EP3354971A1 - Beleuchtungsvorrichtung für mit led-beleuchtungsmodulen ausgestattete fahrzeuge - Google Patents

Beleuchtungsvorrichtung für mit led-beleuchtungsmodulen ausgestattete fahrzeuge Download PDF

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Publication number
EP3354971A1
EP3354971A1 EP17154083.4A EP17154083A EP3354971A1 EP 3354971 A1 EP3354971 A1 EP 3354971A1 EP 17154083 A EP17154083 A EP 17154083A EP 3354971 A1 EP3354971 A1 EP 3354971A1
Authority
EP
European Patent Office
Prior art keywords
led light
light source
section
reflector
framed support
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
EP17154083.4A
Other languages
English (en)
French (fr)
Other versions
EP3354971B1 (de
Inventor
Pablo RODRIGUEZ ORTEGA
Stephanie RENARD
Sergio Zattoni
Michael Bore
Whilk Marcelino GONCALVES
Christophe Le Dall
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.)
PSA Automobiles SA
Marelli Automotive Lighting Italy SpA
Original Assignee
PSA Automobiles SA
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 PSA Automobiles SA, Automotive Lighting Italia SpA filed Critical PSA Automobiles SA
Priority to EP17154083.4A priority Critical patent/EP3354971B1/de
Priority to CN201810097039.8A priority patent/CN108916800B/zh
Publication of EP3354971A1 publication Critical patent/EP3354971A1/de
Application granted granted Critical
Publication of EP3354971B1 publication Critical patent/EP3354971B1/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
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals

Definitions

  • the present invention relates to a lighting device equipped with one or more lighting modules using LEDs as a light source and having rotation capabilities in order to provide selectively more than one optical functions, like signaling functions as position light, direction light, welcome light, DRL (Daytime Running Light), and/or lighting functions like a forward low beam (cross beam) or fog beam eventually provided with advanced adaptive functions like AFS (Adaptive Function System) and DBL (Dynamic Bending Light).
  • signaling functions as position light, direction light, welcome light, DRL (Daytime Running Light)
  • DRL Daytime Running Light
  • lighting functions like a forward low beam (cross beam) or fog beam eventually provided with advanced adaptive functions like AFS (Adaptive Function System) and DBL (Dynamic Bending Light).
  • AFS Adaptive Function System
  • DBL Dynamic Bending Light
  • Lighting devices for vehicles provided with rotating LED lighting modules are known in the art.
  • EP2902701 discloses a device wherein a lighting module comprises a light source and at least one reflector and wherein the reflector is motorized and the light source is a LED; the reflector consists of a rotating support having two opposite faces, one constituting the reflector and the other realizing a second function, e.g. an aspect function; a fixed motor rotates the support with respect to the fixed LED light source in order to bring selectively the two faces on the front side of the device facing toward the direction of motion of the vehicle; the support also bears at its opposite faces two light guides operatively associated with a second LED.
  • a lighting module comprises a light source and at least one reflector and wherein the reflector is motorized and the light source is a LED; the reflector consists of a rotating support having two opposite faces, one constituting the reflector and the other realizing a second function, e.g. an aspect function; a fixed motor rotates the support with respect to the fixed LED light source in order to bring selectively the two faces on the front side of the
  • the object of the present invention is to provide a lighting device for vehicles having one or more lighting modules using LEDs as the light source that is compact, simple and cost-effective in construction and highly reliable, while ensuring at the same time an optimal dissipation of the heat generated by the LEDs.
  • a lighting module and a lighting device for vehicles including one or more such lighting modules are provided having the features set out in the appended claims.
  • reference numeral 1 indicates as a whole a lighting device consisting, in the non-limiting embodiment shown, in a vehicle headlight, which is only in part and only schematically shown. It is however to be intended that what will be described can be applied to any vehicle lighting device.
  • the lighting device 1 comprises a generally cup-shaped housing 2 designed to be mounted on a vehicle, known and shown only in part for sake of simplicity.
  • Housing 2 is made of synthetic plastic material by injection molding and has a front inlet opening 3 in use facing opposite to the vehicle and along a driving direction of the vehicle, closed by a transparent cover, known and not shown for sake of simplicity .
  • housing 2 carries at the interior thereof at least one rotating lighting module 5 shown in details in figure 2 .
  • housing 2 may carry within it more than one lighting module 5 (e.g. two or three, arranged side by side) that may be visible from the outside through the inlet opening 3 and, preferably, at least one stationary lighting module 11.
  • One lighting module 5 is shown in more details in figure 2 and is arranged facing the front transparent screen/cover closing the inlet opening 3 of the cup-shaped housing 2.
  • the lighting module 5 is of the rotating type and is designed to specifically equip a lighting device for vehicles like lighting device 1.
  • the rotating lighting module 5 comprises at least one first light source 6, at least one first reflector 7 and at least one first actuator 8 ( Figure 2 ) to rotate the first reflector 7 relative to the first light source 6 around a first axis A.
  • the rotating lighting module 5 further comprises a framed support 4 holding rigid in a fixed position the first light source 6 and bearing in idling manner the first reflector 7; the framed support 4 also bears the first actuator 8, which may consists in a rotating electric motor.
  • the rotating lighting module 5 further comprises a lens 9 placed in front of the first reflector 7 and assembled angularly rigid therewith to rotate rigid with the first reflector 7 and eccentrically to axis A, so that both lens 9 and first reflector 7 forms together a rotating unit 10 powered by the first actuator 8.
  • the first light source 6 is a LED; moreover, the lighting module 5 further comprises a couple of second light sources 13 and a third light source 14, all constituted by different LEDs; the LEDs 6,13,14 constituting the first, second and third light sources are assembled all together on a printed circuit board 15 in specific positions and the printed circuit board 15 is carried in a fixed manner by the framed support 4 directly above the rotating unit 10 and on the side opposite to the first actuator 8.
  • the first light source 6 is arranged substantially aligned with the first axis A and faces the first reflector 7, this latter being designed to collect the light emitted by the first light source 6 and to deviate it as a shaped light beam 16 (shown schematically in dotted lines in figure 2 ) through the lens 9.
  • the direction of propagation of the light beam 16 when the lighting module 5 is not rotated, is arrange parallel to an optical axis 0 of the lighting module 11 and of the whole lighting device 1 ( figure 1 ), which optical axis O is directed parallel to the running forward direction of the vehicle on which the lighting device 1 is mounted
  • the rotating unit 10 further comprises a backing holder 18 for the first reflector 7, which backing holder 18 is angularly rigid with the reflector 7 and with the lens 9 and is arranged on the rear of the first reflector 7, on the side opposite to the lens 9 in relation to the first reflector 7; the backing holder 18 is wider than the first reflector 7 so as to flank the first reflector 7 on both lateral sides of the lens 9.
  • the rotating unit 10 further comprises a flange element 21 ( figure 2 ) which mechanically connects on the side opposite to the first actuator 8 an upper end 22 of the lens with the backing holder 18; the flange element 21 is wider than the lens 9 so as to flank the first reflector 7 on both lateral sides thereof.
  • a bottom end 26 of the lens 9 facing opposite to the upper end 22 and the flange element 21 is also connected rigid with the reflector 7 and the backing holder 18 thereof, so as the flange element 21, lens 9, reflector 7 and backing holder 18 realize a rigid frame structure constituting the rotating unit 10, freely rotatable around axis A.
  • the flange element 21 is also provided with a through hole 23 facing the first LED light source 6.
  • the lens 9 is preferably optically neutral so as the light beam 16 is shaped according to the required photometric characteristics solely by the reflector 9.
  • the light source 6 and reflector 7 may be designed in order to generate a low (cross-) beam function having AFS (Adaptive Function System) and DBL (Dynamic Bending Light) capabilities, which capabilities may be obtained by merely rotating the rotating unit 10 around axis A.
  • AFS Adaptive Function System
  • DBL Dynamic Bending Light
  • the second light sources 13 may be associated with a light guide (not shown) integrated in the periphery of lens 9.
  • the printed circuit board 15 has in a plan view a rectangular shape and bears the third LED light source 14 at a rear end 29 thereof opposite to LED light source 6;
  • LED light source 14 is an RGB LED and the framed support 4 bears at a middle section thereof a second reflector 30, which is fixed in relation to the rotating unit 10 and is rigid with the framed support 4 arranged in such a position to be operatively associated with the third light source 14;
  • reflector 30 is laterally quite wider than lens 9, in order to laterally project beyond the lateral sides thereof.
  • the lighting module 5 is able to implement, other than a low beam function with AFS and/or DBL capabilities, also a welcome light function by means of the RGB light source 14 and the reflector 30.
  • the at least one first LED light source 6 is operatively associated with the framed support 4 in such a manner to transfer thereto by heat conduction at least a major part of a thermal flow F generated in operation by the LED light source 6.
  • it is the whole printed circuit board 15 with all the LED light sources 6,13,14 supported thereby, that is operatively associated with the framed support 4 in such a manner to transfer thereto by heat conduction at least a major part of a thermal flow F generated in operation by all the LED light sources 5,13,14.
  • the framed support 4 is made entirely of a heat conductive metal or metal alloy and is designed to behave as a thermal dissipator.
  • the framed support 4 is made entirely of a press-molded alloy of aluminum or of another light alloy, possibly including copper.
  • At least a first section 31 of the framed support 4, which section 31 is closer to the at least one first LED light source 6, has a solid cross-section (i.e. without empty parts within its perimeter) provided with projecting lateral extensions 32.
  • the framed support 4 is formed by the side by side junction, e.g. via removable transversal fixing elements like pins, screws, brackets, well known and not shown for sake of simplicity, of two specular symmetric structural elements 33,34, each comprising a first end section 35 and a middle section 36 having C-shaped solid cross-sections and a second end section 37, opposite the first and shaped like an half shell.
  • the first end sections 35 of the two structural elements 33,34 when joined, form the first section 31 of the framed support 4 which is the part of the framed support 4 closer to the first LED light source 6 and in fact bearing the printed circuit board 15.
  • the first section 31 has a double T cross-section formed by the joined two C-shaped cross sections of the two sections 35 of the structural elements 33,34 arranged facing opposite to each other.
  • middle sections 36 of the two structural elements 33,34 when joined, form a middle section 38 of the framed support 4; such a middle section 38 also has a double T cross-section formed by the joined two C-shaped cross sections of the two middle sections 36 of the structural elements 33,34 arranged facing opposite to each other.
  • the second end sections 37 of the two structural elements 33,34 when joined, form a second section 39 of the framed support 4 (cut away in figure 2 for sake of simplicity); the second section 39 is the part of the framed support 4 farthest away from the first LED light source 6 and has a box-like shape in order to idly receive the rotating first reflector 7.
  • the printed circuit board 15 carrying the LEDs 6,13,14 is assembled onto the first section 31 of the framed support 4 against a bottom face thereof formed by two projecting extensions 32 and facing towards the second section 39; in particular the printed circuit board 15 is assembled onto the first section 31 in thermal contact therewith.
  • This may be accomplished merely by realizing a very close mechanical contact obtained by applying a pressure, e.g. by using screws (not shown) for assembling the printed circuit board 15 against the bottom projecting extensions 32 of the two structural elements 33,34 (e.g. screwed into holes 40 shown in figure 3 ); or a thermal adhesive 41 ( figure 2 ) may be interposed between a face of the printed circuit board opposite to that bearing the LEDs 6,13,14 and the bottom projecting extensions 32 of the two structural elements 33,34. Eventually, both the solutions (screws and thermal adhesive 41) may be adopted.
  • a thermal adhesive 41 which is not electrically conductive may be used and conductive metallic tracks 42 for electrically feeding the LEDs 6,13,14 (e.g. via a flat insulated flexible conductor cable 43) may be provided on the face of the printed circuit board 15 opposite to that bearing the LEDs 6, 13, 14 (i.e. facing the section 31) and connected to the LEDs 6,13,14 through the thickness of the printed circuit board.
  • the second reflector 30 operatively associated with the third LED light source 14 is made preferably of a metal and in that case may be mounted in thermal contact with the middle section 38 of the framed support 4 in order to contribute to the thermal dissipation.
  • the first section 31 of the framed support 4 is provided with a receiving seat 44 for the printed circuit board 15 obtained by making the first section 31 thinner that the middle section 38 so as to provide a step 45 between the first and middle sections 31, 38.
  • the lighting device 1 comprises, as already stated, a stationary lighting module 11 and two or more (in the example shown three) rotating lighting modules 5 arranged side by side; each rotating lighting module 5 has its own framed support 4 mechanically connected to a transverse rail 46 ( figure 1 ) preferably made of metal and arranged substantially parallel to a width of the inlet opening 3.
  • the lighting module 11 which also uses LED light sources, is provided with a usual thermal (finned) dissipator arranged on the rear of the light module 11, the light modules 5 according to the invention do not need a traditional dissipator like dissipator 47 arranged in contact with the printed circuit board 15; in fact the structural element 4 also act as a thermal dissipator and with its double T cross-section in the first section 31 and in the middle section 38 dissipate by radiation the heat that it conduces along itself very easily being made of conductive metal; therefore the heat cannot accumulate and is dispersed in an efficient manner along a very broad exchange surface constituted by the whole outer surface of the framed support 4.
  • the efficiency of the framed support 4 as a thermal dissipator has been experimentally tested using a framed support 4 made of aluminum.
  • the distribution of temperatures with all' the LEDs 6,13,14 switched on is shown in figure 4 : as it may be seen, the temperature close to the LEDs, i.e. in the section 31 (top part of the diagram of figure 4 ) is lower than 60°C, so ensuring a high efficiency to the LEDs and is around 40°C at the bottom of the framed support 4, i.e. at the section 39.
EP17154083.4A 2017-01-31 2017-01-31 Beleuchtungsvorrichtung für mit led-beleuchtungsmodulen ausgestattete fahrzeuge Active EP3354971B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17154083.4A EP3354971B1 (de) 2017-01-31 2017-01-31 Beleuchtungsvorrichtung für mit led-beleuchtungsmodulen ausgestattete fahrzeuge
CN201810097039.8A CN108916800B (zh) 2017-01-31 2018-01-31 具有led照明模块的车辆用照明装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17154083.4A EP3354971B1 (de) 2017-01-31 2017-01-31 Beleuchtungsvorrichtung für mit led-beleuchtungsmodulen ausgestattete fahrzeuge

Publications (2)

Publication Number Publication Date
EP3354971A1 true EP3354971A1 (de) 2018-08-01
EP3354971B1 EP3354971B1 (de) 2021-06-30

Family

ID=57963033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17154083.4A Active EP3354971B1 (de) 2017-01-31 2017-01-31 Beleuchtungsvorrichtung für mit led-beleuchtungsmodulen ausgestattete fahrzeuge

Country Status (2)

Country Link
EP (1) EP3354971B1 (de)
CN (1) CN108916800B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113775964A (zh) * 2021-09-10 2021-12-10 厦门东昂科技股份有限公司 基于led灯具电路的超薄型模块化系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008010265A (ja) * 2006-06-28 2008-01-17 Ichikoh Ind Ltd 車両用前照灯
US20080266890A1 (en) * 2007-04-26 2008-10-30 Koito Manufacturing Co., Ltd. Vehicle lamp
EP2386794A2 (de) * 2010-05-12 2011-11-16 Ichikoh Industries, Ltd. Fahrzeugbeleuchtungsvorrichtung
EP2902701A1 (de) 2014-02-04 2015-08-05 Valeo Vision Drehbares Beleuchtungs- und/oder Signalisierungsmodul mit feststehender Lichtquelle
DE102015206755A1 (de) * 2014-11-04 2016-05-04 Hyundai Motor Company Fahrzeugleuchte

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9518711B2 (en) * 2011-09-27 2016-12-13 Truck-Lite Co., Llc Modular headlamp assembly
TWI565605B (zh) * 2012-02-20 2017-01-11 鴻海精密工業股份有限公司 車前燈燈具模組
CN104100905B (zh) * 2014-06-19 2016-07-13 安徽湛蓝光电科技有限公司 Led汽车用远近光一体化前照大灯
FR3036687B1 (fr) * 2015-05-28 2019-01-25 Zodiac Aero Electric Dispositif d'eclairage pour aeronef permettant l'integration en son centre de fonctions additionnelles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008010265A (ja) * 2006-06-28 2008-01-17 Ichikoh Ind Ltd 車両用前照灯
US20080266890A1 (en) * 2007-04-26 2008-10-30 Koito Manufacturing Co., Ltd. Vehicle lamp
EP2386794A2 (de) * 2010-05-12 2011-11-16 Ichikoh Industries, Ltd. Fahrzeugbeleuchtungsvorrichtung
EP2902701A1 (de) 2014-02-04 2015-08-05 Valeo Vision Drehbares Beleuchtungs- und/oder Signalisierungsmodul mit feststehender Lichtquelle
DE102015206755A1 (de) * 2014-11-04 2016-05-04 Hyundai Motor Company Fahrzeugleuchte

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113775964A (zh) * 2021-09-10 2021-12-10 厦门东昂科技股份有限公司 基于led灯具电路的超薄型模块化系统
CN113775964B (zh) * 2021-09-10 2023-10-10 厦门东昂科技股份有限公司 基于led灯具电路的超薄型模块化系统

Also Published As

Publication number Publication date
CN108916800A (zh) 2018-11-30
CN108916800B (zh) 2023-04-14
EP3354971B1 (de) 2021-06-30

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