EP0422255A1 - Ballast électronique - Google Patents

Ballast électronique Download PDF

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Publication number
EP0422255A1
EP0422255A1 EP89118713A EP89118713A EP0422255A1 EP 0422255 A1 EP0422255 A1 EP 0422255A1 EP 89118713 A EP89118713 A EP 89118713A EP 89118713 A EP89118713 A EP 89118713A EP 0422255 A1 EP0422255 A1 EP 0422255A1
Authority
EP
European Patent Office
Prior art keywords
voltage
lamp
fluorescent lamp
hmg
variable
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.)
Granted
Application number
EP89118713A
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German (de)
English (en)
Other versions
EP0422255B1 (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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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
Priority to EP89118713A priority Critical patent/EP0422255B1/fr
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to ES89118713T priority patent/ES2049790T3/es
Priority to AT89118713T priority patent/ATE102430T1/de
Priority to DE89118713T priority patent/DE58907133D1/de
Priority to US07/592,125 priority patent/US5066894A/en
Priority to JP2269688A priority patent/JPH07101638B2/ja
Publication of EP0422255A1 publication Critical patent/EP0422255A1/fr
Application granted granted Critical
Publication of EP0422255B1 publication Critical patent/EP0422255B1/fr
Priority to HK123395A priority patent/HK123395A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3925—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by frequency variation

Definitions

  • the invention relates to an electronic ballast with an inverter in the form of a switch bridge, on the output side of which at least one load circuit consisting of the series connection of a lamp inductor with the parallel connection of an ignition capacitor and a fluorescent lamp is connected, in which a controller acting on the control of the switches of the inverter is connected It is provided which, depending on the lamp power or the lamp current, stabilizes the luminous flux of the fluorescent lamp by means of a comparison between a reference variable (target value) and a measured variable (actual value) derived from the lamp power or the lamp current and, at the same time, regulates the brightness depending on the size of the target value which can be set the fluorescent lamp within wide limits.
  • a reference variable target value
  • actual value measured variable
  • Electronic ballasts of this type are known for example from the literature DE 3709004 A1. If such an electronic ballast is used for dimming a fluorescent lamp within wide limits, particular difficulties arise when the positions are ⁇ 10% of the nominal luminous flux.
  • the fluorescent lamps have large tolerances with regard to their electrical properties, are sensitive to changes in temperature and are subject to signs of aging. There is therefore a risk that when the fluorescent lamp is dimmed to low values by tearing off the discharge, the fluorescent lamp goes out.
  • the controller regulates the brightness of the fluorescent lamp via its discharge current.
  • this principle fails at positions ⁇ 10% of the nominal luminous flux, since the differential current transformer required for this would have to be completely free of stray fields. In the 1% dimming position, a leakage flux of the residual current transformer of only 1% of the main flow would falsify the measurement result by approx. 100%.
  • the regulation can also take place via the lamp power, as is shown, for example, by the literature reference DT 2544364 A1.
  • this has the disadvantage that only the sum of lamp power and filament heating power can be regulated.
  • the filament heating capacity depends heavily on the filament resistance with tolerance.
  • this type of control can only be used to a limited extent with dimming settings ⁇ 10% of the nominal light output. For example, in a dimming position of 1% of the nominal light output, the lamp output to be regulated for conventional fluorescent lamps is approximately 0.5 W, but the heating output is approximately 4 W. Satisfactory synchronism between several fluorescent lamps cannot be guaranteed in this way at positions ⁇ 10%.
  • the invention has for its object to provide a dimmable electronic ballast regardless of whether a discharge current or a power control of the fluorescent lamp is used to provide a solution that, with little additional effort, a safe dimming even at dimming positions below 10% of the nominal luminous flux allows down to less than 1%.
  • the invention is based on the finding that when the fluorescent lamp is dimmed, the discharge current mainly changes, while the operating voltage - at least in terms of magnitude - remains the same. This means that the voltage-current ratio, that is, the resistance of the discharge gap as the brightness of the fluorescent lamp diminishes, increases and finally tends towards infinity if the discharge breaks off.
  • a fluorescent lamp can therefore still be operated safely at 1% of its nominal luminous flux if the discharge resistance is also monitored and the control variable derived from this in the sense of a correction of the control variable for the controller in the lower range the brightness control is used.
  • ballast can recognize whether the lamp is on without the need for optoelectronic devices or a residual current transformer for lamp current detection. This can be used, for example, in the case of electronic ballasts intended for warm starts to control the preheating phase of the fluorescent lamp, since premature ignition of the fluorescent lamp can be recognized and immediately switched from preheating to operation.
  • the block diagram of a dimmable electronic ballast essentially consists of the inverter WR, which is connected on the output side to the load circuit.
  • the load circuit consists of the series connection of the lamp inductor L1 with the fluorescent lamp LL, which is the ignition capacitor C2 in parallel.
  • the inverter WR uses a half-bridge circuit comprising the two switches T1, T2, which are connected in series and represent power transistors, and the half-bridge capacitor C1, to which the discharge resistor R1 is connected in parallel.
  • the common connection point of half-bridge capacitor C1, discharge resistor R1 and the upper electrode of the fluorescent lamp LL is denoted by A and the connection point of the lower electrode to the lamp inductor L1 by B.
  • the switches T1 and T2 of the half-bridge circuit are controlled by the oscillator O, which in turn is connected to the output of the controller RR via its control input.
  • the control input of the controller RR is preceded by a summer SR having comparator properties, the three inputs of which are supplied with the setpoint SW, the actual value IW and the auxiliary control variable HMG.
  • the correct addition of the actual value IW, the setpoint SW and the auxiliary control variable HMG result in the control deviation RAW, which is fed from the output of the summer SR to the control input of the controller RR.
  • the target value SW, the actual value IW and the auxiliary control variable HMG are DC voltages, which together result in the control deviation RAW, which also represents a DC voltage.
  • the power supply for the inverter WR is usually carried out in the form of a DC voltage, which is obtained from the AC mains voltage and is indicated in FIG. 1 as DC link voltage Uzw.
  • This DC link voltage is due to the series connection of the two switches T1 and T2.
  • the half-bridge capacitor C1 and the discharge resistor R1 are in turn connected to the positive pole of the DC link voltage Uzw.
  • the auxiliary control variable HMG is taken from the resistors R2 and R3 at the tap of a voltage divider R2 / R3, which in turn is connected from the connection point A to the negative pole of the DC link voltage Uzw.
  • the setpoint value SW representing a reference voltage is usually generated by a DC voltage which can be adjusted in size and which is not shown in FIG. 1 and the other figures.
  • the actual value IW which also represents a direct voltage, is either proportional to the discharge current flowing through the fluorescent lamp LL or else to the lamp power. It can be obtained in a known manner via a differential current transformer or via a current-voltage measurement in the area of the load circuit. The circuitry representation of such an actual value detection is also not omitted in FIG. 1, as in the other figures.
  • half the DC link voltage Uzw is set at the connection point B when the fluorescent lamp LL is lit, superimposed by the alternating voltage of the fluorescent lamp LL.
  • the half-bridge capacitor C1 and the discharge resistor R1 lying parallel to it are usually so large that half the DC link voltage Uzw also occurs at the nominal luminous flux of the fluorescent lamp at the connection point A.
  • the discharge resistor R1 is substantially larger than the discharge resistor of the fluorescent lamp, so that the discharge of the half-bridge capacitor C1 caused by the discharge resistor R1 can be practically neglected.
  • the high-frequency lamp current causes only a small voltage drop across the half-bridge capacitor C1.
  • the discharge resistance of the fluorescent lamp LL becomes so great that the discharge resistor R1 can partially discharge the half-bridge capacitor C1.
  • the potential at the connection point A increases and the auxiliary control variable HMG divided down via the voltage divider R2 / R3 at the tap of this voltage divider changes in a positive direction.
  • the auxiliary control variable HMG thus counteracts a further reduction in the lamp power and prevents the unwanted tearing of the discharge beyond the controller RR.
  • the change in the auxiliary control variable HMG described has a noticeable effect only in the immediate vicinity of the lower limit of the brightness control range of the fluorescent lamp LL, because only in this range does the potential at the connection point A increase significantly.
  • This type of derivation of the auxiliary control variable HMG from the size of the discharge resistance of the fluorescent lamp LL by means of a DC voltage measurement presupposes that no rectifier effects per se occur in the fluorescent lamp.
  • Such a rectifier effect can occur, for example, if there are large differences in the emissivity of the electrodes of the fluorescent lamp LL. If the dependence of the DC voltage measurement and thus the generation of the auxiliary control variable HMG on such a rectifier effect should be excluded, then the auxiliary control variable HMG can also be derived from an AC voltage.
  • a corresponding exemplary embodiment is shown in FIG. 2.
  • the auxiliary control variable HMG is advantageously derived by superimposing a low-frequency AC voltage, which is tapped at the fluorescent lamp LL.
  • the fluorescent lamp LL is additionally connected to the mains AC voltage Un via coupling elements KE1, for example in the form of coupling resistors Rk.
  • the low-frequency burning AC voltage thus occurring on the fluorescent lamp LL is then fed via further coupling elements KE2, which block the high-frequency component of the burning AC voltage and also the DC component, to the rectifier GL, which is followed by a filter element SG for smoothing the rectified low-frequency component of the AC burning voltage.
  • the voltage divider R2 / R3, which is already known from FIG. 1, is connected in parallel with the output of the filter element SG, and the auxiliary control variable HMG is present at its tap.
  • the coupling elements KE2 expediently consist of the series connection of a filter choke Ls and a filter capacitor Cs.
  • a threshold for example in the form of an additional threshold, can be added to the connection path of the tap of the voltage divider R2 / R3 to the summer SR, as shown in FIG. 3 a Zener diode D1. Only when the auxiliary control variable HMG at the tap of the voltage divider R2 / R3 with a dimming setting of, for example, one or two percent of the nominal luminous flux has become so large that the zener diode becomes low-resistance does the additional regulation prevent the discharge from breaking off. The behavior of the controller in the Brightness control range above this threshold is then not influenced in the desired manner by this additional control.
  • the Zener diode D1 is entered in the circuit diagram according to FIG. 3.
  • the circuit according to FIG. 3 represents a further development of the circuit according to FIG. 1.
  • the circuit according to FIG. 3 differs from the circuit according to FIG. 1 the additional circuit ZS.
  • a further auxiliary controlled variable HMG1 is generated via this additional circuit ZS, which is superimposed on the auxiliary controlled variable HMG with the same effect. As a result, the control speed of the additional control is significantly increased.
  • the change in the discharge resistance during a dimming process of the fluorescent lamp in the direction of decreasing brightness results in a relatively slow change in the potential at the connection point A, because the large circuit dictates the large time constant of the half-bridge capacitor C1 and the discharge resistor R1. If the dimensions are unfavorable, control vibrations can occur. However, the dynamic behavior of the controller can be significantly improved by the additional circuit ZS because the influence of this large time constant can be reduced. If the lamp power is greatly reduced to values below 10% of the nominal power, the burning voltage of the fluorescent lamp decreases with the lamp power.
  • the additional circuit ZS takes advantage of this by generating a DC voltage from the AC combustion voltage which is proportional to the AC combustion voltage and is superimposed on the auxiliary control variable HMG with the correct sign in the sense of the desired regulation as a further auxiliary control variable HMG1.
  • FIG. 4 A preferred embodiment of the additional circuit ZS according to FIG. 3 is shown in FIG. 4. It consists between the connection point B and the negative pole of the DC link voltage Uzw from the series connection of the capacitor C3 with the voltage divider R4 / R5 from the resistors R4 and R5.
  • the divided portion of the AC combustion voltage across resistor R5 is now rectified via diode D2 and the rectified AC combustion voltage is fed to the parallel circuit comprising capacitor C4 and resistor R6.
  • the change in the rectified AC combustion voltage at capacitor C4 is then fed via capacitor C5 to resistor R3 of voltage divider R2 / R3 as a further auxiliary control variable HMG1.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Organic Insulating Materials (AREA)
  • Discharge Heating (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Glass Compositions (AREA)
  • Furan Compounds (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
EP89118713A 1989-10-09 1989-10-09 Ballast électronique Expired - Lifetime EP0422255B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
ES89118713T ES2049790T3 (es) 1989-10-09 1989-10-09 Adaptador electronico.
AT89118713T ATE102430T1 (de) 1989-10-09 1989-10-09 Elektronisches vorschaltgeraet.
DE89118713T DE58907133D1 (de) 1989-10-09 1989-10-09 Elektronisches Vorschaltgerät.
EP89118713A EP0422255B1 (fr) 1989-10-09 1989-10-09 Ballast électronique
US07/592,125 US5066894A (en) 1989-10-09 1990-10-03 Electronic ballast
JP2269688A JPH07101638B2 (ja) 1989-10-09 1990-10-09 スイツチブリツジとして構成されたインバータを有する電子式補助スイツチング装置
HK123395A HK123395A (en) 1989-10-09 1995-07-27 Electronic ballast

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89118713A EP0422255B1 (fr) 1989-10-09 1989-10-09 Ballast électronique

Publications (2)

Publication Number Publication Date
EP0422255A1 true EP0422255A1 (fr) 1991-04-17
EP0422255B1 EP0422255B1 (fr) 1994-03-02

Family

ID=8201999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118713A Expired - Lifetime EP0422255B1 (fr) 1989-10-09 1989-10-09 Ballast électronique

Country Status (7)

Country Link
US (1) US5066894A (fr)
EP (1) EP0422255B1 (fr)
JP (1) JPH07101638B2 (fr)
AT (1) ATE102430T1 (fr)
DE (1) DE58907133D1 (fr)
ES (1) ES2049790T3 (fr)
HK (1) HK123395A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0461441A1 (fr) * 1990-06-06 1991-12-18 Zumtobel Aktiengesellschaft Procédé et circuit pour régler l'intensité lumineuse (atténuer) de lampes à décharge
EP0852453A1 (fr) * 1997-01-03 1998-07-08 Oy Helvar Ballast électronique pour une lampe à décharge, avec mesure de la puissance de la lampe en utilisant un signal à courant continu
EP0853445A1 (fr) * 1997-01-03 1998-07-15 Oy Helvar Ballast électronique réglable et équipé pour mesure la puissance de la lampe
WO1998046049A1 (fr) * 1997-04-08 1998-10-15 Kbl Solarien Ag Procede et circuit pour faire fonctionner un element electrique lumineux
EP1148768A3 (fr) * 2000-04-14 2004-01-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Stabilisation dans le contrôle de lampes à décharge
EP1708549A3 (fr) * 2005-03-22 2007-04-25 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ballast avec dispositif de gradation
EP1784062A1 (fr) * 2005-05-10 2007-05-09 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ballast électronique et procédure de réglage
US7327099B2 (en) 2005-03-22 2008-02-05 Patent-Treuhand-Gesellschaft für elektrische Glühlamplen mbH Ballast having a dimming device
DE202009004449U1 (de) 2009-04-02 2009-06-18 Kbl Solarien Ag Ganzkörperbestrahlungsgerät
EP2059097A4 (fr) * 2006-08-31 2011-04-20 Panasonic Elec Works Co Ltd Dispositif de commande de lampe à décharge et dispositif d'éclairage
WO2011070470A1 (fr) * 2009-12-08 2011-06-16 Koninklijke Philips Electronics N.V. Procede et dispositif pour exciter une lampe fluorescente
DE102010031219A1 (de) * 2010-07-12 2012-01-12 Osram Gesellschaft mit beschränkter Haftung Schaltungsanordnung und Verfahren zum Betreiben mindestens einer Entladungslampe

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5198726A (en) * 1990-10-25 1993-03-30 U.S. Philips Corporation Electronic ballast circuit with lamp dimming control
US5384516A (en) * 1991-11-06 1995-01-24 Hitachi, Ltd. Information processing apparatus including a control circuit for controlling a liquid crystal display illumination based on whether illuminatio power is being supplied from an AC power source or from a battery
US5369339A (en) * 1991-12-16 1994-11-29 U.S. Philips Corporation Circuit arrangement for reducing striations in a low-pressure mercury discharge lamp
DE4340604A1 (de) * 1993-08-25 1995-03-02 Tridonic Bauelemente Ges Mbh Elektronisches Vorschaltgerät zum Versorgen einer Last, beispielsweise einer Lampe
JP2891449B2 (ja) * 1994-08-03 1999-05-17 株式会社日立製作所 放電灯点灯装置
US5612595A (en) * 1995-09-13 1997-03-18 C-P-M Lighting, Inc. Electronic dimming ballast current sensing scheme
US5612594A (en) * 1995-09-13 1997-03-18 C-P-M Lighting, Inc. Electronic dimming ballast feedback control scheme
DE19708783C1 (de) * 1997-03-04 1998-10-08 Tridonic Bauelemente Verfahren und Vorrichtung zum Regeln des Betriebsverhaltens von Gasentladungslampen
US5770925A (en) * 1997-05-30 1998-06-23 Motorola Inc. Electronic ballast with inverter protection and relamping circuits
DE19928042A1 (de) * 1999-06-18 2000-12-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zum Betreiben mindestens einer Leuchtstofflampe sowie elektronisches Vorschaltgerät dafür
DE10240807A1 (de) 2002-08-30 2004-03-11 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren zum Betreiben von Leuchtstofflampen und Vorschaltgerät
DE10306347A1 (de) * 2003-02-15 2004-08-26 Hüttinger Elektronik GmbH & Co. KG Leistungszufuhrregeleinheit
EP1720195B1 (fr) * 2005-05-06 2012-12-12 HÜTTINGER Elektronik GmbH + Co. KG Système pour la suppression d'arcs
US20100264729A1 (en) * 2005-12-26 2010-10-21 Nec Corporation Power supply circuit and lighting system
US20090295300A1 (en) * 2008-02-08 2009-12-03 Purespectrum, Inc Methods and apparatus for a dimmable ballast for use with led based light sources
US20090200960A1 (en) * 2008-02-08 2009-08-13 Pure Spectrum, Inc. Methods and Apparatus for Self-Starting Dimmable Ballasts With A High Power Factor
DE102011082239B3 (de) * 2011-09-07 2013-01-17 Osram Ag Elektronisches Vorschaltgerät und Verfahren zum Betreiben einer Entladungslampe
DE102011082245B3 (de) 2011-09-07 2013-01-17 Osram Ag Elektronisches Vorschaltgerät und Verfahren zum Betreiben einer Entladungslampe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989976A (en) * 1975-10-07 1976-11-02 Westinghouse Electric Corporation Solid-state hid lamp dimmer
EP0127101B1 (fr) * 1983-05-27 1987-03-04 Siemens Aktiengesellschaft Convertisseur à courant alternatif continu pour alimenter des lampes à décharge
DE3709004A1 (de) * 1987-03-19 1988-09-29 Knobel Elektro App Schaltungsanordnung zur speisung einer leuchtstofflampe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5626616B2 (fr) * 1972-09-19 1981-06-19
US3999100A (en) * 1975-05-19 1976-12-21 Morton B. Leskin Lamp power supply using a switching regulator and commutator
US4628230A (en) * 1985-08-05 1986-12-09 Mole-Richardson Company Regulated light dimmer control
JPS6476699A (en) * 1987-09-16 1989-03-22 Toshiba Electric Equip Discharge lamp lighting device
DE3829388A1 (de) * 1988-08-30 1990-03-01 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer last

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989976A (en) * 1975-10-07 1976-11-02 Westinghouse Electric Corporation Solid-state hid lamp dimmer
EP0127101B1 (fr) * 1983-05-27 1987-03-04 Siemens Aktiengesellschaft Convertisseur à courant alternatif continu pour alimenter des lampes à décharge
DE3709004A1 (de) * 1987-03-19 1988-09-29 Knobel Elektro App Schaltungsanordnung zur speisung einer leuchtstofflampe

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0461441A1 (fr) * 1990-06-06 1991-12-18 Zumtobel Aktiengesellschaft Procédé et circuit pour régler l'intensité lumineuse (atténuer) de lampes à décharge
EP0852453A1 (fr) * 1997-01-03 1998-07-08 Oy Helvar Ballast électronique pour une lampe à décharge, avec mesure de la puissance de la lampe en utilisant un signal à courant continu
EP0853445A1 (fr) * 1997-01-03 1998-07-15 Oy Helvar Ballast électronique réglable et équipé pour mesure la puissance de la lampe
WO1998046049A1 (fr) * 1997-04-08 1998-10-15 Kbl Solarien Ag Procede et circuit pour faire fonctionner un element electrique lumineux
EP1148768A3 (fr) * 2000-04-14 2004-01-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Stabilisation dans le contrôle de lampes à décharge
US7330001B2 (en) 2005-03-22 2008-02-12 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ballast having a dimming device
EP1708549A3 (fr) * 2005-03-22 2007-04-25 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ballast avec dispositif de gradation
US7327099B2 (en) 2005-03-22 2008-02-05 Patent-Treuhand-Gesellschaft für elektrische Glühlamplen mbH Ballast having a dimming device
EP1784062A1 (fr) * 2005-05-10 2007-05-09 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ballast électronique et procédure de réglage
EP2059097A4 (fr) * 2006-08-31 2011-04-20 Panasonic Elec Works Co Ltd Dispositif de commande de lampe à décharge et dispositif d'éclairage
US7973493B2 (en) 2006-08-31 2011-07-05 Panasonic Electric Works Co., Ltd. Discharge lamp lighting device, and illuminating device
DE202009004449U1 (de) 2009-04-02 2009-06-18 Kbl Solarien Ag Ganzkörperbestrahlungsgerät
WO2011070470A1 (fr) * 2009-12-08 2011-06-16 Koninklijke Philips Electronics N.V. Procede et dispositif pour exciter une lampe fluorescente
US8664894B2 (en) 2009-12-08 2014-03-04 Koninklijke Philips N.V. Method and device for driving a fluorescent lamp
DE102010031219A1 (de) * 2010-07-12 2012-01-12 Osram Gesellschaft mit beschränkter Haftung Schaltungsanordnung und Verfahren zum Betreiben mindestens einer Entladungslampe

Also Published As

Publication number Publication date
ES2049790T3 (es) 1994-05-01
ATE102430T1 (de) 1994-03-15
EP0422255B1 (fr) 1994-03-02
JPH07101638B2 (ja) 1995-11-01
DE58907133D1 (de) 1994-04-07
US5066894A (en) 1991-11-19
HK123395A (en) 1995-08-04
JPH03138896A (ja) 1991-06-13

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