WO2012045775A1 - Lighting device for producing a dazzle-free full beam headlight function - Google Patents

Lighting device for producing a dazzle-free full beam headlight function Download PDF

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Publication number
WO2012045775A1
WO2012045775A1 PCT/EP2011/067386 EP2011067386W WO2012045775A1 WO 2012045775 A1 WO2012045775 A1 WO 2012045775A1 EP 2011067386 W EP2011067386 W EP 2011067386W WO 2012045775 A1 WO2012045775 A1 WO 2012045775A1
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WO
WIPO (PCT)
Prior art keywords
led
lighting device
led light
light sources
high beam
Prior art date
Application number
PCT/EP2011/067386
Other languages
German (de)
French (fr)
Inventor
Dirk Kliebisch
Original Assignee
Hella Kgaa Hueck & Co.
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 Hella Kgaa Hueck & Co. filed Critical Hella Kgaa Hueck & Co.
Publication of WO2012045775A1 publication Critical patent/WO2012045775A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • B60Q1/1415—Dimming circuits
    • B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
    • B60Q1/143—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic combined with another condition, e.g. using vehicle recognition from camera images or activation of wipers
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • 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
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/05—Special features for controlling or switching of the light beam
    • B60Q2300/054—Variable non-standard intensity, i.e. emission of various beam intensities different from standard intensities, e.g. continuous or stepped transitions of intensity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/05—Special features for controlling or switching of the light beam
    • B60Q2300/056—Special anti-blinding beams, e.g. a standard beam is chopped or moved in order not to blind
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/40—Indexing codes relating to other road users or special conditions
    • B60Q2300/41—Indexing codes relating to other road users or special conditions preceding vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/40—Indexing codes relating to other road users or special conditions
    • B60Q2300/42—Indexing codes relating to other road users or special conditions oncoming vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/40—Indexing codes relating to other road users or special conditions
    • B60Q2300/45—Special conditions, e.g. pedestrians, road signs or potential dangers

Definitions

  • the invention relates to a lighting device for generating a glare-free high-beam function with a number of LED light sources and an optical unit for generating a high-beam function, with a sensor device for detecting oncoming and / or leading road users, with a control device in response to sensor data supplied by the sensor device the LED light sources by dimming or switching on and off so controls that a corresponding to the oncoming and / or driving ahead Entblendungs Surrey the high beam function is formed to send the road user.
  • a lighting device for generating a glare-free high beam function which has a plurality of LED light sources.
  • the LED light sources are associated with an optical unit which has a plurality of adjustable micromirrors each assigned to an LED light source, as well as a reflector or a converging lens.
  • the known lighting device has a sensor device for detecting oncoming and / or leading road users.
  • the known lighting device has a control device, by means of which the LED light sources are controlled so that a non-illuminated Entblendungs Scheme is formed in dependence on the current location of the oncoming and / or preceding road user in the traffic area. This ensures that the traffic participant is not dazzled in traffic space by the lighting device.
  • a disadvantage of the known lighting device is that the mechanical complexity for adjusting the micromirrors is relatively large.
  • a lighting device for generating a glare-free high beam function which has a plurality of LED light sources.
  • a first number of LED light sources is assigned a common first optical unit for generating a basic light function.
  • a second number of LED light sources is associated with a common second optical unit for generating a superimposed on the basic light function high beam function.
  • a control device controls the LED light sources in such a way that in the high beam function a glare range corresponding to the traffic participant in the traffic space is formed, which is illuminated to such an extent that a glare of the road user is avoided.
  • Object of the present invention is therefore to develop a lighting device for generating a glare-free high beam function with a number of LED light sources and an optical unit such that the provision of adapted to the requirements of the traffic space light distributions is improved in a technically simple and effective manner.
  • the invention in conjunction with the preamble of patent claim 1, characterized in that the high-beam function associated optical unit having a plurality of optical elements, each provided for the high beam function LED light source is assigned a separate optical element, such that each LED light source is mapped to a light spot with two opposing vertical bright / dark boundaries.
  • mapping properties defined by assigning separate optical elements to the LED light sources can be realized, so that a predefined glare range can be generated in an entire area of a high beam distribution. Characterized in that a plurality of light spots are mapped with two opposite vertical light / dark boundaries on a screen, can be set by controlling one or more LED light sources, a different width Entblendungs Scheme. Depending on the current position of the road user in the traffic area in front of the lighting device thus improved glare can be created.
  • the optical element is designed such or arranged to the LED light source, that by driving the LED light source on a measuring screen, a rectangular or square light spot is displayed.
  • the high-beam distribution is thus composed of a plurality of such rectangular or square light spots, whereby corresponding vertical light / dark boundaries are imaged by the vertical edges of the light spots, by means of which blanking areas of constant or variable width (in the horizontal direction) can be formed.
  • the glare-free area can thus be adjusted variably as a function of the object to be glazed in the traffic area.
  • the respective optical elements assigned to the LED light sources are arranged or designed in such a way that activated or switched-in LED light sources are imaged onto light spots on a measuring screen, with adjacent light spots overlapping in the horizontal direction.
  • a high-beam distribution can advantageously be generated which, in a non-blinding state of the illumination device in which the high-beam distribution has no glare reduction area, runs homogeneously over the entire width.
  • the LED light sources are each designed as an LED chip or as an LED array, wherein a light spot imaged by the LED array is wider in the horizontal direction than a light spot imaged by the LED chip.
  • a light spot imaged by the LED array is wider in the horizontal direction than a light spot imaged by the LED chip.
  • different widths and locally different glare areas can thus be formed, so that the illumination device can have a relatively compact construction.
  • the LED light sources are arranged in a common plane of extent.
  • Optical elements, which are intended to illuminate an edge region of the high beam distribution are optical elements, the are provided for a central region of the high beam distribution, horizontally offset from the same aligned, so that in the edge region of the high beam distribution depilation areas can be generated with a relatively high illuminance gradient.
  • the LED chips and / or the LED arrays can be controlled in a dimmable manner so that continuous transitions between adjacent light spots can be generated to form the light distribution.
  • At least the LED chips or LED arrays which are provided for illuminating an object detected in the traffic space by the sensor signal, can be controlled such that the object is illuminated with changing illuminance.
  • the changing illuminance can also be realized by periodically switching on and off the corresponding LED light sources according to a flashing.
  • the LED light sources which are selected for illuminating an object in the traffic space, can also be controlled in such a way that the object is illuminated with an increased illuminance compared to adjacent areas of the light distribution.
  • a targeted visual highlighting of an obstacle in the traffic area can be realized thereby, so that the driver can react relatively quickly to the changed traffic situation.
  • the optical element is designed as a reflector or as a lens.
  • the LED light sources and the optical elements are arranged in rows, so that the lighting device can be designed to save space and compact. Further advantages of the invention will become apparent from the further subclaims.
  • FIG. 1 is a front perspective view of a lighting device
  • Fig. 2a shows an image of a LED chip designed as a light source on a
  • FIG. 2b shows an illustration of an LED array formed as an LED light source on a screen
  • 3a shows a representation of a high beam distribution on a screen
  • FIG. 3b shows a representation of a high beam distribution with vertically extending anti-glare areas.
  • a lighting device is used to generate a glare-free high beam function in a motor vehicle (headlights).
  • a headlight should be able to produce a dynamic light function (glare-free high beam), which allows a driving situation-dependent illumination of the road or the traffic area.
  • LED light sources 1 of the headlamp are switched on or off or dimmed (varied in brightness) by means of a control device (not shown).
  • the control device is connected on the input side to a sensor device which is designed to detect oncoming and / or preceding road users (objects). Depending on the sensor data provided by the sensor device, the LED light sources 1 of the lighting device are driven by the control device.
  • a sensor device which is designed to detect oncoming and / or preceding road users (objects).
  • a row of LED light sources 1 is provided, wherein the individual LED light sources 1 are each assigned a reflector 2 as an optical element.
  • the row-shaped reflectors 2 form a common optical unit which, like the LED light sources 1, extends in a straight line and preferably in a horizontal direction.
  • the reflectors 2 are arranged in the main emission direction 3 behind the LED light sources 1, which are thus arranged inclined to a horizontal plane, so that the light emitted by the LED light sources light is deflected to the rear and then to the respective reflectors 2 forward in Hauptabstrahlraum 3 ,
  • the LED light sources 1 may be formed on the one hand as LED chips, by means of which a relatively small light-emitting surface is generated.
  • the LED chip may, for example, have one or two LEDs which are accommodated in a common chip.
  • the LED light source 1 can also be designed as an LED array, which is composed of several LED chips. This results in a relatively large light-emitting surface.
  • FIG. 2 a shows a light spot L 1 of the LED chip depicted on a measuring screen, which is rectangular in shape with long vertical edge sides 4 and short horizontal edge sides 5.
  • FIG. 2 b shows a light spot L 2 of the LED array shown on a measuring screen has relatively short vertical edge sides 6 and long horizontal edge sides 7 compared to the light spot L1.
  • the lighting device may comprise a number of LED chips and / or a number of LED arrays as LED light sources 1.
  • the LED light sources and optical elements shown in FIG. 1 serve to generate a driving situation-dependent high-beam function F, which is superimposed on a basic light function.
  • the basic light function is preferably provided by a further light unit, not shown, which has, for example, LED light sources or gas discharge lamps or halogen lamps.
  • the light distribution shown in FIG. 8 corresponds to a high beam function F, which adjoins a basic light function for illuminating a traffic space located farther away.
  • the LED light sources 1 are each assigned the reflectors 2 as separate optical elements, so that light spots L1, L2 with two opposite vertical light / dark boundaries 4, 6 can be generated selectively.
  • a light distribution 8 according to FIG. 3 a can be formed which corresponds to a high-beam function F.
  • a road user in the vehicle apron is detected by means of the sensor device, such LED light sources 1 of the illumination device are actuated that a glare reduction area 9 with such a low illuminance is set in a modified light distribution 8 'that the road user is not dazzled.
  • the LED light sources 1 corresponding to the screening area 9 can be switched off or dimmed down to a low level of illumination.
  • FIG. 3b for example, three anti-glare areas 9 of the light distribution 8 'are shown; depending on the size of the anti-glare area 9, LED chips and / or LED arrays can be temporarily switched off or dimmed down.
  • the anti-glare areas 9 are each designed as strips which run on a measuring screen as vertical stripes.
  • the fact that the high beam distribution F consists of a juxtaposition of light spots L1, L2 in the horizontal direction, a glare of the road user can be achieved in a simple manner. In this case, it is accepted that even closer to the road user lying or more distant sections of the traffic area are not illuminated. This results in the area of the road users gorges 9 in the traffic area, which are not illuminated.
  • this can be realized in a simple manner a safe glare the road users.
  • the individual optical elements or certain reflectors 2 are aligned offset from one another in the horizontal direction.
  • a number of reflectors 2 sharply focus the light spot further to the left or to the right than other reflectors 2 which image light spots L1, L2 for a central area of the light distribution 8, 8 '.
  • the optical elements can also be arranged such that the light spots L1, L2 overlap in the horizontal direction, that is, the vertical edge sides 4, 6 of adjacent light spots L1, L2 reach in an edge region of the corresponding adjacent light spot L1, L2.
  • the light spots L1, L2 may be square instead of rectangular. It is essential that they have a defined width b1 or b2, so that by dimming or switching off corresponding LED light sources 1, a plurality of locally different or different width defibrillation areas 9 can be realized.
  • the optical elements 2 may also be formed as lenses or as a combination of reflector and lenses.
  • the LED light sources 1 can also be controlled in such a way that blinking areas are generated which point to an object in the traffic area which is to be perceived as an obstacle for the vehicle driver.
  • the corresponding object is illuminated with changing illuminance, for example periodically, so that this blinking the attention of the driver is directed to this object.
  • the flashing may take place partially in a region of the light distribution 8 in which the object to be perceived as an obstacle is located.
  • the entire light distribution or part of the light distribution can flash up and down, which is particularly useful if it is a relatively small or far away obstacle.
  • the object to be perceived as an obstacle can also be illuminated by switching on LED light sources, so that the object is illuminated with a higher illuminance than adjacent areas of the light distribution 8. In this way, the driver's attention to the obstacle can also be increased.

Abstract

The invention relates to a lighting device for producing a dazzle-free full beam headlight function (F) with a number of LED light sources (1) and an optical unit (2) for producing a full beam headlight function (F), having a sensor device for detecting oncoming road users and/or road users travelling ahead, having a control device which, by dimming or switching on and off, actuates the LED light sources (1) as a function of sensor data supplied by the sensor device, in such a way that a non-dazzling region (9) of the full beam headlight function (F), corresponding to the oncoming road user and/or road user travelling ahead, is formed in order to prevent dazzling of the road user, characterized in that at least the optical unit (2) which is assigned to the full beam headlight function (F) has a multiplicity of optical elements (2), with each LED light source (1) which is provided for the full beam headlight function (F) is assigned a separate optical element (2) in such a way that each LED light source (1) is mapped as a light spot (L1, L2) with two vertical bright/dark boundaries lying opposite one another on a measuring screen.

Description

Beleuchtungsvorrichtung zur Erzeugung einer blendfreien Fernlichtfunktion  Lighting device for generating a glare-free high beam function
Beschreibung description
Die Erfindung betrifft eine Beleuchtungsvorrichtung zur Erzeugung einer blendfreien Fernlichtfunktion mit einer Anzahl von LED-Lichtquellen und einer Optikeinheit zur Erzeugung einer Fernlichtfunktion, mit einer Sensoreinrichtung zur Erfassung entgegenkommender und/oder vorausfahrender Verkehrsteilnehmer, mit einer Steuereinrichtung, die in Abhängigkeit von durch die Sensoreinrichtung gelieferten Sensordaten die LED-Lichtquellen durch Dimmung oder Ein- und Ausschalten so ansteuert, dass ein zu dem entgegenkommenden und/oder vorausfahrenden Verkehrsteilnehmer korrespondierender Entblendungsbereich der Fernlichtfunktion gebildet wird zur Entsendung des Verkehrsteilnehmers. The invention relates to a lighting device for generating a glare-free high-beam function with a number of LED light sources and an optical unit for generating a high-beam function, with a sensor device for detecting oncoming and / or leading road users, with a control device in response to sensor data supplied by the sensor device the LED light sources by dimming or switching on and off so controls that a corresponding to the oncoming and / or driving ahead Entblendungsbereich the high beam function is formed to send the road user.
Aus der DE 10 2004 042 092 A1 ist eine Beleuchtungsvorrichtung zur Erzeugung einer blendfreien Fernlichtfunktion bekannt, die eine Mehrzahl von LED-Lichtquellen aufweist. Den LED-Lichtquellen ist eine Optikeinheit zugeordnet, die eine Mehrzahl von jeweils einer LED-Lichtquelle zugeordneten verstellbaren Mikrospiegeln sowie einen Reflektor oder eine Sammellinse aufweist. Die bekannte Beleuchtungsvorrichtung weist eine Sensoreinrichtung zur Erfassung entgegenkommender und/oder vorausfahrender Verkehrsteilnehmer auf. Ferner weist die bekannte Beleuchtungsvorrichtung eine Steuereinrichtung auf, mittels derer die LED-Lichtquellen so angesteuert werden, dass in Abhängigkeit von dem aktuellen Ort des entgegenkommenden und/oder vorausfahrenden Verkehrsteilnehmers im Verkehrsraum ein nicht ausgeleuchteter Entblendungsbereich gebildet wird. Hierdurch wird sichergestellt, dass der Verkehrteilnehmer im Verkehrsraum von der Beleuchtungsvorrichtung nicht geblendet wird. Nachteilig an der bekannten Beleuchtungsvorrichtung ist, dass der mechanische Aufwand zum Verstellen der Mikrospiegel relativ groß ist. From DE 10 2004 042 092 A1 a lighting device for generating a glare-free high beam function is known, which has a plurality of LED light sources. The LED light sources are associated with an optical unit which has a plurality of adjustable micromirrors each assigned to an LED light source, as well as a reflector or a converging lens. The known lighting device has a sensor device for detecting oncoming and / or leading road users. Furthermore, the known lighting device has a control device, by means of which the LED light sources are controlled so that a non-illuminated Entblendungsbereich is formed in dependence on the current location of the oncoming and / or preceding road user in the traffic area. This ensures that the traffic participant is not dazzled in traffic space by the lighting device. A disadvantage of the known lighting device is that the mechanical complexity for adjusting the micromirrors is relatively large.
Aus der DE 10 2005 041 234 A1 ist eine Beleuchtungsvorrichtung zur Erzeugung einer blendfreien Fernlichtfunktion bekannt, die eine Mehrzahl von LED-Lichtquellen aufweist. Einer ersten Anzahl von LED-Lichtquellen ist eine gemeinsame erste Optikeinheit zur Erzeugung einer Basislichtfunktion zugeordnet. Einer zweiten Anzahl von LED-Lichtquellen ist eine gemeinsame zweite Optikeinheit zur Erzeugung einer die Basislichtfunktion überlagernden Fernlichtfunktion zugeordnet. In Abhängigkeit von mittels einer Sensoreinrichtung ermittelten Sensordaten über einen entgegenkommenden und/oder vorausfahrenden Verkehrsteilnehmer steuert eine Steuereinrichtung die LED-Lichtquellen so an, dass in der Fernlichtfunktion ein zu dem Verkehrsteilnehmer im Verkehrsraum korrespondierender Entblendungsbereich gebildet wird, der in einem solchen Umfang ausgeleuchtet wird, dass eine Entblendung des Verkehrsteilnehmers vermieden wird. Zur Erzeugung der blendfreien Fernlichtfunktion ist kein Verschwenken von Bauteilen erforderlich, was den Steuerungsaufwand reduziert. Allerdings ergeben sich aufgrund der relativ breiten Ausdehnung der als Linse ausgebildeten Optikeinheit Abbildungsfehler in einem Randbereich der Lichtverteilung, was die Entblendung in diesem Randbereich einschränkt. From DE 10 2005 041 234 A1 a lighting device for generating a glare-free high beam function is known, which has a plurality of LED light sources. A first number of LED light sources is assigned a common first optical unit for generating a basic light function. A second number of LED light sources is associated with a common second optical unit for generating a superimposed on the basic light function high beam function. In dependence on sensor data determined by means of a sensor device via an oncoming and / or preceding road user, a control device controls the LED light sources in such a way that in the high beam function a glare range corresponding to the traffic participant in the traffic space is formed, which is illuminated to such an extent that a glare of the road user is avoided. To create the glare-free high beam function, no pivoting of components is required, which reduces the control effort. However, due to the relatively wide extent of the optical unit designed as a lens, aberrations result in an edge region of the light distribution, which limits the glare reduction in this edge region.
Aufgabe der vorliegenden Erfindung ist es daher, eine Beleuchtungsvorrichtung zur Erzeugung einer blendfreien Fernlichtfunktion mit einer Anzahl von LED-Lichtquellen und einer Optikeinheit derart weiterzubilden, dass die Bereitstellung von an die Erfordernisse des Verkehrsraums angepasste Lichtverteilungen auf lichttechnisch einfache und wirksame Weise verbessert wird. Object of the present invention is therefore to develop a lighting device for generating a glare-free high beam function with a number of LED light sources and an optical unit such that the provision of adapted to the requirements of the traffic space light distributions is improved in a technically simple and effective manner.
Zur Lösung dieser Aufgabe ist die Erfindung in Verbindung mit dem Oberbegriff des Patentanspruchs 1 , dadurch gekennzeichnet, dass die der Fernlichtfunktion zugeordnete Optikeinheit eine Mehrzahl von Optikelementen aufweist, wobei jeder für die Fernlichtfunktion vorgesehene LED-Lichtquelle ein gesondertes Optikelement zugeordnet ist, derart, dass jede LED-Lichtquelle zu einem Lichtfleck mit zwei gegenüberliegenden vertikalen Hell/Dunkel-Grenzen abgebildet wird. To achieve this object, the invention in conjunction with the preamble of patent claim 1, characterized in that the high-beam function associated optical unit having a plurality of optical elements, each provided for the high beam function LED light source is assigned a separate optical element, such that each LED light source is mapped to a light spot with two opposing vertical bright / dark boundaries.
Der besondere Vorteil der Erfindung besteht darin, dass durch Zuordnung gesonderter Optikelemente jeweils zu den LED-Lichtquellen definierte Abbildungseigenschaften realisierbar sind, so dass in einem gesamten Bereich einer Fernlichtverteilung ein vorgegebener Entblendungsbereich erzeugbar ist. Dadurch, dass eine Mehrzahl von Lichtflecken mit zwei gegenüberliegenden vertikalen Hell/Dunkel-Grenzen auf einem Messschirm abgebildet werden, kann durch Ansteuerung einzelner oder mehrerer LED-Lichtquellen ein unterschiedlich breiter Entblendungsbereich eingestellt werden. In Abhängigkeit von der aktuellen Position des Verkehrsteilnehmers in dem Verkehrsraum vor der Beleuchtungsvorrichtung kann somit eine verbesserte Entblendung geschaffen werden. The particular advantage of the invention is that mapping properties defined by assigning separate optical elements to the LED light sources can be realized, so that a predefined glare range can be generated in an entire area of a high beam distribution. Characterized in that a plurality of light spots are mapped with two opposite vertical light / dark boundaries on a screen, can be set by controlling one or more LED light sources, a different width Entblendungsbereich. Depending on the current position of the road user in the traffic area in front of the lighting device thus improved glare can be created.
Nach einer bevorzugten Ausführungsform der Erfindung ist das Optikelement derart ausgebildet bzw. zu der LED-Lichtquelle angeordnet, dass durch Ansteuerung der LED-Lichtquelle auf einem Messschirm ein rechteckförmiger oder quadratischer Lichtfleck abgebildet wird. Die Fernlichtverteilung setzt sich somit aus mehreren solcher rechteckförmiger oder quadratischer Lichtflecken zusammen wobei durch die vertikalen Kanten der Lichtflecken entsprechende vertikale Hell/Dunkel-Grenzen abgebildet werden, mittels derer Entblendungsbereiche konstanter oder variabler Breite (in horizontaler Richtung) bildbar sind. Der Entblendungsbereich kann somit variabel in Abhängigkeit von dem zu entblendenden Objekt im Verkehrsraum eingestellt werden. According to a preferred embodiment of the invention, the optical element is designed such or arranged to the LED light source, that by driving the LED light source on a measuring screen, a rectangular or square light spot is displayed. The high-beam distribution is thus composed of a plurality of such rectangular or square light spots, whereby corresponding vertical light / dark boundaries are imaged by the vertical edges of the light spots, by means of which blanking areas of constant or variable width (in the horizontal direction) can be formed. The glare-free area can thus be adjusted variably as a function of the object to be glazed in the traffic area.
Nach einer Weiterbildung der Erfindung sind die jeweils den LED-Lichtquellen zugeordneten Optikelemente derart angeordnet bzw. ausgebildet, dass angesteuerte bzw. eingeschaltete LED-Lichtquellen auf einem Messschirm zu Lichtflecken abgebildet werden, wobei sich in horizontaler Richtung benachbarte Lichtflecken überlappen. Vorteilhaft kann hierdurch eine Fernlichtverteilung erzeugt werden, die in einem Nicht- entblendungszustand der Beleuchtungsvorrichtung, in dem die Fernlichtverteilung keinen Entblendungsbereich aufweist, homogen über die gesamte Breite verläuft. According to a development of the invention, the respective optical elements assigned to the LED light sources are arranged or designed in such a way that activated or switched-in LED light sources are imaged onto light spots on a measuring screen, with adjacent light spots overlapping in the horizontal direction. In this way, a high-beam distribution can advantageously be generated which, in a non-blinding state of the illumination device in which the high-beam distribution has no glare reduction area, runs homogeneously over the entire width.
Nach einer Weiterbildung der Erfindung sind die LED-Lichtquellen jeweils als ein LED- Chip oder als ein LED-Array ausgebildet, wobei ein von dem LED-Array abgebildeter Lichtfleck in horizontaler Richtung breiter ausgebildet ist als ein durch den LED-Chip abgebildeter Lichtfleck. In Abhängigkeit von der Ansteuerung von LED-Chips und/oder LED-Arrays lassen sich somit unterschiedlich breite und örtlich unterschiedliche Entblendungsbereiche bilden, so dass die Beleuchtungsvorrichtung einen relativ kompakten Aufbau aufweisen kann. According to a development of the invention, the LED light sources are each designed as an LED chip or as an LED array, wherein a light spot imaged by the LED array is wider in the horizontal direction than a light spot imaged by the LED chip. Depending on the driving of LED chips and / or LED arrays, different widths and locally different glare areas can thus be formed, so that the illumination device can have a relatively compact construction.
Nach einer Weiterbildung der Erfindung sind die LED-Lichtquellen in einer gemeinsamen Erstreckungsebene angeordnet. Optikelemente, die zur Beleuchtung eines Randbereiches der Fernlichtverteilung vorgesehen sind, sind zu Optikelementen, die für einen Mittenbereich der Fernlichtverteilung vorgesehen sind, horizontal versetzt zu denselben ausgerichtet, so dass im Randbereich der Fernlichtverteilung Entblen- dungsbereiche mit einem relativ hohen Beleuchtungsstärkegradient erzeugt werden können. According to a development of the invention, the LED light sources are arranged in a common plane of extent. Optical elements, which are intended to illuminate an edge region of the high beam distribution, are optical elements, the are provided for a central region of the high beam distribution, horizontally offset from the same aligned, so that in the edge region of the high beam distribution depilation areas can be generated with a relatively high illuminance gradient.
Nach einer Weiterbildung der Erfindung sind die LED-Chips und/oder die LED-Arrays dimmbar ansteuerbar, so dass kontinuierliche Übergänge zwischen benachbarten Lichtflecken zur Bildung der Lichtverteilung erzeugt werden können. According to a development of the invention, the LED chips and / or the LED arrays can be controlled in a dimmable manner so that continuous transitions between adjacent light spots can be generated to form the light distribution.
Nach einer Weiterbildung der Erfindung sind zumindest die LED-Chips bzw. LED- Arrays, die zur Beleuchtung eines durch das Sensorsignal erfassten Objekts im Verkehrsraum vorgesehen sind, derart ansteuerbar, dass das Objekt mit wechselnder Beleuchtungsstärke beleuchtet wird. Hierdurch kann eine erleichterte Aufmerksamkeit des Fahrzeugführers auf ein eventuelles Hindernis im Verkehrsraum gelenkt werden. Die wechselnde Beleuchtungsstärke kann auch durch periodisches Ein- und Ausschalten der entsprechenden LED-Lichtquellen verwirklicht werden entsprechend einem Blinken. According to a development of the invention, at least the LED chips or LED arrays, which are provided for illuminating an object detected in the traffic space by the sensor signal, can be controlled such that the object is illuminated with changing illuminance. In this way, a facilitated attention of the driver can be directed to a potential obstacle in the traffic area. The changing illuminance can also be realized by periodically switching on and off the corresponding LED light sources according to a flashing.
Nach einer Weiterbildung der Erfindung können die LED-Lichtquellen, die zur Beleuchtung eines Objektes im Verkehrsraum ausgewählt sind, auch derart angesteuert sein, dass das Objekt mit einer im Vergleich zu benachbarten Bereichen der Lichtverteilung erhöhten Beleuchtungsstärke beleuchtet wird. Vorteilhaft kann hierdurch eine gezielte optische Hervorhebung eines Hindernisses im Verkehrsraum verwirklicht werden, so dass der Fahrzeugführer relativ schnell auf die geänderte Verkehrssituation reagieren kann. According to a development of the invention, the LED light sources, which are selected for illuminating an object in the traffic space, can also be controlled in such a way that the object is illuminated with an increased illuminance compared to adjacent areas of the light distribution. Advantageously, a targeted visual highlighting of an obstacle in the traffic area can be realized thereby, so that the driver can react relatively quickly to the changed traffic situation.
Nach einer Weiterbildung der Erfindung ist das Optikelement als ein Reflektor oder als eine Linse ausgebildet. According to a development of the invention, the optical element is designed as a reflector or as a lens.
Nach einer Weiterbildung der Erfindung sind die LED-Lichtquellen und die Optikelemente reihenförmig angeordnet, so dass die Beleuchtungsvorrichtung relativ platzsparend und kompakt ausgebildet sein kann. Weitere Vorteile der Erfindung ergeben sich aus den weiteren Unteransprüchen. According to a development of the invention, the LED light sources and the optical elements are arranged in rows, so that the lighting device can be designed to save space and compact. Further advantages of the invention will become apparent from the further subclaims.
Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen näher erläutert. An embodiment of the invention will be explained in more detail with reference to the drawings.
Es zeigen: Show it:
Fig. 1 eine perspektivische Vorderansicht einer Beleuchtungsvorrichtung, 1 is a front perspective view of a lighting device,
Fig. 2a eine Abbildung einer als LED-Chip ausgebildeten Lichtquelle auf einem Fig. 2a shows an image of a LED chip designed as a light source on a
Messschirm,  Measuring screen,
Fig. 2b eine Abbildung einer als LED-Array ausgebildeten LED-Lichtquelle auf einem Messschirm, 2b shows an illustration of an LED array formed as an LED light source on a screen,
Fig. 3a eine Darstellung einer Fernlichtverteilung auf einem Messschirm und 3a shows a representation of a high beam distribution on a screen and
Fig. 3b eine Darstellung einer Fernlichtverteilung mit vertikal verlaufenden Ent- blendungsbereichen. FIG. 3b shows a representation of a high beam distribution with vertically extending anti-glare areas. FIG.
Eine erfindungsgemäße Beleuchtungsvorrichtung wird zur Erzeugung einer blendfreien Fernlichtfunktion in einem Kraftfahrzeug eingesetzt (Scheinwerfer). Ein solcher Scheinwerfer soll in der Lage sein, eine dynamische Lichtfunktion (blendfreies Fernlicht) zu erzeugen, die eine fahrsituationsabhängige Ausleuchtung der Fahrbahn bzw. des Verkehrsraums ermöglicht. Zu diesem Zweck werden LED-Lichtquellen 1 des Scheinwerfers mittels einer nicht dargestellten Steuereinrichtung ein- bzw. ausgeschaltet bzw. gedimmt (in der Helligkeit variiert). Die Steuereinrichtung ist eingangs- seitig mit einer Sensoreinrichtung verbunden, die dazu ausgelegt ist, entgegenkommende und/oder vorausfahrende Verkehrsteilnehmer (Objekte) zu erfassen. In Abhängigkeit von durch die Sensoreinrichtung bereitgestellten Sensordaten werden die LED-Lichtquellen 1 der Beleuchtungsvorrichtung durch die Steuereinrichtung angesteuert. Im vorliegenden Ausführungsbeispiel gemäß Figur 1 ist eine Reihe von LED-Lichtquellen 1 vorgesehen, wobei den einzelnen LED-Lichtquellen 1 jeweils ein Reflektor 2 als Optikelement zugeordnet sind. Die reihenförmig angeordneten Reflektoren 2 bilden eine gemeinsame Optikeinheit, die sich wie die LED-Lichtquellen 1 geradlinig und vorzugsweise in horizontaler Richtung erstrecken. Die Reflektoren 2 sind in Hauptabstrahlrichtung 3 hinter den LED-Lichtquellen 1 angeordnet, die somit geneigt zu einer horizontalen Ebene angeordnet sind, damit das von den LED-Lichtquellen abgestrahlte Licht nach hinten und dann an den jeweiligen Reflektoren 2 nach vorne in Hauptabstrahlrichtung 3 umgelenkt wird. A lighting device according to the invention is used to generate a glare-free high beam function in a motor vehicle (headlights). Such a headlight should be able to produce a dynamic light function (glare-free high beam), which allows a driving situation-dependent illumination of the road or the traffic area. For this purpose, LED light sources 1 of the headlamp are switched on or off or dimmed (varied in brightness) by means of a control device (not shown). The control device is connected on the input side to a sensor device which is designed to detect oncoming and / or preceding road users (objects). Depending on the sensor data provided by the sensor device, the LED light sources 1 of the lighting device are driven by the control device. In the present exemplary embodiment according to FIG. 1, a row of LED light sources 1 is provided, wherein the individual LED light sources 1 are each assigned a reflector 2 as an optical element. The row-shaped reflectors 2 form a common optical unit which, like the LED light sources 1, extends in a straight line and preferably in a horizontal direction. The reflectors 2 are arranged in the main emission direction 3 behind the LED light sources 1, which are thus arranged inclined to a horizontal plane, so that the light emitted by the LED light sources light is deflected to the rear and then to the respective reflectors 2 forward in Hauptabstrahlrichtung 3 ,
Die LED-Lichtquellen 1 können zum einen als LED-Chips ausgebildet sein, mittels derer eine relativ kleine Licht abstrahlende Fläche erzeugt wird. Der LED-Chip kann beispielsweise ein oder zwei LEDs aufweisen, die in einem gemeinsamen Chip untergebracht sind. The LED light sources 1 may be formed on the one hand as LED chips, by means of which a relatively small light-emitting surface is generated. The LED chip may, for example, have one or two LEDs which are accommodated in a common chip.
Zum anderen kann die LED-Lichtquelle 1 auch als ein LED-Array ausgebildet sein, das aus mehreren LED-Chips zusammengesetzt ist. Hierdurch ergibt sich eine relativ große Licht abstrahlende Fläche. On the other hand, the LED light source 1 can also be designed as an LED array, which is composed of several LED chips. This results in a relatively large light-emitting surface.
In Figur 2a ist ein auf einem Messschirm abgebildeter Lichtfleck L1 des LED-Chips dargestellt, der rechteckförmig ausgebildet ist mit langen vertikalen Randseiten 4 und kurzen horizontalen Randseiten 5. In Figur 2b ist ein auf einem Messschirm abgebildeter Lichtfleck L2 des LED-Arrays dargestellt, der im Vergleich zu dem Lichtfleck L1 relativ kurze vertikale Randseiten 6 und lange horizontale Randseiten 7 aufweist. FIG. 2 a shows a light spot L 1 of the LED chip depicted on a measuring screen, which is rectangular in shape with long vertical edge sides 4 and short horizontal edge sides 5. FIG. 2 b shows a light spot L 2 of the LED array shown on a measuring screen has relatively short vertical edge sides 6 and long horizontal edge sides 7 compared to the light spot L1.
Die Beleuchtungsvorrichtung kann eine Anzahl von LED-Chips und/oder eine Anzahl von LED-Arrays als LED-Lichtquellen 1 aufweisen. The lighting device may comprise a number of LED chips and / or a number of LED arrays as LED light sources 1.
Die in Figur 1 dargestellten LED-Lichtquellen und Optikelemente dienen zur Erzeugung einer fahrsituationabhängigen Fernlichtfunktion F, die einer Basislichtfunktion überlagert ist. Die Basislichtfunktion wird vorzugsweise durch eine nicht dargestellte weitere Lichteinheit, die beispielsweise LED-Lichtquellen oder Gasentladungslampen oder Halogenlampen aufweist, bereitgestellt. Die in Figur 3a dargestellte Lichtvertei- lung 8 entspricht einer Fernlichtfunktion F, die sich zur Ausleuchtung eines weiter entfernt liegenden Verkehrsraums an eine Basislichtfunktion anschließt. The LED light sources and optical elements shown in FIG. 1 serve to generate a driving situation-dependent high-beam function F, which is superimposed on a basic light function. The basic light function is preferably provided by a further light unit, not shown, which has, for example, LED light sources or gas discharge lamps or halogen lamps. The light distribution shown in FIG. 8 corresponds to a high beam function F, which adjoins a basic light function for illuminating a traffic space located farther away.
Um eine Vielzahl von unterschiedlichen Beleuchtungssituationen zu erzeugen, sind den LED-Lichtquellen 1 jeweils die Reflektoren 2 als gesonderte Optikelemente zugeordnet, so dass selektiv Lichtflecke L1 , L2 mit zwei gegenüberliegenden vertikalen Hell/Dunkel-Grenzen 4, 6 erzeugt werden können. Wenn alle LED-Lichtquellen 1 eingeschaltet sind, kann eine Lichtverteilung 8 gemäß Figur 3a gebildet werden, die einer Fernlichtfunktion F entspricht. In order to produce a multiplicity of different lighting situations, the LED light sources 1 are each assigned the reflectors 2 as separate optical elements, so that light spots L1, L2 with two opposite vertical light / dark boundaries 4, 6 can be generated selectively. When all the LED light sources 1 are switched on, a light distribution 8 according to FIG. 3 a can be formed which corresponds to a high-beam function F.
Wird mittels der Sensoreinrichtung ein Verkehrsteilnehmer im Fahrzeugvorfeld detek- tiert, werden solche LED-Lichtquellen 1 der Beleuchtungsvorrichtung angesteuert, dass sich in einer modifizierten Lichtverteilung 8' ein Entblendungsbereich 9 mit einer solchen geringen Beleuchtungsstärke einstellt, dass der Verkehrsteilnehmer nicht geblendet wird. Beispielsweise können die zu dem Entblendungsbereich 9 korrespondierenden LED-Lichtquellen 1 ausgeschaltet oder auf eine niedrige Beleuchtungsstärke heruntergedimmt sein. If a road user in the vehicle apron is detected by means of the sensor device, such LED light sources 1 of the illumination device are actuated that a glare reduction area 9 with such a low illuminance is set in a modified light distribution 8 'that the road user is not dazzled. For example, the LED light sources 1 corresponding to the screening area 9 can be switched off or dimmed down to a low level of illumination.
In Figur 3b sind beispielsweise drei Entblendungsbereiche 9 der Lichtverteilung 8' dargestellt, in Abhängigkeit von der Größe des Entblendungsbereichs 9 können LED- Chips und/oder LED-Arrays zeitweise ausgeschaltet bzw. heruntergedimmt werden. Die Entblendungsbereiche 9 sind jeweils als Streifen ausgebildet, die auf einem Messschirm als vertikale Streifen verlaufen. Dadurch, dass die Fernlichtverteilung F aus einer Aneinanderreihung von Lichtflecken L1 , L2 in horizontaler Richtung besteht, kann auf einfache Weise eine Entblendung des Verkehrsteilnehmers erzielt werden. Hierbei wird in Kauf genommen, dass auch näher zum Verkehrsteilnehmer liegende oder weiter entfernt liegende Abschnitte des Verkehrsraums nicht ausgeleuchtet werden. Es ergeben sich somit im Bereich der Verkehrsteilnehmer Schluchten 9 in dem Verkehrsraum, die nicht beleuchtet werden. Vorteilhaft kann hierdurch auf einfache Weise eine sichere Entblendung der Verkehrsteilnehmer realisiert werden. Damit insbesondere in einem Randbereich, vorzugsweise in einem rechten und/oder linken Randbereich der Lichtverteilung 8, 8' bzw. F eine zuverlässige Entblendung ermöglicht wird, sind die einzelnen Optikelemente bzw. bestimmte Reflektoren 2 in horizontaler Richtung versetzt zueinander ausgerichtet. Eine Anzahl von Reflektoren 2 bildet den Lichtfleck weiter nach links oder nach rechts scharf ab als andere Reflektoren 2, die Lichtflecken L1 , L2 für einen Mittenbereich der Lichtverteilung 8, 8' abbilden. In FIG. 3b, for example, three anti-glare areas 9 of the light distribution 8 'are shown; depending on the size of the anti-glare area 9, LED chips and / or LED arrays can be temporarily switched off or dimmed down. The anti-glare areas 9 are each designed as strips which run on a measuring screen as vertical stripes. The fact that the high beam distribution F consists of a juxtaposition of light spots L1, L2 in the horizontal direction, a glare of the road user can be achieved in a simple manner. In this case, it is accepted that even closer to the road user lying or more distant sections of the traffic area are not illuminated. This results in the area of the road users gorges 9 in the traffic area, which are not illuminated. Advantageously, this can be realized in a simple manner a safe glare the road users. In order to enable reliable glare suppression, in particular in an edge region, preferably in a right and / or left edge region of the light distribution 8, 8 'or F, the individual optical elements or certain reflectors 2 are aligned offset from one another in the horizontal direction. A number of reflectors 2 sharply focus the light spot further to the left or to the right than other reflectors 2 which image light spots L1, L2 for a central area of the light distribution 8, 8 '.
Um eine homogene Lichtverteilung 8 in horizontaler Richtung zu erhalten, können die Optikelemente (Reflektoren 2) auch so angeordnet sein, dass die Lichtflecken L1 , L2 sich in horizontaler Richtung überlappen, das heißt die vertikalen Randseiten 4, 6 benachbarter Lichtflecken L1 , L2 reichen in einen Randbereich des entsprechenden benachbarten Lichtflecks L1 , L2 ein. In order to obtain a homogeneous light distribution 8 in the horizontal direction, the optical elements (reflectors 2) can also be arranged such that the light spots L1, L2 overlap in the horizontal direction, that is, the vertical edge sides 4, 6 of adjacent light spots L1, L2 reach in an edge region of the corresponding adjacent light spot L1, L2.
Nach einer nicht dargestellten alternativen Ausführungsform können die Lichtflecken L1 , L2 statt rechteckförmig auch quadratisch ausgebildet sein. Wesentlich ist, dass sie eine definierte Breite b1 bzw. b2 haben, so dass durch Abdimmen bzw. Abschalten entsprechender LED-Lichtquellen 1 eine Vielzahl von örtlich unterschiedlichen bzw. unterschiedlich breiten Entblendungsbereichen 9 realisierbar sind. According to an alternative embodiment not shown, the light spots L1, L2 may be square instead of rectangular. It is essential that they have a defined width b1 or b2, so that by dimming or switching off corresponding LED light sources 1, a plurality of locally different or different width defibrillation areas 9 can be realized.
Nach einer alternativen Ausführungsform der Erfindung können die Optikelemente 2 auch als Linsen oder als Kombination aus Reflektor und Linsen ausgebildet sein. According to an alternative embodiment of the invention, the optical elements 2 may also be formed as lenses or as a combination of reflector and lenses.
Nach einer alternativen Ausführungsform der Erfindung können die LED-Lichtquellen 1 auch so angesteuert werden, dass Blinkbereiche erzeugt werden, die auf ein Objekt im Verkehrsraum hinweisen, das für den Fahrzeugführer als Hindernis wahrgenommen werden soll. In diesem Fall wird das entsprechende Objekt mit wechselnder Beleuchtungsstärke, beispielsweise periodisch, beleuchtet, so dass durch dieses Aufblinken die Aufmerksamkeit des Fahrzeugführers auf dieses Objekt gelenkt wird. Das Aufblinken kann partiell in einem Bereich der Lichtverteilung 8 erfolgen, in dem sich das als Hindernis wahrzunehmende Objekt befindet. Alternativ kann auch die gesamte Lichtverteilung oder ein Teil der Lichtverteilung auf- und abblinken, was insbesondere sinnvoll ist, wenn es sich um ein relativ kleines oder weit entferntes Hindernis handelt. Nach einer alternativen Ausführungsform kann das als Hindernis wahrzunehmende Objekt auch durch Aufschaltung von LED-Lichtquellen beleuchtet werden, so dass das Objekt mit einer höheren Beleuchtungsstärke beleuchtet wird als benachbarte Bereiche der Lichtverteilung 8. Hierdurch kann ebenfalls die Aufmerksamkeit des Fahrzeugführers auf das Hindernis erhöht werden. According to an alternative embodiment of the invention, the LED light sources 1 can also be controlled in such a way that blinking areas are generated which point to an object in the traffic area which is to be perceived as an obstacle for the vehicle driver. In this case, the corresponding object is illuminated with changing illuminance, for example periodically, so that this blinking the attention of the driver is directed to this object. The flashing may take place partially in a region of the light distribution 8 in which the object to be perceived as an obstacle is located. Alternatively, the entire light distribution or part of the light distribution can flash up and down, which is particularly useful if it is a relatively small or far away obstacle. According to an alternative embodiment, the object to be perceived as an obstacle can also be illuminated by switching on LED light sources, so that the object is illuminated with a higher illuminance than adjacent areas of the light distribution 8. In this way, the driver's attention to the obstacle can also be increased.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 LED-Lichtquellen 1 LED light sources
2 Reflektor  2 reflector
3 Hauptabstrahlrichtung 3 main emission direction
4 lange vertikale Randseite4 long vertical edge side
5 kurze horizontale Randseite5 short horizontal edge side
6 kurze vertikale Randseite6 short vertical edge side
7 lange horizontale Randseite 8, 8' Lichtverteilung 7 long horizontal edge side 8, 8 'light distribution
9 Entblendungsbereich b1 , b2 Breite  9 Exposure range b1, b2 width
F Fernlichtfunktion F high beam function
L1. L2 Lichtflecken L1. L2 light spots

Claims

Patentansprüche claims
1. Beleuchtungsvorrichtung zur Erzeugung einer blendfreien Fernlichtfunktion mit einer Anzahl von LED-Lichtquellen und einer Optikeinheit zur Erzeugung einer Fernlichtfunktion, mit einer Sensoreinrichtung zur Erfassung entgegenkommender und/oder vorausfahrender Verkehrsteilnehmer, mit einer Steuereinrichtung, die in Abhängigkeit von durch die Sensoreinrichtung gelieferten Sensordaten die LED-Lichtquellen durch Dimmung oder Ein- und Ausschalten so ansteuert, dass ein zu dem entgegenkommenden und/oder vorausfahrenden Verkehrsteilnehmer korrespondierender Entblendungsbereich der Fernlichtfunktion gebildet wird zur Entblendung des Verkehrsteilnehmers, dadurch gekennzeichnet, dass die der Fernlichtfunktion (F) zugeordnete Optikeinheit eine Mehrzahl von Optikelementen (2) aufweist, wobei jeder für die Fernlichtfunktion (F) vorgesehenen LED-Lichtquelle (1) ein gesondertes Optikelement (2) zugeordnet ist, derart, dass jede LED-Lichtquelle (1) zu einem Lichtfleck (L1 , L2) mit zwei gegenüberliegenden vertikalen Hell/Dunkel- Grenzen (4, 6) auf einem Messschirm abgebildet wird. 1. Lighting device for generating a glare-free high-beam function with a number of LED light sources and an optical unit for generating a high beam function, with a sensor device for detecting oncoming and / or driving ahead, with a control device which, depending on sensor data supplied by the sensor device, the LED Light sources by dimming or switching on and off so that a corresponding to the oncoming and / or driving ahead Entblendungsbereich the high beam function is formed to glare the road user, characterized in that the high beam function (F) associated with optical unit a plurality of optical elements ( 2), wherein each for the high beam function (F) provided LED light source (1) is assigned a separate optical element (2), such that each LED light source (1) to a light spot (L1, L2) with two opposite lying vertical bright / dark boundaries (4, 6) is displayed on a screen.
2. Beleuchtungsvorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Optikelement (2) derart ausgebildet ist, dass durch Ansteuerung der LED-Lichtquelle (1) auf dem Messschirm ein rechteckförmiger oder quadratischer Lichtfleck (L1 , L2) abgebildet wird. 2. Lighting device according to claim 1, characterized in that the optical element (2) is designed such that by driving the LED light source (1) on the screen a rectangular or square light spot (L1, L2) is displayed.
3. Beleuchtungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Optikelemente (2) derart ausgebildet sind, dass die durch Ansteuerung der LED-Lichtquelle (1) auf dem Messschirm erzeugten benachbarten Lichtflecken (L1 , L2) in horizontaler Richtung überlappend zueinander angeordnet sind. 3. Lighting device according to claim 1 or 2, characterized in that the optical elements (2) are formed such that the by driving the LED light source (1) generated on the screen adjacent light spots (L1, L2) arranged in the horizontal direction overlapping each other are.
4. Beleuchtungsvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die LED-Lichtquelle (1) durch einen LED-Chip oder durch ein LED-Array gebildet ist, wobei ein auf dem Messschirm abgebildeter Lichtfleck (L2) des LED-Arrays in horizontaler Richtung breiter verläuft als ein Lichtfleck (L1) des LED-Chips. 4. Lighting device according to one of claims 1 to 3, characterized in that the LED light source (1) by an LED chip or through an LED array is formed, wherein an imaged on the screen light spot (L2) of the LED array in the horizontal direction is wider than a light spot (L1) of the LED chip.
5. Beleuchtungsvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die LED-Lichtquellen (1) in einer gemeinsamen Erstre- ckungsebene angeordnet sind und dass die Optikelemente (2) auf unterschiedliche Bereiche der Fernlichtfunktion (F) ausgerichtet sind, wobei Optikelemente (2) zur Erzeugung von Lichtflecken in horizontaler Richtung liegenden Randbereichen der Fernlichtverteilung (F) zu Optikelementen zur Erzeugung von Lichtflecken in einem Mittenbereich der Fernlichtverteilung (F) horizontal versetzt ausgerichtet sind. 5. Lighting device according to one of claims 1 to 4, characterized in that the LED light sources (1) are arranged in a common Erstre- ckungsebene and that the optical elements (2) are aligned with different areas of the high beam function (F), wherein optical elements (2) for generating light spots in horizontally lying edge regions of the high beam distribution (F) to optical elements for generating light spots in a central region of the high beam distribution (F) are aligned horizontally offset.
6. Beleuchtungsvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die LED-Chips (1) und/oder die LED-Arrays (1) dimmbar ansteuerbar sind. 6. Lighting device according to one of claims 1 to 5, characterized in that the LED chips (1) and / or the LED arrays (1) are dimmably controlled.
7. Beleuchtungsvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die LED-Chips (1), die zur Beleuchtung eines durch das Sensorsignal erfassten Objektes im Verkehrsraum ausgewählt sind, derart ansteuerbar sind, dass das Objekt mit wechselnder Beleuchtungsstärke beleuchtet wird zur Erkennung des Objekts als Hindernis. 7. Lighting device according to one of claims 1 to 6, characterized in that the LED chips (1), which are selected for illuminating an object detected in the traffic space by the sensor signal, are controllable such that the object is illuminated with changing illuminance for Detection of the object as an obstacle.
8. Beleuchtungsvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die LED-Chips (1), die zur Beleuchtung eines durch das Sensorsignal erfassten Objektes im Verkehrsraum ausgewählt sind, derart ansteuerbar sind, dass das Objekt mit einer im Vergleich zu benachbarten Bereichen der Lichtverteilung (L) erhöhten Beleuchtungsstärke beleuchtet wird zur Erkennung des Objekts als Hindernis 8. Lighting device according to one of claims 1 to 6, characterized in that the LED chips (1), which are selected for illuminating an object detected in the traffic space by the sensor signal, are controllable such that the object with a compared to adjacent Areas of light distribution (L) increased illuminance is illuminated to detect the object as an obstacle
9. Beleuchtungsvorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Optikelement (2) als ein Reflektor und/oder als eine Linse ausgebildet ist. Beleuchtungsvorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die LED-Lichtquellen (1) und die Optikelemente (2) rei- henförmig und/oder in horizontaler Richtung verlaufend angeordnet sind. 9. Lighting device according to one of claims 1 to 8, characterized in that the optical element (2) is designed as a reflector and / or as a lens. Lighting device according to one of claims 1 to 9, characterized in that the LED light sources (1) and the optical elements (2) are arranged in a row-shaped and / or extending in the horizontal direction.
PCT/EP2011/067386 2010-10-06 2011-10-05 Lighting device for producing a dazzle-free full beam headlight function WO2012045775A1 (en)

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