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EP4372270A1 - Dispositif d'éclairage et/ou de signalisation automobile à écran amélioré - Google Patents

Dispositif d'éclairage et/ou de signalisation automobile à écran amélioré Download PDF

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Publication number
EP4372270A1
EP4372270A1 EP22208610.0A EP22208610A EP4372270A1 EP 4372270 A1 EP4372270 A1 EP 4372270A1 EP 22208610 A EP22208610 A EP 22208610A EP 4372270 A1 EP4372270 A1 EP 4372270A1
Authority
EP
European Patent Office
Prior art keywords
lighting
light rays
outlet wall
light
signaling device
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.)
Withdrawn
Application number
EP22208610.0A
Other languages
German (de)
English (en)
Inventor
Alessandro SACCA'
Federico IANNACONE
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
Priority to EP22208610.0A priority Critical patent/EP4372270A1/fr
Publication of EP4372270A1 publication Critical patent/EP4372270A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—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
    • F21S43/2605—Refractors
    • F21S43/2621—Refractors characterised by the properties of the light beam shaping surface
    • F21S43/26231—Refractors characterised by the properties of the light beam shaping surface collimating, focusing, condensing or projecting beams, e.g. projection lenses or Fresnel 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
    • F21S41/2805—Cover glass
    • 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
    • F21S43/2605—Refractors
    • F21S43/2621—Refractors characterised by the properties of the light beam shaping surface
    • F21S43/26271—Refractors characterised by the properties of the light beam shaping surface using micro-optics, e.g. micro-lenses or micro-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
    • 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
    • F21S43/2605—Refractors
    • F21S43/2641—Refractors or refracting portions characterised by their relative arrangement, e.g. parallel refractors
    • F21S43/26411—Two or more successive 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
    • 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
    • F21S43/265—Transparent cover plates, e.g. for protecting the interior of the signalling devices against environmental influences
    • 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
    • F21S43/401—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 the refractors and the reflectors being distinct parts
    • 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
    • F21S43/50—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers

Definitions

  • the present invention relates to an automotive lighting and/or signaling device with an improved screen device.
  • automotive lighting and/or signaling device is used herein in a very broad sense to comprise an either rear or front automotive light, the latter also referred to as a headlight or headlamp.
  • an automotive light is to provide a signal or make the roadbed visible for the driver.
  • the automotive light is a device intended to provide at least one lighting and/or signaling function of the vehicle.
  • Lighting and/or signaling functions of the vehicle include, for example, the position light, the turn signal light, the brake light, the rear fog lamp, the reversing light, the dipped beam light, the high beam light, the daytime running light, and further similar lights typical of automotive light assemblies.
  • the device can also perform an aesthetical function, such as lighting devices that show logos and the like, which can be located both outside and inside the vehicle.
  • the lighting device takes an aesthetical function when it is not activated, i.e., when it does not emit light beams and, as needed, if it is activated, it also takes the lighting/signaling function. This is the case of devices having an overall opaque, typically black aspect when OFF, so as to conceal the lighting function from an outside observer.
  • Such known devices comprise outer black or opaque lenticular bodies which, when OFF, appear as dark plates and conceal the presence of inner light sources from the outside observer.
  • Such outer lenticular bodies have an overall dark wall (for example, blackened by painting, pad printing, hot pressing, film overmolding and similar techniques) which acts as a mask interspersed with thin transparent windows which instead allow the crossing by the light beams emitted by light sources inside the device.
  • Such windows are very thin since they have a thickness in the order of a few tenths of a millimeter: for this reason, they are not usually visible to an outside observer when the inner light sources are OFF.
  • the light beams can propagate outside the device through the mentioned windows so as to be visible to an outside observer and to serve the signaling and/or lighting function thereof.
  • the set of lit dots forms the light image or pattern of the lighting and/or signaling device.
  • the light rays emitted by the light sources are first collimated and then concentrated towards said windows to pass the lenticular body and leave the lighting and/or signaling device.
  • the accuracy of shapes, dimensions and positions of the windows obtained on the wall of the lenticular body is a critical item which is difficult to achieve and industrialize, resulting in the light patterns emitted upon the activation of the light sources having inaccuracies, inhomogeneity and blurring, which make the optical system not very efficient and aesthetically unacceptable for a user.
  • reference numeral 4 indicates, as a whole, a lighting and/or signaling device, such as an automotive light, to which the following disclosure will refer without however losing in generality.
  • the term "lighting and/or signaling device” can indifferently mean either an automotive rear light or an automotive front light, the latter also referred to as a headlight or headlamp, comprising an external light of the vehicle serving a lighting and/or signaling function, such as a position light, for example, which can be a front or rear or side position light, a turn signal light, a brake light, a rear fog lamp, a high beam light, a dipped beam light, and the like.
  • a position light for example, which can be a front or rear or side position light, a turn signal light, a brake light, a rear fog lamp, a high beam light, a dipped beam light, and the like.
  • the device can comprise, in the signaling function thereof, the possibility to send light signals, logos, but also words and light messages of any kind.
  • the device can perform a merely aesthetical function, as in the case of lighting devices showing logos and the like, which can be arranged both outside and inside the vehicle.
  • the lighting and/or signaling device 4 comprises a container body or hollow housing 8, usually made of a polymer material, such as acrylonitrile butadiene styrene, or ABS, for example, which typically allows fixing the lighting and/or signaling device 4 to the related vehicle or to any type of support.
  • a polymer material such as acrylonitrile butadiene styrene, or ABS, for example, which typically allows fixing the lighting and/or signaling device 4 to the related vehicle or to any type of support.
  • the container body or housing 8 can have any shape and size, as well as position: for example, the container body 8 can also not be directly associated with the body or other external mountings of the associable vehicle.
  • the container body 8 delimits a containment seat 12 which accommodates a plurality of components of said lighting and/or signaling device.
  • the containment seat 12 accommodates at least one light source 16 arranged and supported inside said containment seat 12.
  • the at least one light source 16 preferably comprises a LED or mini LED light source adapted to emit a light beam, typically with a Lambertian distribution, comprising a plurality of light rays 20.
  • a screen device 24 acting as a lenticular body can be placed to the container body 8 to at least partially close it and so as to close said containment seat 12 which accommodates the light source 16.
  • the screen device or lenticular body 24 is outside the lighting and/or signaling device 4 so as to define at least one outer wall of the lighting and/or signaling device directly subject to the atmosphere, integrating with the line of the car when the container body 8 is firmly recessed in the chassis of the vehicle.
  • the material of the screen device or lenticular body 24 is of the polymer type, i.e., a resin such as PMMA (poly methyl methacrylate), PC (polycarbonate) and the like. Said material of the lenticular body or screen device 24 is thus at least partially transparent or semitransparent or translucent, one or more opaque portions also possibly being included.
  • the screen device 24 can also be mechanically distinct from the lenticular body; in other words, it is possible that the lighting and/or signaling device can also include a lenticular body which is distinct from the screen device 24, to cover the latter. In other words, the screen device 24 is accommodated inside a chamber consisting of the container body 8 closed by the lenticular body.
  • the lighting and/or signaling device 4 for vehicles further comprises at least one collimator device 28 contained in the container body 8, i.e., inside the chamber of device 4, and configured to receive said light rays 20 emitted by said at least one light source 16 and to collimate them parallel to a main propagation direction X-X.
  • Said collimation direction is substantially parallel to the main propagation direction X-X.
  • Said previously collimated light rays 20 are to be sent to said screen device 24, as better described below. It is important for said light rays 20 to be collimated beforehand so they can be effectively and accurately directed towards the screen device 24, as better described below.
  • said collimator device 28 comprises a Fresnel lens and/or a collimator lens and/or a collimator reflector.
  • a Fresnel lens When using a Fresnel lens, the well-known advantage of decreasing the thickness of the entire optical architecture arises.
  • said collimator device 28 comprises a reflector.
  • Said reflector can comprise, for example, a parabolic or hyperbolic profile.
  • said at least one screen device 24 intercepts the light rays 20 collimated by the collimator device 28.
  • the screen device 24 which can be arranged to close the container body 8, extends from an inlet wall 32 facing the collimator device 28 to an outlet wall 36 opposite to the collimator device 28, along said main propagation direction X-X.
  • the outlet wall 36 has alternating screened portions 40 being opaque to said light rays 20, and windows 44 being transparent to said light rays 20.
  • the screened portions 40 are opaque and thus cannot be crossed by said light rays 20; therefore, they are perceived by an outside observer as black or darkened portions even when the light sources 16 are OFF.
  • the light sources 16 are activated, a homogeneous lighting surface is formed due to the close arrangement of the windows, as better described below.
  • said windows 44, or transparent portions are obtained on recesses 48 of the outlet wall 36, misaligned with respect to the screened portions 40 along said main propagation direction X-X.
  • said recesses 48 on the outlet wall 36 are arranged at a constant pitch P along a vertical direction Y-Y, perpendicular to said main propagation direction X-X.
  • said recesses 48 on the outlet wall 36 can also be arranged at a varying pitch P along said vertical direction Y-Y, perpendicular to said main propagation direction X-X.
  • the recesses 48 can have various geometries.
  • said recesses 48 can also have a "U”, "V” and/or parabolic profile with respect to a section plane perpendicular to said main propagation direction X-X.
  • said recesses 48 have a minimum depth 64 or distance from the screened portions 40 of the outlet wall 36, along the main propagation direction X-X, more or less equal to 2 mm.
  • the pitch of the windows 44 i.e., the pitch of the screened portions 40
  • the screen device 24 appears as a dark surface, for example black in color, when the light source 16 is OFF, or contrarily, as a substantially homogeneous lighting surface when the light source 16 is ON, due to the fact that the windows 44 are sufficiently close to one another and in any case at a distance below the angular resolution of the human eye.
  • an alternation i.e., the pitch
  • between the windows 44 i.e., the screened portions 40
  • the inlet wall 32 of the screen device 24 preferably comprises at least one concentration means 52 of the light beam (incoupling) configured to direct and concentrate, in said windows 44, the collimated light rays 20 incident thereon.
  • each of said concentration means 52 of the light beam is sized and positioned so as to concentrate and direct, in a corresponding window 44, all the light rays 20 incident thereon. In other words, due to the concentration means, there are no light rays 20 being incident on the screened portions 40.
  • a concentration means 52 of the light beam (incoupling) is provided at each recess 48 on the outlet wall 36. Thereby, the lighting efficiency of the lighting and/or signaling device 4 is increased.
  • said concentration means 52 of the light beam (incoupling) has a convex profile towards the light rays 20 incident thereon, and a concave profile towards said corresponding recess 48.
  • a concentration means 52 of the light beam having a concave profile towards the light rays 20 incident thereon, and a convex profile towards said corresponding recess 48, can also be used.
  • a concentration means 52 of the light beam having a curved lenticular profile can be used.
  • a plurality of light sources 16 is provided, where each light source 16 is associated with a corresponding collimator device 28 and a corresponding screen device 24, and where each light source 16, with the corresponding collimator device 28 and screen device 24, is accommodated in a seat 56 optically separated from the other adjacent seats by means of internal separating partitions 60.
  • the screen devices 24 and the collimator devices 28 are counter-shaped to one another and the respective seats 56 delimited by the internal separating partitions 60.
  • the lighting and/or signaling device 4 consists of a plurality of independent modules, having a hexagonal shape as shown in Figures 1-3 , for example, each module comprising a light source 16, a collimator device 28, and a screen device 24 and being delimited by said internal separating partitions 60.
  • the hexagonal geometry is merely indicative and not limiting.
  • the screen device 24, comprising the inlet wall 32 provided with the light beam concentration means 52 and the outlet wall 36 provided with the windows obtained on recesses 48 of the outlet wall 36, is made in one piece from a material which is transparent to the light rays.
  • the inlet wall 32 provided with the light beam concentration means 52 and an outlet wall 36 provided with the windows 44 obtained on recesses 48 of the outlet wall 36 itself are made in one piece with each other.
  • the windows 44 are obtained by molding: thereby, not only is the accurate production/geometry of the windows 44 always ensured, but also the correct mutual alignment between the collimated rays 20 and the windows 44 themselves, i.e., the correct alignment between each concentration means 52 and the corresponding window 44, i.e., the respective recess 48. Therefore, the solution according to the present invention is capable of providing accurate, sharp, and homogeneous light patterns.
  • said screened portions 40 are thus obtained by applying a layer 72 which is opaque to said light rays 20.
  • said opaque layer 72 is obtained by pad printing or painting or molding the outlet wall 36 of the screen device 24.
  • said method comprises the steps of:
  • the present invention allows overcoming the drawbacks of the prior art.
  • a lighting and/or signaling device can be manufactured, which has plates, i.e., dark or opaque portions concealing the presence of inner lighting devices from an outside observer, when deactivated.
  • the lighting and/or signaling device allows emitting light beams according to very sharp and accurate patterns or designs.
  • the solution according to the present invention is capable of providing accurate, sharp and homogeneous light patterns when the light sources are activated. If the light sources are OFF, the outside observer will instead perceive a dark and homogeneous plate.
  • the accuracy in manufacturing the windows and the opaque portions is ensured by the molding and offset between the inlet wall and the outlet wall of the screen device. Indeed, due to said offset or misalignment, the opaque portions can be darkened, for example with pad printing or painting or hot pressing techniques, in a highly accurate manner without affecting the windows which are retracted instead and thus not affected by the step of applying the darkening layer.
  • the method for manufacturing a lighting and/or signaling device according to the invention is also industrially repeatable and allows obtaining constant and repeatable results in terms of accuracy and sharpness of the light patterns generated by activating the light sources.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP22208610.0A 2022-11-21 2022-11-21 Dispositif d'éclairage et/ou de signalisation automobile à écran amélioré Withdrawn EP4372270A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22208610.0A EP4372270A1 (fr) 2022-11-21 2022-11-21 Dispositif d'éclairage et/ou de signalisation automobile à écran amélioré

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22208610.0A EP4372270A1 (fr) 2022-11-21 2022-11-21 Dispositif d'éclairage et/ou de signalisation automobile à écran amélioré

Publications (1)

Publication Number Publication Date
EP4372270A1 true EP4372270A1 (fr) 2024-05-22

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Application Number Title Priority Date Filing Date
EP22208610.0A Withdrawn EP4372270A1 (fr) 2022-11-21 2022-11-21 Dispositif d'éclairage et/ou de signalisation automobile à écran amélioré

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241388A (en) * 1978-05-30 1980-12-23 Lucas Industries Limited High contrast lamp assembly
FR2576565A3 (fr) * 1985-01-28 1986-08-01 Comind Spa Feu de signalisation a lumiere coloree pour vehicules automobiles
DE9002447U1 (de) * 1989-03-03 1990-05-03 Valeo Vision, Bobigny Signalleuchte mit einheitlichem Aussehen, insbesondere für ein Kraftfahrzeug
EP0635674A1 (fr) * 1993-07-23 1995-01-25 Valeo Vision Feu de signalisation à voyant et écran intermédiaire pour véhicule automobile
WO2019158890A1 (fr) * 2018-02-19 2019-08-22 Automotive Lighting Rear Lamps France Dispositif de signalisation pour véhicule automobile comprenant un écran opaque permettant le passage d'une plus grande quantité de lumière émise par une source de lumière dissimulée derrière ledit écran
DE102018002721A1 (de) * 2018-04-05 2019-10-10 Daimler Ag Beleuchtungsvorrichtung für ein Fahrzeug

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241388A (en) * 1978-05-30 1980-12-23 Lucas Industries Limited High contrast lamp assembly
FR2576565A3 (fr) * 1985-01-28 1986-08-01 Comind Spa Feu de signalisation a lumiere coloree pour vehicules automobiles
DE9002447U1 (de) * 1989-03-03 1990-05-03 Valeo Vision, Bobigny Signalleuchte mit einheitlichem Aussehen, insbesondere für ein Kraftfahrzeug
EP0635674A1 (fr) * 1993-07-23 1995-01-25 Valeo Vision Feu de signalisation à voyant et écran intermédiaire pour véhicule automobile
WO2019158890A1 (fr) * 2018-02-19 2019-08-22 Automotive Lighting Rear Lamps France Dispositif de signalisation pour véhicule automobile comprenant un écran opaque permettant le passage d'une plus grande quantité de lumière émise par une source de lumière dissimulée derrière ledit écran
DE102018002721A1 (de) * 2018-04-05 2019-10-10 Daimler Ag Beleuchtungsvorrichtung für ein Fahrzeug

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