EP2199664A1 - Beleuchtungsvorrichtung für Fahrzeugscheinwerfer, der mehrere Beleuchtungsfunktionen oder eine veränderbare Funktion mit einer einzigen Lichtquelle ermöglicht - Google Patents
Beleuchtungsvorrichtung für Fahrzeugscheinwerfer, der mehrere Beleuchtungsfunktionen oder eine veränderbare Funktion mit einer einzigen Lichtquelle ermöglicht Download PDFInfo
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- EP2199664A1 EP2199664A1 EP20090178159 EP09178159A EP2199664A1 EP 2199664 A1 EP2199664 A1 EP 2199664A1 EP 20090178159 EP20090178159 EP 20090178159 EP 09178159 A EP09178159 A EP 09178159A EP 2199664 A1 EP2199664 A1 EP 2199664A1
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- Prior art keywords
- reflector
- optical element
- optical axis
- optical
- focus
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Images
Classifications
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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
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
-
- 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
- F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
-
- 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
- F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
-
- 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
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
-
- 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
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
- F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
-
- 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
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
- F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
-
- 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
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
-
- 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
- F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
- F21S43/31—Optical layout 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
- 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
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- 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 invention relates to a projector lighting device, more particularly to a vehicle headlamp lighting device, the device being capable of providing a plurality of lighting functions and / or a variable lighting function with a single lighting device. lighting source.
- the invention relates more particularly to vehicle headlamps equipped with one or more point light sources of the light-emitting diode or LED type.
- This type of light source is indeed more efficient from the point of view of consumption in comparison with more conventional light sources such as halogen or xenon lamps.
- the electrical power of a light source of the LED type adapted to a vehicle headlamp now varies between 20 and 30 W while that of a halogen source of comparable lighting power is of the order of 120 W. is even reasonable to think that LED modules with the same lighting power will soon be available with an electric power of the order of 5 to 10W
- a new European legislation provides an obligation for new vehicles to be equipped with projectors.
- LED lighting sources however, remains quite high in comparison with conventional sources.
- the need to have several functions per projector namely typically the functions “road” or “High Beam” (HB), “code” or “Low Beam” (LB) and “Daytime Running Light” (DRL) and therefore several light sources reinforces the issue of the cost of using LED sources.
- LED lighting sources implies for each source an electronic management module.
- the projector case will therefore be more complicated, bulkier and more expensive.
- the document DE 10 2006 042 749 A1 discloses a vehicle headlighting device comprising an LED light source, an elliptical type reflector in a half-space with two foci.
- the LED source is placed at the first focus of the reflector near the reflector.
- the light emitted by the LED source is reflected by the reflector towards its second focus where a so-called folding reflective surface is positioned.
- This reflecting surface has an edge on the reflector side and an edge on the opposite side of the reflector. These edges are called "cut edges”.
- a portion of the light beam reflected by the reflector encounters the reflecting surface and is reflected in accordance with its angle of incidence on the surface. Another part of the light beam passes over the cutoff edge (s) and is not deflected by the reflecting surface.
- the cutoff edge thus defines a boundary between the portion of the reflected beam and thus deflected and the nonreflected portion.
- a lens is positioned behind the reflective surface so that its focus corresponds to that of the elliptical reflector.
- the reflective surface with its cutoff edge (s) is called a folder because it deflects or "bends" part of the bundle to form a cutoff at the beam emitted by the lens.
- the folder is movable along an axis parallel to the optical axis of the reflector. This mobility ensures the function "road” or "High Beam” and function "code” or "Low Beam” with a single light source.
- the document DE 10 2006 051 029 A1 discloses a device similar to that described above where the "folding” is movable along a vertical axis and an axis parallel to the optical axis of the elliptical reflector. These two movements make it possible to ensure the function "Road” or "High Beam” and the "code” or “Low Beam” function with a single light source.
- the document DE 10 2006 042 750 A1 discloses a device similar to those described above wherein a "folder” is vertically movable and a vertical screen is movably arranged vertically as well. This device ensures the functions "road” and “code” with a single light source and moving the vertical screen also allows to vary the light intensity in the bottom of the beam of the projector.
- the object of the invention is to propose a lighting device that makes it possible to perform several functions with a single light source or a limited number of light sources, and with more possibilities than in the state of light. art.
- the invention consists of a projector lighting device, especially a vehicle, comprising: a reflector having a first focus, a second focus and an optical axis passing through the first and second focus; a light source located near the first focus of the reflector so that the light rays emitted by the light source are reflected by the reflector approximately to its second focus; a first optical element having a focal point and an optical axis, the focus being located near the second focus of the reflector, the first optical element being adapted to project the light rays emitted by the source and reflected by the reflector in a beam along its optical axis; a second optical element preferably comprising a generally planar surface, a zone of which is located near the second focus of the reflector so as to receive, with an angle of incidence, the light rays emitted by the source and reflected by the reflector; wherein the second optical element, preferably generally horizontal, is movable in the plane of its surface, in particular substantially transversely to the optical axis of the
- This device has the advantage of making it possible to provide lighting functions that are different from a simple displacement of the cutoff edge, and this with a single light source or a constant number of light sources in the case of parallel mounting of several devices. .
- the number of functions can be quite high.
- the surface of the second optical element comprises at least two zones positioned one beside the other transversely to the optical axis of the reflector, each zone being at least one of the following types: reflective, transparent , colored, scattering or divergent lens or a spatial combination of these different types.
- the second mobile element is movable in a substantially horizontal plane, preferably in combined directions perpendicular to the optical axis and parallel to the optical axis.
- the surface of the second optical element is of elongate shape, preferably substantially rectangular, with a longitudinal axis, comprising at least two zones distributed along the longitudinal axis, whose optical characteristics are different and selected from the following ones: : reflective, transparent, colored, diffusing or divergent lens or a spatial combination of these different types
- the second optical element is movable in translation, preferably generally in a direction perpendicular to the optical axis of the reflector.
- the surface of the second optical element is of elongated shape slightly curved along a main curve, preferably in a circular arc, and comprising at least two zones distributed along its main curve, the optical characteristics of which are different and selected from among the following: reflective, transparent, colored, diffusing or divergent lens or a spatial combination of these different types
- the second optical element is rotatable along a sufficiently large radius as to ensure a movement of the zones which is transverse to the optical axis of the reflector.
- the surface of the second optical element comprises a reflective zone with a so-called edge cutting edge crossing the optical axis of the reflector, preferably on the opposite side to the reflector.
- the cutting edge has a variable profile in a direction generally perpendicular to the optical axis of the first reflector.
- the cutting edge has a constant profile in a direction generally perpendicular to the optical axis of the first reflector.
- the reflector comprises a curved reflecting surface, preferably elliptical, in a half-space limited by a plane, the first and second focus of the reflector being situated approximately in said plane, the second optical element being movable in said plane or parallel to said plan.
- the second optical element is mobile with at least two indexed positions.
- the second optical element is continuously movable, preferably between two indexed positions.
- the surface of the second optical element comprises at least two optical markers corresponding to the indexed positions, the optical markers being preferentially made by metallization.
- the second optical element is movable in translation and / or in rotation by means of an electric motor, for example a stepping motor, a piezoelectric motor or a solenoid, in particular with two specific actuators of the motor type. step or piezoelectric or solenoid, either with the combination of two of these types of actuators, or with a single piezoelectric motor by controlling the activation frequency appropriately.
- an electric motor for example a stepping motor, a piezoelectric motor or a solenoid, in particular with two specific actuators of the motor type. step or piezoelectric or solenoid, either with the combination of two of these types of actuators, or with a single piezoelectric motor by controlling the activation frequency appropriately.
- the first optical element is of the reflector type, the optical axis of which crosses the optical axis of the reflector, preferably whose optical axis is perpendicular to the optical axis of the reflector.
- the first optical element is a lens whose optical axis corresponds essentially to the optical axis of the reflector.
- the second optical element is also essentially movable along the optical axis of the reflector, preferably in translation, by means of an actuator.
- the device comprises a device for controlling the actuator of the second optical element along the optical axis, capable of displacing, preferably dynamically, a reflecting surface of the second optical element in order to compensate for changes in attitude. of the vehicle.
- the folder according to the invention is preferably substantially flat and horizontal, possibly comprising transparent areas.
- This folder is advantageously movable horizontally.
- the folder may, if desired, be able to be rotated about a distant vertical axis.
- the invention also relates to a vehicle headlight or taillight comprising a device as defined above.
- the invention also relates to a vehicle equipped with such a projector or such a rear light.
- Embodiments of the invention are illustrated in the figures and described hereinafter with respect to a mounting position of the device in a vehicle as a projector.
- This type of application although preponderant is not limiting so that the terms used such as “horizontal”, “vertical”, “high”, “low”, “superior”, “lower” for example, in order to describe the positions of the different elements are not absolute but rather to interpret in a relative manner describing the positions of the elements with respect to their arrangement in the figures.
- the described lighting devices could be mounted in other positions and / or for other applications.
- the relative positions of the various optical elements such as light sources, reflectors and lenses expressed for simplicity of understanding by alignment of the optical axes and / or correspondence of the respective foci are not to be interpreted accurately in the measurement where slight variations are conceivable or even desirable in order, among other things, to correct the non-perfect nature and certain optical aberrations of the optical elements or to obtain certain additional effects.
- the figure 1a is a schematic plan view and section along a median plane of a first embodiment of the invention. It is a lighting device for a vehicle headlamp comprising an elliptical reflector 1 and symmetrical in rotation about its optical axis 2.
- the reflector comprises a reflective inner surface 12 whose profile in section along a plane passing through the axis 2 is an ellipse section. Its inner surface 12 corresponds to the section of ellipse visible at the figure 1a describing a rotation around the optical axis and symmetry 2 in a half-space. This half-space is limited by a plane containing the axis 2 and being horizontal.
- This reflector 1 has two foci along its axis 2.
- a light source 3 is positioned approximately at the location of the first focus and the second focus is referenced by the reference sign 4.
- the reflective inner surface 12 of the reflector may not be perfectly elliptical and have one or more specific or complex profiles in order to optimize the light distribution in the lighting beam. This may imply that the reflector 1 is not perfectly symmetrical in revolution.
- the light source 3 is of the light-emitting diode type or LED which emits the majority of its light energy towards the reflective inner surface 12 of the reflector 1.
- This type of light source has the particularity of being particularly compact to the point where it can be assimilated in an approximate manner to a point source.
- Other known types of light source can, however, also be considered.
- the majority of the light rays emitted by the light source 3 are reflected by the reflective surface 12 of the reflector 1.
- the rays Reflected by the reflector all converge towards the second focus 4.
- the light source is not punctual and the shape of the reflective surface 12 is not necessarily perfectly elliptical so that the reflected rays do not all converge towards the second focus 4 but rather to an area close to the second focus 4.
- a movable optical element 6 is disposed near the second focus 4 in the horizontal plane containing the optical axis and symmetry 2 of the reflector 1.
- This optical element 6 is better illustrated at the figure 1b which is a schematic view in elevation of the device of the figure 1a .
- the section is in the horizontal plane including the axis 2.
- the optical element 6 is movable in translation along its longitudinal axis 11 perpendicular to the optical axis 2 and included in the horizontal plane.
- the optical element comprises a substantially planar surface which itself comprises different optically different areas to provide different functions of the illumination device.
- the optical element 6 is actuated in translation along the axis X by an actuator 10 and in translation along the axis Z by an actuator 14.
- actuators can be of the electric type such as for example an electric motor, a piezoelectric motor , or any other type of actuator known to those skilled in the art and adapted to move the optical element 6.
- the different optical zones of the optical element 6 may be of the reflecting type, transparent, transparent colored , scattering, lens, or a spatial combination of these different types, etc ...
- the optical element 6 is displaceable in a substantially horizontal plane, according to combined movements perpendicular (s) to the optical axis 2 and parallel (s) to the optical axis 2, by means of a single piezoelectric motor, with appropriate control of the activation frequencies.
- the light rays 7 reflected by the reflector 1 which converge towards the second focus 4 and which meet the surface of the optical element 6 are reflected or transmitted depending on the optical nature of the surface portion encountered. If the surface encountered is reflective, the spokes 7 will be reflected upwards with respect to the axis 2 as shown in FIG. figure 1a .
- the rays 9 reflected by the reflector not meeting the surface of the optical element 6 propagate downwards with respect to the axis 2, as is also illustrated in FIG. figure 1a .
- a lens 5 is provided on the optical path of the device.
- This lens of the convex plane type has its focus corresponding to the second focus 4 of the reflector 1 and its optical axis coincides with the optical axis of the reflector so that the light rays coming from the focus 4 are transmitted substantially parallel to the optical axis 2.
- Other types of convergent lens are conceivable, such as a biconvex lens or convergent meniscus type.
- a reflector of the paraboloid mirror type is also conceivable. In this case, its optical axis would be substantially perpendicular or at least transverse to the axis 2 and its focus would be approximately coincident with the focus 4. Such a reflector would then reflect the light rays in a direction substantially parallel to its optical axis, that is to say substantially transversely or perpendicularly to the optical axis 2.
- FIG. 1a and 1b the light rays coming from the reflector are inverted with respect to a vertical plane and also with respect to a horizontal plane after their passage towards the focus 4 and the optical element 6.
- An XYZ reference is represented at Figures 1a and 1b where the axis Z corresponds to the optical axis 2 and approximately to the axis of projection, the axis X corresponds to the perpendicular to the axis Z and contained in the plane delimiting the half-space of the reflector 1 and comprising the 11 axis of displacement of the optical element 6, and the Y axis corresponds to the perpendicular to the plane defined by the axes X and Z.
- the rays reflected by the reflector 1 intersect the optical axis 2 at the optical element 6 and pass on the other side of the vertical plane or the plane containing the axis 2 and parallel to the Y axis. same phenomenon occurs with respect to the plane containing the axis 2 and parallel to the X axis.
- figure 1a shows in fact that the rays reflected by the reflector 1 intersect the plane in question and, for those not reflected by the optical element 6, pass on the other side of the plane. This phenomenon does not apply to the rays 7 reflected at the plane by the optical element, which remain on the same side of the plane.
- the optical element 6 may comprise four or more distinct optical zones. These are illustrated in detail in Figures 2 to 6 .
- the first zone 6a is of the concave plane lens type in order to diffuse the light rays.
- the principle of this phenomenon is illustrated in figure 3 .
- the element 6 When the element 6 is positioned to present the area 6a to light rays from the reflector 1, they pass through the area 6a and are diffracted in a divergent manner so as to illuminate a large part of the lens. This generates an enlarged illumination beam which, combined with a reduction in the power of the light source, corresponds to the daylighting function commonly known as DRL (Daytime Running Light).
- DRL Daytime Running Light
- the divergence function of the zone 6a can be reached by various known means, for example and non-exhaustively a diffusing surface treatment or a divergent microlens array.
- the second zone 6b of the optical element 6 is a so-called "folding" reflecting surface.
- the optical principle of operation of this zone is illustrated in figure 4 the light rays coming from the reflector 1 meeting this surface are reflected at an angle to the vertical at the surface which is equal to that of the incident rays. These incident rays are sent back to the upper part of the lens.
- the rays not meeting the reflective surface 6b traverse the horizontal plane and evolve in the lower half-space without deflection to the lens.
- the boundary between the reflective zone 6b and the region of the horizontal plane traversed by the non-deflectable rays is physically formed by the leading edge and / or possibly rearward of the zone 6b and is called the cutting edge.
- the rays 8 reflected by the folder are refracted by the upper part of the lens. These rays reflected by the folder will therefore generate rays projected by the lens whose imprint will be different from that which would be generated by these rays if they were not reflected by the folder.
- the reflected rays are projected by the upper part of the lens slightly inclined downwardly with respect to the optical axis whereas these rays would have been projected by the lower part of the lens slightly inclined upwards with respect to the optical axis if they had been transmitted without reflection.
- This effect can also be reinforced or influenced by various parameters such as, for example, a slight inclination of the folder with respect to the optical axis, a complex non-planar shape of the folder, a complex shape of the lens (or of a paraboloidal reflector). in place of the lens) and / or a slight offset of the folder along the Y axis relative to to the optical axis.
- the optical element 6 can be displaced along the axis Z corresponding to the optical axis by means of an actuator 14. These displacements make it possible to move the cutting edge forward or backward so as to modulate the height cut-off of the beam projected by the device. This function is particularly suitable for compensating for changes in inclination of the device such as the attitude of the vehicle on which the device is mounted.
- This adaptation may be punctual when starting the vehicle to compensate, for example, a large load of the trunk or may be permanent when driving the vehicle to compensate, for example, a change of attitude in a longitudinal plane when braking or accelerations.
- the cutting edge does not have to be straight and perpendicular to the optical axis, it can indeed be inclined or have a complex profile in order to optimize the projected impression and / or to compensate for certain aberrations inherent to certain elements. optics.
- the reflective optical zone 6b may correspond to a so-called "code” or "low beam” function for crossing with other vehicles coming in the opposite direction, where the impression of the projected beam is cut in its upper part.
- An inclination of the cutting edge (not shown) makes it possible to obtain an imprint whose upper part varies along the X axis.
- the third zone 6c of the optical element 6 is a partially transparent and partially reflecting surface. It has an L shape, where the L branches are transparent and the rest of the area is reflective. The reflective part is represented by the hatched area.
- This zone corresponds to a so-called “selective" function that makes it possible to vary the projected impression along the X axis so as to match the cut portion to a vehicle coming in the opposite direction.
- the reflecting surface will reflect light rays from the reflector (1) which will then be refracted by the lens (5).
- the reflective surface of the zone 6c will therefore limit the height of the beam on its left.
- Area 6c shown in figure 2 corresponds to a vehicle headlight.
- the projector on the opposite side shall have a zone 6c symmetrical about the Z axis.
- Each headlamp will therefore have in this function a lighting beam with a darkened area at the top of the other projector's side, respectively, thus forming a high window darkened in the lighting footprint of both projectors.
- the two respective zones 6c can then be moved in a continuous and controlled manner according to the position of the opposite vehicle so as to move the window transversely along the X axis.
- the movements of the optical elements of the two projectors in the "selective" function need not necessarily be identical. Indeed, it may be desired or necessary to expand the window according to the approximation of the opposite vehicle and thereby move the optical elements of the two projectors in a differentiated manner.
- the entire optical device of the headlight can be rotated along an axis substantially parallel to the axis Y.
- a displacement of the window along the axis Y can also be displaced along the optical axis or Z axis. Such a displacement is desirable or even necessary so that the window can follow an opposing vehicle approaching.
- the shape of the reflective part may be different from that of the figure 2 .
- the optical principle of operation is illustrated in figure 5 showing that some rays cross the surface without (or with very little) deviation and others are reflected according to the location of the area they encounter.
- the fourth zone 6d of the optical element is a transparent surface or empty of any optical function.
- the optical principle of operation is illustrated in figure 6 which illustrates that all rays are transmitted without (or with very little) deviation. This position corresponds to a function called "road” or "High Beam", that is to say, a natural imprint uncut optical device.
- the device described thus makes it possible to provide four lighting functions by means of a single light source.
- the passage from one function to another is done by means of the actuator 10 which displaces the optical element 6 in translation until the corresponding zone is in a position centered longitudinally on the focal point 4 of the optical device.
- a second embodiment is illustrated in Figures 7 and 8a-8d .
- the architecture of this device is similar to that of the first embodiment, namely an elliptical reflector 1 in a half-space, a light source 3 illuminating essentially in the half-reflector space and positioned at the first focus of the reflector, an optical element 6 'movable transversely and longitudinally to the level of the second focus 4 of the reflector and a lens whose focus corresponds to the second focus 4 of the reflector.
- This device is distinguished from that of the first embodiment by the optical element 6 '. It comprises two optical zones: a first zone 6a 'transparent and a second zone comprising a major portion 6b' reflecting and a minor transparent portion 6c '.
- the border between the reflective portion 6b 'and the transparent portion 6c' corresponds to the cutoff edge.
- the device has four functions that are schematically illustrated in FIGS. Figures 8a to 8d .
- the optical element 6 ' is enlarged therein for the sake of clarity.
- the first function is illustrated in figure 8a where the transparent area is in function, that is, positioned transversely at the second focus of the reflector.
- This first function is the so-called “road” or “high beam” function generating a natural projection footprint of the optical device.
- the second function is illustrated in figure 8b where the zones 6a 'and 6b' are straddling the region of the second focus where the rays coming from the reflector 1 pass.
- This function is said to be “selective” which makes it possible to vary along the X axis the projected imprint so as to Match the cut portion to a vehicle coming in the opposite direction.
- the transverse position of the optical element is continuously variable in order to be able to "follow" the position of the oncoming vehicle. Practically speaking, a portion of the rays reflected by the reflector are reflected by the reflecting surface 6b '. The reflection caused by the so-called "folding" reflective surface will reduce the height of the corresponding part of the impression. The height of the impression is thus reduced to its left.
- the progressive displacement of the optical element 6 'to the left corresponding to an increase of the active reflecting surface will modify the impression of the projected beam by widening the lowering of height to the right.
- This function in combination with a second symmetrical headlamp makes it possible to form a darkened window by adapting the cutting and lowering of the beam to an opposite vehicle whose angular position relative to the vehicle illuminated by the device varies.
- a displacement of the window along the Y axis can also be combined with a displacement along the optical axis or axis Z. Such a displacement is desirable or necessary so that the window can follow an opposite vehicle approaching.
- the third function is illustrated in figure 8c where the reflective rectangular portion of the zone 6b 'is active. It generates a cut across the entire width of the footprint. It may be a so-called “tourist” function that is that of a vehicle normally rolling on the left and rolling in a territory where one is driving on the right. The projected beam is cut across its entire width and thus avoids a glare that would otherwise take place in lighting of the type "code” or "crossing" for a roller on the left.
- the fourth function is illustrated in figure 8d where the transparent area 6c 'is partially active. In this position, a part of the rays coming from the right part of the reflector 1 meets and crosses the transparent part 6c 'and is then refracted and projected towards the upper left part of the beam. Corresponding rays from the left reflector portion are reflected by the reflecting surface 6b '. Part of the rays can pass the front edge of the reflective surface. The resulting imprint is limited in height due to the cutting edge before the reflective surface, and in an inverted manner. The section of the cutting edge which is more advanced than the inclined edge limits the height on the right side of the impression and the inclined edge limits the height on the left side of the impression to a lesser extent and in a progressive manner. This is a "code” or "Low Beam” function for a vehicle intended for driving on the left.
- the optical element should simply have a transparent surface and a reflective portion.
- the reflective part can be made quite simply by metallization on a support.
- the displacement of the optical element must be transversal but not necessarily in translation. Indeed, depending on various parameters such as the available space and the number of functions to be provided, one could provide an optical element slightly curved in the plane of its surface and rotate it according to a center of rotation located for example behind the reflector and the light source on the optical axis.
- the surface of the optical element which comprises the different optical zones does not necessarily have to be flat. On the contrary, depending on the different optical effects desired, one can imagine a slightly complex surface.
- the transverse movement of the optical element need not be perpendicular to the optical axis and in the plane delimiting the half-space of the reflector.
- a transversal movement but not perpendicular as well as in a plane forming a certain angle with the plane delimiting the half-space of the reflector, and this according to various parameters such as, for example, the maximum size.
- the optical element may also be located at a short distance from the plane delimiting the half-space of the reflector, as a function, for example, of the various imperfections and / or aberrations of the optical elements.
- the described embodiments comprise a single light source. It is quite possible to envisage several light sources or several devices similar in parallel where the mobile optical elements would be mechanically linked and move by a single actuator.
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- 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0807289A FR2940403B1 (fr) | 2008-12-19 | 2008-12-19 | Dispositif d'eclairage pour projecteur de vehicule assurant plusieurs fonctions d'eclairage ou une fonction variable avec une seule source lumineuse |
Publications (2)
Publication Number | Publication Date |
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EP2199664A1 true EP2199664A1 (de) | 2010-06-23 |
EP2199664B1 EP2199664B1 (de) | 2015-09-23 |
Family
ID=40763469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP09178159.1A Active EP2199664B1 (de) | 2008-12-19 | 2009-12-07 | Beleuchtungsvorrichtung für Fahrzeugscheinwerfer, der mehrere Beleuchtungsfunktionen oder eine veränderbare Funktion mit einer einzigen Lichtquelle ermöglicht |
Country Status (3)
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EP (1) | EP2199664B1 (de) |
JP (1) | JP5629457B2 (de) |
FR (1) | FR2940403B1 (de) |
Cited By (12)
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WO2012034936A1 (de) * | 2010-09-18 | 2012-03-22 | Automotive Lighting Reutlingen Gmbh | Kraftfahrzeugscheinwerfer mit einem mehrfunktions-projektionsmodul |
EP2546569A2 (de) | 2011-07-13 | 2013-01-16 | Valeo Vision | Multifunktions-Beleuchtungs-/Signalisierungsvorrichtung für Kraftfahrzeug |
DE102012224345A1 (de) * | 2012-12-21 | 2014-06-26 | Osram Gmbh | Fahrzeug-Leuchtvorrichtung |
EP2228593A3 (de) * | 2009-03-12 | 2015-03-11 | Koito Manufacturing Co., Ltd. | Fahrzeugscheinwerfer |
WO2015185339A1 (de) * | 2014-06-03 | 2015-12-10 | Osram Gmbh | Beleuchtungseinrichtung |
FR3022322A1 (fr) * | 2014-06-16 | 2015-12-18 | Valeo Vision | Module d'eclairage et/ou de signalisation rotatif |
CN107013862A (zh) * | 2015-12-10 | 2017-08-04 | 法雷奥照明公司 | 具有组合近光和远光功能和可调光源的机动车辆照明模块 |
EP3428012A3 (de) * | 2017-06-22 | 2019-03-06 | LG Electronics Inc. | Lampe für ein fahrzeug |
CN111692568A (zh) * | 2019-03-14 | 2020-09-22 | 法雷奥照明公司 | 对集光器的虚拟照亮表面进行成像的发光装置 |
WO2021170400A1 (fr) * | 2020-02-27 | 2021-09-02 | Valeo Vision | Module lumineux de véhicule automobile comprenant un dispositif électrochromique |
FR3107749A1 (fr) * | 2020-02-27 | 2021-09-03 | Valeo Vision | Module lumineux de véhicule automobile comprenant un dispositif électrochromique |
CN114423992A (zh) * | 2019-08-08 | 2022-04-29 | Sgm照明股份公司 | 具有机动化准直控制的照明装置 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2979688A1 (fr) | 2011-09-05 | 2013-03-08 | Valeo Vision | Module optique pour dispositif de signalisation et/ou d'eclairage |
US10591124B2 (en) * | 2012-08-30 | 2020-03-17 | Sabic Global Technologies B.V. | Heat dissipating system for a light, headlamp assembly comprising the same, and method of dissipating heat |
FR3011310B1 (fr) | 2013-09-30 | 2018-02-02 | Valeo Vision | Module d'eclairage et/ou de signalisation avec plusieurs systemes optiques rotatifs |
KR101592648B1 (ko) | 2013-12-23 | 2016-02-12 | 현대자동차주식회사 | 헤드램프 장치 |
JP6102878B2 (ja) * | 2014-10-02 | 2017-03-29 | マツダ株式会社 | 車両用前照灯 |
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Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2228593A3 (de) * | 2009-03-12 | 2015-03-11 | Koito Manufacturing Co., Ltd. | Fahrzeugscheinwerfer |
WO2012034936A1 (de) * | 2010-09-18 | 2012-03-22 | Automotive Lighting Reutlingen Gmbh | Kraftfahrzeugscheinwerfer mit einem mehrfunktions-projektionsmodul |
EP2546569A2 (de) | 2011-07-13 | 2013-01-16 | Valeo Vision | Multifunktions-Beleuchtungs-/Signalisierungsvorrichtung für Kraftfahrzeug |
FR2977927A1 (fr) * | 2011-07-13 | 2013-01-18 | Valeo Vision | Dispositif d'eclairage/signalisation multifonctions pour vehicule automobile. |
EP2546569A3 (de) * | 2011-07-13 | 2013-03-13 | Valeo Vision | Multifunktions-Beleuchtungs-/Signalisierungsvorrichtung für Kraftfahrzeug |
DE102012224345A1 (de) * | 2012-12-21 | 2014-06-26 | Osram Gmbh | Fahrzeug-Leuchtvorrichtung |
US9341335B2 (en) | 2012-12-21 | 2016-05-17 | Osram Gmbh | Vehicle lighting device |
US10125940B2 (en) | 2014-06-03 | 2018-11-13 | Osram Gmbh | Illumination device |
WO2015185339A1 (de) * | 2014-06-03 | 2015-12-10 | Osram Gmbh | Beleuchtungseinrichtung |
FR3022322A1 (fr) * | 2014-06-16 | 2015-12-18 | Valeo Vision | Module d'eclairage et/ou de signalisation rotatif |
EP2957821A1 (de) * | 2014-06-16 | 2015-12-23 | Valeo Vision | Drehbares beleuchtungs- und/oder signalisierungsmodul |
CN107013862A (zh) * | 2015-12-10 | 2017-08-04 | 法雷奥照明公司 | 具有组合近光和远光功能和可调光源的机动车辆照明模块 |
EP3428012A3 (de) * | 2017-06-22 | 2019-03-06 | LG Electronics Inc. | Lampe für ein fahrzeug |
US10655819B2 (en) | 2017-06-22 | 2020-05-19 | Zkw Group Gmbh | Lamp for vehicle and method for controlling the same |
CN111692568A (zh) * | 2019-03-14 | 2020-09-22 | 法雷奥照明公司 | 对集光器的虚拟照亮表面进行成像的发光装置 |
CN114423992A (zh) * | 2019-08-08 | 2022-04-29 | Sgm照明股份公司 | 具有机动化准直控制的照明装置 |
US11959630B2 (en) | 2019-08-08 | 2024-04-16 | Sgm Light A/S | Lighting device with motorised collimation control |
WO2021170400A1 (fr) * | 2020-02-27 | 2021-09-02 | Valeo Vision | Module lumineux de véhicule automobile comprenant un dispositif électrochromique |
FR3107749A1 (fr) * | 2020-02-27 | 2021-09-03 | Valeo Vision | Module lumineux de véhicule automobile comprenant un dispositif électrochromique |
US11841122B2 (en) | 2020-02-27 | 2023-12-12 | Valeo Vision | Motor vehicle light module comprising an electrochromic device |
Also Published As
Publication number | Publication date |
---|---|
FR2940403A1 (fr) | 2010-06-25 |
FR2940403B1 (fr) | 2014-01-17 |
JP2010147025A (ja) | 2010-07-01 |
JP5629457B2 (ja) | 2014-11-19 |
EP2199664B1 (de) | 2015-09-23 |
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