EP2672170A2 - Dispositif d'éclairage d'un véhicule automobile - Google Patents

Dispositif d'éclairage d'un véhicule automobile Download PDF

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Publication number
EP2672170A2
EP2672170A2 EP20130167299 EP13167299A EP2672170A2 EP 2672170 A2 EP2672170 A2 EP 2672170A2 EP 20130167299 EP20130167299 EP 20130167299 EP 13167299 A EP13167299 A EP 13167299A EP 2672170 A2 EP2672170 A2 EP 2672170A2
Authority
EP
European Patent Office
Prior art keywords
light
lighting device
infrared
components
illumination device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20130167299
Other languages
German (de)
English (en)
Other versions
EP2672170B1 (fr
EP2672170A3 (fr
Inventor
Stefan Hertneck
Jan Schmid
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.)
Marelli Automotive Lighting Reutlingen Germany GmbH
Original Assignee
Automotive Lighting Reutlingen GmbH
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 Automotive Lighting Reutlingen GmbH filed Critical Automotive Lighting Reutlingen GmbH
Publication of EP2672170A2 publication Critical patent/EP2672170A2/fr
Publication of EP2672170A3 publication Critical patent/EP2672170A3/fr
Application granted granted Critical
Publication of EP2672170B1 publication Critical patent/EP2672170B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/10—Protection of lighting devices
    • 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
    • F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses

Definitions

  • the present invention relates to a lighting device of a motor vehicle, wherein the lighting device has light-focusing means, and dark-colored plastic components are arranged in the lighting device.
  • Various lighting devices for motor vehicles are known from the prior art. These can be designed as headlights or as lights. Headlamps are arranged in the front region of a vehicle and serve in addition to the traffic safety by visualizing the vehicle for other road users in particular the illumination of the area in front of the vehicle, for example in the form of a low beam, long distance or fog light distribution and in the form of certain environmental conditions. and / or driving situations adaptable light distributions, such as static or dynamic cornering light, bad weather light, city lights, Highway light, motorway light.
  • the lighting devices comprise at least one light source, for example in the form of an incandescent lamp, gas discharge lamp or semiconductor light source, for generating light. Furthermore, they comprise at least one primary optics for bundling the generated light.
  • the primary optics can be designed as a reflector (concave mirror), which reflects the light by means of conventional reflection.
  • the reflector may have the shape of an ellipsoid, a paraboloid or any other arithmetically calculated free form.
  • the primary optics can also be formed as a translucent body made of glass or plastic, wherein the bundling of the light then takes place by refraction when entering the body and / or exit from the body and / or by total reflection at outer boundary surfaces of the body.
  • the lighting devices operate e.g. according to a reflection principle, whereby light emitted by the light source is reflected onto the road ahead of the vehicle to produce a desired light distribution by a primary optic designed as a reflector.
  • the lighting devices can also work according to a projection principle, wherein light emitted by the light source is focused after bundling by the primary optics, to produce a desired light distribution by projection optics on the road ahead of the vehicle.
  • the projection optics can be designed as a converging lens or as a reflector, preferably with a paraboloid shape.
  • Lighting devices comprise a housing, which is preferably made of plastic.
  • the housing has a through a translucent cover Glass or plastic sealed light exit opening, through which the light can leave the lighting device.
  • the cover may have at least partially optically active elements (eg prisms, cylindrical lenses, etc.) (so-called. Lens). But it can also be formed without such optically active elements (so-called. Clear disc).
  • the actual light-emitting unit of a lighting device is combined to form a light module.
  • a light module is arranged either alone or together with other light modules in the housing of a lighting device.
  • a desired light distribution can be generated by a single light module or else by a plurality of light modules and by superposition of the partial light distributions emitted by them.
  • a cover frame surrounds the outer circumference of a projection optical system of a projection module or of a reflector of a reflection module.
  • the cover frames may extend on the inside of the housing along the top, back, bottom and / or side sides.
  • the converging lens and at least partially also a lens holder, over which the Conjoint lens is attached to the remaining light module is surrounded by a hollow cylindrical tube made of plastic.
  • other components may be arranged in plastic inside the housing.
  • Cover frame, tubes or other plastic components in the housing may, for example, be mirrored. It is also known to color these cover frames, tubes or other components dark, preferably black, for example, in order to avoid unwanted and uncontrollable reflection of light on them.
  • the dark colored cover frames, tubes or other plastic components have a matt or glossy surface.
  • a carbon black-containing paint is preferably used for coloring the components.
  • the object of the invention is to prevent aesthetic and functional impairments of the known lighting devices due to solar radiation in cooperation with light-focusing means of the lighting devices.
  • the appearance of the lighting devices should not be changed if possible, in particular no additional components should be necessary for this.
  • the dark colored components of the illumination device are at least partially made of an infrared-transparent material.
  • infrared transmission is understood as meaning a transmission of IR radiation of greater than 50%, in particular greater than 70%, preferably in the range of approximately 90%.
  • Infrared radiation is defined as an electromagnetic radiation that is adjacent to the visible light with increasing wavelengths, that is, begins at a wavelength of approximately 780 nm.
  • the infrared transmissive material is in the near infrared (NIR) range. permeable, ie in a wavelength range from about 780 nm up to a wavelength range of about 3000 nm.
  • the near infrared range is the wavelength range which leads to a particularly high heating of the components when these beams are absorbed by the components. But even beyond the NIR range, the radiation can lead to their heating when absorbed by the components.
  • a light-focusing means is primarily a converging lens of a projection module of the lighting device into consideration.
  • a curved or curved cover in particular if it comprises optically active elements, light can focus.
  • mirrored components for example cover frames, tubes, diaphragm elements, etc.
  • mirrored components are such that they focus incident light beams on dark-colored components of the illumination device.
  • an infrared fraction of solar rays incident from the outside into the illumination device can pass through the dark-colored components when the solar rays strike the dark-colored components after bundling them with the light-focusing means ,
  • these components are made according to the invention of an IR-transparent material.
  • an IR-transparent material no or only a very small absorption of the infrared radiation by the dark colored component and thus only a slight warming of these components by incident and focused light rays instead.
  • the affected components continue to be darkened, so that the external appearance of the illumination device remains unchanged compared to conventional illumination devices without IR-permeable components.
  • the infrared radiation thus passes the infrared transmissive material of the affected component almost without effect, even if the focus of the light-focusing agent is in the range of the affected component.
  • the infrared radiation inevitably strikes any other surfaces in the illumination device or in the motor vehicle, the infrared radiation being already fanned to such an extent that the other surfaces are not heated in a destructive manner because of the greater distance to the focal point of the light-focusing means , If these other surfaces are made of metal or other low heat sensitive material, the IR radiation will not harm them.
  • the other surfaces are usually not in the field of vision of an observer who sees through the cover into the interior of the lighting device, so that - even if these other surfaces Plastic are made - a surface change or a slight damage to these surfaces does not lead to an impairment of the overall aesthetic impression that the lighting device has on a viewer leads.
  • the infrared radiation is passed after passing through the infrared transmissive material in a region of the illumination device, where, for example, for the operation of the illumination device cooling elements or cooling devices are already provided and thus there by the infrared Radiation generated heat can be dissipated.
  • the infrared radiation can, for example, also be directed into the outer area of the illumination device, where the cooling can be effected by normal air circulation.
  • the heat generated by the infrared rays can cause no damage in the lighting device.
  • the infrared radiation of the sun which is focused by the light-focusing means, can strike, for example, at least part of the cover frame, a tube and / or a trim strip.
  • the corresponding components may be at least partially colored dark, for example, to avoid disturbing reflections, which are caused by from the light module of the lighting device exiting light and / or light of other road users and / or any other extraneous light.
  • the dark colored components comprise a thermoplastic, preferably a polycarbonate, with color pigments and that the color pigments cause the infrared transmission.
  • the IR permeability may be due to the chemical structure of the Be given pigments.
  • a corresponding plastic, which is particularly suitable for the dark colored components of the illumination device according to the invention, is known, for example, from Bayer under the name "'Makrolon®". "Makrolon" according to the manufacturer in an infrared wavelength range up to about 1700 nm to an approximately 90% radiation permeability.
  • the dark-colored and infrared-transparent components of the illumination device are preferably black or at least approximately black in color.
  • the plastic components are therefore not simply coated with a particular color, but colored through.
  • the affected components color practically can not differ from the conventional dark components that are used in known from the prior art lighting devices.
  • the lighting device looks like the exterior of the conventional lighting equipment.
  • the light source comprises at least one semiconductor light source, in particular a light-emitting diode.
  • the lighting device according to the invention prevents effectively impairments to such, equipped with semiconductor light sources, lighting devices.
  • the invention is particularly advantageous in lighting devices with a projection module, since the projection optics (for example, the converging lens) captures a particularly large amount of sunlight and focuses on dark-colored components of the illumination device. By the invention damage or destruction of the components is effectively prevented even in such a case.
  • the headlight 5 comprises a housing 17, which is preferably made of plastic. Inside the housing 17, a light module is arranged, which is designated in its entirety by the reference numeral 7.
  • the lighting device 5 could also comprise a plurality of light modules, in addition to headlight functions, such as dipped beam, high beam or fog light, and lighting functions such Flashing light, daytime running lights, position light, etc. may be integrated in the lighting device 5.
  • the light module 7 has a reflector 10 designed as primary optics.
  • the reflector 10 preferably has an ellipsoidal shape or a free shape similar to an ellipsoidal shape.
  • a light source 12 is arranged in one of its possible focal points.
  • the reflector 10 focuses the light emitted by the light source 12.
  • the light source 12 may also be formed as at least one semiconductor light source (eg, at least one LED, LED) or as a gas discharge lamp.
  • the reflector 10 may be made of plastic or metal. It is arranged in a holder 14 and can be mounted horizontally and / or vertically adjustable in the housing 17 for generating an adaptive light distribution. In the illustrated example, however, the holder 14 is fixedly connected to the housing 17 of the illumination device 5.
  • a projection optics in the form of a collection or projection lens 18 is arranged in the beam path of the light reflected by the reflector 10.
  • the light module 7 is therefore designed as a so-called projection module, the projection lens 18 projecting at least a portion of the light focused by the reflector 10 to generate a desired light distribution on the road ahead of the vehicle.
  • the projection lens 18 is attached via a holding frame 20, which is preferably made of metal, to a front edge of the reflector 10 and thus to the remaining light module 7.
  • the housing 7 has in the light exit direction 16 a Light exit opening 19, which is closed with a translucent cover 15.
  • the cover 15 is made of glass or plastic and may be formed with or without optically active elements, in particular scattering elements.
  • At least one cover frame 22 is arranged around the outer circumference of the projection module 7, in particular along the outer circumference of the condenser lens 18, so that a gap or gap between the light module 7 and the housing interior is covered and when viewed from the outside through the cover 15 into the interior of the Housing 17 is not visible.
  • the cover frame 22 determined by its design (shape, color, surface finish, etc.) the aesthetic impression and thus the design of the lighting device 5 quite considerably, especially when the light source 12. It is preferably made of plastic and can be colored dark or black be. The dark color can, for example, prevent unwanted and disturbing light reflections. In the interior of the housing 17 of the lighting device 5 also other dark colored components made of plastic may be present, however, in FIG. 1 are not explicitly drawn. It could be, for example, a tube surrounding the lens holder 20 made of dark colored plastic, a decorative strip of dark colored plastic or the like.
  • a diaphragm arrangement 24 may be provided which serves to produce a dimmed light distribution, for example a dipped beam or a fog light.
  • a dimmed light distribution for example a dipped beam or a fog light.
  • the diaphragm 24 shadows reflected light from the reflector 10, which would otherwise reach a region above the light-dark boundary in the light distribution.
  • the diaphragm assembly 24 can be moved in and out of the beam path of the light. In this way, the light distribution between dipped and main beam can be switched.
  • sunrays which have inter alia energy-rich infrared radiation can fall through the cover 15 into the interior of the housing 17 at different angles.
  • the solar rays can be focused on light focusing means, e.g. in the form of the converging lens 18, meet.
  • the cover 15 for example.
  • the reflector 10 can also act to focus on incident solar radiation.
  • Infrared radiation is defined as an electromagnetic radiation that is adjacent to the visible light with increasing wavelengths, ie starts at a wavelength of about 780 nm and goes to about 14000 nm. By absorbing IR radiation through a body, it heats up. The sun's rays are reflected in the light focusing means 10; 15; 18 bundled and can then on the in the Lighting arrangement 5 arranged components 22 made of dark colored plastic meet. When the sun is standing so that the sun's rays through the light focusing means 10; 15; 18 are focused on the dark colored plastic parts 22, meets a relatively large amount of energy in a spatially limited area on the plastic parts 22. So that energy in the plastic part 22 is not converted into heat and as a result to a change in the surface, damage or even destruction of the plastic part 22 leads, the present invention proposes to manufacture the dark colored plastic part 22 of an infrared transparent material
  • FIG. 2 shows radiation-permeable properties of plastics suitable for the invention in a diagram.
  • the plastics mentioned are exemplary.
  • the diagrams show a radiation permeability D on the y-axis and a corresponding wavelength W on the x-axis.
  • the x-axis is divided into three regions, namely a region of visible light 30, infrared region 32 and an ultraviolet region 34. Each diagram shows values for different material thicknesses.
  • the displayed values of the FIG. 2 refer to a plastic offered by Bayer MaterialScience AG under the name "Black Makrolon".
  • Black Makrolon the plastic in the production of a color mixed with special pigments that at least in a portion of the infrared wavelength range, a transmission of material greater than 50%, in particular greater than 70%, particularly preferably about 90% effect.
  • the transmission curves are shown for two different material thicknesses of 1 mm (line 42) and 4 mm (line 44). How out FIG. 2 As can be seen, the material is almost impermeable to radiation having a wavelength in the range 34 of the UV light and in the range 30 of the visible light.
  • the transmission D For radiation from a wavelength of about 750 nm, at least for radiation from a wavelength of about 780 nm, the transmission D increases abruptly and reaches about 90%.
  • the radiation transmissivity D remains in the infrared wavelength range 32 to about 1,600 nm well above 50%, especially about about 70%, most preferably in the range of about 90%.
  • the transmission properties D in this range are only slightly dependent on the material thickness. Then, the transmittance D falls short for radiation between 1,600 nm and 1,700 nm wavelength, after which it increases again immediately to a wavelength of about 2100 nm to almost 50%, in particular over about 70%, most preferably in the range of about 90%.
  • the transmission properties D are much more dependent on the material thickness than in the range between 750 nm and 1,600 nm. It is important, however, that the transmission properties D are good, especially for thinner material (line 42), since the components of the illumination device 5 to which the solar radiation strikes, as a rule, has a relatively low thickness of only a few millimeters. At least for thinner material thicknesses, it is also possible to speak of an IR permeability of the material used in the range from approximately 1700 nm to 2100 nm, since values of greater than 50%, in particular greater than approximately 70%, most preferably approximately 80%, be achieved.
  • the wavelength range between 780 nm and 1,600 nm belongs to the near infrared (NIR) region, which ranges from approximately 780 nm to approximately 2,500 nm.
  • NIR radiation in this wavelength range particularly contributes to the heating of materials or bodies to which the radiation falls.
  • a particularly good IR transmittance, in particular in this wavelength range, thus ensures in a particularly efficient manner that incident sunrays, after being focused by the focusing elements 10, 15, 18, do not damage the dark colored components 22, if they strike or hit them be focused on this.
  • RAL 9004 RAL 9005, RAL 9011, RAL 9017, RAL 9021, RAL 8022, RAL 7026, RAL 7024, RAL 7022, RAL 7021, RAL 7016, RAL 6022 , RAL 6020, RAL 6015, RAL 6012, RAL 6009, RAL 6008, RAL 6007, RAL 5011, RAL 5004 and RAL 3007.
  • the infrared radiation of the sun can thus pass through the infrared transparent material of the affected dark colored component 22 almost without effect, even if sun rays are focused on or in the affected component. At most, there is a slight heating of the component 22, damage to the component 22 by the absorbed IR radiation is practically excluded. After the transmission through the component 22, a large part of the infrared radiation strikes any other surface in or around the projection module 7, wherein due to an increasing distance to the focal point of the focusing means, for example.
  • the converging lens 18, the infrared radiation meanwhile fanned out and thus less concentrated, so that the further surface is not heated in a destructive way.
  • the infrared radiation radiates into the projection module 7 or into the illumination device 5, the broader the infrared radiation is fanned out and the less is a surface in which the infrared radiation impinges and is absorbed selectively heated.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP13167299.0A 2012-06-08 2013-05-10 Dispositif d'éclairage d'un véhicule automobile Active EP2672170B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202012005548U DE202012005548U1 (de) 2012-06-08 2012-06-08 Beleuchtungseinrichtung eines Kraftfahrzeugs

Publications (3)

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EP2672170A2 true EP2672170A2 (fr) 2013-12-11
EP2672170A3 EP2672170A3 (fr) 2014-12-03
EP2672170B1 EP2672170B1 (fr) 2022-02-09

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DE (1) DE202012005548U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016194758A1 (fr) * 2015-05-29 2016-12-08 東洋紡株式会社 Composition de résine de polyester transmettant la lumière
WO2016194757A1 (fr) * 2015-05-29 2016-12-08 東洋紡株式会社 Composition de résine de polyester transmettant la lumière infrarouge
US20170241612A1 (en) * 2016-02-18 2017-08-24 Valeo Vision Lighting assembly for lighting and/or signaling in a motor vehicle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014095954A1 (fr) * 2012-12-20 2014-06-26 Bayer Materialscience Ag Masses de moulage de polycarbonate colorées de manière douce, contenant des pigments réfléchissant les ir
DE102013211880B4 (de) 2013-06-24 2022-04-14 Automotive Lighting Reutlingen Gmbh Kraftfahrzeugbeleuchtungseinrichtung
US10267482B2 (en) * 2017-05-05 2019-04-23 Ford Global Technologies, Llc Vehicular lighting assemblies and headlamps with condenser lenses configured to prevent solar damage

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WO2003099923A1 (fr) 2002-05-20 2003-12-04 General Electric Company Melanges de polystyrene syndiotactique

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FR2759765B1 (fr) * 1997-02-18 1999-06-04 Valeo Vision Projecteur du type elliptique, notamment pour vehicule automobile
DE29912504U1 (de) * 1999-07-16 1999-09-16 Hella Kg Hueck & Co, 59557 Lippstadt Scheinwerfer für Fahrzeuge
SI21240A (sl) * 2002-05-27 2003-12-31 Saturnus - Avtooprema Proizvodnja Svetlobne Opreme Svetilo z na videz črnim ali skoraj črnim okrovom, ki je izdelan iz polimera
WO2009040720A2 (fr) * 2007-09-27 2009-04-02 Philips Intellectual Property & Standards Gmbh Ensemble d'éclairage équipé d'une lampe réfléchissante et d'un couvercle antireflet

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WO2003099923A1 (fr) 2002-05-20 2003-12-04 General Electric Company Melanges de polystyrene syndiotactique

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016194758A1 (fr) * 2015-05-29 2016-12-08 東洋紡株式会社 Composition de résine de polyester transmettant la lumière
WO2016194757A1 (fr) * 2015-05-29 2016-12-08 東洋紡株式会社 Composition de résine de polyester transmettant la lumière infrarouge
CN107614610A (zh) * 2015-05-29 2018-01-19 东洋纺株式会社 红外线透过性聚酯树脂组合物
JPWO2016194758A1 (ja) * 2015-05-29 2018-03-15 東洋紡株式会社 赤外光透過性ポリエステル樹脂組成物
US10550262B2 (en) 2015-05-29 2020-02-04 Toyobo Co., Ltd. Infrared-light-transmitting polyester resin composition
CN107614610B (zh) * 2015-05-29 2020-12-29 东洋纺株式会社 红外线透过性聚酯树脂组合物
US20170241612A1 (en) * 2016-02-18 2017-08-24 Valeo Vision Lighting assembly for lighting and/or signaling in a motor vehicle
CN107091444A (zh) * 2016-02-18 2017-08-25 法雷奥照明公司 用于在机动车辆中照明和/或信号指示的照明组件
US10267480B2 (en) * 2016-02-18 2019-04-23 Valeo Vision Lighting assembly for lighting and/or signaling in a motor vehicle
CN107091444B (zh) * 2016-02-18 2021-08-10 法雷奥照明公司 用于在机动车辆中照明和/或信号指示的照明组件

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Publication number Publication date
DE202012005548U1 (de) 2012-07-02
EP2672170B1 (fr) 2022-02-09
EP2672170A3 (fr) 2014-12-03

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