DE102012004916A1 - Lighting device for use as indicator, brake lights, headlights, tail lights or daytime running lights in motor vehicle, has light source and light sensor arranged on common carrier - Google Patents
Lighting device for use as indicator, brake lights, headlights, tail lights or daytime running lights in motor vehicle, has light source and light sensor arranged on common carrier Download PDFInfo
- Publication number
- DE102012004916A1 DE102012004916A1 DE102012004916A DE102012004916A DE102012004916A1 DE 102012004916 A1 DE102012004916 A1 DE 102012004916A1 DE 102012004916 A DE102012004916 A DE 102012004916A DE 102012004916 A DE102012004916 A DE 102012004916A DE 102012004916 A1 DE102012004916 A1 DE 102012004916A1
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- Germany
- Prior art keywords
- light
- light source
- light sensor
- lighting device
- lights
- 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.)
- Withdrawn
Links
- 230000005855 radiation Effects 0.000 claims abstract description 20
- 238000011156 evaluation Methods 0.000 claims description 18
- 238000005286 illumination Methods 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000023077 detection of light stimulus Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 231100000289 photo-effect Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
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
- B60Q1/0017—Devices integrating an element dedicated to another function
- B60Q1/0023—Devices integrating an element dedicated to another function the element being a sensor, e.g. distance sensor, camera
-
- 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
-
- 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
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
- B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
-
- 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]
- F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel 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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/24—Light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
- F21S43/14—Light emitting diodes [LED]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/236—Light guides characterised by the shape of the light guide
- F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
- G01J1/0422—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using light concentrators, collectors or condensers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J2001/4247—Photometry, e.g. photographic exposure meter using electric radiation detectors for testing lamps or other light sources
Abstract
Description
Die Erfindung betrifft eine Beleuchtungseinrichtung für ein Kraftfahrzeug gemäß dem Oberbegriff des Patentanspruchs 1 und des Patentanspruchs 2.The invention relates to a lighting device for a motor vehicle according to the preamble of
Beleuchtungseinrichtungen für Kraftfahrzeuge sind bekannt. Sie können unter anderem als Blinker, Bremslicht, Abblendlicht, Rücklicht, Tagfahrlicht, Frontscheinwerfer usw. verwendet werden. Dabei werden insbesondere Beleuchtungseinrichtungen mit Leuchtdioden (= LED), z. B. sogenannte LED-Scheinwerfer, immer häufiger verwendet.Lighting devices for motor vehicles are known. They can be used inter alia as turn signals, brake lights, low beam, taillight, daytime running lights, headlights, etc. In particular, lighting devices with light emitting diodes (= LED), z. As so-called LED headlights, used more often.
Leuchtdioden können sowohl bei Auftreten eines Leerlaufes als auch bei einem Kurzschluss, d. h. niederohmig bzw. hochohmig, ausfallen. Weiterhin können Leuchtdioden sowohl niederohmig als auch hochohmig ausfallen, wobei deren Ausfallwahrscheinlichkeit unterschiedliche Werte annehmen kann. Darüber hinaus können Leuchtdioden auch derart ausfallen, dass der resultierende Zustand weder einen Kurzschluss noch einen Leerlauf darstellt, sondern einen im Voraus undefinierbaren Zustand.Light emitting diodes can occur both when an open circuit and during a short circuit, d. H. low impedance or high impedance, fail. Furthermore, light-emitting diodes can be both low-resistance and high-impedance, the probability of their failure assuming different values. In addition, light emitting diodes can also fail such that the resulting state represents neither a short circuit nor an open circuit, but a state that can not be defined in advance.
Zur Ausfallerkennung von Leuchtdioden sind aus dem Stand der Technik mehrere Lösungsansätze bekannt.For failure detection of light emitting diodes several approaches are known from the prior art.
Beispielsweise ist in der
- – Beaufschlagen des Lichtsensors mit Licht des LED-Chips,
- – Auswerten des Signals des Lichtsensors,
- – Überwachen der Funktion des LED-Chips anhand dieser Auswertung,
- Subjecting the light sensor to light from the LED chip,
- Evaluating the signal of the light sensor,
- Monitoring the function of the LED chip on the basis of this evaluation,
Weiterhin ist aus der
Der Erfindung liegt die Aufgabe zu Grunde, eine gegenüber dem Stand der Technik verbesserte Beleuchtungseinrichtung für ein Kraftfahrzeug anzugeben.The invention is based on the object of specifying an improved over the prior art lighting device for a motor vehicle.
Die Aufgabe wird erfindungsgemäß mit einer Beleuchtungseinrichtung gelöst, welche die in Anspruch 1 und Anspruch 2 angegebenen Merkmale aufweist.The object is achieved with a lighting device having the features specified in
Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.
Eine Beleuchtungseinrichtung für ein Kraftfahrzeug umfasst mindestens ein elektrooptisches Leuchtelement, wobei das elektrooptische Leuchtelement aus mindestens einer Lichtquelle und einen der Lichtquelle zugeordneten Lichtsensor gebildet ist.An illumination device for a motor vehicle comprises at least one electro-optical luminous element, wherein the electro-optical luminous element is formed from at least one light source and a light sensor associated with the light source.
Erfindungsgemäß ist in einer ersten Ausführungsform vorgesehen, dass die Lichtquelle und der Lichtsensor auf einem gemeinsamen Träger derart angeordnet sind, dass eine lichtempfindliche Fläche des Lichtsensors um 90 Grad zu einer Hauptabstrahlrichtung der Lichtquelle ausgerichtet ist, so dass ein Teil einer mittels der Lichtquelle emittierten Lichtstrahlung auf die lichtempfindliche Fläche des Lichtsensors trifft.According to the invention, it is provided in a first embodiment that the light source and the light sensor are arranged on a common carrier such that a light-sensitive surface of the light sensor is aligned at 90 degrees to a main emission direction of the light source, so that part of a light radiation emitted by the light source the photosensitive surface of the light sensor strikes.
In einer zweiten Ausführungsform ist erfindungsgemäß ein lichtleitendes Element mit mindestens zwei Auskoppelstellen vorgesehen, wobei mittels einer der Auskoppelstellen ein Teil der emittierten Lichtstrahlung der Lichtquelle auf die lichtempfindliche Fläche des Lichtsensors umlenkbar ist.In a second embodiment, a light-conducting element according to the invention is provided with at least two decoupling points, wherein by means of one of the decoupling points a part of the emitted light radiation of the light source can be deflected onto the photosensitive surface of the light sensor.
Mittels der Beleuchtungseinrichtung gemäß der ersten und der zweiten Ausführungsform ist eine zuverlässige Ausfallerkennung der in dem elektrooptischen Leuchtelement angeordneten Lichtquelle möglich, da mittels des Lichtsensors sowohl hochohmige als auch niederohmige und/oder dazwischen liegende Ausfälle des Leuchtelements, welche beispielsweise anhand von Strom- und/oder Spannungsmessungen nicht ermittelbar sind, erkannt werden können. Die Anordnung des Lichtsensors in unmittelbarer Nähe der Lichtquelle ermöglicht zudem eine Verringerung des Einflusses von Fremdlicht auf die lichtempfindliche Fläche des Lichtsensors. Der gemeinsame Träger kann der Reflektor oder ein mit dem Reflektor verbundener Träger-Chip sein.By means of the illumination device according to the first and the second embodiment, reliable failure detection of the arranged in the electro-optical light source light source is possible because by means of the light sensor both high-impedance and low-impedance and / or intervening failures of the light element, which, for example, based on electricity and / or Voltage measurements can not be determined, can be detected. The arrangement of the light sensor in the immediate vicinity of the light source also allows a reduction in the influence of extraneous light on the photosensitive surface of the light sensor. The common carrier may be the reflector or a carrier chip connected to the reflector.
Dadurch, dass in der Beleuchtungseinrichtung gemäß der ersten Ausführungsform kein zusätzliches Bauteil zur Aufnahme der Lichtstrahlung mittels des Lichtsensors notwendig ist, ist die Beleuchtungseinrichtung zur Ausfallerkennung des Lichtelements besonders kostengünstig herstellbar. Das Lichtleitelement der Beleuchtungseinrichtung gemäß der zweiten Ausführungsform ermöglicht eine optimale Lichteinkopplung in das optische System und ermöglicht damit eine kostengünstige und bauraumsparende Beleuchtungseinrichtung gegenüber Beleuchtungseinrichtungen mit einem aufwendigen optischen Abbildungssystem, welches zur Lichteinkopplung beispielsweise ein Zusatzgehäuse benötigen. Die Positionierung des Lichtsensors zur Lichtquelle kann dementsprechend einfach realisiert werden.Characterized in that in the lighting device according to the first embodiment, no additional component for receiving the light radiation by means of the light sensor is necessary, the illumination device for failure detection of the light element is particularly inexpensive to produce. The light-guiding element of the illumination device according to the second embodiment allows optimum light coupling into the optical system and thus enables a cost-effective and space-saving illumination device compared to lighting devices with a complex optical imaging system, which require, for example, an additional housing for light coupling. The positioning of the light sensor to the light source can be easily realized accordingly.
Ausführungsbeispiele der Erfindung werden im Folgenden anhand von Zeichnungen näher erläutert.Embodiments of the invention are explained in more detail below with reference to drawings.
Dabei zeigen:Showing:
Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided in all figures with the same reference numerals.
Die
Die Beleuchtungseinrichtung
Die Beleuchtungseinrichtung
Zur Emission von Lichtstrahlung L für die Fahrlichtverteilung ist die Lichtquelle
Der der Lichtquelle
Der gemeinsame Träger
Die lichtempfindliche Fläche
Ein Teil der Lichtstrahlung L trifft direkt auf die lichtempfindliche Fläche
Die lichtempfindliche Fläche
Die mittels der Lichtquelle
Das lichtleitende Bauteil
Ein derartig astförmiger Lichtleiter mit zwei Auskoppelstellen
Die lichtempfindliche Fläche
Zur Auswertung des bereits erwähnten Signals des Lichtsensors
Wie im vorliegenden Ausführungsbeispiel dargestellt, ist die Steuer- und Auswerteeinheit
Das elektrooptische Leuchtelement
Weiterhin ist in der Steuerschaltung des elektrooptischen Leuchtelements
Zur Auswertung des gemessenen Stroms weist die Steuer- und Auswerteeinheit
Vorzugsweise können auch mehrere in dem Kraftfahrzeug angeordnete Beleuchtungseinrichtungen
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Beleuchtungseinrichtunglighting device
- 22
- elektrooptisches LeuchtelementElectro-optical luminous element
- 33
- Lichtquellelight source
- 44
- Lichtsensorlight sensor
- 4.14.1
- lichtempfindliche Flächephotosensitive surface
- 55
- gemeinsamer Trägercommon carrier
- 66
- optisches Bauteiloptical component
- 6.16.1
- lichtleitendes Bauteilphotoconductive component
- 6.1.16.1.1
- Auskoppelstellendecoupling points
- 6.1.26.1.2
- Auskoppelstellendecoupling points
- 7 7
- Steuer- und AuswerteeinheitControl and evaluation unit
- LL
- Lichtstrahlunglight radiation
- aa
- Abstanddistance
- ss
- Hauptabstrahlrichtungmain radiation
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102009006250 A1 [0005] DE 102009006250 A1 [0005]
- DE 10248238 A1 [0006] DE 10248238 A1 [0006]
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012004916A DE102012004916A1 (en) | 2012-03-09 | 2012-03-09 | Lighting device for use as indicator, brake lights, headlights, tail lights or daytime running lights in motor vehicle, has light source and light sensor arranged on common carrier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012004916A DE102012004916A1 (en) | 2012-03-09 | 2012-03-09 | Lighting device for use as indicator, brake lights, headlights, tail lights or daytime running lights in motor vehicle, has light source and light sensor arranged on common carrier |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102012004916A1 true DE102012004916A1 (en) | 2012-09-20 |
Family
ID=46756984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102012004916A Withdrawn DE102012004916A1 (en) | 2012-03-09 | 2012-03-09 | Lighting device for use as indicator, brake lights, headlights, tail lights or daytime running lights in motor vehicle, has light source and light sensor arranged on common carrier |
Country Status (1)
Country | Link |
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DE (1) | DE102012004916A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016109901A1 (en) * | 2016-05-30 | 2017-11-30 | Osram Opto Semiconductors Gmbh | light source |
EP3633261A4 (en) * | 2017-05-23 | 2021-04-07 | Koito Manufacturing Co., Ltd. | Vehicle lamp |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10248238A1 (en) | 2002-10-16 | 2004-04-29 | Delphi Technologies, Inc., Troy | Lighting device, in particular for motor vehicles |
DE102009006250A1 (en) | 2009-01-27 | 2009-10-01 | Daimler Ag | Electrooptical illuminating element for use in lighting installation as e.g. turning indicator in motor vehicle, has photosensor attached to LED chip such that part of light of LED chip is projected at photo-sensitive part of photosensor |
-
2012
- 2012-03-09 DE DE102012004916A patent/DE102012004916A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10248238A1 (en) | 2002-10-16 | 2004-04-29 | Delphi Technologies, Inc., Troy | Lighting device, in particular for motor vehicles |
DE102009006250A1 (en) | 2009-01-27 | 2009-10-01 | Daimler Ag | Electrooptical illuminating element for use in lighting installation as e.g. turning indicator in motor vehicle, has photosensor attached to LED chip such that part of light of LED chip is projected at photo-sensitive part of photosensor |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016109901A1 (en) * | 2016-05-30 | 2017-11-30 | Osram Opto Semiconductors Gmbh | light source |
EP3633261A4 (en) * | 2017-05-23 | 2021-04-07 | Koito Manufacturing Co., Ltd. | Vehicle lamp |
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Effective date: 20141001 |