EP2335459B1 - Circuit et procédé pour faire varier la lumière émise par un élément luminescent - Google Patents

Circuit et procédé pour faire varier la lumière émise par un élément luminescent Download PDF

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Publication number
EP2335459B1
EP2335459B1 EP08875143.3A EP08875143A EP2335459B1 EP 2335459 B1 EP2335459 B1 EP 2335459B1 EP 08875143 A EP08875143 A EP 08875143A EP 2335459 B1 EP2335459 B1 EP 2335459B1
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EP
European Patent Office
Prior art keywords
voltage
terminal
terminals
dimming
circuit
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.)
Not-in-force
Application number
EP08875143.3A
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German (de)
English (en)
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EP2335459A2 (fr
Inventor
Jürgen Klier
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
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Osram GmbH
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Publication of EP2335459A2 publication Critical patent/EP2335459A2/fr
Application granted granted Critical
Publication of EP2335459B1 publication Critical patent/EP2335459B1/fr
Not-in-force legal-status Critical Current
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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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • 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
    • 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
    • H05B41/38—Controlling the intensity of light
    • H05B41/40—Controlling the intensity of light discontinuously
    • 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
    • H05B41/38—Controlling the intensity of light
    • H05B41/40—Controlling the intensity of light discontinuously
    • H05B41/42—Controlling the intensity of light discontinuously in two steps only

Definitions

  • the invention relates to a circuit and a method for dimming a lamp.
  • Another dimming method is the so-called three-step dimming, which has found widespread use especially in the NAFTA area.
  • Two operating devices are used in one luminaire. Usually operates the first operating device a light source, the second operating device operates two bulbs. The bulbs all have a comparable performance.
  • the luminaire is controlled with two phases. Depending on which phase is switched on, three dimming levels can be realized, the operating devices are either controlled individually or together. If only the first operating device is operated, a light illuminates. If only the second operating device is operated, two lamps light up and both operating devices are activated, all three lamps light up. With lamps of the same power, these dimming levels allow brightness levels of approx. 33%, 66% and 100%. With two operating devices, this variant is very expensive and requires considerable installation effort.
  • An electronic operating device which can operate a gas discharge lamp with two different dimming stages, which are dependent on the switching combination of two switches connected to the operating device.
  • the object of the invention is to avoid the disadvantages mentioned above and in particular to provide an efficient and cost-effective way of dimming a light source.
  • the voltage waveform of the N terminal allows it to mask the dimming functionality, i. the dimming is possible in particular when the voltage curve to the N-terminal meets a predetermined condition.
  • a phase angle between the signals at the L terminals can be efficiently taken into account, and thus the different switching combinations or switching states can be identified.
  • the N-terminal is a pole of an AC voltage, while the other pole of the AC voltage is connectable to the L-terminals. It should be noted that the N-terminal may be any pole of an AC voltage.
  • dimming may include a change in the direction of increasing or decreasing brightness.
  • the at least one lighting means is dimmable provided that the voltage at the N terminal substantially zero or substantially negative to a ground of the circuit (or a ground potential of the circuit, also referred to as "Ground" GND).
  • the present approach enables efficient masking of the L-ports. This advantageously avoids interference and influences of X capacitors and external loads on the L terminals.
  • Each switching input can be connected to a terminal or a pole of the mains voltage (in particular a so-called L connection of the mains voltage) via a switch.
  • a mains voltage with an L-port and an N-port is provided, wherein the L-port of the Mains voltage is connected to the at least two L-connections.
  • a microcontroller is provided for determining the desired value and for setting the lamp control.
  • a microcontroller determines whether the voltage at the N terminal is substantially zero or substantially negative with respect to an internal ground of the circuit.
  • the masking functionality described above can be implemented using the microcontroller.
  • the L-connections can be executed decoupled from the setpoint.
  • One embodiment is that a change in the switching combination is largely free of overshoot.
  • An alternative embodiment is that a threshold value comparison can be carried out for each switching input.
  • a next embodiment is that a filter is provided for the reduction of power-frequency modulations.
  • the switching combinations of the L-terminals are associated with predetermined brightness of the at least one light source.
  • Such a link can be, for example, that predetermined values (eg as a value table) are stored or that a circuit (eg by means of voltage divider) is parameterized such that predetermined values or signals to a lamp control for adjusting the brightness of the at least one light source can be generated ,
  • predetermined values eg as a value table
  • a circuit eg by means of voltage divider
  • a development consists in that the circuit comprises or is a circuit of an electronic ballast or an extension of a circuit of an electronic ballast.
  • An embodiment is that, depending on the voltage profile at the N terminal, the at least one lighting means is dimmed when the voltage at the N terminal is substantially zero or substantially negative with respect to an internal ground of the circuit.
  • Another embodiment is that based on the switching combination of the L terminals, a desired value is determined and depending on the determined setpoint brightness of the at least one light source is set.
  • a lamp, luminaire or a lighting system comprising a circuit as described herein.
  • the present approach allows efficient dimming of at least one light source, in particular at least one lamp or a light-emitting diode.
  • the at least one light source is supplied with electrical power via at least one lamp control.
  • a circuit comprising one input per network connection (L), preferably by means of a pre-filter, a threshold and / or a post-filter suppresses a power frequency modulation of the control signals.
  • overshoots are reduced or (largely) avoided when switching between the network inputs.
  • Such overshoots are based for example on the fact that a changed signal is already present before the previous signal has subsided.
  • the circuit can keep a power setpoint within wide limits regardless of the level of the mains voltage (almost) constant.
  • the presented approach evaluates the voltage at an N-terminal of the mains voltage and deactivates the control or dimming control as long as the voltage at the N-terminal is positive with respect to an internal ground potential. This effectively eliminates noise from X capacitors and external loads on the L terminals.
  • a maximum number of power levels can be implemented for a specific number of power lines (eg 3 different power levels with two L-connections or 7 different power levels with 3 L-connections - in addition to the "power state" of the switched-off light-emitting device ).
  • a multi-stage electronic ballast (ECG) is described for dimming at least one light source.
  • the lighting means may be bulbs of any type.
  • the lamp is powered by a lamp control, the lamp control in turn can be controlled by the dimming control accordingly.
  • the dimming control and the lamp control can be implemented in a single device or in different devices.
  • an electronic ballast with dimming control for a light source is described here by way of example. Accordingly, the dimming control could be performed separately from the electronic ballast or it could be controlled according to several bulbs.
  • the multi-level electronic ballast with dimming control has two L-ports La, Lb and one N-port.
  • the desired dimming position (brightness of the illuminant) can be set by setting two switches S1 and S2 according to the following table of values: S1 S2 dimming out out Out one out 10% out one 33% one one 100%
  • Fig.1 shows a circuit example of an ECG with a dimming functionality.
  • An AC voltage or mains voltage 135 has an L-terminal and an N-terminal.
  • the L terminal of the mains voltage 135 is connected to a node 133 via a series connection of a switch S1 and a first winding of a filter inductor L1. Furthermore, the L terminal of the mains voltage 135 is connected to an account 132 via a series connection of a switch S2 and a second winding of the filter inductor L1.
  • the N terminal of the mains voltage 135 is connected to a node 131 via a third winding of the filter inductor L1.
  • the center tap of the series connection of the switch S2 and the second winding of the filter inductor L1 is connected to the N terminal via an X capacitor Cx1 and the center tap of the series connection of the switch S1 and the first winding of the filter inductor L1 is connected to the N terminal connected.
  • a node between the switch S1 and the first winding of the filter inductor L1 is referred to as a terminal La. Accordingly, a node between the switch S2 and the second winding of the filter inductor L1 is referred to as a terminal Lb.
  • the node 133 is connected to the anode of a diode D3 and to the cathode of a diode D6.
  • the cathode of the diode D3 is connected to a node 136 and the anode of the diode D6 is connected to ground GND.
  • the node 132 is connected to the anode of a diode D2 and to the cathode of a diode D5.
  • the cathode of diode D2 is connected to node 136 and the anode of diode D5 is connected to ground GND.
  • the node 131 is connected to the anode of a diode D1 and to the cathode of a diode D4.
  • the cathode of the diode D1 is connected to the Node 136 and the anode of diode D4 are connected to ground GND.
  • an X-capacitor Cx3 is provided between the bank 136 and ground GND.
  • a lamp controller 110 is connected on the input side to the node 136 and to ground GND. At the output of the lamp control 110, a lighting means 111 is connected. Furthermore, the lamp controller 110 has an input 134, by means of which a brightness of the lamp 111 is adjustable.
  • the value for adjusting the brightness is supplied to the input 134 of the lamp controller 110 by means of a dimming controller 120.
  • the dimming controller 120 is connected on the input side to the nodes 131, 132 and 133.
  • the node 140 is connected to the input 134 of the lamp controller 110.
  • each L terminal La and Lb and the N terminal has its own pair of diodes (La: D3, D6, Lb: D2, D5, N: D1, D4) for rectifying the AC voltage 135.
  • the rectified AC voltage 136 is the Lamp control 110 supplied.
  • the current-compensated filter inductor L1 is provided for sparking and has three windings, one winding for each of the two L-connections La, Lb and the N-connection.
  • At least one X-capacitor (Cx1, Cx2) is provided before or after the filter inductor L1 (in front of the rectifier).
  • a common X-capacitor Cx3 at the input of the lamp controller 110 may be provided.
  • the dimming controller 120 generates a set point (at the node 140) corresponding to the desired dimming position for the lamp controller 110 depending on the voltage at the L terminals La, Lb.
  • Fig.2 shows a voltage waveform 210 of the mains voltage 135 (voltage waveform between the terminals L and N) and a voltage waveform 220 between the terminals L and the ground GND.
  • the voltage curve 220 corresponds to the voltage profile at the node La, ie the voltage V L-GND at La in relation to the internal ground GND comprises the shown power-frequency sinusoidal half-waves 220.
  • These sine half-waves 220 are used to charge the capacitor C1 through resistors R1 and R3 to a voltage about two to three times higher than the reference voltage Vref (about 5V). Due to the relatively small capacitance of capacitor C1, the voltage at node 141 has still significant power frequency modulation. When this voltage at the node 141 is always higher than a voltage Vref + 0.6V, the transistor Q1 is constantly driven via the resistor R5 and holds its collector at the potential of the reference voltage Vref. Thus, a current flow through the resistor R7 is achieved, which is on the one hand practically free of mains frequency modulation and on the other hand, within wide limits, independent of the level of the mains voltage.
  • the small residual modulation due to the finite steep base-emitter characteristic of the transistor Q1 is further smoothed by the capacitor C3.
  • An upper power level or dimming level can be composed of the sum of the two dimming levels described above (both switches S1 and S2 are closed). Accordingly, the signal supplied to the lamp controller 110 at its input 134 for adjusting the brightness of the illuminant 111.
  • this upper power level is different from the sum of the two lower power levels.
  • This can be adjusted via the resistor R9, wherein the resistor R9 can also be switched between the reference voltage Vref and the actual value input of the regulator if required.
  • three power levels or dimming levels on the resistors R7, R8, R9 can be adjusted.
  • the L-terminals La, Lb are opposite of the internal ground GND is not energized, but are drawn through the X capacitors Cx1 and Cx2 or by externally switched loads on N-potential V N-GND.
  • Figure 3 shows the voltage waveform 210 of the mains voltage 135 (voltage waveform between the terminals L and N) and a voltage waveform 230 (V N-GND ) between the terminal N and the ground GND.
  • V L-GND 220 off Fig.2 and V N-GND 230 off Figure 3 differ in their phase position.
  • the phase position of the voltages at the terminals La and Lb must be evaluated. This is done by means of the transistor Q3, which is turned on via the resistor R11, as long as the voltage V N-GND 230 is positive. In this case, the two inputs of the dimming controller 120 are short-circuited via the diodes D7 and D8. This ensures that only the evaluation of in-phase signals takes place.
  • the two diodes D7 and D8 serve to decouple the two inputs (ie nodes 132 and 133).
  • a fast discharge of the capacitors C1 and C2 can each be achieved by choosing a relatively small capacitance supported by a periodic stronger discharge by means of the transistor Q3 and the resistors R3 and R4, respectively.
  • Figure 4 shows a circuit variant in which the two inputs of the dimming controller 120 are not short-circuited, but interrupted as long as the voltage 230 V N-GND is positive.
  • Figure 4 shows in comparison to Fig.1 a changed dimming control 400.
  • the wiring of the dimming control 400 can be done accordingly Fig.1 respectively. This is indicated by the connections of the dimming control 400 to the nodes 131, 132 and 133 and to the input 134 of the lamp control 110 according to FIG Fig.1 ,
  • a block 410 within the dimming controller 400 is also found in the dimming controller 120 according to FIG Fig.1 , Block 410 may correspond to nodes 139, 141 and 140 Fig.1 be identified. Accordingly, the description of the Fig.1 directed.
  • the node 431 is connected to the base of a pnp transistor Q5 through a resistor R24.
  • the emitter of the transistor Q5 is connected to the node via a resistor R23 133 connected.
  • the collector of the transistor Q5 is connected on the one hand to the node 141 and on the other hand via a resistor R28 to the ground GND.
  • the node 431 is connected through a resistor R25 to the base of a PNP transistor Q4.
  • the emitter of the transistor Q4 is connected to the node 132 via a resistor R22.
  • the collector of the transistor Q4 is connected on the one hand to the node 139 and on the other hand via a resistor R27 to the ground GND.
  • the dimming controller 400 uses the two transistors Q4 and Q5, which are only turned on via the resistor R21 as long as the voltage V N-GND is sufficiently small.
  • the dimming controller 400 Since the dimming controller 400 has no means for periodically discharging the two capacitors C1 and C2, the resistors R28 and R27 are respectively grounded to ensure a sufficiently fast discharge upon switching between the dimming stages.
  • the approach presented here can be used to dimming any lamps.
  • a stepwise dimming can be achieved in an efficient manner.
  • Possible applications include emergency lighting or tunnel lighting.

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Claims (16)

  1. Circuit permettant de faire varier l'intensité lumineuse d'au moins un élément luminescent (111),
    - présentant deux bornes L (La, Lb) et une borne N permettant d'émettre une tension de réseau entre les bornes L (La, Lb) et la borne N,
    - présentant une commande de variation d'intensité lumineuse (120) permettant d'exploiter une combinaison de commutation au niveau des bornes L, l'au moins un élément luminescent (111) pouvant voir son intensité lumineuse varier en raison de la combinaison de commutation des bornes L (La, Lb),
    caractérisé en ce que
    la commande de variation d'intensité lumineuse (120) est conçue pour exploiter la tension au niveau de la borne N de la tension de réseau et désactive l'exploitation d'une combinaison de commutation au niveau des bornes L tant que la tension au niveau de la borne N est positive par rapport à un potentiel de masse interne.
  2. Circuit selon l'une des revendications précédentes, dans lequel à l'aide d'une courbe de tension au niveau de la borne N une position de phase est exploitable par des signaux au niveau des bornes L (La, Lb).
  3. Circuit selon l'une des revendications précédentes, dans lequel une tension de réseau (135) est prévue avec une borne L et avec une borne N, dans lequel la borne L de la tension de réseau est reliée avec les au moins deux bornes L (La, Lb).
  4. Circuit selon l'une des revendications précédentes, dans lequel à l'aide de la combinaison de commutation des bornes L (La, Lb) une valeur théorique peut être déterminée et permet d'ajuster une commande de lampe (110).
  5. Circuit selon la revendication 4, dans lequel un microcontrôleur est prévu dans la commande de variation d'intensité lumineuse (120) et permet de déterminer la valeur théorique et d'ajuster la commande de lampe.
  6. Circuit selon la revendication 5, dans lequel le microcontrôleur constate si la tension au niveau de la borne N est pour l'essentiel égale à zéro ou pour l'essentiel négative par rapport à une masse interne du circuit.
  7. Circuit selon l'une des revendications 4 à 6, dans lequel la valeur théorique est ajustable en grande partie indépendamment d'une variation de tension de la tension de réseau.
  8. Circuit selon l'une des revendications précédentes, dans lequel une modification de la combinaison de commutation s'effectue en grande partie sans suroscillation.
  9. Circuit selon l'une des revendications précédentes, dans lequel pour chaque entrée de commutation une comparaison de valeurs de seuil peut être réalisée.
  10. Circuit selon l'une des revendications précédentes, dans lequel un filtre est prévu de manière à réduire les modulations de la fréquence du réseau.
  11. Circuit selon l'une des revendications précédentes, dans lequel les combinaisons de commutation possibles des bornes L (La, Lb) ont pour conséquence des clartés prédéfinies de l'au moins un élément luminescent (111).
  12. Circuit selon l'une des revendications précédentes, dans lequel le circuit comprend ou est un circuit d'un ballast électronique ou un agrandissement d'un circuit d'un ballast électronique.
  13. Procédé permettant de faire varier l'intensité lumineuse d'au moins un élément luminescent (111),
    - dans lequel en fonction d'une combinaison de commutation au niveau des bornes L (La, Lb) par rapport à une borne N l'au moins un élément luminescent voit son intensité lumineuse varier,
    - dans lequel la tension au niveau de la borne N de la tension de réseau est exploitée et l'exploitation d'une combinaison de commutation au niveau des bornes L est désactivée tant que la tension au niveau de la borne N est positive par rapport à un potentiel de masse interne.
  14. Procédé selon la revendication 13, dans lequel en fonction de la courbe de tension au niveau de la borne N l'au moins un élément luminescent voit son intensité lumineuse varier, lorsque la tension au niveau de la borne N est pour l'essentiel égale à zéro ou pour l'essentiel négative par rapport à une masse interne du circuit.
  15. Procédé selon l'une des revendications 13 ou 14, dans lequel à l'aide de la combinaison de commutation des bornes L (La, Lb) une valeur théorique est déterminée et en fonction de la valeur théorique déterminée une clarté de l'au moins un élément luminescent est ajustée.
  16. Procédé selon l'une des revendications 13 à 15, dans lequel à l'aide de la courbe de tension au niveau de la borne N une position de phase de signaux est déterminée au niveau des bornes L.
EP08875143.3A 2008-09-17 2008-09-17 Circuit et procédé pour faire varier la lumière émise par un élément luminescent Not-in-force EP2335459B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/062352 WO2010031429A2 (fr) 2008-09-17 2008-09-17 Circuit et procédé pour faire varier la lumière émise par un élément luminescent

Publications (2)

Publication Number Publication Date
EP2335459A2 EP2335459A2 (fr) 2011-06-22
EP2335459B1 true EP2335459B1 (fr) 2017-01-18

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Application Number Title Priority Date Filing Date
EP08875143.3A Not-in-force EP2335459B1 (fr) 2008-09-17 2008-09-17 Circuit et procédé pour faire varier la lumière émise par un élément luminescent

Country Status (5)

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US (1) US20110156614A1 (fr)
EP (1) EP2335459B1 (fr)
KR (1) KR20110060936A (fr)
CN (1) CN102160468B (fr)
WO (1) WO2010031429A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8319451B2 (en) * 2011-02-10 2012-11-27 Osram Sylvania Inc. Two light level control circuit
US20120249150A1 (en) * 2011-03-31 2012-10-04 Osram Sylvania Inc. Switch status detection circuit for multiple light level lighting systems
US8674617B2 (en) * 2011-03-31 2014-03-18 Osram Sylvania Inc. Multiple light level electronic power converter
WO2020249662A1 (fr) * 2019-06-14 2020-12-17 Signify Holding B.V. Circuit de commande de pilote de del

Citations (1)

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Publication number Priority date Publication date Assignee Title
EP1675443A2 (fr) * 2004-12-13 2006-06-28 Osram-Sylvania Inc. Ballast avec deux niveaux d' intensité lumineuse

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US6069457A (en) * 1998-01-20 2000-05-30 Lumion University Method and apparatus for controlling lights and other devices
CN1144509C (zh) * 2000-03-08 2004-03-31 刘南星 装饰灯组
US6674248B2 (en) * 2001-06-22 2004-01-06 Lutron Electronics Co., Inc. Electronic ballast
US7928664B2 (en) * 2006-04-10 2011-04-19 Emd Technologies, Inc. Illumination systems
CN101558693A (zh) * 2007-01-29 2009-10-14 奥斯兰姆有限公司 用于对发光装置分级调光的电子驱动设备和方法
US7868561B2 (en) * 2007-10-31 2011-01-11 Lutron Electronics Co., Inc. Two-wire dimmer circuit for a screw-in compact fluorescent lamp
US7843141B1 (en) * 2007-11-19 2010-11-30 Universal Lighting Technologies, Inc. Low cost step dimming interface for an electronic ballast

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1675443A2 (fr) * 2004-12-13 2006-06-28 Osram-Sylvania Inc. Ballast avec deux niveaux d' intensité lumineuse

Also Published As

Publication number Publication date
US20110156614A1 (en) 2011-06-30
CN102160468A (zh) 2011-08-17
WO2010031429A3 (fr) 2010-05-14
WO2010031429A2 (fr) 2010-03-25
EP2335459A2 (fr) 2011-06-22
WO2010031429A9 (fr) 2010-06-24
KR20110060936A (ko) 2011-06-08
CN102160468B (zh) 2014-02-19

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