EP4071402A1 - Beleuchtungseinrichtung für fahrzeuge, insbesondere mit leds - Google Patents

Beleuchtungseinrichtung für fahrzeuge, insbesondere mit leds Download PDF

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Publication number
EP4071402A1
EP4071402A1 EP22166515.1A EP22166515A EP4071402A1 EP 4071402 A1 EP4071402 A1 EP 4071402A1 EP 22166515 A EP22166515 A EP 22166515A EP 4071402 A1 EP4071402 A1 EP 4071402A1
Authority
EP
European Patent Office
Prior art keywords
lighting
face
lighting device
light
light sources
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22166515.1A
Other languages
English (en)
French (fr)
Other versions
EP4071402B1 (de
Inventor
Alessandro VAIRA
Francesca CLERICI
Roberto Cerone
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.)
Marelli Automotive Lighting Italy SpA
Original Assignee
Marelli Automotive Lighting Italy SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Marelli Automotive Lighting Italy SpA filed Critical Marelli Automotive Lighting Italy SpA
Publication of EP4071402A1 publication Critical patent/EP4071402A1/de
Application granted granted Critical
Publication of EP4071402B1 publication Critical patent/EP4071402B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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]
    • 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
    • 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
    • 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
    • F21S41/29—Attachment thereof
    • F21S41/295—Attachment thereof specially adapted to 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
    • 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
    • F21S43/10—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
    • F21S43/15—Strips of light sources
    • 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
    • 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
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
    • 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
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/241—Light guides characterised by the shape of the light guide of complex shape
    • 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
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
    • 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
    • F21S43/235—Light guides
    • F21S43/247—Light guides with a single light source being coupled into the light guide
    • 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
    • F21S43/235—Light guides
    • F21S43/249—Light guides with two or more light sources being coupled into the light guide
    • 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
    • F21S43/20—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
    • F21S43/27—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—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
    • F21S43/315—Optical layout thereof 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
    • 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
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/20—Illuminance distribution within the emitted light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting device for vehicles, in particular a signalling device for vehicles, for example motor vehicles, such as a lamp, wherein the light source consists of a LED or a LED battery.
  • the lighting body is formed by a blade-shaped flat light guide, rectilinear or more often curved, known with the term "light blade” or "blade of light.”
  • a series of light sources arranged side-by-side and generally formed by LEDs are activated, simultaneously or sequentially, and feed light into a first end of the blade-shaped light guide; the light is then emitted through a second end of the light guide, opposite to the first end.
  • a lighting device of this type is illustrated in EP3248840 .
  • This type of solution has the drawback that the light emitted from the second end is not homogeneous, at worst to the point that it is still possible to distinguish individual light sources.
  • This drawback can be attenuated, and even suppressed, by increasing the number of light sources arranged side-by-side and/or by extending the depth of the light blade, i.e. the distance between the first and second ends of the light guide constituting the lighting body.
  • the object of the present invention is to provide a lighting device for vehicles, in particular for use in motor vehicle lamps, in which the light source is formed by a plurality of LEDs and which has not the drawbacks of the state of art, in particular that can provide high uniformity and homogeneity of output lighting, together with high compactness, therefore with small dimensions, relatively low manufacturing and assembly costs and high shape adaptability, so as to be able to equip vehicles with stylistic profiles that are very different from each other, but operating on the basis of a single operation principle.
  • the present invention relates to a lighting device for vehicles having the characteristics as set forth in the appended claims.
  • the lighting device for vehicles according to the invention consists preferably, but not exclusively, of a signalling device usable in a motor vehicle headlight or lamp.
  • the lighting device of the invention comprises a plurality of first light sources arranged side-by-side, spaced from one another along a predetermined trajectory, with a constant or non-constant pitch, and a first lighting body substantially blade-shaped and delimited longitudinally between a front face and a rear face thereof, opposite to one another, the first lighting body being configured to receive light in the form of a plurality of light beams from the first light sources on the side of the rear face (working in TIR - Total Internal Reflection), which is arranged parallel to the aforementioned predetermined trajectory, and to emit light through the front face.
  • first air lenses are present, each being arranged substantially at a first light source, and each being composed of a first and second collimating optical elements.
  • the front face of the first lighting body is provided with a layer of divergent optics configured to receive a plurality of collimated light beams by the first air lenses and transform them into divergent light beams so as to form on the front face of the first lighting body a plurality of second virtual light sources arranged side-by-side and spaced from one another with a pitch, whether constant or not, smaller than the one present between the first light sources.
  • the lighting device of the invention further comprises a blade-shaped second lighting body and delimited longitudinally between a front face thereof and a rear face thereof, the latter facing and being parallel to the front face of the first lighting body and being spaced therefrom by a second air lens.
  • the first and second lighting bodies are configured to constitute total internal reflection light guides between the respective rear and front faces.
  • the first light sources each consist of a LED or a LED battery.
  • LED battery means the set of at least two adjacent LEDs having different lighting functions and/or colours.
  • the first lighting body is delimited between its front and rear faces by an upper face and by an opposite lower face, both flat, and the first light sources are arranged on the side of the upper face and so as to emit the plurality of light beams transversely to the upper face and towards the rear face.
  • the rear face of the first lighting body is defined by a plurality of curved refractive surfaces, preferably of a parabolic type, each facing a single first light source and configured to collect the plurality of light beams emitted by the first light sources to collimate them towards the front face in a direction transverse, preferably perpendicular, to the upper and lower faces.
  • the first and second optical elements of each first air lens are thus configured to collimate the plurality of light beams refracted by the rear face in a direction perpendicular to the collimation direction determined by said curved refractive surfaces delimiting the rear face.
  • the upper and lower faces are arranged substantially horizontally.
  • the optical elements of the first air lenses perform a double collimation (complex collimation) in a horizontal direction.
  • the LEDs of the first light sources are arranged offset from one another in a direction of light propagation between the rear and front faces of the first lighting body and are arranged discretely aligned along the aforementioned predetermined trajectory and all at the same distance from the front face of the first lighting body.
  • the LEDs are preferably carried by a single "ladder”- or “zigzag”-shaped printed circuit configured to position the stepped LEDs along the aforementioned predetermined trajectory, and which is fixed on the upper face of the first lighting body.
  • the printed circuit could have any other convenient shapes.
  • the first optical element of each first air lens is constituted by a curved, concave or convex lens; the second optical element of each first air lens is instead constituted by a lens even only partially curved, in particular curved at least at its respective opposite ends, which are arranged transversely to the direction of light propagation between the rear and front faces of the first lighting body.
  • the layer of divergent optics is formed by a plurality of preferably cylindrical optics arranged side-by-side and adjacent, parallel to one another, in a direction transverse, preferably perpendicular, to the respective upper and lower faces.
  • the second lighting body is fixed integrally in front of the first lighting body and, according to a first embodiment, is obtained integral in a one piece with the first lighting body for moulding in a synthetic plastic resin; in a second embodiment, the second lighting body is obtained as an element independent of the first lighting body but mechanically connected to the latter, preferably at opposite transversal ends of the first and second lighting bodies which flank on opposite sides the light sources.
  • the invention also extends to a vehicle comprising such a lighting device.
  • reference number 1 as a whole indicates a lighting device for a known vehicle, in particular a motor vehicle, not illustrated for simplicity.
  • the lighting device 1 is a signalling device that can be inserted/integrated into a headlight or lamp, otherwise known and not illustrated for simplicity, or mounted in a specific seat directly obtained on the body of the aforementioned known and not illustrated vehicle.
  • the lighting device 1 comprises a plurality of first light sources 2, only two of which are shown, and only schematically as blocks, in figures 1 and 5 .
  • first light sources 2 are illustrated, as will be seen, in the correct assembling position.
  • the light sources 2 are instead illustrated arranged in a fictitious position, offset with respect to the correct assembling position, since in such correct assembling position they would not be visible.
  • the light sources 2 are arranged side-by-side and spaced from one another along a predetermined trajectory T, straight or curved, with fixed or variable curvature, depending on the stylistic needs to be met.
  • the light sources 2 are spaced from one another with a preferably constant pitch, but if necessary, the pitch could also be variable, i.e. the distance between two adjacent light sources 2 could not always be the same.
  • the light sources 2 each consist of a LED or a LED battery.
  • LED battery means the set of at least two adjacent LEDs, for example in pairs, arranged in the same position along the trajectory T, for example having different lighting functions and/or colours, as will be seen.
  • the LEDs 2 are carried by a single substantially rigid, "ladder”- or “zigzag”-shaped printed circuit 3 (or printed circuit board) so as to extend as a whole parallel to the trajectory T, but in a discrete manner, i.e. in portions, and configured to position the stepped LEDs 2 along the aforementioned predetermined trajectory T.
  • the printed circuit 3 could also have any other convenient shapes.
  • the lighting device 1 further comprises a first lighting body 4 substantially blade-shaped and longitudinally delimited between a front face 5 thereof and a rear face 6 thereof, opposite one another.
  • the terms "front” and “rear” are understood as referred to the positions assumed in use by the faces 5 and 6 on the vehicle, where the rear face 6 faces the interior of the vehicle, whereas the front face 5 faces the exterior of the vehicle.
  • the faces 5 and 6 are further arranged in a generally vertical direction, i.e. perpendicular or transversely inclined to the horizontal plane.
  • the first lighting body 4 is configured to receive the light in the form of a plurality of light beams 7 ( figure 5 ) from the first light sources 2 from the side of the rear face 6, which is arranged as a whole parallel to the aforementioned predetermined trajectory T, and to emit light through the front face 5.
  • first air lenses 8 each arranged substantially at a first light source 2 and each composed of a first collimating optical element 9 and a second collimating optical element 10.
  • the front face 5 of the first lighting body 4 is provided with a layer of divergent optics 11 configured to receive ( figure 5 ) a plurality of collimated light beams 12 by the first air lenses 8 and transform them into divergent light beams 13 so as to form on the front face 5 of the first lighting body 4 a plurality of second virtual light sources 14 (schematized with a dot in figure 5 ) arranged side-by-side and spaced from one another with a pitch, whether constant or not, smaller than the one present between the first light sources 2.
  • the lighting body 4 is configured with the air lenses 8 and its faces 5 and 6 to create, from the real light sources 2, a plurality of virtual light sources 14 arranged much closer together than the light sources 2, which can thus be reduced in number and more spaced from one another than in known art, with great economic savings and constructive simplification.
  • the lighting device 1 of the invention further comprises a blade-shaped second lighting body 15 longitudinally delimited between a front face 16 thereof and a rear face 18 thereof (where the terms “front” and “rear” have to be understood as specified above) .
  • the face 18 is arranged facing and parallel to the front face 5 of the first lighting body 4 and is spaced therefrom by a second air lens 20.
  • the first and second lighting bodies 4 e 15 are configured to constitute total internal reflection light guides between the respective rear and front faces 5,6 and 16,18, respectively.
  • the first lighting body 4 is further delimited between its front face 5 and rear face 6 by an upper face 21 ( figure 3 ) and by an opposite lower face 22 ( figure 1 ), both flat.
  • the rear face 6 of the first lighting body 4 is defined by a plurality of curved refractive surfaces 23, preferably of a parabolic type, each facing a respective first light source 2 and configured to collect the plurality of light beams 7 emitted by the first light sources 2 ( figure 5 ) to collimate them towards the front face 5 in a direction transverse, preferably perpendicular, to the upper face 22 and the lower face 23.
  • the curved surfaces 23 are also arranged longitudinally stepped/offset side-by-side to one another (i.e. in the direction of emission of the light beams 7 and which goes from the rear face 6 to the front face 5) as the light sources 2 mounted on the "ladder"-shaped printed circuit 3, so as to discretely follow (in the mathematical meaning of the term) the trajectory T.
  • the light sources 2 are further arranged on the side of the upper face 22 and so as to emit the plurality of light beams 7 transversely to the upper face 22 and towards the rear face 6.
  • the printed circuit 3 is carried integrally by the upper face 22.
  • the first and second optical elements 9, 10 of each first air lens 8 are instead configured, according to a further aspect of the invention, to collimate the plurality of light beams 7, already refracted by the rear face 6, in a direction perpendicular to the direction of the previous collimation determined for each beam 7 by a respective curved refractive surface 23 locally delimiting the rear face 6 at each light source or LED 2.
  • the upper face 21 and the lower face 22 are arranged substantially horizontally.
  • each curved refractive surface 23 collimates the light beams 7 emitted by the LEDs constituting the first light sources 2 in a vertical direction
  • the optical elements 9, 10 of the first air lenses 8 perform a double collimation (complex collimation - that makes light homogeneous) in a horizontal direction.
  • the LEDs 2 constituting the first light sources are arranged, as already indicated, offset from one another in the direction of light propagation between the rear face 6 and the front face 5 of the lighting body 4 and are arranged discretely aligned along the aforementioned predetermined trajectory T and preferably all at a same distance from the front face 5 of the first lighting body 4, where possible based on the envisaged stylistic shape therefor.
  • the first optical element 9 of each first air lens 8 is constituted by a curved, concave or convex lens; the second optical element 10 of each first air lens 8 is instead constituted by a lens even only partially curved, in particular curved at least at its respective opposite lateral ends 24 ( figure 4 ).
  • the lateral ends 24 are arranged transversely to the direction of light propagation between the rear face 6 and the front face 5 of the first lighting body 4.
  • the layer of divergent optics 11 is formed by a plurality of cylindrical optics 11 arranged side-by-side and adjacent, parallel to one another, in a direction transverse, preferably perpendicular, to the respective upper face 21 and lower face 22 of the lighting body 4.
  • the second lighting body 15 is fixed integrally in front of the first lighting body 4 and, according to a first embodiment of the invention, is obtained integral in a one piece with the first lighting body 4, having been moulded together with it in a one piece and with a single operation in a synthetic plastic resin.
  • the second lighting body 15 is obtained as an independent element from the first lighting body 4, but mechanically connected to the latter, preferably at opposite transversal ends 25 of the first and second lighting bodies 4 and 15, which flank the light sources 2 from opposite sides (not illustrated in figure 6 , only a lateral part of the printed circuit board 3 is visible).
  • the lighting device of the invention may comprise further optical elements, if necessary.
  • the front face 16 of the second lighting body 15 may be provided with lenses or prisms or holograms 26 ( figures 5 and 6 ).
  • other additional optical elements may be provided on the rear face 18, at the air lens 20.
  • the LEDs 2 can be easily collected on a single rigid printed circuit 3.
  • the invention also extends to a vehicle comprising one or more lighting devices 1 or 100.

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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)
EP22166515.1A 2021-04-09 2022-04-04 Beleuchtungseinrichtung für fahrzeuge, insbesondere mit leds Active EP4071402B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000008909A IT202100008909A1 (it) 2021-04-09 2021-04-09 Dispositivo di illuminazione per veicoli, in particolare a led

Publications (2)

Publication Number Publication Date
EP4071402A1 true EP4071402A1 (de) 2022-10-12
EP4071402B1 EP4071402B1 (de) 2025-09-17

Family

ID=77021790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22166515.1A Active EP4071402B1 (de) 2021-04-09 2022-04-04 Beleuchtungseinrichtung für fahrzeuge, insbesondere mit leds

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1895228A1 (de) * 2006-09-01 2008-03-05 Valeo Vision Vorrichtung zur Beleuchtung oder Signalisierung vom Typ Hochleistungs-Lichtwellenleiter für Kraftfahrzeuge
WO2014203061A2 (en) * 2013-06-18 2014-12-24 Koito Manufacturing Co., Ltd. Vehicular lamp
EP2818791A1 (de) * 2013-06-26 2014-12-31 Automotive Lighting Reutlingen GmbH Kraftfahrzeugbeleuchtungseinrichtung mit einer Einkoppeloptik und einer Transport- und Umformoptik
JP2015167124A (ja) * 2014-02-13 2015-09-24 株式会社小糸製作所 車両用灯具
JP2015201278A (ja) * 2014-04-04 2015-11-12 株式会社小糸製作所 車両用灯具
EP3248840A1 (de) 2016-05-25 2017-11-29 Automotive Lighting Italia S.p.A. Fahrzeugsbeleuchtungseinrichtung
EP3502551A1 (de) 2017-12-19 2019-06-26 Automotive Lighting Italia S.p.A. Beleuchtungsvorrichtung für fahrzeuge
US20190271447A1 (en) * 2018-03-05 2019-09-05 Hyundai Motor Company Light guide for vehicle
CN112178585A (zh) * 2020-09-16 2021-01-05 马瑞利汽车零部件(芜湖)有限公司 避免外透镜做可视角花纹的厚壁件光学系统

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1895228A1 (de) * 2006-09-01 2008-03-05 Valeo Vision Vorrichtung zur Beleuchtung oder Signalisierung vom Typ Hochleistungs-Lichtwellenleiter für Kraftfahrzeuge
WO2014203061A2 (en) * 2013-06-18 2014-12-24 Koito Manufacturing Co., Ltd. Vehicular lamp
EP2818791A1 (de) * 2013-06-26 2014-12-31 Automotive Lighting Reutlingen GmbH Kraftfahrzeugbeleuchtungseinrichtung mit einer Einkoppeloptik und einer Transport- und Umformoptik
JP2015167124A (ja) * 2014-02-13 2015-09-24 株式会社小糸製作所 車両用灯具
JP2015201278A (ja) * 2014-04-04 2015-11-12 株式会社小糸製作所 車両用灯具
EP3248840A1 (de) 2016-05-25 2017-11-29 Automotive Lighting Italia S.p.A. Fahrzeugsbeleuchtungseinrichtung
EP3502551A1 (de) 2017-12-19 2019-06-26 Automotive Lighting Italia S.p.A. Beleuchtungsvorrichtung für fahrzeuge
US20190271447A1 (en) * 2018-03-05 2019-09-05 Hyundai Motor Company Light guide for vehicle
CN112178585A (zh) * 2020-09-16 2021-01-05 马瑞利汽车零部件(芜湖)有限公司 避免外透镜做可视角花纹的厚壁件光学系统

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CN115199981A (zh) 2022-10-18
EP4071402B1 (de) 2025-09-17
IT202100008909A1 (it) 2022-10-09

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