EP1162401A2 - Projecteur pour véhicule et dispositif d'éclairage avec au moins un tel projecteur - Google Patents

Projecteur pour véhicule et dispositif d'éclairage avec au moins un tel projecteur Download PDF

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Publication number
EP1162401A2
EP1162401A2 EP01112686A EP01112686A EP1162401A2 EP 1162401 A2 EP1162401 A2 EP 1162401A2 EP 01112686 A EP01112686 A EP 01112686A EP 01112686 A EP01112686 A EP 01112686A EP 1162401 A2 EP1162401 A2 EP 1162401A2
Authority
EP
European Patent Office
Prior art keywords
light
wavelength range
headlight
light source
visible
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
EP01112686A
Other languages
German (de)
English (en)
Other versions
EP1162401A3 (fr
EP1162401B1 (fr
Inventor
Johannes Eschler
Reinhold Fiess
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 EP1162401A2 publication Critical patent/EP1162401A2/fr
Publication of EP1162401A3 publication Critical patent/EP1162401A3/fr
Application granted granted Critical
Publication of EP1162401B1 publication Critical patent/EP1162401B1/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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • 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
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/04—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out infrared radiation

Definitions

  • the invention is based on a headlight for vehicles and a lighting device with at least one such headlights according to the preamble of claim 1.
  • the Counciloscuro limit of the The light beam can be designed accordingly Reflector and / or generated by a shielding device through which part of the light source emitted and / or part of that from the reflector reflected light beam is shielded. That from the Light source in the invisible wavelength range emitted light is not used.
  • the Jroscuro limit of the light beam emitted by the headlight in visible Wavelength range is required to dazzle the Avoid oncoming traffic, however, this will Visibility for the vehicle driver is limited, so that this do not recognize objects that are further away can.
  • FIG. 1 shows a vehicle with a Illumination device in a schematic representation a headlight
  • Figure 2 the headlight in an enlarged Representation
  • Figure 3 a detail of a reflector Headlight in an enlarged view
  • Figure 4 a Detail of a deflection device of the headlight
  • 5 shows a distance from the headlight Measuring screen.
  • the Lighting device has at least one at the front end the body of the motor vehicle arranged headlights 10, which is described in more detail below.
  • headlights 10 are provided that are close the side edges of the body are arranged and at least one headlamp as follows is designed. From the headlight 10 is both Light emitted in the visible wavelength range as well Light in the invisible wavelength range.
  • the visible light becomes a direct one for the vehicle driver perceptible lighting in front of the vehicle while for the vehicle driver because of the invisible light caused lighting is not directly perceptible.
  • the lighting device has a sensor device 12 through which the through the invisible light illuminated area in front of the vehicle is detected.
  • the Sensor device 12 can, for example, a video camera, a CCD sensor or a CMOS sensor.
  • the Sensor device 12 is provided with a display device 14 connected, arranged in the driver's field of vision and on the one with the invisible light illuminated area for the vehicle driver is shown.
  • the display device 14 can, for example, be displayed on a screen be or a projection device with which one Image of the area detected by the sensor device 12 is generated on the windshield of the vehicle.
  • the structure of the headlight 10 is described below with reference to FIG Figures 2 to 4 explained in more detail.
  • the headlight 10 has a light source 20 on which both light in visible Wavelength range as well as light in invisible Wavelength range, preferably in the infrared Emits wavelength range.
  • the light source 20 can be one Incandescent lamp or preferably a gas discharge lamp.
  • the light source 20 is inserted into a reflector 22, by the light emitted from the light source 20 as a Beams of light reflected in the visible wavelength range becomes.
  • the reflector 22 has a concavely curved shape and that reflected by this and from the headlight 10th emerging light bundles in the visible wavelength range has an upper light-dark limit.
  • the reflector 22 is the light source 20 on it surrounding inside with a reflective coating 30 provided which forms a reflective surface.
  • the Reflection surface of the reflector 22 can be made smooth be or be divided into several facets, in stages or adjoin kinks.
  • FIG 5 is a distance from the headlight arranged measuring screen 80 shown by the from Headlight 10 emitted light is illuminated.
  • the Measuring screen 80 has a horizontal center plane HH and a vertical center plane W, which is in a point HV to cut.
  • the measuring screen 80 represents the projection a roadway in front of the headlight, the would be illuminated accordingly.
  • the measuring screen 80 is through the light beam emitted by the headlight 10 in visible wavelength range in a region 82 illuminated.
  • the area 82 is up through the Light-dark limit that limits the light beam in visible Has wavelength range.
  • the light-dark boundary shows the oncoming traffic side, that's the one shown Version of the headlight 10 for right-hand traffic the left Side of the measuring screen 80, a horizontal section 83 on, which is slightly below the horizontal central plane HH des Measuring screen 80 runs.
  • the Patoscuro limit On your own traffic side, that is the right side of the measuring screen 80 in right-hand traffic, the Jroscuro limit has one starting from the horizontal Section 83 to the right ascending section 84.
  • the from the headlight 10 in the visible wavelength range emitted light beam thus points to its own A greater range on the traffic side than on the Oncoming traffic side.
  • the light-dark boundary 83.84 dazzling oncoming traffic is prevented, however the Far range above the light-dark boundary 83.84 not illuminated.
  • the deflection device 40 has a diffractive microstructure that forms a diffraction grating.
  • the deflection device 40 does not deflect light by refraction or reflection but by diffraction or diffraction.
  • the deflection device 40 is arranged as a diffractive microstructure on a partial area of the inside of the reflector 22 and is designed to be reflective.
  • FIG. 4 shows an enlarged detail of the deflection device 40, on the basis of which the operation of the deflection device is explained.
  • the deflection device 40 has a microstructure 42 which is, for example, sinusoidal.
  • the microstructure 42 has a period p, which is the distance between two adjacent wave profiles.
  • the microstructure 42 can be used as a deflection mirror for light with a main wavelength ⁇ , in which the angle of reflection ⁇ m can be predetermined over a wide range independently of the angle of incidence ⁇ i.
  • the angle of reflection ⁇ m can be selected over the period p of the diffractive microstructure.
  • the reflector 22 acts in the area of the microstructure 42 like a reflector with a smooth reflection surface and this light is not influenced by the microstructure 42.
  • the microstructure 42 is designed for light in the near infrared wavelength range in such a way that this light, in contrast to the light in the visible wavelength range, is deflected such that it has a greater range than the light in the visible wavelength range.
  • an area 88 is illuminated, the above of the area 82, which is visible with light Wavelength range is illuminated.
  • Preferably closes area 88 is directly above the Patoscuro limit 83.84 to the area 82.
  • the area 82 corresponds to one Close range in front of the vehicle with light in visible Wavelength range is illuminated and the range 88 corresponds to a far range that with light in infrared Wavelength range is illuminated.
  • the area 88 will detected by the sensor device 12 and for the Vehicle drivers visible on the display device 14 shown.
  • Figure 3 is an example of one Light beam 50 in the visible wavelength range thereof Reflection shown on the reflector 22, which leads to that the light beam 50 is inclined downward after reflection runs. It is also an example of a light beam 52 in the infrared wavelength range its deflection by the Microstructure 42 shown, with the light beam 52 after the reflection on the microstructure 42, or at least is less inclined downwards than the Beam of light 50.
  • the diffractive microstructure 42 of the deflection device 40 can also be transmissive, i.e. translucent be formed and in the beam path of the light source 22 emitted light or in the beam path of the Reflector 22 may be arranged reflected light.
  • the Microstructure 42 can in particular be on a Part of the disc 28 may be arranged.
  • the light source 20 is such is trained that this targeted infrared light in one limited wavelength range with high intensity sends out.
  • the microstructure 42 can Deflection device 40 specifically limited to this Wavelength range can be designed so that the light in this wavelength range through the microstructure 42 high efficiency distracted in the given direction can be.
  • the spectral distribution of radiation from the light source 20 emitted light lies in a resonance line in front of the infrared range, corresponding to the in this limited wavelength range with high Intensity of emitted infrared light.
  • Such high radiation intensity in a limited infrared Wavelength range can be added, for example Filling the light source 20, for example the gas mixture, with which the glass bulb of the light source 20 is filled, can be achieved. This is particularly the case with one Gas discharge lamp possible as light source 20.
  • the light source 20 can be of constant electrical power be operated or with pulsed or modulated electrical power.
  • the modulation frequency is preferably at least about 100 Hz, so that for the human eye the modulation is not noticeable is.
  • the sensor device 12 becomes synchronous with the light source 20, that is operated with the same modulation frequency, so that this only illuminates the area 88 is detected when this is illuminated by the light source 20 becomes.
  • the sensor device 12 can have an aperture 15 have through which the incidence of light in the Sensor device 12 is controlled.
  • a sensor device 12 can be used Correlation method or a lock-in reinforcement at the Evaluation of the incident light can be applied to a to achieve interference-free signal processing.
  • Modulated operation of the light source 20 can also be provided be that in the beam path of the sensor device 12 incident light, a filter 16 is arranged, the at least essentially only for that by the Deflection device 40 deflected and the area 88 illuminating light is translucent. This is particularly true in Combination with the training of Light source 20 advantageous, in which this light in one limited wavelength range with high intensity emits, the filter 16 for light in this Wavelength range is transparent.
  • the lighting device can also be a Have evaluation device 18 through which the of the Sensor device 12 detected area 88 with respect to at least one parameter is evaluated.
  • a parameter For example, foreign objects, the course of the road, especially curves or crests, or road markings can be evaluated by the evaluation device 18.
  • the Evaluation device 18 can use this one or more Actuators on the headlight 10 are controlled, by the one characteristic of the headlight 10 in visible wavelength range of emitted light beam is changeable.
  • a characteristic of the headlight 10 emitted visible light beam can for example its range, its course in the horizontal direction or its spread can be changed.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP01112686A 2000-06-08 2001-05-25 Projecteur pour véhicule et dispositif d'éclairage avec au moins un tel projecteur Expired - Lifetime EP1162401B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10028456 2000-06-08
DE10028456A DE10028456A1 (de) 2000-06-08 2000-06-08 Scheinwerfer für Fahrzeuge und Beleuchtungseinrichtung mit wenigstens einem solchen Scheinwerfer

Publications (3)

Publication Number Publication Date
EP1162401A2 true EP1162401A2 (fr) 2001-12-12
EP1162401A3 EP1162401A3 (fr) 2004-03-24
EP1162401B1 EP1162401B1 (fr) 2006-07-26

Family

ID=7645163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01112686A Expired - Lifetime EP1162401B1 (fr) 2000-06-08 2001-05-25 Projecteur pour véhicule et dispositif d'éclairage avec au moins un tel projecteur

Country Status (2)

Country Link
EP (1) EP1162401B1 (fr)
DE (2) DE10028456A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1346875A2 (fr) * 2002-03-01 2003-09-24 Hella KG Hueck & Co. Dispositif de commutation automatique des dispositifs d'éclairage de véhicules
FR2839138A1 (fr) * 2002-04-30 2003-10-31 Valeo Vision Dispositif projecteur bifonction pour vehicule automobile

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19610904A1 (de) 1996-03-20 1997-09-25 Bosch Gmbh Robert Abblendlichtscheinwerfer für Fahrzeuge

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2660262A1 (fr) * 1990-04-02 1991-10-04 Renault Systeme d'eclairage et de visualisation pour vehicules.
IT1256892B (it) * 1992-07-24 1995-12-27 Carello Spa Dispositivo di illuminazione in particolare per autoveicoli

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19610904A1 (de) 1996-03-20 1997-09-25 Bosch Gmbh Robert Abblendlichtscheinwerfer für Fahrzeuge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1346875A2 (fr) * 2002-03-01 2003-09-24 Hella KG Hueck & Co. Dispositif de commutation automatique des dispositifs d'éclairage de véhicules
EP1346875A3 (fr) * 2002-03-01 2006-10-04 Hella KGaA Hueck & Co. Dispositif de commutation automatique des dispositifs d'éclairage de véhicules
FR2839138A1 (fr) * 2002-04-30 2003-10-31 Valeo Vision Dispositif projecteur bifonction pour vehicule automobile
US6976772B2 (en) 2002-04-30 2005-12-20 Valeo Vision Dual-function lamp device for a motor vehicle

Also Published As

Publication number Publication date
DE10028456A1 (de) 2001-12-13
EP1162401A3 (fr) 2004-03-24
EP1162401B1 (fr) 2006-07-26
DE50110522D1 (de) 2006-09-07

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