EP0624753A2 - Projecteur pour véhicules - Google Patents

Projecteur pour véhicules Download PDF

Info

Publication number
EP0624753A2
EP0624753A2 EP94105663A EP94105663A EP0624753A2 EP 0624753 A2 EP0624753 A2 EP 0624753A2 EP 94105663 A EP94105663 A EP 94105663A EP 94105663 A EP94105663 A EP 94105663A EP 0624753 A2 EP0624753 A2 EP 0624753A2
Authority
EP
European Patent Office
Prior art keywords
light
lens
reflector
diaphragm
reflection element
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
EP94105663A
Other languages
German (de)
English (en)
Other versions
EP0624753A3 (fr
EP0624753B1 (fr
Inventor
Freider Dipl.-Ing. Alber
Martin Dipl.-Ing. Lampen (Fh)
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 EP0624753A2 publication Critical patent/EP0624753A2/fr
Publication of EP0624753A3 publication Critical patent/EP0624753A3/fr
Application granted granted Critical
Publication of EP0624753B1 publication Critical patent/EP0624753B1/fr
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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/18—Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs

Definitions

  • the invention relates to a headlamp for vehicles according to the preamble of claim 1.
  • Such a headlight is known from DE 33 40 796 A1.
  • This headlight has a reflector in which a light source is inserted.
  • a lens is arranged in the light exit direction from the reflector and a diaphragm is arranged in the beam path between the reflector and the lens and has a diaphragm edge which is imaged by the lens.
  • the light beam emitted by the headlight illuminates the area in front of the vehicle and is limited at the top by a light-dark boundary formed by the edge of the panel.
  • the light-dark limit is sharply defined and above this the area in front of the vehicle is only very weakly illuminated, so that dazzling oncoming vehicle drivers is reliably avoided.
  • the headlamp according to the invention with the features of claim 1 has the advantage that the illumination of the area in front of the vehicle above the light / dark boundary is improved by the at least one reflection element.
  • the illuminance and the illuminance distribution can be influenced in a targeted manner by the size and shape of the reflection element.
  • FIG. 1 shows a headlamp in a longitudinal section with a measuring screen arranged in front of it
  • FIG. 2 shows the measuring screen with an illuminance distribution generated by the headlamp thereon.
  • a headlight for vehicles serves as a low-beam headlight and has a reflector 10, in the apex region of which a light source 12 is inserted, which can be an incandescent lamp or a gas discharge lamp.
  • a lens 16 is arranged in the light exit direction 14, that is to say in the direction of the light beams reflected by the reflector 10, and in the beam path between the reflector 10 and the lens 16 an aperture 18 is arranged.
  • the aperture 18 extends below the optical axis 20 of the reflector 10 and has an upper edge 22 which is arranged approximately at the height of the optical axis 20.
  • the reflector 10 is ellipsoidal and contains different ellipses in axial longitudinal sections, that is to say containing the optical axis 20. These ellipses all have a common inner focal point F1 in the area of which the light source 12 is arranged. In the vertical axial longitudinal section shown in FIG. 1, an ellipse results, the outer focal point F2v of which is in the area of the diaphragm 18. In the horizontal axial longitudinal section there is an ellipse, the outer focal point F2h of which lies in the region of the lens 16.
  • the lens 16 has a flat surface 24 facing the reflector 10 and a convexly curved surface 26 facing away from it.
  • the convexly curved surface 26 can be spherical or aspherical, depending on which imaging properties are necessary for the lens 16.
  • the aperture 18 shields the light reflected upward from the reflector 10 with respect to the optical axis 20.
  • the lens 16 forms the upper edge 22 of the diaphragm 18, which forms a light-dark boundary in the illuminance distribution generated by the headlight on a measuring screen 28 arranged vertically in front of it.
  • the shape of the upper edge 22 of the diaphragm 18 thus determines the course of the Corposcuro limit of the illuminance distribution, but it must be taken into account that the diaphragm edge 22 is imaged by the lens 16 in the wrong direction.
  • FIG. 2 shows the measuring screen 28 arranged vertically in front of the headlight with the hatched area 30 illuminated by the headlight on it with high illuminance.
  • the measuring screen 28 represents an area in front of the vehicle with a roadway and is used to check the headlights generated illuminance distribution under standard conditions.
  • a horizontal center plane HH and a vertical center plane VV are drawn on the measuring screen 28, which intersect at the point HV, through which a horizontal connecting line between the headlight and the measuring screen 28 also passes.
  • the area 30 is limited at the top by the Patoscuro boundary, which has a horizontal section 32 on the oncoming traffic side, that is to say in the headlamp designed for right-hand traffic of the exemplary embodiment of the left-hand side in FIG.
  • the horizontal section 32 is arranged approximately 1 percent below the horizontal center plane HH of the measuring screen 28, this angle specification relating to the headlight as the fulcrum.
  • the course of the Cadoscuro boundary is generally based on legal regulations, the Cadoscuro limit explained above with the horizontal section 32 and the inclined section 34 being sufficient in existing legal regulations in Europe.
  • the Corposcuro border has the horizontal section 32 on the oncoming traffic side and a horizontal section 36 which is also arranged higher than this on its own traffic side, as shown in broken lines in FIG. 2.
  • the minimum illuminance is required by law at a large number of measuring points.
  • At least one reflection element 38 is arranged in the beam path of the light between the diaphragm 18 and the lens 16, by means of which light reflected by the reflector 10 and incident thereon is reflected inclined upward with respect to the optical axis 20, so that it passes through the lens 16 illuminates the measuring screen 28 above the Patoscuro limit 32.34 or 32.36.
  • only one reflection element 38 is shown, which is designed as a flat mirror and is close the optical axis 20 is arranged somewhat below this.
  • the reflection element 38 strikes light rays 40 reflected from a region of the reflector 10 arranged somewhat above the optical axis 20 and extending with a slight inclination to the optical axis 20.
  • the vertical extent of the reflection element 38 is small compared to the diaphragm 18, so that one further The region of the reflector 10 lying above the optical axis 20 is reflected and light rays 42 which are inclined more downward with respect to the optical axis 20 are not influenced by the reflection element 38.
  • the reflection element 38 can, as shown in FIG. 1, be held on the aperture 18, for example by means of rivets, or, as shown in broken lines in FIG. 1, on a support 44 holding the lens 16.
  • the reflection element 38 can also be integral with the aperture 18 or the Carrier 44 are executed.
  • the size of the reflection element 38 depends on the illuminance with which the measuring screen 28 is to be illuminated above the light-dark boundary.
  • the reflection surface of the reflection element 38 can also be designed to be convex or concave, in a departure from the illustration, and generally depends on the illuminance distribution to be achieved in the region above the light-dark boundary. In addition, light can be reflected horizontally scattered by the reflection element 38.
  • the reflection element 38 is designed in such a way that the light reflected by it complies with legal regulations regarding the required minimum illuminance values and the maximum permissible illuminance values above the light-dark limit.
  • the ECE control 20 contains, for example, a measuring point B50L in which the illuminance may be a maximum of 0.4 lux. Taking into account the legal regulations, the illuminance distribution above the light-dark limit can be chosen freely will.
  • the illuminance distribution can be chosen, for example, such that a region 46 of the measuring screen 28 lying directly above the light-dark boundary, which extends to approximately 2 degrees above the horizontal central plane HH and below approximately 4 degrees on both sides of the vertical central plane VV of the measuring screen 28, through which the Reflection element 38 reflected light is only weakly illuminated. This avoids dazzling oncoming vehicle drivers or at least keeps them low.
  • a region 48 which adjoins the region 46 upwards and laterally and vertically upwards to approximately 4 degrees to the horizontal center plane HH and on both sides to approximately 8 degrees of the vertical center plane VV of the measuring screen 28 region 48 is stronger than by the light reflected by the reflection element 38 the area 46 is illuminated.
  • the illuminance distribution in areas 46 and 48 is based on legal regulations. By illuminating areas 46 and 48, the vehicle driver can perceive the traffic situation there, that is, objects located there, such as high-placed traffic signs or other road users, can be recognized.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP94105663A 1993-05-08 1994-04-13 Projecteur pour véhicules Expired - Lifetime EP0624753B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4315401A DE4315401A1 (de) 1993-05-08 1993-05-08 Scheinwerfer für Fahrzeuge
DE4315401 1993-05-08

Publications (3)

Publication Number Publication Date
EP0624753A2 true EP0624753A2 (fr) 1994-11-17
EP0624753A3 EP0624753A3 (fr) 1995-03-01
EP0624753B1 EP0624753B1 (fr) 1998-03-25

Family

ID=6487605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94105663A Expired - Lifetime EP0624753B1 (fr) 1993-05-08 1994-04-13 Projecteur pour véhicules

Country Status (2)

Country Link
EP (1) EP0624753B1 (fr)
DE (2) DE4315401A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2796705A1 (fr) * 1999-07-19 2001-01-26 Koito Mfg Co Ltd Phare pour vehicule
EP1260758A1 (fr) * 2001-05-25 2002-11-27 Valeo Vision Projecteur d'éclairage de véhicule automobile
FR2888916A1 (fr) * 2005-07-21 2007-01-26 Valeo Vision Sa Module optique pour dispositif d'eclairage automobile
FR2895782A1 (fr) * 2006-01-05 2007-07-06 Valeo Vision Sa Dispositif projecteur elliptique multifonctions avec element optique additionnel
US7387413B2 (en) * 2003-07-23 2008-06-17 Schott Ag Lighting apparatus, lens and method of making the lens
DE102013207850A1 (de) 2013-04-29 2014-10-30 Automotive Lighting Reutlingen Gmbh Lichtmodul für einen Kraftfahrzeugscheinwerfer

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2769688B1 (fr) * 1997-10-14 2000-03-10 Valeo Vision Projecteur elliptique a coupure attenuee
FR2770617B1 (fr) * 1997-10-30 2000-02-04 Valeo Vision Projecteur elliptique pour vehicule automobile dont le faisceau lumineux presente une coupure attenuee
FR2788585B1 (fr) * 1999-01-18 2001-04-27 Valeo Vision Projecteur du type elliptique, notamment pour vehicule automobile
DE10004699B4 (de) * 2000-02-03 2014-05-28 Automotive Lighting Reutlingen Gmbh Fahrzeugscheinwerfer nach dem Projektionsprinzip
JP4749968B2 (ja) 2006-07-31 2011-08-17 株式会社小糸製作所 車両用前照灯
DE102009035743A1 (de) 2009-08-01 2011-02-17 Automotive Lighting Reutlingen Gmbh Lichtmodul für einen Kraftfahrzeugscheinwerfer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2620984A1 (fr) * 1987-09-29 1989-03-31 Koito Mfg Co Ltd Phare du type projecteur pour automobile
DE9000395U1 (fr) * 1990-01-16 1991-05-16 Robert Bosch Gmbh, 7000 Stuttgart, De
GB2253046A (en) * 1991-02-08 1992-08-26 Koito Mfg Co Ltd Projection-type vehicle headlamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2620984A1 (fr) * 1987-09-29 1989-03-31 Koito Mfg Co Ltd Phare du type projecteur pour automobile
DE9000395U1 (fr) * 1990-01-16 1991-05-16 Robert Bosch Gmbh, 7000 Stuttgart, De
GB2253046A (en) * 1991-02-08 1992-08-26 Koito Mfg Co Ltd Projection-type vehicle headlamp

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2352802A (en) * 1999-07-19 2001-02-07 Koito Mfg Co Ltd Vehicle headlamp which illuminates overhead signs
GB2352802B (en) * 1999-07-19 2001-09-26 Koito Mfg Co Ltd Headlamp for vehicle
US6494603B1 (en) 1999-07-19 2002-12-17 Koito Manufacturing Co., Ltd. Headlamp for a vehicle
FR2796705A1 (fr) * 1999-07-19 2001-01-26 Koito Mfg Co Ltd Phare pour vehicule
DE10035130B4 (de) * 1999-07-19 2008-09-18 Koito Manufacturing Co., Ltd. Fahrzeugscheinwerfer
EP1260758A1 (fr) * 2001-05-25 2002-11-27 Valeo Vision Projecteur d'éclairage de véhicule automobile
FR2825138A1 (fr) * 2001-05-25 2002-11-29 Valeo Vision Projecteur d'eclairage de vehicule automobile
US7387413B2 (en) * 2003-07-23 2008-06-17 Schott Ag Lighting apparatus, lens and method of making the lens
US7722233B2 (en) 2005-07-21 2010-05-25 Valeo Vision Optical module for a motor vehicle lighting device
EP1746340A3 (fr) * 2005-07-21 2007-11-07 Valeo Vision Module optique pour dispositif d'éclairage automobile
FR2888916A1 (fr) * 2005-07-21 2007-01-26 Valeo Vision Sa Module optique pour dispositif d'eclairage automobile
EP1806531A1 (fr) * 2006-01-05 2007-07-11 Valeo Vision Dispositif projecteur elliptique multifonctions avec élément optique additionnel
FR2895782A1 (fr) * 2006-01-05 2007-07-06 Valeo Vision Sa Dispositif projecteur elliptique multifonctions avec element optique additionnel
DE102013207850A1 (de) 2013-04-29 2014-10-30 Automotive Lighting Reutlingen Gmbh Lichtmodul für einen Kraftfahrzeugscheinwerfer
EP2799761A2 (fr) 2013-04-29 2014-11-05 Automotive Lighting Reutlingen GmbH Module d'éclairage de phare de véhicule automobile
US9249943B2 (en) 2013-04-29 2016-02-02 Automotive Lighting Reutlingen Gmbh Light module for a motor vehicle headlamp

Also Published As

Publication number Publication date
DE4315401A1 (de) 1994-11-10
EP0624753A3 (fr) 1995-03-01
DE59405501D1 (de) 1998-04-30
EP0624753B1 (fr) 1998-03-25

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