EP1201985A2 - Système d' éclairage, notamment pour véhicule automobile, et méthode pour produire un faisceau de lumière de forme désirée - Google Patents

Système d' éclairage, notamment pour véhicule automobile, et méthode pour produire un faisceau de lumière de forme désirée Download PDF

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Publication number
EP1201985A2
EP1201985A2 EP01125232A EP01125232A EP1201985A2 EP 1201985 A2 EP1201985 A2 EP 1201985A2 EP 01125232 A EP01125232 A EP 01125232A EP 01125232 A EP01125232 A EP 01125232A EP 1201985 A2 EP1201985 A2 EP 1201985A2
Authority
EP
European Patent Office
Prior art keywords
light
collector
separator
lighting system
light source
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Withdrawn
Application number
EP01125232A
Other languages
German (de)
English (en)
Inventor
Helmut Tiesler-Wittig
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Corporate Intellectual Property GmbH
Koninklijke Philips Electronics NV
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 Philips Corporate Intellectual Property GmbH, Koninklijke Philips Electronics NV filed Critical Philips Corporate Intellectual Property GmbH
Publication of EP1201985A2 publication Critical patent/EP1201985A2/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • F21S41/17—Discharge 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/27—Thick lenses
    • 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
    • F21S41/17—Discharge light sources
    • F21S41/172—High-intensity discharge 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • 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
    • F21S41/28—Cover glass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • 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
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • F21V9/45—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity by adjustment of photoluminescent elements

Definitions

  • the invention relates to a lighting system, in particular for motor vehicles, and a Process for producing a light beam of the desired shape.
  • Lighting systems and corresponding methods for generating light beams are known for a long time and in the most diverse form. All corresponding lighting systems Common to the method and method is that a light source is used to generate light which then is bundled by different optical means so that the light bundle the desired shape.
  • a light source is used to generate light which then is bundled by different optical means so that the light bundle the desired shape.
  • B. so-called MPX lamps microwave power xenon lights
  • the discharge lamps point big compared to incandescent lamps in terms of their life and performance Advantages, however, the arc generated by them has in contrast to one Incandescent lamp filament no exact limitation and is therefore optically and lighting technology more difficult to handle.
  • parabolic reflectors that point the light source directly to the project the illuminating surface onto the road in motor vehicles.
  • the final bundle build-up by a diffuser usually a combination of Prism and cylindrical lens arrays, which the lighting system closes to the front reached.
  • projection systems are known in which an elliptical Reflect the light source a few centimeters away from the lamp maps. Near this level there is a sheet of automotive headlights as mechanical aperture, which is specially shaped to a required for the low beam Generate light-dark edge. A projection lens forms this aperture and the light source image on the road. This principle of bundle creation can be very Contrasting light-dark edges produce, however, a clear color fringe exhibit.
  • An improvement in the bundle properties is achieved through the use of so-called complex shape or open space reflectors.
  • the geometry of the reflector is in small segments calculated individually due to their effect on the headlight bundle. This creates a reflector geometry that of classic rotating surfaces (elliptical or parabolic) deviates.
  • complex-shape reflectors it is with headlights possible with halogen light bulbs, without a dimming cap a sufficiently high one To achieve contrast at the light-dark edge. Thanks to the improved reflector geometry can dispense with a lens for influencing the beam when using such reflectors become. In this case, a clear cover plate is sufficient.
  • the object of the invention is an illumination system in particular for motor vehicles and a method for producing a light beam Specify the desired shape, in which the exact positioning of the light source relative to the other optical components only a little influence on the Light output and the efficiency of the overall system or on the generation of the desired light beam.
  • the at least one light source preferably in the form of a high-power discharge lamp (HID - high-intensity discharge lamp) in particular a low-voltage xenon lamp (MPXL - Micro-Power-Xenon-Light), the light source at least partially surrounding collector for collecting and forwarding the generated by the light source
  • the light source at least partially surrounding collector for collecting and forwarding the generated by the light source
  • Light to at least one separator and at least one separator made of light-conducting Material comprises, wherein each separator via at least one specially shaped light exit surface for emitting the light directed into the separator as a light beam defined form.
  • the configuration according to the invention has a number of advantages. It will be like this possible, e.g. clearly limited required in the automotive field with low beam Light-dark edge due to appropriate design of the collector without absorption generate and then this edge by means of one or preferably several separators map. So far, however, the edge has been created by diaphragms, which are part of the hide generated light and thus the efficiency of corresponding lighting systems reduce unnecessarily. In a lighting system according to the invention in contrast, practically all of the light generated by the light source or sources for illumination be used, so that there is a very high efficiency.
  • Another great advantage of the configuration according to the invention is that it is very compact lighting systems can be realized, their overall length compared to conventional Systems is greatly reduced.
  • the light source, collector and Separator (s) arranged in such a way that a so-called “intertwined beam path" results.
  • the separator (s) and collector are arranged relative to one another in such a way that that part of the image of the light source generated by the collector in the area of the entrance pupil each separator lies.
  • Illumination beam path the image of the light source
  • imaging beam path the image of the object to be imaged, here the collector
  • the collector optics in its exit surface there are sharp edges that are considered an object.
  • the size of the light source has practically no influence in this embodiment on the aperture in the headlight bundle, but only on the diameter of the Separators.
  • the headlights that have been on the market so far for motor vehicles the light source is mapped directly onto the road, i.e. each Segment of the reflector creates a sharp image of the filament or the arc the roadway.
  • the beam is not cropped, and the efficiency of the Lighting system is very high.
  • the filament By decoupling the shape of the emitted light beam from its size and orientation the filament can be the aperture of the light rays emanating from the light source can be kept small without the usual lighting problems As a rule, a small aperture is desired, since the aperture size of the Is directly dependent on the collector if the collector is to work with very high efficiency.
  • the intertwined beam path also increases the efficiency when using conventional discharge lamps, since the light that is in the so-called salt puddle is scattered, which occurs during the operation of such discharge lamps forms. Due to the intertwined beam path, the bow no longer has to be sharp in the Headlight bundles are imaged, so that a stronger scatter of light only has little influence on the bundle.
  • a discharge lamp with a lamp bulb is to be used as the light source discharge lamps with a cylindrical or sagging bulb shape in particular proven.
  • the collector is preferably designed as a solid component and consists of a transparent heat-resistant material, preferably made of glass.
  • the collector can also consist of a light-conducting plastic, which can have weight advantages over glass.
  • a few plastics as collector material seem suitable.
  • the collector preferably has an annular light exit surface, so that is advantageous with one and the same "standardized" collector shape by using different ones Separators many uses can be covered.
  • the desired light beam it may be sufficient Collector just to arrange a separator.
  • the light from the collector on several, preferably six to ten separators to distribute and then the light beams emitted by the separators to form the Overlap the desired shape.
  • the light exit surfaces of the separators can have a structure like a diffuser exhibit. This has the advantage of being on a separate spreading disc and thus one further material-air-material transition of light, always with light loss is connected, can be dispensed with.
  • FIG. 1 shows a lighting system, designated as a whole by 10 shown, the essential parts of a light source in the form of a discharge lamp 12 Collector 14 and a number of separators 16, which form a total separator, in a common housing 18 with a translucent front surface 20 is arranged are.
  • the parts are in the housing 18 as well as one for operating the discharge lamp 12 necessary ballast 22 by means of corresponding, known per se Holding means 24 held in a suitable, possibly adjustable manner.
  • the collector 14 and the separators 16 are each solid components, so that the light is deflected and forming a light beam in contrast to the usual systems within transparent materials and the light from the light source to Leaving the lighting system largely not in air, but in a solid Medium moves.
  • the collector 14 is shown in two views. Clearly visible is an essential feature of the invention that the great efficiency of an invention
  • the lighting system contributes: the collector "encloses" the discharge lamp 12, more precisely the area in which the electrodes of the discharge lamp are arranged and in which the arc is formed when the lamp is in operation.
  • the collector captures almost all of the generated light.
  • a light entry surface 24 of the Collector designed such that it surrounds the discharge lamp 12 and its axial Limitation outside that occupied by the bulb of the discharge lamp 12 Range.
  • the discharge lamp 12 is relative to the collector 14 arranged so that the electrodes of the lamp lie on a straight line that is essentially runs parallel to the direction of radiation of the desired light beam.
  • the collector 14 has a radial aperture between about 15 ° and 25 ° and has a conical light entry surface facing the light source 24 and an annular light exit surface 26.
  • a rotationally symmetrical construction the collector 14 advantageously allows different with the same collector Light beams, e.g. - when used in a motor vehicle headlight - a Generate bundles for right-hand traffic and for left-hand traffic. This enables one Particularly inexpensive manufacture of various headlight models based on the same collector. Only the separators then have to be replaced.
  • the outside 28 of the collector 14 may be at least partially mirrored so as to ensure that the lamp 12 over the Light entry surface into the collector 14 light practically completely to the light exit surface 26 is deflected.
  • the mirrored outside 28 of the collector 14 has the shape of an ellipsoid of revolution.
  • the collector can also be shaped so that the desired reflection also results on the outside by total reflection, but this allows at least partial Mirroring the outside a particularly compact design of the collector and thus a short overall length of the overall system.
  • the light exit surface 26 of the collector is shaped in such a way that when it is used as intended Operation of the lighting system emerging from the light exit surface 26 light bundle Have edges with sharp light-dark transitions. These are then created using of the separators, so that a light bundle of the desired is located in the overlay Form.
  • the inside 30 of the collector is shaped in such a way that it is in the correct assembly state of the collector can lead to total reflection relative to the light source.
  • the Beam path is shown in Figures 4 and 5.
  • FIGS. 4 and 5 the path of exemplary rays a, b, c, d and e is as intended Operation of the lighting system shown. It happens at the points 32 and 34 for total reflection, namely once at an interface of the collector 14 and once at an interface of the separator 16.
  • the separators 16 use the aperture distribution of the Collector 14 ideal.
  • the curvature of the light entry surface 36 and the light exit surface 38 of the separators 16 are each in the meridional section.
  • the collector has in this Towards an aperture of approximately 15 °.
  • the aperture is only perpendicular to this Degree, so that no imaging effect of the separators is necessary in this direction. In this way it becomes possible to add total reflection to the longitudinal surfaces of the separators use without disturbing the image of the high-contrast edges.
  • the high-performance light sources that are generally used are not just light in the visible range, but also in the UV range, for radiation protection reasons, but especially to increase the life of the separators advantageously made of a plastic such as Polymethyl methacrylate are produced and in As a rule, age by UV light, be appropriate, UV-absorbing in the beam path To take action.
  • Such measures can be applied to a wide variety of different applications optimally adapted ways are taken.
  • Light source 12, light entry and / or light exit surface of the collector and / or the light entry surface of the Separators can be provided with a UV-absorbing layer. Because coatings the light source due to the high temperatures that occur during operation Tend to flake off, as a rule, coatings on the light exit surface of the collector or to give preference to the light entry surface of the separators.
  • the separators 16 have a curved light entry surface 36 and a curved one Light exit surface 38.
  • Each separator 16 is a solid component, advantageously made of plastic with good light-conducting properties, such as. B. Polymethyl methacrylate. Compared to glass, plastics have low temperature resistance on, however, the arrangement according to the invention has the great advantage of light source and thermally decouple separators so that the separators are only more moderate Are exposed to heat.
  • the lighting system operates with reference to FIGS. 4 and 5 as follows: Light is generated by means of the light source 12. The light is turned on by the collector 14 collected and forming an intertwined beam path on the separators 16 directed.
  • the collector not only fulfills the task of redirecting light, it also reduces and creates the aperture of the light emitted by the light source 12 a certain light distribution in its exit surface. At the edges of the light exit surface arise without absorption light bundles with the usually, for example Generation of low beam in the motor vehicle, desired sharp light-dark transitions.
  • the light bundles are then introduced into the separators 16 and by total reflection directed to the respective specially shaped light exit surfaces, where they are the separators leave and form the light beam of the desired shape in the overlay.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP01125232A 2000-10-26 2001-10-24 Système d' éclairage, notamment pour véhicule automobile, et méthode pour produire un faisceau de lumière de forme désirée Withdrawn EP1201985A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10053098 2000-10-26
DE10053098A DE10053098A1 (de) 2000-10-26 2000-10-26 Beleuchtungssystem, insbesondere für Kraftfahrzeuge und Verfahren zur Erzeugung eines Lichtbündels gewünschter Form

Publications (1)

Publication Number Publication Date
EP1201985A2 true EP1201985A2 (fr) 2002-05-02

Family

ID=7661132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01125232A Withdrawn EP1201985A2 (fr) 2000-10-26 2001-10-24 Système d' éclairage, notamment pour véhicule automobile, et méthode pour produire un faisceau de lumière de forme désirée

Country Status (6)

Country Link
US (1) US6558031B2 (fr)
EP (1) EP1201985A2 (fr)
JP (1) JP2002150814A (fr)
KR (1) KR20020032325A (fr)
CN (1) CN1354340A (fr)
DE (1) DE10053098A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20030583A1 (it) * 2003-07-25 2005-01-26 Automotive Lighting Italia Spa Dispositivo di illuminazione per veicoli con riflettore
US6945681B2 (en) * 2003-09-24 2005-09-20 General Motors Corporation Headlamp assemblies and optical bodies for use therewith
US7044623B2 (en) * 2003-11-21 2006-05-16 Deepsea Power & Light Thru-hull light
US7677760B2 (en) * 2004-01-14 2010-03-16 Simon Jerome H Efficient and uniformly distributed illumination from multiple source luminaires
US7597453B2 (en) * 2004-01-14 2009-10-06 Simon Jerome H Luminaires using multiple quasi-point sources for unified radially distributed illumination
US20070137544A1 (en) * 2005-09-09 2007-06-21 Macdonald Ian M Two piece view port and light housing
US7513665B2 (en) * 2006-05-16 2009-04-07 Visteon Global Technologies, Inc. Headlamp module and headlamp assembly with internally reflecting translucent member
US7604383B2 (en) * 2006-06-29 2009-10-20 Magna International Reconfigurable headlamp and a control system for reconfiguring a vehicle lighting system
US20080130304A1 (en) * 2006-09-15 2008-06-05 Randal Rash Underwater light with diffuser
DE102009013812A1 (de) * 2009-03-18 2010-09-23 Osram Gesellschaft mit beschränkter Haftung Reflektor, Lichtquellenanordnung sowie Projektorgerät
DE102011055988A1 (de) * 2011-12-02 2013-06-06 Hella Kgaa Hueck & Co. Optikelement für eine Beleuchtungsvorrichtung
KR102491854B1 (ko) 2017-09-29 2023-01-26 삼성전자주식회사 분광기

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07104562B2 (ja) * 1989-06-02 1995-11-13 富士ゼロックス株式会社 カラー画像記録装置の照明用光源
US5897201A (en) * 1993-01-21 1999-04-27 Simon; Jerome H. Architectural lighting distributed from contained radially collimated light

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
CN1354340A (zh) 2002-06-19
US20020085384A1 (en) 2002-07-04
US6558031B2 (en) 2003-05-06
KR20020032325A (ko) 2002-05-03
DE10053098A1 (de) 2002-05-08
JP2002150814A (ja) 2002-05-24

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