellipsoidal mirror.
  • the optical axis of the lens is advantageously offset with respect to the optical axis of the ellipsoidal reflector, on the side of the notch.
  • the lens can be arranged so that its focus is in back, especially at the same level as the top edge of the cache when it is present, and for example about 0.5 to 2 mm back, for example 1.5 mm in rear of the outer focus of the ellipsoidal reflector. This distance may depend, in particular, the focal length of the lens and the definition of the ellipsoid. (The lens can also be exactly at the level of the external focus). This configuration of the lens behind the external focus optimizes the recovery of the maximum luminous flux over the cutoff when there is a hidden.
  • the ellipsoidal reflector may be located below the plane horizontally passing through the transverse axis of the light source and parallel to the optical axis of the reflector, while the verticalized projector is located above of this plan.
  • the light source is a discharge lamp (or xenon lamp).
  • FIGS. 1-3 one can see a bright spotlight P for a motor vehicle comprising a source S whose geometric axis is in a substantially horizontal plane and whose orientation with respect to the axis Y-Y optical of the projector is variable.
  • Figure 1 shows an orientation of the source parallel to the optical axis, we will speak of axial orientation.
  • Figure 2 only symbolizes it in the form of a cross, which is the point where the center of the filament.
  • FIG. 3 represents the optical axis YY and the axis of the source XX, with two possible configurations of the source: the one where the angle ⁇ what the two axes do is 0 °, and that where the angle ⁇ that the two axes make between they are 45 degrees.
  • the source S can be constituted by a halogen lamp having a generally cylindrical filament.
  • this lamp is mounted axially or obliquely in the projector, while in the case of a lamp standardized H3 with cross filament, this H3 lamp is mounted transversely or obliquely in the projector.
  • the source S may be constituted by a xenon lamp producing a generally cylindrical arc and in the axis of the lamp: everything is then, in the sense of the invention, as if we were dealing with a lamp axial filament halogen with regard to the orientation of the lamp.
  • the source S is placed in the vicinity of the internal focal point Fi of a reflector ellipsoidal R1.
  • ellipsoidal reflector is meant a reflector whose surface is defined from two homes respectively an internal focus Fi and a focus externally Fe, this surface approximating an ellipsoid without being necessarily exactly an ellipsoid.
  • the wall of the ellipsoidal reflector R1 in the case where one uses a halogen lamp, has a notch 1 on one side of the plane passing through the axis geometric source S and parallel to the optical axis Y-Y.
  • the plane in question is the horizontal plane passing through the axis geometry of the source S.
  • the notch 1 corresponds substantially to a cutting the lower half of the reflector R1 by an oblique plane.
  • the plan of cut is slightly inclined from the left to the right of Fig.1.
  • the notch 1 is bounded by two edges converging towards the rear of the S source. rear ends of the edges of the notch 1 are connected by a segment orthogonal to the Y-Y axis.
  • the notch 1 is intended to let down, on the side opposite to most of the reflector R1, a maximum of light from the source S.
  • the optical axis of the ellipsoidal reflector R1 coincides with the axis Y-Y optical projector.
  • a lens 2 with an optical axis parallel to or coincident with the Y-axis, is placed in front of the reflector R1 according to the direction of propagation of the light.
  • the lens diameter 2 may be about 50 mm.
  • Lens 2 is preferably low draw (by "draw” is the distance between the lens and the focus external Fe of R1).
  • the invention also applies to lenses of diameter upper, 60 or 70 mm.
  • the accessory parts of the headlamp in particular ice-cream closure and auxiliary equipment to maintain reflector, lens, light source and other parts, are not shown because known in themselves.
  • the focus 3 of the lens 2 is close to, or mistaken for, the focus external Fe of the reflector R1.
  • the focus 3 of the lens is in rear of the external focus Fe of the lens 2 by a distance d, in particular about 1.5 mm.
  • the optical axis 4 of the lens 2 is located lower as the optical axis Y-Y.
  • the vertical distance h between the optical axis 4 of the lens 2 and the Y-Y optical axis is approximately 1.5 mm, which allows recover more light flux from the reflector R1.
  • the filament of the S lamp can be located vertically above the internal focus Fi to increase the luminous flux from the ellipsoidal reflector R1.
  • the projector P is provided to ensure the function code that is to say to provide a passing beam.
  • a cover 5 is disposed in the vicinity of the external focus Fe.
  • the cache 5 is constituted by a opaque wafer, for example metallic, maintained by any appropriate means. Because of the curvature of the field, the cache 5 is flat, and has a profile corresponding to the inverted image in relation to the horizontal of the cut sought.
  • the upper edge of the cover 5 is located below the horizontal plane passing through Y-Y at a distance of about 1 mm.
  • the cache dimensions are at most equal to the horizontal opening of the ellipsoid of the reflector R1.
  • a verticalized reflector R2 is arranged on the side of the notch 1 opposite the major part of the ellipsoidal reflector R1.
  • the intersection of this verticalized reflector R2 by a vertical plane passing through the Y-Y axis is constituted by a curve arc next to a parabola with a focus near the focus Internal Fi.
  • the surface of the reflector R2 is determined by such that a light beam such as 6i from source S is reflected 6th in a direction parallel to or substantially parallel to the Y-Y axis.
  • the verticalized reflector R2 is intended to give images of the source S centered on the Y-Y axis at infinity, that is to say at a distance of several dozens of meters from the projector.
  • the verticalized reflector R2 is intended to focus the beam which it reflects in an angle of opening at most equal to ⁇ 15 ° of other of the Y-Y optical axis.
  • the reflector R2 can comprise streaks C1, C2 determining at least three facets, namely a central facet constituted by a portion of cylindrical surface whose generatrices are horizontal and perpendicular to the plane of Figure 1, and two lateral facets slightly folded towards each other with respect to the central facet.
  • the central facet of vertical reflector contributes essentially to the range of the beam, one of the lateral facets helps to widen the beam reflected by R2 and the other facet side contributes to the range of the beam.
  • the housing of the projector for example has an outline rectangular, noticeably higher than wide.
  • the ellipsoidal reflector R1 produces a light beam having a opening angle of about ⁇ 40 ° on both sides of the Y-Y optical axis.
  • the verticalized reflector R2 is intended to establish the line V cut, corresponding to the regulation of codes in Europe.
  • the operation of the projector P is as follows.
  • the reflector ellipsoidal R1 produces a beam of reduced range but wide, to illuminate the aisles.
  • This example refers to a 45 ° oblique configuration of the source, which is a lamp H 7
  • Isolux illumination curves of this beam on a screen perpendicular to the Y-Y optical axis and located 25 m from the projector are represented in FIGS. 4 and 5, respectively corresponding to the portion of the beam from the verticalized reflector R2 and the beam portion of the projector from the ellipsoidal reflector R1.
  • the abscissa axis corresponds to the trace on the screen of the horizontal plane passing through the optical axis Y-Y of the projector.
  • the graduations in% (percent) on this axis correspond to the tangent of the angle formed between the optical axis and the straight line passing through the focus of projector and cutting the screen at the level of the graduation.
  • the y-axis corresponds to the trace on the screen of the vertical plane passing through the optical axis Y-Y.
  • the graduations in% (percent) of this vertical axis correspond to the tangent the angle formed between the horizontal plane passing through the optical axis and a straight line which goes through the focus of the projector and cuts off the screen at the point of graduation.
  • the isolux curves of the beam produced by the verticalized reflector delimit the specific V cut of a beam code.
  • the closed curve L1 of maximum illumination is located below the plane horizontal, and is offset from the vertical axis to the right, lying under the oblique line of the cut.
  • This curve L1 is surrounded by a sequence closed curves corresponding to increasingly weak illuminations. Some of these curves extend laterally up to ⁇ 15 °.
  • the isolux curve L1 corresponds, in the example under consideration, to a illumination of 24 lux.
  • the maximum illumination is at the center of this curve.
  • the following isolux curves correspond to decreasing illuminations gradually: 20 lux for L2, 16 lux for L3, 12 lux for L4, 6 lux for L5, 3.2 lux for L6.
  • FIG. 5 thus represents the part of the beam coming from the ellipsoidal reflector.
  • the isolux are much wider, what we are looking for as the main function of the mirror R1. This results in an illuminating beam the low sides and bringing comfort in front of the vehicle.
  • the curve V1 maximum illumination is essentially below the horizontal axis, and distributed part and others of the vertical axis.
  • This example relates to an axial configuration of the source, which is a H 7 lamp.
  • Isolux illumination curves of this beam on a screen perpendicular to the Y-Y optical axis and located 25 m from the projector are represented in FIGS. 6 and 7, respectively corresponding to the portion of the beam from the verticalized reflector R2 and the beam portion of the projector from the ellipsoidal reflector R1.
  • the maximum isolux according to the Figure 7 is substantially below the horizontal plane, and distributed approximately symmetrically with respect to the vertical axis. The value maximum is 19.5 lux with regard to Figure 6 ..
  • Figures 8 and 9 illustrate the photometry of the global beams according to the Examples 1 and 2.
  • the total flow according to Example 1 in axial orientation of the source ( Figure 8) is 434.95 lumen. It is 352.16 lumens in the case of the example 2 in oblique orientation of the source ( Figure 9).
  • the common advantage to these two examples is that, whatever the orientation, the source, we get a V of clean cut, satisfactory, with the mirror R2, and with a sufficient luminous flux. We note also the flux increases when the angle ⁇ goes from 45 to 0 °.
  • a Axial orientation of the source thus has the added benefit of a stream more important than in oblique orientation: the gain of flow is not negligible (about 25%).
  • the ellipsoidal reflector R1 is located mainly above the horizontal plane passing through the Y-Y optical axis of the projector, the notch 1 being located below this plane, as well as the verticalized reflector R2.
  • the invention applies not only to a crossover projector P such as the one described, but also to other types of projectors, including a road searchlight.
  • the cache 5 is deleted, and the surfaces of the mirror R2 are recalculated so as to center the maximum isolux on the point (0,0) of the isolux curve, point also called point HV.
  • the presence of the verticalized reflector R2 makes it possible, in the case of a crossing headlamp with 5 cover, better flow performance compared to a projector with a single full ellipsoidal reflector.
  • the gain in flow is the order of 25% because the light beam produced by the verticalized reflector R2 is not decreased by cache 5.
  • the invention makes it possible to adapt a projector according to the invention, the optical surfaces of the reflectors of which are fixed, as a function of dimensional or photometric constraints, adjusting appropriately the orientation of the lamp with respect to the optical axis, which is simple, surprising and effective.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP04292799A 2003-12-05 2004-11-26 Fahrzeugscheinwerfer mit vertikaler Ausführung Not-in-force EP1538393B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04292799T PL1538393T3 (pl) 2003-12-05 2004-11-26 Wypionowany reflektor do pojazdu samochodowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0314320 2003-12-05
FR0314320A FR2863342B1 (fr) 2003-12-05 2003-12-05 Projecteur verticalise pour vehicule automobile

Publications (2)

Publication Number Publication Date
EP1538393A1 true EP1538393A1 (de) 2005-06-08
EP1538393B1 EP1538393B1 (de) 2007-06-13

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EP04292799A Not-in-force EP1538393B1 (de) 2003-12-05 2004-11-26 Fahrzeugscheinwerfer mit vertikaler Ausführung

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EP (1) EP1538393B1 (de)
AT (1) ATE364817T1 (de)
DE (1) DE602004006945T2 (de)
ES (1) ES2289456T3 (de)
FR (1) FR2863342B1 (de)
PL (1) PL1538393T3 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007031253B4 (de) * 2007-07-04 2013-03-28 Automotive Lighting Reutlingen Gmbh Kompakter Ellipsoidscheinwerfer
DE102017113728A1 (de) * 2017-06-21 2018-12-27 Automotive Lighting Reutlingen Gmbh Kraftfahrzeugscheinwerfer

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4772987A (en) * 1985-07-13 1988-09-20 Robert Bosch Gmbh Headlight for antifog lamp for automotive vehicles
FR2637046A1 (fr) * 1988-09-27 1990-03-30 Koito Mfg Co Ltd Phare de vehicule
US5117336A (en) * 1989-09-14 1992-05-26 Hella Kg Hueck & Co. Working spotlight, particularly for motor vehicles
EP0933585A1 (de) * 1998-01-28 1999-08-04 Valeo Vision Kfz-Scheinwerfer mit einer querliegenden Lichtquelle und zum Erzeugen von einer scharfen Lichtbegrenzung
US6059435A (en) * 1997-12-18 2000-05-09 Robert Bosch Gmbh Headlight of a vehicle for high beam light and low beam light
FR2787864A1 (fr) * 1998-12-29 2000-06-30 Bosch Gmbh Robert Projecteur permettant une attenuation de l'eclairage de la zone proche a l'avant du vehicule
JP2001014908A (ja) * 1999-06-28 2001-01-19 Stanley Electric Co Ltd プロジェクタ型前照灯
EP1126210A2 (de) * 2000-02-18 2001-08-22 Stanley Electric Co., Ltd. Fahrzeugscheinwerfer
US20010019483A1 (en) * 2000-01-12 2001-09-06 Kenichi Takada Vehicular headlamp
EP1219887A2 (de) * 2000-12-25 2002-07-03 Stanley Electric Co., Ltd. Fahrzeugscheinwerfer mit einer verstellbaren Blende und einer verstellbaren Reflektorfläche zur Erzeugung eines Abblend- und Fernlichtbündels
FR2823833A1 (fr) * 2001-04-24 2002-10-25 Koito Mfg Co Ltd Phare de vehicule destine a emettre plusieurs faisceaux
EP1286106A1 (de) * 2001-08-14 2003-02-26 Stanley Electric Co., Ltd. Fahrzeugscheinwerfer
EP1433999A1 (de) * 2002-12-24 2004-06-30 Valeo Vision Kfz-Scheinwerfer mit einer querliegenden LIchtquelle

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4772987A (en) * 1985-07-13 1988-09-20 Robert Bosch Gmbh Headlight for antifog lamp for automotive vehicles
FR2637046A1 (fr) * 1988-09-27 1990-03-30 Koito Mfg Co Ltd Phare de vehicule
US5117336A (en) * 1989-09-14 1992-05-26 Hella Kg Hueck & Co. Working spotlight, particularly for motor vehicles
US6059435A (en) * 1997-12-18 2000-05-09 Robert Bosch Gmbh Headlight of a vehicle for high beam light and low beam light
EP0933585A1 (de) * 1998-01-28 1999-08-04 Valeo Vision Kfz-Scheinwerfer mit einer querliegenden Lichtquelle und zum Erzeugen von einer scharfen Lichtbegrenzung
FR2787864A1 (fr) * 1998-12-29 2000-06-30 Bosch Gmbh Robert Projecteur permettant une attenuation de l'eclairage de la zone proche a l'avant du vehicule
JP2001014908A (ja) * 1999-06-28 2001-01-19 Stanley Electric Co Ltd プロジェクタ型前照灯
US20010019483A1 (en) * 2000-01-12 2001-09-06 Kenichi Takada Vehicular headlamp
EP1126210A2 (de) * 2000-02-18 2001-08-22 Stanley Electric Co., Ltd. Fahrzeugscheinwerfer
EP1219887A2 (de) * 2000-12-25 2002-07-03 Stanley Electric Co., Ltd. Fahrzeugscheinwerfer mit einer verstellbaren Blende und einer verstellbaren Reflektorfläche zur Erzeugung eines Abblend- und Fernlichtbündels
FR2823833A1 (fr) * 2001-04-24 2002-10-25 Koito Mfg Co Ltd Phare de vehicule destine a emettre plusieurs faisceaux
EP1286106A1 (de) * 2001-08-14 2003-02-26 Stanley Electric Co., Ltd. Fahrzeugscheinwerfer
EP1433999A1 (de) * 2002-12-24 2004-06-30 Valeo Vision Kfz-Scheinwerfer mit einer querliegenden LIchtquelle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 16 8 May 2001 (2001-05-08) *

Also Published As

Publication number Publication date
FR2863342B1 (fr) 2007-01-05
ES2289456T3 (es) 2008-02-01
DE602004006945T2 (de) 2008-02-21
ATE364817T1 (de) 2007-07-15
PL1538393T3 (pl) 2007-11-30
EP1538393B1 (de) 2007-06-13
DE602004006945D1 (de) 2007-07-26
FR2863342A1 (fr) 2005-06-10

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