EP3289828A1 - Ensemble formant circuit et procédé de réduction de la modulation de lumière d'au moins une source de lumière commandée par une tension - Google Patents

Ensemble formant circuit et procédé de réduction de la modulation de lumière d'au moins une source de lumière commandée par une tension

Info

Publication number
EP3289828A1
EP3289828A1 EP16711272.1A EP16711272A EP3289828A1 EP 3289828 A1 EP3289828 A1 EP 3289828A1 EP 16711272 A EP16711272 A EP 16711272A EP 3289828 A1 EP3289828 A1 EP 3289828A1
Authority
EP
European Patent Office
Prior art keywords
light source
current
circuit arrangement
value
transistor
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP16711272.1A
Other languages
German (de)
English (en)
Inventor
Andreas Seider
Felix Franck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP3289828A1 publication Critical patent/EP3289828A1/fr
Ceased legal-status Critical Current

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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • 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
    • H05B45/395—Linear regulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the invention relates to a circuit arrangement and a method for reducing the light modulation of at least one operated at a voltage light source.
  • the invention relates to a circuit arrangement according to the preamble of the main claim.
  • converter or operating devices for light sources such as LEDs are increasingly designed so that they no longer completely smooth the changing pulsating DC voltage, which arises from the mains voltage after rectification, since this large storage such as electrolytic capacitors necessary which are expensive, bulky and unreliable in use. Rather, it is transferred to provide smaller energy ⁇ memory, which are cost effective or reliable executable.
  • more and more is being adopted to provide several smaller instead of a single concentrated converter, which are then also assigned to only one part of the light sources.
  • this results in the problem that the current is modulated by the Lichtquel ⁇ len with twice or multiple mains frequency, resulting in light emitting diodes as light sources to an unwanted light modulation.
  • the object is achieved with respect to the device according to the invention with a circuit arrangement for Verringe ⁇ tion of the light modulation of at least one operated at a voltage light source having a Lichtmodu ⁇ lation causing alternating component, wherein the circuit arrangement is serially switchable to the at least one light source and is set up, a current ⁇ value of the current through the at least one light source wherein it has a current control device which regulates the current through the at least one light source, wherein the instantaneous value of the measured current through the at least one light source is used as the actual value for the Stromreg gel worn and wherein an average value of the instantaneous value of the measured current through the at least a light source is used as the setpoint for the flow control device.
  • the circuit arrangement according to the invention is particularly advantageously active only in the case of correspondingly large and rapid current changes, while at constant current it has a very low impedance and thus hardly consumes energy.
  • Another advantage is the adaptability of the circuit arrangement according to the invention: Since it reacts only to changes in current, it can be used for any applications with a wide range of average and average currents in an unchanged circuit structure, in a particularly advantageous embodiment even with identical component values.
  • the design is relevant only for the measure of the current change, not for the absolute magnitude of the current. This is applied in the dimensioning of the circuit, which is to be regarded as a "large” or "fast ⁇ le” current change. This depends on the respective application. When using a mains voltage, this current change will therefore be in the ms range, whereas it is more in the ys range in an application, for example on an electronic transformer and thus will be much faster.
  • the circuit arrangement according to the invention is particularly advantageously active only in the case of correspondingly large and rapid current changes, while at constant
  • Circuit arrangement an averaging device (17). So she can easily and elegantly average advantageous even from the instantaneous value of the current determ ⁇ men, and the average value does not have to be entered in the circuit ⁇ arrangement from the outside.
  • the dung means Mittelwertbil- is a low-pass, and the average value of the ge ⁇ measured current through the at least one light source is formed by the low pass. This measure ensures a very simple, inexpensive and precise analogue averaging value.
  • the flow control device further preferably comprises:
  • the output of the operational amplifier is coupled to the control electrode of the transistor ⁇
  • the mean value of the instantaneous value of the measured current through the at least one light source is input to the negative input of the operational amplifier
  • the path between the working electrode and the reference electrode of the transistor is connected in series with the at least one light source.
  • the Heidelbergungsanord- voltage is arranged to measure the instantaneous value of the current through the at least one light source by means of a Strommesseinrich ⁇ tung, which is connected in series with the at least one light ⁇ source and to the distance between working electrode and reference electrode of the transistor.
  • the current measuring device is an ohmic resistance
  • the current can be measured by the light sources advantageously a particularly simple and cost-effective manner from the lining ⁇ processing arrangement itself.
  • the circuit arrangement is a two-terminal, which can be connected in series at any point in the circuit of the at least one light source.
  • This measure provides a particularly advantageous mush ⁇ tes application for the invention Druckungsan ⁇ properly secure.
  • the circuit arrangement has an integrated auxiliary voltage supply. With this measure, the circuit arrangement is even more universal, since it generates the internally required voltages themselves.
  • the circuit arrangement consists solely of the advantageous two-terminal, which is particularly versatile.
  • the auxiliary voltage supply comprises a half-wave rectifier.
  • This solution is particularly simple and inexpensive, since only one diode and one capacitor are necessary for this.
  • the at least one Lichtquel ⁇ le is an LED. LEDs are particularly efficient and an indispensable part of the lighting industry.
  • the at least one light source is an OLED.
  • Organic light-emitting diodes will play an increasingly important role in lighting in the future, and the circuit arrangement according to the invention is advantageously also suitable for this light source type.
  • the solution of the object with respect to the method is carried out according to the invention with a method for reducing the light modulation of at least one operated at a voltage light source, which voltage has an alternating component, wherein serially to the at least one light ⁇ source a current control circuit is provided, the actual value of the instantaneous value of the current is derived by the at least one light source, and their setpoint from an average of the instantaneous value of the current through the at least one light source is derived.
  • a current control circuit is provided, the actual value of the instantaneous value of the current is derived by the at least one light source, and their setpoint from an average of the instantaneous value of the current through the at least one light source is derived.
  • Fig.l is a schematic block diagram of the inventive ⁇ circuit arrangement for reducing the
  • FIG. 2 shows a first embodiment of the circuit arrangement for reducing the light modulation of at least one light source with a PNP
  • Transistor as variable impedance 3 shows a second embodiment of the circuit arrangement for reducing the light modulation of at least one light source with an NPN transistor as variable impedance
  • FIG. 4 shows the current through the at least one light source without the circuit for reducing the light modulation of at least one voltage operated light source
  • Fig. 5 shows the current through the at least one light source with the circuit arrangement for reducing the
  • Fig. 6 shows a third embodiment which is similar to
  • FIG. 3 Arrangement of FIG. 3 is, however, with interchangeable component arrangement in series with the light source
  • FIG. 8 shows the circuit from FIG. 7 with saturation prevention , even with transistors connected in parallel
  • FIG. 9 shows the circuit from FIG. 8 with half-wave rectifier
  • FIG. 10 shows the reciprocal circuit of FIG. 9 with pnp instead of npn transistor as a fifth embodiment.
  • Fig.l shows a schematic block diagram of the circuit arrangement OF INVENTION ⁇ to the invention 1 in a typical application to a chain of series-connected LEDs 5 that are operated at an alternating supply voltage UN.
  • the network AC voltage UN is input to a full-wave rectifier 3 and converted into a pulsating DC voltage.
  • This is applied to a chain 55 of serially connected LEDs 5.
  • a converter 7 is connected, which operates the LEDs with the appropriate current.
  • a part of the serially connected LEDs is bridged depending on the current voltage in order to be able to emit light in the network zero crossing.
  • the storage capacity of the converter is selected so that a predetermined light modulation in Netznull ⁇ passage is not exceeded, since the voltage at the storage capacitor drops so far that the current decreases in the LED chain 55.
  • the temporal change in brightness of the at least one light source 5, in this case the at least one LED 5, is referred to as light modulation.
  • the change in the light brightness emitted by the at least one LED 5 is due to the change in the current through the at least one LED 5.
  • Straight LEDs have, in contrast to classic incandescent lamps a very low inertia in the implementation of the input electric power in light and are therefore very critical regarding light modulation (see also
  • the circuit arrangement 1 is connected in series with the LED chain 55 from the LEDs 5 and to the operating device 7.
  • the circuit arrangement 1 has two connections and is thus a two-pole.
  • the circuit arrangement 1 has a current control device 11 and a current measuring device 13, which are connected in series.
  • the series circuit of the current control device 11 and the current measuring device 13 is coupled to the two terminals of the circuit arrangement 1.
  • the first terminal of the circuit arrangement 1 is coupled to one end of the series circuit, the second terminal of the circuit arrangement 1 is coupled to the other end of the series circuit.
  • a current ILED flows.
  • this current also flows through the current regulating device 11 and the current measuring device 13.
  • the current measuring device 13 measures the instantaneous value of the current ILED and transmits it as the actual value I i to the current regulating circuit 11 and to an averaging device 17.
  • the averaging device 17 forms a moving average from the actual values of I i and forwards them to the current control device 11 as the setpoint value I s.
  • the mean value over a certain period of time, which runs along with the current time is regarded as the moving average (see also
  • the current control device 11 thus receives as the actual value, the instantaneous value of the current ILED and as the setpoint the moving average of the instantaneous value of the current ILED. It is thereby achieved that the circuit arrangement according to the invention intervenes in the case of strong current fluctuations and smoothes the current, while they are weak or slow
  • the circuit arrangement 1 comprises wei ⁇ terhin nor an auxiliary power supply 15 which their Energy over the first and the second connection of the
  • Circuit 1 relates and provides an auxiliary voltage U B for the current control circuit 11 is available.
  • Fig. 2 shows a first embodiment of the circuit arrangement for reducing the light modulation of at least one light source with a PNP transistor Ql as a variable impedance.
  • the PNP transistor is part of the current regulating device 11 and controls the current through the LEDs 5 with its collector-emitter path. It is driven by the output of an operational amplifier U1 via a base resistor R17.
  • the current ILED through the LEDs is converted by a shunt R2 into a measuring voltage which is input as the actual value I i into the positive input of the operational amplifier U1.
  • the shunt R2 is thus the current ⁇ measuring device 13.
  • This voltage is passed through a low-pass from the resistor R3 and the capacitor C2, and the voltage across C2 is input as a setpoint Is in the negative input of the operational amplifier Ul.
  • the low-pass ⁇ from the resistor R3 and the capacitor C2 is thus the averaging means 17, which generates as a low pass filter moving average of the instantaneous value of the current ILED through the LED chain 55th
  • the shunt R2 is connected to the collector of the PNP transistor Ql.
  • the other terminal of the shunt R2 is connected to the second terminal of the circuit arrangement 1.
  • the emitter of transistor Ql is connected to the first terminal of the scarf ⁇ processing arrangement.
  • the averaging device 17 consists of the low-pass filter with the components R3 and C2, wherein a connection of the resistor R3 to the first terminal of the shunt R2 and is connected to the collector of the transistor Ql, and the other terminal of the resistor R3 is connected to the capacitor C2 and the negative input of the operational amplifier Ul.
  • the other terminal of the capacitor C2 is connected to the second terminal of the shunt R2 and to the second terminal of the circuit arrangement 1.
  • the circuit arrangement 1 also has an auxiliary voltage supply 15.
  • the auxiliary voltage supply 15 has a decoupling diode D20 and a serially connected charging resistor R20. The first connection of this
  • the auxiliary voltage supply 15 thus comprises a half-wave rectifier, represented by the capacitor C20 and the decoupling diode D20.
  • the voltage at Kon ⁇ capacitor C20 is limited by the parallel Zener diode D21.
  • the voltage applied to the capacitor C20 voltage is used as a power supply for the operational amplifier Ul. How it works:
  • the current control device 11 controls, like all control devices, to the desired value Is, which is the average value of the LED. Electricity is ILED. So long as this LED current does not change greatly, the output of the operational amplifier Ul is at a potential near the reference potential of the Operationsver ⁇ amplifier Ul on. This potential is input to the PNP transistor through resistor R17 and leads to it
  • the instantaneous value I i of the LED current ILED is greater than the average value I s of the LED current ILED.
  • the actual value is greater than the target value ⁇ . Due to the unusual assignment of setpoint and actual value to plus and minus input of the operational amplifier Ul, the potential at the output of the operational amplifier Ul increases, instead of reducing as usual, and the transistor is successively high-impedance. Thus, the impedance of the collector-emitter path of the transistor Ql increases, and the current ILED through the LEDs becomes smaller.
  • the circuit arrangement correspondingly reverses and controls its transistor successively at a lower impedance.
  • the circuit arrangement 1 counteracts the current fluctuations of the LED current ILED and equalizes them.
  • Fig. 3 shows a second embodiment of the circuit arrangement for reducing the light modulation of at least one light source with an NPN transistor as a variable impedance.
  • the second embodiment is similar to the first embodiment, in principle “horizontal”. gelt ", therefore, only the differences from the first embodiment will be described.
  • the second embodiment uses, instead of the PNP transistor, an NPN type in the current regulating circuit 11. As a result, the current measuring device 13, which is in
  • the instantaneous value of the current I LED is again measured by the LEDs 5.
  • This point is in turn connected to a low-pass filter from the components C2 and R4.
  • This low-pass filter in turn represents the averaging device 17.
  • a first terminal of the capacitor C2 is connected to the first terminal of the circuit arrangement 1.
  • the second terminal of the capacitor C2 is connected to the first terminal of the Widerstan ⁇ of R4 and the negative input of the operational amplifier Ul.
  • the second terminal of the resistor R4 is connected to the collector of the transistor Ql and to the positive input of the operational amplifier Ul.
  • the auxiliary voltage supply 15 is dual in comparison with the first embodiment.
  • the capacitor C5 and the cathode of the parallel-connected Zener diode D3 are connected to the first terminal of the circuit arrangement 1 and to the positive terminal of the power supply of the operational amplifier Ul.
  • the other terminal of the parallel circuit is connected to the first terminal of the resistor R5 and the negative terminal of the voltage ⁇ supply of the operational amplifier Ul.
  • the second terminal of the resistor R5 is connected to the anode of the diode D2, the cathode of the diode D2 is connected to the second terminal of the circuit arrangement 1 and the emitter of the transistor Ql.
  • the auxiliary power supply 15 thus comprises again a peak value rectifier, represented by C5 and D2, but which here works “suction”:
  • the diode D2 sucks the potential at the connection ⁇ point to capacitor C5 whose second point is fixedly connected to the first terminal of the circuit arrangement 1
  • the circuit arrangement 1 of the second embodiment operates analogously to the circuit arrangement 1 of the first embodiment, in a dual manner
  • the operational amplifier acts in a reverse manner and controls the NPN transistor of this embodiment again accordingly, so that this at low current changes of the current ILED remains low-ohmic through the LEDs 5, while it successively becomes more highly ohmic in the event of faster and stronger changes of the current ILED by the LEDs 5.
  • the constant input assignment of the operational amplifier in both embodiments is due to the fact that not only its input signals but ge ⁇ nauso also the output signals in the second embodiment to those in the first negative exactly. Further embodiments not illustrated arise through the use of so-called open-collector amplifiers, or by exchanging the order of current Regels circuit and current measuring device.
  • the second embodiment illustrated in FIG. 3 and described above in detail is preferably suitable for using an open-collector amplifier instead of the operational amplifier and the NPN transistor, which thus represents the entire current-regulating circuit.
  • an output current can only flow into its output, and that at the same time the output current flows out at its negative supply connection.
  • Said output current can be, for example, the current to be regulated ILED.
  • the respective current measuring means may also be connected to the emitter of the transistor acting as a variable impedance. Regardless of the polarity of the transistor itself then applies, however, that the instantaneous value of the LED current I LED is to be led to the inverting input, ie the negative input of the operational amplifier, and that the mean ⁇ value of the same current to the non-inverting input , So is to lead to the positive input of the operational amplifier.
  • Fig. 4 and 5 show the effects of the circuit arrangement on the current through the LEDs 5 and the LED chain.
  • Fig. 4 shows the current through the LEDs 5 without the circuit arrangement according to the invention. It is interpreting ⁇ Lich to see a high current modulation of over 50%, which shows up in the same way in a corresponding light modulation due to the characteristic of the LED. The current varies from a minimum value of approx. 33mA to a maximum value of approx. 77mA within a period of approx. 5ms.
  • Fig. 5 shows the current through the LEDs 5 with the circuit arrangement according to the invention.
  • the circuit arrangement according to the invention acts as described above, the current flow through the LEDs 5 in FIG. 5 is very uniform at about 45 mA and no longer shows any significant modulation.
  • the Lichtmo ⁇ modulation in converters with a small energy storage according to the invention can be virtually completely suppressed.
  • the result is a uniformly emitted light, which is very well absorbed by the human organism and does not lead to any impairment of human physiology.
  • Fig. 6 shows a third embodiment which differs from the second embodiment of the circuit arrangement characterized in that to reduce the light modulation of at least one light source, the order of the construction ⁇ elements and functional blocks is switched in series with the light source.
  • the third embodiment from FIG. 6 is not suitable for use with an open-collector amplifier instead of the operational amplifier and the NPN transistor.
  • open-collector amplifiers necessarily require the order shown in Fig. 2 or 3 between current measuring device and current control circuit. This compulsion is eliminated as soon as current control circuits as here fully developed operational amplifier with a basic resistor of their outputs controlled discrete transistors as effective variable impedance in use. Then, in contrast to the figures 2 or 3, the respective current measuring devices may also be connected to the emitter of the transistor acting as a variable impedance Ql.
  • the current measuring device 13 which is connected in series with the collector-emitter path of the NPN transistor Ql and connected to the emitter of this transistor, is now connected at its other end to the second terminal of the circuit arrangement 1, so it is seen in the classical voltage direction. below the variable impedance associated therewith.
  • the collector of the NPN transistor Q1 is connected to the first terminal of the circuit arrangement 1.
  • shunt R2 which again represents the current measuring device 13, and the emitter of the transistor Ql
  • the instantaneous value of the current I LED is again measured by the LEDs 5.
  • This point is in turn connected to a low pass filter of components C2 and R4. Again, this low-pass filter represents the averaging means 17th
  • a first terminal of gate capacitors C2 is connected to the second terminal of the circuit arrangement ⁇ . 1
  • the second terminal of Kondensa ⁇ tors C2 is connected to the first terminal of resistor R4 and the positive input of the operational amplifier Ul connected.
  • the second terminal of the resistor R4 is connected to the emitter of the transistor Ql and to the negative input of the operational amplifier Ul.
  • the auxiliary voltage supply 15 is here not dual, but as in the first embodiment of Fig. 2 constructed.
  • circuit arrangement 1 of this third embodiment operates analogously to the circuit arrangement 1 of the first embodiment. Because of the also "lying down"
  • Shunts R2 are the voltage changes across the resistor R2 and thus the actual values Ii poled same as in the first embodiment of FIG. 2. Because the operational amplifier is to work in the same way, but must drive an NPN transistor accordingly, its inputs here are between ⁇ exchange setpoint and actual value. Then Ql also acts here so that it remains low impedance at low current changes of the current I LED through the LEDs 5, while it is successively higher impedance at times faster and stronger changes of the current I LED by the LEDs 5 and thus counteracts the current change.
  • variable impedance Ql and current measuring device R2 The arrangement of variable impedance Ql and current measuring device R2 is taken over unchanged from the predecessor figure.
  • Ql is an NPN transistor, which is considered to be the easiest way to build an amplifier. Its Jacobkoppeleingang is its emitter, the signal for a voltage whose Mitkoppeleingang its base. This closes the circle of polarities with the known properties of each NPN transistor.
  • a positive feed-in signal is a current that flows into the base.
  • the capacitor C2 is also charged to a voltage whose value corresponds to the mean value of the measured current flowing through the light source.
  • it is connected substantially parallel to the current measuring resistor R2, and the mesh is supplemented by the low-pass-forming resistor R4.
  • this low-pass-forming mass at the node between R4 and R2 not directly, but over the base-emitter path of
  • Fig. 8a shows a development of the third embodiment ⁇ example with linearization of the gain of the NPN transistor Ql through a resistor R18, which is switched directly pa ⁇ rallel to the base-emitter path of this transistor ge ⁇ .
  • This linearization shows clear advantages at low input voltages, in particular, it avoids the saturation of the transistor and then the following dips in the current through the light source, which undesirably increase the current ripple.
  • FIG. 8b shows how several small NPN transistors can be connected in parallel. All collector and base connections are interconnected, but not the emitter connections: Each individual transistor gets its own current sense resistor R2 ⁇ and its own linearization resistance R18 x .
  • the peak value rectifier becomes a half-wave rectifier.
  • the drop across the pull-up resistor R17 voltage compensates for this, because in C2, a significantly small ⁇ rer value for the average light source current is now saved and no longer a peak value of the total voltage.
  • the overall voltage drop across the circuitry may become less than the voltage currently stored in C2. Then, the so-called collector gene coupling begins, portions of the actual ⁇ provided for the base current from C2 flow instead via the collector of the same transistor and displace not only the actually provided there
  • FIG. 10 shows a fifth embodiment of the circuit arrangement, which essentially corresponds to FIG. 9 with a PNP transistor Q1, which is used as a variable impedance.
  • the auxiliary voltage supply 15 is now again “suction" constructed as in Fig. 3, as is the
  • I circuit arrangement for reducing the light modulation of at least one light source

Landscapes

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

Abstract

L'invention concerne un ensemble formant circuit et un procédé pour réduire la modulation de lumière d'au moins une source de lumière commandée par une tension qui comporte une partie alternative provoquant la modulation de lumière. L'ensemble formant circuit peut être monté en série à la ou aux sources de lumière, est conçu pour mesurer une valeur instantanée du courant traversant la ou les sources de lumière et comprend un dispositif de régulation de courant qui régule le courant traversant la ou les sources de lumière. La valeur instantanée du courant mesuré traversant la ou les sources de lumière peut servir de valeur réelle pour le dispositif de régulation de courant et une valeur moyenne de la valeur instantanée du courant mesuré traversant la ou les sources de lumière peut servir de valeur de consigne pour le dispositif de régulation de courant.
EP16711272.1A 2015-04-30 2016-03-22 Ensemble formant circuit et procédé de réduction de la modulation de lumière d'au moins une source de lumière commandée par une tension Ceased EP3289828A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015208078.1A DE102015208078A1 (de) 2015-04-30 2015-04-30 Schaltungsanordnung und Verfahren zur Verringerung der Lichtmodulation von mindestens einer an einer Spannung betriebenen Lichtquelle
PCT/EP2016/056189 WO2016173776A1 (fr) 2015-04-30 2016-03-22 Ensemble formant circuit et procédé de réduction de la modulation de lumière d'au moins une source de lumière commandée par une tension

Publications (1)

Publication Number Publication Date
EP3289828A1 true EP3289828A1 (fr) 2018-03-07

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EP16711272.1A Ceased EP3289828A1 (fr) 2015-04-30 2016-03-22 Ensemble formant circuit et procédé de réduction de la modulation de lumière d'au moins une source de lumière commandée par une tension

Country Status (3)

Country Link
EP (1) EP3289828A1 (fr)
DE (1) DE102015208078A1 (fr)
WO (1) WO2016173776A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018201364A1 (de) 2018-01-30 2019-08-01 Osram Gmbh Schaltungsanordnung zum betreiben mindestens eines ersten und eines zweiten led-strangs an einer wechsel- oder einer gleichspannungsquelle
DE102018201366A1 (de) 2018-01-30 2019-08-01 Osram Gmbh Schaltungsanordnung zum betreiben mindestens eines strangs von lichtquellen an einer spannung

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Publication number Priority date Publication date Assignee Title
DE10225670A1 (de) * 2002-06-10 2003-12-24 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Ansteuerschaltung für mindestens einen LED-Strang
US8217587B2 (en) * 2006-01-31 2012-07-10 Koninklijke Philips Electronics N.V. LED driver circuit
EP2036405A1 (fr) * 2006-06-22 2009-03-18 Koninklijke Philips Electronics N.V. Circuit de commande pour commander une charge avec un courant pulsé
DE102008014694A1 (de) * 2008-03-18 2009-09-24 Tridonicatco Gmbh & Co. Kg Leistungsregelung von Gasentladungslampen in Vollbrückenschaltungen
CN103066817A (zh) * 2012-12-24 2013-04-24 成都芯源系统有限公司 一种纹波抑制电路及其供电系统和纹波抑制方法
CN103200734B (zh) * 2013-02-20 2015-09-02 英飞特电子（杭州）股份有限公司 一种降低电流源输出电流纹波的方法及电路
CN103269550B (zh) * 2013-06-04 2015-02-04 上海晶丰明源半导体有限公司 一种led电流纹波消除驱动电路
AT14104U1 (de) * 2013-11-07 2015-04-15 Tridonic Gmbh & Co Kg Betriebsschaltung für eine Leuchtdiode und Verfahren zum Steuern einer Betriebsschaltung
CN103840647B (zh) * 2014-03-18 2016-02-17 矽力杰半导体技术(杭州)有限公司 电流滤波电路及电源变换器

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WO2016173776A1 (fr) 2016-11-03
DE102015208078A1 (de) 2016-11-03

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