WO2007068622A1 - Schaltungsanordnung und verfahren zum betreiben mindestens einer ersten und einer zweiten lampe - Google Patents
Schaltungsanordnung und verfahren zum betreiben mindestens einer ersten und einer zweiten lampe Download PDFInfo
- Publication number
- WO2007068622A1 WO2007068622A1 PCT/EP2006/069300 EP2006069300W WO2007068622A1 WO 2007068622 A1 WO2007068622 A1 WO 2007068622A1 EP 2006069300 W EP2006069300 W EP 2006069300W WO 2007068622 A1 WO2007068622 A1 WO 2007068622A1
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- WO
- WIPO (PCT)
- Prior art keywords
- lamp
- terminal
- electrode
- coupled
- coil electrode
- Prior art date
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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
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/295—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/295—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
- H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
Definitions
- the present invention relates to a circuit arrangement for operating at least a first and a second lamp, wherein the first and the second lamp ⁇ depending wells first and sen a second coil electrode aufwei-, with a first and a second connection for the first coil electrode of the first lamp, a first and a second terminal for the second filament electrode of the first lamp, a first and a second terminal for the first filament electrode of the second lamp, a first and a second terminal for the second filament electrode of the second lamp, at least one supply port for supplying a supply voltage to the respective first coil electrode of the at least one first and second lamp and at least one Vortexvor- the min ⁇ least direction for the respective first coil electrode has a first and second lamp, said second terminal of the first coil electrode of the first lamp to the second Connecting the first n helical electrode of the second lamp is coupled.
- the invention also relates to a corresponding method of operation for at least one first and one second lamp, each having a first and a second filament electrode.
- the problem addressed by the present invention resides in helical electrode detection multi-lamp ballasts. This is to ensure that when the input voltage is applied, the ballast is only released when the last Wen ⁇ delelektrode is contacted in the base. A release before this time would involve the risk that the full ignition voltage could be transmitted to an operator. In addition to complete filament electrode de- tection, however, the requirements of the filament electrodes for pre- and continuous heating must be met at the same time. From the prior art, no optimal solutions to this problem are known. The previous approaches include either a parallel connection, see Fig. 1, or a series circuit, see Fig. 2, the helical electrodes. The circuit arrangement shown in FIG. 1 has a first lamp LpI and a second lamp Lp2.
- the first lamp LPI has a first spiral electrode ⁇ Wl having a first terminal and a second terminal Al A2 and a second spiral electric ⁇ de W2 having a first terminal and a second Al arrival circuit A2.
- the second lamp Lp2 has a first spiral electrode ⁇ Wl and a second coil electrode W2.
- the first helical electrode Wl comprises a first terminal Al and a second terminal A2.
- the second spiral electrode ⁇ W2 includes a first terminal Al and a second terminal A2.
- a supply voltage U is applied to a point where the terminal Al of the filament electrode Wl of the first lamp LPI to the terminal Al of the coil electrode of the two Wl ⁇ th lamp is coupled Lp2 via a resistor Rl.
- connection point of the terminal A2 of the helical electrode Wl of the first lamp LpI to the terminal A2 of the helical electrode Wl of the second lamp Lp2 is via the series connection of a heating coil Ll and a diode Dl on the one hand connected to the resistor Rl, so that there is a parallel connection of the two first coil electrodes Wl.
- this point is coupled via a resistor R2 to an evaluation unit AWl.
- the object of the present invention is to further develop the above-mentioned circuit arrangement or the aforementioned method such that a reliable coil electrode detection without the undesired consequence of a black coloration of the electric coil is made possible ⁇ in the dimmed state.
- the present invention is based on the recognition that this object can be achieved by a clever combination of series and parallel connection.
- the latter is made possible by providing two preheating devices, wherein the connection point of the two preheating devices is additionally connected by a center tap to the respective second connection of the first helical electrode of each lamp.
- the first terminal of the first turning electrode of the first lamp and the first terminal of the first helix electrode of the second lamp are preferably coupled to the supply terminal.
- the first preheating device is coupled to the first terminal of the first coil electrode of the first lamp charged and the second preheater to the first terminal of the first coil electrode of the second lamp.
- a first diode in the flow direction is coupled between the first preheater and the first terminal of the first filament of the first lamp and between the second preheater and the first terminal of the first filament of the second lamp, a second diode is coupled in the flow direction.
- the coupling of the second terminal of the first filament electrode of the first lamp to the second terminal of the first filament electrode of the second lamp is preferably coupled to an evaluation device.
- the principle on which the present invention is based can be extended to circuit arrangements with more than two lamps.
- a circuit arrangement for example a first and a second terminal for the first coil electrode of a third lamp and a first and a second terminal for the second coil electrode of the third lamp on, wherein the first connection for the first Wendelelekt ⁇ rode of the third lamp in the Supply terminal is coupled, wherein the second terminal for the first Wen ⁇ delektrode of the third lamp is coupled to an evaluation, wherein the first terminal for the second coil electrode of the third lamp is coupled to the first terminal of the second coil electrode of the first lamp and wherein the second terminal for the second coil electrode of the third lamp to a Auswer ⁇ te constructive is coupled.
- the circuit arrangement on a first and a second terminal for a first coil electrode of a third lamp, a first and a second terminal for a second coil electrode of the third lamp, a first and a second terminal for a first coil ⁇ electrode of a fourth lamp and first and second terminals for a second filament electrode of the fourth lamp.
- the at least one supply connection ⁇ further adapted for supplying a supply voltage to the respective first coil electrode of the third and the fourth lamp, wherein the second terminal of the first coil electrode of the third lamp to a second terminal of the first coil electrode of the fourth Lamp is coupled, wherein the preheating further ⁇ out a third and a fourth preheating inductance Before ⁇ heating inductance comprises serially connected to each other angeord ⁇ are net, wherein the coupling of the third and fourth preheating inductance to the coupling of the second terminal of the first coil electrode of the third Lamp and the second terminal of the first coil electrode of the four ⁇ th lamp is coupled.
- the first and the second lamp can also be connected such that the coupling of the second terminal of the first coil ⁇ electrode of the first lamp to the second terminal of the first coil electrode of the second lamp with the Versor- supply connection is coupled.
- the first preheater is coupled to the first terminal of the first coil electrode of the first lamp and the second preheater to the first terminal of the first coil electrode of the second lamp, wherein between the first terminal of the first coil electrode of the ers ⁇ th lamp and a third diode is coupled in the flow direction of the first preheater and wherein between the first terminal of the first filament electrode of the second lamp and the second preheater, a fourth diode is coupled in the flow direction.
- a preferred circuit arrangement with more than two lamps results in that the circuit arrangement has a first and a second terminal for the first coil electrode of a third lamp and a first and ei ⁇ NEN second terminal for the second coil electrode of the third lamp, said first connection for the first coil electrode of the third lamp to a Evaluation ⁇ device is coupled, wherein the second terminal for the first coil electrode of the third lamp is coupled to the Ver ⁇ sorgungsan gleich, the first An ⁇ circuit for the second coil electrode of the third lamp coupled to the first terminal of the second coil electrode of the first lamp t and wherein the second terminal for the second filament electrode of the third lamp is coupled to the supply terminal.
- Fig. 1 is a known from the prior art scarf ⁇ tion arrangement in which the first coil electrode of the first lamp and the first coil electrode of the second lamp are connected in parallel;
- Fig. 2 is a well-known from the prior art scarf ⁇ processing arrangement, wherein the first coil electrode of the first lamp and the first coil electrode of the second lamp are connected in series;
- FIG. 3 shows a first embodiment of a circuit arrangement according to the invention with two lamps
- FIG. 3a shows a variant of the first embodiment of a circuit arrangement according to the invention with two lamps
- FIG. 4 shows a second embodiment of a circuit arrangement according to the invention with two lamps
- FIG. 5 shows a first embodiment of a circuit arrangement according to the invention with three lamps
- Figure 6 shows a second embodiment of an inventive circuit arrangement with ⁇ SEN three lamps.
- 7 shows an embodiment of a circuit arrangement according to the invention with four lamps;
- Fig. 8 shows an embodiment of a circuit arrangement according to the invention with six lamps.
- FIGS. 1 and 2 The reference numbers introduced with reference to the prior art illustrated in FIGS. 1 and 2 are, as far as applicable, retained for the embodiments of a circuit arrangement according to the invention shown in FIGS. 3 to 8 and are not explained again. In this respect, only the differences from the known circuit arrangements presented in FIGS. 1 and 2 will be discussed below.
- both the first terminal Al of the first filament electrode Wl of the first lamp LpI and the first terminal Al of the first filament electrode Wl of the second lamp Lp2 are connected to the supply voltage Uv via an ohmic resistor RI1, R12 connected, which - as apparent to those skilled - preferably represents the so-called intermediate circuit voltage.
- the preheating device comprises a first pre ⁇ heating inductance LIl and a second preheating inductance L12.
- the preheating inductance LIII is connected to the first terminal A1 of the first filament electrode W1 of the first lamp Lp1 via a diode Dil, while the second preheating inductance L12 is connected via a second diode D12 in the flow direction to the first terminal A1 of the first filament electrode W1 of the second lamp Lp2 comparable is bound.
- connection point between the second terminal A2 of the first filament electrode Wl of the first lamp LpI and the second terminal A2 of the second filament electrode W2 of the second lamp Lp2 is connected on the one hand via a resistor R2 to a terminal P7 of the evaluation unit AWl, on the other hand in the manner of a Mittelanzap ⁇ Fung with the connection point between the first preheating inductance LIl and the second preheating inductance L12.
- the center tap is necessary so that during the pre-heating or continuous heating a parallel connection of the respective first coil electrode Wl can be ensured, where ⁇ can be prevented by a black coloration of one of the coil electrodes due to different coil electrode resistance ver ⁇ .
- Continuous heating of the filament W2 of the lamp LpI is an inductance L21 and ei ⁇ ne diode D21 is provided, wherein the terminal Al is connected via an inductance L D with the half-bridge center H B of a half-bridge circuit.
- the connection A2 of the filament W2 of the lamp Lp2 is connected via a resistor R8 to the supply voltage Uv.
- the signal at the output Al is fed via a resistor R7 to the terminal P6 of the evaluation ⁇ unit AWl.
- the primary windings to the inductors L21, L22, LIl and L12 are not shown for the sake of clarity.
- an actual value detection of the lamp current of the lamp Lp2 is performed at the input P2 of the evaluation unit AW1.
- the supply voltage connections which are identified uniformly by Uv, may be connected to supply voltages Uv of different amplitudes, where appropriate for evaluation by the evaluation unit. The latter applies to all embodiments shown in FIGS. 4 to 8.
- FIG. 3 a shows in section an alternative variant to the embodiment according to FIG. 3.
- the polarity of the diode Dil is reversed in FIG. 3a.
- resistors R12 and RIl there is no DC path for a current passing through resistors R12 and RIl and only one of the coils Wl of lamps LpI and Lp2.
- the resistor R12 is connected via the connection P3a to the evaluation unit.
- Advantageous over the Va ⁇ riante of Figure 3 does not need the evaluation unit at the terminal P3a on different amplitudes, the two coils WI lamps LPI and Lp2 query.
- connection P7 and the associated resistor R2 can be dispensed with.
- the Topolgie the circuit arrangement is simplified ⁇ advantageous way.
- the first terminal A1 of the first helical electrode Wl of the first lamp Lp3 is connected to the input P1 of the evaluation unit AW1 via a resistor R21, the first terminal A1 of the first helix W1 of the second lamp Lp4 to the input P4 of the evaluation unit AW1 via a resistor R22 connected.
- the first terminal Al of the first coil electrode of the Wl ers ⁇ th Lp3 lamp is connected via a diode D13 having a first preheating inductance L13 while the first check end Al of the first coil electrode of the second LAM Wl PE Lp4 is connected via a diode D14 to a second preheating inductance L14.
- the connection point of the two Vorholicinduktterrorismen L13 and L14 is connected via a center tap to the connection point of the terminals A2 of the first coil Wl the first lamp Lp3 and A2 of the first coil electrode Wl the second lamp Lp4.
- a parallel connection of the two first coil electrodes W 1 is again made possible in the preheating or continuous heating mode, while a spiral electrode detection is made possible via the signals supplied to the evaluating unit AW 1 at their inputs.
- the diode D23 and the inductor L23 serve to pre-heat the second filament W2 of the first lamp Lp3, while the diode D24 and the inductor L24 serve to preheat the second filament electrode W2 of the second lamp Lp4.
- the function of the elements R6, P5, R9, C32, D31 and D32 corresponds to the function of the elements R7, P6, R8, C31, D32, D31 in the embodiment of FIG. 3.
- monitoring of the filament W2 of the lamp LpI and of the filament W2 of the lamp LP3 can also be dispensed with. This is only necessary if, in a multi-lamp operation, a balancing transformer (compare L31, L32 in Fig. 5) is used, which supplies the ignition voltage "from below".
- Fig. 5 illustrates a further development of the pre in FIG. 3 ⁇ presented embodiment in the form of a variant with three lamps LPi, Lp2, Lp6 is.
- the third lamp Lp6 has a first coil Wl with a first and a second terminal Al, A2 and a second coil W2 with a first and a second terminal Al, A2 on.
- the terminal Al of the second filament W2 of the lamp Lp6 is connected to the terminal Al of the second filament W2 of the lamp LpI.
- the terminal A2 of the second coil W2 of the lamp Lp6 is connected via a resistor R3 to the terminal PO of the evaluation unit.
- the port A2 of the filament of the lamp Lp6 Wl is connected integral via ei ⁇ NEN resistor R6 to the port P5 of the Ausireein ⁇ .
- the terminal Al of the filament Wl of the lamp Lp6 is connected via a resistor R9 to the supply terminal Uv.
- An inductance L23 and a diode D23 connected in series therewith as well as an inductance L24 and a diode D24 connected in series serve again for the preheating or continuous heating of the associated turnings.
- the circuit arrangement moreover has a symmetrizing transformer which comprises the inductors L31 and L32.
- the half-bridge coupling capacitors C31 and C32 are arranged in series with these two inductors L31, L32.
- the coupling capacitor C32 is connected via a diode D32 to ground, the coupling capacitor C31 is integrated Auspawein ⁇ connected via a diode D31 to the terminal P2 to Istwerterkennung the lamp current.
- the embodiment shown in Fig. 6 is a Wei ⁇ ter Struktur the embodiment shown in Fig. 4 to the use of three lamps Lp3, Lp4, Lp5, but the lamps Lp3, Lp4 are shown mirrored of the circuit to the arrangement in Fig. 4 ,
- the second filament W2 is evaluated the lamp Lp4 the terminal Al, designated P5.
- the terminal Al of the coil W2 of the lamp Lp3 via a resistor R4 the input PO of the evaluation ⁇ unit supplied.
- the exporting ⁇ shown in Fig. 6 approximate shape has advantages over the embodiment of Fig. 4, another lamp Lp5.
- the terminal 1 of the filament Wl of the lamp Lp5 is fed via a resistor R7 to the input P6 of the evaluation unit, the terminal A2 of Wen ⁇ del Wl the lamp Lp5 via a resistor R8 connected to the supply voltage Uv.
- the terminal A1 of the filament W2 of the lamp Lp5 is connected to the terminal A2 of the filament W2 of the lamp Lp3.
- the terminal A2 of the filament W2 of the lamp Lp5 is connected via a resistor R4 to the supply voltage Uv.
- Series circuits each of an inductor and a diode, that is, the Se ⁇ rien circuit D21 L21 and L22, the series circuit D22, in turn, are used for preparation or heating time of the associated filaments of the lamp Lp5.
- the function of the elements C31, C32, D31, D32, L31, L32 corresponds to that of FIG. 5.
- FIG. 7 corresponds ei ⁇ ner combination of the left two lamps LPI, LP2 according to the embodiment of FIG. 5 and the right two lamps Lp3, Lp4 the embodiment of FIG. 6.
- the facts that the wiring at the two terminals Al, A2 are interchanged by a spiral Wl or W2 in the embodiment of Fig. 7 with respect to the embodiments of FIG. 5 or FIG. 6, as the skilled man of ⁇ fenamide, for the evaluation of no importance.
- FIG. 8 shows an embodiment with six lamps LpI, Lp2, Lp3, Lp4, Lp6, Lp6, wherein the embodiment according to FIG. 8 is composed of the embodiment of FIG. 5, the lamps LpI, Lp2 and Lp6 being adopted by them and the embodiment of Fig. 6 from which the lamps Lp3, Lp4 and Lp5 have been adopted.
- the inductors LIl, L12, L13 and L14 form the secondary windings of a first heating transformer, while the inductors L21, L22, L23 and L24 form the secondary windings to form a second heating transformer.
- the A ⁇ gears are PO, Pl and P4, where available, connected to digital inputs of a microprocessor of the evaluating unit IL, while the inputs P5, P6 and P7 are connected to analog inputs of a microprocessor of the evaluating unit AW. If the filament electrode W2 of the lamp LpI and the filament electrode W2 of the lamp Lp3 are inserted, a digital "1" is present at the input PO, otherwise a "0". The same applies to the Wendelelekt ⁇ clear WI lamp Lp4 and WI lamp Lp 3, the PI and P4 are monitored at the inputs. At the input P7 it can be determined whether the filament electrodes Wl and W2 of the lamp LpI are inserted.
- the input P5 it can be determined whether the filament electrodes W2 of the lamp Lp4 or Wl of the lamp Lp6 are inserted.
- the input P6 it can be determined whether the filament electrodes W2 of the lamp Lp2 or Wl of the lamp Lp5 are inserted.
- the input P2 is, as already mentioned, the detection of the actual value of the lamp current for a Regelein ⁇ direction, not shown.
- the above-mentioned continuous heating of the helical electrodes is particularly considered when dimming the lamps to prevent blackening of the helical electrodes.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Keying Circuit Devices (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06830350A EP1961277B1 (de) | 2005-12-16 | 2006-12-05 | Schaltungsanordnung und verfahren zum betreiben mindestens einer ersten und einer zweiten lampe |
CN2006800472256A CN101331808B (zh) | 2005-12-16 | 2006-12-05 | 用于驱动至少一个第一灯和至少一个第二灯的电路装置和方法 |
AT06830350T ATE463150T1 (de) | 2005-12-16 | 2006-12-05 | Schaltungsanordnung und verfahren zum betreiben mindestens einer ersten und einer zweiten lampe |
CA002633860A CA2633860A1 (en) | 2005-12-16 | 2006-12-05 | Circuit arrangement and method for operating at least one first and a second lamp |
US12/086,476 US8067899B2 (en) | 2005-12-16 | 2006-12-05 | Circuit arrangement and method for operating at least one first and a second lamp |
DE502006006608T DE502006006608D1 (de) | 2005-12-16 | 2006-12-05 | Schaltungsanordnung und verfahren zum betreiben mindestens einer ersten und einer zweiten lampe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005060345.9 | 2005-12-16 | ||
DE102005060345A DE102005060345A1 (de) | 2005-12-16 | 2005-12-16 | Schaltungsanordnung und Verfahren zum Betreiben mindestens einer ersten und einer zweiten Lampe |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007068622A1 true WO2007068622A1 (de) | 2007-06-21 |
Family
ID=37796518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2006/069300 WO2007068622A1 (de) | 2005-12-16 | 2006-12-05 | Schaltungsanordnung und verfahren zum betreiben mindestens einer ersten und einer zweiten lampe |
Country Status (7)
Country | Link |
---|---|
US (1) | US8067899B2 (de) |
EP (1) | EP1961277B1 (de) |
CN (1) | CN101331808B (de) |
AT (1) | ATE463150T1 (de) |
CA (1) | CA2633860A1 (de) |
DE (2) | DE102005060345A1 (de) |
WO (1) | WO2007068622A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5422546A (en) * | 1978-03-20 | 1995-06-06 | Nilssen; Ole K. | Dimmable parallel-resonant electric ballast |
DE19634850A1 (de) * | 1996-08-28 | 1998-03-05 | Tridonic Bauelemente | Elektronisches Vorschaltgerät für Gasentladungslampen |
DE69916251T2 (de) * | 1998-12-22 | 2005-03-10 | Koninklijke Philips Electronics N.V. | Elektron9sches hochfrequenzvorschaltgerät zum unabhängigen betrieb von mehreren lampen |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4006384A (en) * | 1976-01-06 | 1977-02-01 | Westinghouse Electric Corporation | Lead-lag, series-sequence starting and operating apparatus for three to six fluorescent lamps |
US5331253A (en) * | 1992-08-24 | 1994-07-19 | Usi Lighting, Inc. | Electronic ballast for gaseous discharge lamp operation |
DE10252836A1 (de) * | 2002-11-13 | 2004-05-27 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Vorrichtung zum Betreiben von Entlaudungslampen |
DE102005001326A1 (de) * | 2005-01-11 | 2006-07-20 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Elektronisches Vorschaltgerät (EVG) |
-
2005
- 2005-12-16 DE DE102005060345A patent/DE102005060345A1/de not_active Withdrawn
-
2006
- 2006-12-05 WO PCT/EP2006/069300 patent/WO2007068622A1/de active Application Filing
- 2006-12-05 CN CN2006800472256A patent/CN101331808B/zh not_active Expired - Fee Related
- 2006-12-05 DE DE502006006608T patent/DE502006006608D1/de active Active
- 2006-12-05 CA CA002633860A patent/CA2633860A1/en not_active Abandoned
- 2006-12-05 AT AT06830350T patent/ATE463150T1/de active
- 2006-12-05 EP EP06830350A patent/EP1961277B1/de not_active Not-in-force
- 2006-12-05 US US12/086,476 patent/US8067899B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5422546A (en) * | 1978-03-20 | 1995-06-06 | Nilssen; Ole K. | Dimmable parallel-resonant electric ballast |
DE19634850A1 (de) * | 1996-08-28 | 1998-03-05 | Tridonic Bauelemente | Elektronisches Vorschaltgerät für Gasentladungslampen |
DE69916251T2 (de) * | 1998-12-22 | 2005-03-10 | Koninklijke Philips Electronics N.V. | Elektron9sches hochfrequenzvorschaltgerät zum unabhängigen betrieb von mehreren lampen |
Also Published As
Publication number | Publication date |
---|---|
DE502006006608D1 (de) | 2010-05-12 |
ATE463150T1 (de) | 2010-04-15 |
EP1961277B1 (de) | 2010-03-31 |
CN101331808A (zh) | 2008-12-24 |
DE102005060345A1 (de) | 2007-06-21 |
CA2633860A1 (en) | 2007-06-21 |
EP1961277A1 (de) | 2008-08-27 |
CN101331808B (zh) | 2011-12-14 |
US20100072918A1 (en) | 2010-03-25 |
US8067899B2 (en) | 2011-11-29 |
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