EP1245897A1 - Kraftfahrzeugabblendscheinwerfer mit geringem Platzbedarf - Google Patents

Kraftfahrzeugabblendscheinwerfer mit geringem Platzbedarf Download PDF

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Publication number
EP1245897A1
EP1245897A1 EP02290786A EP02290786A EP1245897A1 EP 1245897 A1 EP1245897 A1 EP 1245897A1 EP 02290786 A EP02290786 A EP 02290786A EP 02290786 A EP02290786 A EP 02290786A EP 1245897 A1 EP1245897 A1 EP 1245897A1
Authority
EP
European Patent Office
Prior art keywords
region
cut
mirror
regions
light source
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Withdrawn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
EP02290786A
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English (en)
French (fr)
Inventor
Hervé Valeo Vision Perrin
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 EP1245897A1 publication Critical patent/EP1245897A1/de
Withdrawn legal-status Critical Current

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    • 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
    • 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

Definitions

  • the present invention relates generally to headlamps for motor vehicles, and in particular dipped headlights.
  • Low beam headlights for motor vehicles conventionally consist of a reflecting mirror reflecting light rays emitted by a light source towards the front of the vehicle, a window possibly modifying the path of these rays, to obtain a light beam with photometry predetermined.
  • the larger the mirror, for a given base focal length, plus the solid angle covered by the mirror seen from the source is important, and therefore the better the recovery rate of light flux from the source.
  • the two objectives mentioned above are contradictory: the lower the base focal length of the mirror small, i.e. the more the mirror is closed around the source for a given height and width, the better the stream recovery, but source images are found all enlarged, and the range is insufficient.
  • the range is improved but the overall beam intensity is decreased by unwanted way.
  • the present invention is placed in this context and aims to overcome these drawbacks of the state of the art, by proposing a projector which, while having a space requirement extremely reduced both in width, in height and in depth, or capable of generating a beam, in particular a passing beam, and more particularly a beam of European crossbreeding, presenting both a range suitable, suitable width and good uniformity, the surface of the mirror showing no stalls.
  • the subject of the invention is therefore a dipped headlight for motor vehicles, comprising a light source cooperating with a mirror to form a light beam with a V-cut, the mirror comprising at least three regions arranged laterally with respect to each other, a first region giving the beam its width, a second region giving the beam its range under the horizontal part of the cut, and a third region giving the beam its carried under the inclined part of the cut.
  • each region is connected to the region adjacent without detachment, the first region of the mirror has a reflective surface which strongly spreads the light in lateral direction and the second and third regions are located on the same side of the light source
  • FIG. 1 a mirror 20 of art anterior, intended to cooperate with a light source 10, like an axially oriented filament of a lamp incandescent such as a standard lamp “H1” or “H7”, or again like the electric arc of a discharge lamp.
  • a light source 10 like an axially oriented filament of a lamp incandescent such as a standard lamp “H1” or “H7”, or again like the electric arc of a discharge lamp.
  • the mirror 20 is intended to generate by itself a passing beam without the need to use other optical component, such as streaks or prisms formed on a closing glass arranged in front of the mirror 20.
  • the latter may then be smooth or slightly diverter.
  • the mirror 20 is subdivided into three regions 21, 22, 23, separated by substantially vertical planes parallel to the plane median yOz passing through source 10, these three regions having extent and geometry different from each other.
  • the central region 22 is intended to ensure spreading important light, to give the light beam its width. It can for example be of the type which is described in patents FR-B-2 760 067 and FR-B-2 760 068 at name of the Applicant
  • Region 21 located on the right in Figure 1 is intended mainly to confer on the beam to be generated (here a standard European passing beam, cut-off known as "V") its scope, that is to say that a substantial fraction of the region 21 is intended to generate light in the axis of the road or in the vicinity of this axis, below the cut horizontal.
  • V European passing beam
  • the region 23 located on the left in Figure 1 is suitable for generate, by its upper part, a beam part to horizontal cut, and has rows of streaks or slightly deflecting vertical prisms, while the region 23 is suitable, by simply tilting the surface of for example 15 °, to generate a part of the beam inclined at 15 °, to define the inclined half-cut of the beam of European crossing, and has rows of streaks or slightly deflecting prisms inclined at 15 ° to the vertical.
  • the present invention provides a solution to this problem to obtain a European passing beam, presenting to the times a suitable span, a suitable width and a good homogeneity with a space-saving projector, and whose mirror itself has reduced dimensions.
  • FIG. 2 shows a mirror 30, intended to cooperate with an axial light source 10, such as the filament of a standard filament lamp “H1" or “H7”, or the electric arc of a discharge lamp.
  • an axial light source 10 such as the filament of a standard filament lamp “H1” or “H7”, or the electric arc of a discharge lamp.
  • the mirror 30 is subdivided into four regions 31, 32, 33 and 34, thus identified by their intersection with the horizontal plane xOy. These three regions have extents and geometries different from each other.
  • Region 32 is capable of generating a large spread of light, thus giving the light beam its width. It comprises a series of zones 321, 322, 323, 324 and 325, the configuration of which, in terms in particular of horizontal generator, can be similar to what is practiced for a mirror of usual dimensions.
  • the region 32 has zones constituting streaks capable of imparting to the reflected light a predetermined degree of spreading, with lateral limits 32 G and 32 D (FIG. 4) preferably blurred to avoid defects of homogeneity of the beam, and capable of entirely locating this light below the normalized horizontal cut-off.
  • the teachings of documents FR-A-2 760 067 or FR-A-2 760 068 mentioned above in the name of the Applicant are advantageously used.
  • the region 31, located to the left of the region 32 in Figures 2 to 4, is able to generate the portion of the beam with horizontal cut, to give it its range under this horizontal cut.
  • the region 31 is thus shaped so as to reflect the light rays emitted by the source 10 only in slightly diverging directions, for example comprised between the rays 31 G and 31 D in FIG. 4. This region 31, considered alone, thus gives a contribution to the beam represented by the isolux curves of Figure 5A.
  • the region 33 located to the left of the region 31 in FIGS. 2 to 4, is capable of generating the part of the beam located under the 15 ° cut-off of the passing beam. It is constructed from a parabolic base surface, while being self-generating of the beam cut-off, as for example according to the teachings of document FR-A-2 536 502, in the name of the Applicant, streaks and / or prisms, in accordance with the teachings of document FR-A-2 710 393, also in the name of the Applicant, which can be applied to this base surface, while being inclined by 15 ° to the horizontal.
  • the region 33 is therefore shaped so as to reflect the light rays emitted by the source 10 only in slightly divergent directions, for example between the rays 33 G and 33 D in FIG. 4.
  • the region 33 thus contributes to forming the part of beam represented by the isolux curves of Figure 5B.
  • Region 34 located to the left of region 33 in Figures 2 to 4, is capable of generating the light rays giving the beam its range in the longitudinal axis of the vehicle, and it is shaped so as not to reflect the light rays emitted by the source 10 only in slightly diverging directions, for example comprised between the radii 34 G and 34 D in FIG. 4, and contributing to forming the beam part represented by the isolux curves of FIG. 5C. It is understood that such a surface, in its part furthest from the source 10, will thus generate images of this source which are small enough to give the beam a satisfactory range.
  • the beam generated by the region 34 superimposed on those generated by the regions 31 and 33, contributes to making the connection between these two beams and giving greater homogeneity to the beam.
  • regions 31, 33 and 34 of the mirror are significantly more closed around the source than its region 32, the mirror is expected to be highly asymmetrical in terms of extent on either side of the lamp, like the clearly show Figures 2 to 4.
  • the lamp / mirror assembly intended for be used in the right headlamp in such a way that the lateral offset of the lamp in the mirror is reversed by relative to the offset in the left projector.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP02290786A 2001-03-30 2002-03-28 Kraftfahrzeugabblendscheinwerfer mit geringem Platzbedarf Withdrawn EP1245897A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0104542A FR2822929B1 (fr) 2001-03-30 2001-03-30 Projecteur a encombrement reduit pour vehicule automobile
FR0104542 2001-03-30

Publications (1)

Publication Number Publication Date
EP1245897A1 true EP1245897A1 (de) 2002-10-02

Family

ID=8861908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02290786A Withdrawn EP1245897A1 (de) 2001-03-30 2002-03-28 Kraftfahrzeugabblendscheinwerfer mit geringem Platzbedarf

Country Status (5)

Country Link
US (1) US6871991B2 (de)
EP (1) EP1245897A1 (de)
JP (1) JP2002334605A (de)
CN (1) CN1379204A (de)
FR (1) FR2822929B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2597361A3 (de) * 2011-11-24 2015-06-24 Ichikoh Industries, Ltd. Fahrzeugscheinwerfer mit LED

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070247856A1 (en) * 2006-04-05 2007-10-25 Wang Shih C Lighting unit reflector
WO2009122364A1 (en) * 2008-04-04 2009-10-08 Philips Intellectual Property & Standards Gmbh Projection module for a headlamp
WO2010079397A1 (en) 2009-01-06 2010-07-15 Koninklijke Philips Electronics N.V. Led-based lamp

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536502A1 (fr) 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur de croisement pour vehicule automobile
US4803601A (en) * 1986-12-30 1989-02-07 Cibie Projecteurs Motor vehicle headlight, suitable for emitting a beam limited by a cut-off, and including a modified rear portion
FR2710393A1 (fr) 1993-09-24 1995-03-31 Valeo Vision Projecteur à glace lisse, notamment pour véhicule automobile, et procédé de fabrication du réflecteur d'un tel projecteur.
EP0854316A2 (de) * 1997-01-17 1998-07-22 Stanley Electric Co., Ltd. Scheinwerfer
FR2760068A1 (fr) * 1997-02-21 1998-08-28 Valeo Vision Projecteur de vehicule automobile a miroir a zones juxtaposees lateralement, et procede de fabrication d'un tel miroir
FR2760067A1 (fr) * 1997-02-21 1998-08-28 Valeo Vision Projecteur de vehicule automobile a miroir a zones juxtaposees lateralement, et procede de fabrication d'un tel miroir
FR2760070A1 (fr) * 1997-02-21 1998-08-28 Valeo Vision Projecteur comportant une lampe a deux filaments pour engendrer un faisceau coupe et un faisceau non coupe
EP1096196A1 (de) * 1999-10-29 2001-05-02 Valeo Vision Platzsparender Kraftfahrzeugsscheinwerfer, insbesondere Abblendlichtscheinwerfer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246631A (en) * 1978-05-23 1981-01-20 Lucas Industries Limited Vehicle headlamp
FR2460442A1 (fr) * 1979-06-29 1981-01-23 Cibie Projecteurs Nouvelle structure de projecteur, notamment de projecteur d'automobile
JPH0317362Y2 (de) * 1986-07-10 1991-04-12
US4704661A (en) * 1986-08-25 1987-11-03 General Electric Company Faceted reflector for headlamps
JPH01120702A (ja) * 1987-11-05 1989-05-12 Koito Mfg Co Ltd 車輌用前照灯
JP2591094B2 (ja) * 1988-08-23 1997-03-19 市光工業株式会社 自動車用前照灯
FR2639888B1 (fr) * 1988-12-07 1993-08-13 Valeo Vision Projecteur de vehicule automobile, comportant un reflecteur a surface complexe a zones intermediaires modifiees
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

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536502A1 (fr) 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur de croisement pour vehicule automobile
US4803601A (en) * 1986-12-30 1989-02-07 Cibie Projecteurs Motor vehicle headlight, suitable for emitting a beam limited by a cut-off, and including a modified rear portion
FR2710393A1 (fr) 1993-09-24 1995-03-31 Valeo Vision Projecteur à glace lisse, notamment pour véhicule automobile, et procédé de fabrication du réflecteur d'un tel projecteur.
EP0854316A2 (de) * 1997-01-17 1998-07-22 Stanley Electric Co., Ltd. Scheinwerfer
FR2760068A1 (fr) * 1997-02-21 1998-08-28 Valeo Vision Projecteur de vehicule automobile a miroir a zones juxtaposees lateralement, et procede de fabrication d'un tel miroir
FR2760067A1 (fr) * 1997-02-21 1998-08-28 Valeo Vision Projecteur de vehicule automobile a miroir a zones juxtaposees lateralement, et procede de fabrication d'un tel miroir
FR2760070A1 (fr) * 1997-02-21 1998-08-28 Valeo Vision Projecteur comportant une lampe a deux filaments pour engendrer un faisceau coupe et un faisceau non coupe
FR2760068B1 (fr) 1997-02-21 1999-05-14 Valeo Vision Projecteur de vehicule automobile a miroir a zones juxtaposees lateralement, et procede de fabrication d'un tel miroir
FR2760067B1 (fr) 1997-02-21 1999-05-14 Valeo Vision Projecteur de vehicule automobile a miroir a zones juxtaposees lateralement, et procede de fabrication d'un tel miroir
EP1096196A1 (de) * 1999-10-29 2001-05-02 Valeo Vision Platzsparender Kraftfahrzeugsscheinwerfer, insbesondere Abblendlichtscheinwerfer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2597361A3 (de) * 2011-11-24 2015-06-24 Ichikoh Industries, Ltd. Fahrzeugscheinwerfer mit LED

Also Published As

Publication number Publication date
FR2822929A1 (fr) 2002-10-04
CN1379204A (zh) 2002-11-13
JP2002334605A (ja) 2002-11-22
FR2822929B1 (fr) 2003-12-12
US20030002284A1 (en) 2003-01-02
US6871991B2 (en) 2005-03-29

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