EP1096196A1 - Platzsparender Kraftfahrzeugsscheinwerfer, insbesondere Abblendlichtscheinwerfer - Google Patents

Platzsparender Kraftfahrzeugsscheinwerfer, insbesondere Abblendlichtscheinwerfer Download PDF

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Publication number
EP1096196A1
EP1096196A1 EP00402970A EP00402970A EP1096196A1 EP 1096196 A1 EP1096196 A1 EP 1096196A1 EP 00402970 A EP00402970 A EP 00402970A EP 00402970 A EP00402970 A EP 00402970A EP 1096196 A1 EP1096196 A1 EP 1096196A1
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EP
European Patent Office
Prior art keywords
mirror
region
projector according
projector
zone
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Withdrawn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
EP00402970A
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English (en)
French (fr)
Inventor
Benoít c/o Valeo Vision Reiss
Hervé c/o 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
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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 EP1096196A1 publication Critical patent/EP1096196A1/de
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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 motor vehicle headlamps.
  • the first is to recover a sufficient amount of the luminous flux emitted by the source, and we understand that the larger the mirror, for a given base focal length, plus the angle solid covered by the mirror seen from the source is important, and therefore better is the recovery rate; the second is to allow the mirror to generate, in some of its regions, source images which are small enough to form in the beam a spot of concentration (range) sufficiently intense.
  • the present invention aims to overcome these disadvantages of the state of the art, and to propose a projector which, while having a space requirement extremely reduced both in width, in height and in depth, either capable of generating a beam, including a passing beam, and more particularly a European passing beam, having both a suitable span, a width suitable and good homogeneity.
  • Another object of the present invention is to offer a pair of left and right projectors which complement particularly well in terms of lighting and making a new contribution in terms of style at the front of the vehicle.
  • the present invention provides, according to a first aspect a motor vehicle headlamp, comprising a light source cooperating with a mirror to form a lighting beam, characterized in that the mirror has two regions arranged laterally to each other and separated by a border passing in the vicinity of the source, a first region being constructed from at least one horizontal generator having a first distance base focal, in that the first region of the mirror has at least one area a surface reflective which spreads weakly or in no way the light in the lateral direction, and in that the extent of the first region of the mirror in lateral direction by compared to said border is significantly greater than the extent of the second region of the mirror towards lateral with respect to this same plane.
  • the present invention also provides a pair left and right headlights for motor vehicles, characterized in that it consists of two projectors as defined above, the first mirror region of one of the projectors being located on a certain side of the associated lamp and the first mirror region of the other projector being located the other side of the associated lamp.
  • the first region of the mirror of the left projector is located, seen from behind the mirror, at left of the associated lamp while the first region of the right projector mirror is located, seen from the back of the mirror, to the right of the associated lamp.
  • the mirror of the left projector has at least one area spreading the light dominantly to the left
  • the right spotlight mirror has at least one area spreading the light dominantly to the right
  • a mirror 20 able to cooperate with a source such as the filament 10, axially oriented here, of an incandescent lamp such as a standard lamp “H1" or "H7".
  • a source such as the filament 10
  • an incandescent lamp such as a standard lamp “H1” or "H7”.
  • a dump we could also use a dump.
  • the mirror 20 is subdivided into two regions 21, 22 separated by a vertical plane yOz passing through the source 10, these two regions having extents and geometries very different from each other.
  • region 21 located on the left in the figures 1 to 3 is mainly intended to give the beam to generate (here a European crossing beam standard, with “V” cut) its range, that is to say that a substantial fraction of region 21 is intended to generate light in the axis of the road or in the vicinity of this axis, below the cut.
  • V European crossing beam standard
  • Region 22 located on the right in Figures 1 to 3 is intended to ensure a large spread of light, to give the beam its width.
  • Region 21 has a series of zones, the configuration, particularly in terms of generator horizontal, can be similar to what is practiced for a mirror of usual dimensions, that is to say typically having a width of at least 120 millimeters.
  • region 21 has two zones 211 and 212, respectively interior and intermediate, constituting two wide streaks suitable for give reflected light a degree of spreading limited, with preferably blurred lateral boundaries to avoid homogeneity defects in the beam, and to locate this light entirely below the cut standardized.
  • Region 21 also has a set of zones 213, 214 and 215 located on the outside of the region, and intended to generate the spot of concentration of beam.
  • these areas are built at from parabolic base surfaces, while being beam-breaking self-generators, such as taught for example in FR-A-2 536 502 on behalf of the Applicant, and we apply on these base surfaces streaks and / or prisms in accordance with teachings of FR-A-2 710 393 also on behalf of the Applicant.
  • the upper zone 213 is able to generate a cut-off beam part horizontal, and has two rows of streaks or prisms vertical 2131 and 2132 slightly deviating, while the lower zone 215 is suitable, by simple tilting of the surface on for example 15 °, to generate a part beam inclined at 15 °, to define the half-cut inclined from the European beam, and has two rows of slightly deviating streaks or prisms 2151, 2152 inclined at 15 ° to the vertical.
  • Zone 214 is an area with curved ridges 2141 ensuring the transition between zones 213 and 215.
  • the base surface produced in accordance with lessons of FR-A-2 536 502 has in the plan horizontal xOy a horizontal generator which is parabolic shape, with a focal length included preferably between 20 and 28 mm, so that the reflective surface is not too closed around the source.
  • a horizontal generator which is parabolic shape, with a focal length included preferably between 20 and 28 mm, so that the reflective surface is not too closed around the source.
  • the region 22 of the mirror has, for its part, inside to outside (to the right on the Figures 1 to 3), three zones 221, 222 and 223. These zones here consist of streaks in accordance with lessons from FR-A-2 760 067 or FR-A-2 760 068, a difference with the teachings of these documents being however that the different zones present between between them, as shown well Figure 2. This is done for example by pressing a common parable of prismatic forms or analogues, or by pressing the streaks respectively on horizontal generators parabolic focal lengths gradually decreasing.
  • streaks 221 to 223 are designed to ensure strong spread of light, without problem of homogeneity through the use of this type of technology.
  • the horizontal generator of the region 22 is based either on a common parabola or on a series of pieces of staggered dishes.
  • a distance is advantageously chosen focal length between 14 and 16 mm.
  • the region 22 of the mirror is substantially more closed around the source than its region 21, we provides that the mirror is highly asymmetrical in terms of extent on either side of the lamp, like the clearly show Figures 1 to 3.
  • region 21 may have a lateral range of approximately 70 to 80 mm, which allows to be comfortable with the range of the beam.
  • the region 22 is capable of recovering a comparable amount of light flux as region 21 if it has a range of about 15 to 25 mm.
  • the small dimensions can be either those of the mirror itself, either those of an opening 0 provided for example in a mask present in front of the mirror and through which we want to pass a large majority of the radiation reflected by the mirror.
  • Figure 1 shows the contours of a circular opening 0 formed in a mask, and placed with regard to a larger mirror 20 in particular at the level from its shorter focal region (s) 22.
  • Figures 4a to 4d illustrate the behavior optics of the mirror described above.
  • Figure 4a shows the part of the beam that would be generated by the area 215 in the absence of streaks
  • Figure 4b shows the part of the beam actually generated with streaks 2151, 2152.
  • Figure 4c shows the appearance of the part of the beam generated by the entire region 21 of the mirror, the streaks 211, 212 contributing significantly across its width.
  • Figure 4d shows the shape of the beam generated by the entire mirror, and in particular the beam reinforcement in its width zone and also an increase in this width towards the left.
  • the drop D be reflective like the others parts of the mirror, which avoids manipulation of masking during the application of the aluminum layer on the mirror during its manufacture.
  • surface defects which can typically appear when the reflective surface has dropout see their effects minimized for above reasons.
  • the mirror When the mirror is manufactured by injection, can give the plane of the offset D a small angle of draft intended to facilitate the release of the part.
  • Figure 5 illustrates in back view schematic the arrangement adopted for the whole lamp / straight mirror, the references used being same as in the case of the left headlamp, supplemented by a "premium".
  • the 20 'mirror has a straight part 21 'having a scope and a role analogous to those of the left part 21 of the mirror of FIGS. 1 to 3, and a left part 22 'having a similar scope and role to those of the right-hand part 22 of the mirror of FIGS. 1 to 3.
  • the arrangement of the streaks in zones 213'-215 ' which correspond to zones 213-215 Figures 1 to 3 is preferably different, in that sense that the inclined streaks occupy the upper part of the mirror, while the vertical streaks occupy its lower part.
  • Such an arrangement is indeed better suited when these areas are no longer on the left, but at right of the source (in back view), i.e. when the tilt of the source images that are going to be generated is changed to its symmetrical with respect to the vertical (in particular, it is better to align under the half-cut inclined at 15 ° of the images which are tilted counterclockwise relative to a horizontal position, rather than images flipped clockwise watch).
  • region 22 'of the mirror mainly enriches the beam in width to the left, but to the right, so that the two projectors turned on will generate a beam overall crossover having substantially even extended to left and right.
  • Figures 7a and 7b show on the one hand the pace of a part of the beam which would be generated by the areas 213'-215 'of the right mirror 20' in the absence of streaks, and secondly the appearance of the beam portion actually generated when the streaks are present.
  • Figure 8a illustrates the part of beam generated by zones 221 ', 222', 223 ', 211' and 212 'from the mirror (those which give the width), while Figure 8b illustrates the beam portion generated by zones 213 ', 214' and 215 '(it is therefore identical to Figure 7b).
  • FIG. 8c finally illustrates the appearance of the beam overall generated by the right mirror 20 '.
  • the lamp located very close to an edge side of the associated mirror, is not very visible, which makes a new contribution in terms of style.
  • the primary purpose of this variant is to improve the sharpness of the horizontal part of the cut, to including being able to use beam photometry in an automatic adjustment device, known per se, of the height of the passing beams.
  • Figure 9 illustrates a back view of a projector right side according to this variant, that is to say refer to the projector described above with reference in Figures 5 and 6.
  • the half cut horizontal left is essentially formed by an area of small width and height (area 211 ') of the straight region 21' of the mirror. And because of the small width of this area and its height comparatively important, we understand that it generates images of the axial source 10 which are mostly oriented vertically or so moderately inclined to the vertical; this is not very conducive to obtaining a horizontal cut whose sharpness is pronounced.
  • the most horizontal images of the source 10 generated by the zone 211 ' are images of relatively large in size, because these areas, at the height of the source, are in close proximity to this one. This also contributes to imprecision as for the horizontal cut formed.
  • the area left 22 'of the mirror of FIGS. 5 and 6, in particular for the same reasons, would not be suitable for obtaining of a horizontal left half-cut of good sharpness.
  • zone 215 ′ of the mirror compared to what was described above.
  • zone 215 ' is intended to form images of the source 10 directed on the center line of the vehicle (see right part of figure 6).
  • the variant consists of globally rotate this area 215 'around an axis vertical so that its mean direction of illumination is shifted to the left. To avoid deformation light undesirable, this rotation is performed around a vertical axis which passes in the close vicinity of source 10 or on the source.
  • the mirror in Figure 9 also has another difference: zone 212 'is deleted, in favor of an increase of the width extent of zone 211 'and of the extent in width of the zones 213 ', 214' and 215 '.
  • zone 212 ' is deleted, in favor of an increase of the width extent of zone 211 'and of the extent in width of the zones 213 ', 214' and 215 '.
  • zone 216 ' formed of larger prisms or streaks, inclined to contribute to the spread in width under the half-cut tilted at 15 °.
  • Figure 11a illustrates the shape of the part of beam generated by zones 213 ', 214' and 215 '.
  • Figure 11b illustrates the appearance of the part of the beam generated by the front 215 'area modification.
  • FIG. 11c illustrates the appearance of the part of beam generated by zone 215 'when turned towards the left as described above. We can see a angular shift of all light towards the left about 4 °.
  • Figure 11d illustrates the appearance of the game beam cumulatively generated by the zones 213 ′, 214 'and 216' and by the modified 215 'zone.
  • the area 215 'modified allows to define, on the left and near from the center line of the road, a good horizontal cut quality, in particular excellent sharpness.
  • the left side projector such as described above with reference to Figures 1 to 3 do not require modification as described above for the right side projector.
  • the mirror of the left side spotlight inherently generates, thanks in particular at its zone 213, a half cut clear left horizontal near the axis of the road.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP00402970A 1999-10-29 2000-10-26 Platzsparender Kraftfahrzeugsscheinwerfer, insbesondere Abblendlichtscheinwerfer Withdrawn EP1096196A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9913591A FR2800439B1 (fr) 1999-10-29 1999-10-29 Projet de vehicule, notamment projecteur de croisement, a encombrement reduit
FR9913591 1999-10-29

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Publication Number Publication Date
EP1096196A1 true EP1096196A1 (de) 2001-05-02

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EP00402970A Withdrawn EP1096196A1 (de) 1999-10-29 2000-10-26 Platzsparender Kraftfahrzeugsscheinwerfer, insbesondere Abblendlichtscheinwerfer

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EP (1) EP1096196A1 (de)
JP (1) JP2001160310A (de)
FR (1) FR2800439B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1245897A1 (de) * 2001-03-30 2002-10-02 Valeo Vision Kraftfahrzeugabblendscheinwerfer mit geringem Platzbedarf

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005129361A (ja) * 2003-10-23 2005-05-19 Koito Mfg Co Ltd 車両用前照灯
JP5629078B2 (ja) * 2009-10-06 2014-11-19 スタンレー電気株式会社 車両用前照灯及びリフレクタユニット
JP5966674B2 (ja) * 2012-06-28 2016-08-10 市光工業株式会社 車両用灯具
JP7505186B2 (ja) 2020-01-17 2024-06-25 市光工業株式会社 車両用灯具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2921474A1 (de) * 1979-05-26 1980-11-27 Daimler Benz Ag Scheinwerferreflektor
FR2460442A1 (fr) * 1979-06-29 1981-01-23 Cibie Projecteurs Nouvelle structure de projecteur, notamment de projecteur d'automobile
FR2536502A1 (fr) 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur de croisement pour vehicule automobile
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.
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
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2921474A1 (de) * 1979-05-26 1980-11-27 Daimler Benz Ag Scheinwerferreflektor
FR2460442A1 (fr) * 1979-06-29 1981-01-23 Cibie Projecteurs Nouvelle structure de projecteur, notamment de projecteur d'automobile
FR2536502A1 (fr) 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur de croisement pour vehicule automobile
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.
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
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1245897A1 (de) * 2001-03-30 2002-10-02 Valeo Vision Kraftfahrzeugabblendscheinwerfer mit geringem Platzbedarf
FR2822929A1 (fr) * 2001-03-30 2002-10-04 Valeo Vision Projecteur a encombrement reduit pour vehicule automobile
US6871991B2 (en) 2001-03-30 2005-03-29 Valeo Vision Dipped headlight of small size for a motor vehicle

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Publication number Publication date
JP2001160310A (ja) 2001-06-12
FR2800439A1 (fr) 2001-05-04
FR2800439B1 (fr) 2002-02-15

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