WO2010125053A1 - Circuit de ballast régulé en puissance pour un luminaire, et procédé de fonctionnement - Google Patents

Circuit de ballast régulé en puissance pour un luminaire, et procédé de fonctionnement Download PDF

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Publication number
WO2010125053A1
WO2010125053A1 PCT/EP2010/055610 EP2010055610W WO2010125053A1 WO 2010125053 A1 WO2010125053 A1 WO 2010125053A1 EP 2010055610 W EP2010055610 W EP 2010055610W WO 2010125053 A1 WO2010125053 A1 WO 2010125053A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
operating
circuit
power loss
control
Prior art date
Application number
PCT/EP2010/055610
Other languages
German (de)
English (en)
Inventor
Christian Nesensohn
Original Assignee
Tridonic Gmbh & Co Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tridonic Gmbh & Co Kg filed Critical Tridonic Gmbh & Co Kg
Priority to DE112010001791T priority Critical patent/DE112010001791A5/de
Priority to CN2010800190612A priority patent/CN102428761A/zh
Priority to EP10716534.2A priority patent/EP2425684B1/fr
Publication of WO2010125053A1 publication Critical patent/WO2010125053A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2825—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage
    • H05B41/2828—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage using control circuits for the switching elements
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • 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
    • H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules

Definitions

  • the invention relates to a power-controlled operating circuit for a lighting means with means for determining a power-related actual value with the circuit-specific power loss, with a controller to which a power actual value and a power setpoint are supplied and which generates a control difference.
  • the invention further relates to a method for operating a power-controlled operating circuit for a light source, wherein a power-related with the circuit-specific power loss actual power value is determined by means of one or more of the performance yielding parameter and compared with a power setpoint, and wherein with a by the control difference obtained the comparison is controlled a large, which determines the power supplied to the bulbs.
  • Power-controlled operating circuits of the aforementioned type are widely used in electronic ballasts for lighting.
  • the actual power value associated with the circuit-specific power loss is compared with a predetermined setpoint power.
  • the resulting control difference is used as a control value for the inverter frequency. Due to unavoidable manufacturing tolerances of the components, the circuit-specific power dissipation is different from device to device. Without countermeasure this has the consequence that the light output of the light sources operated with such power-controlled operating circuits is different despite equal power setpoints.
  • ballasts It is known for a certain type of ballasts to first measure the lamp current at each device after its completion in the production station and to use a matched resistance corresponding to the measured value in the lamp circuit. In this way it is achieved that all devices after leaving the production point under otherwise identical conditions also have a same lamp current, which ensures that even the light bulbs operated with it give the same light output under the same conditions.
  • ballasts also to measure immediately after completion in the production of the difference between a predetermined setpoint power and the measured actual value performance and to digitize the measured value.
  • the digitized measured value is then stored by means of an external programming device in the ASIC, with which the operating circuit is at least partially realized.
  • the invention is therefore based on the object to outsource the elimination of the influence of the circuit-specific power loss of a power-controlled operating circuit from the production process and to automate as much as possible.
  • the invention further relates to an integrated control circuit, in particular ASIC, microcontroller or hybrid version thereof, which is designed to carry out a method according to one of the preceding claims, as well as an operating device for
  • Illuminant comprising such a control circuit.
  • the solution according to the invention for both the operating circuit and the method is that each operating circuit or each ballast, by incorporating such an operating circuit or implementing such a method, first of all activates a preliminary operation in the field after being switched on. Must go through routine.
  • the circuit-specific power loss is first determined in a first phase.
  • the control parameters, ie the measured actual value power or the predetermined setpoint power or the control difference determined from the comparison is corrected or modified in such a way that the power loss no longer has any influence on the control result.
  • the power loss is either added to the setpoint power or subtracted from the actual power or added to the control difference.
  • the power loss is thus calculated from the calculation process for the control difference.
  • the light output of the light source therefore always corresponds to the setpoint power. This is - with otherwise the same preconditions - the light output of bulbs that are operated with such corrected power-controlled operating circuits, always the same.
  • the measurement of the power loss during the pre-routine is carried out according to a first possibility with the regular operating parameters for the light source before it absorbs useful power for light emission in a time-starting process. It is known that certain light sources, in particular gas discharge lamps after switching on the operating circuit ignite only with a certain time delay before they absorb useful power for light emission. If one measures the actual powers within this phase, then the measurement result represents the power loss of the operating circuit.
  • a second possibility is that at least one operating parameter for the lighting means is selected such that the lighting means can not absorb any useful power for emitting light.
  • an operating parameter can be, for example, a Be inverter frequency. This can either be so much lower than the resonant frequency of the resonant circuit or be so much higher than the latter, that the operating voltage for the lamp is not sufficient for the lamp can absorb useful power for light emission. In the case of a gas discharge lamp, this means that the operating voltage is below the ignition voltage. In the case of a light emitting diode there is no recording of useful power, provided that the operating voltage is less than the breakdown voltage of the light emitting diode.
  • a third possibility may be to replace the bulbs with a known substitution resistance.
  • the operating circuit contains an inverter, then in this case, the inverter frequency can assume a value at which normally an ignition of the gas discharge lamp or a breakdown of the light emitting diode were carried out.
  • the measured power loss is then composed of the power loss of the operating circuit and the power loss of the substitution resistor.
  • the operating voltage across the substitution resistance or the current through the substitution resistance is additionally measured, then one can calculate the power loss of the substitution resistance, since its resistance value is known. In order to determine the power loss of the operating circuit, then the calculated power loss of the substitution resistance must be subtracted from the measured power loss.
  • the method of determining the power loss of the operating circuit using a substitution resistor has the advantage that the choice the inverter frequency during the pre-Routme- phase in which the power loss of the operating circuit is to be measured, subject to no restriction. This is important because the power dissipation of the operating circuit in this example is frequency dependent. This means that the correction values for the control parameters must also be frequency-dependent if the desired independence from the power loss is to apply for each operating frequency.
  • a first approximation of the desired goal is possible in that the measurement of the power loss in the pre-routine phase is carried out at a fixed frequency, which is chosen so that the operated with the operating circuit bulbs does not absorb useful power for light emission.
  • a further approximation is possible by measuring the power loss at a plurality of such frequencies, all of which are still in the frequency range at which the luminous means does not yet absorb any useful power for the light emission. Because of the plurality of measured values, extrapolation can then take place into those frequency ranges at which the luminous means normally absorbs useful power for light emission. The measured values and the extrapolation values can be recorded in a table, which is then queried in the control process to correct the relevant control parameter.
  • substitution resistance With the use of the substitution resistance, it is then possible to more accurately measure the frequency dependence of the power loss over the entire frequency range of interest Way to determine as a continuous function.
  • the function values of this function are then stored as well as the individual values or the extrapolation values and can be queried to correct the relevant control parameter.
  • the correction of the control parameters then takes place in an operating phase following the pre-routine phase, during which the light-emitting means absorbs useful power for light emission.
  • Figure 1 shows a first schematic embodiment of the power-controlled operating circuit for a gas discharge lamp, in which the power setpoint corrected and the power loss is measured and stored only at one frequency;
  • FIG. 2a shows a second schematic embodiment of the power-controlled operating circuit for a light-emitting diode, in which the power actual value is corrected and the power loss at several frequencies is measured and then extrapolated and stored;
  • FIG. 2b shows a modification of the embodiment of FIG. 2a,
  • FIG. 3 shows a third diagrammatic embodiment of the power-controlled operating circuit, again for a gas discharge lamp, in which the control difference is corrected and the power loss as a function of the frequency is measured and stored using a substitution resistor, and
  • Fig. 4 shows an example of the application of the invention to a DC-DC converter (here a buck converter or Buck converter) shown.
  • a DC-DC converter here a buck converter or Buck converter
  • the operating device can have a DC-DC converter and / or an inverter (DC / AC converter).
  • DC / AC converter DC / AC converter
  • the bulbs can be operated with AC or DC voltage within the scope of the invention.
  • Gemass of the invention therefore, a DC voltage converter or any other switching controller topology can be used.
  • FIG. 1 shows an operating circuit 1 for a gas discharge lamp LP.
  • an inverter formed by a half-bridge, which consists of a Se ⁇ enscaria of two switched in push-pull electronic switches Sl, S2 and a shunt resistor Rl.
  • This series circuit is powered by a DC voltage, which is characterized by a positive pole + and ground is marked.
  • the DC voltage is normally generated from the AC mains by rectification and smoothing.
  • a series resonant circuit is coupled, which is formed by an inductance L and a resonance capacitor Cl.
  • the series resonant circuit is located between the connection point of the two switches Sl, S2 and ground.
  • the voltage drop across the resonant capacitor Cl is supplied via a coupling capacitor C2 to a gas discharge lamp LP.
  • a series circuit of two resistors R2, R3 is connected in parallel, whose task will be described later in connection with Figure 3.
  • the two switches Sl, S2 of the inverter are controlled by a variable oscillator with a switching frequency f s , such that one switch is open and the other is closed.
  • a voltage dependent on the switching frequency f s arises above the resonance capacitor C 1. This can reach well over 1000 volts in the vicinity of the resonance frequency as a function of the circuit losses of the components for the operation of a gas discharge lamp.
  • the gas discharge lamp LP ignites and absorbs useful energy for emitting light.
  • the operating voltage is usually considerably lower.
  • the gas discharge lamp LP can be dimmed. Dimming is carried out with simultaneous power control. For example. via a bus 7, the operating circuit is next to a signal to and turn off a power set point P so ii supplied.
  • the power setpoint P so ii is normally compared in a controller 3 with a measured actual power value P lst .
  • the actual power value P lst is obtained in this example by means of the voltage drop across the shunt resistor Rl as a power-reproducing parameter (indirectly).
  • the controller 3 From the comparison of power set point Ps o ii and the power actual value P lst , the controller 3 forms a control difference P d i ff / which is the variable oscillator 2 as a control value for the switching frequency for f s is supplied.
  • the power control provides a power-determining size, which may be, for example, the timing of one or more switches (in this example: frequency of clocking the switch of the inverter) of a DC-DC converter or an inverter.
  • the object of the invention is therefore to eliminate or compensate for the power loss from the control process, so that the light output from the gas discharge lamp LP always corresponds to the predetermined power setpoint P so ii, regardless of the individual operating circuit, or the Ballast in which this operating circuit is used.
  • the actual power loss P v is measured and used to correct the power setpoint by increasing it by the power loss P v .
  • the corrected power setpoint Psoii (korr) is equal to the sum of the predetermined setpoint P S oii and the measured power loss P v -
  • the actual power loss P v is measured in the embodiment shown in Figure 1 at a switching frequency f s , which predetermines a processor 6 for a Vorab routine the variable oscillator 2 for the switching frequency f s .
  • This frequency is a fixed frequency and chosen so that the thereby falling voltage at the resonant capacitor Cl is not or no longer sufficient to cause the gas discharge lamp LP to absorb useful energy for light emission. If the switching frequency f s lies in the inductive range of the resonance curve, this means that the gas discharge lamp does not yet ignite at this frequency. If the switching frequency f s is in the capacitive range of the resonance curve, this means that the gas discharge lamp LP - after it was in operation - no longer emits light. Due to the fact that the gas discharge lamp LP is inoperative, the voltage drop across the shunt resistor Rl then gives the power loss of the operating circuit 1. The measured power loss P v is fed to a memory 5.
  • the processor 6 causes the oscillator 2 to change the switching frequency f s so that the Gas discharge lamp LP ignites or ignites again.
  • a voltage drops across the shunt resistor R 1, which voltage represents the sum of the actual power loss P v of the operating circuit 1 and the power consumed by the gas discharge lamp LP for the light emission.
  • This voltage is fed to the controller as power actual value P lst .
  • the power set point in block 4 is corrected by increasing it by the stored actual power loss P v . Accordingly, a corrected set value P is supplied ii (corr) to the controller as setpoint value, which is compared with the actual value P lf.
  • the embodiment of the power-controlled operating circuit according to Figure 2a differs from that of Figure 1 in that here not the power setpoint, but the actual power value is corrected.
  • the same components or function blocks have the same reference numerals.
  • the power loss P v is measured by means of the voltage drop across the shunt resistor Rl in a pre-routine phase and stored in a memory 15.
  • the power loss P v is frequency dependent, here are several power loss values at different frequencies measured and stored in the memory 15.
  • all frequencies are - as in the case of Figure 1 - chosen so that the light source, which is here a light emitting diode LD, which is connected in series with a series resistor R14, still no useful energy for light emission receives.
  • the operating voltage at the light-emitting diode LP is still below the breakdown voltage of the light-emitting diode.
  • additional loss power values are extrapolated from the measured power loss values for the frequency range at which the light-emitting diode LD emits light.
  • the measured values and the extrapolation values are stored as a table in the memory 15.
  • the corrected actual power value Pi s t (k o rr) is supplied to the controller simultaneously with the power setpoint P so ii.
  • the controller 13 forms from this the control difference, which is also adjusted in this case of the power loss P v .
  • a rectifier is present at the output of the inverter (preferably in front of the capacitor parallel to the LED) (diode DG) or the LED (s) are connected in antiparallel.
  • the inductance L may be formed as a transformer or in the output circuit an additional transformer may be present, so that a potential separation can be achieved.
  • FIG. 2b thus shows an example of the operation of lighting means by means of DC voltage, which is generated here by rectification of an AC voltage of an inverter, but can also be generated by a DC voltage converter.
  • the third embodiment of the power-controlled operating circuit according to FIG. 3 has three special features.
  • the first special feature is that the control difference is corrected here as a control parameter.
  • the second special feature is that in this case - as in FIG. 2a - several individual values of the power loss at different frequencies in the pre-routine phase are measured, extrapolated and stored, but the power loss over a whole frequency range of interest is a function measured and stored in a memory 25.
  • the frequency range should in particular include all those frequencies which are controlled during the power regulation of the luminous means that here again is a gas discharge lamp LP.
  • the operating circuit designated here by the reference numeral 21 has as a third feature a substitution resistor RS, which is connected to the operating circuit 21 by means of a switch S3 during the pre-routine phase instead of the gas discharge lamp LP.
  • the function memory 25 is now supplied not only with the power loss P v as a voltage drop across the shunt resistor R 1, but also with a voltage drop across the resistor R 3 of the voltage divider R 2 / R 3 ,
  • the voltage drop across the resistor R3 is a measure of the voltage drop across the substitution resistor RS whose resistance value is known. Accordingly, it is also possible to calculate the power loss P RS , which is absorbed by the substitution resistor RS. It is understood that the power loss P v measured as the voltage drop across the shunt resistor R 1 must be reduced by the power loss P RS .
  • the function memory 25 now supplies the correction block 23 with the power loss P v as a function of the switching frequency f s and the power loss P RS picked up by the substitution resistor RS .
  • the block 23 forms a control value thereof Pdiff (corr) / • is adjusted by both the power loss P v of the operation circuit as well as the substitution caused by the resistance RS power loss P RS.
  • the switching of the switch S3 from the gas discharge lamp LP to the substitution resistor RS is performed by the processor 6.
  • the processor 6 thus ensures that the operating phase precedes a pre-routine phase in which the power loss P v is determined and stored.
  • the stored values can then be used in the subsequent operating phase to correct a control parameter, in order in this way ensure that the control is independent of the circuit-specific power loss and therefore the light output emitted by the light source always corresponds to the specified power setpoint.
  • the substitution resistance RS can also be easily formed by a bridge (that is, a 0 ohm resistor), which bridges the light source in the pre-phase (ie during scanning), ie short-circuiting.
  • the switch S3 can also be arranged externally or the switchover or bridging can also take place externally (ie the user connects a reference load or a substitution resistance in the preliminary phase instead of the luminous means).
  • the values of the useful power of the luminous means or of the substitution resistor RS caused by the light emission PRS can also be determined by external circuitry (ie external connection of the voltage divider R2 / R3 and the series resistor R14) and via an existing control line Operating circuit 1 (in particular the function memory 25) are supplied. This offers the advantage that the circuit parts required for the measurement in the pre-phase need not be present in the operating circuit 1 itself, but only have to be connected to the operating circuit 1 for the measurement in the pre-phase.
  • the measurement in the pre-phase can be done as a kind of calibration measurement, for example during the production of the operating circuit 1 or during the first start-up or even installation of the operating circuit 1 and the only for the implementation of the measurement in the preliminary Phase required circuit parts can in one Art
  • Operating circuits can be used.
  • the existing in the operating circuit 1 control line can be used.
  • the measurement can also be repeated at regular intervals, if necessary, an error message can be issued (eg by signal via bus or optical).
  • the losses can also be integrated over predefined periods.
  • the measurement in the measurement phase (ie, the scanning) can be initiated by a control command or the like by the user or a control center, for example over pure Control command.
  • the detection of a substitution resistance as a load (instead of the luminous means) can also be detected by a load detection, and thus the measurement in the preliminary phase can be initiated with the aid of load detection.
  • FIG. 4 shows an example of the application of a DC-DC converter (here a buck converter or buck converter).
  • a DC-DC converter here a buck converter or buck converter.
  • Inductance L stored, after the opening of the switch S2, this energy is discharged via a demagnetization of the inductance L in the freewheeling path formed by the light emitting diode LD and the freewheeling diode DF.
  • the inductance L is magnetized, this magnetizing current also flows through the light-emitting diode LD, while the freewheeling diode DF is blocked.
  • LED LD recorded power can be determined
  • Measuring phase can be connected to the operating circuit 1).
  • the power absorbed by the operating circuit 1 can, for example, by a Stromuberwachung in the Supply of the operating circuit 1 (for example via a current measurement by means of differential measurement, current sensor such as current transformer or potential offset stage or by a current measurement between ground and the feedback of the operating circuit 1). Knowing the supply voltage can be concluded on the recorded power.
  • the capacitor Cl acts in this example as a smoothing capacitor (parallel to the light emitting diode LD).
  • the light-emitting diode LD can, as in the exemplary embodiment of FIG. 3, be used to measure the losses in the measurement phase, for example an advance phase (ie the scanning) by a substitution resistor RS (this can also simply be a bridge (ie a 0 ohm) Resistor)) can be bypassed or replaced.
  • a substitution resistor RS this can also simply be a bridge (ie a 0 ohm) Resistor)
  • RS this can also simply be a bridge (ie a 0 ohm) Resistor)
  • the switching or bridging can also take place externally (i.e., the user connects a reference load or a substitution resistance in the measuring phase instead of the luminous means).
  • the losses (ie, the power loss) of the operating circuit 1 can be determined.
  • the losses (ie, the power loss) of the operating circuit 1 can be determined.
  • the power loss over a whole range of interest of the duty cycle can be measured as a function and a memory 25 are stored.

Landscapes

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

Abstract

L'invention concerne un circuit de ballast régulé en puissance (1, 21) pour un luminaire (LP, LD), et un procédé de fonctionnement. Pour la régulation de la puissance, la valeur réelle de puissance (Préelle) est mesurée et comparée à une valeur de puissance de consigne (Pthéorique) afin de déterminer une différence de régulation (Pdiff) qui est utilisée comme valeur de réglage (2). La valeur réelle de puissance (Préelle) mesurée est cependant affectée par la puissance dissipée spécifique du circuit (PV), qui varie en raison des tolérances de fabrication entre les circuits de ballast individuels. Pour garantir malgré tout que la puissance lumineuse fournie par le luminaire (LP, LD) corresponde toujours à la valeur de puissance de consigne (Pthéorique), au cours d'une phase de routine préalable pendant laquelle le luminaire n'absorbe pas encore de puissance utile pour l'émission lumineuse, la puissance dissipée (PV) réelle du circuit de ballast est déterminée et mémorisée. Dans la phase de fonctionnement qui suit, lorsque le luminaire a absorbé de la puissance utile pour l'émission lumineuse, au moins un des paramètres de régulation (valeur réelle de puissance, valeur de puissance de consigne et différence de régulation) est corrigé de manière à ce que la puissance dissipée (PV) n'ait pas d'influence sur le processus de régulation.
PCT/EP2010/055610 2009-04-28 2010-04-27 Circuit de ballast régulé en puissance pour un luminaire, et procédé de fonctionnement WO2010125053A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE112010001791T DE112010001791A5 (de) 2009-04-28 2010-04-27 Leistungsgeregelte Betriebsschaltung für ein Leuchtmittel sowie Verfahren zum Betreiben derselben
CN2010800190612A CN102428761A (zh) 2009-04-28 2010-04-27 用于照明器件的功率调节的工作电路及其运行方法
EP10716534.2A EP2425684B1 (fr) 2009-04-28 2010-04-27 Circuit de ballast régulé en puissance pour un luminaire, et procédé de fonctionnement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009019229.8 2009-04-28
DE102009019229A DE102009019229A1 (de) 2009-04-28 2009-04-28 Leistungsgeregelte Betriebsschaltung für ein Leuchtmittel sowie Verfahren zum Betreiben derselben

Publications (1)

Publication Number Publication Date
WO2010125053A1 true WO2010125053A1 (fr) 2010-11-04

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PCT/EP2010/055610 WO2010125053A1 (fr) 2009-04-28 2010-04-27 Circuit de ballast régulé en puissance pour un luminaire, et procédé de fonctionnement

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EP (1) EP2425684B1 (fr)
CN (1) CN102428761A (fr)
DE (2) DE102009019229A1 (fr)
WO (1) WO2010125053A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415496A2 (fr) * 1989-08-31 1991-03-06 Philips Patentverwaltung GmbH Circuit pour alimenter une lampe à décharge
EP0507399A2 (fr) * 1991-04-04 1992-10-07 Koninklijke Philips Electronics N.V. Dispositif de circuit
EP1148768A2 (fr) * 2000-04-14 2001-10-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Stabilisation dans le contrôle de lampes à décharge
JP2005149975A (ja) * 2003-11-18 2005-06-09 Matsushita Electric Ind Co Ltd 高圧放電灯の点灯装置およびそれを用いた電子機器
WO2006135836A1 (fr) * 2005-06-10 2006-12-21 Agere Systems Inc. Regulation du courant electrique par le biais d'une charge resistive
DE102006030655A1 (de) * 2006-04-21 2007-10-25 Tridonicatco Gmbh & Co. Kg Notlichtgerät zum Betreiben einer Lichtquelle, insbesondere einer LED

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415496A2 (fr) * 1989-08-31 1991-03-06 Philips Patentverwaltung GmbH Circuit pour alimenter une lampe à décharge
EP0507399A2 (fr) * 1991-04-04 1992-10-07 Koninklijke Philips Electronics N.V. Dispositif de circuit
EP1148768A2 (fr) * 2000-04-14 2001-10-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Stabilisation dans le contrôle de lampes à décharge
JP2005149975A (ja) * 2003-11-18 2005-06-09 Matsushita Electric Ind Co Ltd 高圧放電灯の点灯装置およびそれを用いた電子機器
WO2006135836A1 (fr) * 2005-06-10 2006-12-21 Agere Systems Inc. Regulation du courant electrique par le biais d'une charge resistive
DE102006030655A1 (de) * 2006-04-21 2007-10-25 Tridonicatco Gmbh & Co. Kg Notlichtgerät zum Betreiben einer Lichtquelle, insbesondere einer LED

Also Published As

Publication number Publication date
DE112010001791A5 (de) 2012-11-08
EP2425684B1 (fr) 2016-06-29
CN102428761A (zh) 2012-04-25
EP2425684A1 (fr) 2012-03-07
DE102009019229A1 (de) 2010-11-04

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