WO1998002020A1 - Circuit for signal transmitters with leds - Google Patents

Circuit for signal transmitters with leds Download PDF

Info

Publication number
WO1998002020A1
WO1998002020A1 PCT/DE1997/001434 DE9701434W WO9802020A1 WO 1998002020 A1 WO1998002020 A1 WO 1998002020A1 DE 9701434 W DE9701434 W DE 9701434W WO 9802020 A1 WO9802020 A1 WO 9802020A1
Authority
WO
WIPO (PCT)
Prior art keywords
leds
group
circuit arrangement
circuit
arrangement according
Prior art date
Application number
PCT/DE1997/001434
Other languages
German (de)
French (fr)
Inventor
Holger RÖSSNER
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to BR9710151A priority Critical patent/BR9710151A/en
Priority to EP97931711A priority patent/EP0910934B1/en
Priority to JP50465598A priority patent/JP2001524249A/en
Priority to DE59706017T priority patent/DE59706017D1/en
Publication of WO1998002020A1 publication Critical patent/WO1998002020A1/en
Priority to US09/227,672 priority patent/US6069452A/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights
    • 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
    • H05B45/42—Antiparallel configurations
    • 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
    • H05B45/59—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits for reducing or suppressing flicker or glow effects
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like

Definitions

  • the invention relates to a circuit arrangement for signal transmitters with light-emitting diodes (LEDs) for emitting colored light, according to the preamble of claim 1. It relates in particular to such a circuit arrangement for signal transmitters in road traffic signal systems.
  • LEDs light-emitting diodes
  • a conventional light bulb has been used in traffic signal systems or traffic lights to generate colored light, in front of which a colored filter plate is arranged.
  • the reflection of light sources acting on it can cause the colored filter plate of a switched-off traffic light to light up and it is not clear whether the corresponding signal is switched on or off.
  • Another disadvantage with the use of light bulbs is that they emit light in a broadband radiation spectrum and only a small percentage is filtered out in the desired color and therefore only a fraction of the energy used is used.
  • LEDs Light Emitting Diode
  • the LEDs produce almost monochrome light in the desired color and therefore do not require any filters which can cause the deceptive reflection described above.
  • LEDs almost 100% of the energy generated is converted into light of the desired color.
  • the use of LEDs, which are also known as luminescent diodes, in traffic light systems has so far only been used in prototypes and still has a number of problems.
  • the LEDs are operated with a ballast, which contains a power supply, possibly a controller and possibly a pulse generator for pulse operation of the LEDs.
  • the problem here is that the components used in the ballasts in accordance with DIN 0832 do not contain any exclusions of errors.
  • ballasts can therefore not be regarded as an intrinsically safe assembly. For this reason and since the ballasts are so complex overall that internal monitoring can no longer be carried out reliably, a sensory measurement or monitoring, in particular of a blocking signal, must be carried out. In traffic light systems, a red light is usually used as a blocking signal. Such complex ballasts, which also require failure detection, can only be produced at high costs.
  • the invention is based on the invention of creating a circuit arrangement for signal transmitters with LEDs for emitting colored light, which enables simple construction, reliable function and reliable monitoring.
  • This task is accomplished by a circuit arrangement with the
  • the LEDs are arranged in a circuit which is supplied with an alternating voltage and in which at least one bridge rectifier is arranged, through which the LEDs are controlled.
  • the LEDs are operated antiparallel on an AC voltage via a series resistor.
  • Each LED only lights up for half a period, which could lead to a noticeable flicker at a mains frequency.
  • this effect is avoided by the anti-parallel connection of the groups of LEDs. This means that there are virtually no dark periods for the entire module.
  • error exclusions can be claimed according to DIN 0832.
  • the first group of LEDs is preferably the same size as the second group of LEDs. This means that half the number of LEDs used in the circuit arrangement is operated antiparallel to the remaining LEDs of the circuit arrangement, so that the same number of LEDs lights up in both half-periods of the AC voltage.
  • the AC voltage is preferably generated by a transformer that transforms a mains voltage of 220 V down to a supply voltage between 10 and 40 V. An error exclusion according to DIN 0832 can also be claimed for the transformer.
  • the AC voltage is also favorable insofar as the advantages of pulse operation can also be claimed, since the half-wave of a sinusoidal AC voltage can lead to effects similar to those of a rectangular pulse. This is advantageous because a higher luminous efficacy can be achieved when the LEDs are operated in pulses than when operating in direct current.
  • the measure that two antiparallel operated LEDs are combined in one housing advantageously means that the number of components is reduced.
  • a jumping of light points is also advantageously reduced, since the LEDs of the same color emit are so close together that they appear to the outside like a luminous point. The remaining one
  • MULTILEDS can be used for this purpose (MULTILED is a registered trademark of Siemens AG).
  • each of the two groups of LEDs consists of a plurality of electrical strings connected in parallel, each of which has a plurality of LEDs connected in series. These electrical strands are still connected to each other at all connection points of the individual LEDs. Overall, this results in a grid or array and, as a result of this and also because of the parallel connection of different electrical LED strings, can be classified as multiple redundant.
  • a diffusing screen is attached in front of the LEDs, by means of which a flickering that may be recognizable to the viewer due to light points that jump back and forth is avoided, since the diffusing screen makes it impossible for the viewer to locate the visible light.
  • FIGS. 1 and 2 Show it Figure 1 is a schematic representation of the performance example and Figure 2 is a schematic representation of an LED housing.
  • a secondary-side circuit 1 a transformer 2, a series resistor 3, twelve LEDs 4 to 15 and cross connections 16 and 17 are shown.
  • a total of six LEDs 4 to 9 and six LEDs 10 to 15 form a first and a second group of LEDs which are connected antiparallel to one another, that is to say the LEDs 4 to 9 of the first group lie opposite to one another in the circuit with regard to their forward direction, like LEDs 10 to 15 of the second group.
  • Each group consists of several strings 18, 19, 20, 21 connected in parallel and LEDs connected in the same direction of passage.
  • the LEDs 4, 5 and 6 form a strand 18 of the first group and are connected antiparallel to the strand 19 with the LEDs 10, 11 and 12 of the second group.
  • the individual strands 18, 19, 20, 21 are also connected to one another by electrical cross connections 16 and 17 between connection points of the individual LEDs of a strand 18, 19, 20, 21 and thus form an array or a matrix.
  • Each connection point between two LEDs of a strand 18, 19, 20, 21 is preferably connected to exactly one connection point between two LEDs of each other strand by such cross connections.
  • two strands connected antiparallel to each other only have cross connections with one another and the strand pairs formed in this way are only connected in parallel with one another and have no cross connections.
  • One group of LEDs is driven by one half-wave of the alternating current and the other group by the other half-wave.
  • LEDs 4 and 12, 5 and 11 and 9 and 13 When using components that each combine two LEDs in an LED housing, such as in a MULTILED SMD housing 22 (FIG. 2) (registered trademark of Siemens AG), LEDs 4 and 12, 5 and 11 and 9 and 13 combined to form a component with two chips of the same color.
  • the circuit 1 is supplied by the transformer 2 with an alternating voltage of 10 to 40 V for the operation of the LEDs 4 to 15.
  • the primary-side 220 V alternating current of the voltage supply is therefore outside the LED circuit arrangement.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)

Abstract

This invention concerns a circuit for signal transmitters in traffic control systems with LEDs (4 to 15) for emitting colored light. Said circuit is supplied with a.c. voltage and has two groups of LEDs (4 to 9 and 10 to 15), which are connected antiparallel to one another. This creates a simple and easy to monitor inherently safe system for signal transmission.

Description

BesehreibungDescription
Schaltungsanordnung für Signalgeber mit LeuchtdiodenCircuit arrangement for signal transmitters with light emitting diodes
Die Erfindung betrifft eine Schaltungsanordnung für Signalgeber mit Leuchtdioden (LEDs) zum Aussenden von farbigem Licht, gemäß dem Oberbegriff des Patentanspruches 1. Sie bezieht sich insbesondere auf eine derartige Schaltungsanordnung für Signalgeber in Straßenverkehrssignalanlagen.The invention relates to a circuit arrangement for signal transmitters with light-emitting diodes (LEDs) for emitting colored light, according to the preamble of claim 1. It relates in particular to such a circuit arrangement for signal transmitters in road traffic signal systems.
Bisher wurde in Straßenverkehrsignalanlagen oder Ampeln zur Erzeugung von farbigem Licht eine übliche Glühbirne eingesetzt, vor der eine farbige Filterplatte angeordnet wird. Dabei kann es jedoch durch Reflexion von einwirkenden Licht- quellen dazu kommen, daß die farbige Filterplatte einer ausgeschalteten Ampel leuchtet und es nicht deutlich ist, ob das entsprechende Signal an- oder ausgeschaltet ist. Ein weiterer Nachteil bei der Verwendung von Glühbirnen besteht darin, daß diese Licht in einem breitbandigem Strahlungsspektrum abgeben und nur ein kleiner Prozentsatz in der gewünschten Farbe herausgefiltert und dadurch nur ein Bruchteil der eingesetzten Energie genutzt wird.So far, a conventional light bulb has been used in traffic signal systems or traffic lights to generate colored light, in front of which a colored filter plate is arranged. In this case, however, the reflection of light sources acting on it can cause the colored filter plate of a switched-off traffic light to light up and it is not clear whether the corresponding signal is switched on or off. Another disadvantage with the use of light bulbs is that they emit light in a broadband radiation spectrum and only a small percentage is filtered out in the desired color and therefore only a fraction of the energy used is used.
Diese Nachteile werden durch die Verwendung von LEDs (Light Emitting Diode) als Strahlungsquelle behoben, da die LEDs nahezu monochromes Licht in der gewünschten Farbe produzieren und daher keine Filter benötigen, die die oben beschriebene täuschende Reflexion verursachen können. Außerdem wird bei Verwendung von LEDs fast 100 % der erzeugten Energie in Licht der gewünschten Farbe umgesetzt. Der Einsatz von LEDs, die auch als Lumineszenzdioden bekannt sind, in Ampelanlagen erfolgt bisher nur in Prototypen und ist noch mit einer Reihe von Problemen behaftet. Die LEDs werden hierbei mit einem Vorschaltgerät betrieben, welches ein Netzteil, eventuell einen Regler sowie unter Umständen einen Impulsgenerator zum Pulsbetrieb der LEDs beinhaltet. Problematisch ist dabei, daß die in den Vorschaltgeräten verwendeten Bauteile entsprechend der DIN 0832 keine Fehlerauε- schlüsse beinhalten. Die Vorschaltgeräte können daher nicht als eigensichere Baugruppe angesehen werden. Aus diesem Grund und da die Vorschaltgeräte insgesamt so komplex sind, daß eine interne Überwachung nicht mehr sicher durchgeführt werden kann, muß eine sensorische Messung oder Überwachung insbesondere eines Sperrsignals durchgeführt werden. Bei Ampelanlagen wird üblicherweise ein rotes Licht als Sperrsignal verwendet. Derartige komplexe Vorschaltgeräte, die zusätzlich eine Ausfallerkennung benötigen, sind auch nur mit hohen Kosten produzierbar .These disadvantages are remedied by using LEDs (Light Emitting Diode) as the radiation source, since the LEDs produce almost monochrome light in the desired color and therefore do not require any filters which can cause the deceptive reflection described above. In addition, when using LEDs, almost 100% of the energy generated is converted into light of the desired color. The use of LEDs, which are also known as luminescent diodes, in traffic light systems has so far only been used in prototypes and still has a number of problems. The LEDs are operated with a ballast, which contains a power supply, possibly a controller and possibly a pulse generator for pulse operation of the LEDs. The problem here is that the components used in the ballasts in accordance with DIN 0832 do not contain any exclusions of errors. The ballasts can therefore not be regarded as an intrinsically safe assembly. For this reason and since the ballasts are so complex overall that internal monitoring can no longer be carried out reliably, a sensory measurement or monitoring, in particular of a blocking signal, must be carried out. In traffic light systems, a red light is usually used as a blocking signal. Such complex ballasts, which also require failure detection, can only be produced at high costs.
Der Erfindung liegt die u f g a e zugrunde, eine Schal- tungsanordnung für Signalgeber mit LEDs zum Aussenden von farbigem Licht zu schaffen, die einen einfachen Aufbau, eine sichere Funktion und eine sichere Überwachung ermöglicht.The invention is based on the invention of creating a circuit arrangement for signal transmitters with LEDs for emitting colored light, which enables simple construction, reliable function and reliable monitoring.
Diese Aufgabe wird durch eine Schaltungsanordnung mit denThis task is accomplished by a circuit arrangement with the
Merkmalen des Anspruches 1 gelöst. Vorteilhafte Weiterbildungen der erfindungsgemäßen Schaltungsanordnung sind Gegenstand der Unteransprüche 2 bis 6.Features of claim 1 solved. Advantageous developments of the circuit arrangement according to the invention are the subject of subclaims 2 to 6.
Erfindungsgemäß ist vorgesehen, daß bei der Schaltungsanordnung der eingangs genannten Art jeweils eine LED der ersten Gruppe mit einer zu dieser antiparallel betriebenen LED der zweiten Gruppe in einem Gehäuse zusammengefaßt sind und mindestens ein Verbindungspunkt zwischen zwei LEDs der ersten Gruppe mit mindestens einem Verbindungspunkt zwischen zwei LEDs der zweiten Gruppe durch eine Querverbindungsleitung verbunden ist.According to the invention it is provided that in the circuit arrangement of the type mentioned at the outset one LED each Group with an LED of the second group which is operated antiparallel to this are combined in a housing and at least one connection point between two LEDs of the first group is connected to at least one connection point between two LEDs of the second group by a cross-connection line.
Gemäß einer alternativen Lösung, die insbesondere dann zur Anwendung kommt, wenn die LEDs nur geringe Sperrspannung zu- lassen, sind die LEDs in einem Stromkreis angeordnet, der mit einer WechselSpannung versorgt ist, und in welchem mindestens ein Brückengleichrichter angeordnet ist, durch den die LEDs angesteuert sind.According to an alternative solution, which is used in particular when the LEDs only allow a low reverse voltage, the LEDs are arranged in a circuit which is supplied with an alternating voltage and in which at least one bridge rectifier is arranged, through which the LEDs are controlled.
Nach einem Grundgedanken der Erfindung werden die LEDs anti- parallel an einer WechselSpannung über einen Vorwiderstand betrieben. Jede LED leuchtet zwar nur für eine halbe Periode, was zu einem erkennbaren Flackern mit einer Netzfrequenz führen könnte. Dieser Effekt wird jedoch durch die antiparallele Schaltung der Gruppen der LEDs vermieden. Damit gibt es für das Gesamtmodul so gut wie keine Dunkelzeiten. Für die alternativ benötigten Bauteile, wie z.B. den Brückengleichrichter, können nach der DIN 0832 Fehlerausschlüsse geltend gemacht werden .According to a basic idea of the invention, the LEDs are operated antiparallel on an AC voltage via a series resistor. Each LED only lights up for half a period, which could lead to a noticeable flicker at a mains frequency. However, this effect is avoided by the anti-parallel connection of the groups of LEDs. This means that there are virtually no dark periods for the entire module. For the alternatively required components, e.g. the bridge rectifier, error exclusions can be claimed according to DIN 0832.
Bevorzugt ist die erste Gruppe der LEDs genauso groß wie die zweite Gruppe der LEDs. Das bedeutet, daß jeweils die halbe Anzahl der in der Schaltungsanordnung verwendeten LEDs anti- parallel zu den restlichen LEDs der Schaltungsanordnung be- trieben wird, so daß in beiden Halbperioden der Wechsel— Spannung die gleiche Anzahl von LEDs leuchtet . Die WechselSpannung wird bevorzugt von einem Transformator erzeugt, der eine Netzspannung von 220 V auf eine Versorgungsspannung zwischen 10 und 40 V herunter transformiert. Auch für den Transformator kann ein Fehlerausschluß nach der DIN 0832 geltend gemacht werden. Die Wechselspannung ist auch insofern günstig, als auch die Vorteile eines Impulsbetriebes in Anspruch genommen werden können, da die Halbwelle einer sinusförmigen WechselSpannung zu ähnlichen Effekten führen kann, wie ein rechteckförmiger Impuls. Dies ist günstig, da bei Impulsbetrieb der LEDs eine höhere Lichtausbeute erzielt werden kann als bei Gleichstrombetrieb.The first group of LEDs is preferably the same size as the second group of LEDs. This means that half the number of LEDs used in the circuit arrangement is operated antiparallel to the remaining LEDs of the circuit arrangement, so that the same number of LEDs lights up in both half-periods of the AC voltage. The AC voltage is preferably generated by a transformer that transforms a mains voltage of 220 V down to a supply voltage between 10 and 40 V. An error exclusion according to DIN 0832 can also be claimed for the transformer. The AC voltage is also favorable insofar as the advantages of pulse operation can also be claimed, since the half-wave of a sinusoidal AC voltage can lead to effects similar to those of a rectangular pulse. This is advantageous because a higher luminous efficacy can be achieved when the LEDs are operated in pulses than when operating in direct current.
Durch die Maßnahme, daß jeweils zwei antiparallel betriebene LEDs in einem Gehäuse zusammengefaßt sind, wird vorteilhafterweise erreicht, daß die Anzahl der Bauelemente verringert ist. Ein Springen von Lichtpunkten ist dadurch vorteilhafterweise ebenfalls vermindert, da die gleichfarbig emittierenden LEDs so eng beieinander liegen, daß sie nach außen hin wie jeweils ein Leuchtpunkt erscheinen. Das dann verbleibendeThe measure that two antiparallel operated LEDs are combined in one housing advantageously means that the number of components is reduced. A jumping of light points is also advantageously reduced, since the LEDs of the same color emit are so close together that they appear to the outside like a luminous point. The remaining one
Flackern zwischen verschiedenen Leuchtpunkten hätte dann eine Frequenz von 100 Hz, die für einen menschlichen Betrachter nicht mehr wahrnehmbar ist. Hierfür können beispielsweise sogenannte MULTILEDS eingesetzt werden (MULTILED ist eine ein- getragene Marke der Siemens AG) .Flickering between different luminous points would then have a frequency of 100 Hz, which is no longer perceptible to a human viewer. So-called MULTILEDS can be used for this purpose (MULTILED is a registered trademark of Siemens AG).
Weiterhin ist es günstig, wenn jede der beiden Gruppen von LEDs aus mehreren parallel geschalteten elektrischen Strängen besteht, die jeweils mehrere in Reihe geschaltete LEDs auf- weisen. Diese elektrischen Stränge sind weiterhin untereinander an allen Verbindungspunkten der einzelnen LEDs verbunden. Insgesamt ergibt sich so ein Gitter oder Array und ist dadurch und auch aufgrund der Parallelschaltung verschiedener elektrischer LED-Stränge als mehrfach redundant einzustufen.Furthermore, it is advantageous if each of the two groups of LEDs consists of a plurality of electrical strings connected in parallel, each of which has a plurality of LEDs connected in series. These electrical strands are still connected to each other at all connection points of the individual LEDs. Overall, this results in a grid or array and, as a result of this and also because of the parallel connection of different electrical LED strings, can be classified as multiple redundant.
In einer bevorzugten Ausführungsform der Erfindung ist eine Streuscheibe vor den LEDs angebracht, durch die ein möglicherweise für den Betrachter erkennbares Flackern durch hin und herspringende Leuchtpunkte vermieden wird, da durch die Streuscheibe die örtliche Zuordnung des sichtbaren Lichts für den Betrachter unmöglich wird.In a preferred embodiment of the invention, a diffusing screen is attached in front of the LEDs, by means of which a flickering that may be recognizable to the viewer due to light points that jump back and forth is avoided, since the diffusing screen makes it impossible for the viewer to locate the visible light.
Weiterhin ist es günstig, in die einzelnen Stränge eine Halbleiterdiode zu schalten oder in jeden einzelnen Strang einen Brückengleichrichter einzusetzen. Ein solcher Brückengleich- richter kann auch vor das gesamte LED-Array geschaltet sein. Diese Maßnahmen sind insbesondere dann vorteilhaft, wenn die LEDs nur eine geringe Sperrspannung zulassen.Furthermore, it is favorable to switch a semiconductor diode into the individual strings or to use a bridge rectifier in each individual strand. Such a bridge rectifier can also be connected in front of the entire LED array. These measures are particularly advantageous if the LEDs only allow a low reverse voltage.
Im Primär-Stromkreis ist auf einfache Weise eine Stromüberwa- chung möglich, so daß ein komplexes Vorschaltgerät nicht benötigt wird.Current monitoring is easily possible in the primary circuit, so that a complex ballast is not required.
Insgesamt gesehen können für den Transformator und den Vorwiderstand Fehlerausschlüsse entsprechend der DIN 0832 geltend gemacht werden. Die Halbleiterdioden und gegebenenfalls die Brückengleichrichter sind genau wie die LED-Stränge mehrfach vorhanden und damit auch mehrfach redundant .Overall, fault exclusions according to DIN 0832 can be claimed for the transformer and the series resistor. Just like the LED strings, the semiconductor diodes and, if applicable, the bridge rectifiers are multiple and therefore redundant.
Nachfolgend wird die Erfindung anhand eines Ausführungsbei- spiels in Verbindung mit den Figuren 1 und 2 näher erläutert. Es zeigen Figur 1 eine schematische Darstellung des AuführungsbeiSpieles und Figur 2 eine schematische Darstellung eines LED-Gehäuses.The invention is explained in more detail below on the basis of an exemplary embodiment in conjunction with FIGS. 1 and 2. Show it Figure 1 is a schematic representation of the performance example and Figure 2 is a schematic representation of an LED housing.
In der Zeichnung sind ein sekundärseitiger Stromkreis 1, ein Transformator 2, ein Vorwiderstand 3, zwölf LEDs 4 bis 15 und Querverbindungen 16 und 17 dargestellt. Insgesamt bilden sechs LEDs 4 bis 9 und sechs LEDs 10 bis 15 eine erste bzw. eine zweite Gruppe von LEDs, die antiparallel zueinander ge- schaltet sind, d. h., die LEDs 4 bis 9 der ersten Gruppe liegen hinsichtlich ihrer Durchlaßrichtung entgegengesetzt gerichtet im Stromkreis, wie die LEDs 10 bis 15 der zweiten Gruppe. Jede Gruppe besteht aus mehreren parallel geschalteten Strängen 18, 19, 20, 21 hintereinander und in gleicher Durchgangsrichtung geschalteter LEDs. Beispielsweise bilden die LEDs 4, 5 und 6 einen Strang 18 der ersten Gruppe und sind antiparallel zu dem Strang 19 mit den LEDs 10, 11 und 12 der zweiten Gruppe geschaltet. Durch elektrische Querverbindungen 16 und 17 zwischen Verbindungspunkten der einzelnen LEDs eines Stranges 18, 19, 20, 21 untereinander sind die einzelnen Stränge 18, 19, 20, 21 auch untereinander verbunden und bilden somit ein Array oder eine Matrix. Hierbei ist bevorzugt jeder Verbindungspunkt zwischen zwei LEDs eines Stranges 18, 19, 20, 21 jeweils mit genau einem Verbindungs- punkt zwischen jeweils zwei LEDs eines jeden anderen Stranges durch solche Querverbindungen verbunden. Selbstverständlich ist aber auch denkbar, daß jeweils zwei antiparallel zueinander geschaltete Stränge nur untereinander Querverbindungen aufweisen und die dadurch gebildeten Strangpaare untereinan- der nur parallel geschaltet sind und keine Querverbindungen aufweisen. Die eine Gruppe der LEDs wird durch die eine Halbwelle des Wechselstroms und die andere Gruppe durch die andere Halbwelle angesteuert.In the drawing, a secondary-side circuit 1, a transformer 2, a series resistor 3, twelve LEDs 4 to 15 and cross connections 16 and 17 are shown. A total of six LEDs 4 to 9 and six LEDs 10 to 15 form a first and a second group of LEDs which are connected antiparallel to one another, that is to say the LEDs 4 to 9 of the first group lie opposite to one another in the circuit with regard to their forward direction, like LEDs 10 to 15 of the second group. Each group consists of several strings 18, 19, 20, 21 connected in parallel and LEDs connected in the same direction of passage. For example, the LEDs 4, 5 and 6 form a strand 18 of the first group and are connected antiparallel to the strand 19 with the LEDs 10, 11 and 12 of the second group. The individual strands 18, 19, 20, 21 are also connected to one another by electrical cross connections 16 and 17 between connection points of the individual LEDs of a strand 18, 19, 20, 21 and thus form an array or a matrix. Each connection point between two LEDs of a strand 18, 19, 20, 21 is preferably connected to exactly one connection point between two LEDs of each other strand by such cross connections. Of course, it is also conceivable that two strands connected antiparallel to each other only have cross connections with one another and the strand pairs formed in this way are only connected in parallel with one another and have no cross connections. One group of LEDs is driven by one half-wave of the alternating current and the other group by the other half-wave.
Bei Verwendung von Bauteilen, die jeweils zwei LEDs in einem LED-Gehäuse zusammenfassen, wie beispielsweise in einem MUL- TILED-SMD-Gehäuse 22 (Figur 2) (eingetragene Marke der Siemens AG) , werden beispielsweise die LEDs 4 und 12, 5 und 11 und 9 und 13 zu einem Bauteil mit zwei gleichfarbigen Chips zusammengefaßt .When using components that each combine two LEDs in an LED housing, such as in a MULTILED SMD housing 22 (FIG. 2) (registered trademark of Siemens AG), LEDs 4 and 12, 5 and 11 and 9 and 13 combined to form a component with two chips of the same color.
Der Stromkreis 1 wird von dem Transformator 2 mit einer Wechselspannung von 10 bis 40 V zum Betrieb der LEDs 4 bis 15 versorgt. Der primarseitige 220 V Wechselstrom der Spannungε- versorgung liegt dadurch außerhalb der LED- Schaltungsanordnung . The circuit 1 is supplied by the transformer 2 with an alternating voltage of 10 to 40 V for the operation of the LEDs 4 to 15. The primary-side 220 V alternating current of the voltage supply is therefore outside the LED circuit arrangement.
BezugszeichenliΞteReference numerals
1 Stromkreis1 circuit
2 Transformator2 transformer
3 Vorwiderstand3 series resistor
4 - 15 LEDs4 - 15 LEDs
16, 17 Querverbindungen16, 17 cross connections
18 - 21 Stränge18 - 21 strands
22 LED-Gehäuse 22 LED housing

Claims

Patentansprüche claims
1. Schaltungsanordnung für Signalgeber mit LEDs, in der die LEDs (4 bis 15) in einem Stromkreis (1) angeordnet sind, der im Betrieb der Schaltungsanordnung mit einer Wechselspannung versorgt ist, mindestens eine erste Gruppe der LEDs (4 bis 9) antiparallel zu einer zweiten Gruppe der LEDs (10 bis 15) geschaltet ist und in Betrieb der Schaltungsanordnung die beiden Gruppen von LEDs (4 bis 9, 10 bis 15) durch die beiden Wechselstrom- Phasen der Wechselspannung angesteuert sind, d a d u r c h g e k e n n z e i c h n e t , daß jeweils eine LED der ersten Gruppe (4 bis 9) mit einer zu dieser antiparallel geschalteten LED der zweiten Gruppe (10 bis 15) in einem einzigen LED-Gehäuse (22) zusammengefaßt sind und mindestens ein Verbindungspunkt zwischen zwei LEDs der ersten Gruppe (4 bis 9) mit mindestens einem Verbindungspunkt zwischen zwei LEDs der zweiten Gruppe (10 bis 15) durch eine Querverbindungsleitung (16, 17) verbunden ist.1. Circuit arrangement for signal transmitters with LEDs, in which the LEDs (4 to 15) are arranged in a circuit (1) that is supplied with an alternating voltage during operation of the circuit arrangement, at least a first group of LEDs (4 to 9) antiparallel to a second group of LEDs (10 to 15) is switched and in operation of the circuit arrangement the two groups of LEDs (4 to 9, 10 to 15) are controlled by the two alternating current phases of the alternating voltage, characterized in that in each case one LED of the first Group (4 to 9) with an LED of the second group (10 to 15) connected in antiparallel to this are combined in a single LED housing (22) and at least one connection point between two LEDs of the first group (4 to 9) with at least one Connection point between two LEDs of the second group (10 to 15) is connected by a cross connection line (16, 17).
2. Schaltungsanordnung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die erste Gruppe der LEDs (4 bis 9) genauso groß wie die zweite Gruppe der LEDs (10 bis 15) ist.2. Circuit arrangement according to claim 1, so that the first group of LEDs (4 to 9) is the same size as the second group of LEDs (10 to 15).
3. Schaltungsanordnung nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß ein Trans ormator (2) vorgesehen ist, über den der Stromkreis (1) im Betrieb der Schaltungsanordnung mit einer WechselSpannung zwischen 10 und 40 V versorgt wird. 3. Circuit arrangement according to claim 1 or 2, characterized in that a trans ormator (2) is provided, via which the circuit (1) is supplied with an AC voltage between 10 and 40 V during operation of the circuit arrangement.
4. Schaltungsanordnung nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß in die einzelnen Stränge Halbleiterdioden zum Schutz der LEDs (4 - 15) geschaltet sind.4. Circuit arrangement according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that semiconductor diodes for protecting the LEDs (4 - 15) are connected in the individual strands.
5. Schaltungsanordnung nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß ein Vorwiderstand (3) in dem Stromkreis (l) angeordnet ist.5. Circuit arrangement according to one of the preceding claims, that a series resistor (3) is arranged in the circuit (l).
6. Schaltungsanordnung nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß jeder Verbindungspunkt zwischen zwei LEDs (4 bis 15) eines Stranges (18 bis 21) jeweils mit genau einem Verbindungspunkt zwischen jeweils zwei LEDs eines jeden anderen Stranges durch jeweils eine Querverbindung verbunden ist. 6. Circuit arrangement according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that each connection point between two LEDs (4 to 15) of a strand (18 to 21) each with exactly one connection point between two LEDs of each other strand is connected by a cross connection.
PCT/DE1997/001434 1996-07-08 1997-07-08 Circuit for signal transmitters with leds WO1998002020A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BR9710151A BR9710151A (en) 1996-07-08 1997-07-08 Circuit layout for signal emitters in street traffic installations
EP97931711A EP0910934B1 (en) 1996-07-08 1997-07-08 Circuit for signal transmitters with leds
JP50465598A JP2001524249A (en) 1996-07-08 1997-07-08 Circuit arrangement for a signal generator having a light emitting diode
DE59706017T DE59706017D1 (en) 1996-07-08 1997-07-08 CIRCUIT ARRANGEMENT FOR SIGNALERS WITH LIGHTING DIODES
US09/227,672 US6069452A (en) 1996-07-08 1999-01-08 Circuit configuration for signal transmitters with light-emitting diodes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19627475.3 1996-07-08
DE19627475A DE19627475C2 (en) 1996-07-08 1996-07-08 Circuit arrangement for signaling devices in road traffic systems

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/227,672 Continuation US6069452A (en) 1996-07-08 1999-01-08 Circuit configuration for signal transmitters with light-emitting diodes

Publications (1)

Publication Number Publication Date
WO1998002020A1 true WO1998002020A1 (en) 1998-01-15

Family

ID=7799245

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/001434 WO1998002020A1 (en) 1996-07-08 1997-07-08 Circuit for signal transmitters with leds

Country Status (7)

Country Link
EP (1) EP0910934B1 (en)
JP (1) JP2001524249A (en)
KR (1) KR20000023652A (en)
BR (1) BR9710151A (en)
CA (1) CA2260210A1 (en)
DE (2) DE19627475C2 (en)
WO (1) WO1998002020A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999020085A1 (en) * 1997-10-10 1999-04-22 Se Kang Electric Co., Ltd. Electric lamp circuit and structure using light emitting diodes
US6853150B2 (en) 2001-12-28 2005-02-08 Koninklijke Philips Electronics N.V. Light emitting diode driver

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19802895A1 (en) * 1998-01-21 1999-07-22 Siemens Ag Circuit for operating LED light display e.g. for traffic control lighting
JP2003521054A (en) * 2000-01-20 2003-07-08 ミゲル・エス・ジャカマン Intrinsically safe traffic control system, method and apparatus optimized for inherently polar traffic signals
DE20024002U1 (en) * 2000-03-17 2009-03-26 Tridonicatco Gmbh & Co. Kg Power supply of light emitting diodes (LEDs)
EP1871146B1 (en) 2005-02-25 2010-03-17 Murata Manufacturing Co., Ltd. Led lighting apparatus
KR100843402B1 (en) 2007-06-22 2008-07-03 삼성전기주식회사 Led driving circuit and light emtting diode array device
DE102008004507A1 (en) * 2008-01-16 2009-07-23 Ralf Hitzing illuminant
JP5484144B2 (en) * 2010-03-23 2014-05-07 大同信号株式会社 G-shaped LED signal bulb
WO2012016033A1 (en) 2010-07-28 2012-02-02 Momentive Performance Materials Inc. Apparatus for processing materials at high temperatures and pressures
KR101286268B1 (en) 2012-08-30 2013-07-15 이은주 Led signal lamp having led drive box

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2350034A1 (en) * 1976-04-26 1977-11-25 Gaillard Jean Electroluminescent diode arrangement for traffic light signals - is connected in parallel to form groups connected in series and number of groups depends upon supply voltage
US4298869A (en) * 1978-06-29 1981-11-03 Zaidan Hojin Handotai Kenkyu Shinkokai Light-emitting diode display
DE3230975A1 (en) * 1982-08-20 1984-02-23 Robert Bosch Gmbh, 7000 Stuttgart MOTOR VEHICLE LAMP MADE OF LIGHT-EMITTING DIODES OR LIGHT-EMITTING DIODE CHIPS
DE3642251A1 (en) * 1986-01-17 1987-07-23 Siemens Ag Additional circuit for infrared diodes
US4939426A (en) * 1987-03-19 1990-07-03 United States Of America Light emitting diode array

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4271408A (en) * 1978-10-17 1981-06-02 Stanley Electric Co., Ltd. Colored-light emitting display

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2350034A1 (en) * 1976-04-26 1977-11-25 Gaillard Jean Electroluminescent diode arrangement for traffic light signals - is connected in parallel to form groups connected in series and number of groups depends upon supply voltage
US4298869A (en) * 1978-06-29 1981-11-03 Zaidan Hojin Handotai Kenkyu Shinkokai Light-emitting diode display
DE3230975A1 (en) * 1982-08-20 1984-02-23 Robert Bosch Gmbh, 7000 Stuttgart MOTOR VEHICLE LAMP MADE OF LIGHT-EMITTING DIODES OR LIGHT-EMITTING DIODE CHIPS
DE3642251A1 (en) * 1986-01-17 1987-07-23 Siemens Ag Additional circuit for infrared diodes
US4939426A (en) * 1987-03-19 1990-07-03 United States Of America Light emitting diode array

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999020085A1 (en) * 1997-10-10 1999-04-22 Se Kang Electric Co., Ltd. Electric lamp circuit and structure using light emitting diodes
US6853150B2 (en) 2001-12-28 2005-02-08 Koninklijke Philips Electronics N.V. Light emitting diode driver

Also Published As

Publication number Publication date
DE59706017D1 (en) 2002-02-21
JP2001524249A (en) 2001-11-27
EP0910934A1 (en) 1999-04-28
DE19627475C2 (en) 2000-12-07
DE19627475A1 (en) 1998-01-15
KR20000023652A (en) 2000-04-25
BR9710151A (en) 1999-08-10
EP0910934B1 (en) 2002-01-16
CA2260210A1 (en) 1998-01-15

Similar Documents

Publication Publication Date Title
EP1300053B1 (en) Led light source
DE60008855T2 (en) THREE-DIMENSIONAL LED MATRIX FOR LIGHTING
DE60008854T2 (en) LED-MATRIX IN GRID STRUCTURE FOR LIGHTING
DE19807844C5 (en) Device for central emergency lighting
DE102007040555B4 (en) Method and circuit for identifying the type of voltage, in particular the operating voltage supplied to an operating device for emergency lighting
DE10103611B4 (en) Circuit arrangement for operating a plurality of bulbs
EP0910934B1 (en) Circuit for signal transmitters with leds
DE10341022A1 (en) Circuit for a lighting device
EP1740020A2 (en) Circuit and method for operating at least one Led and at least one discharge lamp
EP1755363A1 (en) Circuit and method for operating at least one electric discharge lamp and at least one Led
DE10102352C2 (en) Circuit arrangement for adapting the characteristics of a light-emitting diode arrangement, light-emitting diode signal lamp and light signal arrangement and their use
DE3428444C2 (en)
DE102010015613A1 (en) LED lamp and light
EP1583402A1 (en) Control of lighting devices with a central AC/DC cascaded converter
DE102005032719A1 (en) Traffic signal system, in particular for road traffic
DE10214195A1 (en) Lighting system for triggering lighting devices operates two or more lighting devices and a control unit for triggering the lighting devices.
EP3883836B9 (en) Method and device for controlling and monitoring a functional unit
EP3764746A1 (en) Operating device
DE2137129C3 (en) Arrangement for monitoring thyristors used in downstream systems and their upstream fuses
DE102014104365B4 (en) lighting device
DE102013208392A1 (en) LED module and luminaire with one LED module
EP1341402A2 (en) Lighting device with a LED-module
WO2002096161A1 (en) Circuit configuration for operating light-emitting diodes
EP2927564B1 (en) Lighting device for lighting
DE102019125445A1 (en) Control gear

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 97196231.6

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): BR CA CN JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1997931711

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2260210

Country of ref document: CA

Ref document number: 2260210

Country of ref document: CA

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 09227672

Country of ref document: US

Ref document number: 1019997000105

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 1997931711

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1019997000105

Country of ref document: KR

WWG Wipo information: grant in national office

Ref document number: 1997931711

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1019997000105

Country of ref document: KR