EP2499882B1 - Circuit pour source lumineuse led - Google Patents

Circuit pour source lumineuse led Download PDF

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Publication number
EP2499882B1
EP2499882B1 EP10788000.7A EP10788000A EP2499882B1 EP 2499882 B1 EP2499882 B1 EP 2499882B1 EP 10788000 A EP10788000 A EP 10788000A EP 2499882 B1 EP2499882 B1 EP 2499882B1
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EP
European Patent Office
Prior art keywords
light
emitting diode
module
circuit
voltage
Prior art date
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Not-in-force
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EP10788000.7A
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German (de)
English (en)
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EP2499882A1 (fr
Inventor
Achim Weil
Björn Bleisinger
Stefan Siebenrock
Ulrich Schmitt
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Schott AG
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Schott AG
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Publication of EP2499882A1 publication Critical patent/EP2499882A1/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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]

Definitions

  • the present invention relates to a light emitting diode module with a circuit arrangement for driving an LED light source, which is particularly suitable for use in the aviation sector.
  • LED light sources are becoming increasingly important in the lighting sector.
  • the relative to conventional halogen lamps relatively high efficiency and associated relatively low heat radiation and the mechanical robustness and longevity of the individual light-emitting diodes are particularly suitable for use in transportation, for example, as lighting means in a passenger cabin in airplanes, ships, railway cars, etc ..
  • spot illumination with a brightness of usually 150-250 lx at a distance of 40-50 cm the LED light sources are particularly well suited as reading lights (in English reading lights) in passenger aircraft.
  • the light-emitting diode allows comparatively diverse possibilities with regard to a functional design and the installation location of a respective luminaire.
  • the conventional halogen reading lights are replaced in the overhead area by LED reading lights, which are preferably attached with a gooseneck directly to a passenger seat and have an LED module in a light bulb head.
  • LED reading lights Such a reading light is characterized in particular by the Pivoting and an associated flexible alignment of a light cone.
  • the light-emitting diodes of a respective LED module generally require a driver circuit for setting a suitable operating point, with which a voltage provided from a vehicle electrical system is adapted to the forward voltage of an LED and which constantly controls the diode current.
  • LED modules In the field of aviation (in English aviation) are in general high demands on the electrical and electronic equipment in terms of EMC (Electromagnetic Compatibility) provided. Conducted disturbances, as well as space disturbances, must meet the requirements of the aviation standards of, for example, the RTCA-DO160 or customer specifications such as Boeing's D6-36440 or Airbus ABD0100.
  • Known LED modules therefore generally include linear voltage regulators, which convert a voltage difference between the diode forward voltage and the provided vehicle electrical system voltage into power loss.
  • limit values must also be observed by the standards mentioned. For example, the touch temperature of an aluminum enclosure of an LED module may exceed the ambient temperature by a maximum of 7 ° C.
  • ISPS in-seat power supplies
  • USB universal serial bus
  • a currently used in aviation LED module with a linear voltage regulation is, taking into account a maximum tolerable power loss in each case only for a certain nominal voltage used.
  • the LED lights designed for 28 V operation are preferably equipped with a multi-LED module, which contains several light-emitting diodes connected in series. The series connection of several LEDs allows a larger voltage drop, so that the linear voltage regulator has to absorb less power loss.
  • 1-LED modules can only be used in the aviation sector for small supply voltages. Compared to the multi-LED modules, they are characterized by a more homogeneous brightness distribution in their light cone, so that their use is desirable even at higher voltages.
  • a major disadvantage of the known LED lights is that for each of the different vehicle electrical systems, ie for the different voltage ranges, a separate LED module with an adapted LED configuration and an adapted voltage regulator can be developed got to. This is particularly disadvantageous in view of the time and technically complicated acceptances or tests for aviation approval. In addition, it is important to consider special requirements for a direct operation on a vehicle electrical system with regard to a permanent as well as a short-term overvoltage.
  • US 2006 / 0220570A1 shows a cost-effective module for powering LEDs.
  • a charge-carrier pump arrangement With a charge-carrier pump arrangement, the voltage drop of a DC battery is to be compensated and, as a result, the supply voltage is increased when the battery voltage drops.
  • the charge pump arrangement When the battery voltage is sufficiently high, the charge pump arrangement is bridged by a bypass to avoid unwanted losses in this battery operated system.
  • this arrangement compensates for a voltage range of approximately 3.4 to 4.2 V, which is completely unsuitable for the purposes of the aviation industry, for example.
  • US 2008/0054862 A1 describes an electronic device with a DC power supply in which the Voltage of a feeding battery is controlled by suitable converter for a load to be supplied.
  • an LED driver in the US 2006/0109205 A1
  • the charge pump can be switched between three operating modes.
  • the present invention proposes a light-emitting diode module comprising a housing and at least one printed circuit board, wherein the housing is preferably made of aluminum or a flame retardant plastic.
  • the printed circuit board has at least one light-emitting diode, an LED driver and a drive module, as well as a circuit arrangement.
  • the LED driver provides a constant operating point for pulsed operation of the LED controlled by the drive module.
  • the circuit arrangement comprises an input for switching on a first voltage and a DC / DC converter and a bypass connected in parallel with the DC / DC converter, which can be activated by means of a comparator circuit.
  • the drive module on the one hand be designed as a PWM module. This allows vorteihaft a dimming of the LED.
  • the drive module on the other hand is designed as a mechanical switch or button or can be actuated by means of a separate switch or button or via an external switching input.
  • the switch or pushbutton can be designed on the one hand as a mechanical switch or pushbutton or as a semiconductor switch, which can be controlled by means of a ⁇ -switch. Due to the very low switching currents, it is possible with advantage to use very small ⁇ switches, such as, for example, a switch such as the OMRON switch type D3SH.
  • the comparator circuit is preferably arranged between the input and the down converter module, and configured to detect the height of an input voltage of the circuit arrangement and to compare it with a first and second threshold value.
  • Comparator circuit is further adapted to control the transistor for activating the bypass when falling below the first threshold value and to control the transistor for deactivating the bypass when the second threshold value is exceeded.
  • the present invention thus provides over the prior art, a universal light-emitting diode module, which can be used as a light source in various lighting devices in aviation technology.
  • the very complex approval procedure for such electronic components is therefore only once again, which is particularly advantageous in view of the low numbers typical for aeronautical engineering.
  • the wide voltage range of the light-emitting diode module additionally offers the decisive advantage that fluctuations in the supply voltage provided on the electrical system side without Brightness fluctuations are processed by the light source. If, for example, in the case of a generator failure, the vehicle electrical system voltage drops from 28 V to 24 V in battery mode, the light-emitting diode module according to the invention also provides its full light intensity in emergency mode, as a result of which it is preferably also suitable as an entry light.
  • An advantageous embodiment provides for using a DC / DC converter in the form of an integrated down-converter module.
  • the invention provides to expand the printed circuit board of the light emitting diode module as a multi-part printed circuit board, wherein the individual printed circuit board sections are interconnected by flexible conductor track sections.
  • the Leiteplattenabitese can thus be folded in the housing of a light emitting diode module to be installed and take only a maximum volume of 12 cm 3 a.
  • the circuit arrangement includes an overvoltage protection circuit which includes a field-effect transistor which limits the supply voltage in the event of overvoltage.
  • suppressor diodes react very quickly to overvoltages, but can absorb relatively little energy, although varistors react somewhat more slowly, but can absorb more energy for this purpose.
  • a plurality of suppressor diodes and / or varistors are arranged on the light emitting diode and on further components of the LED board on the output side and / or input side between the input and the first filter circuit and / or between the input and the LED driver.
  • protection against overvoltages e.g. due to RADAR radiation, EMPs or the like, induced / coupled between the LED board and the motherboard.
  • FIG. 1 the block diagram of a wide-range voltage module is shown, which is comprised by a light-emitting diode module according to the invention with a 1-LED light source.
  • the light-emitting diode module fulfills the requirements of the RTCA-DO160E and is thus particularly suitable as a reading lamp or as cabin lighting in the aviation sector.
  • the illustrated wide-range voltage module includes an input terminal pair X1.3 and X1.2, to which a 4.5 V to 32.5 V DC voltage is provided from a vehicle electrical system.
  • the module comprises a single high-performance light-emitting diode D11, which is operated with an LED driver U4 and a driver module, dimmable.
  • the brightness can be adjusted via a push-button or switch 12 or via an external operating unit that can be connected to the connection X1.1.
  • a DC / DC converter U1 with a parallel-connected bypass 11 provides a DC voltage in the range between 4 V and 8 V for the supply of the drive module and the LED driver ready.
  • a filter and protective circuit is provided, with which overvoltages and high-frequency interference are filtered.
  • the FIG. 2 shows a detailed circuit diagram of a wide-range voltage module.
  • the circuit shown can be essentially divided into two parts, the upper portion of a power supply circuit S1 shown, at the output of a voltage UA between 4 V and 8 V DC is ready, and the universal at any Input voltage can be operated in a voltage range of 4.5 V to 32.5 V DC.
  • an LED driver circuit is shown, which includes all devices for brightness regulation of the high-performance LED D11.
  • the power supply circuit S1 has input side via a three-pin connector X1, wherein at two of the electrical contacts X1.3 and X1.2 an input voltage is provided.
  • This input voltage can be a 5 V DC voltage from an in-seat power supply (ISPS), with which, for example, in a passenger seat integrated infotainment systems are powered locally; or a 28 V DC, which is typically provided by a vehicle electrical system in a cabin of a commercial aircraft and serves to supply a variety of electrical consumers.
  • Terminal X1.2 provides the ground potential (GND) for the circuit, the positive one Input voltage potential is applied to terminal X1.3, whereby this live input line is protected against overcurrents by a fuse SI1.
  • the power supply circuit S1 has in its input area over-voltage protection, which is suitable for filtering transient voltage spikes, which could be caused, for example, by switching operations within the vehicle electrical system.
  • the overvoltage protection is preferably designed as a bidirectional suppressor diode whose operating or breakdown voltage is designed for the maximum input voltage of the voltage supply circuit.
  • Bidirectional ESD Protection Diodes can also be used, as these diodes also provide very fast reaction times with low power losses.
  • the diode D18 is such a Bidirectional ESD Protection Diode.
  • the output of power supply circuit S1 is preferably powered by a 4V DC voltage provided by a DC / DC down converter.
  • the invention proposes to provide a down converter, which is completely constructed as an integrated circuit U1 and must be additionally connected on the input and output side with the ground capacitors C4, C5.
  • the output voltage of the buck converter is connected to the Resistor R5 set.
  • the resistor R17 provides a base load for the buck converter.
  • the necessary inductance is also integrated. Due to the short lines within the interconnect level of an IC, the spurious emission typically caused by a transducer can be minimized so that only the conducted disturbances from the IC need to be reduced to aviation requirements.
  • a first filter S2 is provided in the voltage supply circuit S1, which is arranged on the input side after the suppressor diode D5 and constructed from the components C2, C17 and L2.
  • An additional second filter S5 is provided directly at the voltage input of the converter and comprises the capacitances C1 and C3 as well as the inductance L1.
  • the presently known integrated down-converters U1 require an input voltage of at least 7 V.
  • a bypass circuit is provided, with an input voltage up to about 4 V directly through the MOS transistor V1 can be switched to the output, provided that it has a voltage below 7V.
  • the transistor V1 is controlled by a comparator circuit S4, which detects the applied input voltage and compares a threshold value, below which the bypass is switched.
  • the transistor V4 is coupled via the voltage divider with the resistors R3 and R8 to the input circuit, wherein the voltage divider is dimensioned such that the transistor in the entire input voltage range of 4.5 V to 32.5 V is conductive and a voltage for the transistor V5 provides.
  • the capacitance C16 is provided which, for high-frequency signals which superimpose the input DC voltages, alters the divider ratio of the voltage divider such that the voltage drop across the parallel form of R3 and C16 drops below the threshold voltage of the transistor V4, thus blocking it becomes.
  • the detection of the switching threshold for the input voltage of the present voltage supply circuit S1 is provided by the transistor V5, the resistors R2 and R6 and the Zener diode D7.
  • a voltage which is sufficiently high for switching on the transistor R2 drops across the resistor R2, which is connected in parallel with the base-emitter diode of the transistor V5. If the voltage drops below 7.5 V, the transistor V5 is turned off and the gate potential of the transistor V1 is pulled to ground (GND).
  • the thus applied negative gate-source voltage which is below the threshold voltage of the PMOS transistor V1 lets the transistor through, so that the bypass circuit is activated.
  • a resistor R1 is connected to the resistors R2 and R6 of the Switching threshold detection is connected .
  • the resistor R1 with the resistor R2 is a parallel circuit, so that the divider ratio is changed in the switching threshold detection such that to re-conductive of the transistor V5 must have an input voltage of at least 8V.
  • a hysteresis is provided which is about 0.5 V and in the transition region, an uncontrolled toggling, similar to that of an astable multivibrator, effectively suppresses the bypass circuit in the event that an input voltage should be in the range of the switching threshold.
  • two decoupling diodes D1 and D2 are provided, which decouple the bypass circuit and the converter module from each other.
  • Voltage supply circuit thus provides a voltage between 4 V and 8 V DC, which is provided as a function of the input voltage via the converter module or via the bypass circuit.
  • a drive circuit for a 1-LED light source is shown.
  • This comprises an LED driver module U4, which operates the LED D11 pulsed at a constant operating point of their U / I characteristic and is operated directly with a voltage of 4 V to 8 V DC from the power supply circuit.
  • the basic setting of the LED current is carried out by means of the resistors R15 and R16, which have a basic brightness of Specify LED D11.
  • This basic brightness of the light-emitting diode D11 can be changed via a variable PWM signal, which is provided to the driver module by a PWM module.
  • This PWM module can be provided, for example, in the form of a microcontroller U5, wherein a value for a desired LED brightness can be set via a push-button 12.
  • the microcontroller U5 is supplied with a 3 V DC voltage from a voltage regulator component U6, from which also the processing voltage for a driver circuit U2 is provided.
  • the driver circuit U2 drives a standard LED, which is integrated as lighting means in the button 12.
  • the terminal X1.1 of the wide-range voltage module allows setting or changing the brightness of an external second operating unit, which has an identical function to the button 12.
  • FIG. 3 A circuit diagram of a further embodiment of the light-emitting diode module is shown in FIG. 3 shown.
  • the circuit arrangement (S1) includes an overvoltage protection circuit (S3a), which includes a field effect transistor (V2) Fig. 3 ), which limits the supply voltage in the event of overvoltage.
  • S3a overvoltage protection circuit
  • V2 Fig. 3 field effect transistor
  • the downstream components can be safely protected against overvoltages during operation on the electrical system even with a longer applied overvoltage and increased availability of the light emitting diode module is guaranteed even in case of failure.
  • the illustrated light emitting diode module is arranged between the input (X1) and the first filter circuit (S2) at least one suppressor diode D5, at least one varistor or a combination of suppressor diodes and varistors, which are not shown except the diodes D5 in the drawings. Instead of or in addition to the diodes D5, these varistors may be incorporated. If these varistors are used in addition to the diodes D5 in the circuit, they are connected in parallel to these diodes D5.
  • these diodes D5 may also be bidirectional ESD protection diodes, such as those sold under the name PESD5V0S1BA / BB / BL by Phillips Semiconductors.
  • FIG. 3 shows by way of example with the circuit U4 'a driver circuit for the diode D12, which switch backlighting is used.
  • FIG. 4 shows, by way of example, three suppressor diodes D5, which are connected in parallel with the light-emitting diode D11, parallel to the switch or push-button 11 and parallel to the light-emitting diode D16, which serves for the key illumination.
  • the low emission of electromagnetic interference required in the aviation sector is ensured by an aluminum housing which is grounded at low impedance and picks up the circuit with the light-emitting diode.
  • the housing can be installed with the entire circuit in a preferred embodiment in a 12 cm 3 head of a reading light.
  • the housing can also be made of a flame-retardant plastic.
  • FIG. 5 shows a light-emitting diode module 30 with axial light exit opening.
  • the module 30 comprises a housing 41 made of aluminum, with a light-emitting diode D11 and a lens 32.
  • the electronic circuit with the wide-range voltage module is constructed of two printed circuit boards 10a and 10b, which are electrically and mechanically connected to a flexible portion, not shown, and thus forming a foldable printed circuit board unit.
  • FIG. 6 shows an alternative light emitting diode module 40 having a radially aligned light exit opening with a lens 42.
  • the power supply circuit S1 additionally includes a prescribed reverse polarity protection circuit S3 arranged in front of the comparator circuit S4 in the circuit diagram.
  • a reverse polarity protection is realized by a diode connected in the load circuit.
  • the MOS transistor V3 is switched into the load circuit, at which a much lower voltage and power dissipation drops in the passband.
  • the voltage drop is controlled by the Zener diode D3.
  • the measured characteristic curves are each compared with the permissible limit values according to the D6-36440 specification.
  • Figure 7a shows the emission of a light-emitting diode module at full light power and a supply voltage of 5 V.
  • FIGS. 7b to 7d The in the FIGS. 7b to 7d The measurements shown were each carried out at a voltage of 28 V.
  • FIG. 7b and 7d show the spectra at full luminosity, wherein in the diagram 7d the wide-range voltage module was measured without housing.
  • FIGS. 8a to 8d show the conducted interference emissions of the light-emitting diode module.
  • the diagram 8a shows the spectrum at an input voltage of 5 V
  • the diagrams 8b to 8d show the respective frequency spectrum at an input voltage of 28 V DC.
  • the measurements taken in the FIGS. 8a and 8b were performed at full light output of the light emitting diode module.
  • FIG. 9 represents the stability of the brightness of a light emitting diode module as a function of the input voltage from 3.7 V to 35 V, which shows only surprisingly small brightness changes.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Claims (16)

  1. Module de diode électroluminescente, indiquée comme source lumineuse à diode électroluminescente dans des réseaux de bord pour l'aéronautique, comprenant un boîtier (31, 41), au moins une diode électroluminescente (D11) et au moins une plaque de circuit imprimé (10a, 10b), la plaque de circuit imprimé étant reliée à l'au moins une diode électroluminescente (D11) et présentant une commande de LED (U4), un composant de commande (U5) ainsi qu'un circuit (S1), la commande de LED (U4) générant un point de fonctionnement constant en courbe caractéristique U/I pour un fonctionnement de la diode électroluminescente (D11) commandé par le composant de commande (U5), et le circuit (S1) comprenant un convertisseur continu-continu (U1), caractérisé en ce que le convertisseur continu-continu (U1) est un composant de convertisseur abaisseur intégré, le circuit (S1) comprenant en outre une dérivation (11) montée en parallèle au composant de convertisseur abaisseur intégré (U1), laquelle est activable au moyen d'un circuit comparateur (S4), ledit circuit comparateur (S4) étant prévu pour détecter le niveau d'une tension d'entrée appliquée sur le circuit (S1) et pour activer la dérivation si une valeur seuil n'est pas atteinte, et désactiver la dérivation si ladite valeur seuil est dépassée.
  2. Module de diode électroluminescente selon la revendication précédente, caractérisé en ce que le circuit comparateur (S4) comprend au moins un premier transistor (V5), une première résistance (R2), une deuxième résistance (R6) et une diode Z (D7), la première résistance (R2) étant montée en parallèle à la diode émetteur-base du premier transistor (V5), et générant un rapport de division avec la deuxième résistance (R6), si bien qu'en cas de tension d'entrée supérieure à la valeur seuil appliquée sur la première résistance (R2), une tension émetteur-base suffisante pour l'activation du premier transistor (V5) chute, et que le premier transistor (V5) se bloque et active la dérivation si la valeur seuil n'est pas atteinte.
  3. Module de diode électroluminescente selon la revendication précédente, caractérisé en ce que le circuit comparateur (S4) comprend une troisième résistance (R1) reliée à la première résistance (R2) et à la dérivation (11), si bien que la troisième résistance (R1) forme un montage en parallèle avec la première résistance (R6) dès que la dérivation est activée, de manière à modifier le rapport de division et à élever en conséquence la valeur seuil pour la désactivation de la dérivation.
  4. Module de diode électroluminescente selon la revendication 2 ou 3, caractérisé en ce que le circuit comparateur (S4) est pourvu d'un dispositif à circuit comprenant un deuxième transistor (V4), un diviseur de tension et un condensateur (C16), ledit condensateur (C16) étant prévu pour désaccorder le diviseur de tension en cas de signaux à haute fréquence interférant avec la tension d'entrée, de manière à bloquer une alimentation en tension pour le premier transistor (V5).
  5. Module de diode électroluminescente selon l'une des revendications précédentes, caractérisé en ce que la dérivation (11) est pourvue d'un transistor à effet de champ (V1), dont la grille est activable par le circuit comparateur (S4).
  6. Module de diode électroluminescente selon l'une des revendications précédentes, caractérisé en ce que le composant de commande (U5) est réalisé comme composant PWM ou comme commutateur à semi-conducteur, le composant de commande étant actionnable au moyen d'un commutateur ou d'un bouton séparé ou par une entrée de commutation externe, ou en ce que le composant de commande est réalisé comme commutateur mécanique.
  7. Module de diode électroluminescente selon l'une des revendications précédentes, caractérisé en ce que le circuit (S1) inclut un circuit de protection contre les surtensions (S3a) comprenant un transistor à effet de champ (V2) qui limite la tension d'alimentation en cas de surtension.
  8. Module de diode électroluminescente selon l'une des revendications précédentes, caractérisé en ce que le circuit (S1) inclut un circuit de protection contre une inversion de polarité (S3) comprenant un transistor à effet de champ (V3), une diode (D3) et une résistance (R7), le transistor à effet de champ (V3) étant disposé entre une entrée (X1.3) du circuit (S1) et le circuit comparateur (S4).
  9. Module de diode électroluminescente selon la revendication précédente, caractérisé en ce que le circuit (S1) comprend un premier circuit de filtrage (S2) disposé entre l'entrée (X1.3) et le circuit comparateur (S4).
  10. Module de diode électroluminescente selon la revendication précédente, caractérisé en ce que le circuit (S1) comprend un deuxième circuit de filtrage (S5) disposé entre le convertisseur continu-continu (U1) et le circuit comparateur (S4).
  11. Module de diode électroluminescente selon l'une des deux revendications précédentes, caractérisé en ce qu'au moins une diode Transil et/ou au moins un varistor sont disposés entre l'entrée (X1.3) et le premier circuit de filtrage (S2).
  12. Module de diode électroluminescente selon l'une des revendications 9 à 11, caractérisé en ce que plusieurs diodes Transil et/ou varistors sont disposés sur la diode électroluminescente (D11) ainsi que sur d'autres composants de la platine LED côté sortie et/ou côté entrée entre l'entrée (X1.3) et le premier circuit de filtrage (S2) et/ou entre l'entrée (X2) et la commande de LED U4.
  13. Module de diode électroluminescente selon l'une des revendications 5 à 12, caractérisé en ce qu'une première diode (D1) est prévue entre une sortie (UA) du circuit (S1) et le transistor (V1), et en ce qu'une deuxième diode (D2) est prévue entre la sortie (UA) et le composant de convertisseur (U1).
  14. Module de diode électroluminescente selon l'une des revendications précédentes, caractérisé en ce que la plaque de circuit imprimé est une plaque de circuit imprimé rigide en plusieurs parties, les parties de plaque de circuit imprimé étant raccordées entre elles par des segments de pistes conductrices flexibles et étant mises en place pliées dans le boîtier.
  15. Utilisation d'un module de diode électroluminescente selon l'une des revendications 1 à 13, caractérisée en ce que ledit module de diode électroluminescente est destiné à des usages aéronautiques et est utilisé en particulier dans des lampes de lecture ou des agencements de sources d'éclairage pour le couplage lumineux dans des supports conducteurs lumineux.
  16. Utilisation d'un module de diode électroluminescente selon l'une des revendications 1 à 13, caractérisée en ce que ledit module de diode électroluminescente est utilisé dans des appareils de technique médicale ou destiné à ceux-ci.
EP10788000.7A 2009-11-13 2010-11-15 Circuit pour source lumineuse led Not-in-force EP2499882B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009052836A DE102009052836A1 (de) 2009-11-13 2009-11-13 Schaltungsanordnung für eine LED-Lichtquelle
US26151809P 2009-11-16 2009-11-16
PCT/EP2010/006934 WO2011057813A1 (fr) 2009-11-13 2010-11-15 Circuit pour source lumineuse led

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EP2499882A1 EP2499882A1 (fr) 2012-09-19
EP2499882B1 true EP2499882B1 (fr) 2015-01-07

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EP10788000.7A Not-in-force EP2499882B1 (fr) 2009-11-13 2010-11-15 Circuit pour source lumineuse led

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US (1) US9516711B2 (fr)
EP (1) EP2499882B1 (fr)
CN (1) CN102714895B (fr)
DE (1) DE102009052836A1 (fr)
WO (1) WO2011057813A1 (fr)

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DE102011087015B4 (de) 2011-11-24 2017-11-16 Airbus Operations Gmbh Energieversorgungssystem, Luft- oder Raumfahrzeug und Verfahren
CN203215316U (zh) * 2013-02-07 2013-09-25 东林科技股份有限公司 可调光的发光二极管灯具
US20150022087A1 (en) * 2013-07-16 2015-01-22 GE Lighting Solutions, LLC Method and apparatus for providing supplemental power in a led driver
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CN102714895A (zh) 2012-10-03
CN102714895B (zh) 2015-11-25
EP2499882A1 (fr) 2012-09-19
DE102009052836A1 (de) 2011-05-19
US9516711B2 (en) 2016-12-06
WO2011057813A1 (fr) 2011-05-19
US20120319612A1 (en) 2012-12-20

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