EP1069374A1 - Adaptiver Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, zentralen Blende - Google Patents

Adaptiver Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, zentralen Blende Download PDF

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Publication number
EP1069374A1
EP1069374A1 EP99830455A EP99830455A EP1069374A1 EP 1069374 A1 EP1069374 A1 EP 1069374A1 EP 99830455 A EP99830455 A EP 99830455A EP 99830455 A EP99830455 A EP 99830455A EP 1069374 A1 EP1069374 A1 EP 1069374A1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
head
motor
reflector
lamp
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
EP99830455A
Other languages
English (en)
French (fr)
Other versions
EP1069374B1 (de
Inventor
Piero Perlo
Claudia Bigliati
Sabino Sinesi
Bartolomeo Pairetti
Gianfranco Innocenti
Giorgio Manassero
Reiner Neumann
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.)
Marelli Automotive Lighting Italy SpA
Original Assignee
Automotive Lighting Italia SpA
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 Automotive Lighting Italia SpA filed Critical Automotive Lighting Italia SpA
Priority to EP99830455A priority Critical patent/EP1069374B1/de
Priority to DE69927006T priority patent/DE69927006T2/de
Publication of EP1069374A1 publication Critical patent/EP1069374A1/de
Application granted granted Critical
Publication of EP1069374B1 publication Critical patent/EP1069374B1/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
    • F21S41/692—Shields, i.e. screens not creating an image meant to be projected
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass

Definitions

  • the present invention relates to motor-vehicle head-lamps, of the type comprising a light source, a reflector associated with the source and a transparent element located in front of the reflector.
  • the invention relates to an adaptive type head-lamp, i.e. a head-lamp adapted to generate an output light beam whose pattern can be varied as a function of the travel conditions of the motor-vehicle (steering angle, speed, etc.) and the environment and light conditions, as well as the road conditions.
  • an adaptive type head-lamp i.e. a head-lamp adapted to generate an output light beam whose pattern can be varied as a function of the travel conditions of the motor-vehicle (steering angle, speed, etc.) and the environment and light conditions, as well as the road conditions.
  • the object of the present invention is that of providing an adaptive head-lamp which on one hand provides an optimized pattern in any condition of use, and on the other hand has a relatively simple structure, with a very reduced bulk and a relatively low cost.
  • the invention provides a head-lamp of the above indicated type, characterized in that:
  • the above mentioned central area where the diaphragm is located is slightly offset downwardly, below the horizontal line passing through the centre of the reflector.
  • motor means are provided for driving movement of diaphragm between its fully closed position and its fully opened position and electronic control means for controlling said motor means are also provided, which receive signals from sensor means for sensing the travel and environment conditions and control the motor means as a function of said signals.
  • the above mentioned sensor means may comprise for instance a sensor of the motor-vehicle steering angle, a speed sensor, a light sensor, a GPS receiver, or also a video camera located on board the vehicle having the function of monitoring both the environment conditions and the conditions of the road on which the motor-vehicle travels.
  • the light source is constituted by a discharge lamp, such as of the D2S of D2R type.
  • the transparent element is preferably a totally transparent element, with no lenses or prisms.
  • the diaphragm is constituted by a substantially rectangular element made of a metal sheet which can be wound or bent.
  • numeral 1 generally designates a motor-vehicle head-lamp, comprising a reflector 2 associated with a light source 3, preferably a discharge lamp, such as of the type marketed under the codes D2S or D2R.
  • a transparent element 4 which is totally transparent, i. e. has no lenses or prisms, is located at the front of the reflector 2.
  • the reflector 2 has two planar walls 5, located at the top and at the bottom, having absorbing features.
  • the materials chosen for reflector 2 and transparent element 4 may be those which are used traditionally in the head-lamps of this type.
  • diaphragm 6 which can be adjusted continuously between a fully closed position (shown in figure 2 and the left-hand part of figure 3) and a fully opened position (shown in the right-hand part of figure 3).
  • diaphragm 6 When diaphragm 6 is in the fully closed condition, it occupies an area corresponding to a substantially central area of the reflector 2, as shown in figure 2.
  • the reflector 2 has an annular area 2a surrounding said central area and having a surface which is shaped so as to generate a light beam coming out of the head-lamp having a basic predetermined pattern, of the "low beam" type.
  • Figure 5 shows the pattern which can be obtained with the head-lamp according to the invention in a plane orthogonal to the optical axis of the head-lamp located at a distance of 25 meters therefrom.
  • axes H and V respectively designate the horizontal and vertical directions, whereas the various lines indicate the profiles of the area illuminated by the head-lamp in the different conditions of use.
  • the basic beam generated by the annular area 2a of reflector 2 is that which gives rise to the pattern designated by line B, of the "low beam” or "cross-beam” type, having features defined by the regulations or more specifically by the car manufacturers.
  • the diaphragm 6 is constituted by a curtain - like element having a substantially rectangular shape, which can be wound on one side (figure 3) or bent in various manners (see the variants of figures 3A, 3B, 3C, 3D).
  • the movement of the diaphragm 6 is controlled by an electric motor which is not shown in figure 3, but is designated by 7 in the block diagram of figure 4.
  • the details of construction of the electric motor controlling the diaphragm 6 and the way by which it is mounted within the head-lamp are not shown herein, since they can be provided in any known way, and since the deletion of these details from the drawings renders the latter simpler and easier to understand.
  • the electric motor 7 which controls the diaphragm 6 is controlled by an electronic control unit 8 which receives a plurality of signals 9 from sensor means sensing the travel and environment conditions of the motor-vehicle.
  • an optical element 10 defining a series of lens sectors which are "uncovered” and thus activated, as a function of the opening degree of the diaphragm 6.
  • the lens sectors of the element 10 are progressively activated to give rise to a number of additional light beams which added to the basic pattern give rise to an overall light beam coming out of the head-lamp having the more appropriate features for any condition of use.
  • the basic pattern B is added with two distinct areas C, as shown in the figure.
  • the two areas D are activated, whereas pattern E is generated for driving on a highway.
  • the elevated illumination pattern F can be generated, for example for reading elevated street signals.
  • the area G is activated instead when a glaring beam has to be obtained.
  • Areas L and R are activated for illuminating the road in a curve to the left or the right, respectively, whereas the sum of the two areas L and R is activated when an anti-fog illumination is wished.
  • the head-lamp had a dimension of 130 mm in the vertical direction and 112 mm in the horizontal direction, with a diaphragm which in the fully closed condition occupied an area of 36 mm (horizontally) x 30 mm (vertically).
  • the diaphragm 6 had an elliptical section of 38 mm x 32 mm and in another variant a circular section with a radius of 36 mm.
  • the signals 9 sent to the electronic control unit 8 may come from sensors of various type, such as a sensor of the motor-vehicle steering angle, a speed sensor, a GPS receiver, and sensors of the environment and light conditions. Additionally or alternatively, a video camera may be used, located on board the motor-vehicle and adapted to the detect both the environment conditions and the conditions of the road on which the motor-vehicle travels.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP99830455A 1999-07-16 1999-07-16 Adaptiver Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, zentralen Blende Expired - Lifetime EP1069374B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99830455A EP1069374B1 (de) 1999-07-16 1999-07-16 Adaptiver Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, zentralen Blende
DE69927006T DE69927006T2 (de) 1999-07-16 1999-07-16 Adaptiver Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, zentralen Blende

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99830455A EP1069374B1 (de) 1999-07-16 1999-07-16 Adaptiver Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, zentralen Blende

Publications (2)

Publication Number Publication Date
EP1069374A1 true EP1069374A1 (de) 2001-01-17
EP1069374B1 EP1069374B1 (de) 2005-08-31

Family

ID=8243504

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99830455A Expired - Lifetime EP1069374B1 (de) 1999-07-16 1999-07-16 Adaptiver Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, zentralen Blende

Country Status (2)

Country Link
EP (1) EP1069374B1 (de)
DE (1) DE69927006T2 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2699259A1 (fr) * 1992-12-14 1994-06-17 Valeo Vision Projecteur de véhicule automobile comportant des moyens pour engendrer deux faisceaux différents à partir d'une même source et d'un même miroir.
EP0705730A2 (de) * 1994-10-04 1996-04-10 Robert Bosch Gmbh Scheinwerfer für Abblendlicht und Fernlicht für Fahrzeuge
DE19642467A1 (de) * 1996-10-15 1998-04-16 Bosch Gmbh Robert Scheinwerferanlage für Fahrzeuge zur Aussendung eines veränderlichen Lichtbündels

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2699259A1 (fr) * 1992-12-14 1994-06-17 Valeo Vision Projecteur de véhicule automobile comportant des moyens pour engendrer deux faisceaux différents à partir d'une même source et d'un même miroir.
EP0705730A2 (de) * 1994-10-04 1996-04-10 Robert Bosch Gmbh Scheinwerfer für Abblendlicht und Fernlicht für Fahrzeuge
DE19642467A1 (de) * 1996-10-15 1998-04-16 Bosch Gmbh Robert Scheinwerferanlage für Fahrzeuge zur Aussendung eines veränderlichen Lichtbündels

Also Published As

Publication number Publication date
EP1069374B1 (de) 2005-08-31
DE69927006D1 (de) 2005-10-06
DE69927006T2 (de) 2006-06-22

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