DE102006018575A1 - Error detection of LEDs - Google Patents
Error detection of LEDs Download PDFInfo
- Publication number
- DE102006018575A1 DE102006018575A1 DE102006018575A DE102006018575A DE102006018575A1 DE 102006018575 A1 DE102006018575 A1 DE 102006018575A1 DE 102006018575 A DE102006018575 A DE 102006018575A DE 102006018575 A DE102006018575 A DE 102006018575A DE 102006018575 A1 DE102006018575 A1 DE 102006018575A1
- Authority
- DE
- Germany
- Prior art keywords
- emitting diode
- light
- current
- voltage
- failure
- 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- Withdrawn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
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
- H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
- H05B47/23—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in series
- H05B47/235—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in series with communication between the lamps and a central unit
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
Die Erfindung betrifft eine Betriebsschaltung für eine Leuchtdioden-Anordnung, die eine oder mehrere in Serie geschaltete Leuchtdioden aufweist, zu denen jeweils ein Element parallel geschaltet ist, das bei Unterbrechungsausfall einer Leuchtdiode den Strom durch die Leuchtdiode übernimmt. Dabei ist eine Erfassungseinheit vorgesehen, die dazu ausgelegt ist, einen Unterbrechungsausfall wenigstens einer Leuchtdiode durch Überwachung der zeitlichen Entwicklung des Diodenstroms und der Spannung an der Leuchtdioden-Anordnung zu erkennen.The invention relates to an operating circuit for a light-emitting diode arrangement, which has one or more light-emitting diodes connected in series, to each of which an element is connected in parallel, which takes over the current through the light-emitting diode if a light-emitting diode fails. In this case, a detection unit is provided which is designed to detect an interruption in the failure of at least one light-emitting diode by monitoring the temporal development of the diode current and the voltage on the light-emitting diode arrangement.
Description
Die Erfindung bezieht sich auf das Gebiet der Erkennung eines Ausfalls einer Leuchtdiode.The This invention relates to the field of detecting a failure a light emitting diode.
Leuchtdioden habe den Vorteil einer hohen Lebensdauer, weswegen sie bspw. oft für Notbeleuchtungen eingesetzt werden, die automatisch eingeschaltet werden, wenn eine Netzversorgung für andere Leuchtmittel wie bspw. Gasentladungslampen ausfällt.LEDs have the advantage of a long life, which is why they often, for example for emergency lighting be used automatically, if one Power supply for others Bulbs such as gas discharge lamps fails.
Umso wichtiger ist indessen die Erkennung eine Ausfalls einer Leuchtdiode.more more important, however, is the detection of a failure of a light emitting diode.
Die Erfindung hat zur Aufgabe, eine Möglichkeit zur Erkennung eines Unterbrechungsausfalls wenigstens einer Leuchtdiode anzugeben.The Invention has for its object to provide a way to detect a Indicate interruption failure of at least one light-emitting diode.
Diese Aufgabe wird durch die Merkmale der unabhängigen Ansprüche gelöst. Die abhängigen Ansprüche bilden den zentralen Gedanken der Erfindung in besonders vorteilhafter Weise weiter.These The object is solved by the features of the independent claims. The make dependent claims the central idea of the invention in particularly advantageous Continue.
Gemäss einem ersten Aspekt der Erfindung ist vorgesehen eine Betriebsschaltung für eine Leuchtdioden-Anordnung, die eine oder mehrere in Serie geschaltete Leuchtdioden aufweist, zu denen jeweils ein Element parallel geschaltet ist, das bei Unterbrechungsausfall einer Leuchtdiode den Strom durch die Leuchtdiode übernimmt. Es ist weiterhin eine Erfassungseinheit vorgesehen ist, die dazu ausgelegt ist, einen Unterbrechungsausfall wenigstens einer Leuchtdiode durch Überwachung der zeitlichen Entwicklung des Diodenstroms und der Spannung an der Leuchtdioden-Anordnung zu erkennen.According to one The first aspect of the invention provides an operating circuit for a light-emitting diode arrangement, which has one or more light-emitting diodes connected in series, to each of which an element is connected in parallel, in case of interruption failure a LED takes over the current through the LED. It is also a detection unit is provided, the purpose is designed to interrupt a failure of at least one LED by monitoring the temporal evolution of the diode current and the voltage at the To detect light-emitting diode arrangement.
Die Schaltung kann dazu ausgelegt sein, die Leuchtdioden-Anordnung mit konstanter Leistung zu betrieben. Dabei wird ein Unterbrechungsausfall durch einen Anstieg der Spannung an der Leuchtdioden-Anordnung bei gleichzeitigem Absinken des Strom durch die Leuchtdioden-Anordnung erkannt.The Circuit can be designed to keep the light emitting diode arrangement with a constant Power to operate. This is a disruption failure by an increase in the voltage at the light emitting diode array at the same time Decline of the current detected by the light-emitting diode arrangement.
Die Schaltung kann alternativ dazu ausgelegt sein, die Leuchtdioden-Anordnung mit konstantem Strom zu betreiben. Ein Unterbrechungsausfall wird durch einen Anstieg der Spannung an der Leuchtdioden-Anordnung erkannt wird.The Circuit may alternatively be designed, the light emitting diode array to operate with constant current. An interruption failure will detected by an increase in the voltage across the LED array becomes.
Die Erfassungseinheit kann die Strom- und Spannungsverhältnisse der Leuchtdioden-Anordnung kontinuierlich oder in Abständen erfassen.The Detecting unit can be the current and voltage conditions the light emitting diode array detect continuously or at intervals.
Die Erfassungseinheit kann die erfassten Strom- und Spannungsverhältnisse der Leuchtdioden-Anordnung in einem Speicher ablegen und einen Unterbrechungsausfall wenigstens einer Leuchtdiode durch Vergleich aktueller Werte der Strom- und Spannungsverhältnisse der Leuchtdioden-Anordnung mit wenigstens einem abgespeicherten Wert erfassen.The Detection unit can the detected current and voltage conditions store the light-emitting diode arrangement in a memory and a break in the interruption at least one LED by comparing actual values of the Current and voltage conditions the light-emitting diode array with at least one stored Enter value.
Die Schaltung kann mit einer externen Datenleitung verbunden sei und die Strom- und Spannungsverhältnisse der Leuchtdioden-Anordnung auf eine über die externe Datenleitung eingehende Abfrage hin überprüfen.The Circuit can be connected to an external data line and the current and voltage conditions the light emitting diode array on a via the external data line check incoming query.
Das Ergebnis der extern angeforderten Überprüfung kann über die externe Datenleitung übermittelbar sein.The Result of externally requested verification can be transmitted via the external data line be.
Die Leuchtdioden-Anordnung als Notbeleuchtung ausgebildet sein, die bei Ausfall der Netzversorgung für Hauptleuchtmittel automatisch zugeschaltet wird.The Light-emitting diode arrangement be designed as emergency lighting, the in case of failure of the mains supply for Main illuminant is switched on automatically.
Ein weitere Aspekt der Erfindung bezieht sich auf ein Betriebsverfahren für eine Leuchtdioden-Anordnung, die eine oder mehrere in Serie geschaltete Leuchtdioden aufweist, zu denen jeweils ein Element parallel geschaltet ist, das bei Unterbrechungsausfall einer Leuchtdiode den Strom durch die Leuchtdiode übernimmt. Eine Erfassungseinheit erkennt einen Unterbrechungsausfall wenigstens einer Leuchtdiode durch Überwachung der zeitlichen Entwicklung des Diodenstroms und der Spannung an der Leuchtdioden-Anordnung.One Another aspect of the invention relates to an operating method for one Light-emitting diode arrangement, one or more series-connected Light emitting diodes, to which in each case one element connected in parallel is that in case of failure of a light-emitting diode through the current the LED takes over. A detection unit detects at least one interruption failure a light-emitting diode by monitoring the temporal evolution of the diode current and the voltage at the Light emitting diode array.
Weitere Merkmale, Aspekte und Vorteil der Erfindung sollen nunmehr bezugnehmend auf die Figuren der begleitenden Zeichnungen und die beiliegende Figuren der Zeichnungen erläutert werden.Further Features, aspects and advantage of the invention will now be referring to the figures of the accompanying drawings and the enclosed Figures of the drawings explained become.
In
der
Eine
Steuereinheit
Der
Regler
Die
Steuereinheit
Die
Steuereinheit
Über diese
externe Datenleitung
Grundsätzlich kann
die Steuereinheit
Die
Fehlerüberprüfung zielt
dabei auf die Erfassung eines Unerbrechungsausfalls wenigstens einer
Leuchtdiode
Der
zeitliche Verlauf kann dabei durch eine Auswerteeinheit
Alternativ
kann die zeitliche Ableitung des jeweiligen Parameters ermittelt
werden, was später
im Detail anhand von
Eine Ausfall wird erkannt, wenn die genannte Auswertung eine Abweichung ergibt, die grösser als ein vorgegebener Schwellenwert ist.A Failure is detected if the mentioned evaluation is a deviation that makes bigger is a predetermined threshold.
Insbesondere kann ein Fehler erkannt werden, wenn sich eine zeitliche Veränderung in einem kurzen Zeitraum ergibt. Somit könne bspw. langsamere Temperaturdriften ausgeschlossen werden.Especially An error can be detected if there is a change over time in a short period of time. Thus, for example, slower temperature drifts be excluded.
Die Auswertung kann dabei temperaturkompensiert sein, d.h. es wird die Abhängigkeit der Diodenkennlinien vom Temperaturgang berücksichtigt.The Evaluation may be temperature compensated, i. it will be the dependence the diode characteristics of the temperature response considered.
Insbesondere
kann es sich bei der Leuchtdioden-Anordnung
Bei
Betrieb der Leuchtdioden-Anordnung
Während
In
der
Mittels
eines Kondensators
Die
Ausgangssignale der beiden Komparatoren
Claims (16)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006018575A DE102006018575A1 (en) | 2006-04-21 | 2006-04-21 | Error detection of LEDs |
EP11156563A EP2343954A3 (en) | 2006-04-21 | 2007-04-19 | LED failure detection |
EP07724386.3A EP2014136B1 (en) | 2006-04-21 | 2007-04-19 | Error detection of light-emitting diodes |
PCT/EP2007/003449 WO2007121927A1 (en) | 2006-04-21 | 2007-04-19 | Error detection of light-emitting diodes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006018575A DE102006018575A1 (en) | 2006-04-21 | 2006-04-21 | Error detection of LEDs |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006018575A1 true DE102006018575A1 (en) | 2007-10-25 |
Family
ID=37103158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006018575A Withdrawn DE102006018575A1 (en) | 2006-04-21 | 2006-04-21 | Error detection of LEDs |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP2343954A3 (en) |
DE (1) | DE102006018575A1 (en) |
WO (1) | WO2007121927A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008047731A1 (en) * | 2008-09-18 | 2010-03-25 | Hella Kgaa Hueck & Co. | Lighting device i.e. headlight, failure detecting method for motor vehicle, involves detecting failure of LEDs by determining or evaluating voltage drop of LEDs, where evaluation takes place by comparing voltage drop with reference value |
WO2010034739A1 (en) * | 2008-09-24 | 2010-04-01 | Hella Kgaa Hueck & Co. | Method for operating a series circuit of at least two led’s |
DE102009017989A1 (en) * | 2009-04-21 | 2010-10-28 | Vossloh-Schwabe Optoelectronic Gmbh & Co. Kg | Monitoring device for LED arrangement of lighting system, has detection unit monitoring time response of detected electric variable to detect LED error, where error signal is produced when LED error is present |
DE102009031040A1 (en) * | 2009-06-30 | 2011-01-05 | GM Global Technology Operations, Inc., Detroit | Vehicle indicator, has switch subjecting LED to input voltage, test circuit testing function of LED, control unit controlling switch, and another switch operated by control unit during malfunction of LED |
EP2645529A1 (en) * | 2012-03-29 | 2013-10-02 | DIN-Dietmar Nocker Facilitymanagement GmbH | Circuit assembly and method for testing a light emitting diode branch of a circuit assembly |
EP2296440A3 (en) * | 2009-06-19 | 2015-06-03 | Hella KGaA Hueck & Co. | Method and apparatus for detecting failure of LEDs |
EP3125648A1 (en) * | 2015-07-31 | 2017-02-01 | Siemens Aktiengesellschaft | Light emitting diode control circuit for a signal generator |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2937492B1 (en) * | 2008-10-16 | 2012-05-25 | A R P Signal | LIGHT GENERATING DEVICE AND SIGNALING LIGHT SYSTEM USING SUCH A DEVICE. |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2150372B (en) * | 1983-11-25 | 1986-12-10 | Ferranti Plc | Lamp failure detector |
JP2991893B2 (en) * | 1993-05-31 | 1999-12-20 | 富士通株式会社 | Driving circuit for light emitting element and optical amplification repeater using the same |
DE19602891A1 (en) * | 1996-01-27 | 1997-08-07 | Kammerer Gmbh M | Method and arrangement for adjusting the brightness of a current- or voltage-controlled illuminant for backlighting a display, in particular for motor vehicles |
DE19841490B4 (en) | 1998-09-10 | 2005-06-30 | Infineon Technologies Ag | Circuit arrangement for protecting a series connection of at least two light-emitting diodes before failure |
DE10025821A1 (en) * | 2000-05-25 | 2002-07-25 | Sickinger Monika | LED light source |
US6650064B2 (en) * | 2000-09-29 | 2003-11-18 | Aerospace Optics, Inc. | Fault tolerant led display design |
US6870328B2 (en) * | 2001-12-19 | 2005-03-22 | Toyoda Gosei Co., Ltd. | LED lamp apparatus for vehicles |
CA2391681A1 (en) * | 2002-06-26 | 2003-12-26 | Star Headlight & Lantern Co. Of Canada Ltd. | Solid-state warning light with microprocessor controlled excitation circuit |
US20050001562A1 (en) * | 2003-07-02 | 2005-01-06 | 911Ep, Inc. | LED compensation circuit |
JP4771354B2 (en) * | 2004-09-17 | 2011-09-14 | 株式会社小糸製作所 | Lighting control circuit for vehicular lamp |
-
2006
- 2006-04-21 DE DE102006018575A patent/DE102006018575A1/en not_active Withdrawn
-
2007
- 2007-04-19 WO PCT/EP2007/003449 patent/WO2007121927A1/en active Application Filing
- 2007-04-19 EP EP11156563A patent/EP2343954A3/en not_active Withdrawn
- 2007-04-19 EP EP07724386.3A patent/EP2014136B1/en active Active
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008047731A1 (en) * | 2008-09-18 | 2010-03-25 | Hella Kgaa Hueck & Co. | Lighting device i.e. headlight, failure detecting method for motor vehicle, involves detecting failure of LEDs by determining or evaluating voltage drop of LEDs, where evaluation takes place by comparing voltage drop with reference value |
DE102008047731B4 (en) * | 2008-09-18 | 2020-06-04 | HELLA GmbH & Co. KGaA | Error detection method in a lighting device |
WO2010034739A1 (en) * | 2008-09-24 | 2010-04-01 | Hella Kgaa Hueck & Co. | Method for operating a series circuit of at least two led’s |
DE102009017989A1 (en) * | 2009-04-21 | 2010-10-28 | Vossloh-Schwabe Optoelectronic Gmbh & Co. Kg | Monitoring device for LED arrangement of lighting system, has detection unit monitoring time response of detected electric variable to detect LED error, where error signal is produced when LED error is present |
EP2296440A3 (en) * | 2009-06-19 | 2015-06-03 | Hella KGaA Hueck & Co. | Method and apparatus for detecting failure of LEDs |
DE102009031040A1 (en) * | 2009-06-30 | 2011-01-05 | GM Global Technology Operations, Inc., Detroit | Vehicle indicator, has switch subjecting LED to input voltage, test circuit testing function of LED, control unit controlling switch, and another switch operated by control unit during malfunction of LED |
EP2645529A1 (en) * | 2012-03-29 | 2013-10-02 | DIN-Dietmar Nocker Facilitymanagement GmbH | Circuit assembly and method for testing a light emitting diode branch of a circuit assembly |
EP3125648A1 (en) * | 2015-07-31 | 2017-02-01 | Siemens Aktiengesellschaft | Light emitting diode control circuit for a signal generator |
Also Published As
Publication number | Publication date |
---|---|
EP2014136A1 (en) | 2009-01-14 |
EP2014136B1 (en) | 2013-12-11 |
EP2343954A3 (en) | 2012-06-06 |
EP2343954A2 (en) | 2011-07-13 |
WO2007121927A1 (en) | 2007-11-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8127 | New person/name/address of the applicant |
Owner name: TRIDONIC GMBH & CO KG, DORNBIRN, AT |
|
R012 | Request for examination validly filed |
Effective date: 20130419 |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |