DE102008003915A1 - Headlight for motor vehicle, has rotational parabolic reflector collecting light of LED, where diameter of cooling tube is not larger than diameter of housing of LED, and shading of useful radiation is not larger than by LED - Google Patents
Headlight for motor vehicle, has rotational parabolic reflector collecting light of LED, where diameter of cooling tube is not larger than diameter of housing of LED, and shading of useful radiation is not larger than by LED Download PDFInfo
- Publication number
- DE102008003915A1 DE102008003915A1 DE102008003915A DE102008003915A DE102008003915A1 DE 102008003915 A1 DE102008003915 A1 DE 102008003915A1 DE 102008003915 A DE102008003915 A DE 102008003915A DE 102008003915 A DE102008003915 A DE 102008003915A DE 102008003915 A1 DE102008003915 A1 DE 102008003915A1
- Authority
- DE
- Germany
- Prior art keywords
- led
- diameter
- larger
- housing
- headlight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- F21V29/50—Cooling arrangements
- F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
- F21S2/005—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
-
- 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
- F21S41/141—Light emitting diodes [LED]
- F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
- F21S41/145—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device the main emission direction of the LED being opposite to the main emission direction of the illuminating 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
- 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
- F21S41/141—Light emitting diodes [LED]
- F21S41/155—Surface emitters, e.g. organic light emitting diodes [OLED]
-
- 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
- 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
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/0008—Reflectors for light sources providing for indirect lighting
-
- 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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/06—Optical design with parabolic curvature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- 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)
Abstract
Description
Problemstellung und Stand der TechnikProblem definition and state of the technique
Lichtemittierende Dioden (LED) stehen seit kurzem mit so hohen Lichtausbeuten zur Verfügung, dass sie anstelle von Glühlampen oder Entladungslampen für Beleuchtungszwecke eingesetzt werden können.Light-emitting diodes (LED) are available recently with such high luminous efficiencies that instead of incandescent or discharge lamps for Lighting purposes can be used.
Die Effizienz beträgt bis zu 100 Lumen/Watt [lm/W]. Eine einzelne Hochleistungs-LED kann rein-weißes Licht mit einem Lichtstrom bis zu 240 lm erzeugen.The Efficiency is up to 100 lumens / watt [lm / W]. A single one High power LED can be pure white light with a luminous flux generate up to 240 lm.
Die technologische Entwicklung auf dem LED-Gebiet geht z. Zt. mit großen Schritten voran, so dass in naher Zukunft noch deutliche Leistungssteigerungen zu erwarten sind. Bei der Raumbeleuchtung, der Effektbeleuchtung von Gebäuden und der Kraftfahrzeug-Technik (Instrumentenbeleuchtung und Rückleuchten) haben LEDs heute schon ihren Platz gefunden. Im Jahr 2008 wird der erste mit Hochleistungs-LEDs betriebene KFZ-Fahrscheinwerfer serienmäßig verfügbar sein.The technological development in the LED field goes z. Zt. With large Steps ahead, so that in the near future still significant performance gains are to be expected. In the room lighting, the effect lighting of buildings and automotive engineering (instrument lighting and Taillights) LEDs have already found their place today. In 2008 will be the first car driving lights powered by high-power LEDs be available as standard.
Das Hauptproblem bei der Entwicklung praxistauglicher LED-Leuchtmittel ist die Beherrschung der Wärmeabfuhr, da LEDs nicht, wie Glühlampen, bei höheren Temperaturen betrieben werden können. Die Effizienz einer LED hängt stark von ihrer Betriebstemperatur ab, weshalb eine Ankopplung an die Umbebungstemperatur mit möglichst geringen Temperaturunterschied angestrebt werden muss. Die Verlustwärme einer LED fällt wegen der geringen Baugröße räumlich konzentriert an. Sie muss unter Verwendung gut wärmeleitender Materialien auf eine größere Oberfläche verteilt werden. Im allgemeinen werden dabei mit Rippen besetzte Kühlkörper oder größere Kühlplatinen eingesetzt. Beim Design eines dem jeweiligen Einsatzfall angepassten optischen Lichtsammelsystems sind diese geometrischen Randbedingungen zu beachten.The Main problem in the development of practical LED bulbs is the mastery of heat dissipation, since LEDs are not, like Incandescent lamps, operated at higher temperatures can be. The efficiency of an LED depends heavily From their operating temperature, which is why a coupling to the ambient temperature sought with the lowest possible temperature difference must become. The heat loss of an LED drops because of the small size spatially concentrated. It must be made using good heat conducting Materials on a larger surface be distributed. In general, it will be occupied by ribs Heatsink or larger cooling boards used. In the design of a customized application optical light collection system are these geometric boundary conditions to be observed.
In
der Gebrauchsmusterschrift
Die
Offenlegungsschrift
Die
Gebrauchsmusterschrift
Eine
heute übliche Anordnung zur Konzentration von LED-Licht
in einen mehr oder weniger gebündelten Strahl wird in der
Gebrauchsmusterschrift
Bei einem Fernscheinwerfermuss der optische Strahlengang so ausgelegt werden, dass Verzerrungen und Abbildungsfehler weitgehend vermieden werden. Die leuchtende Fläche der LED muss möglichst verzeichnungsfrei auf einen weit entfernten Punkt abgebildet werden.at a high beam headlamp, the optical beam path must be designed be that distortions and aberrations largely avoided become. The luminous surface of the LED must be as possible be imaged without distortion on a distant point.
Diese Forderung wird mit der nachfolgend beschriebenen, erfindungsgemäßen Ausführung eines LED-Fernscheinwerfers erfüllt.These Claim is with the invention described below Execution of a LED remote spotlight fulfilled.
Erfindungsgemäße Ausführunginvention execution
Zur
Erzielung einer möglichst rotationssymmetrischen Anordnung
wird, wie in
Die beleuchtete Fläche weist einen scharf abgegrenzten Hell-Dunkel-Übergang auf, was den Scheinwerfer in der erfindungsgemäßen Ausführung insbesondere auch für KFZ-Frontscheinwerfer geeignet macht.The illuminated area has a sharply defined light-dark transition, which is the headlamp in the embodiment of the invention makes especially suitable for vehicle headlights.
Der
Nachteil der Anordnung liegt daran, dass auf der optischen Achse
durch die LED eine Abschattung gegeben ist, durch die eine Verminderung
der Lichtleistung erfolgt. Um diese möglichst gering zu halten,
wird die LED auf einen stabförmigen Kühlkörper
[
Falls
der Kühlstab kürzer gehalten werden soll, kann
er, wie in
In
einer weiteren Version kann der Kühlkörper aus
nur einem einzigen Kühlblech bestehen, dessen Dicke so
gewählt wird, dass eine ausreichende Wärmeabfuhr
gegeben ist. Dieses Kühlblech kann zur Verbesserung der
Wärmeabfuhr in gutem thermischen Kontakt zu dem Scheinwerfergehäuse
[
Mit heute kommerziell verfügbaren Bauteilen (LEDs und Spiegel) kann ein solcher Handscheinwerfer aufgebaut werden, der z. B. einen Lichtstrom von 200 Lumen [lm] bei einem typischen Öffnungswinkel von 1°–2° abgibt. Das bedeutet eine Lichtstärke von mehr als 105 Candela [cd]. Dies mit einem elektrischen Leistungsaufwand von nur 3 W.With today commercially available components (LEDs and mirrors), such a handheld spotlight can be constructed, the z. B. outputs a luminous flux of 200 lumens [lm] at a typical opening angle of 1 ° -2 °. This means a light intensity of more than 10 5 candela [cd]. This with an electrical power consumption of only 3 W.
In naher Zukunft werden Bauelemente mit höherem Leistungsumsatz und damit höherer Lichtleistung verfügbar sein. Bereits heute ist die Lichtleistung einer LED für den Betrieb eines Handscheinwerfers ausreichend.In In the near future, components with higher power conversion will become available and thus be available higher light output. Even today, the light output of an LED is for operation a handheld projector sufficient.
Für
Scheinwerfer mit wesentlich höheren Lichtleistungen können
einzelne Lichtzellen gebündelt werden. Dies können
entsprechend
Die
Gesamtlichtleistung solcher Scheinwerfer lässt sich durch
Hinzufügen weiterer Zellen bis zu sehr großen
Werten steigern. In einer bevorzugten Anordnungen sollen mit 19-zellige
Scheinwerfer zu einem Großscheinwerfer zusammengefügt
werden. In
Ein wichtiger Vorteil ergibt sich bei der o. g. Konstruktionsweise eines Großscheinwerfers durch die Verwendung sehr vieler gleichartiger Bauteile durch die Möglichkeit der Serienproduktion und dadurch bedingter Kostenreduktion der Komponenten.One important advantage arises in the o. g. Construction of a Large headlamps through the use of many more similar Components through the possibility of mass production and consequent cost reduction of the components.
Ein weiterer praktischer Vorteil ergibt sich dadurch, dass Unterbaugruppen jeweils gezielt in ihrer Ausstrahlungsrichtung verstellt werden können. Damit kann die beleuchtete Fläche im Fernfeld definiert den Erfordernissen angepasst werden. Es kann z. B. ein Leuchtkreis, eine Leuchtlinie oder ein Leuchtkreuz realisiert werden.One Another practical advantage arises from the fact that subassemblies each be selectively adjusted in their direction of emission can. This allows the illuminated area in the far field be adapted to the requirements. It can, for. B. a Illuminated circle, a luminous line or a light cross can be realized.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 202006009553 U1 [0005] - DE 202006009553 U1 [0005]
- - DE 102006051029 A1 [0006] DE 102006051029 A1 [0006]
- - DE 202006008290 U1 [0007] - DE 202006008290 U1 [0007]
- - DE 20310315 U1 [0008] - DE 20310315 U1 [0008]
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008003915A DE102008003915A1 (en) | 2008-01-10 | 2008-01-10 | Headlight for motor vehicle, has rotational parabolic reflector collecting light of LED, where diameter of cooling tube is not larger than diameter of housing of LED, and shading of useful radiation is not larger than by LED |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008003915A DE102008003915A1 (en) | 2008-01-10 | 2008-01-10 | Headlight for motor vehicle, has rotational parabolic reflector collecting light of LED, where diameter of cooling tube is not larger than diameter of housing of LED, and shading of useful radiation is not larger than by LED |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008003915A1 true DE102008003915A1 (en) | 2009-07-23 |
Family
ID=40785708
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008003915A Withdrawn DE102008003915A1 (en) | 2008-01-10 | 2008-01-10 | Headlight for motor vehicle, has rotational parabolic reflector collecting light of LED, where diameter of cooling tube is not larger than diameter of housing of LED, and shading of useful radiation is not larger than by LED |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102008003915A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011119379A1 (en) * | 2011-11-25 | 2013-05-29 | Volkswagen Aktiengesellschaft | Lighting device for a motor vehicle |
GB2497724A (en) * | 2011-12-08 | 2013-06-26 | Nissan Motor Mfg Uk Ltd | Lighting unit mounting for a vehicle |
DE102012020931A1 (en) * | 2012-10-25 | 2014-04-30 | Rüdiger Lanz | High power head lamp for use as military searchlight, has high power light emitting diode light source and reflector, where tightly packed light emitting diode chip is used with light radiation as high-power light emitting diode lamp |
DE102012219162A1 (en) * | 2012-10-19 | 2014-05-08 | Automotive Lighting Reutlingen Gmbh | Motor vehicle headlight with light source and a cooling device for the light source |
US10125943B2 (en) | 2014-03-12 | 2018-11-13 | Volkswagen Aktiengesellschaft | Motor vehicle and motor vehicle headlamp with a front housing |
US11603976B2 (en) | 2021-02-08 | 2023-03-14 | Volkswagen Aktiengesellschaft | Motor vehicle headlamp and method for operating a motor vehicle headlamp |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20310315U1 (en) | 2003-07-04 | 2003-12-04 | Shu, Kuo Fen | Spotlight using LED projecting into cavity in plastics combined lens and reflector has integrated circuit card holding LED and accommodated in housing shaped as electrical plug |
EP1459934A2 (en) * | 2003-03-17 | 2004-09-22 | DaimlerChrysler AG | Vehicle headlamp |
DE202005007501U1 (en) * | 2005-05-12 | 2005-08-18 | Automotive Lighting Reutlingen Gmbh | Vehicle light, consists of at least one light diode chip mechanically and electrically fixed to a circuit board |
DE102004046764A1 (en) * | 2004-09-24 | 2006-04-06 | Daimlerchrysler Ag | vehicle headlights |
DE202006008290U1 (en) | 2006-05-24 | 2006-08-31 | Heser, Karl | Radial LED-beam lamp e.g. specially for sea diving, has LEDs thermally coupled via highly heat-conductive material |
DE202006009553U1 (en) | 2006-06-16 | 2006-08-31 | Chien, Chen-Chun, Sansia | Light-emitting diode module for vehicle headlamps, includes heat sink surrounding and dissipating heat from main body, with radial fins shaped to fit inside headlamp housing |
DE102006051029A1 (en) | 2005-10-25 | 2007-07-12 | Visteon Global Technologies, Inc., Van Buren | Bifunctional LED headlight |
DE102007028301A1 (en) * | 2007-06-20 | 2007-12-13 | Daimlerchrysler Ag | Vehicle headlight has housing and semiconductor light source, which is arranged in housing and is thermally connected with heat sink by heat pipe |
-
2008
- 2008-01-10 DE DE102008003915A patent/DE102008003915A1/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1459934A2 (en) * | 2003-03-17 | 2004-09-22 | DaimlerChrysler AG | Vehicle headlamp |
DE20310315U1 (en) | 2003-07-04 | 2003-12-04 | Shu, Kuo Fen | Spotlight using LED projecting into cavity in plastics combined lens and reflector has integrated circuit card holding LED and accommodated in housing shaped as electrical plug |
DE102004046764A1 (en) * | 2004-09-24 | 2006-04-06 | Daimlerchrysler Ag | vehicle headlights |
DE202005007501U1 (en) * | 2005-05-12 | 2005-08-18 | Automotive Lighting Reutlingen Gmbh | Vehicle light, consists of at least one light diode chip mechanically and electrically fixed to a circuit board |
DE102006051029A1 (en) | 2005-10-25 | 2007-07-12 | Visteon Global Technologies, Inc., Van Buren | Bifunctional LED headlight |
DE202006008290U1 (en) | 2006-05-24 | 2006-08-31 | Heser, Karl | Radial LED-beam lamp e.g. specially for sea diving, has LEDs thermally coupled via highly heat-conductive material |
DE202006009553U1 (en) | 2006-06-16 | 2006-08-31 | Chien, Chen-Chun, Sansia | Light-emitting diode module for vehicle headlamps, includes heat sink surrounding and dissipating heat from main body, with radial fins shaped to fit inside headlamp housing |
DE102007028301A1 (en) * | 2007-06-20 | 2007-12-13 | Daimlerchrysler Ag | Vehicle headlight has housing and semiconductor light source, which is arranged in housing and is thermally connected with heat sink by heat pipe |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011119379A1 (en) * | 2011-11-25 | 2013-05-29 | Volkswagen Aktiengesellschaft | Lighting device for a motor vehicle |
GB2497724A (en) * | 2011-12-08 | 2013-06-26 | Nissan Motor Mfg Uk Ltd | Lighting unit mounting for a vehicle |
DE102012219162A1 (en) * | 2012-10-19 | 2014-05-08 | Automotive Lighting Reutlingen Gmbh | Motor vehicle headlight with light source and a cooling device for the light source |
DE102012020931A1 (en) * | 2012-10-25 | 2014-04-30 | Rüdiger Lanz | High power head lamp for use as military searchlight, has high power light emitting diode light source and reflector, where tightly packed light emitting diode chip is used with light radiation as high-power light emitting diode lamp |
DE102012020931B4 (en) | 2012-10-25 | 2022-10-20 | Rüdiger Lanz | High-performance headlights with high-performance LED bulbs |
US10125943B2 (en) | 2014-03-12 | 2018-11-13 | Volkswagen Aktiengesellschaft | Motor vehicle and motor vehicle headlamp with a front housing |
US11603976B2 (en) | 2021-02-08 | 2023-03-14 | Volkswagen Aktiengesellschaft | Motor vehicle headlamp and method for operating a motor vehicle headlamp |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8122 | Nonbinding interest in granting licences declared | ||
8130 | Withdrawal | ||
8165 | Publication of following application cancelled |