EP0824848A1 - Systeme de regulation de puissance d'une lampe a decharge a haute pression a courant alternatif, notamment pour des vehicules a moteur - Google Patents

Systeme de regulation de puissance d'une lampe a decharge a haute pression a courant alternatif, notamment pour des vehicules a moteur

Info

Publication number
EP0824848A1
EP0824848A1 EP97916327A EP97916327A EP0824848A1 EP 0824848 A1 EP0824848 A1 EP 0824848A1 EP 97916327 A EP97916327 A EP 97916327A EP 97916327 A EP97916327 A EP 97916327A EP 0824848 A1 EP0824848 A1 EP 0824848A1
Authority
EP
European Patent Office
Prior art keywords
pressure gas
discharge lamp
gas discharge
power control
supplied
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
EP97916327A
Other languages
German (de)
English (en)
Other versions
EP0824848B1 (fr
Inventor
Ingo Gorille
Bernd Müller
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0824848A1 publication Critical patent/EP0824848A1/fr
Application granted granted Critical
Publication of EP0824848B1 publication Critical patent/EP0824848B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • 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
    • H05B41/3927—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by pulse width modulation
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/02—High frequency starting operation for fluorescent lamp
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/07—Starting and control circuits for gas discharge lamp using transistors

Definitions

  • the invention is based on a power control of an AC high-pressure gas discharge lamp, in particular for motor vehicles, of the type defined in the preamble of claim 1.
  • Bridge circuit in which two controlled switching transistors are arranged in at least one branch, and in which the high-pressure gas discharge lamp is supplied with ignition and combustion energy via the bridge branch of the bridge circuit.
  • the high-pressure gas discharge lamp is located directly in the bridge branch of a bridge circuit designed as a capacitive half-bridge, a choke coil being arranged in series with the lamp. Furthermore, the secondary winding of an ignition transformer is provided in series with this arrangement.
  • the supply current of the lamp and thus the power control is changed by changing the Controlled duty cycle of the switching transistors.
  • the duty cycle is changed in a certain way.
  • the pulse repetition frequency of the AC-type bipolar supply current pulses is, for example, about 300 Hz in the case of sodium vapor lamps, to which a high-frequency voltage between 30 and 70 kHz is superimposed.
  • the start duty cycle is set to about 0.7 and the duty cycle is set to about 0.5.
  • High pressure gas discharge lamps are used or can be used, which can be installed in motor vehicles and which derive from the DC voltage system of low voltage values, e.g. 6 or 12 volts.
  • the power control in this known circuit arrangement works on a different principle and is not as low-loss as necessary.
  • both the start and the operation are carried out in the so-called resonance mode.
  • the starting frequency i.e. when the lamp is ignited, is around 8U kHz and the burning or operating frequency is around 8 to 16 kHz.
  • the lamp is in the so-called wobbling
  • the lamp is ignited by a separate pulse igniter.
  • the lamps used are so-called xenon lamps or metal halide lamps, the high pressure of which is around 80 bar.
  • a high voltage of 24 kv is necessary in view of the worst tolerance conditions. In burning mode, the voltage required is around 85 volts.
  • the basic disadvantages of these two principles are that a relatively large number of components and a special ignition device are also required here, and in addition the components are quite large and have to be resistant to high voltages. This disadvantageously results in relatively high costs, quite high power losses and considerable space requirements.
  • AC-operated high-pressure gas discharge lamp in particular for motor vehicles, with the characterizing features of claim 1, in contrast, has the advantage of simple and inexpensive power control, which is lossless except for the internal switching losses in the switching transistors. This is particularly important in order to avoid operational switching losses in the case of high-frequency operation of the switching transistors, and particularly with regard to use in motor vehicles, in order to conserve the capacity of the battery.
  • this is principally achieved in that the switching transistors switch the current in the form of pulse packets, the individual pulse packets each containing a certain number of high-frequency pulses, the switching being carried out as losslessly as possible in each case in the zero crossings of the current, and in that the regulation for a certain output of the high-pressure gas discharge lamp is maintained by continuous averaging over a predetermined interval of the power packages supplied.
  • the continuous averaging is carried out by incrementally adding or deleting discrete, supplied service packages.
  • the continuous averaging is carried out by incrementally adding or deleting discrete half-waves or pulses within successive supplied pulse packets.
  • the addition or omission of supplied power packs takes place by means of counting the zero crossings of the current via a digital control.
  • the digital control contains tables in which the control and regulation values are contained. This variant of the control is particularly favorable with regard to the use of the power control according to the invention in the motor vehicle, since regulations using tables and counting processes can be made robust and can be easily implemented.
  • switching transistors are used to further reduce the power loss, the extremely short switching times, ie. H. have short rise and fall times, in particular MOSFET transistors.
  • a particularly useful development of the invention provides that it is used in a circuit for operating a high-pressure gas discharge lamp, in which
  • Bridge branch of a bridge circuit the primary winding of a transformer is arranged, a coil in series with this primary winding, and a capacitor is provided in parallel with the primary winding and in series with the coil, whereby a series resonance converter with a primary-side resonant circuit is formed, the high-pressure gas discharge lamp in series with the Secondary winding of the transformer is arranged and by it is supplied with burning energy, and the burning operation is operated at high frequency.
  • Another particularly useful development of the invention provides that it is used in a circuit arrangement for operating a high-pressure gas discharge lamp, in which the primary winding of a transformer is arranged in the bridge branch of a bridge circuit, an oscillating circuit is arranged on the secondary side of the transformer, the high-pressure gas discharge lamp from the secondary side Resonant circuit is supplied with combustion and ignition energy, and both
  • Burning operation as well as the ignition process is operated at high frequency, the frequency of the ignition being selected to be significantly higher than the frequency during the burning operation.
  • Such a circuit arrangement is in the application "circuit arrangement for operating a
  • FIG. 1 schematically shows a block diagram of a first circuit arrangement for operating a high-pressure gas discharge lamp, a capacitive half-bridge being provided in which the power control according to the invention can be used;
  • Fig. 2 schematically shows a block diagram of a second circuit for operating a
  • High-pressure gas discharge lamp a full bridge being provided in which the power control according to the invention can be used;
  • FIG. 3 schematically shows a diagram for defining the performance packages in the performance control according to the invention
  • Fig. 5 shows schematically a diagram showing the case of the power control according to the invention with a decreasing power.
  • a first circuit arrangement for operating and starting a high-pressure gas discharge lamp, in which the power control according to the invention can be used advantageously, is shown on the basis of a schematic block diagram.
  • a high-pressure gas discharge lamp 1 is connected with its electrodes 2 and 3 to the two ends 4 and 5 of the secondary winding 6 of a transformer 7.
  • a capacitor 8 is connected in parallel to the high-pressure gas discharge lamp 1 between the electrodes 2 and 3. The capacitor 8 and the secondary winding 6 of the transformer 7 form one on the secondary side thereof
  • Oscillating circuit through which the high-pressure gas discharge lamp 1 is supplied with combustion and ignition energy.
  • the primary winding 9 of the transformer 7 lies in the bridge branch of a bridge circuit 10.
  • the bridge circuit 10 shown is a so-called capacitive half bridge, in which two controlled switching transistors 11 are located in one branch, here in the left one and 12 are arranged.
  • the connection point 13 of the two transistors 11 and 12 forms one connection of the bridge branch.
  • two capacitors 14 and 15 are arranged in the other branch, here in the right.
  • the connection point 16 of the two capacitors 14 and 15 forms the second connection of the bridge branch.
  • the aforementioned primary winding 9 of the transformer 7 is located between the connections 13 and 16.
  • the switching transistor 11 and the capacitor 14 are connected to one another at the connection 17 and connected to the positive pole + of a supply voltage source, for example the battery of a motor vehicle.
  • Switching transistor 12 and capacitor 15 are connected to one another at connection 18 and connected to earth potential 0 of the supply voltage source.
  • a microcontroller 19 has its connections 20 and 21 connected to the positive pole + or the ground potential 0 of the supply voltage U B. Control outputs 22 and 23 of the microcontroller 19 are routed to the control inputs of the associated controlled switching transistors 11 and 12, respectively.
  • a transverse capacitor 24 is provided to avoid high-frequency interference in the vehicle electrical system via the connections + and 0.
  • FIG. 2 shows a second circuit in which the power control according to the invention can advantageously be used.
  • the so-called full-bridge circuit 210 shown in the exemplary embodiment in FIG. 2 contains two switching transistors 212 and 211 instead of the two bridge capacitors 14 and 15.
  • Control lines 222 and 223 of the microcontroller 19 are routed to the control inputs of the switching transistors 11 and 211 or 12 and 212 to make them cross-conductive or blocking.
  • this exemplary embodiment corresponds to that shown in FIG. 1 and described above.
  • a sensing line 119 for the current in the switching transistor 11 is provided between the switching transistor 11 and the microcontroller 19 and a sensing line 129 for the current in the switching transistor 12 between the switching transistor 12 and the microcontroller 19.
  • the zero current crossing in the switching transistors is determined via these sensing lines.
  • the power of the high-pressure gas discharge lamp 1 is advantageously regulated by means of pulse packet control in accordance with the power control according to the invention.
  • the change in power is effected by changing the number of discrete pulses contained in the respective pulse packet.
  • the switching of the switching transistors 11 and 12 or 11 with 211 and 12 with 212 corresponds to the respective scope or the respective size of the pulse packets.
  • the switching of the current through the switching transistors is carried out at the zero crossing of the current. These zero crossings of the current are determined on the sensing lines 119 and 129 of the microcontroller 19.
  • the current curve is plotted over the time axis t using curve 31 to define the power packages, namely in a standardized manner I / Im, in which the current I is related to the maximum current Im.
  • Curve 32 shows the squared current and thus the power.
  • the numbers and the associated division on the time axis t mean the number of half-waves of the high-frequency pulses contained in pulse packets.
  • the instantaneous power in the decay case is basically as shown in the diagram in FIG. 3 as an example. If what is provided according to the invention is only switched at the zero crossing of the current, energy or power packs 33, 34, 35, 36 of different sizes result, which show the respective shaded areas between the time axis t and below the positive arc of the power curve 32 correspond. In the example of decaying performance, that is to say in the event of a decay, the service packages 33, 34, 35, 36 increasingly decrease in size.
  • the numbers 0 to 80 entered on the time axis t represent the number of half oscillations.
  • the power control according to the invention provides for averaging over a plurality of power packs in order to regulate the power to a specific desired value, for example to an average value of 35 W in FIGS. 4 and 5.
  • a specific desired value for example to an average value of 35 W in FIGS. 4 and 5.
  • the individual service packages have slightly different sizes, but provide the desired service in the averaging.
  • the advantage lies in the fact that they are not equally large, but clearly calculable power packages.
  • the regulation to a specific target value is accomplished by the continuous averaging over a predetermined interval by incremental addition or omission of discrete service packages.
  • FIG. 4 a diagram is used to explain the area in which the interval can be located if it is a matter of rising power.
  • the number of half-vibrations that can be contained in pulse packets are plotted on the horizontal axis.
  • the power P in W and the time t in ⁇ s are plotted on the vertical axis.
  • the curve 41, linearly increasing in steps, indicates the course of time.
  • Curve 42 represents the maximum performance and curve 43 represents the packet performance.
  • Performance can be regulated is particularly marked.
  • 44 takes place in a certain interval continuous averaging takes place.
  • the service packages contain between 13 and 23 half-waves.
  • Another example with a narrower interval 45 is shown. At this interval 45, the number of half-vibrations contained in the service packages lies between 15 and 20.
  • the individual service packages with the corresponding discrete numbers of half-vibrations are represented by crosses, the respective associated package performance can be seen on the vertical axis.
  • FIG. 5 a diagram is used to explain the area in which the interval can be located when it is a question of declining power.
  • the number of ⁇ half-vibrations that can be contained in pulse packets are plotted on the horizontal axis.
  • the power P in W and the time t in ⁇ s are plotted on the vertical axis.
  • the curve 51 increasing linearly in steps, indicates the course of time.
  • Curve 52 represents the decaying maximum power and curve 53 represents the packet power.
  • a possible setpoint of 35 W, to which the power can be adjusted, is specially marked. In order to achieve this target value, the continuous averaging takes place in a certain interval 54.
  • the individual service packages contain between 5 and 10 half-waves.
  • the individual service packages with the corresponding discrete numbers of half oscillations are represented by crosses, the respective package service can be found on the vertical axis.
  • the possible size of the interval 44 or 45 or 54, in which the continuous averaging takes place, depends in particular on the quality of the circuit in which the control according to the invention is used. In the case of higher goods, there is a better possibility of regulation.
  • the power control according to the invention can be implemented in a robust design and simple implementation by counting the zero crossings of the current and using tables carry out stored control and regulation values of a digital control.
  • a digital control can be provided, for example, in the microcontroller 19 of the examples of use shown in FIGS. 1 and 2.
  • Such transistors can in particular be MOSFET transistors.
  • the power control according to the invention enables simple and inexpensive, very low-loss control of the power of a high-frequency circuit. Applied to the power control of a high-pressure gas discharge lamp, especially one that is installed in a motor vehicle, this leads to a very cost-effective solution that is gentle on the battery.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

Ce système de régulation de puissance d'une lampe à décharge à haute pression à courant alternatif, utilisée notamment dans un véhicule à moteur, contient un circuit en pont. Deux transistors de commutation commandés sont montés dans au moins une branche du circuit, et la lampe à décharge à haute pression est alimentée en énergie d'amorçage et de décharge au moyen d'une branche du circuit en pont. Selon l'invention, il est prévu que les transistors de commutation commutent le courant sous forme de paquets d'impulsions contenant chacun un nombre déterminé d'impulsions haute fréquence. La commutation est réalisée avec un minimum de perte lors des passages du courant par zéro, et la régulation destinée à maintenir une puissance déterminée de la lampe à décharge à haute pression s'effectue par la formation en continu d'une moyenne sur un intervalle prédéterminé (44, 45) du paquet de puissance acheminé.
EP97916327A 1996-03-06 1997-03-05 Systeme de regulation de puissance d'une lampe a decharge a haute pression a courant alternatif, notamment pour des vehicules a moteur Expired - Lifetime EP0824848B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19608655A DE19608655A1 (de) 1996-03-06 1996-03-06 Leistungssteuerung einer mit Wechselstrom betriebenen Hochdruckgasentladungslampe, insbesondere für Kraftfahrzeuge
DE19608655 1996-03-06
PCT/DE1997/000421 WO1997033453A1 (fr) 1996-03-06 1997-03-05 Systeme de regulation de puissance d'une lampe a decharge a haute pression a courant alternatif, notamment pour des vehicules a moteur

Publications (2)

Publication Number Publication Date
EP0824848A1 true EP0824848A1 (fr) 1998-02-25
EP0824848B1 EP0824848B1 (fr) 2001-08-08

Family

ID=7787392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97916327A Expired - Lifetime EP0824848B1 (fr) 1996-03-06 1997-03-05 Systeme de regulation de puissance d'une lampe a decharge a haute pression a courant alternatif, notamment pour des vehicules a moteur

Country Status (6)

Country Link
US (1) US5945787A (fr)
EP (1) EP0824848B1 (fr)
JP (1) JPH11504759A (fr)
DE (2) DE19608655A1 (fr)
ES (1) ES2161454T3 (fr)
WO (1) WO1997033453A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10238833A1 (de) * 2002-08-23 2004-03-11 Ivoclar Vivadent Ag Dentalprothese mit metallfreien Verankerungselementen

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO322474B1 (no) * 2003-10-21 2006-10-09 Fontenoy Philippe Lysrorarmatur samt fremgangsmate for drift av lysror i slik armatur
EP1986475B1 (fr) 2005-03-22 2010-02-03 Lightech Electronics Industries Ltd. Circuit d'allumage pour une lampe DHI
JP5464521B2 (ja) * 2010-07-20 2014-04-09 株式会社東通研 誘導放電限界回路を用いた安定器

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104264A1 (fr) * 1982-09-24 1984-04-04 White Castle System, Inc. Source de courant réglable pour lampes à décharge de gaz et pour lampes analogues
DE3312574A1 (de) * 1983-04-08 1984-10-18 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg Elektronisches vorschaltgeraet fuer leuchtstofflampen
DE3729383A1 (de) * 1987-09-03 1989-03-16 Philips Patentverwaltung Schaltungsanordnung zum starten einer hochdruckgasentladungslampe
US4904905A (en) * 1988-08-05 1990-02-27 American Sterilizer Company Dual resonant frequency arc lamp power supply
US5130610A (en) * 1990-01-31 1992-07-14 Toshiba Lighting & Technology Corporation Discharge lamp lighting apparatus
EP0477587A1 (fr) * 1990-09-05 1992-04-01 Matsushita Electric Industrial Co., Ltd. Appareil d'alimentation
DE4222634A1 (de) * 1992-07-10 1994-01-13 Vdo Schindling Verfahren und Schaltungsanordnung zum Betrieb einer Leuchtstofflampe
US5349273A (en) * 1992-11-23 1994-09-20 Everbrite, Inc. Dimmer and ground fault interruption for solid state neon supply
DE4301276A1 (de) * 1993-01-19 1994-07-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren und Stromversorgungseinheit zum stabilisierten Betrieb einer Natrium-Hochdruckentladungslampe
DE4314584A1 (de) * 1993-04-29 1994-11-03 Priamos Licht Ind & Dienstleis Steueranordnung für den Impulsbetrieb von Entladungslampen
DE4413826A1 (de) * 1994-04-20 1995-10-26 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Steuerschaltungsanordnung für eine Leistungsschaltungsanordnung zum gepulsten Betrieb einer Entladungslampe
DE9408734U1 (de) * 1994-05-27 1994-09-01 Bischl, Johann, 82418 Seehausen Hochspannungs-Versorgungsschaltung für eine Gasentladungslampe
JP3315008B2 (ja) * 1994-06-28 2002-08-19 松下電工株式会社 放電灯点灯装置
US5677602A (en) * 1995-05-26 1997-10-14 Paul; Jon D. High efficiency electronic ballast for high intensity discharge lamps

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9733453A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10238833A1 (de) * 2002-08-23 2004-03-11 Ivoclar Vivadent Ag Dentalprothese mit metallfreien Verankerungselementen
DE10238833B4 (de) * 2002-08-23 2005-09-29 Ivoclar Vivadent Ag Dentalprothese mit metallfreien Verankerungselementen

Also Published As

Publication number Publication date
WO1997033453A1 (fr) 1997-09-12
ES2161454T3 (es) 2001-12-01
US5945787A (en) 1999-08-31
DE59704229D1 (de) 2001-09-13
JPH11504759A (ja) 1999-04-27
EP0824848B1 (fr) 2001-08-08
DE19608655A1 (de) 1997-09-11

Similar Documents

Publication Publication Date Title
EP0347427B1 (fr) Circuit pour faire fonctionner une lampe luminescente a gaz sur une source de courant continu
EP0927506B1 (fr) Systeme d'eclairage comprenant une lampe a decharge a barriere dielectrique et un circuit pour produire des sequences d'impulsions
EP0781077A2 (fr) Circuit pour alimenter une lampe
EP0781078A2 (fr) Circuit pour alimenter des lampes à barrière diélectrique par impulsions
DE3886000T2 (de) Elektrische Anordnung zum Zünden und Speisen einer Gasenladungslampe.
DE19843643B4 (de) Schaltungsanordnung zum Starten und Betreiben einer Hochdruck-Entladungslampe
EP0868115B1 (fr) Circuit d'amorçage pour lampe HID
DE112006001948B4 (de) DC/DC-Umrichtervorrichtung und Entladelampen-Leuchtvorrichtung
EP1108347A2 (fr) Ballast electronique pour lampe a decharges dielectriquement empechees
EP3376659A1 (fr) Source de courant de soudage
EP0740494A2 (fr) Circuit de fonctionnement impulsionnel de lampes à décharge
EP1110434B1 (fr) Ballast electronique pour lampe a decharges dielectriquement empechees
WO1992010920A1 (fr) Circuit de fonctionnement impulsionnel de lampes a decharge haute pression
EP1869951A1 (fr) Dispositif d'amorçage a transformateur piezoelectrique pour une lampe a decharge a haute pression
EP0824848A1 (fr) Systeme de regulation de puissance d'une lampe a decharge a haute pression a courant alternatif, notamment pour des vehicules a moteur
DE3400580C3 (de) Wechselspannungsgespeiste Gleichstromquelle mit nachgeschaltetem Wechselrichter
EP0846406A1 (fr) Circuit pour actionner une lampe a decharge de gaz haute pression avec du courant alternatif
DE102005034505A1 (de) Schaltungsanorndung mit transformatorlosem Wandler mit Drossel für den gepulsten Betrieb von dielektrischen Barriere-Entladungslampen
DE69624970T2 (de) Schaltung zum Betreiben von Gasentladungslampen
DE19737662A1 (de) Wechselspannungsgenerator zur Steuerung eines Plasma-Wiedergabeschirms
EP0794695B1 (fr) Circuit pour alimenter une lampe à décharge à hautepression
EP0794694B1 (fr) Circuit pour alimenter une lampe à haute pression
DE19608658C1 (de) Schaltungsanordnung zum Zünden und Betreiben einer Hochdruckgasentladungslampe
EP2389047B1 (fr) Agencement de commutation et procédé pour le fonctionnement efficace d'une charge capacitive
EP0596152A1 (fr) Ballast à courant alternatif pour lampes à décharge

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT SE

17P Request for examination filed

Effective date: 19980312

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20000911

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RIC1 Information provided on ipc code assigned before grant

Free format text: 7H 05B 41/282 A

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

REF Corresponds to:

Ref document number: 59704229

Country of ref document: DE

Date of ref document: 20010913

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20011106

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2161454

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20050223

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20050318

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20050323

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20050413

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050513

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060305

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060306

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060306

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060331

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061003

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060305

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20061130

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20060306

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070305