EP1054210B1 - Scheinwerfer nach dem Projektionstyp für Kraftfahrzeuge - Google Patents

Scheinwerfer nach dem Projektionstyp für Kraftfahrzeuge Download PDF

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Publication number
EP1054210B1
EP1054210B1 EP00304175A EP00304175A EP1054210B1 EP 1054210 B1 EP1054210 B1 EP 1054210B1 EP 00304175 A EP00304175 A EP 00304175A EP 00304175 A EP00304175 A EP 00304175A EP 1054210 B1 EP1054210 B1 EP 1054210B1
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EP
European Patent Office
Prior art keywords
reflector
internal
light
external
headlamp according
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.)
Expired - Lifetime
Application number
EP00304175A
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English (en)
French (fr)
Other versions
EP1054210A2 (de
EP1054210A3 (de
Inventor
Milan Cejnek
David Vozenilek
Jaroslav Purma
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.)
Hanon Systems Autopal Services sro
Original Assignee
Autopal sro
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Filing date
Publication date
Application filed by Autopal sro filed Critical Autopal sro
Publication of EP1054210A2 publication Critical patent/EP1054210A2/de
Publication of EP1054210A3 publication Critical patent/EP1054210A3/de
Application granted granted Critical
Publication of EP1054210B1 publication Critical patent/EP1054210B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/335—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with continuity at the junction between adjacent areas
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • 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 headlamps of projecting model for motor vehicles comprised of an internal and an external reflectors, a light source, a shade and an objective.
  • the internal reflector is in the form of a free surface with one focus situated in proximity of the light source and the other focus situated in the space between the reflector and the objective.
  • the external reflector takes also the form of a free surface but with one focus situated in proximity of the light source and the other focus situated off the headlamp optical system.
  • the method of integrating the dimmed and the long-distance beams is solved by means of changing shade positions what makes possible to change light beam geometry and intensity as a consequence of different concentration effects of the internal and the external reflectors.
  • the commercially used two-functional projecting systems that comprise of two models of reflectors, an internal one and an external one, an objective, a light source and shading elements and providing two basic headlamp modes, the long-distance and the dipped modes, exhibit generally the following design, structure and function of individual parts.
  • the external and the internal reflectors form one assembly, i.e. a corpus, or at least the external reflector begins there where the internal one ends.
  • the shading elements have only limited possibilities of movement during switching them between the long-distance and the dipped modes. Therefore, in case of both modes they have to be maintained within the optical system.
  • the internal reflector is of an elliptical form and the external one is of a parabolic form both having one common focus in proximity of the light source.
  • a disadvantage remains to be that by means of the reflectors with purely elliptical or parabolic reflecting surfaces it is very difficult or even impossible to obtain a satisfactory light distribution in front of an automobile.
  • a projecting headlamp as defined in claim 1 that is comprised of an independent internal and an external reflectors having the forms of free surfaces, an objective, a light source, an internal shade and two external shades.
  • the internal reflector integrates light emitted by a light source and passing through a focus plane of said objective and further through said objective and the external reflector reflects light emitted by a light source into a direction which goes outside the objective.
  • the first focus is situated in proximity of the light source and the other focus is situated in proximity of the objective focus.
  • the first focus of the external reflector is situated in proximity the light source and the other focus is situated off the optical system.
  • a spiralled filament of a halogen lamp or an arc discharge can serve as a light source.
  • the switching device which is mounted on the carrying frame, shifts all shades to such positions in which none of said shades obstructs the out shining light beam and on a road surface two light traces are added, i.e. the one produced by the internal and the one produced by the external reflectors.
  • the internal reflector collimates the whole light beam and produces a light trace having no boundary between light and darkness and the external reflector shines into the area of maximum intensity of said light trace.
  • the Figures 1, 2 and 3 show an embodiment of a two-functional projector system which is comprised of a light source 1 , an internal reflector 2 , an external reflector 3 , an objective 4 an internal shade 51 , external shades 61 and 62 , a frame 7 , an electric part 8 and a moving mechanism 9 .
  • the internal reflector 2 is in the form of a free surface provided with a diffusion pattern to improve beam homogeneity and was made of a reflector 19 by cutting it in the positions of cutting curves 17 and 18 .
  • One focus F1 of this internal reflector 2 is situated in proximity of optical x-axis of the system and the other focus F2 is situated in the space between the internal reflector 2 and the objective 4 .
  • the external reflector 3 is separated from the internal reflector 2 and it takes the form of a free surface with one focus F1 common with that of the internal reflector 2 and the other focus is situated off the optical system.
  • the light source 1 is situated in proximity of the focus F1.
  • the light source 1 can be e.g. a spiralled filament of a bulb or an arc of a discharge lamp.
  • an internal shade 51 is placed in vertical position in the space between the internal reflector 2 and the objective 4 so that a part of the horizontal edge of said shade 51 is situated in proximity of the focus F2 which focus F2 is simultaneously the focus of the objective 4 .
  • This objective 4 is situated in front of the whole optical system and it is of aspheric shape to decrease optical aberrations.
  • the moving mechanism 9 is fixed to a carrying frame 7 situated on the bottom side of the headlamp and it is driven by the electric part 8 .
  • the rays emitted by the light source 1 are collimated by the internal reflector 2 into the space of the focus F2 of the objective 4 and this objective 4 projects the internal shade 51 on the light background of the reflector 2 on the road surface and produces so the light trace 12 , see Fig. 4, which trace 12 is situated below the light and darkness boundary 15 .
  • the external shades 61 and 62 obstruct path of rays emitted by the light source in the direction to the external reflector 3 .
  • arms of the moving mechanism 9 having external shades 61 and 62 fixed to them form an angle ⁇ from 10° to 180°.
  • the mechanism 9 provides switching of shade 51 into the position 52 and switching of shades 61 and 62 into the positions 63 and 64 so that none of the shades for this mode obstructs any of the light beams that produce a sum of the traces 12 and 13 produced by the reflector 2 and the trace 14 produced by the reflector 3 that is not collimated by objective 4 on the road surface.
  • the traces 12 and 13 exhibit a broad side diffusion, the trace 14 is concentrated into the area of the maximum light beam intensity.
  • the arms of the moving mechanism 9 having external shades 61 and 62 fixed on them, perform rotational movement around the axis of rotation 16 into the position where the opening of both arms of the moving mechanism 9 forms an angle ⁇ from 30° to 360° and simultaneously the internal shade 51 rotates around the axis of rotation 11 by an angle ⁇ from 0° to 180° or it can perform any translational or rotational movements or a combination of said basic movements.
  • the external shades 61 and 62 can have each their own axis of rotation or they can perform any translational or rotational movements or a combination of such movements.
  • D is smaller or equal to V, whereby, D is the diameter of the objective 4 and V is the maximum dimension of the external reflector 3 .
  • the present invention will find use in vehicles operated on surface communications.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (17)

  1. Projektionsscheinwerfer für Kraftfahrzeuge, der für den Betrieb mit Femlicht- und Abblendlichtstrahlen bereitgestellt wird, bestehend aus einer Lichtquelle (1), einem Innenreflektor (2), einem Objektiv (4), einem Innenschirm (51), einem Rahmen (7), einem elektrischen Teil (8) und einem Verschiebemechanismus (9), dadurch gekennzeichnet, dass der Scheinwerfer außerdem einen Außenreflektor (3) und Außenschirme (61, 62) umfasst, wobei für den Abblendlichtbetrieb das Objektiv (4) den Innenschirm (51) auf hellem Hintergrund des Innenreflektors (2) auf eine Fahrbahn projiziert, wo er eine Leuchtspur (12) erzeugt, und die Außenschirme (61, 62) Strahlen blockieren, die von der Lichtquelle (1) in der Richtung zu dem Außenreflektor (3) abgestrahlt werden, der von dem Innenreflektor (2) abgetrennt ist, und wobei für den Fernlichtbetrieb der Verschiebemechanismus (9), der am Rahmen (7) befestigt ist, für das Umschalten des Innenschirms (51) von einer Abblendlicht-Betriebsposition zu einer Femlicht-Betriebsposition (52) und für das Umschalten der Außenschirme (61, 62) von den Abblendlicht-Betriebspositionen zu den Femlicht-Betriebspositionen (63, 64) sorgt, wobei die Femlicht-Betriebspositionen der Innen- und Außenschirme außerhalb der Lichtstrahlen liegen, die die Leuchtspuren (12, 13), die vom Innenreflektor (21) erzeugt werden, und die Leuchtspur (14), die vom Außenreflektor (3) ohne Kollimation durch das Objektiv (4) erzeugt wird, auf einer Fahrbahn bilden.
  2. Scheinwerfer nach Anspruch 1, dadurch gekennzeichnet, dass, in der Abblendlicht-Betriebsposition des Innenschirms (51), ein Teil des Innenschirms (51) horizontal und in der Nähe der horizontalen Linie des Scheinwerfers und außerdem in der Nähe des Brennpunktes (F2) des Objektivs (4) angeordnet ist..
  3. Scheinwerfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Innenschirm (51) eine Drehachse (11) aufweist und der Drehwinkel (α) zwischen der Abblendlicht-Betriebsposition und der Femlicht-Betriebsposition (52) im Bereich von 0° bis 180° liegt.
  4. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen der Abblendlicht- und der Femlicht-Betriebsposition der Innenschirm (51) eine Translationsbewegung oder eine Rotationsbewegung oder eine Kombination aus beiden Bewegungen ausführt.
  5. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Außenschirme (61, 62) eine gemeinsame Drehachse (16) aufweisen und der Winkel (β) zwischen den Abblendlicht-Betriebspositionen im Bereich von 10° bis 180° liegt und der Winkel (γ) zwischen den Fernlicht-Betriebspositionen (63, 64) im Bereich von 30° bis 360° liegt.
  6. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder der Außenschirme (61, 62) eine Drehachse aufweist oder eine Translationsbewegung oder eine Bewegung ausführt, die aus einer Drehung und einer Translation zwischen der Abblendlicht-Betriebsposition und der Fernlicht-Betriebsposition (63, 64) besteht.
  7. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Durchmesser (D) des Objektivs (4) gleich der größten horizontalen oder kleiner als die größte horizontale Abmessung (V) des Außenreflektors (3) ist.
  8. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Innenreflektor (2) eine freie Fläche mit einem Brennpunkt (F1) in der Nähe der Lichtquelle (1) und einem weiteren Brennpunkt (F2) zwischen der Lichtquelle (1) und dem Objektiv (4) ist.
  9. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Innenreflektor (2) zur Verbesserung der Leuchtspurhomogenität mit optischen Streustrukturen versehen ist.
  10. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Außenreflektor (3) die Form einer freien Fläche hat, die einen Brennpunkt (F1) in der Nähe der Lichtquelle (1) und einen weiteren Brennpunkt außerhalb des optischen Systems aufweist.
  11. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Außenreflektor (3) zur Verbesserung der Strahlhomogenität mit einer Streustruktur versehen ist.
  12. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Außenreflektor (3) in zwei Teile unterteilt ist, vorzugsweise einen linken und einen rechten, oder in eine Vielzahl von unabhängigen Teilen.
  13. Scheinwerfer nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Lichtquelle (1) eine seitlich oder axial positionierte, spiralförmig gedrehte Wendel einer Halogenlampe ist, wobei die Wendel in der Nähe eines Brennpunktes (F1) des Innenreflektors (2) angeordnet ist.
  14. Scheinwerfer nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Lichtquelle (1) eine seitlich oder axial positionierte Lichtbogen-Gasentladung ist, wobei der Lichtbogen in der Nähe eines Brennpunktes (F1) des Innenreflektors (2) angeordnet ist.
  15. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Objektiv (4) zur Minimierung von optischen Aberrationen eine asphärische Form hat.
  16. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Außenreflektor (3) die Form eines Reflektors (19) im gesamten Raum um die Achse (X) herum in einem Winkelbereich von 0° bis 360° annimmt oder durch etwaige Schnittkurven (17, 18) begrenzt wird.
  17. Scheinwerfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Lichtstrahl einer ersten Leuchtspur (12) unterhalb einer Hell-Dunkel-Grenze (15) gebündelt wird, der Lichtstrahl einer zweiten Spur (13) oberhalb einer Hell-Dunkel-Grenze (15) gebündelt wird und der Lichtstrahl einer dritten Spur (14) in einem Bereich von maximaler Lichtstrahlintensität gebündelt wird.
EP00304175A 1999-05-17 2000-05-17 Scheinwerfer nach dem Projektionstyp für Kraftfahrzeuge Expired - Lifetime EP1054210B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ19991738A CZ9901738A3 (cs) 1999-05-17 1999-05-17 Projekční světlomet pro motorová vozidla
CZ173899 1999-05-17

Publications (3)

Publication Number Publication Date
EP1054210A2 EP1054210A2 (de) 2000-11-22
EP1054210A3 EP1054210A3 (de) 2002-02-20
EP1054210B1 true EP1054210B1 (de) 2006-07-05

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EP00304175A Expired - Lifetime EP1054210B1 (de) 1999-05-17 2000-05-17 Scheinwerfer nach dem Projektionstyp für Kraftfahrzeuge

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EP (1) EP1054210B1 (de)
CZ (1) CZ9901738A3 (de)
DE (1) DE60029163T2 (de)
ES (1) ES2277585T3 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60123370T2 (de) * 2000-12-25 2007-08-23 Stanley Electric Co. Ltd. Fahrzeugscheinwerfer mit einer verstellbaren Blende und einer verstellbaren Reflektorfläche zur Erzeugung eines Abblend- und Fernlichtbündels
JP5592183B2 (ja) * 2010-07-16 2014-09-17 株式会社小糸製作所 車両用灯具

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3528820C2 (de) * 1985-08-10 1994-02-24 Bosch Gmbh Robert Abblendlicht- oder Nebellichtscheinwerfer für Kraftfahrzeuge
IT1247780B (it) * 1990-11-16 1994-12-30 Carello Spa Proiettore ellittico a due luci per veicoli
JPH05347101A (ja) * 1992-06-12 1993-12-27 Stanley Electric Co Ltd プロジェクタ型灯具
DE19756437A1 (de) * 1997-12-18 1999-06-24 Bosch Gmbh Robert Scheinwerfer für Fahrzeuge für Abblendlicht und Fernlicht

Also Published As

Publication number Publication date
EP1054210A2 (de) 2000-11-22
CZ9901738A3 (cs) 2001-01-17
DE60029163T2 (de) 2007-06-28
ES2277585T3 (es) 2007-07-16
DE60029163D1 (de) 2006-08-17
EP1054210A3 (de) 2002-02-20

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