EP2355621B1 - Compensation de température du flux lumineux sur des lampes à DEL - Google Patents

Compensation de température du flux lumineux sur des lampes à DEL Download PDF

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Publication number
EP2355621B1
EP2355621B1 EP11153517.5A EP11153517A EP2355621B1 EP 2355621 B1 EP2355621 B1 EP 2355621B1 EP 11153517 A EP11153517 A EP 11153517A EP 2355621 B1 EP2355621 B1 EP 2355621B1
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Prior art keywords
temperature
circuit
signal
current
led
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EP11153517.5A
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German (de)
English (en)
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EP2355621A2 (fr
EP2355621A3 (fr
Inventor
Stefan Metzenroth
Clemens Meyer
Michael Woski
Michael Härtl
Robert Strübl
Markus Rhein
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Siteco GmbH
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Siteco GmbH
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Priority to PL11153517T priority Critical patent/PL2355621T3/pl
Publication of EP2355621A2 publication Critical patent/EP2355621A2/fr
Publication of EP2355621A3 publication Critical patent/EP2355621A3/fr
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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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/56—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving measures to prevent abnormal temperature of the LEDs
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • 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
    • 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

Definitions

  • the invention relates to a circuit for controlling a lamp, in particular an exterior lamp, a headlamp, a lamp for cold rooms or a vehicle lamp, with at least one LED as the illuminant, and a lighting system which comprises such a circuit.
  • the circuit allows in particular to compensate for a temperature dependence of the luminous flux of the LED.
  • Control circuits for LED lights known from the prior art usually supply the LEDs of the light with a constant electrical current. For example, is beyond DE 198 10 827 A1 a lamp is known which has a temperature sensor which is electrically connected to the control circuit. The temperature sensor is used to detect an LED temperature, which is then compared by the control circuit with a predetermined temperature threshold. If the LED temperature is above the temperature threshold, the control circuit reduces the supply current of the LED in order to prevent the LED from overheating. In this way, premature aging and an increased risk of failure of the LED are to be avoided.
  • WO 01/48495 A1 discloses a sensor circuit for determining a supply current for a non-linear LED depending on the temperature.
  • the circuit comprises a feedback of a part of the supply current through the LED to a temperature-dependent circuit. In this way, the supply current through the LED is kept constant above a threshold temperature.
  • EP 0 492 117 A2 discloses an adjustable temperature compensation power source in which the supply current is adjusted by a load to account for load dependent changes in temperature performance.
  • the object of the present invention is to provide a circuit for the power supply of an LED light which enables an energy-saving power supply of the light.
  • the object is achieved by a circuit according to claim 1 and a lighting system according to claim 7.
  • the circuit serves to supply power to at least one lamp, for example an outdoor lamp, with at least one LED as the illuminant.
  • the circuit has a signal input for receiving a temperature signal and an electrical supply output or an output for a control signal for controlling a supply device with a supply output.
  • the circuit provides an electrical current at the supply output for supplying the LED of the lamp.
  • the circuit uses the received temperature signal, which corresponds to a temperature.
  • the circuit provides the current so that there is a first, lower temperature interval and a second, higher temperature interval, the circuit providing a lower current when the temperature is in the first temperature interval than when it is in the second temperature interval.
  • the received temperature signal can correspond, for example, to a temperature sensed by a temperature sensor, in particular an LED temperature or an ambient temperature of the luminaire.
  • the circuit can further comprise a supply input via which the circuit is supplied with electrical power.
  • the current provided by the circuit at the supply output can be used directly to supply one or more LEDs.
  • the current provided is intended to serve as an input variable for an amplifier arrangement which supplies the LED with electrical power.
  • the invention is based on the observation that the luminous flux of an LED generally decreases at a given current with increasing LED operating temperature.
  • the luminous flux can decrease, in particular linearly or approximately linearly, with increasing temperature over a wide range. Therefore, in the case of control circuits which do not take this effect into account, the luminous flux of an LED outdoor luminaire is increased compared to warmer ambient temperatures in colder ambient temperatures. In this way, a higher luminous flux than necessary can occur, for example, in wintry outside temperatures, which is associated with an unnecessarily high energy consumption or even leads to glare.
  • the supply of the LED with the circuit according to the invention avoids this because the power supply is reduced in the lower temperature interval. Furthermore, the reduction in the current enables a reduction in aging effects of the driven LED, since these are generally temperature and current dependent.
  • the luminous flux of the LED also increases with increasing current.
  • the luminous flux of the LED therefore depends on two sizes: the LED temperature and the current. At the transition from a higher to a lower temperature increases the luminous flux of the LED for a given electrical supply current. To compensate for this increase, the circuit reduces the supply current. On the one hand, this compensates for the temperature dependence of the luminous flux. On the other hand, a current reduction also reduces the electrical power converted in the LED. This results in an energy saving effect.
  • the invention can provide that the electricity provided only partially and / or only compensates for the temperature dependence of the luminous flux in one or a few temperature ranges.
  • the current provided by the circuit is independent of the temperature if this is in the second, higher temperature interval.
  • the current assumes a constant, ie temperature-independent value I K in this temperature interval.
  • I K temperature-independent value
  • the same supply current I K results for all temperatures within the second temperature interval. This prevents the current provided from rising to a certain extent, which could lead to thermal damage to the LED. Since a further temperature rise within the second temperature interval does not cause a further increase in the supply current, a positive feedback loop is avoided, which could cause thermal destruction of the LED or premature aging.
  • the first temperature interval and the second temperature interval adjoin one another at a threshold temperature T S. Since the current provided for temperatures within the first temperature interval is lower than for temperatures within the second temperature interval, this prevents a temperature range between the two temperature intervals in which the current provided takes on unnecessarily high or low values. In particular, if the circuit keeps the current provided for temperatures within the second temperature interval at a constant value I K , this results in the activation behavior leading into a constant current phase. This protects the LED against overcurrent and thus overheating.
  • the circuit provides a current which it carries along a predetermined temperature characteristic curve when the temperature is in the first temperature interval.
  • the temperature characteristic describes the current provided as a function of the temperature.
  • the temperature characteristic curve in the first temperature interval increases monotonically with the temperature. This ensures that an increase in temperature within the first temperature interval does not reduce the Supply current can cause. This avoids that the reduction in the luminous flux due to the temperature increase is additionally increased by a reduction in the supply current.
  • the temperature characteristic curve increases strictly monotonously with the temperature. This prevents the described reduction of the luminous flux from being amplified by the temperature effect through a current effect in the entire first temperature interval.
  • the temperature characteristic can increase linearly, approximately linearly or progressively. In the event that the luminous flux of the LED also decreases linearly with the operating temperature, this temperature dependency can be compensated for in particular by a linear increase in the current.
  • the circuit can have a temperature characteristic curve which has a first temperature interval in which the characteristic curve does not rise linearly, but rather flattens out towards higher temperatures. In this way, there is a smooth transition from the temperature range in which compensation for the temperature dependence is achieved to the range with a constant supply current.
  • the circuit provides a current that is lower than for temperatures in the second temperature interval.
  • the current provided can assume the constant value I R in the third temperature interval.
  • T R can be, in particular if the temperature corresponds to an LED temperature, for example in the interval from 40 ° C. to 170 ° C., in particular between 90 ° C. and 150 ° C.
  • the second and the third temperature interval adjoin one another at the temperature T R.
  • the circuit also has a means for detecting the voltage at the supply output of the circuit. In this way, the voltage applied to the LED can also be determined.
  • the circuit can determine the current provided at the supply output as a function of the determined voltage.
  • the forward voltage of an LED is temperature-dependent. Therefore, in these embodiments there is the advantage that the temperature dependence of the forward voltage can be taken into account in order to conduct the supply current of the LED.
  • the circuit changes the current provided as a function of the voltage detected at the supply output. Since the forward voltage of an LED generally increases with falling temperature, the power converted in the LED also increases with decreasing temperature for a given current. This effect can be taken into account by the circuit modifying the temperature characteristic curve in accordance with the determined voltage.
  • the circuit can vary the temperature characteristic in the lower temperature interval as a function of the determined voltage. Furthermore, the circuit can change the threshold temperature T S as a function of the determined voltage. Furthermore, in some embodiments, the circuit can carry the current, so that the power provided at the supply output is temperature-independent in a temperature interval, for example in the first, lower temperature interval.
  • the circuit may provide the supply current in one embodiment as a direct current.
  • the circuit changes the supply current by changing the current.
  • the circuit can also provide the supply current as a pulsed current by means of pulse width modulation (PWM).
  • PWM pulse width modulation
  • the current provided periodically changes between a minimum value and a maximum value, the effective value of the current being determined by the pulse duty factor.
  • the circuit according to one embodiment effects a change in the current via a change in the duty cycle.
  • the duty cycle is smaller for temperatures in the first temperature interval than for temperatures in the second temperature interval.
  • the circuit provides a modulated current and changes its effective value by changing the minimum and / or maximum value of the current, keeping the pulse duty factor constant, for example.
  • Other current cycles that are periodic in time are also possible.
  • the following and in the claims in the case of a pulsed or a generally periodic current is understood by the term current whose rms value averaged over a period.
  • the circuit can provide various means for carrying the current in dependence on the received temperature signal.
  • the means can be selected so that the circuit can be used together with an intended temperature sensor.
  • the circuit in which the circuit is intended to be used with a temperature sensor that provides a temperature-dependent current or voltage signal, the circuit may use the received signal to provide the current.
  • the circuitry may further include means for amplifying the received signal.
  • the circuit in further embodiments of the circuit which are provided for use with a temperature sensor which has a temperature-dependent resistance, the circuit can have means for determining the resistance.
  • the circuit can provide a current or a voltage at the signal input and can detect the applied voltage or current.
  • the circuit can additionally comprise a subcircuit which has a plurality of sub-signal inputs for receiving a plurality of temperature sub-signals and a signal output for a temperature signal.
  • the signal output of the subcircuit is connected to the signal input of the circuit.
  • the subcircuit is used to determine a temperature signal from the plurality of temperature sub-signals, which uses the circuit to determine the supply current.
  • one temperature sensor can be connected to each of the sub-signal inputs.
  • the subcircuit can determine the temperature signal, for example, by arithmetically averaging the temperatures to which the received temperature sub-signals correspond. The averaging advantageously results in less influence by measurement errors of individual temperature sensors. Weighted averaging of several subsignals is also possible.
  • the subcircuit in this embodiment can have a further input which serves to receive a selection signal.
  • the subcircuit determines the temperature signal as a function of the selection signal. For example, for a specific selection signal, the subcircuit can only use the temperature sub-signals for determining the temperature signal, the selected sub-signal inputs described by the selection signal available.
  • the subcircuit can change the way in which it processes the sub-signals into the temperature signal, depending on the selection signal. For example, in embodiments in which it determines the temperature signal by averaging, the subcircuit can change weighting factors of the individual sub-signals as a function of the selection signal.
  • the user can have the subcircuit take into account only sub-signals that correspond to ambient temperatures when determining the temperature signal, and ignore other sub-signals that correspond to LED temperatures, for example.
  • the circuit has an additional input for receiving an actuating signal and changes the current provided as a function of the received actuating signal.
  • the circuit can, for example, change parameters such as the threshold temperature T S , the current I K , the temperature T R , the reduced current I R and / or other parameters of the temperature characteristic as a function of the control signal.
  • the circuit further includes a memory that has different forms of one or more of these parameters, and the circuit uses the actuating signal to select one of these forms.
  • the circuit alternatively or additionally uses the control signal to determine the parameter directly from the control signal.
  • circuit can be used both with temperature sensors which detect an ambient temperature of the luminaire and with those which detect an LED temperature.
  • the user has the option of individually configuring the circuit depending on the arrangement of the temperature sensor, only one type of circuit being necessary.
  • the object is achieved according to the invention by a lighting system, in particular an outdoor lighting system, which comprises a circuit as described above.
  • the lighting system has at least one LED light with at least one LED.
  • the circuit has a supply output, which is still effectively connected to the LED of the lamp in order to supply the LED with electrical current.
  • the lighting system also has a temperature sensor for detecting a temperature.
  • the signal input of the circuit is effectively connected to the temperature sensor.
  • Such an illumination system has the advantage that the temperature signal required for activation is provided within the system itself.
  • temperature-dependent electrical resistances can be used as temperature sensors.
  • NTC (negative temperature coefficient) resistors and / or PTC (positive temperature coefficient) resistors can be used.
  • electronic components can also be used as temperature sensors that deliver a directly electronically processable signal, for example semiconductor temperature sensors that deliver a current proportional to their temperature.
  • the temperature sensor can be connected directly to the signal input of the circuit, so that the temperature signal corresponds to the temperature determined by the temperature sensor.
  • the lighting system can also have a plurality of temperature sensors, each of which is connected to a sub-signal input of the subcircuit of the circuit. The subcircuit is then set up to process the sub-signals in order to determine a temperature signal. This is then used by the circuit to determine the supply current.
  • the temperature sensor of the lighting system is arranged such that it detects an ambient temperature of the lamp.
  • the temperature sensor can thus determine an outside temperature for an outside lighting system.
  • the present invention provides significant technical benefits.
  • the circuit uses the determined ambient temperature to determine the current that it provides at the supply output for the LED. It is particularly useful here if the temperature sensor is arranged so that the temperature determined does not increase significantly as a result of the operation of the LED itself. Thus, a feedback loop is created by heating the temperature sensor during avoid warming up of the LED shortly after switching on.
  • a lower stationary operating temperature of the LED is set at ambient temperatures below the threshold temperature T S , since the heating effect of the LED is reduced by the reduced current. In this way, temperature-dependent aging effects of the LED can also be reduced.
  • the threshold temperature T S at which the first temperature interval and the second temperature interval adjoin one another, is between 0 ° C. and 50 ° C.
  • a threshold temperature T S between 15 ° C. and 35 ° C. is preferred, and in particular a threshold temperature T S of 25 ° C.
  • the circuit in cooperation with a suitably designed temperature characteristic for the first temperature interval, can thus conduct the current in such a way that a luminous flux which corresponds to the desired luminous flux is achieved even at lower temperatures.
  • the circuit can conduct the supply current in such a way that, even at lower ambient temperatures, a luminous flux is set which corresponds to a desired value at 25 ° C.
  • the value for the threshold temperature T S can also be selected differently depending on the thermal connection of the LED.
  • the threshold temperature can be dimensioned such that heating of the LED above a predetermined limit temperature is avoided.
  • the LED is cooled passively. In this case, the operating temperature of the LED when warmed up is above the ambient temperature of the lamp, so that the threshold temperature T S of the circuit is below the predetermined limit temperature for the operation of the LED.
  • the lighting system can also comprise an actively cooled LED. In the cases under consideration, the person skilled in the art can select the threshold temperature T S, for example, taking into account the cooling capacity achieved under application conditions.
  • the temperature sensor of the lighting system is arranged such that it essentially detects a temperature of an LED of the luminaire.
  • the desired effect of temperature compensation and energy saving can also be used for the warm-up phase of the LED.
  • the LED Immediately after the LED is switched on, it has a lower operating temperature, which increases during a period immediately after the LED is switched on until it reaches a temperature which corresponds to a thermally stationary state.
  • an increased luminous flux is avoided during the warm-up phase immediately after the LED is switched on.
  • the duration of this warm-up phase depends, for example, on the thermal connection to the environment, e.g. B. from a heat sink used.
  • This embodiment makes it possible to initially select and increase the current during the warm-up phase in order to compensate for the drop in luminous flux due to the increase in operating temperature.
  • a threshold temperature T S between 25 ° C. and 100 ° C., preferably between 60 ° C. and 80 ° C. and in particular 70 ° C. has proven to be useful in order to prevent the LED from overheating due to an excessively high supply current.
  • the specific value for the threshold temperature T S can be selected, for example, taking into account an aging model for the LED, the desired service life, the specific application conditions and the physical properties of the LED.
  • This embodiment offers the advantage that the temperature relevant for the aging of the LED is recorded directly, so that the threshold temperature can be determined directly from the variables mentioned, without taking into account the thermal connection of the LED.
  • the temperature sensor and the LED can be thermally connected to a metal layer, for example a copper layer, on a printed circuit board, which in turn is thermally connected to the LED, for example via a thermal pad.
  • the temperature sensor can be arranged in close proximity to the LED.
  • a device can be used as the temperature sensor, which determines the infrared portion of the light emitted by the LED.
  • the circuit can have a plurality of sub-signal inputs which are connected to a plurality of temperature sensors of the lighting system.
  • the circuit can be connected in this way both to a temperature sensor that determines an ambient temperature of a lamp and to a temperature sensor that determines an operating temperature of an LED.
  • the subcircuit determines a temperature signal from the sub-signals transmitted by the temperature sensors using a predetermined algorithm.
  • the temperature signal determined can correspond in particular to an effective or an average temperature.
  • an input be provided for a selection signal so that the user can choose whether the circuit uses an ambient temperature or an LED temperature to determine the supply current.
  • the lighting system has at least one additional LED light with at least one further LED, the supply output of the circuit also being connected to the further LED of the additional LED light in order to supply the further LED with electrical current.
  • a system that comprises several lights can be controlled by means of the same circuit. This saves additional control circuits. In particular, this only requires the arrangement of a single temperature sensor. This can be arranged at a suitable location in order to detect an ambient temperature of the system. Alternatively, the temperature sensor can also be arranged to detect the temperature of an LED of one of the lights. The control of several lights with the same circuit and due to the same temperature results in a homogeneous guidance of the lighting level, whereby particularly bright and particularly dark areas are avoided. This is particularly useful when illuminating a larger area with multiple lights, such as a street or a square.
  • the lighting system can also be provided with a means for providing energy, for example with solar cells.
  • a supply of the LED can be provided in addition or as an alternative to another energy source.
  • One advantage arises, for example, when using the lighting system for outdoor lighting. Here, low temperatures in winter often go hand in hand with reduced solar radiation. The power provided by the solar cells is therefore reduced. On the other hand, this also goes hand in hand with a lower supply current required to achieve a desired luminous flux of the LED.
  • Embodiments of the circuit according to the invention are described below using the Figures 1a to 1c described by means of temperature characteristics which describe the current provided by the circuit as a function of the temperature.
  • the Figures 1a to 1c describe embodiments of circuits according to the invention which are particularly suitable for controlling an LED of an outdoor light, the temperature in this case corresponding to an ambient temperature of the light.
  • 350 mA is a value that can typically be used to supply a single LED. If the luminaire comprises several LEDs in a parallel connection, it is expedient in other embodiments to choose a correspondingly higher current, for example to scale the value specified here with the number of LEDs to be controlled.
  • T S 25 ° C
  • the characteristic shows a linear course.
  • the circuit can reduce the current with a different drop, ie the temperature characteristic curve can have a different slope. For example, values from 1 to 3.5 mA / ° C are possible.
  • the temperature effect on the luminous flux of the LED is counteracted.
  • the slope of the current rise in the first interval is chosen such that the temperature dependence of the luminous flux is compensated for as completely as possible.
  • the supply current can be reduced at other temperatures, in particular at higher temperatures T R , for example between 40 ° C. and 150 ° C.
  • the reduction to current levels I R other than 80 mA can take place, e.g. B. to a value between 20 mA and 300 mA per LED to be controlled, or the current can be switched off completely.
  • the characteristic curve shown describes a further embodiment of a circuit according to the invention, the characteristic curve increasing monotonically in the first and second temperature intervals with a slightly progressive increase.
  • the temperature characteristic curve in the first temperature interval and the second temperature interval runs linearly increasing or progressively increasing over both temperature intervals.
  • the embodiment of a lighting system according to the invention shown comprises a circuit 100 with a signal input 110 and a supply output 120.
  • a temperature sensor 10 is connected to the signal input 110 of the circuit 100.
  • the circuit 100 thus receives a temperature sensed by the temperature sensor 10.
  • Circuit 100 uses this temperature to provide a supply current at supply output 120.
  • four LEDs 20 are connected to the supply output 120.
  • only a single circuit 100 is required to operate four LEDs 20.
  • only one temperature sensor 10 is required in the lighting system shown.

Claims (11)

  1. Circuit (100) pour l'alimentation électrique d'un luminaire avec au moins une LED (20) en tant que moyen d'éclairage, le circuit (100) comprenant une entrée de signal (110) pour la réception d'un signal de température et une sortie d'alimentation électrique (120) ou une sortie de signal de commande pour le contrôle d'un dispositif d'alimentation électrique avec une sortie d'alimentation, la sortie d'alimentation (120) mettant à disposition un courant électrique pour l'alimentation de l'au moins une LED (20) du luminaire et
    le signal de température correspondant à une température ambiante du moyen d'éclairage ou à la température du moyen d'éclairage lui-même,
    le circuit (100) mettant à disposition un courant plus faible lorsque le signal de température se trouve dans un premier intervalle de température que lorsque le signal de température se trouve dans un deuxième intervalle de température plus élevé adjacent à une première température seuil (TS), caractérisé en ce que le circuit (100) met à disposition le courant de façon à ce que celui-ci soit indépendant du signal de température lorsque le signal de température se trouve dans le deuxième intervalle de température et le circuit mettant à disposition un courant plus faible lorsque le signal de température se trouve dans un troisième intervalle de température que lorsque le signal de température se trouve dans le deuxième intervalle de température, le troisième intervalle de température étant plus élevé que le deuxième intervalle de température et étant adjacent à celui-ci au niveau d'une deuxième température seuil (TR).
  2. Circuit (100) selon l'une des revendications précédentes, le circuit (100) conduisant le courant le long d'une courbe caractéristique de température prédéterminée lorsque le signal de température se trouve dans le premier intervalle de température, la courbe caractéristique de température étant ascendante de manière monotone dans le premier intervalle de température, de préférence ascendante de manière strictement monotone, et s'étendant plus particulièrement de manière linéaire ou de manière progressivement ascendante.
  3. Circuit (100) selon l'une des revendications précédentes, qui comprend en outre un moyen de mesure d'une tension électrique au niveau de la sortie d'alimentation.
  4. Circuit (100) selon l'une des revendications précédentes, le circuit (100) mettant à disposition un courant continu au niveau de la sortie d'alimentation ou le circuit (100) mettant à disposition un courant pulsé au niveau de la sortie d'alimentation, un courant plus faible correspondant à un rapport cyclique plus petit du courant puisé.
  5. Circuit (100) selon l'une des revendications précédentes, qui comprend en outre un circuit partiel qui comprend plusieurs sous-entrées de signaux, pour la réception de sous-signaux de température, et une sortie de signal, la sortie de signal étant reliée de manière fonctionnelle avec l'entrée de signal du circuit, et le circuit partiel mettant à disposition, au niveau de la sortie de signal, en fonction des signaux de température reçus, un signal de température.
  6. Circuit (100) selon l'une des revendications précédentes, qui comprend en outre une entrée supplémentaire pour la réception d'un signal de réglage, le circuit (100) modifiant le courant mis à disposition en fonction du signal de réglage reçu.
  7. Système d'éclairage comprenant ce qui suit :
    le circuit (100) selon l'une des revendications précédentes, moyennant quoi, au niveau de l'entrée de signal, au niveau de laquelle est appliqué le signal de température qui correspond à la température ambiante du moyen d'éclairage ou une température du moyen d'éclairage lui-même, une sonde de température met le signal de température à disposition,
    la sortie d'alimentation (120) étant reliée de manière fonctionnelle avec l'au moins une LED (20) du luminaire, afin d'alimenter la LED avec un courant électrique.
  8. Système d'éclairage selon la revendication 7 avec une sonde de température (10) pour la mesure de la température ambiante du moyen d'éclairage ou de la température du moyen d'éclairage lui-même, l'entrée de signal (110) du circuit étant reliée avec la sonde de température et
    la sonde de température (10) étant disposée afin de mesurer la température ambiante du luminaire ou la température du moyen d'éclairage lui-même.
  9. Système d'éclairage selon la revendication 8, la première température seuil (TS) étant entre 0 degré Celsius et 50 degrés Celsius, de préférence entre 15 degrés Celsius et 35 degrés Celsius et plus particulièrement de 25 degrés Celsius.
  10. Système d'éclairage selon la revendication 7,
    la première température seuil (TS) étant entre 60 degrés Celsius et 80 degrés Celsius et plus particulièrement de 70 degrés Celsius.
  11. Système d'éclairage selon l'une des revendications 7 à 10, qui comprend au moins une LED supplémentaire (20) ou un luminaire à LED supplémentaire avec au moins une LED supplémentaire (20), la sortie d'alimentation (120) du circuit étant en outre reliée de manière fonctionnelle avec la LED supplémentaire (20), afin d'alimenter la LED (20) avec un courant électrique.
EP11153517.5A 2010-02-05 2011-02-07 Compensation de température du flux lumineux sur des lampes à DEL Active EP2355621B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11153517T PL2355621T3 (pl) 2010-02-05 2011-02-07 Kompensacja temperatury strumienia świetlnego na oprawach oświetleniowych led

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010006998A DE102010006998A1 (de) 2010-02-05 2010-02-05 Temperaturkompensation des Lichtstroms an LED-Leuchten

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EP2355621A2 EP2355621A2 (fr) 2011-08-10
EP2355621A3 EP2355621A3 (fr) 2014-01-01
EP2355621B1 true EP2355621B1 (fr) 2020-04-01

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EP11153517.5A Active EP2355621B1 (fr) 2010-02-05 2011-02-07 Compensation de température du flux lumineux sur des lampes à DEL

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US20140021884A1 (en) * 2012-07-18 2014-01-23 Dialight Corporation High ambient temperature led luminaire with thermal compensation circuitry
DE102012224206A1 (de) * 2012-12-21 2014-06-26 Tridonic Gmbh & Co. Kg LED-Konverter mit Froststart-Funktion
DE102013107520A1 (de) 2013-07-16 2015-01-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. LED-Lampe für eine Leuchte und Betriebsverfahren für diese Leuchte
ITTV20130177A1 (it) 2013-10-24 2015-04-25 Automotive Lighting Italia Spa Fanale per autoveicoli provvisto di un dispositivo di illuminazione a led
DE102013018120B4 (de) 2013-11-29 2022-02-10 Cooper Crouse-Hinds Gmbh Verfahren zur Temperaturüberwachung einer Leuchte
DE102014118440A1 (de) 2014-12-11 2016-06-16 Siteco Beleuchtungstechnik Gmbh Verfahren und Schaltung zur Versorgung eines LED-Leuchtmittels
EP3118279A1 (fr) 2015-07-14 2017-01-18 odelo GmbH Procédé d'exploitation d'oled en tant que sources de lumière dans des phares de véhicules, moyen d'éclairage comprenant des oled en tant que sources de lumière et phare de véhicule équipé de celui-ci
DE102015117852A1 (de) * 2015-10-20 2017-04-20 Technische Universität Darmstadt Verfahren zur Steuerung einer Leuchteinrichtung und Leuchteinrichtung
EP3389340B1 (fr) 2017-04-13 2020-08-26 Valeo Iluminacion Ampoule d'automobile avec compensation du flux lumineux de la source de lumière
CN108521692A (zh) * 2018-03-21 2018-09-11 深圳市富满电子集团股份有限公司 Led照明系统的温度控制方法及led照明系统
FR3085099B1 (fr) * 2018-06-22 2023-06-30 Valeo Vision Dispositif de pilotage de l'alimentation electrique de sources lumineuses d'un vehicule automobile en fonction des variations de leurs temperatures
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EP2355621A2 (fr) 2011-08-10
DE102010006998A1 (de) 2011-08-11
EP2355621A3 (fr) 2014-01-01

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