EP2489925A1 - Optische Einheit für Vorrichtung zur Signalisierung und/oder Beleuchtung - Google Patents

Optische Einheit für Vorrichtung zur Signalisierung und/oder Beleuchtung Download PDF

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Publication number
EP2489925A1
EP2489925A1 EP12155491A EP12155491A EP2489925A1 EP 2489925 A1 EP2489925 A1 EP 2489925A1 EP 12155491 A EP12155491 A EP 12155491A EP 12155491 A EP12155491 A EP 12155491A EP 2489925 A1 EP2489925 A1 EP 2489925A1
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EP
European Patent Office
Prior art keywords
lens
light
unit
complementary
unit according
Prior art date
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Granted
Application number
EP12155491A
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English (en)
French (fr)
Other versions
EP2489925B1 (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
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Valeo Vision SAS
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Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP2489925A1 publication Critical patent/EP2489925A1/de
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Publication of EP2489925B1 publication Critical patent/EP2489925B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • 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
    • 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
    • F21S41/10—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]
    • F21S41/155—Surface emitters, e.g. organic light emitting diodes [OLED]
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures

Definitions

  • the invention relates in particular to an optical unit, in particular for a signaling and / or lighting device for a motor vehicle.
  • the present invention aims in particular to avoid this type of disadvantage.
  • Isotropic source means a source whose intensity is independent of the angle of observation, within the solid angle containing all its rays.
  • a Lambertian source for its part, has a luminance independent of the point considered on the surface of the emitter and the angle of observation inside the solid angle containing all rays.
  • the image focus of the corrugated lens is preferably at infinity.
  • the invention makes it possible, thanks to the appropriate corrugated surface of the lens, to obtain a beam, in particular a complementary, relatively thin and spreading free-form motorway beam, which is not in the form of a "banana” and which, in overlap with a beam code, gives a satisfactory luminous homogeneity.
  • the lens has a basic geometrical surface, which surface is fictitious, corresponding in particular to an exit face of a rigorously stigmatic lens.
  • the corrugated face of the lens comprises corrugations of variable slope, this slope being measured with respect to the geometrical base surface, this slope preferably being all the greater as the undulation is removed from a center of the lens. , so as to produce a single maximum illumination zone in the complementary beam, and no secondary maxima zones.
  • the invention thus makes it possible to avoid the appearance, in the complementary bundle, of distinct light spots (which may cause discomfort for the driver of the vehicle). This makes this complementary beam relatively homogeneous.
  • the optical unit has an optical axis, and each undulation is formed on a strip, this strip preferably extending substantially rectilinearly when the lens is observed along the axis. optical.
  • the corrugations are substantially parallel to each other.
  • the amplitude of the corrugations is increasing as the considered wave is removed from the center of the lens.
  • This amplitude is preferably measured with respect to the basic geometrical surface (which is fictitious) of the lens.
  • the lens is arranged to give a point of light point located at its object focus, a substantially horizontal light line when the corrugations of the lens are placed substantially vertically.
  • the lens is made in one piece.
  • the wavy face of the lens is arranged as the exit face of the light.
  • the light source comprises a LED (light-emitting diode) with a plane light emitter, the plane of this emitter advantageously extending in an inclined manner with respect to the optical axis.
  • the plane of the transmitter is neither perpendicular nor parallel to the optical axis.
  • the object focus of the lens is placed substantially in the center of a lower edge of the emitter of the light source.
  • the lens has a substantially circular periphery, or rectangular or trapezoidal, when it is observed along the optical axis.
  • the optical unit has a top and a bottom when in place on the vehicle.
  • This unit may further comprise a reflector placed in the unit, in order to intercept at least a portion of the light rays from the light source so as to create an upwardly defocused image, which image, projected and spread through the lens, completes the complementary beam downwards.
  • a reflector placed in the unit, in order to intercept at least a portion of the light rays from the light source so as to create an upwardly defocused image, which image, projected and spread through the lens, completes the complementary beam downwards.
  • the optical unit has an axis transverse to the optical axis and extending substantially horizontally when the unit is mounted on the vehicle, and the reflector has a substantially sectoral shape. of cylinder of transverse axis.
  • the reflector comprises a front edge located between the lens and the light source.
  • the motorway beam has a horizontal cutoff located between a horizontal plane and an inclined plane of 0.57 ° downwards to the left or right of the optical axis, depending on the type of traffic (left or right traffic, respectively). ).
  • This cutoff line is preferably located in a plane inclined 0.29 ° downwards.
  • This motorway beam may, in particular, have a maximum intensity higher than 80% than a conventional code using a source of the same nature.
  • the device is arranged so that the complementary beam is lit only when the vehicle is traveling at a speed greater than a predetermined threshold (non-zero), this threshold being for example substantially equal to 110 km / h.
  • a predetermined threshold non-zero
  • the device according to the invention can be unconditionally activated on the highway.
  • an optical unit 1 for a motor vehicle lighting device D arranged to produce a complementary light beam FC intended to be used with a main light beam produced by another optical unit 30, this complementary beam FC having a cutoff C substantially flat (see cut C on the Figures 5 and 8 ).
  • the optical unit 30 may optionally be LED.
  • the complementary beam FC may be a complementary, relatively thin and spreading free-form motorway beam, which is not in the form of a "banana", and the main beam may be a code beam.
  • the device in a variant not illustrated, it is possible to arrange the device to enable it to produce a bad weather beam, for example class W.
  • the cut C is formed by lateral edges BL which are straightened, namely substantially parallel to a horizontal line, and not falling relative to this horizontal line.
  • the corrugated face 4 of the lens 3 comprises corrugations 5 of variable slope, this slope being measured relative to the basic geometric surface SB, this slope being all the greater as the corrugation 5 is moved away from a center CO of the lens, so as to produce a single zone of maximum illumination ZMax in the complementary beam FC (see FIG. Figures 5 and 8 ).
  • the invention thus makes it possible to avoid the appearance, in the complementary bundle FC, of several local illumination maxima and thus of distinct light tasks (which may cause discomfort for the driver of the vehicle).
  • the invention thus makes it possible to make this complementary bundle FC relatively homogeneous.
  • the optical unit has an optical axis Ox (see figure 6 ), and each undulation 5 is formed on a strip 7 of the lens 3, each strip 7 extending substantially rectilinearly when the lens 3 is observed along the optical axis Ox.
  • the corrugations 5 are substantially parallel to each other.
  • the amplitude of the corrugations 5 is increasing as the undulation considered is remote from the center CO of the lens 3.
  • This amplitude is preferably measured with respect to the base geometrical surface SB (which is fictitious) of the lens 3.
  • the lens 3 is arranged to give, from a point light point located at its object focus F, a substantially horizontal light line when the corrugations of the lens are placed substantially vertically.
  • the corrugated face 4 of the lens 3 is arranged in the unit 1 as the exit face of the light.
  • the other face 9 of the lens 3, opposite the face 4, is for example flat. This notably makes it possible to reduce the aberrations substantially.
  • H is the angle of an observation direction of the beam with a vertical plane containing the optical axis.
  • M [X, Y, Z] F (u, v) be a parametric equation of the exit surface 4 of the basic stigmatic lens (an equation that can be established by those skilled in the art for a draw, a face input and a given material, in the following example the draft is 70 mm, the input face is flat and the material is PMMA).
  • the modulation function ⁇ x is then such that the deviations are greater on the side corresponding to the zones of the lens 3 furthest away from the axis (and thus receiving less flux).
  • the LED 2 has a plane light emitter 10, the plane of this emitter 10 extending inclined with respect to the optical axis Ox, as can be seen in FIG. figure 6 .
  • the plane of the emitter 10 is neither perpendicular nor parallel to the optical axis.
  • the object focus F of the lens 3 is placed substantially in the center of a lower edge 11 of the emitter 10 of the light source 2.
  • the lens 3 has a substantially circular periphery 12.
  • the optical unit has a top and a bottom when in place on the vehicle.
  • the rear edge 21 of the reflector 15 defines with the upper edge of the transmitter 10 a non-zero distance d, which in the example described, depends on the encapsulation of the LED. This distance d is characteristic of the zone of the emitter 10 which is hidden vis-à-vis the reflector 15.
  • the optical unit 1 has an axis Oy transverse to the optical axis Ox and extending substantially horizontally when the unit 1 is mounted on the vehicle.
  • the reflector 15 has a shape substantially in cylinder sector of transverse axis Oy.
  • the reflector 15 has a front edge 22 located between the lens 3 and the light source 2.
  • the reflector 15 is placed so as not to hide the bottom of the transmitter 10, which must be seen from the entire input face 9 of the lens 3 (in order not to decrease the intensity under the cut) and so as to cover a fraction of the top of the transmitter 10 (seen from the input face 9 of the lens) to allow a good fusion of the beam it creates and the main beam (in direct light ).
  • This reflector 15 can thus take the form of a transverse axis cylinder Oy, longer than the emitter.
  • the cross section of the cylinder may be a parabola or a spline curve for example of degree 3 which approaches it (and allows, by adjusting the voltages at its ends, to adjust the shape of the beam).
  • the device is arranged so that the complementary beam is lit only when the vehicle is traveling at a speed greater than a predetermined threshold (non-zero), this threshold being for example substantially equal to 110 km / h.
  • a predetermined threshold non-zero

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP12155491.9A 2011-02-15 2012-02-15 Optische Einheit für Vorrichtung zur Signalisierung und/oder Beleuchtung Active EP2489925B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1151212A FR2971464B1 (fr) 2011-02-15 2011-02-15 Unite optique pour dispositif de signalisation et/ou d'eclairage

Publications (2)

Publication Number Publication Date
EP2489925A1 true EP2489925A1 (de) 2012-08-22
EP2489925B1 EP2489925B1 (de) 2021-10-20

Family

ID=45566948

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12155491.9A Active EP2489925B1 (de) 2011-02-15 2012-02-15 Optische Einheit für Vorrichtung zur Signalisierung und/oder Beleuchtung

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EP (1) EP2489925B1 (de)
FR (1) FR2971464B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013104785A1 (fr) * 2012-01-12 2013-07-18 Valeo Vision Lentille pour module optique de véhicule automobile
FR3004786A1 (fr) * 2013-04-17 2014-10-24 Valeo Vision Lentille, module optique et dispositif d'eclairage et/ou de signalisation pour vehicule automobile
EP3246621A1 (de) * 2016-05-18 2017-11-22 Valeo Vision Diopter mit unterbrechungsausgleich
WO2018177757A1 (de) * 2017-03-29 2018-10-04 Docter Optics Se Scheinwerferlinse für einen kraftfahrzeugscheinwerfer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578966A (en) * 1969-11-05 1971-05-18 Sylvania Electric Prod Vehicle driving light
DE202005004080U1 (de) * 2005-03-14 2005-07-07 Zizala Lichtsysteme Gmbh Linse für einen Fahrzeugscheinwerfer
US20050200976A1 (en) * 2002-06-14 2005-09-15 Ralf Bonitz Optical lens soft-focus effect
WO2006033040A1 (en) * 2004-09-20 2006-03-30 Koninklijke Philips Electronics N.V. Led collimator element with a semiparabolic reflector
EP1762776A1 (de) 2005-09-09 2007-03-14 Valeo Vision Verfahren zur Herstellung eines Moduls eines Kraftfahrzeugscheinwerfers
GB2436691A (en) * 2006-03-28 2007-10-03 Visteon Global Tech Inc LED projector headlamps using single or multi-faceted lenses
FR2902496A1 (fr) * 2006-02-17 2007-12-21 Automotive Lighting Reutlingen Installation d'eclairage pour vehicule
EP1970619A1 (de) * 2007-03-14 2008-09-17 Valeo Vision Optisches Modul für Kraftfahrzeugscheinwerfer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578966A (en) * 1969-11-05 1971-05-18 Sylvania Electric Prod Vehicle driving light
US20050200976A1 (en) * 2002-06-14 2005-09-15 Ralf Bonitz Optical lens soft-focus effect
WO2006033040A1 (en) * 2004-09-20 2006-03-30 Koninklijke Philips Electronics N.V. Led collimator element with a semiparabolic reflector
DE202005004080U1 (de) * 2005-03-14 2005-07-07 Zizala Lichtsysteme Gmbh Linse für einen Fahrzeugscheinwerfer
EP1762776A1 (de) 2005-09-09 2007-03-14 Valeo Vision Verfahren zur Herstellung eines Moduls eines Kraftfahrzeugscheinwerfers
FR2902496A1 (fr) * 2006-02-17 2007-12-21 Automotive Lighting Reutlingen Installation d'eclairage pour vehicule
GB2436691A (en) * 2006-03-28 2007-10-03 Visteon Global Tech Inc LED projector headlamps using single or multi-faceted lenses
EP1970619A1 (de) * 2007-03-14 2008-09-17 Valeo Vision Optisches Modul für Kraftfahrzeugscheinwerfer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013104785A1 (fr) * 2012-01-12 2013-07-18 Valeo Vision Lentille pour module optique de véhicule automobile
US9328888B2 (en) 2012-01-12 2016-05-03 Valeo Vision Lens for an optical module of a motor vehicle
FR3004786A1 (fr) * 2013-04-17 2014-10-24 Valeo Vision Lentille, module optique et dispositif d'eclairage et/ou de signalisation pour vehicule automobile
EP3246621A1 (de) * 2016-05-18 2017-11-22 Valeo Vision Diopter mit unterbrechungsausgleich
FR3051537A1 (fr) * 2016-05-18 2017-11-24 Valeo Vision Dioptre redresseur de coupure
WO2018177757A1 (de) * 2017-03-29 2018-10-04 Docter Optics Se Scheinwerferlinse für einen kraftfahrzeugscheinwerfer
CN110337565A (zh) * 2017-03-29 2019-10-15 博士光学欧洲股份公司 用于机动车前照灯的前照灯透镜
US10914443B2 (en) 2017-03-29 2021-02-09 Docter Optics Se Headlight lens for a motor vehicle headlight
CN110337565B (zh) * 2017-03-29 2022-06-21 博士光学欧洲股份公司 用于机动车前照灯的前照灯透镜

Also Published As

Publication number Publication date
FR2971464B1 (fr) 2014-11-28
FR2971464A1 (fr) 2012-08-17
EP2489925B1 (de) 2021-10-20

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