EP0151794A2 - Projector, particularly motor vehicle headlamp - Google Patents

Projector, particularly motor vehicle headlamp Download PDF

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Publication number
EP0151794A2
EP0151794A2 EP84116230A EP84116230A EP0151794A2 EP 0151794 A2 EP0151794 A2 EP 0151794A2 EP 84116230 A EP84116230 A EP 84116230A EP 84116230 A EP84116230 A EP 84116230A EP 0151794 A2 EP0151794 A2 EP 0151794A2
Authority
EP
European Patent Office
Prior art keywords
reflector
sector
headlight according
central section
additional
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
EP84116230A
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German (de)
French (fr)
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EP0151794B1 (en
EP0151794A3 (en
Inventor
Gerhard Dipl.-Ing. Lindae
Peter Ing. Perthus
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0151794A2 publication Critical patent/EP0151794A2/en
Publication of EP0151794A3 publication Critical patent/EP0151794A3/en
Application granted granted Critical
Publication of EP0151794B1 publication Critical patent/EP0151794B1/en
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
    • F21S41/30—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

Definitions

  • the invention relates to a headlamp, in particular a main headlamp for motor vehicles according to the preamble of claim 1.
  • a headlamp for example known from DE-OS 31 39 943.
  • the partial light beam illuminating the near area of the road is raised and simultaneously fanned out to the side.
  • the entire roadway is illuminated more intensively, particularly in the vicinity.
  • the above-described measure does not achieve the desired, intensive illumination of the road, both the illumination of the long-range area and of the area immediately below the light-dark limit.
  • the additional sector according to the invention has an optical geometry of this type and is arranged with respect to the reflector in such a way that a partial light beam that is fanned out laterally and raised in the vertical direction is produced with sufficient illumination of the near area of the road.
  • FIG. 1 shows the interior view of a rectangular headlight with several sectors of different configurations in a reduced view
  • FIG. 2 shows an additional sector, which is produced separately with respect to the reflector, in a spatial, enlarged view
  • FIG. 3 the partial light beam (raw light) of the reflector in FIG. 1 projected onto a measuring screen with a light source for the asymmetrical low beam.
  • FIG. 1 shows the interior view of a headlight for motor vehicles which produces the common high and low beam, only schematically Rectangular reflector 10 with an upper and lower boundary surface 8, 9 and an apex opening 14 into which an incandescent lamp (not shown) with a high-beam filament and a low-beam filament can be inserted.
  • the optically effective reflection surface of the reflector 10 is formed by a long-range sector 31 and two short-range sectors 12 and an additional sector 13. This is arranged symmetrically with respect to the vertical center plane 18, which intersects with the horizontal center plane 17 in the optical axis 15 of the reflector 10.
  • the boundary edges 6 and 7 of the sectors 11 to 13 point to the optical axis 15.
  • the additional sector 13 in FIG. 2 is a concave surface part of a non-rotating hollow body, which in a first embodiment is a paraboloid ellipsoid.
  • a horizontal central section 19 through the paraboloid ellipsoid results in an ellipse 19 'with a first semi-axis 19 "and a second second axis coaxial with the optical axis 15.
  • the vertical central section 20 through the non-rotating hollow body is a parabola 20'.
  • the additional sector 13 has a concave reflection surface 2J, the size and configuration of which depend on the parameters of the respective headlight.
  • the additional sector 13 on the other hand, produces a partial light beam 13 'which illuminates the roadway over the entire width on the one hand and the other half of the roadway in the close range on the other hand.
  • the additional sector is a concave surface part of a polyellipsoid, the horizontal central section of which is an ellipse, the large semiaxis of which is shorter than the large semiaxis of the ellipse of the vertical central section.
  • the concave surface part forming the additional sector belongs to a hollow body, the horizontal center section and vertical center section (main sections) of which are a higher-order conic section-like curve.
  • the additional sector is formed by two sector halves which meet in the vertical central plane and whose common abutting edge is either a ridge line 22 pointing away from the optical axis of the reflector or a valley line 23 pointing towards the optical axis (FIG. 2).

Abstract

1. Projector, particularly motor vehicle headlamp with a reflector having a light source, which has a far-zone sector and, in the upper reflector half, a near-zone sector, characterized in that there is arranged in the upper half of the reflector (10) and in the zone of the vertical centre plane (18) at least one auxiliary sector (13), which is a concave subarea of a non-rotation-symmetric hollow body, and produces a laterally spread-out component light bundle (13') raised in the vertical direction, which is situated below the low-beam cut-off (22), and illuminates the roadway over the entire width as well as its own half of the roadway in the near zone.

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Scheinwerfer, insbesondere einen Hauptscheinwerfer für Kraftfahrzeuge nach der Gattung des Anspruchs 1. Bei einem derartigen, beispielsweise aus der DE-OS 31 39 943 bekannten Scheinwerfer . wird das den Nahbereich der Fahrbahn ausleuchtende Teillichtbündel angehoben und gleichzeitig zur Seite aufgefächert. Hierdurch erreicht man eine intensivere Ausleuchtung der gesamten Fahrbahn, insbesondere im Nahbereich.The invention relates to a headlamp, in particular a main headlamp for motor vehicles according to the preamble of claim 1. In such a headlamp, for example known from DE-OS 31 39 943. the partial light beam illuminating the near area of the road is raised and simultaneously fanned out to the side. As a result, the entire roadway is illuminated more intensively, particularly in the vicinity.

Bei Scheinwerfern mit einer verhältnismäßig breiten und niedrigen Lichtaustrittsöffnung erzielt man mit der vorbeschriebenen Maßnahme nicht die gewünschte, intensive Ausleuchtung der Fahrbahn, und zwar sowohl die Ausleuchtung des Fernbereiches--als auch des Bereiches unmittelbar unterhalb der Helldunkelgrenze.In the case of headlights with a relatively wide and low light exit opening, the above-described measure does not achieve the desired, intensive illumination of the road, both the illumination of the long-range area and of the area immediately below the light-dark limit.

Vorteile der ErfindungAdvantages of the invention

Mit dem Scheinwerfer, insbesondere dem Hauptscheinwerfer für Kraftfahrzeuge nach der Erfindung wird das im Stand der Technik dargelegte Problem mit technisch einfachen Mitteln im wesentlichen gelöst. Der erfindungsgemäße Zusatzsektor hat eine derart optische Geometrie und ist bezüglich dem Reflektor derart angeordnet, daß ein stark seitlich aufgefächertes und in vertikaler Richtung angehobenes Teillichtbündel entsteht bei noch ausreichender Ausleuchtung des Nahbereichs der Fahrbahn.With the headlamp, in particular the main headlamp for motor vehicles according to the invention, the problem set out in the prior art is essentially solved with technically simple means. The additional sector according to the invention has an optical geometry of this type and is arranged with respect to the reflector in such a way that a partial light beam that is fanned out laterally and raised in the vertical direction is produced with sufficient illumination of the near area of the road.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben.Advantageous developments of the invention are described in the subclaims.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in nachfolgender Figurenbeschreibung näher erläutert. Es zeigen: Figur 1 die Innenansicht eines Rechteckscheinwerfers mit mehreren Sektoren unterschiedlicher Konfiguration in verkleinerter Darstellungä Figur 2 einen bezüglich dem Reflektor getrennt hergestellter Zusatzsektor in raumbildlicher, vergrößerter Darstellung; und Figur 3 die auf einen Meßschirm projizierten Teillichtbündel (Rohlicht) des Reflektors in Figur 1 mit einer Lichtquelle für das asymmetrische Abblendlicht.An embodiment of the invention is shown in the drawing and explained in more detail in the following description of the figures. FIG. 1 shows the interior view of a rectangular headlight with several sectors of different configurations in a reduced view; FIG. 2 shows an additional sector, which is produced separately with respect to the reflector, in a spatial, enlarged view; and FIG. 3 the partial light beam (raw light) of the reflector in FIG. 1 projected onto a measuring screen with a light source for the asymmetrical low beam.

Beschreibung des AusführungsbeispielesDescription of the embodiment

Von einem das gemeinsame Fern- und Abblendlicht erzeugenden Hauptscheinwerfer für Kraftfahrzeuge zeigt Figur 1 die Innenansicht eines nur schematisch dargestellten Rechteckreflektors 10 mit einer oberen und unteren Begrenzungsfläche 8, 9 sowie einer Scheitelöffnung 14, in die eine nicht dargestellte Glühlampe mit einer Fernlichtwendel und einer Abblendlichtwendel einsetzbar ist. Die lichttechnisch wirksame Reflexionsfläche des Reflektors 10 bilden ein Fernbereichsektor 31 und zwei Nahbereichsektoren 12 sowie ein Zusatzsektor 13. Dieser ist bezüglich der vertikalen Mittelebene 18 symmetrisch angeordnet, die sich mit der horizontalen Mittelebene 17 in der optischen Achse 15 des Reflektors 10 schneidet. Die Begrenzungskanten 6 und 7 der Sektoren 11 bis 13 weisen zur optischen Achse 15.FIG. 1 shows the interior view of a headlight for motor vehicles which produces the common high and low beam, only schematically Rectangular reflector 10 with an upper and lower boundary surface 8, 9 and an apex opening 14 into which an incandescent lamp (not shown) with a high-beam filament and a low-beam filament can be inserted. The optically effective reflection surface of the reflector 10 is formed by a long-range sector 31 and two short-range sectors 12 and an additional sector 13. This is arranged symmetrically with respect to the vertical center plane 18, which intersects with the horizontal center plane 17 in the optical axis 15 of the reflector 10. The boundary edges 6 and 7 of the sectors 11 to 13 point to the optical axis 15.

Der Zusatzsektor 13 in Figur 2 ist konkaves Flächenteil eines Nichtrotations-Hohlkörpers, der in einer ersten Ausführung ein Paraboloid-Ellipsoid ist. Ein horizontaler Mittelschnitt 19 durch das Paraboloid-Ellipsoid ergibt eine Ellipse 19' mit einer ersten Halbachse 19" und einer zweiten zur optischen Achse 15 koaxialen zweiten Achse. Der vertikale Mittelschnitt 20 durch den Nichtrotations-Hohlkörper ist eine Parabel 20'. Der Zusatzsektor 13 hat eine konkave Reflexionsfläche 2J, deren Größe und Konfiguration von den Parametern des jeweiligen Scheinwerfers abhängen.The additional sector 13 in FIG. 2 is a concave surface part of a non-rotating hollow body, which in a first embodiment is a paraboloid ellipsoid. A horizontal central section 19 through the paraboloid ellipsoid results in an ellipse 19 'with a first semi-axis 19 "and a second second axis coaxial with the optical axis 15. The vertical central section 20 through the non-rotating hollow body is a parabola 20'. The additional sector 13 has a concave reflection surface 2J, the size and configuration of which depend on the parameters of the respective headlight.

Der Reflektor 10 erzeugt auf einem Meßschirm gemäß Figur 3 folgende Rohlichtverteilung:

  • Der Fernbereichsektor 11 erzeugt zwei lichtstarke, weitreichende Teillichtbündel 11' nahe der Vertikalmittelebene 18 und unmittelbar unterhalb einer Helldunkelgrenze 22, die das Abblendlichtbündel nach oben hin begrenzt. Die beiden Nahbereichsektoren 12 des Reflektors 10 erzeugen zwei die Fahrbahn vor dem Kraftfahrzeug ausleuchtende Teillichtbündel 12'.
The reflector 10 produces the following raw light distribution on a measuring screen according to FIG. 3:
  • The far-range sector 11 generates two light-intensive, far-reaching partial light beams 11 'near the vertical center plane 18 and immediately below a chiaroscuro boundary 22 which limits the low beam at the top. The two short-range sectors 12 of the reflector 10 generate two partial light beams 12 'illuminating the road ahead of the motor vehicle.

Der erfindungsgemäße Zusatzsektor 13 hingegen erzeugt ein Teillichtbündel 13', das die Fahrbahn zum einen über die gesamte Breite und zum andern die eigene Fahrbahnhälfte im Nahbereich ausleuchtet.The additional sector 13 according to the invention, on the other hand, produces a partial light beam 13 'which illuminates the roadway over the entire width on the one hand and the other half of the roadway in the close range on the other hand.

In einer Alternative ist der Zusatzsektor konkaver Flächenteil eines Polyellipsoides, dessen Horizontalmittelschnitt eine Ellipse ist, deren große Halbachse kürzer ist als die große Halbachse der Ellipse des Vertikalmittelschnittes. In einer zweiten Alternative gehört das konkave, den Zusatzsektor bildende Flächenteil zu einem Hohlkörper, dessen Horizontalmittelschnitt und Vertikalmittelschnitt (Hauptschnitte) kegelschnittähnliche Kurve höherer Ordnung sind.In an alternative, the additional sector is a concave surface part of a polyellipsoid, the horizontal central section of which is an ellipse, the large semiaxis of which is shorter than the large semiaxis of the ellipse of the vertical central section. In a second alternative, the concave surface part forming the additional sector belongs to a hollow body, the horizontal center section and vertical center section (main sections) of which are a higher-order conic section-like curve.

In einer anderen Alternative bilden den Zusatzsektor zwei Sektorhälften, die sich in der vertikalen Mittelebene stoßen und deren gemeinsame Stoßkante entweder eine von der optischen Achse des Reflektors wegweisende Kammlinie 22 oder eine zur optischen Achse weisende Tallinie 23 ist (Figur 2).In another alternative, the additional sector is formed by two sector halves which meet in the vertical central plane and whose common abutting edge is either a ridge line 22 pointing away from the optical axis of the reflector or a valley line 23 pointing towards the optical axis (FIG. 2).

Claims (10)

1. Scheinwerfer, insbesondere Hauptscheinwerfer für Kraftfahrzeuge mit einem eine Lichtquelle aufweisenden Reflektor, der einen Fernbereichsektor und in der oberen Reflektorhälfte einen Nahbereichsektor aufweist, dadurch gekennzeichnet, daß in der oberen Hälfte des Reflektors (10) und im Bereich der Vertikalmittelebene (18) mindestens ein Zusatzreflektor (13) angeordnet ist, der ein konkaves Flächenteil eines Nichtrotations-Hohlkörpers ist.1. Headlights, in particular main headlights for motor vehicles with a reflector having a light source, which has a far-range sector and a short-range sector in the upper reflector half, characterized in that at least one in the upper half of the reflector (10) and in the region of the vertical center plane (18) Additional reflector (13) is arranged, which is a concave surface part of a non-rotating hollow body. 2. Scheinwerfer nach Anspruch J, dadurch gekennzeichnet, daß der Nichtrotations-Hohlkörper ein Paraboloid-Ellipsoid ist, dessen Horizontalmittelschnitt (19) eine Ellise (19') und dessen Vertikalmittelschnitt (20) eine Parabel (20') ist.2. Headlight according to claim J, characterized in that the non-rotating hollow body is a paraboloid ellipsoid, the horizontal central section (19) of an ellipse (19 ') and the vertical central section (20) of a parabola (20'). 3. Scheinwerfer nach Anspruch J, dadurch gekennzeichnet, daß der Nichtrotations-Hohlkörper ein Polyellipsoid ist, dessen Horizontalmittelschnitt eine Ellipse ist, deren große Halbachse kürzer ist als die große Halbachse der Ellipse des Vertikalmittelschnittes.3. Headlight according to claim J, characterized in that the non-rotating hollow body is a polyellipsoid, the horizontal central section of which is an ellipse, the large semiaxis of which is shorter than the large semiaxis of the ellipse of the vertical central section. 4. Scheinwerfer nach Anspruch 1, dadurch gekennzeichnet, daß der Horizontalmittelschnitt und der Vertikalmittelschnitt des Nichtrotations-Hohlkörpers sind kegelschnittähnliche Kurve höherer Ordnung ist.4. Headlight according to claim 1, characterized in that the horizontal central section and the vertical central section of the non-rotating hollow body are conic section-like curve of a higher order. 5. Scheinwerfer nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß der Zusatzsektor (13) bezüglich der Vertikalmittelebene (J8) symmetrisch angeordnet ist.5. Headlight according to one of the preceding claims, characterized in that the additional sector (13) is arranged symmetrically with respect to the vertical center plane (J8). 6. Scheinwerfer nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß der Zusatzsektor (13) bezüglich dem Reflektor (10) ein getrennt hergestelltes Bauelement ist.6. Headlight according to one of the preceding claims, characterized in that the additional sector (13) with respect to the reflector (10) is a separately manufactured component. 7. Scheinwerfer nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß mehrere Zusatzsektoren in der oberen Hälfte des Reflektors (13) und im Bereich der Vertikalmittelebene (18) angeordnet sind.7. Headlight according to one of the preceding claims, characterized in that several additional sectors are arranged in the upper half of the reflector (13) and in the region of the vertical center plane (18). 8. Scheinwerfer nach Anspruch 7, dadurch gekennzeichnet, daß die Achse eines jeden Zusatzsektors (13) identisch ist mit der optischen Achse (15) des Reflektors (10).8. Headlamp according to claim 7, characterized in that the axis of each additional sector (13) is identical to the optical axis (15) of the reflector (10). 9. Scheinwerfer nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Achse eines jeden Zusatzsektors bezüglich der optischen Achse (15) des Reflektors (10) in vertikaler Richtung geneigt ist.9. Headlight according to one of claims 1 to 7, characterized in that the axis of each additional sector with respect to the optical axis (15) of the reflector (10) is inclined in the vertical direction. 10. Scheinwerfer nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß den Zusatzsektor zwei Sektorenhälften bilden, daß sich die beiden Sektorenhälften in der Vertikalmittelebene (18) stoßen und daß deren gemeinsame Stoßkante entweder eine von der optischen Achse (15) des Reflektors (10) wegweisende Kammlinie (24) oder eine zur optischen Achse (J5) weisende Tallinie (23) ist.10. Headlight according to one of the preceding claims, characterized in that the additional sector form two sector halves, that the two sector halves meet in the vertical central plane (18) and that their common abutting edge either one of the optical axis (15) of the reflector (10) groundbreaking ridge line (24) or a valley line (23) pointing to the optical axis (J5).
EP84116230A 1984-02-16 1984-12-22 Projector, particularly motor vehicle headlamp Expired - Lifetime EP0151794B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3405504 1984-02-16
DE19843405504 DE3405504A1 (en) 1984-02-16 1984-02-16 HEADLIGHTS, IN PARTICULAR HEADLIGHTS FOR MOTOR VEHICLES

Publications (3)

Publication Number Publication Date
EP0151794A2 true EP0151794A2 (en) 1985-08-21
EP0151794A3 EP0151794A3 (en) 1987-07-22
EP0151794B1 EP0151794B1 (en) 1990-06-13

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EP84116230A Expired - Lifetime EP0151794B1 (en) 1984-02-16 1984-12-22 Projector, particularly motor vehicle headlamp

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EP (1) EP0151794B1 (en)
JP (1) JPS60193201A (en)
DE (2) DE3405504A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2602855A1 (en) * 1986-08-14 1988-02-19 Bosch Gmbh Robert Dipped vehicle headlight having reflector
EP0346854A2 (en) * 1988-06-14 1989-12-20 Ichikoh Industries Limited Projector-type head lamp for vehicles

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63284702A (en) * 1987-05-15 1988-11-22 スタンレー電気株式会社 Reflector of head lamp
JPH04319281A (en) * 1991-04-18 1992-11-10 Fujitsu Ltd Method for bonding stud and jig therefor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142322B (en) * 1960-04-20 1963-01-17 Pierre Cibie Long-range headlights with strong close-range lighting
EP0012836A1 (en) * 1978-12-28 1980-07-09 Westfälische Metall Industrie KG Hueck & Co. Anti-dazzle headlight for vehicles
EP0075786A1 (en) * 1981-09-29 1983-04-06 Robert Bosch Gmbh Projector, particularly a vehicle headlamp

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5868801A (en) * 1981-09-29 1983-04-23 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Head lamp
DE3379800D1 (en) * 1982-10-15 1989-06-08 Carello Lighting Plc Road vehicle headlamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142322B (en) * 1960-04-20 1963-01-17 Pierre Cibie Long-range headlights with strong close-range lighting
EP0012836A1 (en) * 1978-12-28 1980-07-09 Westfälische Metall Industrie KG Hueck & Co. Anti-dazzle headlight for vehicles
EP0075786A1 (en) * 1981-09-29 1983-04-06 Robert Bosch Gmbh Projector, particularly a vehicle headlamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2602855A1 (en) * 1986-08-14 1988-02-19 Bosch Gmbh Robert Dipped vehicle headlight having reflector
EP0346854A2 (en) * 1988-06-14 1989-12-20 Ichikoh Industries Limited Projector-type head lamp for vehicles
EP0346854A3 (en) * 1988-06-14 1990-06-20 Ichikoh Industries Limited Projector-type head lamp for vehicles

Also Published As

Publication number Publication date
DE3482485D1 (en) 1990-07-19
EP0151794B1 (en) 1990-06-13
EP0151794A3 (en) 1987-07-22
JPS60193201A (en) 1985-10-01
DE3405504A1 (en) 1985-08-29
DE3405504C2 (en) 1992-10-08

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