DE19962214A1 - Headlamp has condensation protection device with covering panels at defined distance apart with air inlet and outlet openings allowing passage of air through gap between panels - Google Patents

Headlamp has condensation protection device with covering panels at defined distance apart with air inlet and outlet openings allowing passage of air through gap between panels

Info

Publication number
DE19962214A1
DE19962214A1 DE19962214A DE19962214A DE19962214A1 DE 19962214 A1 DE19962214 A1 DE 19962214A1 DE 19962214 A DE19962214 A DE 19962214A DE 19962214 A DE19962214 A DE 19962214A DE 19962214 A1 DE19962214 A1 DE 19962214A1
Authority
DE
Germany
Prior art keywords
air
headlamp
panels
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.)
Ceased
Application number
DE19962214A
Other languages
German (de)
Inventor
Hans-Peter Bailer
Martin Enders
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE19962214A priority Critical patent/DE19962214A1/en
Publication of DE19962214A1 publication Critical patent/DE19962214A1/en
Ceased legal-status Critical Current

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
    • F21V29/90—Heating arrangements
    • 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
    • F21S45/30—Ventilation or drainage of lighting devices
    • F21S45/33—Ventilation or drainage of lighting devices specially adapted for headlamps
    • 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
    • F21S45/60—Heating of lighting devices, e.g. for demisting
    • 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

Abstract

The device has a housing (1) and a covering panel (2) for the light outlet opening and a condensation protection device for preventing condensation on the optical surfaces in the headlamp housing. A second covering panel (3) is arranged at a defined distance from the first panel and air inlet and outlet openings (4) allow the passage of air through the volume (10) between the covering panels.

Description

Die Erfindung bezieht sich auf eine Scheinwerferbetauungsschutz-Vorrichtung für Scheinwerfer eines Kraftfahrzeugs nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a headlight condensation protection device for Headlights of a motor vehicle according to the preamble of patent claim 1.

Beim Absinken der Lufttemperatur unter den Taupunkt entsteht durch Kondensation von Wasserdampf an einer kalten Wand ein Niederschlag oder Tau. Dieser Nieder­ schlag bildet kleine Tröpfchen, die sich bei einem Fahrzeug insbesondere an den Scheiben der Fahrgastzelle und an der Abdeckscheibe in den Scheinwerfern nie­ derschlagen und bei besonders tiefen Temperaturen anfrieren können. Bei den Scheinwerfern führt kondensierter Wasserdampf zu einer stärker gestreuten Lichtabstrahlung des Scheinwerfers und damit zu ungünstiger Fahrbahnausleuch­ tung.When the air temperature drops below the dew point, condensation occurs of water vapor on a cold wall a precipitate or dew. That low Impact forms small droplets that stick to the vehicle in particular Windows in the passenger compartment and on the cover window in the headlights never and can freeze at particularly low temperatures. Both Headlights condensed water vapor leads to a more scattered Light emission from the headlamp and thus an unfavorable illumination of the road tung.

Es ist Aufgabe der Erfindung, einen Fahrzeugscheinwerfer zu schaffen, der mit ge­ ringem Aufwand das Kondensieren von Wasserdampf im Scheinwerfergehäuse verhindert.It is an object of the invention to provide a vehicle headlight with ge with little effort the condensation of water vapor in the headlight housing prevented.

Dieses Ziel wird mit einem Fahrzeugscheinwerfer mit einer Betauungsschutzvor­ richtung nach Anspruch 1 erreicht. Die Unteransprüche beziehen sich auf vorteil­ hafte Ausführungsformen bzw. Weiterentwicklungen des erfindungsgemässen Fahr­ zeugscheinwerfers.This goal is achieved with a vehicle headlight with a condensation protection direction reached according to claim 1. The subclaims relate to advantage sticky embodiments or further developments of the driving according to the invention headlights.

Die Scheinwerfer-Abdeckscheibe wird als "offene Doppelverglasung" ausgeführt. Die innere Abdeckscheibe kann vorteilhafterweise durch schmale Stege mit der äu­ ßeren Abdeckscheibe verbunden sein, um eine freie Konvektion zwischen den bei­ den Scheiben zu ermöglichen. Durch die Konvektion wird verhindert, dass sich kon­ densierter Wasserdampf an der (den) Scheibe(n) absetzt.The headlamp cover is designed as "open double glazing". The inner cover plate can advantageously by narrow webs with the outer Outer cover plate to be connected to free convection between the  to enable the disks. Convection prevents con dense water vapor settles on the disc (s).

Eine bevorzugte Ausführungsform des erfindungsgemässe Scheinwerfers umfasst eine Heizvorrichtung zum Erzeugen vorgeheizter Luft in dem Scheinwerfergehäuse. Dabei kann es sich um eine einfache elektrische Heizung des gesamten Schein­ werfers handeln, deren Heizdrähte in geeigneter Art und Weise um das Scheinwer­ fergehäuse herum ausserhalb des eigentlichen Scheinwerfers angeordnet sind, mit der der Scheinwerfer als ganzes gleichmässig auf eine Temperatur über dem Tau­ punkt gebracht wird.A preferred embodiment of the headlamp according to the invention comprises a heater for generating preheated air in the headlamp housing. This can be a simple electrical heating of the entire bill throwers, their heating wires in a suitable manner around the headlight are arranged around outside of the actual headlight, with the headlamp as a whole evenly to a temperature above the rope point is brought.

Bei einer weiteren bevorzugten Ausführungsform des erfindungsgemässen Schein­ werfers umfasst das Scheinwerfergehäuse mehrere Öffnungen für die Luftzirkulation im Gehäuse. Dabei wirkt wenigstens eine Öffnung als Luftzufuhrdüse und wenig­ stens eine Öffnung als Luftauslassöffnung.In a further preferred embodiment of the note according to the invention thrower, the headlight housing includes several openings for air circulation in the housing. At least one opening acts as an air supply nozzle and little at least one opening as an air outlet opening.

Die Erfindung wird im folgenden anhand eines in der einzigen Figur dargestellten Ausführungsbeispiels näher erläutert.The invention is illustrated below with reference to one in the single figure Embodiment explained in more detail.

Die Figur zeigt als eine Ausführungsform des erfindungsgemässen Scheinwerfers einen linken Scheinwerfer eines Fahrzeugs in Draufsicht. Der Scheinwerfer umfasst ein Scheinwerfergehäuse 1, das ihn vom dahinter liegenden Fahrzeugraum trennt. Nach vorne ist das Scheinwerfergehäuse 1 durch eine transparente erste Abdeck­ scheibe 2 abgeschlossen. In dem Scheinwerfergehäuse 1 befinden sich Sockel für eine Abblendlichtleuchte 5a und eine Fernlichtleuchte 5b. Die Sockel für die Leuch­ ten 5a und 5b weisen jeweils einen Reflektor 5 und 5' auf, der das von der Leuchte 5a oder 5b nach hinten abgestrahlte Licht für die Fahrbahnausleuchtung als quasi parallelen Lichtstrahl nach vorne oder für die Seitenausleuchtung teilweise zur Seite lenkt. As an embodiment of the headlight according to the invention, the figure shows a left headlight of a vehicle in plan view. The headlamp comprises a headlamp housing 1 which separates it from the vehicle compartment located behind it. Forward the lamp housing 1 is constituted by a transparent first covering disc 2 completed. In the headlight housing 1 there are bases for a low beam lamp 5 a and a high beam lamp 5 b. The base for the lights th 5 a and 5 b each have a reflector 5 and 5 ', the light emitted by the light 5 a or 5 b to the rear for the road illumination as a quasi-parallel light beam to the front or for the side illumination partially Side steers.

Je nach Umgebungstemperatur kann es auf der Innenseite der Abdeckscheibe 2, d. h. auf der optischen Oberfläche 6 der Abdeckscheibe 2 in dem Scheinwerfergehäu­ se 1 je nach Partialdruck des Wasserdampfes in der Luft zur Kondensation von Wasserdampf mit den bereits oben genannten Nachteilen und Gefahren kommen: das Wasser kann an der optischen Oberfläche 6 der Abdeckscheibe 2 u. U. gefrie­ ren und die optische Transparenz der Abdeckscheibe 2 beeinträchtigen.Depending on the ambient temperature, condensation of water vapor can occur on the inside of the cover plate 2 , ie on the optical surface 6 of the cover plate 2 in the headlight housing 1, depending on the partial pressure of the water vapor in the air, with the disadvantages and dangers already mentioned above: the water can on the optical surface 6 of the cover plate 2 u. U. frozen and impair the optical transparency of the cover plate 2 .

Um die Kondensation von Wasserdampf auf der optischen Oberfläche 6 zu unter­ binden bzw. schnell rückgängig zu machen, weist der erfindungsgemässe Schein­ werfer eine zweite Abdeckscheibe 3 auf, die in definiertem Abstand von der Ab­ deckscheibe 2 angeordnet ist und durch schmale Stege (nicht dargestellt) gehalten ist. Zwei Belüftungsöffnungen 4 verbinden den zwischen den beiden Abdeckschei­ ben 2 und 3 gebildeten Luftraum 10 mit dem übrigen Innenraum des Scheinwerfer­ gehäuses 1. Dieser besitzt zur umgebenden Atmosphäre hin eine Luftzufuhröffnung 8 und eine Luftabsaugöffnung 9.In order to prevent or quickly undo the condensation of water vapor on the optical surface 6 , the headlamp according to the invention has a second cover plate 3 , which is arranged at a defined distance from the cover plate 2 and by narrow webs (not shown) is held. Two ventilation openings 4 connect the air space 10 formed between the two cover plates ben 2 and 3 to the rest of the interior of the headlight housing 1 . This has an air supply opening 8 and an air extraction opening 9 to the surrounding atmosphere.

Die Luftzufuhröffnung 8 und die Luftauslassöffnung 9 sind so geformt, dass im Zu­ sammenspiel mit dem zwischen den beiden Abdeckscheiben befindlichen Luftvolu­ men 10 sich Luftströme im Scheinwerfergehäuse ergeben, die möglichst vollständig die optische Oberfläche 6 überstreichen und so darauf eine Niederschlagsbildung verhindern. Solche Luftströme sind mit Pfeilen angedeutet. Ein zusätzliches, nicht dargestelltes Gebläse, welches im Inneren des Scheinwerfergehäuses 1 für den Luftaustausch sorgt, erzeugt im Scheinwerfergehäuse 1 einen Überdruck mit des­ sen Hilfe zusätzlich das Eindringen von Feuchtigkeit oder Schmutz durch andere im Scheinwerfergehäuse 1 vorhandene Öffnungen als die Einlassöffnung 8 vermieden wird.The air supply opening 8 and the air outlet opening 9 are shaped in such a way that in cooperation with the air volume between the two cover disks 10 there are air currents in the headlight housing which cover the optical surface 6 as completely as possible and thus prevent precipitation. Such air flows are indicated by arrows. An additional blower, not shown, which ensures the air exchange in the interior of the headlight housing 1 , generates an overpressure in the headlight housing 1 with the aid of the sen additionally preventing the ingress of moisture or dirt through openings in the headlight housing 1 other than the inlet opening 8 .

Obgleich bereits durch das Vorbeiströmen von Luft an der gefährdeten, relativ küh­ len optischen Oberfläche 6 die Niederschlagsbildung deutlich erschwert wird, kann dieser Effekt noch wesentlich dadurch gesteigert werden, dass die vorbeiströmende Luft vorgewärmt wird. Dazu ist eine Heizvorrichtung in Form eines Heizdrahtes 11 in der Luftzufuhröffnung 8 vorgesehen. Die durch die Zufuhröffnung strömende Luft streicht an dem Heizdraht 11 vorbei und erwärmt sich dabei. Dadurch steigt der Sät­ tigungsdampfdruck für Wasserdampf in der Luft im Scheinwerfer, d. h. Wasser kon­ densiert nicht mehr so schnell, und ausserdem wird die optische Oberfläche 6 der Abdeckscheibe 2 schneller auf eine höhere Temperatur gebracht, bei der eine Kon­ densation nicht mehr möglich ist.Although the formation of precipitation is already made significantly more difficult by the flow of air past the endangered, relatively cool optical surface 6 , this effect can be significantly increased by preheating the flowing air. For this purpose, a heating device in the form of a heating wire 11 is provided in the air supply opening 8 . The air flowing through the feed opening sweeps past the heating wire 11 and heats up in the process. As a result, the saturated vapor pressure for water vapor in the air in the headlight rises, ie water does not condense as quickly, and moreover the optical surface 6 of the cover plate 2 is brought to a higher temperature more quickly, at which condensation is no longer possible.

Insgesamt wird ausserdem durch die Zufuhr von Luft in den Scheinwerfer, die in der Luftzufuhröffnung erwärmt wurde (ohne dabei weiteren Wasserdampf aufnehmen zu können), und Absaugen der Luft aus dem Scheinwerfer die zunächst feuchte Luft schneller durch relativ trockenere Luft ersetzt.Overall, the addition of air to the headlights, which in the Air supply opening was heated (without taking up any more water vapor can), and sucking the air out of the headlights the initially moist air replaced more quickly by relatively drier air.

Claims (4)

1. Scheinwerfer mit einem Scheinwerfergehäuse und einer Abdeckscheibe, die die Lichtaustrittsöffnung des Scheinwerfergehäuses abdeckt, und mit einer Betau­ ungsschutzvorrichtung zur Verhinderung von Kondensation auf optischen Ober­ flächen in dem Scheinwerfergehäuse, dadurch gekennzeichnet, dass in de­ finiertem Abstand von der ersten Abdeckscheibe eine zweite Abdeckscheibe an­ geordnet ist und dass zumindest eine Luftein- und eine Luftaustrittsöffnung zum Ermöglichen einer Durchströmung des zwischen den beiden Abdeckscheiben gebildeten Raumes vorgesehen ist.1. Headlamp with a headlamp housing and a cover plate, which covers the light outlet opening of the headlamp housing, and with a condensation protection device for preventing condensation on optical surfaces in the headlamp housing, characterized in that a second cover plate is provided at a defined distance from the first cover plate is arranged and that at least one air inlet and one air outlet opening is provided to allow a flow through the space formed between the two cover plates. 2. Scheinwerfer nach Anspruch 1, dadurch gekennzeichnet, dass die Betau­ ungsschutzvorrichtung eine Heizvorrichtung zum Erzeugen vorgeheizter Luft in dem Scheinwerfergehäuse umfasst.2. Headlight according to claim 1, characterized in that the betau ungsschutzvorrichtung a heater for generating preheated air in the headlight housing includes. 3. Scheinwerfer nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Betauungsschutzvorrichtung wenigstens eine Luftzufuhröffnung und wenigstens eine Luftauslassöffnung in dem Scheinwerfergehäuse umfasst, die einen insbesondere auf die Lufteintrittsöffnung gerichteten Luftstrom erzeugen.3. Headlight according to one of claims 1 or 2, characterized in that the anti-condensation device has at least one air supply opening and comprises at least one air outlet opening in the headlight housing, the generate an air flow directed in particular towards the air inlet opening. 4. Scheinwerfer nach Anspruch 3, dadurch gekennzeichnet, dass ein Gebläse zur Erzeugung von Überdruck im Scheinwerfer vorgesehen ist.4. Headlight according to claim 3, characterized in that a blower is provided for generating excess pressure in the headlamp.
DE19962214A 1999-12-22 1999-12-22 Headlamp has condensation protection device with covering panels at defined distance apart with air inlet and outlet openings allowing passage of air through gap between panels Ceased DE19962214A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19962214A DE19962214A1 (en) 1999-12-22 1999-12-22 Headlamp has condensation protection device with covering panels at defined distance apart with air inlet and outlet openings allowing passage of air through gap between panels

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DE19962214A DE19962214A1 (en) 1999-12-22 1999-12-22 Headlamp has condensation protection device with covering panels at defined distance apart with air inlet and outlet openings allowing passage of air through gap between panels

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10135849A1 (en) * 2001-07-23 2003-02-06 Bayerische Motoren Werke Ag Motor vehicle headlamp has air flow fed to one edge of covering glass panel by air feed arrangement and air feed opening that exits via air outlet opening at edge opposite air feed opening
DE10139818A1 (en) * 2001-08-14 2003-02-27 Opel Adam Ag Headlamp for a motor vehicle has a casing with a glass covering, a source of light with an associated reflector and a ventilation structure with air inlets and outlets.
DE10213680A1 (en) * 2002-03-27 2003-10-09 Hella Kg Hueck & Co Vehicle headlamp with cooling, includes condenser in headlamp housing, with interceptor and drain for condensate formed
DE10227565A1 (en) * 2002-06-20 2004-01-08 Volkswagen Ag Headlamp or light for vehicle, has cooling surface arranged relative to ventilation opening so liquid condensed on cooling surface is automatically fed out of inner volume via ventilation opening
DE10340073A1 (en) * 2003-08-30 2005-04-07 Volkswagen Ag Motor vehicle head lamp esp. ventilated head lamp, has space between reflector and projector enclosed by metal wall
ES2230979A1 (en) * 2002-05-31 2005-05-01 Seat, S.A. Defogging system for optical equipment of motor vehicle, has housing injected with pressurized air by nozzle of gun, and ventilation unit that supplies pressurized air on wall through sealable hole
US7195365B2 (en) 2002-09-30 2007-03-27 Mitsubishi Pencil Co., Ltd. Vehicle lamp
US7262388B2 (en) 2005-04-28 2007-08-28 Illinois Tool Works Inc Vehicle light heater
DE102007004702A1 (en) * 2007-01-31 2008-08-07 Volkswagen Ag Vehicle light i.e. headlight, has condensation protection device, light emitting unit arranged in light housing, and electrical heating device arranged in gap formed on bottom side of light housing, where device heats air in gap
DE102007046262A1 (en) * 2007-08-17 2009-02-19 Volkswagen Ag Vehicle light has defrosting device with at least one deflector for deflecting airflow, at least one opening for guiding airflow, and at least one heat-generating light source with associated reflector and intermediate glass
WO2009024433A1 (en) * 2007-08-17 2009-02-26 Volkswagen Aktiengesellschaft Vehicle lights having a defogging device
DE102009055681A1 (en) * 2009-11-25 2011-05-26 Bayerische Motoren Werke Aktiengesellschaft Motor vehicle lamp i.e. motor vehicle headlamp, has light source provided in housing, and ventilator sucking air from housing via exhaust air opening, where ventilator and exhaust air opening are arranged above light source
WO2014116160A1 (en) * 2013-01-24 2014-07-31 Scania Cv Ab Device for dehumidify
WO2015200082A1 (en) * 2014-06-23 2015-12-30 Valeo North America, Inc. Headlamp and/or tail light assembly comprising a heater
DE102015002246A1 (en) 2015-02-21 2016-08-25 Audi Ag Lighting device for a motor vehicle, motor vehicle and method for operating a lighting device
EP3327335A1 (en) * 2016-11-28 2018-05-30 Automotive Lighting Reutlingen GmbH Headlamp and method for operating same
DE102021127380A1 (en) 2021-10-21 2023-04-27 Bayerische Motoren Werke Aktiengesellschaft Vehicle light, vehicle and method for reducing humidity
DE102022127720A1 (en) 2022-10-20 2024-04-25 Bayerische Motoren Werke Aktiengesellschaft Motor vehicle lamp and motor vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2701756A1 (en) * 1993-02-17 1994-08-26 Peugeot Ventilated optical unit especially for a motor vehicle
DE4339954A1 (en) * 1993-11-24 1995-06-01 Porsche Ag Car headlamp
EP0859188A2 (en) * 1997-02-12 1998-08-19 Volkswagen Aktiengesellschaft Condensation formation preventing device for headlamp
DE19733000A1 (en) * 1997-02-12 1998-08-20 Volkswagen Ag Headlight condensation protection

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2701756A1 (en) * 1993-02-17 1994-08-26 Peugeot Ventilated optical unit especially for a motor vehicle
DE4339954A1 (en) * 1993-11-24 1995-06-01 Porsche Ag Car headlamp
EP0859188A2 (en) * 1997-02-12 1998-08-19 Volkswagen Aktiengesellschaft Condensation formation preventing device for headlamp
DE19733000A1 (en) * 1997-02-12 1998-08-20 Volkswagen Ag Headlight condensation protection

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10135849A1 (en) * 2001-07-23 2003-02-06 Bayerische Motoren Werke Ag Motor vehicle headlamp has air flow fed to one edge of covering glass panel by air feed arrangement and air feed opening that exits via air outlet opening at edge opposite air feed opening
DE10139818A1 (en) * 2001-08-14 2003-02-27 Opel Adam Ag Headlamp for a motor vehicle has a casing with a glass covering, a source of light with an associated reflector and a ventilation structure with air inlets and outlets.
DE10213680A1 (en) * 2002-03-27 2003-10-09 Hella Kg Hueck & Co Vehicle headlamp with cooling, includes condenser in headlamp housing, with interceptor and drain for condensate formed
ES2230979A1 (en) * 2002-05-31 2005-05-01 Seat, S.A. Defogging system for optical equipment of motor vehicle, has housing injected with pressurized air by nozzle of gun, and ventilation unit that supplies pressurized air on wall through sealable hole
DE10227565A1 (en) * 2002-06-20 2004-01-08 Volkswagen Ag Headlamp or light for vehicle, has cooling surface arranged relative to ventilation opening so liquid condensed on cooling surface is automatically fed out of inner volume via ventilation opening
US7195365B2 (en) 2002-09-30 2007-03-27 Mitsubishi Pencil Co., Ltd. Vehicle lamp
DE10345058B4 (en) * 2002-09-30 2008-06-26 Mitsubishi Pencil Co., Ltd. vehicle headlights
DE10340073A1 (en) * 2003-08-30 2005-04-07 Volkswagen Ag Motor vehicle head lamp esp. ventilated head lamp, has space between reflector and projector enclosed by metal wall
US7262388B2 (en) 2005-04-28 2007-08-28 Illinois Tool Works Inc Vehicle light heater
DE102007004702A1 (en) * 2007-01-31 2008-08-07 Volkswagen Ag Vehicle light i.e. headlight, has condensation protection device, light emitting unit arranged in light housing, and electrical heating device arranged in gap formed on bottom side of light housing, where device heats air in gap
DE102007046262A1 (en) * 2007-08-17 2009-02-19 Volkswagen Ag Vehicle light has defrosting device with at least one deflector for deflecting airflow, at least one opening for guiding airflow, and at least one heat-generating light source with associated reflector and intermediate glass
WO2009024433A1 (en) * 2007-08-17 2009-02-26 Volkswagen Aktiengesellschaft Vehicle lights having a defogging device
DE102009055681A1 (en) * 2009-11-25 2011-05-26 Bayerische Motoren Werke Aktiengesellschaft Motor vehicle lamp i.e. motor vehicle headlamp, has light source provided in housing, and ventilator sucking air from housing via exhaust air opening, where ventilator and exhaust air opening are arranged above light source
WO2014116160A1 (en) * 2013-01-24 2014-07-31 Scania Cv Ab Device for dehumidify
WO2015200082A1 (en) * 2014-06-23 2015-12-30 Valeo North America, Inc. Headlamp and/or tail light assembly comprising a heater
DE102015002246A1 (en) 2015-02-21 2016-08-25 Audi Ag Lighting device for a motor vehicle, motor vehicle and method for operating a lighting device
EP3327335A1 (en) * 2016-11-28 2018-05-30 Automotive Lighting Reutlingen GmbH Headlamp and method for operating same
US20180149334A1 (en) * 2016-11-28 2018-05-31 Automotive Lighting Reutlingen Gmbh Headlight and method for operating the headlight
DE102021127380A1 (en) 2021-10-21 2023-04-27 Bayerische Motoren Werke Aktiengesellschaft Vehicle light, vehicle and method for reducing humidity
DE102022127720A1 (en) 2022-10-20 2024-04-25 Bayerische Motoren Werke Aktiengesellschaft Motor vehicle lamp and motor vehicle

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