WO2011045372A1 - Gradation d'intensité de del par coupure de phase - Google Patents

Gradation d'intensité de del par coupure de phase Download PDF

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Publication number
WO2011045372A1
WO2011045372A1 PCT/EP2010/065412 EP2010065412W WO2011045372A1 WO 2011045372 A1 WO2011045372 A1 WO 2011045372A1 EP 2010065412 W EP2010065412 W EP 2010065412W WO 2011045372 A1 WO2011045372 A1 WO 2011045372A1
Authority
WO
WIPO (PCT)
Prior art keywords
bleeding
circuit
supply voltage
led module
signal
Prior art date
Application number
PCT/EP2010/065412
Other languages
English (en)
Inventor
Ian Wilson
James Frankland
Original Assignee
Tridonic Uk Limited
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 Uk Limited filed Critical Tridonic Uk Limited
Priority to CN201080045801.XA priority Critical patent/CN102598857B/zh
Priority to EP10766043A priority patent/EP2489242A1/fr
Publication of WO2011045372A1 publication Critical patent/WO2011045372A1/fr

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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
    • H05B45/357—Driver circuits specially adapted for retrofit LED light sources
    • H05B45/3574—Emulating the electrical or functional characteristics of incandescent lamps
    • H05B45/3575—Emulating the electrical or functional characteristics of incandescent lamps by means of dummy loads or bleeder circuits, e.g. for dimmers
    • 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]
    • 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]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology
    • 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]
    • H05B45/385—Switched mode power supply [SMPS] using flyback topology
    • 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 present invention generally relates to the field of dimming LED lighting means using phase cut dimming.
  • LED light emitting diodes
  • phase dimmers There are several types of dimmers generally available. Those employing triac or thyristor devices operate in a very similar fashion. Both act as high-speed switches and in a dimmer are used to control the amount of electrical energy passing to a lamp. They do this by 'chopping' the sinusoidal mains voltage waveform. A trigger or firing pulse dictates at what point the device starts to conduct. The later the device is fired the later it starts to conduct and hence less power is transmitted to the load.
  • LEDs can be controlled by means of a digital bus, e.g. by D X.
  • the main problem is the compatibility of a common triac dimmer in use with a LED driver circuit and to provide a dimming signal according to the control of the phase dimmer. So it is the main focus of the invention to provide a method and a circuitry to solve this problem.
  • WO 2009/121956 Al teaches a constant current source which is selectively activated when the amplitude of a AC voltage supply falls below a given threshold, such activating a dummy load during these periods. This approach is called “bleeding" and a circuit which activates a dummy load in order to draw an additional current from a constant current source, when the input AC voltage level falls below a given threshold voltage, is called a "bleeding circuit”.
  • the present invention proposes an improved solution for dimming LEDs based on a phase cut manipulation of an AC supply voltage of a operating means for one or more LEDs, OLEDs or any other lighting means which are comparable as to their electrical characteristics.
  • a first aspect of the invention relates to a dimmable LED module
  • the module being designed for being dimmed using a dimmer controlling a phase cut of an AC supply voltage supplied to the LED module, the module comprising:
  • a bleeding circuit for selectively acting to draw a bleeding current in periods when the supply voltage amplitude is below a threshold value
  • a control circuit being supplied with a signal indicating the activity of the bleeding circuit, the control circuit determining, based on the bleeding activity indication signal, a value representing the phase cut present in the AC supply voltage and issuing a control signal as a function of the phase cut value
  • At least one driver circuit being supplied with said control signal and adjusting the power supplied associated LED lighting means.
  • Another aspect of the invention relates to a dimmable LED module
  • the module being designed for being dimmed using a dimmer controlling a phase cut of an AC supply voltage supplied to the LED module, the module comprising: - a bleeding circuit for selectively acting to draw a bleeding current depending the phase cut present in the AC supply voltage, a control circuit being supplied with a signal indicating the activity of the bleeding circuit, the control circuit determining, based on the bleeding activity indication signal, a value representing the phase cut present in the AC supply voltage and issuing a control signal as a function of the phase cut value, and
  • At least one driver circuit being supplied with said control signal and adjusting the power supplied associated LED lighting means.
  • the bleeding activity indication signal may indicate directly or indirectly one of the bleeding current or a voltage across resistive means of the bleeding circuit, such as e.g. a resistive means measuring the combined effect of the supply voltage and the activity of the bleeding circuit.
  • the bleeding circuit may be a circuit separate to the control circuit or a circuit which is integrated part of the control circuit.
  • the bleeding activity indication signal may be a pulse signal.
  • the control circuit may determine the pulse width of the bleeding activity indication signal.
  • the bleeding current may be constant, varying or pulsed, especially actively PWM controlled.
  • the bleeding activity indication signal may be produced for every cycle of the mains voltage or periodically, i.e. not for all mains voltage cycles.
  • the bleeding circuit may comprise a current source and is passively activated, or the bleeding circuit comprises a timed logic actively controlling a switch of the bleeding circuit .
  • the control circuit may be designed to obtain, based on the bleeding circuit indication signal, the timing of the zero-crossings of the AC supply voltage as well as the timing of any phase cut of the AC supply voltage.
  • a further aspect relates to a LED module, wherein LED module comprises a bleeding circuit and a driver circuit controlling the power of the LED lighting means via one or more of:
  • the PWM pulses having a frequency in the order of twice the frequency of the AC supply voltage, preferably with a frequency between 90 and 140 Hz, the PWM pulses being preferably synchronous with the bleeding activity indication signal,
  • the PWM pulses having a frequency of more than 200Hz, preferably more than 500Hz, and/or
  • the supply potential of the LED lighting means may be isolated from the supply voltage by isolating means, such as e.g. an opto-coupler, wherein the control circuit may be connected to the potential of the primary side or the secondary side of the isolating means.
  • isolating means such as e.g. an opto-coupler
  • the invention also relates to a retrofit LED lamp, comprising a LED module as described above.
  • a further aspect of the invention relates to a method for operating a dimmable LED module, the module being dimmed using a dimmer controlling the phase of an AC supply voltage supplied to the LED module, such as e.g. a dimmer having a triac, wherein:
  • a bleeding circuit of the LED module selectively acting draws a bleeding current in periods when the supply voltage amplitude is below a threshold value
  • a control circuit is supplied with a signal indicating the activity of the bleeding circuit and issues a control signal depending on the bleeding activity indication signal, and at least one driver circuit is supplied with said control signal and adjusts the power supplied associated LED lighting means.
  • the bleeding activity indication signal indicates directly or indirectly one of the bleeding current or a voltage across resistive means of the bleeding circuit, such as e.g. a resistive means measuring the combined effect of the supply voltage and the activity of the bleeding circuit.
  • the bleeding activity indication signal is a pulse signal and the control circuit determines the pulse width of the bleeding activity indication signal.
  • control circuit may determine the timing of the zero crossings of the AC supply voltage.
  • the control circuit may synchronize the measurement of any phase cut angle present in the supply voltage based on the timing of the zero crossing.
  • the bleeding current may be constant, varying or pulsed, especially by actively PWM controlling a switch of the bleeding circuit.
  • the bleeding activity indication signal may be produced for every cycle of the mains voltage or periodically, i.e. not for all mains voltage cycles.
  • the bleeding circuit may be activated passively, or the bleeding circuit controlling actively, e.g. via a switch.
  • FIG. 1 shows a first embodiment of a dimmable ballast for LED lighting means
  • Figure 2 shows a first embodiment of a dimmable ballast for LED lighting means
  • Figure 3 shows in detail a first embodiment
  • FIG. 4 shows in detail a second embodiment of the invention
  • Figure 5 illustrates the output signal of a leading edge dimmer and the corresponding bleeding current detection signal at R S unt f and
  • Figure 6 shows in detail a third embodiment of the invention .
  • a secondary side control (regulation) for the LED power is proposed.
  • primary side' and 'secondary side' relates to the primary side and secondary side, respectively, of an isolating means separating the potential of the LED lighting means from the supply voltage, as will be explained later on in the detail.
  • a AC supply voltage such as for example a AC mains voltage of a frequency of 50Hz or 60Hz and a RMS voltage of 120V or 230V, is supplied to an input filter 2 of the ballast.
  • the AC supply voltage may be phase-cut, e.g. by a dimmer operated manually by a user, the dimmer comprising a Triac or Thyristor for the phase-cut.
  • the time duration of the phase cut represents a dimming command.
  • the output signal i.e. the filtered AC supply voltage of the input filter 2 is then supplied both to a first rectifier 3 and a second rectifier 4.
  • the first rectifier 3 is provided in order to transmit the power to the LED lighting means 5.
  • the second rectifier 4 is provided in order to feed a bleeding circuit 6 and a dimming control circuit 7. Note that it is also possible to provide only a single rectifier both for the power transmission to the LED lighting means 5 and for the bleeding circuit 6.
  • the bleeding circuit has one or more, preferably all of the following functions : i. To act as a load at the AC supply (e.g.) mains input and prevent supply voltage leakage currents (as across gas discharge lamps etc.) from raising the input voltage to the driver circuit and causing retrigger and light flicker when the driver is switched off. ii. To enable the input voltage to follow more accurately the phase cut of the supply voltage via the triac. Since the average rectified voltage or bus voltage is often used to control the system this is important to avoid errors. Without the activity of the bleeding circuit the voltage can drift up especially with leakage currents across dimmers or switches. iii. To support the triac holding current at point of switching. iv. To damp ringing behaviour inside the dimmer and between the dimmer and the input RFI filter of the converter . v. To support the detection dimming information from leading and trailing edge dimmers.
  • the output of the first rectifier 3, i.e. the filtered and rectified AC supply voltage, can be optionally supplied to - a valley-fill circuitry 8 (e.g. an active valley fill circuitry, a passive valley fill circuitry or a combined active-passive valley fill),
  • a valley-fill circuitry 8 e.g. an active valley fill circuitry, a passive valley fill circuitry or a combined active-passive valley fill
  • an actively switched PFC circuit 9 (wherein a switch of the PFC circuit is controlled by a control circuit receiving at least one input signal), or
  • a filter circuit 10 comprising e.g. an electrolyte capacitor .
  • the thus processed rectified and filtered supply voltage is then supplied to the LED driver 11 having a DC/DC converter such as for example a flyback converter 12, especially a quasi-resonant flyback converter.
  • a DC/DC converter such as for example a flyback converter 12, especially a quasi-resonant flyback converter.
  • a flyback converter 12 especially a quasi-resonant flyback converter.
  • the isolation can also be outside the DC/DC converter.
  • the dimmable LED module may also be nonisolated, as it may comprise a non-isolated buck-converter as DC/DC converter.
  • the LED driver 11 supplies the LED lighting means 5 with a regulated (feedback-controlled) power.
  • the LED lighting means 5 can present a plurality of LEDs (or OLEDs, or other lighting means with comparable electrical characteristics) can be connected in series and/or in parallel.
  • a feedback signal 13 indicating e.g. the current trough the LED lighting means is fed back to the LED driver 11.
  • the LED driver in the shown example, being a flyback converter 12, has a primary side switch 14. By adapting the clocking of the switch 14 the power supplied to the LED lighting means can be controlled such that the measured value of the feedback signal 13 is controlled to be close if not identical to a nominal value.
  • the modification of the electrical power supplied to the LED lighting means could be done by change of amplitude of the LED current or just by burst operation, according to phase dimmer signal derived by the bleeding circuitry.
  • the Dc/DC converter has at least one control input for modifying the electrical power supplied to the LED lighting means 5.
  • the potential of the LED lighting means 5 may be galvanically isolated from the AC supply voltage 1. In the shown example, this isolation is actually implemented by means of the transformer 15 of the AC/DC converter 12.
  • the current control e.g. via the switch 14 of the DC/DC converter 12 is performed as controlled by an output signal 16 of the dimming control circuit 7.
  • the dimming control circuit 7 thus supplies, via the signal 16, a nominal value for the LED lighting means power.
  • a control circuit 17 actually drives e.g. the switch 14 of the LED driver 11 depending on the measured feedback signal 13 and the controlled (nominal value) signal 16 of the dimming control circuit 7.
  • the dimming control circuit 7 is isolated e.g. by an optocoppler 18 from the potential of the LED lighting means 5, as in the present example the dimming control circuit 7 is not isolated from the AC supply voltage 1. As it may not be necessary to isolate the dimming control circuit 7 from the potential of the LED lighting means 5, the dimming control circuit 7 could also be directly linked to the secondary side, e.g. the the LED driver 11.
  • the embodiment of fig. 1 is called a secondary side regulation as the power (current) control of the LED lighting means 5 is performed on the secondary side of the isolating means 15.
  • the alternative embodiment of fig.2 implements the concept of a primary side regulation.
  • the AC supply voltage is supplied to an input filter 2 and then to a burst rectifier 3 in a second rectifier 4.
  • the output of the first rectifier 3 is again, in this embodiment, is directly supplied to the LED driver 11.
  • the LED driver 11 has isolating means 15 such as for example the illustrated transformer.
  • the output of the second rectifier 4 is again both forwarded to a bleeding circuit 6 and a dimming control circuit/interface 7.
  • the term "interface” refers to the fact that this circuit can receive external dimming signals from a bus, wirelessly (e.g. IR) , etc., which external input is schematically designated to the reference numeral 19. This obviously also applies to the embodiment of fig. 1.
  • the dimming circuit/interface 7 controls the LED driver 11 e.g. by driving the switch 14 on the primary side of the converter 11.
  • a first example is the modulation of the DC level of the current through the LED lighting means 5.
  • a second option is a high freguency PWM control, wherein "high freguency” is to be understood that the resulting current pulses through the LED lighting means 5 have a frequency which is higher than the frequency of the rectified AC input voltage. In the case of an AC mains voltage supply, thus the high frequency PWM pulses will have a frequency of more than 120 Hz.
  • a third option is PWM control of the power dissipated by the LED lighting means 5, wherein "low frequency” is to be understood that the low frequency PWM pulses of the current through the LED 5 a frequency in the order of the rectified supply voltage, e.g. 100 Hz or 120 Hz.
  • Fig. 3 shows in detail a preferred embodiment for the bleeding circuit 6 supplied by the filtered AC supply voltage, which is rectified (diode bridge 3) before being supplied to the bleeding circuit 6.
  • the bleeding circuit 6 is provided with a constant current source comprising a transistor T2, which is controlled by the base-emitter voltage of T2.
  • the amplitude of the bleed current can be controlled, e.g. to a range of between 10-50mA, preferably 20-30mA.
  • the time logic unit can be e.g. a microcontroller, an ASIC, or an hybrid thereof.
  • the time logic unit 21 senses the resulting bleed current at an input pin of the time logic unit 21.
  • the bleed current is activated by the timed logic unit for periods in which the input voltage (supply voltage) is low and e.g. has an amplitude of less than 30Vpk.
  • the timed logic unit once synchronized with the AC supply voltage, enables the bleeding circuit in these low voltage periods (around the zero crossings) and then detects the activity of the enabled bleeding circuit.
  • the current pulses will be detected at R S hunt near the zero crossings of the AC supply voltage, and furthermore different bleeding current pulses will be sensed by R S hunt at the input of the time logic unit when the triac in the manually operated dimmer switches on.
  • the supply voltage amplitude will be low and the only current drawn through R S hunt is the guiescence current necessary to supply (hold) the dimmer electronics, i.e. the electronics in the manually operated dimmer outside the LED lighting ballast .
  • the bleed activity is sensed by measuring the bleed current, as especially timings and/or widths of the bleed current pulses.
  • the width serves as a discrimination criterion for pulses having differing causes.
  • the activity of the bleeding circuit alternatively or even additionally can also be sensed on the mains voltage line. Such an example will be described as one variant of Fig. 6 later on.
  • Fig. 4 shows a further possible documentation of a bleeding circuit 6' according to the present invention.
  • the timed logic unit 21' activates the bleed current outputting a PWM signal, which is filtered through a RC filter circuitry (CI, R2) to control e.g. a MOSFET switch Ml to the conducting state.
  • a RC filter circuitry CI, R2
  • resulting bleed current is measured using a measurement shunt R S hunt and is supplied to an input pin of the timed logic unit 21' .
  • Fig. 5 shows an illustration of the trailing edge dimmer output signal (upper view) and the corresponding pulse current detection at the shunt R S hunt-
  • a trailing or leading edged detection algorithm can be divided in the LED ballast deriving the timing of the phase cut from the current pulse information by looking at the pulse width or the timing of the pulses to compute the timing of the zero crosses of the AC supply voltage as well as the operating frequency of the AC supply voltage.
  • the narrower current pulses indicate the position of the phase cut. This detection of the broad current pulses (bleed current) and the narrow pulses (art of the phase cut by the triac or thyristor in the dimmer) , respectively, can be performed by the timed logic unit 21, 21' .
  • phase cut timing of the dimmer can be detected.
  • the detected phase cut can be used as a dim control information and can be "translated" in different manners (see above: modulation of DC current through the LED lighting means, high frequency PWM or low frequency PWM) .
  • the operation of the DC/DC converter 11 is stopped during the detected phase cut.
  • the bleed current can be activated using an active or adaptive method.
  • the bleed current is activated continuously for one or several cycles of the AC supply voltage to enable the timing to be detected either via the voltage at the measurement shunt R S hunt (when the dimmer switch is off) or via the supply input voltage signal which can be detected at the output of the bridge rectifier 3.
  • the repetition rate for the bleed current activation should be sufficient to quickly detect when the dimmer is altered but low enough to keep dissipation inside the bleeding circuit 6, 6' at an acceptable level.
  • a PWM signal with high frequency can be applied to the bleed switch (fig. 4) in order to limit the power dissipation. This can be tracked across the voltage time period to detect the phase cut position.
  • the bleeding circuit can be active for one cycle of the AC supply voltage and the average voltage can be used to predict the dimmer information. This can e.g. be performed every 10 cycles to limit the power dissipation in the bleeding circuitry.
  • Fig. 6 shows a further possible documentation of a bleeding circuit 6'' according to the present invention.
  • the transistor Q5 detects the mains level via the resistor divider R32, R33 and R34.
  • the transistor modulates the transistor Q4, which has a dual role as a current source for a bleeding circuit to support triac holding current and for signaling the bleed activity.
  • the voltage above the transistor Q4 is pulled down and this can be used as a signal (Digital Vout) indicating the activity of the bleeding circuit.
  • the bleeding circuit 6'' is selectively acting to draw a bleeding current in periods when the supply voltage amplitude is below a threshold value.
  • the bleeding circuit 6'' is depending on the phase cut present in the AC supply voltage.
  • the signal (Digital Vout) indicating the non-activity of the bleeding circuit for this example is a kind of digital signal, as is has to be only checked whether the signal is high or low. This gives the advantage that this signal is less susceptible to noise in comparison to an analogue detection, where noise or disturbances would cause errors in the receipted signal.
  • the activation of the bleeding circuit 6, 6' , 6' ' could also be depending on the current out of the output of the first rectifier 3, i.e. flowing into the filter circuit 10 comprising.
  • the bleed current would only be enabled when the current into the filter circuit 10 (or the actively switched PFC circuit 9 or the valley fill circuitry 8) would be below a given threshold.
  • the activity of the bleeding circuit 6' ' can also be sensed on the mains voltage line. The activity may be sensed on the resistor divider R32, R33 and R34, on base-terminal of the transistor Q5 detects the mains level.

Abstract

L'invention porte sur un module de diodes électroluminescentes (DEL) à gradation d'intensité, le module étant conçu pour être atténué à l'aide d'un gradateur commandant une coupure de phase de la tension d'alimentation alternative fournie au module DEL, le module comprenant : un circuit de stabilisation pour agir sélectivement pour absorber un courant de stabilisation dans des périodes où l'amplitude de la tension d'alimentation est inférieure à une valeur seuil, un circuit de commande auquel est fourni un signal indiquant l'activité du circuit de stabilisation, le circuit de commande déterminant, sur la base du signal d'indication d'activité de stabilisation, une valeur représentant la coupure de phase présente dans la tension d'alimentation alternative et délivrant un signal de commande en fonction de la valeur de coupure de la phase, et au moins un circuit d'attaque auquel est fourni ledit signal de commande et ajustant la puissance fournie à un moyen d'éclairage à DEL associé.
PCT/EP2010/065412 2009-10-14 2010-10-14 Gradation d'intensité de del par coupure de phase WO2011045372A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201080045801.XA CN102598857B (zh) 2009-10-14 2010-10-14 Led的切相调光
EP10766043A EP2489242A1 (fr) 2009-10-14 2010-10-14 Gradation d'intensité de del par coupure de phase

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT6392009 2009-10-14
ATGM639/2009 2009-10-14

Publications (1)

Publication Number Publication Date
WO2011045372A1 true WO2011045372A1 (fr) 2011-04-21

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EP (1) EP2489242A1 (fr)
CN (1) CN102598857B (fr)
WO (1) WO2011045372A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012154380A1 (fr) * 2011-05-12 2012-11-15 Osram Sylvania Inc. Circuit pilote pour lampe de source de lumière à semi-conducteur de facteur de forme réduit
DE102012206349A1 (de) 2011-12-23 2013-06-27 Tridonic Gmbh & Co Kg Verfahren und Schaltungsanordnung zum Betrieb von Leuchtmitteln mit Lastsprung
CN103260286A (zh) * 2012-02-15 2013-08-21 通嘉科技股份有限公司 具有调光功能的驱动系统与调光控制器
EP2688368A1 (fr) * 2012-07-20 2014-01-22 Toshiba Lighting & Technology Corporation Dispositif de marquage et système de marquage
WO2014035893A1 (fr) * 2012-08-31 2014-03-06 Marvell World Trade Ltd. Procédé et appareil de commande d'un dispositif d'éclairage
CN104206010A (zh) * 2012-01-20 2014-12-10 欧司朗有限公司 光电子器件设备
WO2014195385A1 (fr) * 2013-06-05 2014-12-11 Koninklijke Philips N.V. Appareil pour commander un module de lumière
JP2015506559A (ja) * 2012-01-06 2015-03-02 コーニンクレッカ フィリップス エヌ ヴェ 負荷、特にはｌｅｄユニットの電流の影響を補償する電気装置及び方法、並びに負荷、特にはｌｅｄユニットを駆動するドライバ装置
US9089012B2 (en) 2013-05-24 2015-07-21 Terralux, Inc. Secondary-side sensing of phase-dimming signal
JP2015207423A (ja) * 2014-04-18 2015-11-19 パナソニックＩｐマネジメント株式会社 点灯装置およびそれを用いた照明器具
WO2016028942A1 (fr) * 2014-08-19 2016-02-25 Abbeydorney Holdings Ltd. Circuit de commande, dispositif d'éclairage et procédé de réduction de la dissipation de puissance
US9277611B2 (en) 2014-03-17 2016-03-01 Terralux, Inc. LED driver with high dimming compatibility without the use of bleeders
US9326344B2 (en) 2012-02-02 2016-04-26 Koninklijke Philips N.V. LED light source with trailing edge phase cut dimming
CN109392216A (zh) * 2018-03-22 2019-02-26 陕西亚成微电子股份有限公司 一种泄放电流自调节的方法及led可控硅调光电路

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11206727B1 (en) 2020-06-23 2021-12-21 Cypress Semiconductor Corporation Pseudo-digital light emitting diode (LED) dimming with secondary-side controller

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1016062A1 (fr) * 1997-08-26 2000-07-05 Color Kinetics Incorporated Procede et dispositif pour eclairage multicolore a diodes electroluminescentes
WO2005115058A1 (fr) * 2004-05-19 2005-12-01 Goeken Group Corp. Circuit de gradation pour del comprenant un moyen permettant de maintenir le courant dans un triac
US20070182347A1 (en) * 2006-01-20 2007-08-09 Exclara Inc. Impedance matching circuit for current regulation of solid state lighting
US20090184662A1 (en) * 2008-01-23 2009-07-23 Cree Led Lighting Solutions, Inc. Dimming signal generation and methods of generating dimming signals
WO2009121956A1 (fr) 2008-04-04 2009-10-08 Lemnis Lighting Patent Holding B.V. Circuit de déclenchement de gradateur, système de gradateur et dispositif à gradation réglable

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1016062A1 (fr) * 1997-08-26 2000-07-05 Color Kinetics Incorporated Procede et dispositif pour eclairage multicolore a diodes electroluminescentes
EP1016062B1 (fr) 1997-08-26 2002-08-07 Color Kinetics Incorporated Procede et dispositif pour eclairage multicolore a diodes electroluminescentes
WO2005115058A1 (fr) * 2004-05-19 2005-12-01 Goeken Group Corp. Circuit de gradation pour del comprenant un moyen permettant de maintenir le courant dans un triac
US20070182347A1 (en) * 2006-01-20 2007-08-09 Exclara Inc. Impedance matching circuit for current regulation of solid state lighting
US20090184662A1 (en) * 2008-01-23 2009-07-23 Cree Led Lighting Solutions, Inc. Dimming signal generation and methods of generating dimming signals
WO2009121956A1 (fr) 2008-04-04 2009-10-08 Lemnis Lighting Patent Holding B.V. Circuit de déclenchement de gradateur, système de gradateur et dispositif à gradation réglable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RAND D ET AL: "Issues, Models and Solutions for Triac Modulated Phase Dimming of LED Lamps", POWER ELECTRONICS SPECIALISTS CONFERENCE, 2007. PESC 2007. IEEE, IEEE, PISCATAWAY, NJ, USA, 17 June 2007 (2007-06-17), pages 1398 - 1404, XP031218489, ISBN: 978-1-4244-0654-8 *

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WO2012154380A1 (fr) * 2011-05-12 2012-11-15 Osram Sylvania Inc. Circuit pilote pour lampe de source de lumière à semi-conducteur de facteur de forme réduit
US8674605B2 (en) 2011-05-12 2014-03-18 Osram Sylvania Inc. Driver circuit for reduced form factor solid state light source lamp
DE102012206349A1 (de) 2011-12-23 2013-06-27 Tridonic Gmbh & Co Kg Verfahren und Schaltungsanordnung zum Betrieb von Leuchtmitteln mit Lastsprung
WO2013092847A1 (fr) 2011-12-23 2013-06-27 Tridonic Gmbh & Co Kg Procédé et circuit permettant de faire fonctionner des moyens d'éclairage à variation brusque de charge
US9445464B2 (en) 2011-12-23 2016-09-13 Tridonic Gmbh & Co Kg Method and circuit arrangement for operating light-emitting means with a sudden load variation
JP2015506559A (ja) * 2012-01-06 2015-03-02 コーニンクレッカ フィリップス エヌ ヴェ 負荷、特にはｌｅｄユニットの電流の影響を補償する電気装置及び方法、並びに負荷、特にはｌｅｄユニットを駆動するドライバ装置
CN104206010A (zh) * 2012-01-20 2014-12-10 欧司朗有限公司 光电子器件设备
US9450505B2 (en) 2012-01-20 2016-09-20 Osram Gmbh Optoelectronic component device
US9326344B2 (en) 2012-02-02 2016-04-26 Koninklijke Philips N.V. LED light source with trailing edge phase cut dimming
CN103260286A (zh) * 2012-02-15 2013-08-21 通嘉科技股份有限公司 具有调光功能的驱动系统与调光控制器
EP2688368A1 (fr) * 2012-07-20 2014-01-22 Toshiba Lighting & Technology Corporation Dispositif de marquage et système de marquage
WO2014035893A1 (fr) * 2012-08-31 2014-03-06 Marvell World Trade Ltd. Procédé et appareil de commande d'un dispositif d'éclairage
US9392654B2 (en) 2012-08-31 2016-07-12 Marvell World Trade Ltd. Method and apparatus for controlling a power adjustment to a lighting device
US9089012B2 (en) 2013-05-24 2015-07-21 Terralux, Inc. Secondary-side sensing of phase-dimming signal
JP2016527661A (ja) * 2013-06-05 2016-09-08 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． 光モジュールの制御装置
WO2014195385A1 (fr) * 2013-06-05 2014-12-11 Koninklijke Philips N.V. Appareil pour commander un module de lumière
US9497818B2 (en) 2013-06-05 2016-11-15 Koninklijke Philips N.V. Apparatus for controlling light module
RU2663197C2 (ru) * 2013-06-05 2018-08-02 Филипс Лайтинг Холдинг Б.В. Устройство для управления световым модулем
US9277611B2 (en) 2014-03-17 2016-03-01 Terralux, Inc. LED driver with high dimming compatibility without the use of bleeders
JP2015207423A (ja) * 2014-04-18 2015-11-19 パナソニックＩｐマネジメント株式会社 点灯装置およびそれを用いた照明器具
WO2016028942A1 (fr) * 2014-08-19 2016-02-25 Abbeydorney Holdings Ltd. Circuit de commande, dispositif d'éclairage et procédé de réduction de la dissipation de puissance
CN109392216A (zh) * 2018-03-22 2019-02-26 陕西亚成微电子股份有限公司 一种泄放电流自调节的方法及led可控硅调光电路
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