EP3301352A1 - Fahrzeugleuchte - Google Patents

Fahrzeugleuchte Download PDF

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Publication number
EP3301352A1
EP3301352A1 EP17193888.9A EP17193888A EP3301352A1 EP 3301352 A1 EP3301352 A1 EP 3301352A1 EP 17193888 A EP17193888 A EP 17193888A EP 3301352 A1 EP3301352 A1 EP 3301352A1
Authority
EP
European Patent Office
Prior art keywords
light
light guide
guide body
appendage
extractor
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
EP17193888.9A
Other languages
English (en)
French (fr)
Other versions
EP3301352B1 (de
Inventor
Alessandro VAIRA
Sara Paroni
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
Automotive Lighting Italia 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 Automotive Lighting Italia SpA filed Critical Automotive Lighting Italia SpA
Priority to PL17193888T priority Critical patent/PL3301352T3/pl
Publication of EP3301352A1 publication Critical patent/EP3301352A1/de
Application granted granted Critical
Publication of EP3301352B1 publication Critical patent/EP3301352B1/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
    • 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
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-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
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces

Definitions

  • the present invention relates to a vehicle light.
  • vehicle light is understood to mean indifferently a rear automotive light or a front automotive light, the latter also known as a headlight.
  • a vehicle light is a lighting and/or signalling device of a vehicle comprising at least one external light of the vehicle having a lighting and/or signalling function toward the outside of a vehicle such as, for example, a position light, a direction indicator light, a brake light, a rear fog light, a reversing light, a low beam headlight, a high beam headlight, and the like.
  • the vehicle light in its simplest form comprises a container body, a lenticular body and at least one light source.
  • the lenticular body is placed so as to close a mouth of the container body so as to form a housing chamber.
  • the light source is arranged inside the housing chamber, which may be directed so as to emit light towards the lenticular body, when powered with electricity.
  • the light source typically used in vehicle lights is a light-emitting diode (LED) that can emit a beam of light of adequate power, while limiting electricity consumption and guaranteeing a long service life.
  • LED light-emitting diode
  • diodes may be placed near a side edge of a light guide rod or a light guide plate, so they can spread the light beam emitted by the diode along its entire length.
  • the light source typically the LED, must not however be visible from outside the vehicle light for aesthetic reasons.
  • the portion of light guide rod or plate proximal to the light source is not visible from the outside to prevent such portion from presenting points of high-intensity light and, in general, to prevent the light beam from not being uneven near said light source.
  • reference numeral 4 globally denotes a vehicle light, which the description which follows refers to without by so doing losing its general application.
  • vehicle light is understood to mean indifferently a rear vehicle light or a front vehicle light, the latter also known as a headlight.
  • the vehicle light comprises at least one external light of the vehicle having a lighting and/or signalling function, such as for example a position light, which may be a front, back, side position light, a direction indicator light, a brake light, a rear fog light, a reversing light, a low beam headlight, a high beam headlight, and the like.
  • a position light which may be a front, back, side position light, a direction indicator light, a brake light, a rear fog light, a reversing light, a low beam headlight, a high beam headlight, and the like.
  • the vehicle light 4 comprises a container body 8, usually of polymeric material, which typically permits the attachment of the vehicle light 4 to the relative vehicle.
  • the container body 8 may be any shape and size, as well as being placed anywhere in the vehicle.
  • the container body 8 delimits a containment seat 12 which houses a plurality of light sources 16 suitable to emit light beams to be propagated to outside the vehicle light 4.
  • the type of light source used is irrelevant; preferably, the light source 16 is a light source of light emitting diodes (LED).
  • the container body 8 may accommodate, in said containment seat 12, intermediate support elements 18 of the various optical and/or electronic components of the vehicle light 4, in a known manner.
  • the vehicle light 4 also comprises a lenticular body 20, at least partially adjacent to the container body 8.
  • the lenticular body 20 is thus applied to the container body 8 so as to close said containment seat 12 housing said light sources 16.
  • the lenticular body 20 may be external, so as to define at least one outer wall of the vehicle light directly subject to the atmosphere.
  • the lenticular body 20 is inside a vehicle so as to be housed inside a vehicle interior; this is the case, for example, of a dome light or a light that is part of a dashboard of a vehicle.
  • the lenticular body 20 closes the containment seat 12 and is suitable to be crossed by the beam of light produced by the light source 16.
  • the lenticular body 20 is made of at least partially transparent or semi-transparent or translucent material, and may also comprise one or more opaque portions, so as to allow in any case the at least partial transit of a main light beam emitted by said light sources 16.
  • the material of the lenticular body 20 is a resin such as PMMA, PC and the like.
  • the light sources 16 are preferably LED light sources comprising a support and power supply board 24 and LED 28 which emits the light beam.
  • the container body 8 contains a light guide 32 having a light guide body 36 extending from a first to a second end 40,44 in a main direction of extension S-S.
  • the light guide 32 may be a light guide of an elongated shape, such as a light guide rod, or even a light guide plate.
  • the main direction of extension S-S may be straight but, preferably, is a mainly curvilinear direction of extension S-S; preferably said main curvilinear direction of extension S-S is convex towards the associable lenticular body 20.
  • the light guide body 36 is typically made of polymeric material and is shaped so as to transmit inside it a beam of light by successive reflections, according to a total internal reflection (TIR) condition, in the known manner.
  • TIR total internal reflection
  • the vehicle light 4 comprises a first light source 16A facing said first end 40 so as to inject a first beam of light F' in the light guide 32 through said first end 40 and a second light source 16B facing said second end 44, so as to inject a second light beam F" in the light guide 32 through said second end 44.
  • first light source 16A is supported by a first support and power supply board 24' while the second light source 16B is supported by a second support and power supply board 24''.
  • the light guide body 36 at least at one of said ends 40,44, comprises a collimator device 56 of the light beam produced by the corresponding light source 16, 16A, 16B: this way it is possible to control precisely the direction of the light beam introduced into the light guide 32 and therefore its extraction, as more fully described below.
  • the light guide body 36 is designed to transmit by means of a total internal reflection the light beams injected into it by the light sources 16,16A, 16B.
  • the light guide body 36 comprises a plurality of extractor or deflector elements 60 configured to extract the light beams, that run through the light guide body 36, in a main longitudinal direction X-X towards the lenticular body 8, so as to come out on the outside of the vehicle light 4 through the lenticular body 8.
  • the main longitudinal direction X-X is, for example, parallel to the rectilinear direction of travel of the vehicle on which the vehicle light 4 is fitted.
  • the extractor or deflector elements 60 are typically, but not exclusively, prisms configured to extract light in a given direction, i. e. the main longitudinal direction X-X.
  • the reflectors or deflector elements 60 may be reflective surfaces, for example optics such as prisms or sloping walls, or mirrors, suitably applied to the light guide body 36 so as to receive a beam of light and reflect it outside the light guide body 36 and vehicle light 4, for example along the main longitudinal direction X-X.
  • optics such as prisms or sloping walls, or mirrors
  • the light guide body 36 comprises a first appendage 64 which forks from the light guide body 36 on the side of the first end 40 so as to position itself, with respect to the main longitudinal direction X-X, between the light guide body 36 and the lenticular body 20 in order to cover the first light source 16A and/or the first support and power supply board 24'.
  • the light guide body 36 at said first end 40 equipped with the first appendage 64, substantially assumes a' Y' conformation.
  • the light guide body 36 comprises a second appendage 68 which forks from the light guide body 36 on the side of the second end 44 so as to position itself, with respect to the main longitudinal direction X-X, between the light guide body 36 and the lenticular body 20 in order to cover the second light source 16B, and/or the relative second support and power supply board 24".
  • the light-guide body 36, at said second end 44 equipped with the second appendage 68, is substantially Y-shaped.
  • the light guide body 36 is in one piece with its appendages 64,68.
  • the light guide 32 is shaped so that the first appendage 64 receives at least partially the second beam F" produced by the second light source 16B and extracts it along the main direction X-X, and the second appendage 68 receives at least partially the first beam of light F' produced by the first light source 16A and extracts it along the main direction X-X.
  • the light guide body 36 is shaped so that the first light beam F ' emitted by the first light source 16A travels by subsequent reflections through the light guide body 36 towards the second end 44.
  • the first light beam F' is partially extracted towards the lenticular body 8 by first extractor or deflector elements 60' of the light guide body 36 and is channelled into the second appendage 68 from which it is extracted towards the lenticular body 8, without reaching the second end 44.
  • the light guide body 36 is shaped so that the second beam of light F" emitted by the second light source 16B travels along the light guide body 36 towards the first end 40, by subsequent reflections is partially extracted towards the lenticular body 8 by second extractor or deflector elements 60" of the light guide body 36 and is channelled in the first appendage 64 from which it is extracted towards the lenticular body 8, without reaching the first end 40.
  • the first extractor or deflector elements 60' are configured to extract towards the lenticular body 8 the first beam of light F' emitted by the first light source 16A and so as not to extract, but to transmit by total internal reflection, the second light beam F" emitted by the second light source 16B. It is clear that this condition is not absolute and therefore some light rays of the second light beam F'' may be extracted by the first extractor or deflector elements 60''.
  • the second extractor or deflector elements 60" are configured to extract towards the lenticular body 8 the second beam of light F" emitted by the second light source 16B and so as not to extract, but to transmit by total internal reflection, the first light beam F' emitted by the first light source 16A. It is clear that this condition is not absolute and therefore some light rays of the first light beam F' may be extracted by the second extractor or deflector elements 60".
  • the light guide body 36 comprises a plurality of first and second extractor or deflector elements 60', 60", suitable for extracting the beam F', F" along the main longitudinal direction X-X towards the lenticular body 8, said first and second extractor or deflector elements 60',60" being placed at an intermediate portion 72 between the first and second appendage 64,68.
  • the first and second appendages 64,68 comprise first and second lateral extractor or deflector elements 80' , 80" arranged at respective adjacent first and second light sources 16A, 16B.
  • Said first and second lateral extractors or deflector elements 80', 80" extend respectively for a portion L', L" not less than the extension of the corresponding light source 16A, 16B so as to extract towards the lenticular body 8 a respective beam of light F', F" covering the vision from outside of said light sources 16A, 16B.
  • the first beam F ' is extracted towards the lenticular body 20 by the first extractor or deflector elements 60, proximal to the first light source 16A, travels along the light guide body 36, is channelled into the second appendage 68 and is further extracted towards the lenticular body 20 by second extractors or deflectors elements 80".
  • the second light beam F" is extracted towards the lenticular body 20 by second extractor or deflector elements 60", proximal to the second light source 16B, travels along the light guide body 36, is channelled into the first appendage 64 and is further extracted towards the lenticular body 20 by first extractor or deflector elements 80".
  • the light guide body 36 at the ends 40,44 superposed to said appendages 64,68, is devoid of extractor or deflector elements: therefore at said first and second portions T', T" respectively superposed to the first and second appendages 64,68, the light guide body 36 transmits each beam of light F', F" in total internal reflection without extracting it outwards.
  • the extractor or deflector elements 60', 60" of the first and second appendage 64,68 extend to superpose the extractor or deflector elements 60 of the intermediate portion 72 of the light guide body 36, between the first and second appendages 64,68.
  • the light guide body 36 at a first fork portion 84 with each first and second appendage 64,68, comprises diffuser elements 88 placed facing the lenticular body 8, to spread the light beams F', F" extracted by the plurality of extractor or deflector elements 60',60" into the surrounding environment.
  • each appendage 64,68 is at least equal to 1.5 times the cross-section of the light guide body 36 at the relative end 40,44 so as to maximize the portion of light beam F', F" channelled into each appendage 64,68.
  • said intermediate portion 72 comprises at least one intermediate dark portion 76, devoid of extractor or deflector elements 60 which transmit by total internal reflection each beam of light F', F" travelling through it, towards a corresponding end 40,44 of the light guide body 36.
  • an auxiliary light source may be provided at said intermediate dark portion 76 for the purpose of providing an additional signalling and/or lighting function.
  • each light source 16A, 16B emits its own beam of light F', F" directed from its end 40, 44 toward the opposite end 44, 40 along the main direction of extension S-S.
  • the two beams F', F" spread inside the light guide body 36 by total internal reflection, except for the portions where extractors or deflector elements 60 are provided.
  • the first beam F' is propagated for a first portion T' according to the condition of total internal reflection: this first portion T' is in fact devoid of extractor or deflector elements.
  • Such first portion T' is in turn hidden by the corresponding first appendage 64 which extracts the second beam F" from the second light source 16B, through the first lateral extractor or deflector elements 80'.
  • Said second beam F extracted hides the presence of the first light source 16A from external view.
  • the first beam F' is propagated along the light guide body 36 and is partially extracted by the extractor or deflector elements 60, located on the intermediate section 72, on the side of the first end 40.
  • the first beam F' reaches, by subsequent internal reflections, the second appendage 68 and is extracted outwards by the second lateral extractor or deflector elements 80". This way, the first beam F' conceals from external view the presence of the second light source 16B.
  • the second beam F" is propagated for a second portion T''' with total internal reflection: said second portion T" is in fact devoid of extractor or deflector elements. Said second portion T'' is in turn hidden by the corresponding second appendage 68, which extracts the first beam F' coming from the first light source 16A, through the second lateral extractor or deflector elements 80". Said first beam F' extracted hides the presence of the second light source 16A from external view.
  • the second beam F" is propagated along the light guide body 36 and is partially extracted by the extractor or deflector elements 60, located on the intermediate section 72, on the side of the second end 44.
  • the second beam F'' reaches, by subsequent internal reflections, the first appendage 64 and is extracted outwards by the first lateral extractor or deflector elements 80'. This way, the second beam F" conceals from external view the presence of the first light source 16B.
  • the present invention makes it possible to overcome the drawbacks mentioned of the prior art.
  • the light according to the present invention allows a homogeneous overall beam of light to be obtained which meets the photometric requirements at the same time, obtaining coverage of the light sources inside the light which are not visible from the outside.
  • the light patterns obtained are also characterized by a remarkable uniformity and homogeneity of the light beam diffused outside the vehicle light, thanks to a homogeneous fusion of the light beams produced.

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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)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP17193888.9A 2016-09-30 2017-09-28 Fahrzeugleuchte Active EP3301352B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17193888T PL3301352T3 (pl) 2016-09-30 2017-09-28 Lampa pojazdu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000098165A IT201600098165A1 (it) 2016-09-30 2016-09-30 Fanale automobilistico

Publications (2)

Publication Number Publication Date
EP3301352A1 true EP3301352A1 (de) 2018-04-04
EP3301352B1 EP3301352B1 (de) 2021-12-15

Family

ID=58455408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17193888.9A Active EP3301352B1 (de) 2016-09-30 2017-09-28 Fahrzeugleuchte

Country Status (4)

Country Link
EP (1) EP3301352B1 (de)
ES (1) ES2908699T3 (de)
IT (1) IT201600098165A1 (de)
PL (1) PL3301352T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021170497A1 (en) * 2020-02-27 2021-09-02 Signify Holding B.V. Light generating device
WO2022007958A1 (zh) * 2020-07-09 2022-01-13 深圳市绎立锐光科技开发有限公司 照明装置及车辆用灯具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1434000A2 (de) * 2002-12-20 2004-06-30 Valeo Vision Beleuchtungs- und/oder Signalvorrichtung für Kraftfahrzeuge
DE102008034052A1 (de) * 2008-07-22 2010-01-28 Hella Kgaa Hueck & Co. Lichtleitkörper, insbesondere für ein Kraftfahrzeug
EP2261083A1 (de) * 2008-03-03 2010-12-15 Fujikura, Ltd. Türspiegelvorrichtung
EP2607777A1 (de) * 2011-12-21 2013-06-26 Automotive Lighting Italia S.p.A. A Socio Unico Fahrzeugleuchte
WO2015029852A1 (ja) * 2013-08-27 2015-03-05 株式会社小糸製作所 車輌用灯具
US20160193954A1 (en) * 2015-01-06 2016-07-07 Koito Manufacturing Co., Ltd. Vehicle lamp

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1434000A2 (de) * 2002-12-20 2004-06-30 Valeo Vision Beleuchtungs- und/oder Signalvorrichtung für Kraftfahrzeuge
EP2261083A1 (de) * 2008-03-03 2010-12-15 Fujikura, Ltd. Türspiegelvorrichtung
DE102008034052A1 (de) * 2008-07-22 2010-01-28 Hella Kgaa Hueck & Co. Lichtleitkörper, insbesondere für ein Kraftfahrzeug
EP2607777A1 (de) * 2011-12-21 2013-06-26 Automotive Lighting Italia S.p.A. A Socio Unico Fahrzeugleuchte
WO2015029852A1 (ja) * 2013-08-27 2015-03-05 株式会社小糸製作所 車輌用灯具
US20160193954A1 (en) * 2015-01-06 2016-07-07 Koito Manufacturing Co., Ltd. Vehicle lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021170497A1 (en) * 2020-02-27 2021-09-02 Signify Holding B.V. Light generating device
WO2022007958A1 (zh) * 2020-07-09 2022-01-13 深圳市绎立锐光科技开发有限公司 照明装置及车辆用灯具

Also Published As

Publication number Publication date
ES2908699T3 (es) 2022-05-03
EP3301352B1 (de) 2021-12-15
PL3301352T3 (pl) 2022-05-23
IT201600098165A1 (it) 2018-03-30

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