WO2004086822A1 - Motor-vehicle illumination module - Google Patents

Motor-vehicle illumination module Download PDF

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Publication number
WO2004086822A1
WO2004086822A1 PCT/DE2004/000446 DE2004000446W WO2004086822A1 WO 2004086822 A1 WO2004086822 A1 WO 2004086822A1 DE 2004000446 W DE2004000446 W DE 2004000446W WO 2004086822 A1 WO2004086822 A1 WO 2004086822A1
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WO
WIPO (PCT)
Prior art keywords
leds
motor vehicle
light module
vehicle light
electronics
Prior art date
Application number
PCT/DE2004/000446
Other languages
German (de)
French (fr)
Inventor
Gerold Stauss
Original Assignee
sitronic Ges. für elektrotechnische Ausrüstung mbH & Co. KG
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 sitronic Ges. für elektrotechnische Ausrüstung mbH & Co. KG filed Critical sitronic Ges. für elektrotechnische Ausrüstung mbH & Co. KG
Publication of WO2004086822A1 publication Critical patent/WO2004086822A1/en

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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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • 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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/18—Controlling the intensity of the light using temperature feedback
    • 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
    • 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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback

Definitions

  • the invention relates to a motor vehicle lamp with individual LEDs.
  • Such a motor vehicle lamp is known for example from DE 199 43 256 AI.
  • the invention has for its object to improve the function of a motor vehicle lamp.
  • This task is performed by a motor vehicle lamp module with individual LEDs as the illuminant, a base body for holding the LEDs, sensors for detecting external influences and / or internal influences and / or production-related properties of the LEDs and with electronics for controlling and regulating the brightness of the LEDs in Dependency on the detected external and / or internal influences and LED properties as well as with a data storage of the recorded data.
  • the motor vehicle lamp according to the invention can be used for any purpose, i.e. H. can be used for indicators, headlights or the like.
  • a double function of LED groups can also be provided, in that the LEDs for the parking light or the brake light or the like, depending on the control. to care.
  • a regulated individual pulse-width modulated current flow to each individual LED or to several LEDs is generated together, which can compensate for the following influences:
  • the ⁇ C circuit With the help of the ⁇ C circuit, it is also possible to calibrate different LEDs in order to ensure uniform lighting behavior. There is no need to select or group LEDs. The LEDs are better protected by continuously monitoring the external and internal influences and taking appropriate compensation to protect them against failure.
  • the LEDs themselves are monitored for a failure.
  • the electronics include a ⁇ C-based circuit that can be coded with regard to country identification and brightness with regulated PWM current sources (for example a circuit board approx. 2 cm x 8 cm / equipped on one side), a software control circuit via temperature, voltage and current measurement, an SAE / ECE coding through circuit breaker nose or connector coding with 3rd connector pin and intelligent PWM control for LED life optimization and failure management with minimal power loss.
  • the electronics can be accommodated on a printed circuit board which is fixed to the base body in a heat-conducting manner or is accommodated in a separate housing or is designed using MID technology.
  • the complete electronics can be integrated into the vehicle lamp module.
  • the integration of the control in the motor vehicle lamp module results in reduced wiring and assembly.
  • the electronics of a motor vehicle lamp module can be connected to a central control unit via a bus system. This results in further variants of the invention (diagnosis, networking, Bünkgeber, etc.).
  • Fig. 1 is a block diagram of the LED control
  • Fig. 2 is a plan view of a carrier in MID technology (Molded
  • FIG. 3 shows the carrier according to FIG. 2 in a sectional illustration along the line III-III according to FIG. 2.
  • the electronics for LED control are intelligently designed and integrated into the motor vehicle lamp module.
  • the interaction of the electronics with sensors to record several parameters, such as the temperature in the area of the LEDs (temperature monitoring), the brightness of an LED, the contamination of the lamp cover and environmental factors (rain, fog or darkness) can regulate and control the brightness of each one LED done.
  • temperature monitoring temperature monitoring
  • the brightness of an LED the contamination of the lamp cover
  • environmental factors rain, fog or darkness
  • a permanent lighting or a turn signal can be switched on automatically.
  • the control, regulation and error monitoring of LEDs 1 by means of a ⁇ C circuit 2 is shown in FIG. 1.
  • the LED current 3 is regulated and recorded.
  • the LEDs 1 are pulse-width modulated digital controlled nd n supplied with current II to I 2.
  • the ⁇ C circuit 2 is connected to a power supply 4 via the vehicle electrical system 5 and a data memory 6 for characteristic curves of the LEDs 1.
  • Operating voltage 7, country code 8, electronics temperature 9, LED temperature 10 and further sensors 11 for the outside temperature or other external influences are detected and evaluated by the ⁇ C circuit 2, so that a current flow I n as a function of the operating voltage measurement 7, the country code 8 , the electronics temperature 9 and the LED temperature 10 and other influences 11 is given to the LEDs 1.
  • Data communication takes place between the ⁇ C circuit 2 and the motor vehicle on-board data network 13 by means of an interface 12.
  • FIGS. 2 and 3 how the electronic circuit according to the invention can be integrated into a carrier 17, for example using MID technology, in order to achieve an optimal adaptation of electronics, carrier, cooling, lamps and connection technology to the space available in a motor vehicle.
  • a group of LEDs 1 is located on the carrier 17 and can be controlled by the electronic control depending on the function.
  • Analogous to the LEDs, the ⁇ C controller and power components can also be mounted on the carrier 17.
  • the individual conductor tracks and further electronic components are not shown in FIGS. 2 and 3.
  • the geometry of the carrier 17 is exemplary and can take almost any shape. Slots (above-mentioned thermal flow paths) 14 conduct heat when using MID technology via surface transport downwards in the direction of the cooling fins 15. Further electrical or electronic connections are implemented by means of the integrated plug 16.
  • REFERENCE NUMBERS REFERENCE NUMBERS

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

The invention relates to a motor-vehicle illumination module comprising individual LEDs (1) as the illumination means, a base body for housing the LEDs (1), sensors for detecting external influences and/or internal influences and/or characteristics caused by the production process, an electronic system for controlling and regulating the light intensity of the LEDs (1) in accordance with the recorded external and/or internal influences and characteristics of the LEDs, in addition to a data memory (6) for the recorded data.

Description

B E SC H R E I B U N G DESCRIPTION
KraftfahrzeugleuchtenmodulAutomotive lamp module
Die Erfindung betrifft eine Kraftfahrzeugleuchte mit einzelnen LEDs.The invention relates to a motor vehicle lamp with individual LEDs.
Ein derartige Kraftfahrzeugleuchte ist beispielsweise durch die DE 199 43 256 AI bekannt geworden.Such a motor vehicle lamp is known for example from DE 199 43 256 AI.
Der Erfindung liegt die Aufgabe zugrunde, die Funktion ein er Kraftfahrzeugleuchte zu verbessern.The invention has for its object to improve the function of a motor vehicle lamp.
Diese Aufgabe wird durch ein Kraftfahrzeugleuchtenmodul mit einzelnen LEDs als Leuchtmittel, einem Basiskörper zur Halterung der LEDs, Sensoren zur Erfassung äußerer Einflüsse und/oder innerer Einflüsse und/oder fertigungstechnisch bedingter Eigenschaften der LEDs und mit einer Elektronik zur Steuerung und Regelung der Helligkeit der LEDs in Abhängigkeit von den erfassten äußeren und/oder inneren Einflüssen und LED-Eigenschaften sowie mit einem Datenspeicher der erfassten Daten gelöst. Die erfindungsgemäße Kraftfahrzeugleuchte kann für jedwede Zwecke, d. h. für Blinker, Scheinwerfer oder dergleichen verwendet werden. Es kann auch eine Doppelfunktion von LED-Gruppen vorgesehen sein, indem die LEDs je nach Ansteuerung für das Standlicht oder das Bremslicht o.a. sorgen.This task is performed by a motor vehicle lamp module with individual LEDs as the illuminant, a base body for holding the LEDs, sensors for detecting external influences and / or internal influences and / or production-related properties of the LEDs and with electronics for controlling and regulating the brightness of the LEDs in Dependency on the detected external and / or internal influences and LED properties as well as with a data storage of the recorded data. The motor vehicle lamp according to the invention can be used for any purpose, i.e. H. can be used for indicators, headlights or the like. A double function of LED groups can also be provided, in that the LEDs for the parking light or the brake light or the like, depending on the control. to care.
Mit Hilfe einer μC-Schaltung wird ein geregelter individueller pulsweiten modulierter Stromfluss an jede einzelne LED oder an mehreren LEDs gemeinsam erzeugt, welcher folgende Einflüsse kompensieren kann:With the help of a μC circuit, a regulated individual pulse-width modulated current flow to each individual LED or to several LEDs is generated together, which can compensate for the following influences:
1. externe Einflüsse wie Umgebungstemperatur und Änderungen der1. external influences such as ambient temperature and changes in
Betriebsspannung, usw.; 2. interne Einflüsse wie Eigenerwärmung der LEDs, usw.;Operating voltage, etc .; 2. internal influences such as self-heating of the LEDs, etc .;
3. fertigungstechnisch bedingte Eigenschaften, Gegebenheiten oder Voraussetzungen wie chargenbedingte Unterschiede bezüglich stromabhängiger Helligkeit, Temperaturabhängigkeit, Durchlassspannungen, und Kennlinien usw.3. Manufacturing-related properties, conditions or requirements such as batch-related differences with regard to current-dependent brightness, temperature dependency, forward voltages and characteristic curves etc.
Mit Hilfe der μC-Schaltung wird somit auch eine Kalibrierung unterschiedlicher LEDs möglich, um ein einheitliches Leuchtverhalten zu gewährleisten. Eine Selektion oder Gruppierung von LEDs kann entfallen. Die LEDs werden besser geschützt, indem die äußeren und inneren Einflüsse laufend überwacht werden und entsprechende Kompensation zum Schutz vor einem Ausfall getroffen werden.With the help of the μC circuit, it is also possible to calibrate different LEDs in order to ensure uniform lighting behavior. There is no need to select or group LEDs. The LEDs are better protected by continuously monitoring the external and internal influences and taking appropriate compensation to protect them against failure.
Die LEDs werden hinsichtlich eines Ausfalls selbst überwacht. Die Elektronik umfasst eine μC-basierende, hinsichtlich .Länderkennung und Helligkeit kodierbare Schaltung mit geregelten PWM-Stromquellen (beispielsweise eine Leiterplatte ca. 2cm x 8cm / einseitig bestückt), einen Software- Regelkreis über Temperatur-, Spannungs- und Strommessung, eine SAE/ECE Kodierung durch Leiterplatten-Brechnase bzw. Steckerkodierung mit 3. Steckerpin und eine intelligente PWM-Regelung für eine LED- Lebensdaueroptimierung und ein Ausfallmanagement mit minimaler Verlustleistung.The LEDs themselves are monitored for a failure. The electronics include a μC-based circuit that can be coded with regard to country identification and brightness with regulated PWM current sources (for example a circuit board approx. 2 cm x 8 cm / equipped on one side), a software control circuit via temperature, voltage and current measurement, an SAE / ECE coding through circuit breaker nose or connector coding with 3rd connector pin and intelligent PWM control for LED life optimization and failure management with minimal power loss.
Die Elektronik kann auf einer Leiterplatte untergebracht sein, welche an dem Basiskörper wärmeleitend fixiert oder in einem separatem Gehäuse untergebracht oder in MID-Technik ausgebildet ist. Die komplette Elektronik kann in das Kraftfahrzeugleuchtenmodul integriert werden. Durch die Integration der Steuerung in das Kraftfahrzeugleuchtenmodul ergibt sich eine reduzierte Verkabelung und Montage. Die Elektronik eines Kraftfahrzeugleuchtenmoduls kann über ein Bussystem mit einer zentralen Steuereinheit verbunden sein. Daraus ergeben sich weitere Varianten der Erfindung (Diagnose, Vernetzung, Bünkgeber, etc.).The electronics can be accommodated on a printed circuit board which is fixed to the base body in a heat-conducting manner or is accommodated in a separate housing or is designed using MID technology. The complete electronics can be integrated into the vehicle lamp module. The integration of the control in the motor vehicle lamp module results in reduced wiring and assembly. The electronics of a motor vehicle lamp module can be connected to a central control unit via a bus system. This results in further variants of the invention (diagnosis, networking, Bünkgeber, etc.).
Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Mit Bezug zu den Figuren der Zeichnung wird das Ausführungsbeispiel nachfolgend erläutert. Es zeigt:A preferred embodiment of the invention is shown in the drawing. The exemplary embodiment is explained below with reference to the figures of the drawing. It shows:
Fig. 1 ein Blockschaltbild der LED-Steuerung;Fig. 1 is a block diagram of the LED control;
Fig. 2 eine Draufsicht eines Trägers in MID-Technik (MoldedFig. 2 is a plan view of a carrier in MID technology (Molded
Interconnection Device);Interconnection device);
Fig. 3 den Träger nach Fig. 2 in einer Schnittdarstellung längs der Linie III-III nach Fig. 2.3 shows the carrier according to FIG. 2 in a sectional illustration along the line III-III according to FIG. 2.
Die Elektronik zur LED-Steuerung ist als wesentliches Merkmal der Erfindung intelligent ausgebildet und in das Kraftfahrzeugleuchtenmodul integriert. Durch das Zusammenwirken der Elektronik mit Sensoren zur Erfassung mehrerer Parameter, wie die Temperatur im Bereich der LEDs (Temperaturüberwachung), die Helligkeit einer LED, die Verschmutzung der Leuchtmittelabdeckung und Umweltfaktoren (Regen, Nebel oder Dunkelheit) kann eine Regelung und Ansteuerung der Helligkeit jeder einzelnen LED erfolgen. Daraus folgt mit Hilfe des Regelkreises ein lernfähiges, selbstregulierendes, anpassungsfähiges System eines intelligenten Leuchtmittels für ein Kraftfahrzeug, das eine selbsttätige Regelung der Helligkeit des Leuchtmittels in Abhängigkeit der erfassten Parameter vornimmt. Es kann automatisch eine Einschaltung einer Dauerbeleuchtung oder eines Blinkers erreicht werden. Die Steuerung, Regelung und Fehlerüberwachung von LEDs 1 mittels einer μC-Schaltung 2 ist in der Fig. 1 gezeigt. Der LED-Strom 3 wird geregelt und erfasst. Die LEDs 1 werden pulsweitenmoduliert digital angesteuert u nd mit Strom I I2 bis In versorgt. Die μC-Schaltung 2 ist mit einer Stromversorgung 4 über das Bordnetz 5 des KfZ und einem Datenspeicher 6 für Kennlinien der LEDs 1 verbunden. Betriebsspannung 7, Länderkennung 8, Elektroniktemperatur 9, LED-Temperatur 10 und weitere Sensoren 11 für die Außentemperatur oder andere äußere Einflüsse werden von der μC-Schaltung 2 erfasst und ausgewertet, so dass ein Stromfluss In als Funktion der Betriebsspannungsmessung 7, der Länderkennung 8, der Elektroniktemperatur 9 und der LED-Temperatur 10 und sonstige Einflüsse 11 an die LEDs 1 abgegeben wird. Es findet eine Datenkommunikation zwischen der μC-Schaltung 2 und dem KfZ-Borddateπnetz 13 mittels einer Schnittstelle 12 statt.As an essential feature of the invention, the electronics for LED control are intelligently designed and integrated into the motor vehicle lamp module. The interaction of the electronics with sensors to record several parameters, such as the temperature in the area of the LEDs (temperature monitoring), the brightness of an LED, the contamination of the lamp cover and environmental factors (rain, fog or darkness) can regulate and control the brightness of each one LED done. With the help of the control loop, this results in a learnable, self-regulating, adaptable system of an intelligent lamp for a motor vehicle, which automatically controls the brightness of the lamp as a function of the detected parameters. A permanent lighting or a turn signal can be switched on automatically. The control, regulation and error monitoring of LEDs 1 by means of a μC circuit 2 is shown in FIG. 1. The LED current 3 is regulated and recorded. The LEDs 1 are pulse-width modulated digital controlled nd n supplied with current II to I 2. The μC circuit 2 is connected to a power supply 4 via the vehicle electrical system 5 and a data memory 6 for characteristic curves of the LEDs 1. Operating voltage 7, country code 8, electronics temperature 9, LED temperature 10 and further sensors 11 for the outside temperature or other external influences are detected and evaluated by the μC circuit 2, so that a current flow I n as a function of the operating voltage measurement 7, the country code 8 , the electronics temperature 9 and the LED temperature 10 and other influences 11 is given to the LEDs 1. Data communication takes place between the μC circuit 2 and the motor vehicle on-board data network 13 by means of an interface 12.
Aus den Figuren 2 und 3 ist ersichtlich, wie die erfindungsgemäße elektronische Schaltung in einen Träger 17 z.B. in MID-Technik integriert werden kann, um eine optimale Anpassung von Elektronik, Träger, Kühlung, Leuchtmittel und Verbindungstechnik an Bauraumgegebenheiten eines KFZ zu erreichen. Eine Gruppe von LEDs 1 befindet sich auf dem Träger 17 und kann mittels der elektronische Steuerung je nach Funktion angesteuert werden. Analog zu den LEDs können auf dem Träger 17 auch der μC- Controller und Leistungsbauelemente montiert sein. Die einzelnen Leiterbahnen und weitere elektronischen Bauelemente sind in der Figur 2 und 3 nicht gezeigt. Die Geometrie des Trägers 17 ist beispielhaft und kann nahezu jede Gestalt annehmen. Schlitze (o.a. ausgeführte thermische Strömungspfade) 14 leiten Wärme bei Einsatz von MID-Technik über Oberflächentransport nach unten in Richtung der Kühlrippen 15. Weitere elektrische oder elektronische Anschlüsse werden mittels des integrierten Steckers 16 realisiert. BEZUGSZEICHENIt can be seen from FIGS. 2 and 3 how the electronic circuit according to the invention can be integrated into a carrier 17, for example using MID technology, in order to achieve an optimal adaptation of electronics, carrier, cooling, lamps and connection technology to the space available in a motor vehicle. A group of LEDs 1 is located on the carrier 17 and can be controlled by the electronic control depending on the function. Analogous to the LEDs, the μC controller and power components can also be mounted on the carrier 17. The individual conductor tracks and further electronic components are not shown in FIGS. 2 and 3. The geometry of the carrier 17 is exemplary and can take almost any shape. Slots (above-mentioned thermal flow paths) 14 conduct heat when using MID technology via surface transport downwards in the direction of the cooling fins 15. Further electrical or electronic connections are implemented by means of the integrated plug 16. REFERENCE NUMBERS
LED μC-Schaltung LED-Strom Stromversorgung Bordnetz Datenspeicher Betriebsspannungsmessung Länderkennung Elektroniktemperatur LED-Temperatur Temperatursensor Schnittstelle Bordnetzdatenbus Thermischer Strömungspfad (z.B. Schlitz) Kühlrippe Stecker Träger LED μC circuit LED current Power supply on-board electrical system Data storage Operating voltage measurement Country code Electronic temperature LED temperature Temperature sensor Interface on-board electrical system data bus Thermal flow path (e.g. slot) Cooling fin connector Carrier

Claims

PATENTANSPRÜCHE
1. Kraftfahrzeugleuchtenmodul mit1. Motor vehicle light module with
einzelnen LEDs (1) als Leuchtmittel; einem Basiskörper (17) zur Halterung der LEDs (1);individual LEDs (1) as illuminants; a base body (17) for holding the LEDs (1);
Sensoren (7 bis 11) zur Erfassung äußerer und/oder innererSensors (7 to 11) for detecting outer and / or inner
Einflüsse beim Betrieb der LEDs (1) und/oder fertigungstechnisch bedingter Eigenschaften der LEDs (1) einem Datenspeicher (6) der erfassten Daten (6); einer Elektronik zur Steuerung und Regelung der LEDs (1) inInfluences during the operation of the LEDs (1) and / or production-related properties of the LEDs (1) in a data memory (6) of the recorded data (6); electronics for controlling and regulating the LEDs (1) in
Abhängigkeit von den erfassten Einflüssen und/oder Eigenschaften .Dependence on the recorded influences and / or properties.
2. Kraftfahrzeugleuchtenmodul nach Anspruch 1, dadurch gekennzeichnet, dass die Elektronik auf einer Leiterplatte untergebracht ist, welche an dem Basiskörper fixiert ist.2. Motor vehicle light module according to claim 1, characterized in that the electronics are housed on a circuit board which is fixed to the base body.
3. Kraftfahrzeugleuchtenmodul nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Elektronik eines Kraftfahrzeugleuchteπmoduls über ein Bussystem mit einer zentralen Steuereinheit verbunden ist.3. Motor vehicle light module according to claim 1 or 2, characterized in that the electronics of a motor vehicle light module are connected to a central control unit via a bus system.
4. Kraftfahrzeugleuchtenmodul nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die LEDs (1) und die Leiterplatte thermisch leitend mit dem Basiskörper als Kühlkörper verbunden sind.4. Motor vehicle light module according to one of the preceding claims, characterized in that the LEDs (1) and the circuit board are thermally conductively connected to the base body as a heat sink.
5. Kraftfahrzeugleuchtenmodul nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass Teile des Kraftfahrzeugleuchtenmoduls in MID-Technik gefertigt sind. 5. Motor vehicle light module according to one of the preceding claims, characterized in that parts of the motor vehicle light module are manufactured using MID technology.
PCT/DE2004/000446 2003-03-25 2004-03-06 Motor-vehicle illumination module WO2004086822A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10313246.5 2003-03-25
DE10313246A DE10313246A1 (en) 2003-03-25 2003-03-25 Automotive lamp module

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Publication Number Publication Date
WO2004086822A1 true WO2004086822A1 (en) 2004-10-07

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