EP2834552A1 - Beleuchtungsvorrichtung für ein kraftfahrzeug - Google Patents
Beleuchtungsvorrichtung für ein kraftfahrzeugInfo
- Publication number
- EP2834552A1 EP2834552A1 EP13706251.9A EP13706251A EP2834552A1 EP 2834552 A1 EP2834552 A1 EP 2834552A1 EP 13706251 A EP13706251 A EP 13706251A EP 2834552 A1 EP2834552 A1 EP 2834552A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lighting device
- heat sink
- light source
- housing
- heat
- 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
- 238000005286 illumination Methods 0.000 title abstract description 4
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims description 32
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000003570 air Substances 0.000 description 35
- 238000011109 contamination Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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
- F21S45/42—Forced cooling
- F21S45/43—Forced cooling using gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/16—Laser light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
-
- 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
- F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
-
- 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
- F21S45/49—Attachment of the cooling means
-
- 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
Definitions
- the invention relates to a lighting device for a motor vehicle according to the preamble of claim 1.
- the object of the invention is therefore to provide an energy-efficient lighting device for a motor vehicle with a laser light source.
- the lighting device is intended for a motor vehicle, in particular a car and possibly also a truck. It comprises a light source of a number of laser diodes.
- the laser light source contains a plurality of laser diodes, preferably between three and eight laser diodes. Nevertheless, only a single laser diode can be provided.
- laser diodes with a respective power of at least 1 W and preferably between 1, 5 and 5 W are used.
- the lighting device further includes an optical device arranged in a housing for generating a predetermined light distribution from the light of the light source.
- the structure of such an optical device is known per se and may vary depending on the application.
- the lighting device is characterized in that a heat sink is provided, which is designed or arranged such that it absorbs heat generated during operation of the light source substantially without the interposition of the originating from the interior of the housing inside air and the heat absorbed to the outside
- the outside air originating from the housing in turn essentially emits without intervening the internal air.
- the heat sink thus ensures heat transfer from the light source to the outside air without the involvement of the inside air, which implies that the heat transfer takes place without mixing the outside air with the inside air.
- the term heat sink is to be understood as meaning here and in the following and may include a passive cooling device and optionally also an active cooling device (for example fan, Peltier element) or combinations of such cooling devices.
- the cooling capacity of a conventional cooling device can be increased by the use of outside air.
- the invention is based on the idea that a much better efficiency in the operation of the lighting device can be achieved via outside air as a cooling medium for the laser light source. It is also ensured that the outside air is not passed directly into the interior of the housing, because this would lead to an undesirable contamination of the sensitive optical surfaces of the optical device.
- the invention has particular advantages for a lighting device in which the light source is arranged inside the housing, since in this case the ambient temperature is very high and thus the cooling of the laser diodes of the light source is particularly important.
- the heat sink comprises a (passive) heat sink, for example made of metal or another good heat-conducting material, at which the heat generated during operation of the light source is dissipated.
- the heat sink preferably comprises surface-enlarging elements, in particular fins and / or ribs and / or pins.
- the heat sink may further be configured at least partially as a solid body and / or at least partially as a hollow body.
- the light Source preferably arranged on the heat sink, ie there is a direct contact between the light source and heat sink for the transmission of thermal energy.
- At least one cooling channel separated from the inner air is guided through the heat sink by the heat sink for transporting outside air through the heat sink.
- the heat sink thus comprises one or more inside
- Feedthroughs for transporting the outside air With this variant, the separation of the external air supply from the air inside the housing is achieved in a simple manner.
- a fan for supplying outside air to the heat sink is provided, wherein the fan is preferably arranged outside of the housing, so that good outdoor air can be passed to the heat sink.
- the lighting device in this case comprises the heat sink described above with at least one cooling channel, the fan is provided in a preferred variant in the cooling channel.
- the fan transports cooler air from a cooler point of the motor vehicle, in particular by means of a hose or air duct.
- the lighting device according to the invention is in a region of the outside of the heat sink and / or the cooling channel, where no
- Heat transfer between the light source and heat sink and / or cooling channel takes place, provided a thermal insulation. In this way it is prevented that in addition hot ambient air of the lighting device whose heat output is not from the light source, this heat sink or cooling channel thermally loaded.
- the cooling body described above is arranged in an embodiment of the invention entirely inside the housing of the lighting device. Nevertheless, it is also possible to design the heat sink such that it is at least partially disposed outside the housing.
- the heat sink used in the lighting device may also include a so-called.
- Heatpipe which is also referred to as a heat pipe.
- the functional principle of heatpipes is known per se.
- a heat pipe is a heat exchanger that uses heat of vaporization a substance allows efficient heat transfer.
- the light source is arranged on the heat pipe, ie the light source has a direct contact with the heat pipe.
- the heat generated during operation of the light source is dissipated via the heat pipe to an at least partially disposed outside of the housing heat sink, which may possibly correspond to the above-described heat sink. Due to the arrangement of the heat sink outside the housing, a cooling of the same is achieved by outside air, without the outside air is guided into the interior of the housing.
- monochromatic light is generated with the laser light source, wherein a conversion element for converting the light into white light is provided.
- conversion elements are known per se.
- a phosphorous conversion element of nitride-phosphorus or oxyditride-phosphorus or cerium-doped YAG phosphorus can be used to generate white light.
- the lighting device comprises a headlight.
- a headlight is characterized by the fact that it actively illuminates the surroundings of the vehicle.
- the lighting device according to the invention may also include a signal light, which is characterized in that it is used only for signaling to other road users.
- the illumination device is designed such that a low-beam light characteristic can be generated during operation as a predetermined light distribution.
- the lighting device can also be configured such that it generates a high-beam characteristic in operation as a predetermined light distribution.
- the invention further relates to a motor vehicle, which comprises one or more of the lighting devices according to the invention.
- FIG. 1 shows a schematic representation of an embodiment of the lighting device according to the invention in the form of a headlight.
- the headlight 1 of FIG. 1 is installed in a motor vehicle (not shown) in the front region and comprises a housing 3, in the interior of which a laser light source 2 and an optical device 4 are provided.
- the optical device is only schematically indicated as a lens and serves to generate from the light of the light source 2, a predetermined light distribution according to the functionality of the headlamp.
- a parallel light distribution is generated from the substantially punctiform laser light source 2, which is e.g. can represent a Femlicht characterizing.
- the course of the light rays is indicated by corresponding arrows P.
- the laser light source 2 comprises a number of laser diodes, which can be used compared to LEDs only up to a reduced housing temperature, as already mentioned above.
- a heat sink in the form of a ventilated heat sink 5 is used, on the outside of the laser light source 2 is arranged so that it is in direct contact with the heat sink.
- the heat sink is a hollow body, which consists of a good heat-conducting material and in particular of metal, in order to achieve a good heat transfer from the laser light source 2 to the heat sink.
- a cooling channel is guided in the embodiment of FIG. 1 through the heat sink 5, whose lower and upper end protrude from the housing 3 and are designated by the reference numeral 6.
- outside air is guided through the cooling channel, the guidance of the outside air being indicated schematically by the arrows F.
- the cooling channel is separated from the interior of the housing 3, so that it is ensured that the outside air used for cooling does not come into contact with the elements in the interior of the housing, whereby contamination of the laser light source or the sensitive optical elements of the optical device. 5 is prevented.
- a schematically indicated fan 7 is provided in the embodiment of FIG. 1 in the cooling channel 8, which is arranged outside the housing 3 of the headlight. This fan generates the air flow according to the arrows P '.
- the fan can also assume the function of a compressor and lead to a further cooling by a relaxation of the air in the interior of the heat sink 5.
- surface-enlarging elements in particular in the form of lamellae or ribs or pins, are preferably provided in order thereby to achieve good heat emission to the outside air guided in the cooling duct 8.
- the outside of the heat sink in the area in which there is no contact with the laser light source 2 thermally insulated, thereby avoiding that heat given off to the outside air is transferred back to the interior of the headlamp.
- corresponding mechanical means may be provided to allow a rotation or pivoting of the laser light source 2 and the optical device 4 within the housing 3, and thereby implement functionalities such as cornering light or adaptive cornering light.
- a mechanism (not shown) is provided which allows the rotation of the heat sink together with the laser light source.
- this can be a flexible
- Hose connection between the headlight housing 3 and internal cooler 5 are used.
- a heat pipe or a heat-conducting or metallic block can be used to cool the laser light source. At one end of the heat pipe or the block while the laser light source is provided, and the other end of the heat pipe or the block leads out of the housing of the headlamp and is thus cooled by outside air.
- the embodiment described above has a number of advantages.
- cooling of the laser light source to the permitted operating temperature is achieved in a simple manner by outside air.
- efficiency of the lighting device is improved.
- a direct exchange of cold, possibly polluted outside air with the hot, pure internal air in the housing of the lighting device is avoided. Such an exchange would lead to contamination of the sensitive optical elements. ments in the interior of the lighting device and thus lead to an impairment of the operation of the lighting device.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012205434A DE102012205434A1 (de) | 2012-04-03 | 2012-04-03 | Beleuchtungsvorrichtung für ein Kraftfahrzeug |
PCT/EP2013/053681 WO2013149764A1 (de) | 2012-04-03 | 2013-02-25 | Beleuchtungsvorrichtung für ein kraftfahrzeug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2834552A1 true EP2834552A1 (de) | 2015-02-11 |
EP2834552B1 EP2834552B1 (de) | 2019-06-19 |
Family
ID=47750683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13706251.9A Active EP2834552B1 (de) | 2012-04-03 | 2013-02-25 | Beleuchtungsvorrichtung für ein kraftfahrzeug |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2834552B1 (de) |
DE (1) | DE102012205434A1 (de) |
WO (1) | WO2013149764A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3046660B1 (fr) * | 2015-11-27 | 2022-01-21 | Valeo Vision | Module d'eclairage de projecteur de vehicule automobile et projecteur associe |
DE102016000978A1 (de) * | 2016-01-29 | 2017-08-03 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Scheinwerfervorrichtung |
FR3048487B1 (fr) * | 2016-03-02 | 2019-05-24 | Valeo Vision | Dispositif d'eclairage pour vehicule automobile comprenant des modules lumineux refroidis au moyen d'un generateur d'un flux d'air |
DE102016005936B4 (de) * | 2016-05-14 | 2018-04-26 | Audi Ag | Beleuchtungsvorrichtung für ein Kraftfahrzeug, Kraftfahrzeug und Verfahren zum Kühlen einer Beleuchtungsvorrichtung für ein Kraftfahrzeug |
US10066801B1 (en) * | 2017-10-04 | 2018-09-04 | Osram Sylvania Inc. | Vehicle lamp reflector having ventilation channel adjacent lamp capsule |
DE102020128555A1 (de) | 2020-10-30 | 2022-05-05 | Bayerische Motoren Werke Aktiengesellschaft | Beleuchtungsvorrichtung für ein Kraftfahrzeug |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004127782A (ja) * | 2002-10-04 | 2004-04-22 | Ichikoh Ind Ltd | 車両用灯具および灯火装置 |
JP4265560B2 (ja) * | 2005-03-31 | 2009-05-20 | 市光工業株式会社 | 車両用灯具 |
JP4527024B2 (ja) * | 2005-07-28 | 2010-08-18 | 株式会社小糸製作所 | 車両用灯具 |
US7427152B2 (en) * | 2005-12-05 | 2008-09-23 | Visteon Global Technologies, Inc. | Headlamp assembly with integrated housing and heat sink |
AU2006349349A1 (en) * | 2006-10-10 | 2008-04-17 | Neobulb Technologies, Inc. | A semiconductor light-emitting module |
DE102006052220A1 (de) * | 2006-11-06 | 2008-05-08 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Kfz-Scheinwerfer |
DE102007028301A1 (de) * | 2007-06-20 | 2007-12-13 | Daimlerchrysler Ag | Fahrzeugscheinwerfer mit Halbleiterlichtquelle |
SI22617B (sl) * | 2007-10-12 | 2014-12-31 | Hella Saturnus Slovenija, Proizvodnja Svetlobne Opreme Za Motorna In Druga Vozila, D.O.O. | Svetilo, zlasti za motorna vozila |
KR20110137993A (ko) * | 2010-06-18 | 2011-12-26 | 현대자동차주식회사 | Led 헤드램프의 방열구조 |
-
2012
- 2012-04-03 DE DE102012205434A patent/DE102012205434A1/de not_active Withdrawn
-
2013
- 2013-02-25 WO PCT/EP2013/053681 patent/WO2013149764A1/de active Application Filing
- 2013-02-25 EP EP13706251.9A patent/EP2834552B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2013149764A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013149764A1 (de) | 2013-10-10 |
DE102012205434A1 (de) | 2013-10-10 |
EP2834552B1 (de) | 2019-06-19 |
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