EP2472176A2 - Beleuchtungs- und/oder Signalisierungsvorrichtung, insbesondere für Kraftfahrzeug - Google Patents

Beleuchtungs- und/oder Signalisierungsvorrichtung, insbesondere für Kraftfahrzeug Download PDF

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Publication number
EP2472176A2
EP2472176A2 EP11193279A EP11193279A EP2472176A2 EP 2472176 A2 EP2472176 A2 EP 2472176A2 EP 11193279 A EP11193279 A EP 11193279A EP 11193279 A EP11193279 A EP 11193279A EP 2472176 A2 EP2472176 A2 EP 2472176A2
Authority
EP
European Patent Office
Prior art keywords
branch
cutoff
elementary
cut
angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11193279A
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English (en)
French (fr)
Other versions
EP2472176A3 (de
EP2472176B1 (de
Inventor
Pierre Albou
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP2472176A2 publication Critical patent/EP2472176A2/de
Publication of EP2472176A3 publication Critical patent/EP2472176A3/de
Application granted granted Critical
Publication of EP2472176B1 publication Critical patent/EP2472176B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/12—Combinations of only three kinds of elements
    • 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
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • F21W2102/16—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having blurred cut-off lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting device and / or signaling, including motor vehicle.
  • such a lighting and / or signaling device may be in the form of a motor vehicle light projector, for the purpose of producing for example a coded beam.
  • a coded beam For such an application, it will be understood that in order to avoid dazzling a motorist arriving in front, it is essential that the projection on the road of the light beam generated by the lighting and / or signaling device does not exceed one predetermined limit.
  • An already known lighting and / or signaling device is arranged to produce a wide light beam which has a cutoff (namely the transition between a zone illuminated by the beam and a zone not illuminated by said beam, these zones being disposed of both sides of the cut, this transition being realized on a small extent) at once flat and clear.
  • this type of device has a technical limitation in that the cut becomes blurred (fuzzy cut means a light transition between the illuminated area and the unlit area which is carried out over a larger area than the extent of a sharp cut) at the edges, which is undesirable for use on a motor vehicle.
  • blurred means a light transition between the illuminated area and the unlit area which is carried out over a larger area than the extent of a sharp cut
  • the flat cutoff portion of the second elementary beam is found in the first elementary beam and, as this flat cutoff portion is sharp, it is visible even while being embedded in the first elementary beam. This is also not desirable for reasons of homogeneity of the overall beam.
  • the object of the present invention is therefore to provide a lighting and / or signaling device which produces a cut-off light beam whose forward projection (particularly on a screen perpendicular to the optical axis of said device) has a sufficiently sharp delineation and that does not overflow the rest of the road, so that motorists arriving in front are not dazzled, while ensuring that the light intensity distribution of the beam thus produced is otherwise homogeneous.
  • Another object of the present invention is to provide a lighting and / or signaling device whose design and implementation are both simple and economical.
  • a "blur" is generated at the level of the cutoff branch of the first elementary beam, this blur being concealed in the second elementary beam, so that the homogeneity of the overall beam is not disrupted.
  • the second elementary beam has a cutoff comprising at least one clean branch, which net branch is substantially coincident, over at least a part of its length, with the net branch of the cutoff of the first elementary beam.
  • the cutoff of the second elementary beam may comprise two branches forming between them a non-zero angle, preferably an angle substantially equal to 15 °, said branches being sharp.
  • the second elementary beam has a cutoff comprising a first net branch and a second fuzzy branch, the net branches of the first and second elementary beams forming between them a non-zero angle, the fuzzy branch of the cutoff.
  • one of said elementary beams being at least partially included in the other of the beams.
  • the optical return elements consist of non-imaging optical elements.
  • the optical return element consists of an imaging optical element such as a lens.
  • the cutting edge of the folder has, on the side intended to produce the first branch, a main portion, the end of which is in the extension of the side of the cutting edge intended to produce the second branch, and a peripheral portion. , whose end is with said portion an angle corresponding to the angle of inclination of said first branch.
  • this part of the device capable of producing the first elementary beam is rotated by a rotation angle of opposite sign and absolute value substantially equal to the angle of inclination of the first branch.
  • the projection on a screen perpendicular to the optical axis of the cutoff of the second elementary beam is wider than the projection on the same screen of the cutoff of the first elementary beam.
  • the scheme of the figure 1 corresponds to a code beam produced by a lighting device of the prior art, as described for example in the document US 6,966,675 .
  • This device which has an optical axis Z-Z ', produces a light beam whose projection on a screen (XX'; Y-Y ') perpendicular to the optical axis ZZ' of the device has a cutoff edge in V, this cutting edge having a first branch, located on one side of the screen and which is parallel to the horizontal XX ', and a second branch, on the other side of the screen and which rises to above the horizontal XX 'of a non-zero angle, approximately equal to 15 °.
  • the coded beam produced by this prior art lighting device comprises a central portion 1 with more intense lighting limited by a cutting edge 2 V whose first branch 2A is substantially horizontal, that is to say -dire confused with the axis XX 'of the horizontal plane, and the second branch 2B rises at an angle ⁇ relative to the horizontal, that is to say above this axis XX' of the horizontal plane.
  • the coded beam further comprises a wider portion 3, which overflows on the right and the left of the central portion 1.
  • the wide portion 3 has a horizontal flat cut 4, located at the same level as the first branch 2A (horizontal) of the cut 2 in V.
  • the lighting in part 3 is less intense than in part 1, but sufficient to illuminate the side areas.
  • the cutoff 2 in V of the central portion 1 of the light beam produced by this type of lighting device has the disadvantage of being fuzzy when one moves away laterally from the optical axis, because of the presence of geometric aberrations. These fuzzy areas are represented on the figure 1 for the two branches 2A and 2B of the cutoff 2, respectively at 5A and 5B. Due to this blur, a luminous flux rises beyond the cutoff edge 2 in V, which may dazzle at least partially motorists arriving in front of the vehicle equipped with this device.
  • the invention proposes to eliminate these fuzzy areas at the cutoff edge 2 of the beam produced by the lighting and / or signaling device.
  • the orthogonal projection on a vertical plane of such a beam, produced by a lighting and / or signaling device according to the invention, is represented on the figure 2 .
  • This beam comprises a cutting edge 2 in V whose first branch 2A (left on the figure 2 ) is substantially horizontal and whose second branch 2B (to the right on the figure 2 ) rises at an angle of about 15 ° to the horizontal, these two branches being sharp.
  • the portion 6 located under the second branch 2B is blurred.
  • the value of this angle ⁇ is not limiting and can generally be between 10 ° and 60 °.
  • a first part of the lighting device and / or signaling is schematically represented on the figures 3 and 4 .
  • This first part M comprises a light source S, constituted for example by at least one incandescent lamp, a Xenon lamp or advantageously by at least one light emitting diode, comprising planar emitters which are located on one and the same plane support in order to facilitate the manufacture of the lighting device and have only one radiator.
  • This source S is arranged to illuminate forwards and upwards.
  • the terms "front” and “rear” are to be understood by considering the normal direction of forward movement of the vehicle equipped with the first part M of the lighting device according to the invention.
  • a collector mirror R1 is disposed in front of the source S and is turned towards the rear.
  • This mirror R1 comprises a first focus F1 at which (or in the vicinity of) is disposed the center of the source S which illuminates towards the mirror R1, and a second focus F2 located on the optical axis ZZ 'of the first part M of the device.
  • This first part M also comprises a folder P, whose upper edge P2 constitutes the cutting edge of the beam and passes through the (or in the vicinity of) second focus F2 collector mirror R1.
  • a reflection mirror R2 is located essentially below the collector mirror R1.
  • the reflective surface of the mirror R2 is turned forward to produce the cutoff output beam.
  • the reflecting mirror R2 has a focus coincident with the (or near the) second focus F2 of the collector mirror R1.
  • the optical axis of the mirror R2 coincides with the optical axis Z-Z 'of the device.
  • the edge of the cut P2 of the folder P also passes through the focus of the mirror R2 (or in its vicinity).
  • An ice (not shown), of transparent material, can be arranged in front of the elements of the first part M of the lighting device.
  • the surfaces of the collector mirror R1, the folder P and the deflection mirror R2 are conjugate surfaces.
  • This conjugation may consist in that the collection mirror R1 is designed to transform a spherical wave surface from the center of the source S into an arbitrary wave surface that is reduced to a two-dimensional line P1-P2-P3 .
  • the collection mirror R1 is designed to transform a spherical wave surface from the center of the source S into an arbitrary wave surface that is reduced to a two-dimensional line P1-P2-P3 .
  • the line P1-P2-P3 is then in an arc.
  • This solution allows an analytical calculation and offers a parameter that facilitates the horizontal spread corresponding to the major radius of the torus.
  • the reflecting mirror R2 is determined to transform this wave surface toric in a cylindrical wave surface of vertical axis admitting any curve for cross section.
  • This curve which characterizes the wave emerging from the first part M of the device, is chosen so as to compensate at least in part the horizontal inclination of the plane of the source S with respect to the axis ZZ 'of the vehicle, and makes it possible to adjust the horizontal spreading of the beam.
  • This first part M thus makes it possible to create a wide outgoing beam with a clean cut-off line by using the folder with the cutting edge P1-P2-P3, despite the horizontal inclination of the source S.
  • a first side of the folder P1 (right on the figure 3 ) is substantially rectilinear or of slight curvature, while the second side (left on the figure 3 ) has a first portion P2, close to the center and which extends the right side P1, and finally a zone P4 (or cutting edge portion) which forms a determined angle of inclination with the extension P3 (immaterial) portions P1 and P2, for example 15 °.
  • the width D of the portion P2 is chosen as small as possible so that the rays passing below the cutoff portion P4 are not returned to the opposite side of the axis ZZ 'to infinity. To determine the value of this width, it is possible to calculate the normal at any point of the collecting reflector by exploiting the following property: a ray coming from the center of the source S and reaching a point of the collector R1 is returned towards the point of the Folder edge P such that the plane normal to the edge of folder in this second point contains the first point.
  • the normal to the collector R1 at the first point is the bisector of the line connecting the first and the second point and of the line passing through the first point and the center of the source S.
  • the abscissae such as the infinite ends of the largest images and the central directions at the ends of these images at the edge of the folder are on the same side (left or right) of the vertical plane containing the optical axis as the point of the Bending edge considered are those for which the folder can be cut to raise light without creating glare.
  • FIGS 4A and 4B which respectively represent sectional views of the first part M of the device along the axes ZZ 'and B-B', which respectively correspond to portions PA and PB of the folder P, one can see different possible cases for the paths of the light rays.
  • the Figure 4A represents the first part M of the device in a section at the portion PA of the cutting edge of the folder P, this portion PA being located at the portions P1 and P2.
  • the ray i1 coming from a point of the source situated above its center (and thus from the first focus F1 of the mirror R1, itself located at the center of the source S), is reflected along a ray that strikes the PA folder above its lower edge, and thus above the F2 fireplace. This ray is then reflected along a ray which is itself reflected by the mirror R2 according to a descending ray.
  • the Figure 4B represents the first part M of the device in a section at the portion PB of the cutting edge of the folder P, this portion PB being located at the portion P3, itself located in the inclination of the cutting edge of the folder P of an angle ⁇ .
  • This portion PB is distinguished in particular from the portion PA (represented in dashed lines on the Figure 4B ) by a different length and possibly by an angle of inclination relative to the mirror R1 different, for example lower.
  • the radius i4 coming from the same point as the radius i1 of the Figure 4A , is reflected along a radius which, instead of striking the folder PB above its lower edge as the radius i1, tangents said lower edge of the folder PB, without being deflected and is reflected by the mirror R2 following a ascending ray, which corresponds to the cutting edge 11A of the beam 10 thus produced, which rises above the horizontal.
  • the rays i5 and i6 respectively emitted from the same points as the rays i2 and i3 of the Figure 4A (ie respectively from the center of the source S and a point of the source S situated below its center), are reflected by the mirror R1 according to rays which pass below the lower edge of the PA folder. These rays are then reflected by the mirror R2 in radii respectively horizontal and downward.
  • This elementary beam 10 comprises a cutting edge of which a first branch 11A rises by an angle - ⁇ relative to the horizontal and a second branch 11 B substantially horizontal. Furthermore, the area under the branch 11A is blurred when one moves away from the optical axis Z-Z '.
  • the first branch 21A furnishes below it a fuzzy area 22 located completely below the horizontal.
  • the second branch 21B provides a zone 23 beneath it for at least partially containing another elementary light beam (the beam 30 of the figure 7 described below).
  • This beam 20 of the figure 6 superimposed on a flat-cut beam 30 such as that of the figure 7 , the cut 31 has two branches parallel to the horizontal axis, a first branch 31A (left on the figure 7 ) being clean and the second branch 31 B (right on the figure 7 ) being fuzzy, makes it possible to obtain the resulting beam 40 of the figure 8 .
  • the second part of the lighting and / or signaling device according to the invention which makes it possible to obtain the flat-cut elementary beam 30 intended to be superposed on the elementary beam produced by the first part M of this same device, is a type of module known to those skilled in the art.
  • one way to achieve this second part is to use the same system as the first part M which produces the elementary beam 20, but by reversing left and right and not turning a given angle around the optical axis Z-Z '.
  • the resulting beam 40 of the figure 8 has a cutoff 41 whose two branches 41A and 41B are sharp, while the beam portions 42 and 43, respectively located under the branches 41A and 41B, are blurred.
  • the two parts of the device (the first part M of figures 4 and 5 , and the second part that produces the beam of the figure 7 ) which made it possible to obtain the beam of the figure 8 may not consist of any imaging optical element.
  • these two parts may be symmetrical to each other, the first part being rotated by a certain angle with respect to the optical axis ZZ 'of the device and not the second part.
  • a similar result can be obtained by using a projection optical system such as a non-imaging lens. More specifically, as illustrated on the figure 9 , it is possible to realize the first part M of the lighting device and / or signaling according to the invention from a concave reflector R1, a light source (not shown) disposed in the concavity of the reflector R1 to illuminate, and a lens L located in front of the reflector R1 and the light source.
  • a projection optical system such as a non-imaging lens.
  • the reflector R1 is associated with a folder P, the upper surface of which is reflective for folding the beam coming from the reflector, and has a front end edge of its own to form the cut in the beam produced, this folder P being capable of presenting, for example, a form similar to the folder described above and shown in figures 3 and 4 .
  • the lens L is also determined to give a point of the edge of the folder P, for all the rays contained in the plane perpendicular to the front edge of said folder P at the point considered, an image to the infinite in this plane.
  • the device whose first V-cut part would produce a beam some of which would go up to the right of the optical axis, without exceeding the V cut. , and that would not be turned around its optical axis.
  • the value of the 75R photometric value defined at a screen perpendicular to the optical axis of the device and located 25 meters from the device, at a point on this screen at 25 centimeters below and 50 centimeters to the right of the optical axis
  • 75R photometric value defined at a screen perpendicular to the optical axis of the device and located 25 meters from the device, at a point on this screen at 25 centimeters below and 50 centimeters to the right of the optical axis
  • Such a V-cut module may for example produce a beam as shown in FIG. figure 10 , whose central part 50 has a cutting edge 51 which comprises, on one side (on the right on the figure 10 ), a branch 51 B, net, which rises by an angle ⁇ substantially equal to 15 ° above the horizontal, and, on the other side (left on the figure 10 ), a branch 51 A, also clean and horizontal.
  • This beam 50 superimposed on a flat-cut beam 30 such as that of the figure 7 , makes it possible to obtain the resulting beam 60 of the figure 11 , which has a break 61 whose two branches 61A and 61B are sharp, while the beam portion 62, located under the branch 61 B, is blurred.
EP11193279.4A 2011-01-03 2011-12-13 Beleuchtungs- und/oder signalisierungsvorrichtung, insbesondere für kraftfahrzeug Active EP2472176B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1150008A FR2970061B1 (fr) 2011-01-03 2011-01-03 Dispositif d'eclairage et/ou de signalisation, notamment pour vehicule automobile

Publications (3)

Publication Number Publication Date
EP2472176A2 true EP2472176A2 (de) 2012-07-04
EP2472176A3 EP2472176A3 (de) 2017-10-04
EP2472176B1 EP2472176B1 (de) 2023-11-22

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FR (1) FR2970061B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104100899A (zh) * 2013-04-08 2014-10-15 现代摩比斯株式会社 体现截止线的多阵列led芯片及其头灯
WO2016096234A1 (de) * 2014-12-19 2016-06-23 Osram Gmbh Beleuchtungseinrichtung
EP3246204A1 (de) * 2016-05-17 2017-11-22 Stanley Electric Co., Ltd. Fahrzeuglampe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6966675B2 (en) 2002-12-20 2005-11-22 Valeo Vision Lighting module for a vehicle headlight

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4080780B2 (ja) * 2002-04-23 2008-04-23 株式会社小糸製作所 光源ユニット
JP4966756B2 (ja) * 2007-06-15 2012-07-04 スタンレー電気株式会社 ロービーム用プロジェクタ型車両用灯具
JP5524470B2 (ja) * 2008-11-12 2014-06-18 株式会社小糸製作所 車両用灯具ユニット及び車両用灯具
JP5544676B2 (ja) * 2009-06-04 2014-07-09 スタンレー電気株式会社 車両用前照灯

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6966675B2 (en) 2002-12-20 2005-11-22 Valeo Vision Lighting module for a vehicle headlight

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104100899A (zh) * 2013-04-08 2014-10-15 现代摩比斯株式会社 体现截止线的多阵列led芯片及其头灯
CN104100899B (zh) * 2013-04-08 2017-09-26 现代摩比斯株式会社 体现截止线的多阵列led芯片及其头灯
WO2016096234A1 (de) * 2014-12-19 2016-06-23 Osram Gmbh Beleuchtungseinrichtung
EP3246204A1 (de) * 2016-05-17 2017-11-22 Stanley Electric Co., Ltd. Fahrzeuglampe
US10464470B2 (en) 2016-05-17 2019-11-05 Stanley Electric Co., Ltd. Vehicle lamp

Also Published As

Publication number Publication date
EP2472176A3 (de) 2017-10-04
FR2970061B1 (fr) 2020-03-06
EP2472176B1 (de) 2023-11-22
FR2970061A1 (fr) 2012-07-06

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