EP0933585A1 - Vehicle headlight comprising a transversal source and able to generate a sharp dark-light cut-off - Google Patents

Vehicle headlight comprising a transversal source and able to generate a sharp dark-light cut-off Download PDF

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Publication number
EP0933585A1
EP0933585A1 EP99400178A EP99400178A EP0933585A1 EP 0933585 A1 EP0933585 A1 EP 0933585A1 EP 99400178 A EP99400178 A EP 99400178A EP 99400178 A EP99400178 A EP 99400178A EP 0933585 A1 EP0933585 A1 EP 0933585A1
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EP
European Patent Office
Prior art keywords
mirror
source
projector according
horizontal
generator
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Granted
Application number
EP99400178A
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German (de)
French (fr)
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EP0933585B1 (en
Inventor
Benoit Reiss
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Valeo Vision SAS
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Valeo Vision SAS
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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
    • F21S41/334—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
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • F21S41/173—Fluorescent light sources

Definitions

  • the present invention relates generally motor vehicle headlamps.
  • mirror projectors of the genre parabolic or self-generating beam surface with cut-off generally have, at least at least level of said mirror, a substantially greater width at their height.
  • obtaining a light beam of good quality imposes, especially to give it a peak of concentration in the axis of the road, build the beam with a significant proportion images of the light source (typically the filament of an incandescent lamp or the arc of a lamp discharge), which are small, and this requires so to design a mirror with areas extending as far as possible from the source, and for the reasons above mentioned dimensions, these zones cannot in the practice be distant from the source only in a lateral direction.
  • the light source typically the filament of an incandescent lamp or the arc of a lamp discharge
  • the large expanse of the mirror above and below the source will spawn in this case, with an axial source, a significant proportion images that are strongly inclined to the horizontal, that is to say slightly inclined with respect to the vertical, and this will contribute in the first place to degrade the quality of the cut, secondly to illuminate the road too close to the vehicle, and thirdly to make it difficult to obtain a beam of good width.
  • This section is defined for its upper part by a piece of 20h dish focused at a fixed point Fh (or "high focus") located behind the filament 10, and for its lower part by another piece of dish 20b focused at another fixed point Fb (or “Low focus”) located in front of the filament 10.
  • Fh fixed point
  • Fb fixed point
  • Such sections inevitably lead to generate filament images which either overflow towards the top above a horizontal cut defined at the intersection of the y-y axis with a projection screen, and materialized in "C” in Figure 1 (notably an image I1 emitted by the upper part of the mirror), either are excessively shifted down relative to at cut C (in particular case of an I2 image generated through an intermediate region of the lower part of the mirror).
  • the projector described in this document is only suitable for generating a fog beam at flat cut, and nothing indicates or suggests in this document how a beam could be made with more complex cut-off, in particular a beam of European or American type crossing.
  • the mirror described in this prior art is unable to give the light beam by itself a substantial width, and therefore it's impossible to use glass without optical elements light spreading, which is frequently desired by stylists.
  • the present invention therefore aims to overcome these limitations of the state of the art and to allow make a projector whose mirror can present reduced width compared to spotlights conventional, and a height at least equal to this width, while overcoming these limitations.
  • the present invention provides a projector motor vehicle as defined in the claim 1.
  • FIG. 2 and 3 we have depicted components of a vehicle headlamp automotive, namely the generally cylindrical filament 10 of his lamp and his mirror 20.
  • the other elements of the headlamp namely housing, closing glass and different auxiliary equipment, have not been represented and are classic in themselves.
  • Source could, alternatively, be constituted for example by the generally cylindrical arc of a discharge lamp.
  • the axis of the filament 10 extends, according to a first important characteristic of the invention, horizontally and perpendicular to the optical axis y-y from the mirror. It can typically be either the filament transverse of an H3 standard lamp mounted axially at the bottom of the mirror, or the axial filament of an H1 lamp or H7 mounted laterally in the mirror.
  • the high and low vertical generators, 20h and 20b respectively, of the mirror 20 are designed to so as to bring all the images of the filament 10 to the level of the horizontal level, so as to be able to generate, as will be seen in detail below, beams at good quality clean cut.
  • the generators are built in drawing lines D1 tangent to the surface of the filament 10, these straight lines being on the rear side of the filament for the upper generator 20h, and finding on the front side of the filament as far as the generator 20b.
  • each of these lines D1 corresponding to a light ray emitted by an edge of the filament 10, are respectively associated with lines D2 parallel to the optical axis y-y of the mirror, which itself is substantially parallel to the axis of the vehicle.
  • Each generator is built up close close, starting from the bottom of the mirror 20 which is fixed at a predetermined dimension relative to the filament, from different lines TG obtained, to define a curved line, which will be called in the following "Evolutionary generator” insofar as it does not does not have a fixed hearth, but a set of hearths that evolve gradually as you move along said generator.
  • Evolutionary generator insofar as it does not does not have a fixed hearth, but a set of hearths that evolve gradually as you move along said generator.
  • each image of the filament 10 that they generate is located immediately below and flush with a horizontal cut that passes by the y-y axis.
  • this horizontal generator a parabolic look, with a focus that can either be centered on the filament 10, or preferably offset laterally with respect to this one, and we drag the vertical generator described above along this generator horizontal, this sliding consisting of a translation without rotation of said vertical generator (i.e. that it remains parallel to the plane y0z.) along the horizontal generator.
  • Figure 4 shows by isocandela curves the general appearance of a beam which would be obtained with the parabolic vertical half-generators of the Figure 1, and we observe in particular, in the region central, a light fault immediately below cut-off c-c, which is explained by the presence in this region of filament images whose most point top is shifted down relative to the cut, and in the lateral regions, an overflow of light above this cut, which is explained by the presence of images whose highest point is located above this cut.
  • FIG. 5 which illustrates the pace of a beam which is going to be obtained on the one hand with the generator of the invention illustrated in FIG. 2, and on the other hand with a horizontal generator made up by two focused left and right half-parabolas respectively in the vicinity of the left ends and right of filament 10, shows that the cut c-c is defined practically over the entire width of the beam.
  • Figures 6 and 7 illustrate the plots of images obtained with a mirror as defined above in terms horizontal generator and vertical generator, for a defocus ⁇ F equal to approximately half of the length of the filament, about 2 mm for a filament 4 mm long, and for a mirror of height of 150 mm and width of 80 mm, in which the filament 10 is placed at mid-height.
  • the horizontal images of the filament all come to place immediately below the cutoff (i.e. horizontal level 0%), while tilted images are positioned with their point on higher located substantially on this cut.
  • a mirror for fog beam can be obtained using a horizontal generator formed by a straight line perpendicular to the y-y axis.
  • the mirror therefore has a reflecting surface cylindrical which will have the property of generating filament images which are all located below and at the cutting edge, and which at the same time are strongly offset laterally from the center of the beam.
  • the thickness of the beam will be independent of the height of the mirror. Indeed, the more we extend the mirror upwards or down plus the size of the filament images generated is reduced, these images remaining aligned below of the cut. So we understand that we can play on the height of the mirror to control the light concentration immediately below the break.
  • a passing beam conforming to regulations Europeans is preferably generated by dividing the mirror 20 in different areas as illustrated in the figure 11.
  • the mirror has half upper 21 and lower half 22, which have each nine zones, respectively 211 to 219 and 221 to 229.
  • the different zones have relatively similar widths, and typically between 6 and 13 mm, and are characterized for the essential by horizontal generators different, defined according to the lateral offset and of the desired spread of light.
  • central zones 215 and 225 which generate filament 10 images that are horizontal or very slightly inclined with respect to the horizontal, are intended to perform the horizontal cut over an area important.
  • Their horizontal generator is advantageously a straight line.
  • the other areas of the mirror are used to ensure a satisfactory light distribution of the light in the different areas of the beam.
  • the other areas may possibly present, depending on the function which is assigned to them, surfaces of different types, and in particular surfaces derived from the teachings of documents FR-A-2 536 502, FR-A-2 536 503, FR-A-2 602 305, FR-A-2 602 306, FR-A-2 609 146, FR-A-2 609 148, FR-A-2 639 888, FR-A-2 664 677 and FR-A-2 710 393, on behalf of the Applicant.
  • the generated beam has a reduced thickness
  • This allows to influence the positioning of the images in relation to the cut, and in particular to achieve a less clear cut, desirable in some cases.
  • we move some images down while others remain aligned under the cut so we can thicken the beam and / or move its area down maximum concentration.
  • Figures 12 to 20 illustrate by sets of isocandela curves the beam parts that are generated respectively by zones 214, 213, 212, 211, 216, 217, 218, 219 and 215 of the mirror of FIG. 11, while Figures 21 and 22 illustrate the pace obtained by superimposing the parts of beam of figures 12 to 15 and the beam parts Figures 16 to 19.
  • Figure 23 illustrates the appearance of the beam generated by the upper half of the mirror Figure 11, while Figure 24 illustrates the pace of the beam part generated by its half lower.
  • Figure 25 illustrates the beam pattern overall obtained. We observe that it is a beam having all the qualities required in terms of width, thickness and concentration in the axis of the road.
  • the present invention makes it possible, thanks to the use of a transverse source and generators verticals as described above, mirrors likely to generate by themselves, or with the intervention of optical elements on the ice of closure, projectors whose width is significantly lower than the height.
  • the ratio between height and width can be between 1.2: 1 and 4: 1.
  • the generator horizontal of the mirror can be designed to perform or not a spread of light in width.
  • this spreading can be achieved by ice streaking.
  • We can also perform a combined spread by the mirror and by ice.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The headlamp has a light source (10) set in a reflector (20). The light source is cylindrical and is placed horizontally, transverse to the optical axis (y-y) of the reflector. Part of the reflector profile ensures a ray (D1) emitted tangentially from the edge of the source is reflected (D2) parallel to the optical axis, while rays emitted other parts of the source are reflected downward.

Description

La présente invention concerne d'une façon générale les projecteurs de véhicules automobiles.The present invention relates generally motor vehicle headlamps.

Actuellement, les projecteurs à miroir du genre parabolique ou à surface auto-génératrice de faisceau à coupure (notamment faisceau de croisement ou faisceau antibrouillard), présentent généralement, au moins au niveau dudit miroir, une largeur sensiblement supérieure à leur hauteur.Currently, mirror projectors of the genre parabolic or self-generating beam surface with cut-off (in particular passing beam or beam fog), generally have, at least at least level of said mirror, a substantially greater width at their height.

Ceci s'explique par plusieurs considérations. Tout d'abord, les constructeurs de véhicules automobiles ont tendance à réaliser des véhicules de plus en plus aérodynamiques, et un facteur important de l'aérodynamisme tient à une forme générale relativement effilée du véhicule vers l'avant, avec un capot plongeant, et en conséquence un espace à l'avant du véhicule, la où l'on place les projecteurs, dont la hauteur est de plus en plus réduite.This is explained by several considerations. All first, motor vehicle manufacturers have tendency to make more and more vehicles aerodynamics, and an important factor in aerodynamics have a relatively general shape tapered vehicle forward, with hood plunging, and consequently a space in front of the vehicle, where the spotlights are placed, including height is more and more reduced.

Parallèlement, la hauteur des projecteurs étant réduite, un bon rendement lumineux exige de maintenir une surface réfléchissante de superficie importante, et cette superficie ne peut donc être gagnée que latéralement.At the same time, the height of the spotlights being reduced, good light output requires maintaining a large area reflecting surface, and this area can therefore only be gained laterally.

En outre, l'obtention d'un faisceau lumineux de bonne qualité impose, en particulier pour lui donner une pointe de concentration dans l'axe de la route, de construire le faisceau avec une proportion significative d'images de la source lumineuse (typiquement le filament d'une lampe à incandescence ou l'arc d'une lampe à décharge), qui soient de petite taille, et ceci impose donc de concevoir un miroir avec des zones s'étendant aussi loin que possible de la source, et pour les raisons d'encombrement précité, ces zones ne peuvent dans la pratique être éloignées de la source que dans une direction latérale.In addition, obtaining a light beam of good quality imposes, especially to give it a peak of concentration in the axis of the road, build the beam with a significant proportion images of the light source (typically the filament of an incandescent lamp or the arc of a lamp discharge), which are small, and this requires so to design a mirror with areas extending as far as possible from the source, and for the reasons above mentioned dimensions, these zones cannot in the practice be distant from the source only in a lateral direction.

En corollaire, les projecteurs classiques ayant ce type de contour travaillent de façon optimale avec une source lumineuse orientée axialement, une telle orientation contribuant au rendement lumineux global et créant, avec des miroirs très allongés latéralement, une grande proportion d'images faiblement inclinées par rapport à l'horizontale sur un écran de projection. Ceci est propice à l'obtention de faisceaux présentant une coupure nette et un étalement latéral substantiel.As a corollary, conventional projectors having this contour type work optimally with a axially oriented light source, such orientation contributing to the overall light output and creating, with mirrors very elongated laterally, a large proportion of images slightly tilted by compared to the horizontal on a projection screen. This is conducive to obtaining beams having a clean cut and substantial lateral spread.

Or il existe à l'heure actuelle, à l'encontre de la tendance très largement rencontrée depuis de nombreuses années, une demande de la part des constructeurs pour des projecteurs ayant au contraire une forme telle que leur largeur soit égale ou inférieure à leur hauteur.However, there is currently, against the trend very widely encountered for many years, a request from manufacturers for projectors on the contrary having a shape such as their width is equal to or less than their height.

Ce nouveau type de contour soulève, avec les projecteurs de conception optique classique, de nombreuses difficultés.This new type of contour raises, with the projectors of classic optical design, many difficulties.

Tout d'abord, l'étendue importante du miroir au-dessus et au-dessous de la source va engendrer dans ce cas, avec une source axiale, une proportion importante d'images fortement inclinées par rapport à l'horizontale, c'est-à-dire faiblement inclinées par rapport à la verticale, et ceci va contribuer de première part à dégrader la qualité de la coupure, de deuxième part à éclairer la route à trop grande proximité du véhicule, et de troisième part à rendre délicate l'obtention d'un faisceau de bonne largeur.First, the large expanse of the mirror above and below the source will spawn in this case, with an axial source, a significant proportion images that are strongly inclined to the horizontal, that is to say slightly inclined with respect to the vertical, and this will contribute in the first place to degrade the quality of the cut, secondly to illuminate the road too close to the vehicle, and thirdly to make it difficult to obtain a beam of good width.

On a déjà proposé dans le passé, notamment dans le document FR-A-2 602 305 au nom de la Demanderesse, un projecteur antibrouillard présentant une source transversale et un miroir susceptible de présenter une hauteur supérieure à sa largeur.We have already proposed in the past, especially in the document FR-A-2 602 305 in the name of the Applicant, a fog light with source transverse and a mirror likely to have a height greater than its width.

Ce projecteur connu présente toutefois des inconvénients en matière de répartition des images de la source. Plus particulièrement, et si l'on se réfère maintenant à la figure 1 des dessins, on a représenté la section verticale axiale de la surface réfléchissante décrite dans ce document.However, this known projector has drawbacks in terms of distributing the images of the source. More specifically, and if we refer now in Figure 1 of the drawings, the axial vertical section of the reflecting surface described in this document.

Cette section est définie pour sa partie supérieure par un morceau de parabole 20h focalisé en un point fixe Fh (ou « foyer haut ») situé en arrière du filament 10, et pour sa partie inférieure par un autre morceau de parabole 20b focalisé en un autre point fixe Fb (ou « foyer bas ») situé en avant du filament 10. On comprend que de telles sections conduisent inévitablement à engendrer des images du filament qui, soit débordent vers le haut au-dessus d'une coupure horizontale définie à l'intersection de l'axe y-y avec un écran de projection, et matérialisée en « C » sur la figure 1 (cas notamment d'une image I1 émise par la partie supérieure du miroir), soit sont excessivement décalées vers le bas par rapport à la coupure C (cas notamment d'une image I2 engendrée par une région intermédiaire de la partie inférieure du miroir).This section is defined for its upper part by a piece of 20h dish focused at a fixed point Fh (or "high focus") located behind the filament 10, and for its lower part by another piece of dish 20b focused at another fixed point Fb (or "Low focus") located in front of the filament 10. We understand that such sections inevitably lead to generate filament images which either overflow towards the top above a horizontal cut defined at the intersection of the y-y axis with a projection screen, and materialized in "C" in Figure 1 (notably an image I1 emitted by the upper part of the mirror), either are excessively shifted down relative to at cut C (in particular case of an I2 image generated through an intermediate region of the lower part of the mirror).

Il en résulte donc une coupure qui reste très perfectible.This therefore results in a cut which remains very perfectible.

En outre, le projecteur décrit dans ce document est uniquement apte à engendrer un faisceau antibrouillard à coupure plate, et rien n'indique ou ne suggère dans ce document la façon dont pourrait être réalisé un faisceau à coupure plus complexe, notamment un faisceau de croisement de type européen ou américain. In addition, the projector described in this document is only suitable for generating a fog beam at flat cut, and nothing indicates or suggests in this document how a beam could be made with more complex cut-off, in particular a beam of European or American type crossing.

Au surplus, le miroir décrit dans cette antériorité est incapable de donner par lui-même au faisceau lumineux une largeur substantielle, et il est donc impossible d'avoir recours à une glace dépourvue d'éléments optiques d'étalement de la lumière, qui pourtant est fréquemment souhaitée par les stylistes.In addition, the mirror described in this prior art is unable to give the light beam by itself a substantial width, and therefore it's impossible to use glass without optical elements light spreading, which is frequently desired by stylists.

La présente invention vise donc à pallier ces limitations de l'état de la technique et à permettre de réaliser un projecteur dont le miroir puisse présenter une largeur réduite par rapport aux projecteurs conventionnels, et une hauteur au moins égale à cette largeur, tout en s'affranchissant de ces limitations.The present invention therefore aims to overcome these limitations of the state of the art and to allow make a projector whose mirror can present reduced width compared to spotlights conventional, and a height at least equal to this width, while overcoming these limitations.

Ainsi la présente invention propose un projecteur de véhicule automobile tel que défini dans la revendication 1.Thus the present invention provides a projector motor vehicle as defined in the claim 1.

Des aspects préférés, mais non limitatifs, du projecteur selon l'invention sont définis dans les revendications dépendantes.Preferred, but not limiting, aspects of projector according to the invention are defined in dependent claims.

D'autres aspects, buts et avantages de la présente invention apparaítront mieux à la lecture de la description détaillée suivante de formes de réalisation préférées de celle-ci, donnée à titre d'exemple et faire en référence aux dessins annexés, sur lesquels :

  • la figure 1 est une vue schématique en coupe verticale axiale d'un filament transversal et d'un miroir de l'art antérieur,
  • la figure 2 est une vue schématique en coupe verticale axiale d'un filament transversal et d'un miroir selon la présente invention,
  • la figure 3 est une vue de face du filament et du miroir de la figure 2,
  • les figures 4 et 5 illustrent respectivement par des courbes isocandela les répartitions lumineuses obtenues en principe avec la solution de l'art antérieur de la figure 1 et l'approche de la présente invention, respectivement,
  • les figures 6 et 7 illustrent par des tracés d'images de la source le comportement optique des moitiés supérieure et inférieure du miroir de la figure 3,
  • les figures 8 et 9 illustrent par des ensembles de courbes isocandela sur un écran de projection le comportement optique des moitiés supérieure et inférieure du miroir de la figure 3,
  • la figure 10 illustre par un ensemble de courbes isocandela le comportement optique de l'ensemble de ce miroir,
  • la figure 11 est une vue de face d'une forme de réalisation concrète d'un miroir apte à engendrer un certain type de faisceau à coupure, et
  • les figures 12 à 25 illustrent par des ensembles de courbes isocandela respectifs le comportement optique du miroir de la figure 11 sous-zone par sous-zone, zone par zone et dans son ensemble.
    • Other aspects, aims and advantages of the present invention will appear better on reading the following detailed description of preferred embodiments thereof, given by way of example and with reference to the appended drawings, in which:
  • FIG. 1 is a schematic view in axial vertical section of a transverse filament and of a mirror of the prior art,
  • FIG. 2 is a schematic view in axial vertical section of a transverse filament and of a mirror according to the present invention,
  • FIG. 3 is a front view of the filament and of the mirror of FIG. 2,
  • FIGS. 4 and 5 respectively illustrate by isocandela curves the light distributions obtained in principle with the solution of the prior art of FIG. 1 and the approach of the present invention, respectively,
  • FIGS. 6 and 7 illustrate by drawing images of the source the optical behavior of the upper and lower halves of the mirror of FIG. 3,
  • FIGS. 8 and 9 illustrate by sets of isocandela curves on a projection screen the optical behavior of the upper and lower halves of the mirror of FIG. 3,
  • FIG. 10 illustrates by a set of isocandela curves the optical behavior of the assembly of this mirror,
  • FIG. 11 is a front view of a concrete embodiment of a mirror capable of generating a certain type of cut-off beam, and
  • Figures 12 to 25 illustrate by sets of respective isocandela curves the optical behavior of the mirror of Figure 11 sub-area by sub-area, area by area and as a whole.

    • En référence tout d'abord aux figures 2 et 3, on a représenté des composants d'un projecteur de véhicule automobile, à savoir le filament généralement cylindrique 10 de sa lampe et son miroir 20. Les autres éléments du projecteur, à savoir boítier, glace de fermeture et différents équipements auxiliaires, n'ont pas été représentés et sont classiques en eux-mêmes . La source pourrait, en variante, être constituée par exemple par l'arc généralement cylindrique d'une lampe à décharge. Referring first to Figures 2 and 3, we have depicted components of a vehicle headlamp automotive, namely the generally cylindrical filament 10 of his lamp and his mirror 20. The other elements of the headlamp, namely housing, closing glass and different auxiliary equipment, have not been represented and are classic in themselves. Source could, alternatively, be constituted for example by the generally cylindrical arc of a discharge lamp.

    L'axe du filament 10 s'étend, selon une première caractéristique importante de l'invention, horizontalement et perpendiculairement à l'axe optique y-y du miroir. Il peut s'agir typiquement, soit du filament transversal d'une lampe normalisée H3 montée axialement au fond du miroir, soit du filament axial d'une lampe H1 ou H7 montée latéralement dans le miroir.The axis of the filament 10 extends, according to a first important characteristic of the invention, horizontally and perpendicular to the optical axis y-y from the mirror. It can typically be either the filament transverse of an H3 standard lamp mounted axially at the bottom of the mirror, or the axial filament of an H1 lamp or H7 mounted laterally in the mirror.

    Selon une caractéristique essentielle de l'invention, les génératrices verticales haute et basse, respectivement 20h et 20b, du miroir 20 sont conçues de manière à amener toutes les images du filament 10 au ras du niveau horizontal, de manière à pouvoir engendrer, comme on le verra en détail plus loin, des faisceaux à coupure nette de bonne qualité.According to an essential characteristic of the invention, the high and low vertical generators, 20h and 20b respectively, of the mirror 20 are designed to so as to bring all the images of the filament 10 to the level of the horizontal level, so as to be able to generate, as will be seen in detail below, beams at good quality clean cut.

    Plus précisément, et en référence particulièrement à la figure 2, les génératrices sont construites en traçant des droites D1 tangentes à la surface du filament 10, ces droites se trouvant du côté arrière du filament pour ce qui concerne la génératrice supérieure 20h, et se trouvant du côté avant du filament pour ce qui concerne la génératrice 20b.More specifically, and with particular reference in figure 2, the generators are built in drawing lines D1 tangent to the surface of the filament 10, these straight lines being on the rear side of the filament for the upper generator 20h, and finding on the front side of the filament as far as the generator 20b.

    A chacune de ces droites D1, correspondant à un rayon lumineux émis par un bord du filament 10, sont respectivement associées des droites D2 parallèles à l'axe optique y-y du miroir, qui lui même est sensiblement parallèle à l'axe du véhicule.To each of these lines D1, corresponding to a light ray emitted by an edge of the filament 10, are respectively associated with lines D2 parallel to the optical axis y-y of the mirror, which itself is substantially parallel to the axis of the vehicle.

    Pour chaque couple de droites (D1, D2) on détermine leur bissectrice BS et la droite TG qui est perpendiculaire à cette bissectrice.For each pair of lines (D1, D2) we determine their bisector BS and the straight line TG which is perpendicular to this bisector.

    Chaque génératrice est construite de proche en proche, en partant du fond du miroir 20 que l'on fixe à une cote prédéterminée par rapport au filament, à partir des différentes droites TG obtenues, pour définir une ligne courbe, que l'on appellera dans la suite « génératrice évolutive » dans la mesure où elle ne présente pas un foyer fixe, mais un ensemble de foyers qui évoluent progressivement à mesure que l'on se déplace le long de ladite génératrice. Ces génératrices se distinguent en cela des génératrices à foyer fixe, c'est-à-dire paraboliques, décrites en référence à la figure 1.Each generator is built up close close, starting from the bottom of the mirror 20 which is fixed at a predetermined dimension relative to the filament, from different lines TG obtained, to define a curved line, which will be called in the following "Evolutionary generator" insofar as it does not does not have a fixed hearth, but a set of hearths that evolve gradually as you move along said generator. These generators are distinguish in this way from generators with fixed focus, that is to say dishes, described with reference to Figure 1.

    On comprend ici qu'en jouant sur la distance horizontale entre le fond du miroir 20 et le filament 10, on va pouvoir ainsi concevoir des génératrices 20a, 20b plus ou moins ouvertes ou fermées autour de la source, et donc jouer d'une part sur la taille des images du filament engendrées, et d'autre part sur la quantité de flux lumineux que le miroir récupère sur une hauteur donnée.We understand here that by playing on the distance horizontal between the bottom of the mirror 20 and the filament 10, we will be able to design generators 20a, 20b more or less open or closed around the source, and therefore play on the one hand on the size of the images of the filament generated, and on the other hand on the amount of luminous flux that the mirror recovers over a height given.

    L'équation différentielle des génératrices 20h et 20b, qu'il est aisé de résoudre par des moyens de calcul assistés par ordinateur, peut s'exprimer de la façon suivante : Δz = Δb.(z.sinβ - y.cosβ) Δy = Δz.tg(β/2) avec comme conditions initiales : z = -Rfil y = -F où :

  • (y,z) : repère orthonormé dont l'origine est au centre du filament 10, y étant l'axe optique horizontal et z étant vertical.
  • Rfil : rayon du filament, et
  • F : distance mesurée selon y entre le centre du filament et le fond du miroir.
    • The differential equation of the generators 20h and 20b, which is easy to solve by means of computer-aided calculation, can be expressed as follows: Δz = Δb. (Z.sinβ - y.cosβ) Δy = Δz.tg (β / 2) with as initial conditions: z = -Rfil y = -F or :
  • (y, z): orthonormal reference whose origin is at the center of the filament 10, y being the horizontal optical axis and z being vertical.
  • Rfil: radius of the filament, and
  • F: distance measured along y between the center of the filament and the bottom of the mirror.

    • On comprend que, grâce à une telle conception des génératrices 20h, 20b, on aboutit à ce que chaque image du filament 10 qu'elles engendrent se situe immédiatement au-dessous et au ras d'une coupure horizontale qui passe par l'axe y-y.We understand that, thanks to such a conception of generators 8 p.m., 8 p.m., each image of the filament 10 that they generate is located immediately below and flush with a horizontal cut that passes by the y-y axis.

    A partir de là, il est possible d'engendrer différentes types de faisceaux, dont on peut jouer si on le souhaite sur la largeur en jouant sur la génératrice horizontale de la surface réfléchissante du miroir 20.From there, it is possible to generate different types of beams, which we can play if we want it across by playing on the generator horizontal of the reflecting surface of the mirror 20.

    Dans une forme de réalisation de base, on donne à cette génératrice horizontale une allure parabolique, avec un foyer qui peut être soit centré sur le filament 10, soit de préférence décalé latéralement par rapport à celui-ci, et l'on fait glisser la génératrice verticale décrite plus haut le long de cette génératrice horizontale, ce glissement consistant en une translation sans rotation de ladite génératrice verticale (c'est-à-dire qu'elle reste parallèle au plan y0z.) le long de la génératrice horizontale.In a basic embodiment, we give this horizontal generator a parabolic look, with a focus that can either be centered on the filament 10, or preferably offset laterally with respect to this one, and we drag the vertical generator described above along this generator horizontal, this sliding consisting of a translation without rotation of said vertical generator (i.e. that it remains parallel to the plane y0z.) along the horizontal generator.

    Dans ce cas, l'équation de la génératrice horizontale peut s'exprimer par exemple comme suit : y = 0,25. [x + x/x.Lfil.z/(2.z))2/(F+δF)] - F où :

  • x,y,z sont les coordonnées du point courant ;
  • F est la distance focale de base décrite plus haut à propos de la génératrice verticale ;
  • δF est la valeur du décalage latéral de l'axe de la génératrice horizontale parabolique par rapport au centre du filament ; et
  • Lfil est la demi-longueur du filament mesurée selon x.
    • In this case, the equation of the horizontal generator can be expressed for example as follows: y = 0.25. [x + x /x.Lfil. z /(2.z)) 2 / (F + δF)] - F or :
  • x, y, z are the coordinates of the current point;
  • F is the basic focal length described above with respect to the vertical generator;
  • δF is the value of the lateral offset of the axis of the horizontal parabolic generator with respect to the center of the filament; and
  • Lfil is the half-length of the filament measured along x.

    • La figure 4 montre par des courbes isocandela l'allure générale d'un faisceau qui serait obtenu avec les demi-génératrices verticales paraboliques de la figure 1, et l'on observe en particulier, dans la région centrale, un défaut de lumière immédiatement au-dessous de la coupure c-c, qui s'explique par la présence dans cette région d'images du filament dont le point le plus haut est décalé vers le bas par rapport à la coupure, et dans les régions latérales, un débordement de la lumière au-dessus de cette coupure, qui s'explique quant à lui par la présence d'images dont le point le plus haut est situé au-dessus de cette coupure.Figure 4 shows by isocandela curves the general appearance of a beam which would be obtained with the parabolic vertical half-generators of the Figure 1, and we observe in particular, in the region central, a light fault immediately below cut-off c-c, which is explained by the presence in this region of filament images whose most point top is shifted down relative to the cut, and in the lateral regions, an overflow of light above this cut, which is explained by the presence of images whose highest point is located above this cut.

    Au contraire la figure 5, qui illustre l'allure d'un faisceau qui va être obtenu d'une part avec la génératrice de l'invention illustrée sur la figure 2, et d'autre part avec une génératrice horizontale constituée par deux demi-paraboles gauche et droite focalisées respectivement au voisinage des extrémités gauche et droite du filament 10, montre que la coupure c-c est définie pratiquement sur toute la largeur du faisceau.On the contrary Figure 5, which illustrates the pace of a beam which is going to be obtained on the one hand with the generator of the invention illustrated in FIG. 2, and on the other hand with a horizontal generator made up by two focused left and right half-parabolas respectively in the vicinity of the left ends and right of filament 10, shows that the cut c-c is defined practically over the entire width of the beam.

    Les figures 6 et 7 illustrent les tracés d'images obtenus avec un miroir tel que défini ci-dessus en termes de génératrice horizontale et de génératrice verticale, pour une défocalisation δF égale environ à la moitié de la longueur du filament, soit environ 2 mm pour un filament de 4 mm de longueur, et pour un miroir d'une hauteur de 150 mm et d'une largeur de 80 mm, dans lequel le filament 10 est placé à mi-hauteur. On observe sur ces figures que les images horizontales du filament viennent toutes se placer immédiatement au-dessous de la coupure (à savoir le niveau horizontal 0%), tandis que les images inclinées sont positionnées avec leur point le plus haut situé sensiblement sur cette coupure.Figures 6 and 7 illustrate the plots of images obtained with a mirror as defined above in terms horizontal generator and vertical generator, for a defocus δF equal to approximately half of the length of the filament, about 2 mm for a filament 4 mm long, and for a mirror of height of 150 mm and width of 80 mm, in which the filament 10 is placed at mid-height. We observe on these figures as the horizontal images of the filament all come to place immediately below the cutoff (i.e. horizontal level 0%), while tilted images are positioned with their point on higher located substantially on this cut.

    On observe également que, malgré la forme spécifique du miroir, allongé verticalement, il n'existe aucune grande image inclinée par rapport à l'horizontale, susceptible d'éclairer la route à trop grande proximité du véhicule.We also observe that, despite the shape specific to the mirror, stretched vertically, there is no large image tilted relative to the horizontal, likely to light the road too close of the vehicle.

    Les courbes isocandela correspondantes sont illustrées sur les figures 8 et 9, tandis que la figure 10 illustre l'allure de l'ensemble du faisceau obtenu.The corresponding isocandela curves are illustrated in Figures 8 and 9, while Figure 10 illustrates the appearance of the entire beam obtained.

    On comprend qu'en dotant la glace de fermeture du projecteur de stries d'étalement latéral, et le cas échéant de prismes, on peut réaliser un faisceau antibrouillard tout à fait satisfaisant, ou encore un faisceau de croisement conformé aux normes des Etats-Unis d'Amérique.We understand that by providing the closing glass with the lateral spreading streak projector, and case if necessary with prisms, a beam can be produced completely satisfactory fog light, or even a passing beam conforms to United States standards of America.

    Alors que l'on a décrit plus haut la génération d'une surface réfléchissante par translation sans rotation de la génératrice verticale illustrée sur la figure 2 le long d'une génératrice horizontale donnée, il est bien entendu possible d'utiliser toute autre technique appropriée pour cette génération. En particulier, on peut faire glisser la génératrice verticale de la figure 2 le long de la génératrice horizontale en faisant tourner son plan pour qu'il se situe, en chaque endroit de la génératrice horizontale, par exemple dans un plan vertical contenant le rayon réfléchi en cet endroit de ladite génératrice horizontale, ou encore dans un plan vertical contenant le vecteur normal en cet endroit de ladite génératrice horizontale. On peut également utiliser une génératrice verticale qui évolue à mesure de son déplacement le long de la génératrice horizontale, cette évolution étant obtenue par exemple en redessinant la génératrice verticale selon les principes expliqués en référence à la figure 2 pour chacune de ses positions le long de la génératrice horizontale.While the generation described above a translational reflecting surface without rotation of the vertical generator illustrated on the Figure 2 along a given horizontal generator, it it is of course possible to use any other appropriate technique for this generation. In particular, we can drag the generator vertical of figure 2 along the generator horizontal by rotating its plane so that it locate, in each place of the horizontal generator, for example in a vertical plane containing the radius reflected in this place of said generator horizontal, or in a vertical plane containing the normal vector at this location of said generator horizontal. You can also use a generator vertical which evolves as it moves along of the horizontal generator, this evolution being obtained for example by redrawing the generator vertical according to the principles explained with reference to the Figure 2 for each of its positions along the horizontal generator.

    On va maintenant décrire en détail un miroir défini avec la génératrice verticale décrite plus haut en référence à la figure 2, mais susceptible d'engendrer par lui-même, c'est-à-dire sans l'intervention de la glace de fermeture, un faisceau large pouvant constituer selon les cas un faisceau antibrouillard ou un faisceau de croisement conforme notamment aux normes européennes ou américaines.We will now describe in detail a defined mirror with the vertical generator described above in reference to Figure 2, but likely to cause itself, that is to say without the intervention of the ice of closure, a wide beam which can constitute according to case a fog light beam or a cross compliance in particular with European standards or American.

    Un miroir pour faisceau antibrouillard peut être obtenu en utilisant une génératrice horizontale constituée par une droite perpendiculaire à l'axe y-y. Le miroir présente donc une surface réfléchissante cylindrique qui va avoir pour propriété d'engendrer des images du filament qui sont toutes situées au-dessous et au raz de la coupure, et qui dans le même temps sont fortement décalées latéralement par rapport au centre du faisceau.A mirror for fog beam can be obtained using a horizontal generator formed by a straight line perpendicular to the y-y axis. The mirror therefore has a reflecting surface cylindrical which will have the property of generating filament images which are all located below and at the cutting edge, and which at the same time are strongly offset laterally from the center of the beam.

    On peut naturellement envisager dans ce cas, pour moduler la largeur du faisceau, toute autre courbe de préférence dérivable, voire deux fois dérivable, située entre la parabole décrite plus haut et la droite précitée. One can naturally envisage in this case, for modulate the beam width, any other curve preferably differentiable, or even twice differentiable, located between the parable described above and the right cited above.

    Il est important d'observer ici qu'avec une génératrice verticale selon l'invention, l'épaisseur du faisceau va se trouver indépendante de la hauteur du miroir. En effet, plus on prolonge le miroir vers le haut ou vers le bas, plus la taille des images du filament engendrées est réduite, ces images restant alignées au-dessous de la coupure. On comprend donc que l'on peut jouer sur la hauteur du miroir pour contrôler la concentration de lumière immédiatement au-dessous de la coupure.It is important to observe here that with a vertical generator according to the invention, the thickness of the beam will be independent of the height of the mirror. Indeed, the more we extend the mirror upwards or down plus the size of the filament images generated is reduced, these images remaining aligned below of the cut. So we understand that we can play on the height of the mirror to control the light concentration immediately below the break.

    Un faisceau de croisement conforme aux règlements européens est engendré de préférence en divisant le miroir 20 en différentes zones comme illustré sur la figure 11.A passing beam conforming to regulations Europeans is preferably generated by dividing the mirror 20 in different areas as illustrated in the figure 11.

    Sur cette figure, le miroir possède une moitié supérieure 21 et une moitié inférieure 22, qui comportent chacune neuf zones, respectivement 211 à 219 et 221 à 229.In this figure, the mirror has half upper 21 and lower half 22, which have each nine zones, respectively 211 to 219 and 221 to 229.

    Dans l'exemple représenté, les différentes zones ont des largeurs relativement voisines, et typiquement comprises entre 6 et 13 mm, et sont caractérisées pour l'essentiel par des génératrices horizontales différentes, définies en fonction du décalage latéral et de l'étalement souhaités de la lumière.In the example shown, the different zones have relatively similar widths, and typically between 6 and 13 mm, and are characterized for the essential by horizontal generators different, defined according to the lateral offset and of the desired spread of light.

    Ainsi les zones centrales 215 et 225 qui engendrent des images du filament 10 qui sont horizontales ou très peu inclinées par rapport à l'horizontale, sont destinées à réaliser la coupure horizontale sur une étendue importante. Leur génératrice horizontale est avantageusement une droite.Thus the central zones 215 and 225 which generate filament 10 images that are horizontal or very slightly inclined with respect to the horizontal, are intended to perform the horizontal cut over an area important. Their horizontal generator is advantageously a straight line.

    Les zones 214 et 226 ont pour caractéristique, de par leur positionnement, d'engendrer des images du filament qui sont parallèles ou faiblement inclinées par rapport à la demi-coupure à 15° typique d'un faisceau de croisement européen. C'est pourquoi l'on utilise ces zones pour réaliser une partie de faisceau située immédiatement au-dessous de cette demi-coupure inclinée, et qui définit cette dernière. Plus précisément, la position des images du filament engendrées par ces deux zones peut être corrigée pour qu'elles viennent se placer sensiblement au-dessous de la demi-coupure inclinée, de différentes manières :

    • utilisation de prismes inclinés sur la glace du projecteur au droit des zones 214, 226 pour remonter ces images le long de la demi-coupure ;
    • utilisation de prismes analogues, mais projetés directement sur la surface des zones 214, 226 ;
    • enfin modification de la position des foyers des génératrices horizontale et verticale de ces surfaces de manière à engendrer le même phénomène ; en particulier, on utilise avantageusement des génératrices horizontales paraboliques focalisées en des positions décalées latéralement par rapport au centre du filament, de manière à contrôler le déplacement des images le long de la demi-coupure inclinée.
    The characteristic of zones 214 and 226 is that, by their positioning, they generate images of the filament which are parallel or slightly inclined with respect to the half-cut at 15 ° typical of a European passing beam. This is why these zones are used to produce a part of the beam located immediately below this inclined half-cut, and which defines the latter. More precisely, the position of the filament images generated by these two zones can be corrected so that they come to be placed substantially below the inclined half-cut, in different ways:
    • use of prisms inclined on the lens of the projector at the right of zones 214, 226 to raise these images along the half-cut;
    • use of similar prisms, but projected directly onto the surface of zones 214, 226;
    • finally modification of the position of the focal points of the horizontal and vertical generators of these surfaces so as to generate the same phenomenon; in particular, it is advantageous to use horizontal parabolic generators focused in positions offset laterally relative to the center of the filament, so as to control the displacement of the images along the inclined half-cut.

    Les autres zones du miroir sont utilisées pour assurer une répartition lumineuse satisfaisante de la lumière dans les différentes zones du faisceau. Pour ce faire, on adapte au cas par cas les génératrices horizontales de ces zones, qui sont de préférence les mêmes pour la zone supérieure et pour la zone inférieure de manière à éviter des discontinuités susceptibles d'engendrer des défauts optiques. The other areas of the mirror are used to ensure a satisfactory light distribution of the light in the different areas of the beam. For this do, we adapt the generators on a case by case basis horizontal of these areas, which are preferably the same for the upper zone and for the lower zone so as to avoid discontinuities likely to cause optical defects.

    On observera ici que si les génératrices des différentes zones adjacentes se raccordent entre elles de façon continue (mais pas nécessairement de façon dérivable), alors la surface du miroir est également continue dans la mesure où la surface est engendrée en faisant glisser la génératrice verticale le long de la génératrice horizontale.It will be observed here that if the generatrices of different adjacent areas connect to each other continuously (but not necessarily so differentiable), then the surface of the mirror is also continues to the extent that the surface is generated in sliding the vertical generator along the horizontal generator.

    On observera en outre que, si les zones centrales 215, 225 présentent la génératrice verticale telle que décrite en référence à la figure 2, les autres zones peuvent éventuellement présenter, selon la fonction qui leur est attribuée, des surfaces de types différents, et notamment des surfaces dérivées des enseignements des documents FR-A-2 536 502, FR-A-2 536 503, FR-A-2 602 305, FR-A-2 602 306, FR-A-2 609 146, FR-A-2 609 148, FR-A-2 639 888, FR-A-2 664 677 et FR-A-2 710 393, au nom de la Demanderesse.It will also be observed that, if the central zones 215, 225 present the vertical generator such that described with reference to Figure 2, the other areas may possibly present, depending on the function which is assigned to them, surfaces of different types, and in particular surfaces derived from the teachings of documents FR-A-2 536 502, FR-A-2 536 503, FR-A-2 602 305, FR-A-2 602 306, FR-A-2 609 146, FR-A-2 609 148, FR-A-2 639 888, FR-A-2 664 677 and FR-A-2 710 393, on behalf of the Applicant.

    Par ailleurs, compte-tenu des caractéristiques propres aux miroirs selon l'invention, selon lesquelles le faisceau engendré présente une épaisseur réduite, il peut être utile que certaines zones, et de préférence des zones qui engendrent des images relativement grandes du filament, soient aptes à produire des images qui soient positionnées sensiblement plus bas que la coupure, ceci afin de combler un « trou noir » susceptible d'exister entre la partie de la route exposée au faisceau et le véhicule, un tel trou noir étant source d'inconfort visuel lorsqu'il est très marqué.Furthermore, given the characteristics specific to the mirrors according to the invention, according to which the generated beam has a reduced thickness, it may be useful as certain areas, and preferably areas that generate relatively large images of the filament, be able to produce images that are positioned significantly lower than the cut, this to fill a "black hole" that may exist between the part of the road exposed to the beam and the vehicle, such a black hole being a source of discomfort visual when very marked.

    Pratiquement, chacune des zones du miroir est définie en fonction d'au moins certains des paramètres suivants :

    • distance focale de base (paramètre F) de la génératrice verticale ;
    • défocalisation de cette même génératrice, c'est-à-dire utilisation d'un contour fictif, circulaire ou non, différent du contour réel de la source, pour engendrer cette génératrice ;
    • forme et courbure de la génératrice horizontale, et notamment décalage latéral de son axe comme indiqué plus haut ;
    • basculement de la surface (obtenue typiquement par changement de repère orthonormé) ;
    • emplacement de la surface dans le miroir qui détermine typiquement une focalisation de la génératrice horizontale sur un bord latéral ou l'autre du filament 10 ;
    • dimensions du filament 10.
    In practice, each of the areas of the mirror is defined as a function of at least some of the following parameters:
    • basic focal length (parameter F) of the vertical generator;
    • defocusing of the same generator, that is to say use of a fictitious contour, circular or not, different from the actual contour of the source, to generate this generator;
    • shape and curvature of the horizontal generator, and in particular lateral offset of its axis as indicated above;
    • tilting of the surface (typically obtained by changing the orthonormal reference frame);
    • location of the surface in the mirror which typically determines a focus of the horizontal generator on one side edge or the other of the filament 10;
    • filament dimensions 10.

    Selon une variante de réalisation de l'invention, on peut, pour certaines zones, construire la génératrice verticale non pas à partir du contour réel, typiquement circulaire, de la source, mais à partir d'un contour fictif, notamment un cercle, qui est plus grand (ou au contraire plus petit) que la section transversale effective du filament. Ceci permet d'influer sur le positionnement des images par rapport à la coupure, et notamment de réaliser une coupure moins nette, souhaitable dans certains cas. Par ailleurs, si l'on déplace certaines images vers le bas tandis que d'autres restent alignées sous la coupure, on peut ainsi épaissir le faisceau et/ou déplacer vers le bas sa zone de concentration maximale.According to an alternative embodiment of the invention, we can, for certain areas, build the generator vertical not from the actual contour, typically circular, from the source, but from a contour fictitious, including a circle, which is larger (or at opposite smaller) than the cross section effective filament. This allows to influence the positioning of the images in relation to the cut, and in particular to achieve a less clear cut, desirable in some cases. Furthermore, if we move some images down while others remain aligned under the cut, so we can thicken the beam and / or move its area down maximum concentration.

    Les figures 12 à 20 illustrent par des ensembles de courbes isocandela les parties de faisceau qui sont engendrées respectivement par les zones 214, 213, 212, 211, 216, 217, 218, 219 et 215 du miroir de la figure 11, tandis que les figures 21 et 22 illustrent l'allure obtenue en superposant respectivement les parties de faisceau des figures 12 à 15 et les parties de faisceau des figures 16 à 19.Figures 12 to 20 illustrate by sets of isocandela curves the beam parts that are generated respectively by zones 214, 213, 212, 211, 216, 217, 218, 219 and 215 of the mirror of FIG. 11, while Figures 21 and 22 illustrate the pace obtained by superimposing the parts of beam of figures 12 to 15 and the beam parts Figures 16 to 19.

    La figure 23 illustre l'allure de la partie de faisceau engendrée par la moitié supérieure du miroir de la figure 11, tandis que la figure 24 illustre l'allure de la partie de faisceau engendrée par sa moitié inférieure.Figure 23 illustrates the appearance of the beam generated by the upper half of the mirror Figure 11, while Figure 24 illustrates the pace of the beam part generated by its half lower.

    La figure 25 illustre l'allure du faisceau globalement obtenu. On observe qu'il s'agit d'un faisceau présentant toutes les qualités requises en termes de largeur, d'épaisseur et de concentration dans l'axe de la route.Figure 25 illustrates the beam pattern overall obtained. We observe that it is a beam having all the qualities required in terms of width, thickness and concentration in the axis of the road.

    La présente invention permet de réaliser, grâce au recours à une source transversale et aux génératrices verticales telles que décrites plus haut, des miroirs susceptibles d'engendrer par eux-mêmes, ou encore avec l'intervention d'éléments optiques sur la glace de fermeture, des projecteurs dont la largeur est sensiblement inférieure à la hauteur. Typiquement le rapport entre hauteur et largeur peut être compris entre 1,2:1 et 4:1.The present invention makes it possible, thanks to the use of a transverse source and generators verticals as described above, mirrors likely to generate by themselves, or with the intervention of optical elements on the ice of closure, projectors whose width is significantly lower than the height. Typically the ratio between height and width can be between 1.2: 1 and 4: 1.

    Bien entendu, la présente invention n'est nullement limitée aux formes de réalisation décrites ci-dessus et représentées sur les dessins, mais l'homme du métier saura y apporter toute variante ou modification conforme à son esprit.Of course, the present invention is by no means limited to the embodiments described above and shown in the drawings, but those skilled in the art will know how to make any conforming variant or modification to his mind.

    En particulier, bien que l'on ait décrit ci-dessus des miroirs présentant des bords latéraux verticaux et des bords supérieur et inférieur horizontaux, il est bien entendu que les enseignements ci-dessus s'appliquent également tout à fait bien à un miroir possédant des bords présentant une certaine obliquité.In particular, although we have described above mirrors with vertical side edges and horizontal top and bottom edges it's fine understood that the above teachings apply also quite well to a mirror with edges with a certain obliquity.

    En outre, comme on l'a indiqué, la génératrice horizontale du miroir peut être conçue pour effectuer ou non un étalement de la lumière en largeur.In addition, as noted, the generator horizontal of the mirror can be designed to perform or not a spread of light in width.

    Lorsque ce n'est pas le cas, cet étalement peut être réalisé par un striage de la glace. On peut également réaliser un étalement combiné par le miroir et par la glace.When this is not the case, this spreading can be achieved by ice streaking. We can also perform a combined spread by the mirror and by ice.

    Claims (15)

    Projecteur de véhicule automobile, comportant une source lumineuse (10), un miroir (20) et une glace, le miroir étant apte à coopérer avec la source pour engendrer un faisceau délimité par une coupure dont au moins une partie s'étend horizontalement, caractérisé en ce que la source présente la forme générale d'un cylindre dont l'axe est essentiellement horizontal et perpendiculaire à un axe optique (y-y) du miroir, et dont la longueur selon cet axe est sensiblement inférieure à la largeur du miroir, et en ce qu'au moins une section verticale (20h, 20b) de la surface du miroir présente un profil tel qu'un rayon lumineux (D1) émis tangentiellement par un bord de la source est réfléchi (D2) parallèlement audit axe optique, les rayons lumineux émis par le reste de la source étant réfléchis avec une inclinaison vers le bas par rapport audit axe optique.Motor vehicle headlamp, comprising a light source (10), a mirror (20) and a lens, the mirror being able to cooperate with the source for generate a beam delimited by a cut whose at least one part extends horizontally, characterized in that the source has the general shape of a cylinder whose axis is essentially horizontal and perpendicular to an optical axis (y-y) of the mirror, and whose the length along this axis is significantly less than the width of the mirror, and in that at least one section vertical (20h, 20b) of the mirror surface has a profile such as a light ray (D1) emitted tangentially by an edge of the source is reflected (D2) parallel to said optical axis, the light rays emitted by the rest of the source being reflected with a tilting downward relative to said optical axis. Projecteur selon la revendication 1, caractérisé en ce que le miroir (20) présente une hauteur au moins égale à sa largeur.Projector according to claim 1, characterized in that the mirror (20) has a height at least equal to its width. Projecteur selon la revendication 2, caractérisé en ce que le rapport entre la hauteur et la largeur du miroir (20) est compris entre 1,2:1 et 4:1.Projector according to claim 2, characterized in that the ratio between the height and the width of the mirror (20) is between 1.2: 1 and 4: 1. Projecteur selon l'une des revendications 1 à 3, caractérisé en ce qu'au moins une zone de la surface réfléchissante du miroir est engendrée par déplacement de ladite section verticale le long d'une génératrice horizontale donnée constituée par une partie, correspondant à ladite zone, d'une section horizontale du miroir à la hauteur de la source.Projector according to one of claims 1 to 3, characterized in that at least one area of the surface reflective of the mirror is generated by displacement of said vertical section along a generator given horizontal formed by a part, corresponding to said area, of a horizontal section of the mirror at the height of the source. Projecteur selon la revendication 4, caractérisé en ce que le déplacement de ladite section verticale est une translation sans rotation.Projector according to claim 4, characterized in that the displacement of said section vertical is a translation without rotation. Projecteur selon l'une des revendications 4 et 5, caractérisé en ce que ladite génératrice horizontale est lisse.Projector according to one of claims 4 and 5, characterized in that said generator horizontal is smooth. Projecteur selon l'une des revendications 4 et 5, caractérisé en ce que ladite génératrice horizontale présentent des ruptures de pente.Projector according to one of claims 4 and 5, characterized in that said generator horizontal show slope breaks. Projecteur selon l'une des revendications 6 et 7, caractérisé en ce que ladite génératrice horizontale possède au moins localement la forme d'un morceau de parabole.Projector according to one of claims 6 and 7, characterized in that said generator horizontal has at least locally the shape of a piece of satellite dish. Projecteur selon l'une des revendications 6 à 8, caractérisé en ce que ladite génératrice horizontale possède au moins localement la forme d'une droite.Projector according to one of claims 6 to 8, characterized in that said horizontal generator at least locally has the shape of a straight line. Projecteur selon l'une des revendications 1 à 9, caractérisé en ce que le miroir est subdivisé en une pluralité de zones (211-219, 221-229) dont au moins une (215, 225) présente ladite section verticale.Projector according to one of claims 1 to 9, characterized in that the mirror is subdivided into a plurality of zones (211-219, 221-229) of which at least one (215, 225) has said vertical section. Projecteur selon la revendication 10, caractérisé en ce qu'au moins l'une des zones du miroir possède une section verticale qui présente un profil tel qu'un rayon lumineux fictif (D1) émis tangentiellement par un contour fictif est réfléchi (D2) parallèlement audit axe optique, les rayons lumineux fictifs émis par le reste du contour étant réfléchis avec une inclinaison vers le bas par rapport audit axe optique.Projector according to claim 10, characterized in that at least one of the areas of the mirror has a vertical section which has such a profile that a fictitious light ray (D1) emitted tangentially by a fictitious contour is reflected (D2) parallel said optical axis, the fictitious light rays emitted by the rest of the outline being reflected with an inclination down relative to said optical axis. Projecteur selon la revendication 11, caractérisé en ce que ledit contour fictif est un cylindre de diamètre différent de celui de ladite source.Projector according to claim 11, characterized in that said fictitious contour is a cylinder of diameter different from that of said source. Projecteur selon la revendication 12, caractérisé en ce que ledit contour fictif englobe ladite source.Projector according to claim 12, characterized in that said fictitious contour includes said source. Projecteur selon l'une des revendications 1 à 13, caractérisé en ce que ladite source (10) est constituée par un filament incandescent.Projector according to one of claims 1 to 13, characterized in that said source (10) is consisting of an incandescent filament. Projecteur selon l'une des revendications 1 à 14, caractérisé en ce que le miroir possède à la hauteur de la source une section horizontale propre à assurer une répartition horizontale prédéterminée de la lumière.Projector according to one of claims 1 to 14, characterized in that the mirror has the height from the source a horizontal section suitable for ensuring predetermined horizontal light distribution.
    EP99400178A 1998-01-28 1999-01-26 Vehicle headlight comprising a transversal source and able to generate a sharp dark-light cut-off Expired - Lifetime EP0933585B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9800905 1998-01-28
    FR9800905A FR2774150B1 (en) 1998-01-28 1998-01-28 CROSS-SOURCE PROJECTOR FOR A MOTOR VEHICLE, LIKELY TO TRANSMIT A BEAM WITH A CLEAR CUT

    Publications (2)

    Publication Number Publication Date
    EP0933585A1 true EP0933585A1 (en) 1999-08-04
    EP0933585B1 EP0933585B1 (en) 2008-01-09

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99400178A Expired - Lifetime EP0933585B1 (en) 1998-01-28 1999-01-26 Vehicle headlight comprising a transversal source and able to generate a sharp dark-light cut-off

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    US (1) US6142658A (en)
    EP (1) EP0933585B1 (en)
    JP (1) JPH11265602A (en)
    DE (1) DE69937917T2 (en)
    ES (1) ES2300133T3 (en)
    FR (1) FR2774150B1 (en)

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    FR2849159A1 (en) 2002-12-24 2004-06-25 Valeo Vision Luminous projector for vehicle, has vertical reflector held at side of opening opposite to major portion of ellipsoidal reflector to produce long range rays that is not intercepted by lens
    EP1491816A1 (en) 2003-06-27 2004-12-29 Valeo Vision Vehicle headlamp comprising a reflector and an optical deflection element
    EP1538393A1 (en) * 2003-12-05 2005-06-08 Valeo Vision Vehicle headlight with vertical orientation
    FR2865021A1 (en) * 2004-01-13 2005-07-15 Valeo Vision Headlight for motor vehicle, has light source with axis that is parallel to or oblique with respect to optical axis of verticalized reflector, where reflector cooperates with source for generating light beam
    FR2877421A1 (en) 2004-11-04 2006-05-05 Valeo Vision Sa LUMINOUS PROJECTOR FOR MOTOR VEHICLE, GIVING A CUT-OFF BEAM
    EP1686310A1 (en) 2005-02-01 2006-08-02 Valeo Vision Vertically oriented vehicle headlamp

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    FR2793000B1 (en) * 1999-04-29 2001-08-03 Valeo Vision SINGLE SOURCE, FIXED OPTICAL BI-FUNCTION PROJECTOR FOR MOTOR VEHICLE
    FR2804495B1 (en) 2000-01-31 2002-06-07 Valeo Vision MOTOR VEHICLE HEADLIGHT, INCLUDING A CROSS-SECTIONAL SOURCE, AND CAPABLE OF GENERATING A BEAM WITH NON-RECTILLINE CUT
    FR2808867B1 (en) 2000-05-11 2002-08-23 Valeo Vision BI-FUNCTIONAL PROJECTOR WITH SINGLE LIGHT SOURCE AND MOBILE OCCULTER FOR MOTOR VEHICLE
    US6663570B2 (en) * 2002-02-27 2003-12-16 Volcano Therapeutics, Inc. Connector for interfacing intravascular sensors to a physiology monitor
    FR2883359B1 (en) * 2005-03-15 2007-05-11 Valeo Vision Sa LUMINOUS PROJECTOR FOR A MOTOR VEHICLE WITH LOW DIMENSIONS
    DE102006004058B4 (en) * 2006-01-28 2019-10-24 Automotive Lighting Reutlingen Gmbh Lighting device for a vehicle and method and tool for producing the same
    JP5771887B2 (en) * 2011-01-25 2015-09-02 スタンレー電気株式会社 Fog lights

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    Publication number Priority date Publication date Assignee Title
    FR2849159A1 (en) 2002-12-24 2004-06-25 Valeo Vision Luminous projector for vehicle, has vertical reflector held at side of opening opposite to major portion of ellipsoidal reflector to produce long range rays that is not intercepted by lens
    EP1433999A1 (en) 2002-12-24 2004-06-30 Valeo Vision Motor vehicle headlamp with a transverse light source
    US7125150B2 (en) 2002-12-24 2006-10-24 Valeo Vision Projector with transverse light source for automotive vehicle
    EP1491816A1 (en) 2003-06-27 2004-12-29 Valeo Vision Vehicle headlamp comprising a reflector and an optical deflection element
    EP2009347A1 (en) 2003-06-27 2008-12-31 Valeo Vision Headlight for automobile comprising a reflector and an optical deviation element
    EP1538393A1 (en) * 2003-12-05 2005-06-08 Valeo Vision Vehicle headlight with vertical orientation
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    FR2877421A1 (en) 2004-11-04 2006-05-05 Valeo Vision Sa LUMINOUS PROJECTOR FOR MOTOR VEHICLE, GIVING A CUT-OFF BEAM
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    US7364334B2 (en) 2004-11-04 2008-04-29 Valeo Vision Headlight for a motor vehicle giving a cutoff beam
    EP1686310A1 (en) 2005-02-01 2006-08-02 Valeo Vision Vertically oriented vehicle headlamp

    Also Published As

    Publication number Publication date
    JPH11265602A (en) 1999-09-28
    FR2774150B1 (en) 2000-04-14
    FR2774150A1 (en) 1999-07-30
    DE69937917T2 (en) 2009-01-02
    DE69937917D1 (en) 2008-02-21
    US6142658A (en) 2000-11-07
    EP0933585B1 (en) 2008-01-09
    ES2300133T3 (en) 2008-06-01

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