EP0534168B1 - Motor vehicle headlamp - Google Patents

Motor vehicle headlamp Download PDF

Info

Publication number
EP0534168B1
EP0534168B1 EP92114817A EP92114817A EP0534168B1 EP 0534168 B1 EP0534168 B1 EP 0534168B1 EP 92114817 A EP92114817 A EP 92114817A EP 92114817 A EP92114817 A EP 92114817A EP 0534168 B1 EP0534168 B1 EP 0534168B1
Authority
EP
European Patent Office
Prior art keywords
reflector
paraboloid
segment
optical axis
light
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
EP92114817A
Other languages
German (de)
French (fr)
Other versions
EP0534168A2 (en
EP0534168A3 (en
Inventor
Rainer Dr. Dipl.-Phys. Neumann
Karl Ruoff
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0534168A2 publication Critical patent/EP0534168A2/en
Publication of EP0534168A3 publication Critical patent/EP0534168A3/en
Application granted granted Critical
Publication of EP0534168B1 publication Critical patent/EP0534168B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F21S41/30—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
    • F21S41/338—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having surface portions added to its general concavity
    • 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

Definitions

  • the invention relates to a headlight for motor vehicles according to the preamble of claim 1.
  • Such a headlight is known from DE-A1 37 31 232.
  • This headlamp is a pure low beam headlamp and has a reflector which is divided into several segments with different reflective surfaces. The reflector is delimited at the top and bottom by essentially flat surfaces.
  • a light source with a luminous element extending parallel to the optical axis of the reflector is inserted into the reflector.
  • the light outlet opening of the headlight is covered with a lens.
  • the headlamp according to the invention for motor vehicles with the characterizing features of claim 1 has the advantage that light is reflected from the lower boundary surface by its strong inclination in an area below the light-dark boundary and can thus be used for light distribution.
  • FIG. 1 shows the reflector of a headlight in the rear view
  • FIG. 2 shows the reflector in longitudinal section along line II-II in FIG. 1
  • FIG. 3 shows the light distribution generated by the reflector on a measuring screen.
  • a headlight for motor vehicles has a reflector 10 which is divided into four segments and has an opening 12 for the passage of an incandescent lamp 14.
  • the incandescent lamp 14 has an axial incandescent filament 16 which extends approximately along the optical axis 18 of the reflector 10.
  • a lens 20 Arranged in front of the reflector 10 is a lens 20, which can be arranged both inclined with respect to a vertical axis and pivoted with respect to a transverse axis.
  • the reflector has a left segment 22 in the form of a paraboloid of revolution and a right segment 24 in the form of a paraboloid ellipsoid when viewed in the direction of light.
  • the paraboloid ellipsoid of the right segment 24 contains part of an ellipse in a horizontal central section and part of a parabola in a vertical central section. In the transition from the horizontal mid-section to the vertical mid-section, the resulting intersection curve gradually changes from the ellipse to the parabola.
  • the reflector 10 has a left segment 26 in the form of a general paraboloid and a right segment 28 in the form of a paraboloid ellipsoid.
  • the general paraboloid of the lower left segment 26 contains different parabolas in different axial longitudinal sections.
  • the transition between the left upper segment 22 and the left lower segment 26 runs in a plane inclined downward by approximately 15 ° about the optical axis 18.
  • the transition between the upper right segment 24 and the lower right segment 28 runs approximately in a horizontal central plane.
  • the focal point F22 of the paraboloid of the upper left segment 22 lies in the end region of the incandescent filament 16 facing the apex of the reflector 10.
  • the focal point F26 which is the vertical axis mid section through the general paraboloid of the lower left segment 26, lies in the end region pointing away from the reflector apex the incandescent filament 16.
  • the focal point moves from the focal point F26 towards the focal point F22 of the upper left segment 22.
  • the first focal point F24 which is located in the The vertical axial central section of the parabola of the paraboloid ellipsoid of the upper right segment 24 coincides approximately with the focal point F22 of the upper left segment 22.
  • the first focal point F28 which results in the vertical axial center section through the paraboloid ellipsoid of the lower right segment 28 Parabola coincides approximately with focal point F26, the parabola resulting in the vertical section through the general paraboloid of segment 26.
  • the first focal point F28 of the lower right segment 28 moves in the direction of the center of the incandescent filament 16.
  • the reflector 10 is delimited on its top and on its underside by essentially flat surfaces 30, 32.
  • the boundary surfaces 30, 32 are arranged inclined with respect to the optical axis 18 of the reflector.
  • the upper boundary surface 30 is inclined upward by approximately 2 ° to 3 ° with respect to the optical axis 18.
  • the lower boundary surface 32 is in relation to an in Figure 2 drawn parallels 34 to the optical axis 18 in the light direction by an angle ⁇ of about 5 ° to 7 ° downward.
  • the upper and lower boundary surfaces 30, 32 like the segments 22 to 28, are provided with a reflective coating. Light emitted by the incandescent filament 16 and reflected by the lower segment 26 or 28 can strike the lower boundary surface 32 and is reflected again by the latter. Due to the inclination of the lower boundary surface 32, which is preferably 6 °, light is reflected from this approximately parallel to the optical axis 18 of the reflector or slightly inclined downwards to it.
  • FIG. 3 shows the light distribution generated by the reflector 10 on a measuring screen, light being reflected from the lower boundary surface 32 into areas 36 which lie below a prescribed light / dark limit 38.
  • the lower boundary surface 32 can be provided with scattering profiles 40 which extend approximately along the optical axis of the reflector and are indicated by dashed lines in FIG. 2.
  • the scattering profiles 40 can be designed as ribs or grooves or the like, which extend in the direction of the optical axis 18, in order to ensure that the reflector 10 can be easily removed from the mold during its manufacture.
  • the scattering profiles 40 reflect horizontally scattered light from the lower segments 26 or 28. As a result of this design of the lower boundary surface 32, the light reflected by it needs through the lens 20 to be scattered little and contributes to good lighting of the apron in front of the vehicle.
  • the upper left segment 22 of the reflector 10 can also be designed as a paraboloid of revolution, the upper right segment 24 as a general paraboloid, the lower left segment 26 as a general paraboloid and the lower right segment 28 as a paraboloid of revolution.
  • This design of the segments of the reflector 10 also produces a low beam distribution which meets the legal requirements without the need for a lens with optically active elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Scheinwerfer für Kraftfahrzeuge nach der Gattung des Anspruchs 1.The invention relates to a headlight for motor vehicles according to the preamble of claim 1.

Ein solcher Scheinwerfer ist durch die DE-A1 37 31 232 bekannt. Dieser Scheinwerfer ist ein reiner Abblendlichtscheinwerfer und weist einen Reflektor auf, der in mehrere Segmente mit unterschiedlichen Reflexionsflächen unterteilt ist. Der Reflektor ist durch im wesentlichen ebene Flächen nach oben und nach unten begrenzt. In den Reflektor ist eine Lichtquelle mit einem sich parallel zur optischen Achse des Reflektors erstreckenden Leuchtkörper eingesetzt. Die Lichtaustrittsöffnung des Scheinwerfers ist mit einer Lichtscheibe abgedeckt.Such a headlight is known from DE-A1 37 31 232. This headlamp is a pure low beam headlamp and has a reflector which is divided into several segments with different reflective surfaces. The reflector is delimited at the top and bottom by essentially flat surfaces. A light source with a luminous element extending parallel to the optical axis of the reflector is inserted into the reflector. The light outlet opening of the headlight is covered with a lens.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Scheinwerfer für Kraftfahrzeuge mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß von der unteren Begrenzungsfläche durch deren stärk Neigung Licht in einen Bereich unterhalb der Hell-Dunkel-Grenze reflektiert wird und somit für die Lichtverteilung genutzt werden kann.The headlamp according to the invention for motor vehicles with the characterizing features of claim 1 has the advantage that light is reflected from the lower boundary surface by its strong inclination in an area below the light-dark boundary and can thus be used for light distribution.

In den Unteransprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen des Scheinwerfers gekennzeichnet. Durch die im Anspruch 4 gekennzeichnete Ausbildung der unteren Begrenzungsfläche wird von dieser Licht horizontal gestreut reflektiert, so daß durch die Lichtscheibe keine starke Streuung mehr hervorgerufen zu werden braucht.Advantageous refinements and developments of the headlamp are characterized in the subclaims. Due to the formation of the lower boundary surface characterized in claim 4, this light is reflected horizontally scattered, so that no strong scattering needs to be caused by the lens.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläuert. Es zeigen Figur 1 den Reflektor eines Scheinwerfers in der Rückansicht, Figur 2 den Reflektor im Längsschnitt entlang Linie II-II in Figur 1 und Figur 3 die vom Reflektor auf einem Meßschirm erzeugte Lichtverteilung.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. FIG. 1 shows the reflector of a headlight in the rear view, FIG. 2 shows the reflector in longitudinal section along line II-II in FIG. 1 and FIG. 3 shows the light distribution generated by the reflector on a measuring screen.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Ein Scheinwerfer für Kraftfahrzeuge weist einen Reflektor 10 auf, der in vier Segmente unterteilt ist und eine Öffnung 12 zum Durchtritt einer Glühlampe 14 hat. Die Glühlampe 14 weist eine axiale Glühwendel 16 auf, die sich etwa entlang der optischen Achse 18 des Reflektors 10 erstreckt. Vor dem Reflektor 10 ist eine Lichtscheibe 20 angeordnet, die sowohl bezüglich einer Hochachse geneigt als auch bezüglich einer Querachse geschwenkt angeordnet sein kann.A headlight for motor vehicles has a reflector 10 which is divided into four segments and has an opening 12 for the passage of an incandescent lamp 14. The incandescent lamp 14 has an axial incandescent filament 16 which extends approximately along the optical axis 18 of the reflector 10. Arranged in front of the reflector 10 is a lens 20, which can be arranged both inclined with respect to a vertical axis and pivoted with respect to a transverse axis.

Oberhalb der optischen Achse 18 weist der Reflektor in Lichtrichtung gesehen ein linkes Segment 22 in Form eines Rotationsparaboloids und ein rechtes Segment 24 in Form eines Paraboloid-Ellipsoids auf. Das Paraboloid-Ellipsoid des rechten Segments 24 enthält in einem horizontalen Mittelschnitt einen Teil einer Ellipse und in einem vertikalen Mittelschnitt einen Teil einer Parabel. Beim Übergang vom horizontalen Mittelschnitt zum vertikalen Mittelschnitt geht dabei die sich ergebende Schnittkurve von der Ellipse allmählich über in die Parabel. Unterhalb der optischen Achse 18 weist der Reflektor 10 ein linkes Segemnt 26 in Form eines allgemeinen Paraboloids auf und ein rechtes Segment 28 in Form eines Paraboloid-Ellipsoids. Das allgemeine Paraboloid des unteren linken Segments 26 enthält in verschiedenen axialen Längsschnitten unterschiedliche Parabeln. Der Übergang zwischen dem linken oberen Segment 22 und dem linken unteren Segment 26 verläuft in einer um etwa 15° um die optische Achse 18 nach unten geneigten Ebene. Der Übergang zwischen dem rechten oberen Segment 24 und dem rechten unteren Segment 28 verläuft etwa in einer horizontalen Mittelebene.Above the optical axis 18, the reflector has a left segment 22 in the form of a paraboloid of revolution and a right segment 24 in the form of a paraboloid ellipsoid when viewed in the direction of light. The paraboloid ellipsoid of the right segment 24 contains part of an ellipse in a horizontal central section and part of a parabola in a vertical central section. In the transition from the horizontal mid-section to the vertical mid-section, the resulting intersection curve gradually changes from the ellipse to the parabola. Below the optical axis 18, the reflector 10 has a left segment 26 in the form of a general paraboloid and a right segment 28 in the form of a paraboloid ellipsoid. The general paraboloid of the lower left segment 26 contains different parabolas in different axial longitudinal sections. The transition between the left upper segment 22 and the left lower segment 26 runs in a plane inclined downward by approximately 15 ° about the optical axis 18. The transition between the upper right segment 24 and the lower right segment 28 runs approximately in a horizontal central plane.

Der Brennpunkt F22 des Paraboloids des oberen linken Segments 22 liegt im zum Scheitel des Reflektors 10 weisenden Endbereich der Glühwendel 16. Der Brennpunkt F26, der sich im vertikalen axialen Mittelschnitt durch das allgemeine Paraboloid des linken unteren Segments 26 ergebenden Parabel liegt im vom Reflektorscheitel wegweisenden Endbereich der Glühwendel 16. Beim Übergang vom vertikalen axialen Mittelschnitt zum horizontalen axialen Mittelschnitt wandert der Brennpunkt, der sich im jeweiligen Schnitt ergebenden Parabel des allgemeinen Paraboloids vom Brennpunkt F26 in Richtung zum Brennpunkt F22 des linken oberen Segments 22. Der erste Brennpunkt F24, der sich im vertikalen axialen Mittelschnitt ergebenden Parabel des Paraboloid-Ellipsoids des rechten oberen Segments 24 fällt etwa mit dem Brennpunkt F22 des oberen linken Segments 22 zusammen. Beim Übergang vom vertikalen axialen Mittelschnitt zum horizontalen axialen Mittelschnitt wandert der erste Brennpunkt F24 des oberen rechten Segments 24 in Richtung zur Mitte der Glühwendel 16. Der erste Brennpunkt F28, der sich im vertikalen axialen Mittelschnitt durch das Paraboloid-Ellipsoid des unteren rechten Segments 28 ergebenden Parabel fällt etwa mit dem Brennpunkt F26, der sich im Vertikalschnitt durch das allgemeine Paraboloid des Segments 26 ergebenden Parabel zusammen. Beim Übergang vom vertikalen axialen Mittelschnitt zum horizontalen axialen Mittelschnitt wandert der erste Brennpunkt F28 des unteren rechten Segments 28 in Richtung zur Mitte der Glühwendel 16.The focal point F22 of the paraboloid of the upper left segment 22 lies in the end region of the incandescent filament 16 facing the apex of the reflector 10. The focal point F26, which is the vertical axis mid section through the general paraboloid of the lower left segment 26, lies in the end region pointing away from the reflector apex the incandescent filament 16. During the transition from the vertical axial center section to the horizontal axial center section, the focal point, the parabola of the general paraboloid resulting in the respective section, moves from the focal point F26 towards the focal point F22 of the upper left segment 22. The first focal point F24, which is located in the The vertical axial central section of the parabola of the paraboloid ellipsoid of the upper right segment 24 coincides approximately with the focal point F22 of the upper left segment 22. In the transition from the vertical axial center section to the horizontal axial center section, the first focal point F24 of the upper right segment 24 moves toward the center of the filament 16. The first focal point F28, which results in the vertical axial center section through the paraboloid ellipsoid of the lower right segment 28 Parabola coincides approximately with focal point F26, the parabola resulting in the vertical section through the general paraboloid of segment 26. During the transition from the vertical axial central cut to the horizontal axial central cut, the first focal point F28 of the lower right segment 28 moves in the direction of the center of the incandescent filament 16.

Der Reflektor 10 ist an seiner Oberseite und an seiner Unterseite duch im wesentlichen ebene Flächen 30, 32 begrenzt. Die Begrenzungsflächen 30, 32 sind bezüglich der optischen Achse 18 des Reflektors geneigt angeordnet. Die obere Begrenzungsfläche 30 ist um etwa 2° bis 3° bezüglich der optischen Achse 18 in Lichtrichtung nach oben geneigt. Die untere Begrenzungsfläche 32 ist bezüglich einer in Figur 2 eingezeichneten Parallelen 34 zur optischen Achse 18 in Lichtrichtung um einen Winkel α von etwa 5° bis 7° nach unten geneigt. Die obere und untere Begrenzungsfläche 30, 32 ist wie die Segmente 22 bis 28 mit einer reflektierenden Beschichtung versehen. Von der Glühwendel 16 ausgesandtes und von dem unteren Segment 26 oder 28 reflektiertes Licht kann auf die untere Begrenzungsfläche 32 treffen und wird von dieser nochmals reflektiert. Durch die Neigung der unteren Begrenzungsfläche 32, die vorzugsweise 6° beträgt, wird von dieser Licht etwa parallel zur optischen Achse 18 des Reflektors oder leicht zu dieser nach unten geneigt reflektiert.The reflector 10 is delimited on its top and on its underside by essentially flat surfaces 30, 32. The boundary surfaces 30, 32 are arranged inclined with respect to the optical axis 18 of the reflector. The upper boundary surface 30 is inclined upward by approximately 2 ° to 3 ° with respect to the optical axis 18. The lower boundary surface 32 is in relation to an in Figure 2 drawn parallels 34 to the optical axis 18 in the light direction by an angle α of about 5 ° to 7 ° downward. The upper and lower boundary surfaces 30, 32, like the segments 22 to 28, are provided with a reflective coating. Light emitted by the incandescent filament 16 and reflected by the lower segment 26 or 28 can strike the lower boundary surface 32 and is reflected again by the latter. Due to the inclination of the lower boundary surface 32, which is preferably 6 °, light is reflected from this approximately parallel to the optical axis 18 of the reflector or slightly inclined downwards to it.

In Figur 3 ist die vom Reflektor 10 auf einem Meßschirm erzeugte Lichtverteilung dargestellt, wobei von der unteren Begrenzungsfläche 32 Licht in Bereiche 36 reflektiert wird, die unterhalb einer vorgeschriebenen Hell-Dunkel-Grenze 38 liegen. Mit zunehmender Erstreckung der unteren Bergrenzungsfläche 32 in Richtung der optischen Achse 18 kann dabei mehr von der unteren Begrenzungsfläche reflektiertes Licht für die Lichtverteilung genutzt werden, da mehr Licht von den unteren Segmenten 26, 28 auf die Begrenzungsfläche trifft.FIG. 3 shows the light distribution generated by the reflector 10 on a measuring screen, light being reflected from the lower boundary surface 32 into areas 36 which lie below a prescribed light / dark limit 38. With increasing extension of the lower boundary surface 32 in the direction of the optical axis 18, more light reflected from the lower boundary surface can be used for the light distribution, since more light from the lower segments 26, 28 strikes the boundary surface.

Bei einer Variante kann die untere Begrenzungsfläche 32 mit sich etwa entlang der optischen Achse des Reflektors erstreckenden Streuprofilen 40 versehen sein, die in Figur 2 gestrichelt angedeutet sind. Die Streuprofile 40 können als Rippen oder Rillen oder ähnliches ausgeführt sein, die sich in Richtung der optischen Achse 18 erstrecken, um eine leichte Entformbarkeit des Reflektors 10 bei dessen Herstellung sicherzustellen. Durch die Streuprofile 40 wird von den unteren Segmenten 26 oder 28 auf diese treffendes Licht horizontal gestreut reflektiert. Durch diese Ausbildung der unteren Begrenzungsfläche 32 braucht das von dieser reflektierte Licht durch die Lichtscheibe 20 nur noch wenig gestreut zu werden und trägt zu einer guten Beleuchtung des Vorfelds der Fahrbahn vor dem Kraftfahrzeug bei.In a variant, the lower boundary surface 32 can be provided with scattering profiles 40 which extend approximately along the optical axis of the reflector and are indicated by dashed lines in FIG. 2. The scattering profiles 40 can be designed as ribs or grooves or the like, which extend in the direction of the optical axis 18, in order to ensure that the reflector 10 can be easily removed from the mold during its manufacture. The scattering profiles 40 reflect horizontally scattered light from the lower segments 26 or 28. As a result of this design of the lower boundary surface 32, the light reflected by it needs through the lens 20 to be scattered little and contributes to good lighting of the apron in front of the vehicle.

Bei einer nicht dargestellten Variante kann das obere linke Segment 22 des Reflektors 10 auch als ein Rotationsparaboloid ausgebildet sein, das obere rechte Segment 24 als ein allgemeines Paraboloid, das untere linke Segment 26 als ein allgemeines Paraboloid und das untere rechte Segment 28 als Rotationsparaboloid. Auch durch diese Ausbildung der Segmente des Reflektors 10 erzeugt dieser bereits eine Abblendlichtverteilung, die gesetzlichen Vorschriften genügt, ohne daß eine Lichtscheibe mit optisch wirksamen Elementen erforderlich ist.In a variant not shown, the upper left segment 22 of the reflector 10 can also be designed as a paraboloid of revolution, the upper right segment 24 as a general paraboloid, the lower left segment 26 as a general paraboloid and the lower right segment 28 as a paraboloid of revolution. This design of the segments of the reflector 10 also produces a low beam distribution which meets the legal requirements without the need for a lens with optically active elements.

Claims (4)

  1. Headlamp for motor vehicles having a reflector (10), which is subdivided into a plurality of segments (22, 24, 26, 28) and is bounded above and below by essentially planar surfaces (30, 32), having a light source (16), having an illuminant (16) which extends approximately in the direction of the optical axis (18) of the reflector (10) and having a lamp glass (20) covering the light exit opening of the headlamp, characterized in that the lower bounding surface (32) is designed to be reflecting and, with respect to the optical axis (18) of the reflector (10) in the light direction, is inclined downwards by an angle α of about 5 to 7 degrees.
  2. Headlamp according to Claim 1, characterized in that the reflector (10) has, above and below the optical axis (18), in each case one segment (22, 26) in the form of a paraboloid of rotation or in the form of a general paraboloid and a segment (24, 28) in the form of a paraboloid-ellipsoid.
  3. Headlamp according to Claim 1, characterized in that the reflector (10) has, above and below the optical axis (18) in each case, a segment (22, 28) in the form of a paraboloid of rotation and a segment (24, 26) in the form of a general paraboloid.
  4. Headlamp according to one of the preceding claims, characterized in that the lower bounding surface (32) is provided with scattering profiles (40), which extend essentially in the direction of the optical axis (18), and by which light is reflected horizontally scattered.
EP92114817A 1991-09-21 1992-08-29 Motor vehicle headlamp Expired - Lifetime EP0534168B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4131483 1991-09-21
DE4131483A DE4131483A1 (en) 1991-09-21 1991-09-21 HEADLIGHTS FOR MOTOR VEHICLES

Publications (3)

Publication Number Publication Date
EP0534168A2 EP0534168A2 (en) 1993-03-31
EP0534168A3 EP0534168A3 (en) 1993-06-09
EP0534168B1 true EP0534168B1 (en) 1995-01-18

Family

ID=6441168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92114817A Expired - Lifetime EP0534168B1 (en) 1991-09-21 1992-08-29 Motor vehicle headlamp

Country Status (3)

Country Link
EP (1) EP0534168B1 (en)
DE (2) DE4131483A1 (en)
ES (1) ES2067987T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843986B4 (en) 1998-09-25 2012-02-23 Automotive Lighting Reutlingen Gmbh Headlights for vehicles
DE102020130859A1 (en) 2020-11-23 2022-05-25 Marelli Automotive Lighting Reutlingen (Germany) GmbH Motor vehicle lighting device with a reflector and method for designing a reflecting surface of a reflector of such a motor vehicle lighting device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2584697A (en) * 1950-08-19 1952-02-05 Roland E Gunther Light projection apparatus
DE3525041C2 (en) * 1985-07-13 1994-06-16 Bosch Gmbh Robert Low beam or fog lights for motor vehicles
DE3731232A1 (en) * 1987-09-17 1989-03-30 Bosch Gmbh Robert HEADLIGHTS FOR VEHICLES, IN PARTICULAR HEADLIGHTS FOR MOTOR VEHICLES
US4799131A (en) * 1987-11-18 1989-01-17 Minnesota Mining And Manufacturing Company Automotive lighting element

Also Published As

Publication number Publication date
ES2067987T3 (en) 1995-04-01
EP0534168A2 (en) 1993-03-31
EP0534168A3 (en) 1993-06-09
DE4131483A1 (en) 1993-03-25
DE59201227D1 (en) 1995-03-02

Similar Documents

Publication Publication Date Title
DE3525041C2 (en) Low beam or fog lights for motor vehicles
DE19704467B4 (en) Vehicle headlights
EP0890785B1 (en) Vehicle headlights
DE4315393C2 (en) Motor vehicle headlights with a reflector and a lens
DE69713199T2 (en) Automotive headlamp
DE10033725A1 (en) Headlights for a vehicle
DE19814479A1 (en) Headlamp for cars according to projection principle
DE3731232A1 (en) HEADLIGHTS FOR VEHICLES, IN PARTICULAR HEADLIGHTS FOR MOTOR VEHICLES
DE68917555T2 (en) Motor vehicle headlights.
DE3239754C2 (en)
EP0517878B1 (en) Headlamp for motor vehicles
DE4123658A1 (en) HEADLIGHTS FOR MOTOR VEHICLES
DE4112194C2 (en) Motor vehicle headlight unit
DE29912504U1 (en) Headlights for vehicles
EP0534168B1 (en) Motor vehicle headlamp
DE4238274A1 (en) Combined twin headlight and foglamp assembly for motor vehicle - has single one-piece reflector of metal or plastic contoured to project independent beams from three separate lightsources.
DE6920060U (en) LIGHT, ESPECIALLY REAR OR SAFETY LIGHT
DE19946351A1 (en) Headlamp for motor vehicles has openings in pot-shaped region of stop via which light reflected from reflector area and directed towards pot-shaped region can enter pot-shaped region
DE4020081A1 (en) VEHICLE LIGHT
DE3841518A1 (en) MIRROR LAMP
DE4025393C1 (en)
DE3415617C2 (en) Headlights for motor vehicles with a steeply inclined cover plate and a partly parabolic, partly elliptical reflector
EP0558949A2 (en) Dipping headlamp for vehicles
DE19833475C2 (en) Reflector as part of a motor vehicle headlight
DE19745467A1 (en) Headlamp for use on motor vehicle

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES FR IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR IT

17P Request for examination filed

Effective date: 19931118

17Q First examination report despatched

Effective date: 19940630

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR IT

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59201227

Country of ref document: DE

Date of ref document: 19950302

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2067987

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050829

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20080828

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20080818

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20081023

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100302

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090831

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20090831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090830