EP2445318B1 - LED-Signallampe mit Konstantstrombetrieb - Google Patents

LED-Signallampe mit Konstantstrombetrieb Download PDF

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Publication number
EP2445318B1
EP2445318B1 EP10187788.4A EP10187788A EP2445318B1 EP 2445318 B1 EP2445318 B1 EP 2445318B1 EP 10187788 A EP10187788 A EP 10187788A EP 2445318 B1 EP2445318 B1 EP 2445318B1
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EP
European Patent Office
Prior art keywords
electrical circuit
voltage
resistance
led
circuit
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Not-in-force
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EP10187788.4A
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English (en)
French (fr)
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EP2445318A1 (de
Inventor
Kassen Oldewurtel
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GTS Deutschland GmbH
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Thales Deutschland GmbH
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Priority to EP10187788.4A priority Critical patent/EP2445318B1/de
Priority to RS20130330A priority patent/RS52884B/en
Priority to ES10187788T priority patent/ES2426033T3/es
Priority to SI201030308T priority patent/SI2445318T1/sl
Priority to DK10187788.4T priority patent/DK2445318T3/da
Publication of EP2445318A1 publication Critical patent/EP2445318A1/de
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Publication of EP2445318B1 publication Critical patent/EP2445318B1/de
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    • 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
    • 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
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/357—Driver circuits specially adapted for retrofit LED light sources
    • H05B45/3574—Emulating the electrical or functional characteristics of incandescent lamps
    • H05B45/3577—Emulating the dimming characteristics, brightness or colour temperature of incandescent lamps
    • 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
    • H05B47/10—Controlling the light source
    • H05B47/17—Operational modes, e.g. switching from manual to automatic mode or prohibiting specific operations

Definitions

  • the invention relates to an electrical circuit for an LED signal lamp, comprising means for switching between a low level brightness, in particular a night time operation level brightness, and a high level brightness, in particular a daylight operation level brightness, of the LED signal lamp in dependence of an AC voltage at a voltage input of the electrical circuit.
  • Signal lamps are used in a variety of fields, in particular in traffic control applications. Of particular importance are railway signal lamps.
  • the signal lamps are used to indicate a train operator whether an upcoming part of a railway track (such as a track switch) can be entered safely.
  • the light of a railway signal lamp must be bright enough for the train operator to recognize the status of the signal lamp well before arriving at the signal lamp.
  • the luminous intensity of the signal lamp must be low enough so the train operator is not dazzled. This means that the luminous intensity of a railway signal lamp should be adapted in the course of a day.
  • railway signal lamps of the state of the art typically use conventional light bulbs as their illuminant.
  • the railway control center modifies the AC input voltage of the railway signal lamps.
  • the light bulbs are operated at a reduced voltage of about 66%, as compared to the voltage used during daytime.
  • the input voltage is switched accordingly in order to have this day/night adaptation.
  • the characteristic of an LED is very different from the characteristic of a light bulb, in particular as far as the correlation between input voltage and luminous intensity is concerned.
  • the existing equipment at railway control centers for adapting the luminous intensity by changing the input voltage is no more suitable.
  • EP 1 787 886 B1 discloses an electrical circuit for an LED signal lamp by means of which the luminous intensity of the LED signal lamp is switched between a daylight level and a night time level in dependence of the operating voltage.
  • LEDs are supplied with power via a high resistance path for night time operation, and via a low resistance path for daylight operation.
  • the electrical circuit behaves similar to a light bulb, and the existing equipment at a railway control center can be used for switching between daylight and night time operation mode just by altering the AC input voltage.
  • the known electrical circuit is significantly susceptible to tolerances of included components, in particular LEDS, such as tolerances regarding different lots and different manufactures. Therefore, mass production is difficult. Further, the electrical circuit is similarly susceptible to fluctuations of the ambient temperature, which may alter main LED parameters. Such temperature fluctuations might be caused by weather changes in many geographical regions. The brightness of the LED signal lamp is difficult to control, in particular when the input voltage varies, and the peak forward voltage at the LEDs limits the LED brightness.
  • the LED arrangement of the at least one LED block is operated via its switchable constant current source.
  • the forward current at the LED arrangement is fixed and does no more depend on the forward voltage of the LED arrangement, which varies with the ambient temperature and/or the manufacturer and/or the lot and/or the colour of the LED(s).
  • the brightness is proportional to the forward current of the switchable constant current source and thus mostly constant, even at varying temperature, manufacturer or lot.
  • the change between daylight operation mode and night time operation mode is done by setting the switchable constant current source to appropriate current values, respectively. So within each mode, a respective mostly constant brightness level may be maintained.
  • the "on time” of the LED arrangement within one mains cycle (which is about 20 ms assuming a 50 Hz AC voltage) is about 20% longer. Hence the brightness is increased about 20%. Further, the full wave rectification increases the "on time” of the LED arrangement by another 100% as compared to the state of the art using a single wave rectifier. So the invention also allows for an increase of the brightness of the LED arrangement and improved efficiency.
  • a railway control center typically checks whether a connected signal behaves adequately when supplying it with a particular voltage. This check typically includes measuring the current consumption. A too low current consumption indicates a torn glow filament of a light bulb, and a too high current indicates a short circuit; in both cases the signal probably does not shine as desired, and the railway control center generates an alarm message.
  • the current consumption of the constant current source and the LED arrangement is, taking into account both operation modes, different from what is expected from a light bulb.
  • the AC voltage at the voltage input results in the expected current consumption behaviour corresponding to the simulated light bulb; thus no unnecessary alarm messages are generated just because an LED signal lamp is used instead of a light bulb.
  • the switchable resistance wastes some energy, but this is by far outweighed by the reduced equipment expenditures at the railway control center. The increased reliability and lifetime of LEDs as compared to light bulbs is still fully used with the invention.
  • a preferred embodiment of the electrical circuit provides that the electrical circuit comprises several LED block circuits connected in parallel at the two poles. By this means, the overall brightness may be increased in a simple way. The LED blocks may be exchanged as a whole in case a defect is found.
  • only part of the LED block circuits in particular only one of the LED block circuits, comprises a switchable resistance.
  • some of the LED blocks preferably all but one
  • only one switchable resistance is necessary to simulate the behaviour of a light bulb.
  • the resistance values of the switchable resistance in the two operation modes should be adapted to the current consumption of the LEDs simulating the light bulb (in particular to the number of LEDs or LED blocks).
  • the comparator circuit comprises a reference element, with its reference input connected to the poles via a potential divider, with one of its control contacts connected to the signal output of the comparator circuit, and with one of its control contacts connected to one of the poles.
  • the potential divider By means of the potential divider, the switching threshold at the reference element (and thus the critical level of the rectified AC voltage) can be adapted.
  • the control contacts are short-circuited or not, thus setting the signal output of the comparator circuit to the potential of the connected pole or not.
  • the reference element may be of type LM431, for example.
  • a reference element suitable for the invention is also known form EP 1 787 886 B1 , in particular Fig. 2 therein.
  • the signal output of the comparator circuit is connected to one of the poles via a capacity and a resistance, with said capacity and said resistance connected in parallel.
  • the capacity variations over a cycle of the rectified AC voltage are evened out, such that unnecessary switching is avoided.
  • the signal output of the comparator circuit is discharged such that long term changes of the rectified AC voltage have an impact on the signal at the signal output of the comparator circuit.
  • the switchable constant current source comprises a constant current source connected to one of the poles via a resistance and a switch, with said resistance and switch connected in parallel.
  • the constant current source is supplied with power of the poles via the resistance or directly through the switch.
  • the forward current of the constant current source can be switched easily.
  • the switch comprises a transistor, with its base or gate acting as the switching input of the switchable constant current source.
  • the constant current source comprises a transistor, with its base or gate connected to one of the poles via a voltage limiting component, in particular a diode such as a Zener diode.
  • a voltage limiting component in particular a diode such as a Zener diode.
  • the preload switch comprises a transistor, in particular with its base or gate acting as the switching input of the switching resistance.
  • the switching function may be realized electronically by simple means.
  • the electronic circuit comprises a diode connected in series with a pole.
  • the diode ensures the voltage polarity beyond the full wave rectifier, in particular blocking unintended voltage fluctuations/interferences.
  • the AC voltage has a peak voltage of about 12 V, and the critical level is between 9.5 V and 11.5 V, in particular about 11 V. Said AC voltage level of 12 V is valid for the daylight operation mode; during night time operation mode, the AC voltage has a peak voltage of about 8 V. These values are suitable for most railway signals and traffic lights.
  • the LED arrangement comprises several light emitting diodes, in particular two light emitting diodes connected in series.
  • a plurality of light emitting diodes of an LED arrangement, typically connected in series, may generate a higher brightness, as compared to a single LED, and beneficially all LEDs of the LED arrangement may be controlled in common.
  • the electrical circuit is designed such that the current through the LED arrangement changes by a factor of between 10 and 100, preferably between 20 and 60, most preferably about 50, when switching between low level brightness and high level brightness.
  • These current changes lead to brightness adaptations found useful in practice.
  • the switchable resistance typically in night time mode, due to low current required by the LED arrangement, considerable current is directed through the switchable resistance to simulate the behaviour of a filament light bulb.
  • daylight mode typically basically all current is consumed by the LED arrangement, and none or only few current flows through the switchable resistance.
  • inventive electrical circuit in a railway signal or in a traffic light signal.
  • inventive electrical circuit may act as an LED signal lamp, replacing a conventional light bulb for generating light signals in a daylight and a night time operation mode, wherein the operation mode is determined by the AC voltage level fed into the signal, such as a 66% voltage level at night time operation mode as compared to daylight operation mode.
  • Fig. 1 shows in a schematic block diagram an inventive electrical circuit 1 for an LED signal lamp.
  • the electrical circuit 1 comprises a voltage input 2, with two input contacts, for inputting an AC voltage.
  • This AC voltage is provided by a railway control center (or other signal control center) which typically switches the AC voltage between:
  • the AC voltage has a frequency of 50-60 Hz and originates from transforming down a 230-240 V mains voltage.
  • the AC voltage provided at the voltage input 2 is fed into a full wave rectifier 3, which rectifies the AC voltage into immediately subsequent sine-shaped voltage half-waves of identical (positive) polarity.
  • the rectified voltage is supplied to two poles 4a, 4b. Note that the lower pole 4b is typically at mass potential.
  • one LED block circuit 5 is connected. Note that alternatively, a plurality of LED block circuits 5 may be connected in parallel at the poles 4a, 4b.
  • the LED block circuit 5 comprises an LED arrangement 6 powered by a switchable constant current source 7; for the details of the LED block circuit 5 compare Figs. 2 and 3 .
  • Fig. 2 the basic principle of an LED block circuit 5 is illustrated.
  • the rectified AC voltage provided at pole 4a (with pole 4b at mass potential), after having passed diode 8, is fed into a comparator circuit (or voltage comparator) 9.
  • the switchable constant current source 7, powered via the poles 4a, 4b, is connected in series with an LED arrangement 6, which comprises two LEDs connected in series here.
  • the LED arrangement 6 receives a high constant current (in daylight operation mode, when the rectified AC voltage is above Vcrit) or a low constant current (in night time operation mode, when the rectified AC voltage is below Vcrit).
  • the comparator circuit 9 also switches the preload switch S2.
  • the preload switch 10 In night time operation mode, the preload switch 10 is closed, such that preload resistors 11, 12 are both effective, and a relatively high current passes through the two preload resistors 11, 12 in summary. Note that in night time operation mode, the current consumption of the LED arrangement 6 is relatively low.
  • the preload switch S2 In daylight operation mode, the preload switch S2 is open, such that the first preload resistor 11 is disconnected and only the second preload resistor 12 is effective; then only a relatively low current passes through the preload resistor 12. Note that in daylight operation mode, the current consumption of the LED arrangement 6 (together with the constant current source 7) is relatively high. By means of the current through the preload resistors 11, 12, the current consumption of a conventional light bulb is simulated.
  • the entirety of preload switch S2 and the preload resistors 11, 12 is also called a switchable resistance.
  • the switchable constant current source 7 provides precise current conditions over a wide range of temperatures and component tolerances, in particular LED tolerances.
  • the luminous intensity is highly predictable in both operation modes, and mass production of the electrical circuit, and more specifically of an LED block circuit of such an electronic circuit, is feasible.
  • the LED block circuit 5 may comprise further switchable constant current sources and connected LED arrangements, connected in parallel to the switchable constant current source 7 and the LED arrangement 6 shown in Fig. 2 , in order to increase the number of powered LEDs or the brightness of the LED signal lamp as a whole, respectively.
  • Fig. 3 illustrates in more detail an embodiment of an LED block circuit 5 by way of example in a detailed circuit diagram.
  • the LED block circuit 5 is connected between two poles 4a, 4b providing a rectified AC voltage.
  • the LED block circuit 5 comprises basically
  • Pole 4b is at mass potential in the example shown.
  • the comparator circuit 9 comprises a reference element 14 with a reference point of 2.5 V, with its reference input RI connected to the poles 4a, 4b via a voltage divider.
  • Connected in parallel to resistor R2 is a capacitor C1 for filtering out interferences.
  • the reference element 14 comprises two control contacts CC1, CC2.
  • CC1 is connected to the lower pole 4b directly, whereas CC2 is connected to the upper pole 4a via a resistor R3 here. If the voltage at reference input RI is above 2.5 V (i.e. if the rectified voltage is above Vcrit), then CC2 is short-circuited with CC1 (i.e. with mass potential); else CC1 and CC2 are electrically isolated with respect to each other.
  • the signal is "high” as long as the voltage at reference input RI is below 2.5 V (night time operation mode), and the signal is “low” as long as the voltage at RI is above 2.5 V (daylight operation mode).
  • the signal at signal output SO is smoothed over the sine half waves by means of a capacitor C2, with a resistor R5 in parallel for discharging purposes.
  • the signal output SO is read out by a signal input SI1 the switchable constant current source 7.
  • the switchable constant current source 7 comprises a constant current source 7a and a switching subcircuit 7b.
  • the constant current source 7a comprises a transistor T1 (here a bipolar transistor) with its emitter connected to the switching subcircuit 7b via a resistance R6, its collector connected to an LED arrangement 6, and its base connected to the upper pole 4a via a voltage limiting component, here a Zener diode 16, so a fixed maximum voltage (namely the limited voltage of the voltage limiting component) is present at the base (or across resistor R7, respectively).
  • the current through the constant current source 7a ⁇ and thus through the LED arrangement 6 - is determined by said fixed maximum voltage and is thus highly constant, resulting in a high control over the LED brightness in the LED arrangement.
  • the supplied voltage at resistor R6 of the constant current source 7a can be altered, what in turn alters the current through the LED arrangement 6.
  • switch S1 here realized as a field effect transistor T2
  • switch S1 is closed (i.e. the transistor T2 is conductive), such that at R6 there is the potential of pole 4a.
  • switch S1 is open (i.e. the transistor T2 is non-conductive), such that at R6 there is a potential reduced by the effect of resistor R8 as compared to the pole 4a.
  • the signal output SO of the comparator circuit 9 is further read out by the signal input SI2 of the switchable resistance 13.
  • the switchable resistance 13 comprises a preload switch S2 here consisting of two transistors T3 and T4.
  • Transistor T3 here a field effect transistor acts identically to the transistor T2, such that a "low” signal at signal output SO results in the potential of pole 4a (i.e. a positive potential) present at resistor R9, and a "high” signal at signal output SO results in the potential of lower pole 4b (i.e. mass) present at resistor R9.
  • mass potential at the base of transistor T4 (here a bipolar transistor) makes the transistor T4 conductive, and through first preload resistor 11 some current is lead from pole 4a to pole 4b, in addition to some current flowing through second preload resistor 12.
  • Positive potential at the base of transistor T4 in contrast, makes the transistor T4 non-conductive, and no current may flow through the first preload resistor 11. Then only some current may flow through the second preload resistor 12 from pole 4a to pole 4b.

Claims (15)

  1. Elektrische Schaltung (1) für eine LED-Signallampe, umfassend eine Einrichtung zum Schalten zwischen einer geringen Helligkeitsstufe, insbesondere einer Helligkeitsstufe für den Nachtbetrieb, und einer hohen Helligkeitsstufe, insbesondere einer Helligkeitsstufe für den Tagesbetrieb, der LED-Signallampe in Abhängigkeit von einer Wechselspannung an einem Spannungseingang (2) der elektrischen Schaltung (1),
    - einen Vollwellengleichrichter (3) zum Gleichrichten der Wechselspannung, die am Spannungseingang (2) der elektrischen Schaltung (1) zugeführt wird, wodurch an zwei Polen (4a, 4b) eine gleichgerichtete Wechselspannung bereitgestellt wird, und
    - mindestens eine LED-Blockschaltung (5), die mit den Polen (4a, 4b) verbunden ist,
    und dass die LED-Blockschaltung (5) umfasst:
    - eine LED-Anordnung (6) umfassend mindestens eine Leuchtdiode,
    - eine Vergleichsschaltung (9), die eine Signalspannung an einem Signalausgang (SO) der Vergleichsschaltung (9) schaltet, wenn die gleichgerichtete Wechselspannung ein kritisches Niveau (Vcrit) überschreitet,
    dadurch gekennzeichnet, dass die elektrische Schaltung (1) umfasst:
    - eine schaltbare Konstantstromquelle (7), deren Schalteingang (SI1) mit dem Signalausgang (SO) der Vergleichsschaltung (9) verbunden ist, wobei die schaltbare Konstantstromquelle (7) mit der LED-Anordnung (6) in Reihe geschaltet ist,
    - und einen schaltbaren Widerstand (13), dessen Schalteingang (SI2) mit dem Signalausgang (SO) der Vergleichsschaltung (9) verbunden ist, wobei die Vergleichsschaltung (9), der schaltbare Widerstand (13) und die schaltbare Konstantstromquelle (7) zusammen mit der LED-Anordnung (6) an den Polen (4a, 4b) parallel geschaltet sind.
  2. Elektrische Schaltung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die elektrische Schaltung (1) mehrere LED-Blockschaltungen (5) aufweist, die an den zwei Polen (4a, 4b) parallel geschaltet sind.
  3. Elektrische Schaltung (1) nach Anspruch 2, wobei nur ein Teil der LED-Blockschaltungen (5), insbesondere nur eine der LED-Blockschaltungen (5), einen schaltbaren Widerstand (13) aufweist.
  4. Elektrische Schaltung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Vergleichsschaltung (9) ein Referenzelement (14) aufweist, dessen Referenzeingang (RI) mit den Polen (4a, 4b) über einen Spannungsteiler verbunden ist, wobei einer seiner Steuerkontakte (CC2) mit dem Signalausgang (SO) der Vergleichsschaltung (9) verbunden ist und einer seiner Steuerkontakte (CC1) mit einem der Pole (4b) verbunden ist.
  5. Elektrische Schaltung (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Signalausgang (SO) der Vergleichsschaltung (9) mit einem der Pole (4a) über eine Kapazität (C2) und einen Widerstand (R5) verbunden ist, wobei die Kapazität (C2) und der Widerstand (R5) parallel geschaltet sind.
  6. Elektrische Schaltung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die schaltbare Konstantstromquelle (7) eine Konstantstromquelle (7a) aufweist, die über einen Widerstand (R8) und einen Schalter (S1) mit einem der Pole (4a) verbunden ist, wobei der Widerstand (R8) und der Schalter (S1) parallel geschaltet sind.
  7. Elektrische Schaltung (1) nach Anspruch 6, dadurch gekennzeichnet, dass der Schalter (S1) einen Transistor (T2) aufweist, dessen Basis oder Gate als Schalteingang (SI1) der schaltbaren Konstantstromquelle (7) fungiert.
  8. Elektrische Schaltung (1) nach Anspruch 6, dadurch gekennzeichnet, dass die Konstantstromquelle (7a) einen Transistor (T1) aufweist, dessen Basis oder Gate mit einem der Pole (4a) über eine Spannungsbegrenzungskomponente, insbesondere eine Diode, beispielsweise eine Zenerdiode (16), verbunden ist.
  9. Elektrische Schaltung (1) nach Anspruch 1, dadurch gekennzeichnet, dass der schaltbare Widerstand (13) umfasst:
    - eine Reihenschaltung eines ersten Vorlastwiderstands (11) und eines Vorlastschalters (S2)
    - und einen zweiten Vorlastwiderstand (12),
    wobei der zweite Vorlastwiderstand (12) mit der Reihenschaltung des ersten Vorlastwiderstands (11) und des Vorlastschalters (S2) parallel geschaltet ist.
  10. Elektrische Schaltung nach Anspruch 9, dadurch gekennzeichnet, dass der Vorlastschalter (S2) einen Transistor (T3, T4) aufweist, insbesondere wobei dessen Basis oder Gate als Schalteingang (SI2) des Schaltwiderstands (13) fungiert.
  11. Elektrische Schaltung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die elektronische Schaltung (1) eine Diode (8) aufweist, die mit einem Pol (4a) in Reihe geschaltet ist.
  12. Elektrische Schaltung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Wechselspannung eine Spitzenspannung von ca. 12 V hat und das kritische Niveau (Vcrit) zwischen 9,5 V und 11,5 V, insbesondere bei ca. 11 V liegt.
  13. Elektrische Schaltung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die LED-Anordnung mehrere Leuchtdioden aufweist, insbesondere zwei in Reihe geschaltete Leuchtdioden.
  14. Elektrische Schaltung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die elektrische Schaltung (1) so ausgebildet ist, dass der Strom durch die LED-Anordnung (6) sich um einen Faktor von zwischen 10 und 100, vorzugsweise von zwischen 20 und 60, am meisten bevorzugt von ca. 50 beim Schalten zwischen einer geringen Helligkeit und einer hohen Helligkeit ändert.
  15. Verwendung einer elektrischen Schaltung nach Anspruch 1 in einem Eisenbahnsignal oder einem Ampelsignal.
EP10187788.4A 2010-10-15 2010-10-15 LED-Signallampe mit Konstantstrombetrieb Not-in-force EP2445318B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP10187788.4A EP2445318B1 (de) 2010-10-15 2010-10-15 LED-Signallampe mit Konstantstrombetrieb
RS20130330A RS52884B (en) 2010-10-15 2010-10-15 Constant current LED SIGNAL LAMP
ES10187788T ES2426033T3 (es) 2010-10-15 2010-10-15 Lámparas de señalización LED con funcionamiento de corriente constante
SI201030308T SI2445318T1 (sl) 2010-10-15 2010-10-15 Led signalna svetilka z delovanjem na konstantni tok
DK10187788.4T DK2445318T3 (da) 2010-10-15 2010-10-15 LED-signallampe med drift ved konstant strøm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10187788.4A EP2445318B1 (de) 2010-10-15 2010-10-15 LED-Signallampe mit Konstantstrombetrieb

Publications (2)

Publication Number Publication Date
EP2445318A1 EP2445318A1 (de) 2012-04-25
EP2445318B1 true EP2445318B1 (de) 2013-05-29

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EP10187788.4A Not-in-force EP2445318B1 (de) 2010-10-15 2010-10-15 LED-Signallampe mit Konstantstrombetrieb

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EP (1) EP2445318B1 (de)
DK (1) DK2445318T3 (de)
ES (1) ES2426033T3 (de)
RS (1) RS52884B (de)
SI (1) SI2445318T1 (de)

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DE102013108689B3 (de) * 2013-08-11 2014-11-13 Pintsch Bamag Antriebs- Und Verkehrstechnik Gmbh Schaltung zur Regelung der Leistungsaufnahme einer LED-Einheit sowie LED-Leuchte mit einer solchen LED-Einheit

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ES2426033T3 (es) 2013-10-18
SI2445318T1 (sl) 2013-10-30
DK2445318T3 (da) 2013-07-29
ES2426033T8 (es) 2013-11-15
EP2445318A1 (de) 2012-04-25

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