EP3449178B1 - Dispositif d'illumination pour phare de véhicule avec une distribution de lumière ayant une coupure - Google Patents

Dispositif d'illumination pour phare de véhicule avec une distribution de lumière ayant une coupure Download PDF

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Publication number
EP3449178B1
EP3449178B1 EP17723237.8A EP17723237A EP3449178B1 EP 3449178 B1 EP3449178 B1 EP 3449178B1 EP 17723237 A EP17723237 A EP 17723237A EP 3449178 B1 EP3449178 B1 EP 3449178B1
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EP
European Patent Office
Prior art keywords
collimator
light
focal
line
exit lens
Prior art date
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Application number
EP17723237.8A
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German (de)
English (en)
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EP3449178A1 (fr
Inventor
Bernd EICHINGER
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ZKW Group GmbH
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ZKW Group GmbH
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Publication of EP3449178A1 publication Critical patent/EP3449178A1/fr
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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
    • 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
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • 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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel 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]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • 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
    • F21S41/24—Light guides
    • 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
    • F21S41/27—Thick 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
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • 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

Definitions

  • the invention relates to a lighting device with at least two such lighting units, preferably the translucent body of the Lighting units lie horizontally next to one another and / or one above the other, and in particular the translucent bodies of the at least two lighting units are connected to one another, preferably being formed in one piece.
  • the invention also relates to a motor vehicle headlight which has at least one such lighting unit or at least one such lighting device.
  • a lighting unit in connection with the present invention can be used in a motor vehicle headlight e.g. can be used to implement part of a low beam distribution, in particular the apron light distribution of a low beam distribution or to implement fog light.
  • a lighting unit mentioned at the outset can be implemented in the area of the light exit surface with a low overall height, which in certain embodiments can only be up to 10 mm or up to 15 mm high, so that there is a slit-shaped light exit surface extending in the horizontal direction.
  • the light fed into the light-guiding body is deflected by a totally reflecting reflector formed in the light-guiding body onto the exit lens.
  • a device for light emission which has a substantially cylindrical optical body with a light entry and a light exit area. Light beams propagate from the light entry area through the optical body to the light exit area, the light beams being partially absorbed in a central area which is formed by an indentation of the optical body.
  • a vehicle headlight with a light emitter and a projection lens is known.
  • a central area of the projection lens is designed to To emit light rays parallel to an optical axis of the projection lens.
  • An edge region of the projection lens is designed to emit light rays at an angle to the optical axis.
  • the DE 10 2006 007 450 A1 shows a lighting device in a vehicle with a primary reflector for generating a core light distribution and a secondary reflector interacting with a lens for generating a peripheral light distribution.
  • the light exit surface ie the outer surface of the exit lens
  • the light image that can be achieved or the light distribution that can be achieved in the horizontal direction is often not sufficiently wide and that the illumination of the street has disruptive inhomogeneities.
  • the optical body is preferably a full body.
  • the outer surface of the exit lens is formed by a groove-shaped structure in a smooth base surface, the grooves forming the groove-shaped structure running in a substantially vertical direction, and in each case two grooves lying side by side in the horizontal direction by a in particular, essentially vertical elevation, which extends over the entire vertical extent of the grooves, are separated, wherein the groove depth, in particular linear, from a certain initial value A 0 to one
  • the smooth base surface is preferably C0-continuous and in particular has no horizontally running edges.
  • the smooth width of the exit lens can often not achieve the necessary width for the desired light image, in particular not for an apron light distribution of a low-beam light distribution. This can be problematic, in particular if a deflecting reflector, as provided in the present invention, is dispensed with.
  • the structure provided on the outer surface of the exit lens achieves horizontal blurring of the emerging light beams, as a result of which the desired width of the light distribution can be achieved.
  • the at least one boundary surface of the at least one collimator is designed in such a way that the light totally reflected on this at least one boundary surface of the light source assigned to the collimator is radially converged in such a way that it is focused on the focal line or in the focal line region becomes.
  • a central coupling area of the at least one collimator is designed in the form of a lens, in particular in the form of a free-form lens, such that light coupled into the collimator is radiated in the vertical direction in a converging manner, so that it is bundled on the focal line or in the focal line area.
  • the at least one collimator in particular at least one boundary surface and / or a central coupling area of the at least one collimator, is or are designed such that the light beams emerging from the at least one collimator run parallel to one another in the horizontal direction .
  • the at least one collimator in particular at least one boundary surface or a central coupling area, is designed such that the light beams emerging from the at least one collimator run in a horizontal direction, preferably in such a way that cross the light rays approximately in the area of the exit lens, in particular approximately in the area of the outer surface of the exit lens.
  • the width of the light distribution can be increased with the opposite width of the light-guiding (optical) body.
  • the lens area is generally a free-form lens, with mostly positive refractive power, but which is not rotationally symmetrical.
  • the so-called east / west / north / south curves of the outer surface of the collimator are preferably also free-form curves.
  • these curves represented in simplified form, represent a series of roughly 'elliptical' curve sections; for parallel alignment, in simplified form, there are roughly 'parabolic' curves.
  • these curves for example the above-mentioned east / west / north / south curves (or other curves, or a different number of curves) have been determined, they are connected to a preferably at least G1-constant surface, for example in such a way that with each constant Z (parallel planes that are normal to the optical axis) the two assigned curve points lie on an ellipse.
  • a corresponding choice of the tangent directions at these connection points creates a closed contour curve that fulfills the G1 continuity condition.
  • the lighting unit has exactly one collimator with an assigned light source.
  • a motor vehicle headlight consists, for example, of eight to fifteen lighting units according to the invention.
  • the at least one collimator and the exit lens are arranged with respect to one another in such a way that exits from the at least one collimator Light reaches the exit lens directly, in particular without prior deflection and / or reflection.
  • the light source with its associated collimator is preferably located at one end of the translucent optic body, at the other, opposite end is the exit lens, in between only the focal line area with the focal line; there is no deflecting reflector, so that the optic body can be built significantly lower.
  • a light exit surface of the at least one collimator is essentially normal to an optical axis of the exit lens.
  • Each collimator has a light exit surface, which is of flat design, with which the collimator integrally merges into the optics body, preferably made of identical material, so that this light exit surface has no optical effect.
  • two outer surfaces of the optic body that run towards each other form a body edge which lies in the region of the focal line or in the focal line region or forms the focal line region.
  • the outer surface of the optical body facing the at least one collimator may be designed to absorb light, at least in some areas, preferably in its entire area, for light propagating in the optical body and incident on this outer surface of the optical body.
  • the corresponding optical body outer surface can be covered, for example with a black cover element, e.g. an aperture or a corresponding coating etc.
  • a black cover element e.g. an aperture or a corresponding coating etc.
  • the outer surface of the exit lens is formed by a groove-shaped structure in a smooth base surface.
  • the first basic cutting curves which result when the smooth base surface is cut with first, non-vertical cutting planes run in a straight line, and the first outer surface curves which result when the outer surface is cut with these first cutting planes. Intersection curves have a sinusoidal course.
  • the zero crossings of the sinusoidal first outer surface intersection curves lie on the first basic intersection curves.
  • the value for the constant k is identical for all first outer surface intersection curves.
  • the second basic cutting curves resulting when the smooth base surface is cut with second, vertical cutting planes, which run parallel to an optical axis of the exit lens are curved, in particular curved outwards, preferably the second Basic intersection curves are continuous.
  • the second outer surface intersection curves which result when the outer surface is cut with defined second cutting planes connect points of the outer surface with a maximum distance from the base surface.
  • the normal distance to the second outer surface intersection curve is a function A (s) of a parameter s which indicates the position on the second basic intersection curve .
  • the second cutting planes are vertical planes parallel to the optical axis of the translucent body, i.e. the exit lens of the optical body.
  • the optical axis is to be understood as the optical axis of the optical body, in particular the center line of the optical body defined with respect to the apex of the exit lens.
  • the first cutting plane is as follows: the first cutting plane in the considered point is a plane that is normal to the tangent plane to the base surface, this plane, i.e. the first cutting plane, further normal to the second cutting plane in which the point lies.
  • the second sectional plane is a vertical sectional plane through the smooth base surface, which runs parallel to the optical axis (or through this optical axis) and in which the point under consideration lies.
  • the outer surface of the exit lens is curved outwards in the vertical direction, and preferably extends in a straight line in the horizontal direction, and is formed, for example, by a cylindrical surface with a straight cross section along an outwardly convex curve.
  • An example of such an outwardly convex curve is an aspherical lens contour.
  • it is a free-form lens that is curved outwards in the vertical direction and is not curved in the horizontal direction.
  • the at least one light source preferably comprises one or more semiconductor-based light-emitting elements, e.g. a light emitting diode or a plurality of light emitting diodes, and / or e.g. comprises at least one laser light source comprising at least one laser diode with at least one conversion layer.
  • semiconductor-based light-emitting elements e.g. a light emitting diode or a plurality of light emitting diodes
  • at least one laser light source comprising at least one laser diode with at least one conversion layer.
  • a light source e.g. one of the light sources described above, which has a flat light-emitting surface or whose light-emitting surfaces lie in one plane. It is then preferably also provided that the normal to this flat light-emitting surface or this plane (the light-emitting surfaces) is normal to the light exit surface of the collimator assigned to the light source and / or runs parallel to the optical axis of the exit lens. Tilt angles between the normal direction and the optical axis are also conceivable, in particular tilt angles of max. 10 °. This can e.g. When combining several lighting units next to each other, it can be advantageous where the exit lens is inclined to the direction of propagation (vehicle structure) so that the LEDs can still be mounted on a common plate.
  • a sinusoidal groove optic is provided in summary, the sine function being normal to the lens surface, ie the smooth base surface of the exit lens.
  • the period preferably remains unchanged, while preferably the groove depth (amplitude), in particular linear, for example as described above, from a certain initial value A 0 or A 0 ⁇ K (with this value the width of the light distribution can be set) at the upper edge of the light exit surface changed to a value of zero or A 0 ⁇ (K - 1) on the lower edge of the lens.
  • the light distribution widens as desired, and surprisingly it has also been found that the light-dark boundary does not bend outwards, even with a straight-line focal line of the translucent body.
  • the terms “above”, “below”, “horizontally”, “vertically” are to be understood as indications of the orientation when the unit is arranged in the normal use position after it has been installed in a lighting device mounted in the vehicle.
  • the Figures 1, 1a , 2 and 2a show a lighting unit 100 according to the invention for a motor vehicle headlight for generating a light beam with a cut-off line.
  • the lighting unit comprises a light source 1, a collimator 2, an exit lens 3 with an outer surface 3a and a focal line region 4 which is arranged between the collimator 2 and the exit lens 3.
  • Collimator 2 exit lens 3 and focal line region 4 are formed from a translucent, one-piece body 101 ("optic body"), the optic body 101 preferably being - generally, i.e. not limited to the present embodiment - is a full body, i.e. around a body that has no through openings or opening inclusions.
  • the translucent material from which the body 101 is formed preferably has a refractive index greater than that of air.
  • the material contains, for example, PMMA (polymethyl methacrylate) or PC (polycarbonate) and is particularly preferably formed therefrom.
  • the body 101 can also be made of inorganic glass material.
  • the optical body 1 has two optical body outer surfaces 1a, 1b which run towards one another on its underside and which converge into a body edge 4 '.
  • This body edge 4 ' lies in the region of the focal line FL of the exit lens or in the focal line region 4.
  • the outer surface 1a of the optical body facing the collimator 2 is at least partially, preferably in its entire area, on its outside in the Optical body 1 is propagating light, incident on this outer surface 1a of the optical body, and is designed to absorb light.
  • the corresponding optical body outer surface 1a can be covered, for example with a black cover element, e.g. an aperture or a corresponding coating etc. In this way it can be prevented that light can emerge from the optic body in an uncontrolled manner or is reflected back into the optic body and then propagate there in an uncontrolled manner.
  • a black cover element e.g. an aperture or a corresponding coating etc.
  • the light source 1 comprises one or more semiconductor-based light-emitting elements, e.g. a light emitting diode or a plurality of light emitting diodes, and / or e.g. at least one laser light source comprising at least one laser diode with at least one conversion layer.
  • the light source 1 is lower than the focal line region 4 or the focal line FL.
  • the collimator 2 is designed and arranged in such a way that at least some or all of the light beams S1 fed into the collimator 2 by the light source 1 exit the collimator 2 (light beams S2) such that they collide with the focal line FL or into the focal line region 4 in the vertical direction to be bundled like this in Figure 3 is shown.
  • an outer boundary surface 2a of the collimator 2 is designed such that the light totally reflected on this boundary surface 2a is radiated converging in the vertical direction, so that it is focused on the focal line FL or in the focal line region 4.
  • the collimator 2 has a coupling recess 2 ′ which has lateral coupling surface 2c, via which light S1 coupled in by the light source 1 is emitted onto the boundary surface 2a.
  • the coupling recess 2 ' has a central coupling region 2b, which is preferably designed in the form of a lens, in particular in the form of a free-form lens 2b', such that light S1in coupled into the collimator 2 via the central coupling region 2b is radiated converging in the vertical direction (light beams S2), so that it is focused on the focal line FL or in the focal line region 4.
  • the light beams S2 emerging from the collimator 2 will ultimately be deflected by the exit lens 3 at least in the vertical direction V such that the light beams S3 emerging from the exit lens 3 form a light distribution with a light-dark boundary, the light-dark Boundary as an image of the focal line FL or the focal line region 4 through the exit lens 3 results.
  • the focal line FL which lies in the optical axis Z of the exit lens, lies in the vertical direction approximately at the level of the body edge 4 'or slightly below.
  • Figure 2b shows in this context a further embodiment, in which the body edge 4 'lies above the focal line FL of the exit lens 3. Such a height difference in the vertical direction can be used to adjust the extent of the cut-off in the light image.
  • Figure 3a shows how the light rays S2 "emerging” from the collimator 2 run in the horizontal direction.
  • the collimator 2 is designed in such a way, in particular its boundary surface 2a and the central coupling-in area 2b in the form of a free-form lens 2b ', that the light rays S2 "emerging” from the collimator are parallel to one another in the horizontal direction, and preferably also parallel to the optical axis Z, run. In this way, an improved homogeneity of the light beams in the area at the exit lens and the light distribution can be achieved.
  • the collimator 2 and the exit lens 3 are arranged with respect to one another in such a way that light emerging from the collimator 2 S2 reaches the exit lens 3 directly, in particular without prior deflection and / or reflection by a reflector.
  • the light source 1 with its associated collimator 2 is located at one end of the translucent optic body 101, at the other, opposite end is the exit lens 3, in between only the focal line area 4 with the focal line FL; there is no deflecting reflector, so that the optical body 101 can be built significantly lower.
  • a light exit surface 2d of the collimator 2 is essentially normal to an optical axis Z of the exit lens 3.
  • the collimator 2 has a light exit surface 2d, which is of flat design, with which the collimator 2 integrally merges into the rest of the optics body, preferably of an identical material, so that this light exit surface 2d has no optical effect.
  • the focal line FL lies in the focal line region 4 of the body 101 and preferably coincides essentially with the focal line of the exit lens 3.
  • the focal line region 4 is arranged around an edge in the body 101.
  • the HD line is formed by imaging the edge 4, which is a curved line, in particular with a slight curvature or particularly preferably a straight line.
  • the light possibly emerging below the edge 4 via the surface 1a is shaded / blocked or absorbed by the surface 1a lying below the edge 4 being shaded, for example, by an aperture or a dark, for example black or brown coating on the outside, etc. to avoid false / stray light
  • the outer surface 3a of the exit lens 3 of the body 101 is curved outwards in the vertical direction, preferably in such a way that in a central region the exit surface is further forward in the light exit direction than its upper and lower edge region.
  • the exit lens preferably runs in a straight line and is formed, for example, by a cylindrical surface with a straight cross section along an outwardly convex curve, or by a free-form lens which is curved outwards in the vertical direction and is not curved in the horizontal direction.
  • FIG 4 shows the front part of a lighting unit 101 ', from which a lighting unit 101 according to the invention can be derived, as already indicated in principle in the previous figures.
  • Illumination unit 101 'partially shown has an exit lens 3' with a smooth exit surface 3a '.
  • Figure 4a shows a light distribution with a cut-off line, for example a low beam distribution or a part, for example the apron of a low beam distribution. Such a light distribution has a certain width, as in Figure 4a indicated.
  • FIG Figure 5 the front part of one already based on the Figures 1, 1a , 2, 2a and 3, 3a Illumination unit 101 described.
  • the outer surface 3a of the exit lens 3 from a smooth base surface BF (corresponding to the exit surface 3a ' Figure 4 ), which is provided with a groove-shaped structure, the grooves 3b forming the groove-shaped structure running in the vertical direction, that is to say from top to bottom.
  • the outer surface 3a of the exit lens 3 is formed by a groove-shaped structure in a smooth base surface BF, the grooves 3b forming the groove-shaped structure running in a substantially vertical direction, and preferably two grooves 3b lying next to one another in the horizontal direction by one, in particular essentially vertical elevation, which preferably extends over the entire vertical extent of the grooves 3b, are separated.
  • the smooth width of the exit lens BF, 3a 'of the exit lens can often not achieve the required width for the desired light image, in particular not for an apron light distribution of a low-beam light distribution.
  • a structure on the outer surface of the exit lens achieves horizontal blurring of the emerging light beams, as a result of which the desired width of the light distribution can be achieved, as is shown schematically in FIG Figure 5a is shown.
  • the quality of the light distribution is significantly improved since the impression of homogeneity is improved by the structure on the outer surface of the exit lens.
  • Figure 6 and Figure 8 show vertical sections through the body 101, namely an enlarged section of the translucent body between its focal line FL and the light exit surface 3a.
  • Figure 6 shows a second vertical section, which contains a considered point P on the base surface BF
  • Figure 8 shows a second vertical section SE2, in which four exemplary considered points PA, PB, PC and PD lie.
  • non-vertical cutting planes SE1 (these cutting planes SE1 are discussed in more detail below), for example in point P ( Figure 6 ) or according to the sections AA, BB, CC, DD ( Figure 8 ), this results in first basic intersection curves BSK1, which run in a straight line, the first outer surface intersection curves SK1 (which correspond to the course of the lens outer surface in these intersection planes SE1) which result when the outer surface 3a is cut with these first intersection planes SE1 have a sinusoidal shape.
  • the smooth base surface is a conceptual construct, with reference to which the outer surface actually realized is described.
  • the first, non-vertical cutting planes SE1 are a large number of such non-vertical cutting planes, which are still precisely defined below.
  • Figure 7 shows such an exemplary first sectional plane SE1 in which the point P lies, which is normal to the tangential plane TE in the point P ( Figure 6 ), for a general illustration of the relationships.
  • the outer surface of the lens is shown in relation to a first basic section curve BSK1.
  • the basic intersection curve BSK1 is a straight line with the parameter x along this straight line BSK1.
  • the outer lens contour is a first outer surface section curve SK1, which in this example is proportional to sin (k ⁇ x).
  • Figure 8 shows a section along a second, vertical sectional plane SE2 parallel to the optical axis Z, with the four points PA, PB, PC and PD considered by way of example.
  • first section planes SE1 are shown
  • the corresponding courses of the resulting second outer surface section curves SK2 for the four selected section planes SE1 are shown in FIGS Figures 9a - 9d shown.
  • the sections show twice the amplitude, i.e. the distance between maximum and minimum deflection.
  • typical values for the period length T [mm] are in a range up to 2.50 mm, preferably up to 2.00 mm. In particular, preferred values are between 0.10 mm to 2.00 mm, for example between 0.25 mm and 0.75 mm.
  • Preferred values for the maximum amplitude A 0 [ ⁇ m], regardless of the embodiment shown, are in a range from 25 ⁇ m to 350 ⁇ m, a typical value is 50 ⁇ m.
  • Figure 8 also shows (as well as Figure 6 ) that the second basic cutting curves BSK2, which result when cutting the smooth base surface BF with the second, vertical cutting planes SE2, which run parallel to an optical axis Z of the exit lens 3, are curved, in particular curved outwards, preferably the second basic intersection curves BSK2 are continuous.
  • the second outer surface intersection curves SK2 that result when the outer surface 3a is cut with defined second cutting planes SE2 connect points of the outer surface 3a with a maximum distance from the base surface BF.
  • the normal distance of the second outer surface intersection curve SK2 to the second basic intersection curve BSK2 can be seen as a function A (s) of a parameter s which determines the position on the second base -Section curve BSK2 indicates represent.
  • the second sectional plane is a vertical sectional plane through the smooth base surface BF, which runs parallel to the optical axis Z (or through this optical axis Z) and in which the point P under consideration lies.
  • the first cutting planes SE1 enclose an angle of 90 ° with the second basic cutting curve BSK2.
  • a typical value for the parameter K is in the range from 1.2 to 1.45, preferably around 1.33.
  • a s PA A 0 * K - 1 > 0
  • a sinusoidal groove optic is provided in summary, the sine function being normal to the lens surface, ie the smooth base surface of the exit lens.
  • the period preferably remains unchanged, while preferably the groove depth (amplitude), in particular linear, of a certain initial value A 0 (with this value the width of the light distribution can be set) on the upper edge of the light exit surface to a value of zero on the lower edge of the Lens changed. It can thus be achieved that the light distribution widens as desired, and surprisingly it has also been found that the light-dark boundary does not bend outwards, even with a straight-line focal line of the translucent body.
  • Figure 11 shows a lighting device comprising four lighting units 100 according to the invention, which have a structure described above.
  • the optical bodies of the individual lighting units 100 like the light sources 1, are arranged horizontally next to one another.
  • the optic bodies preferably form a common one-piece optic body 1101.
  • the exit surfaces of the exit lenses 3 form a continuous surface, which represent a straight line in horizontal sections.
  • Figure 12 shows another such lighting device in a front view, which in principle has a similar structure to that Figure 11 (For example, with a one-piece optic body; the individual optic bodies can also be separate), the lighting device being equipped with six lighting units and thus six exit lenses (again in one piece or separately).
  • a plurality of lighting units according to the invention can be arranged next to one another in a modular manner and / or offset in height, the optical axes of the individual lighting units following a DK. This is possible because the exit lenses can be cut more easily and the corresponding design requirements can be met.
  • the width of the individual lighting unit can be reduced by an oblique trimming of the exit lenses (or the total exit lens, that is the sum of all the individual exit lenses 3) and / or an adaptation to a desired vehicle headlight sweep can take place.

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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)

Claims (15)

  1. Module d'éclairage, destiné à un projecteur de véhicule automobile, pour créer un faisceau lumineux pourvu d'une ligne de coupure, le module d'éclairage (100) comprenant :
    - au moins une source lumineuse (1),
    - au moins un collimateur (2),
    - chaque fois une source lumineuse (1) pour chaque collimateur (2),
    - une lentille de sortie (3) pourvue d'une surface extérieure (3a),
    - une zone de ligne focale (4), laquelle est placée entre l'au moins un collimateur (2) et la lentille de sortie (3),
    l'au moins un collimateur (2) alignant les rayons lumineux (S1) injectés par la source lumineuse (1) qui lui est associée dans le collimateur (2) en un faisceau lumineux de rayons lumineux (S2),
    et des rayons lumineux (S2) du faisceau lumineux qui émerge de l'au moins un collimateur (2) arrivant dans la zone de ligne focale (4),
    et les rayons lumineux (S2) qui émergent de l'au moins un collimateur (2) étant déviés par la lentille de sortie (3) au moins dans la direction horizontale (V), de telle sorte que les rayons lumineux (S3) qui émergent de la lentille de sortie (3) créent une distribution de lumière avec une ligne de coupure, la ligne de coupure résultant en tant que reproduction de la ligne focale (FL) ou de la zone de ligne focale (4) à travers la lentille de sortie (3),
    et
    l'au moins un collimateur (2), la lentille de sortie (3) et la zone de ligne focale (4) étant créés d'un seul tenant en un corps translucide (101) et sur au moins une surface de délimitation (2a) de l'au moins un collimateur (2), les rayons lumineux (S1, S2) qui se propagent dans le corps translucide (101) étant totalement réfléchis,
    l'au moins un collimateur (2) étant conçu et placé de telle sorte que des rayons lumineux (S2) qui émergent de l'au moins un collimateur (2) soient focalisés dans la direction verticale, sur une ligne focale (FL) située dans la zone de ligne focale (4) qui s'écoule en ligne droite, caractérisé en ce que la surface extérieure (3a) de la lentille de sortie (3) est formée d'une structure en forme de rainure dans une surface de base (BF) lisse, les rainures (3b) qui forment la surface en forme de rainure s'écoulant sensiblement dans la direction verticale et chaque fois deux rainures (3b) situées côte à côte dans la direction horizontale étant séparées par une élévation, s'écoulant notamment sensiblement à la verticale, qui s'étend sur toute l'extension verticale des rainures (3b), la profondeur des rainures variant, notamment de manière linéaire, d'une valeur de départ définie sur une arête supérieure de la lentille de sortie à une valeur de zéro sur une arête antérieure de la lentille de sortie, l'au moins un collimateur (2), notamment au moins une surface de délimitation (2a) et / ou une zone d'injection centrale (2b) de l'au moins un collimateur (2) étant conçue ou conçues de telle sorte que dans la direction horizontale, les rayons lumineux qui émergent de l'au moins un collimateur (2) s'écoulent à la parallèle les uns des autres.
  2. Module d'éclairage selon la revendication 1, caractérisé en ce que l'au moins une surface de délimitation (2a) de l'au moins un collimateur (2) est conçue de telle sorte que la lumière totalement réfléchie sur ladite au moins une surface de délimitation (2a) de la source lumineuse (1) associée au collimateur (2) soit émise en convergence dans la direction verticale, de sorte qu'elle soit focalisée sur la ligne focale (FL) ou dans la zone de ligne focale (4) .
  3. Module d'éclairage selon la revendication 1 ou 2, caractérisé en ce qu'une zone d'injection centrale (2b) de l'au moins un collimateur (2) est conçue sous la forme d'une lentille, notamment sous la forme d'une lentille de forme libre (2b'), de telle sorte que de la lumière injectée par l'intermédiaire de la zone d'injection centrale (2b) dans le collimateur (2) soit émise de manière à converger en direction verticale de sorte qu'elle soit focalisée sur la ligne focale (FL) ou dans la zone de ligne focale (4).
  4. Module d'éclairage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que tous les rayons lumineux (S2) émergeant du collimateur (2) sont focalisés en direction verticale sur la ligne focale (FL) ou dans la zone de ligne focale (4).
  5. Module d'éclairage selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il comporte exactement un collimateur (2) avec une source lumineuse (1) associée.
  6. Module d'éclairage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'au moins un collimateur (2) et la lentille de sortie (3) sont placés l'un par rapport à l'autre de telle sorte que de la lumière émergeant de l'au moins un collimateur (2) arrive directement, notamment sans déviation préalable et/ ou réflexion vers la lentille de sortie (3).
  7. Module d'éclairage selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'une surface de lumière émergente (2d) de l'au moins un collimateur (2) est debout sensiblement à la normale sur un axe optique de la lentille de sortie (3).
  8. Module d'éclairage selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'au moins une source lumineuse
    - se situe plus bas que la zone de ligne focale (4) ou que la ligne focale (FL), ou
    - se situe plus haut que la zone de ligne focale (4) ou que la ligne focale (FL), ou
    - se situe à la même hauteur que la zone de ligne focale (4) ou que la ligne focale (FL).
  9. Module d'éclairage selon l'une quelconque des revendications 1 à 8, caractérisé en ce que sur la face inférieure du corps de l'optique (1) deux surfaces extérieures du corps de l'optique (la, lb) convergentes l'une vers l'autre forment une arête du corps (4'), laquelle se situe dans la zone de la ligne focale (FL) ou dans la zone de ligne focale (4) ou forme la zone de ligne focale, de préférence
    la surface extérieure du corps de l'optique (1a) qui fait face à l'au moins un collimateur (2) étant conçue au moins par zones, de préférence sur toute sa zone de manière à absorber la lumière, pour la lumière qui se propage dans le corps de l'optique (1), qui est incidente sur ladite surface extérieure du corps de l'optique (1a).
  10. Module d'éclairage selon l'une quelconque des revendications 1 à 9, caractérisé en ce que les premières courbes de section de base (BSK1) résultant d'une coupe de la surface de base (BF) avec des premiers plans sécants (SE1) non verticaux ont un trajet rectiligne et les premières courbes de section de surface extérieure (SK1) résultant d'une coupe de la surface extérieure (3a) avec lesdits premiers plans sécants (SE1) ont un trajet sinusoïdal, de préférence les premières courbes de section de surface extérieure (SE1) dans les premiers plans sécants (SE1) s'écoulant en rapport de la courbe de section de base (BSK1) du premier plan sécant (SE1) respectif de manière proportionnelle à sinN(k∗x), avec N = 1, 2, 3, ...., x désignant la coordonnée le long de la courbe de section de base (SE1) respective et nulle constante, de préférence
    les passages par zéro des premières courbes de section de surface extérieure (SE1) de forme sinusoïdale se trouvant sur les premières courbes de section de base (BSK1), de préférence
    la valeur de la constante k étant identique pour toutes les premières courbes de section de surface extérieure (SE1).
  11. Module d'éclairage selon l'une quelconque des revendications 1 à 10, caractérisé en ce que les deuxièmes courbes de section de base (BSK2) résultant d'une coupe de la surface de base avec des deuxièmes plans sécants (SE2) verticaux, lesquels s'écoulent à la parallèle d'un axe optique (Z) de la lentille de sortie (3) sont conçus de forme incurvée, notamment incurvée vers l'extérieur, de préférence, les deuxièmes courbes de section de base (BSK2) étant constantes, de préférence
    les deuxièmes courbes de section de surface extérieure (SK2) résultant d'une coupe de surface extérieure (3a) avec des deuxièmes plans sécants (SE2) définis reliant les uns aux autres des points de la surface extérieure (3a) avec un écart maximal par rapport à la surface de base (BF), de préférence
    lors d'une progression de long de la deuxième courbe de section de base (BSK2) dans les plans sécants (SE2) définis, l'écart normal par rapport à la deuxième courbe de section de surface extérieure (SK2) indiquant une fonction A(s) d'un paramètre s, lequel indique la position sur la deuxième courbe de section de base (BSK2), de préférence
    lors d'une progression le long de la deuxième courbe de section de base (BSK2), l'écart normal A(s) s'agrandissant continuellement, de préférence l'écart normal sur un bord inférieur de la surface de base (BF) étant inférieur à celui sur un bord supérieur de la surface de base, l'écart normal A(s) se désignant à titre d'exemple selon la relation A(s) = A0 ∗ (K - s), avec s[0, 1], s = 0 désignant le bord supérieur et s = 1 désignant le bord inférieur, et donnant au résultat K = 1 ou K > 1, A0 étant l'écart normal sur un bord supérieur ou inférieur, de préférence le bord supérieur de la surface de base (BF).
  12. Module d'éclairage selon l'une quelconque des revendications 1 à 11, caractérisé en ce que la surface extérieure (3a) de la lentille de sortie (3) est incurvée vers l'extérieur dans la direction verticale et s'écoule de préférence en ligne droite dans la direction horizontale, et à titre d'exemple est formée d'une surface cylindrique de section transversale droite le long d'une courbe convexe vers l'extérieur, et/ ou
    l'au moins une source lumineuse (1) comprend un ou plusieurs éléments à semi-conducteur, émetteurs de lumière, par ex. une diode électroluminescente ou une pluralité de diodes électroluminescentes, et/ ou par exemple au moins une source de lumière laser comprenant au moins une diode laser avec au moins une couche de conversion.
  13. Dispositif d'éclairage comprenant au moins deux modules d'éclairage selon l'une quelconque des revendications 1 à 12, de préférence le corps translucide (101) des modules d'éclairage se situant côte à côte à l'horizontale et/ ou étant superposés.
  14. Dispositif d'éclairage selon la revendication 13, caractérisé en ce que les corps translucides (101) des au moins deux modules d'éclairage sont reliés l'un à l'autre, de préférence sont conçus de préférence d'un tenant.
  15. Projecteur de véhicule automobile pourvu d'au moins un module d'éclairage selon l'une quelconque des revendications 1 à 12 ou d'au moins un dispositif d'éclairage selon la revendication 13 ou 14.
EP17723237.8A 2016-04-29 2017-04-26 Dispositif d'illumination pour phare de véhicule avec une distribution de lumière ayant une coupure Active EP3449178B1 (fr)

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ATA50394/2016A AT518557B1 (de) 2016-04-29 2016-04-29 Beleuchtungseinheit für einen Kraftfahrzeugscheinwerfer zum Erzeugen eines Lichtbündels mit Hell-Dunkel-Grenze
PCT/AT2017/060107 WO2017185118A1 (fr) 2016-04-29 2017-04-26 Unité d'éclairage destinée à un phare de véhicule automobile pour générer un faisceau de lumière à coupure clair-obscur

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AT518557B1 (de) 2018-04-15
AT518557A1 (de) 2017-11-15
CN109073184B (zh) 2021-09-07
KR102195489B1 (ko) 2020-12-30
KR20180132149A (ko) 2018-12-11
EP3449178A1 (fr) 2019-03-06
CN109073184A (zh) 2018-12-21

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