EP3354971A1 - Lighting device for vehicles provided with led lighting modules - Google Patents
Lighting device for vehicles provided with led lighting modules Download PDFInfo
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910001092 metal group alloy Inorganic materials 0.000 claims abstract description 3
- 239000007787 solid Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910001234 light alloy Inorganic materials 0.000 claims description 2
- 230000006870 function Effects 0.000 description 10
- 230000003044 adaptive effect Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009131 signaling function Effects 0.000 description 1
Images
Classifications
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- 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
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- 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.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
- 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).
- Lighting devices for vehicles provided with rotating LED lighting modules are known in the art.
- For example,
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. - In devices like that one of
EP2902701 it is however difficult to dissipate the heat produced by the LED light source by means of the usual finned dissipating elements which are thermally coupled with the printed circuit board bearing the LEDs. Such a dissipating element, which is usually a fair large one, may in fact interferes with the moving parts of the lighting module and in any case increases considerably the bulk of the lighting module to such an extent to be impractical. The alternative solution actually adopted is to use a smaller dissipating element, which however is not able to maintain the temperature of the LEDs to a sufficiently low value to avoid the efficiency of the LEDs to decrease dramatically. - 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.
- According to the invention, therefore, 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.
- Further features and advantages of the present invention will become more apparent from the following description of one non-limiting embodiment thereof, made with reference to the figures in the accompanying drawings, in which:
-
figure 1 shows schematically a plan view from the top of a lighting device according to the invention; -
figure 2 shows in an enlarged scale, a side elevation view of a rotating lighting module according to the invention of the lighting device offigure 1 ; -
figure 3 shows schematically and in perspective view from the bottom a constructive element of the rotating lighting module offigure 2 ; and -
figure 4 shows a temperature diagram showing the temperature distribution in the lighting module offigure 2 . - With reference to
figure 1 , 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 . - According to the present invention,
housing 2 carries at the interior thereof at least one rotatinglighting module 5 shown in details infigure 2 . Of course,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 onestationary lighting module 11. - One
lighting module 5 is shown in more details infigure 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 onefirst light source 6, at least onefirst reflector 7 and at least one first actuator 8 (Figure 2 ) to rotate thefirst reflector 7 relative to thefirst light source 6 around a first axis A. - The rotating
lighting module 5 further comprises aframed support 4 holding rigid in a fixed position thefirst light source 6 and bearing in idling manner thefirst reflector 7; theframed support 4 also bears thefirst actuator 8, which may consists in a rotating electric motor. - The rotating
lighting module 5 further comprises alens 9 placed in front of thefirst reflector 7 and assembled angularly rigid therewith to rotate rigid with thefirst reflector 7 and eccentrically to axis A, so that bothlens 9 andfirst reflector 7 forms together a rotatingunit 10 powered by thefirst actuator 8. - The
first light source 6 is a LED; moreover, thelighting module 5 further comprises a couple ofsecond light sources 13 and athird light source 14, all constituted by different LEDs; theLEDs circuit board 15 in specific positions and the printedcircuit board 15 is carried in a fixed manner by theframed support 4 directly above the rotatingunit 10 and on the side opposite to thefirst actuator 8. - The
first light source 6 is arranged substantially aligned with the first axis A and faces thefirst reflector 7, this latter being designed to collect the light emitted by thefirst light source 6 and to deviate it as a shaped light beam 16 (shown schematically in dotted lines infigure 2 ) through thelens 9. The direction of propagation of thelight beam 16 when thelighting module 5 is not rotated, is arrange parallel to an optical axis 0 of thelighting 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 - According to a preferred embodiment of the invention, the rotating
unit 10 further comprises abacking holder 18 for thefirst reflector 7, whichbacking holder 18 is angularly rigid with thereflector 7 and with thelens 9 and is arranged on the rear of thefirst reflector 7, on the side opposite to thelens 9 in relation to thefirst reflector 7; thebacking holder 18 is wider than thefirst reflector 7 so as to flank thefirst reflector 7 on both lateral sides of thelens 9. - Moreover, the rotating
unit 10 further comprises a flange element 21 (figure 2 ) which mechanically connects on the side opposite to thefirst actuator 8 anupper end 22 of the lens with thebacking holder 18; theflange element 21 is wider than thelens 9 so as to flank thefirst reflector 7 on both lateral sides thereof. - A
bottom end 26 of thelens 9 facing opposite to theupper end 22 and theflange element 21 is also connected rigid with thereflector 7 and thebacking holder 18 thereof, so as theflange element 21,lens 9,reflector 7 andbacking holder 18 realize a rigid frame structure constituting the rotatingunit 10, freely rotatable around axis A. - The
flange element 21 is also provided with a throughhole 23 facing the firstLED light source 6. Thelens 9 is preferably optically neutral so as thelight beam 16 is shaped according to the required photometric characteristics solely by thereflector 9. - The
light source 6 andreflector 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 therotating unit 10 around axis A. - The second
light sources 13 may be associated with a light guide (not shown) integrated in the periphery oflens 9. - The printed
circuit board 15 has in a plan view a rectangular shape and bears the thirdLED light source 14 at arear end 29 thereof opposite toLED light source 6;LED light source 14 is an RGB LED and the framedsupport 4 bears at a middle section thereof a second reflector 30, which is fixed in relation to the rotatingunit 10 and is rigid with the framedsupport 4 arranged in such a position to be operatively associated with the thirdlight source 14; reflector 30 is laterally quite wider thanlens 9, in order to laterally project beyond the lateral sides thereof. - Owing to the second reflector 30 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 RGBlight source 14 and the reflector 30. - According to the main aspect of the invention, the at least one first
LED light source 6 is operatively associated with the framedsupport 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 LEDlight source 6. In particular, in the preferred embodiment shown, it is the whole printedcircuit board 15 with all theLED light sources 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 theLED light sources - In combination with this first feature, the framed
support 4 is made entirely of a heat conductive metal or metal alloy and is designed to behave as a thermal dissipator. Preferably, the framedsupport 4 is made entirely of a press-molded alloy of aluminum or of another light alloy, possibly including copper. - In order to increase the capacity of heat conduction and of heat dissipation (
figure 3 ), at least afirst section 31 of the framedsupport 4, whichsection 31 is closer to the at least one firstLED light source 6, has a solid cross-section (i.e. without empty parts within its perimeter) provided with projectinglateral extensions 32. In the preferred embodiment shown, the framedsupport 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 symmetricstructural elements first end section 35 and amiddle section 36 having C-shaped solid cross-sections and asecond end section 37, opposite the first and shaped like an half shell. - The
first end sections 35 of the twostructural elements first section 31 of the framedsupport 4 which is the part of the framedsupport 4 closer to the firstLED light source 6 and in fact bearing the printedcircuit board 15. - In this manner, the
first section 31 has a double T cross-section formed by the joined two C-shaped cross sections of the twosections 35 of thestructural elements - The
middle sections 36 of the twostructural elements middle section 38 of the framedsupport 4; such amiddle section 38 also has a double T cross-section formed by the joined two C-shaped cross sections of the twomiddle sections 36 of thestructural elements - The
second end sections 37 of the twostructural elements second section 39 of the framed support 4 (cut away infigure 2 for sake of simplicity); thesecond section 39 is the part of the framedsupport 4 farthest away from the firstLED light source 6 and has a box-like shape in order to idly receive the rotatingfirst reflector 7. - According to an aspect of the invention, the printed
circuit board 15 carrying theLEDs first section 31 of the framedsupport 4 against a bottom face thereof formed by two projectingextensions 32 and facing towards thesecond section 39; in particular the printedcircuit board 15 is assembled onto thefirst 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 thebottom projecting extensions 32 of the twostructural elements 33,34 (e.g. screwed intoholes 40 shown infigure 3 ); or a thermal adhesive 41 (figure 2 ) may be interposed between a face of the printed circuit board opposite to that bearing theLEDs bottom projecting extensions 32 of the twostructural elements - In order to further improve heat transmission, a
thermal adhesive 41 which is not electrically conductive may be used and conductivemetallic tracks 42 for electrically feeding theLEDs circuit board 15 opposite to that bearing theLEDs LEDs - 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 themiddle section 38 of the framedsupport 4 in order to contribute to the thermal dissipation. - As shown in
figure 3 , thefirst section 31 of the framedsupport 4 is provided with a receivingseat 44 for the printedcircuit board 15 obtained by making thefirst section 31 thinner that themiddle section 38 so as to provide astep 45 between the first andmiddle sections - 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; eachrotating lighting module 5 has its own framedsupport 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. - While the
lighting module 11, which also uses LED light sources, is provided with a usual thermal (finned) dissipator arranged on the rear of thelight module 11, thelight modules 5 according to the invention do not need a traditional dissipator likedissipator 47 arranged in contact with the printedcircuit board 15; in fact thestructural element 4 also act as a thermal dissipator and with its double T cross-section in thefirst section 31 and in themiddle 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 framedsupport 4. - The efficiency of the framed
support 4 as a thermal dissipator has been experimentally tested using a framedsupport 4 made of aluminum. The distribution of temperatures with all' theLEDs figure 4 : as it may be seen, the temperature close to the LEDs, i.e. in the section 31 (top part of the diagram offigure 4 ) is lower than 60°C, so ensuring a high efficiency to the LEDs and is around 40°C at the bottom of the framedsupport 4, i.e. at thesection 39. - All the aims of the invention are therefore accomplished.
Claims (10)
- A rotating lighting module (5) designed to equip a lighting device (1) for vehicles, comprising at least one first LED light source (6), at least one first reflector (7) and at least one first actuator (8) to rotate the first reflector relative to the first LED light source around a first axis (A); wherein a framed support (4) holds rigid in a fixed position said first LED light source (6) and bears in idling manner said first reflector (7); characterized in thati)- the at least one first LED light source (6) is operatively associated with the framed support in such a manner to transfer thereto by heat conduction at least a major part of a thermal flow generated in operation by the first LED light source; and in that, in combination,ii)- the framed support (4) is made entirely of a heat conductive metal or metal alloy and is designed to behave as a thermal dissipator.
- A rotating lighting module (5) as claimed in claim 1, characterized in thatiii)- at least a first section (31) of the framed support closer to the at least one first LED light source (6) has a solid cross-section provided with projecting lateral extensions (32).
- A rotating lighting module (5) as claimed in claim 1 or 2, characterized in that the framed support (4) is made entirely of a press-molded alloy of aluminum or of another light alloy, possibly including copper.
- A rotating lighting module (5) as claimed in anyone of the preceding claims, characterized in that the framed support (4) is formed by the side by side junction, via removable transversal fixing elements, 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, when joined, forming a first section (31) of the framed support, closer to the first LED light source and having a double T cross-section formed by the joined two C-shaped cross sections of the two structural elements (33,34) arranged facing opposite to each other, while the middle sections of two structural elements, when joined, forming a middle section (38) of the framed support, also having a double T cross-section formed by the joined two C-shaped cross sections of the two structural elements arranged facing opposite to each other; the second end sections of the two structural elements, when joined, forming a second section (39) of the framed support, farthest away from the first LED light source and having a box-like shape in order to idly receive the said first reflector (7).
- A rotating lighting module as claimed in claim 4, characterized in that it further comprises a couple of second LED light sources (13) and a third LED light source (14), wherein all the said first, second and third LED light sources (6,13,14) are assembled on a printed circuit board (15) which is carried in a fixed manner by said framed support (4) directly above the rotating first reflector and on the side opposite to said first actuator (8); the printed circuit board (15) being assembled onto said first section (31) of the framed support, in thermal contact therewith.
- A rotating lighting module according to claim 5, characterized in that the third LED light source (14) is an RGB LED and is arranged at a rear end (29) of the printed circuit board (15) opposite to the couple of second light sources (13), the first LED light source being arranged between the second and third LED light sources; the framed support (4) bearing at the middle portion thereof a second reflector (30) operatively associated with the third light source (14) and arranged on the rear of the first reflector (7) and spaced apart thereof; the second reflector (30) being made preferably of a metal.
- A rotating lighting module (5) as claimed in anyone of the preceding claims 5 or 6, characterized in that said 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 thinner that the middle section (38) so as to provide a step (45) between the first and middle section.
- Lighting device (1) for a vehicle such as a headlight or a headlamp, characterized in that it comprises at least one rotating lighting module (5) according to anyone of the preceding claims arranged within a cup-shaped housing (2) designed to be mounted on a vehicle body and facing a front inlet opening (3) of the cup-shaped housing.
- Lighting device (1) according to claim 8, characterized in that it comprised two or more rotating lighting modules (5) according to anyone of the preceding claims arranged side by side, each rotating lighting module having its own framed support (4) mechanically connected to a transverse rail (46) preferably made of metal and arranged substantially parallel to a width of the inlet opening.
- Vehicle provided with a lighting device (1) according to claim 8 or 9.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17154083.4A EP3354971B1 (en) | 2017-01-31 | 2017-01-31 | Lighting device for vehicles provided with led lighting modules |
CN201810097039.8A CN108916800B (en) | 2017-01-31 | 2018-01-31 | Vehicle lighting device with LED lighting module |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17154083.4A EP3354971B1 (en) | 2017-01-31 | 2017-01-31 | Lighting device for vehicles provided with led lighting modules |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3354971A1 true EP3354971A1 (en) | 2018-08-01 |
EP3354971B1 EP3354971B1 (en) | 2021-06-30 |
Family
ID=57963033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17154083.4A Active EP3354971B1 (en) | 2017-01-31 | 2017-01-31 | Lighting device for vehicles provided with led lighting modules |
Country Status (2)
Country | Link |
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EP (1) | EP3354971B1 (en) |
CN (1) | CN108916800B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113775964A (en) * | 2021-09-10 | 2021-12-10 | 厦门东昂科技股份有限公司 | Ultra-thin type modularization system based on LED lamps and lanterns circuit |
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JP2008010265A (en) * | 2006-06-28 | 2008-01-17 | Ichikoh Ind Ltd | Headlamp for vehicle |
US20080266890A1 (en) * | 2007-04-26 | 2008-10-30 | Koito Manufacturing Co., Ltd. | Vehicle lamp |
EP2386794A2 (en) * | 2010-05-12 | 2011-11-16 | Ichikoh Industries, Ltd. | Vehicle lighting device |
EP2902701A1 (en) | 2014-02-04 | 2015-08-05 | Valeo Vision | Rotary lighting and/or signalling module with stationary light source |
DE102015206755A1 (en) * | 2014-11-04 | 2016-05-04 | Hyundai Motor Company | vehicle light |
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US9518711B2 (en) * | 2011-09-27 | 2016-12-13 | Truck-Lite Co., Llc | Modular headlamp assembly |
TWI565605B (en) * | 2012-02-20 | 2017-01-11 | 鴻海精密工業股份有限公司 | Vehicle headlamp modulef |
CN104100905B (en) * | 2014-06-19 | 2016-07-13 | 安徽湛蓝光电科技有限公司 | LED automobile distance-light integration headlight |
FR3036687B1 (en) * | 2015-05-28 | 2019-01-25 | Zodiac Aero Electric | LIGHTING DEVICE FOR AN AIRCRAFT FOR THE INTEGRATION OF ADDITIONAL FUNCTIONS IN ITS CENTER |
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2017
- 2017-01-31 EP EP17154083.4A patent/EP3354971B1/en active Active
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JP2008010265A (en) * | 2006-06-28 | 2008-01-17 | Ichikoh Ind Ltd | Headlamp for vehicle |
US20080266890A1 (en) * | 2007-04-26 | 2008-10-30 | Koito Manufacturing Co., Ltd. | Vehicle lamp |
EP2386794A2 (en) * | 2010-05-12 | 2011-11-16 | Ichikoh Industries, Ltd. | Vehicle lighting device |
EP2902701A1 (en) | 2014-02-04 | 2015-08-05 | Valeo Vision | Rotary lighting and/or signalling module with stationary light source |
DE102015206755A1 (en) * | 2014-11-04 | 2016-05-04 | Hyundai Motor Company | vehicle light |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN113775964A (en) * | 2021-09-10 | 2021-12-10 | 厦门东昂科技股份有限公司 | Ultra-thin type modularization system based on LED lamps and lanterns circuit |
CN113775964B (en) * | 2021-09-10 | 2023-10-10 | 厦门东昂科技股份有限公司 | Ultrathin modularized system based on LED lamp circuit |
Also Published As
Publication number | Publication date |
---|---|
CN108916800A (en) | 2018-11-30 |
EP3354971B1 (en) | 2021-06-30 |
CN108916800B (en) | 2023-04-14 |
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