EP0489747B1 - Agencement de circuit pour le fonctionnement d'une lampe a decharge gazeuse - Google Patents

Agencement de circuit pour le fonctionnement d'une lampe a decharge gazeuse Download PDF

Info

Publication number
EP0489747B1
EP0489747B1 EP90911282A EP90911282A EP0489747B1 EP 0489747 B1 EP0489747 B1 EP 0489747B1 EP 90911282 A EP90911282 A EP 90911282A EP 90911282 A EP90911282 A EP 90911282A EP 0489747 B1 EP0489747 B1 EP 0489747B1
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
voltage
gas discharge
ignition
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.)
Expired - Lifetime
Application number
EP90911282A
Other languages
German (de)
English (en)
Other versions
EP0489747A1 (fr
Inventor
Lothar Gademann
Ulrich Drews
Wolfgang Jacob
Anton Mindl
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 EP0489747A1 publication Critical patent/EP0489747A1/fr
Application granted granted Critical
Publication of EP0489747B1 publication Critical patent/EP0489747B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices
    • 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
    • H05B41/02—Details
    • H05B41/04—Starting switches

Definitions

  • the invention relates to a circuit arrangement for operating a gas discharge lamp according to the preamble of the independent claim.
  • an ignition circuit for a high pressure metal vapor discharge lamp is known, in which an LC series resonant circuit acts on the switchable primary winding of a transformer. The high voltage induced in the secondary winding ignites the gas discharge lamp.
  • the secondary winding of the transformer remains part of the lighting circuit after the gas discharge lamp has been ignited.
  • the ignition circuit is constantly thermally stressed by the additional losses that occur.
  • the rate of rise of the ignition voltage which should have high values in particular for igniting warm, high-pressure gas discharge lamps, is limited in the known ignition circuit by the components contained in the lighting circuit of the gas discharge lamp.
  • circuits for operating gas discharge lamps which have an ignition circuit.
  • a separation of the ignition circuit from the gas discharge lamp as a function of the voltage generated in the ignition circuit is not provided in the previously known circuit arrangements.
  • the connection, shown in WO-A 82/01113, of a secondary winding of an ignition transformer by means of a diode to the gas discharge lamp causes decoupling only under certain potential conditions. Accordingly, a direct voltage operation of the gas discharge lamp is in the Known circuit arrangement provided. In the event of an electrical vibration occurring in the secondary winding, only negative signal components are kept away from the gas discharge lamp.
  • the circuit arrangement according to the invention with the characterizing features of the main claim has the advantage over the fact that the transformer is only actively connected to the gas discharge lamp during the ignition phase, so that the power loss of the circuit arrangement is very low.
  • the rate of rise of the ignition voltage pulses is very high.
  • the ignition energy stored in the transformer can be used for igniting the gas discharge lamp with almost no loss, so that in particular a warm gas discharge lamp can also be ignited safely.
  • breakover diode is used as the semiconductor switch, which has a high reverse voltage and only becomes conductive when the high ignition voltage is reached.
  • Such breakover diodes have a low residual current in the blocked state and are very low-resistance when they break into the conductive state.
  • Another advantage is that the ignition is monitored by means of a light sensor. As long as the lamp is not on, the light sensor controls the control circuit to generate new ignition pulses. After the gas discharge lamp has been ignited, the light sensor suppresses the generation of further ignition pulses.
  • the signal from the light sensor can advantageously be used to monitor the lamp circuit, regulate the lamp power or the light intensity or to switch off the high voltage. This is particularly advantageous for safety reasons when changing the lamp.
  • Another advantage is the fact that the ignition coil of the motor vehicle engine is used instead of the transformer. As a result, existing components are used several times, so that the construction of the circuit is very inexpensive.
  • the use of a gas discharge lamp in a motor vehicle headlight is also favorable. Since the ignition is guaranteed even when the lamp is warm, the lamp can also be used as a flasher.
  • a particularly simple circuit arrangement results if a second generator is used instead of the transformer.
  • FIG. 1 shows a first embodiment
  • FIG. 2 shows a second embodiment
  • FIG. 3 shows a third embodiment
  • FIG. 4 shows a fourth embodiment.
  • a gas discharge lamp 1 is connected to the voltage output of an AC voltage generator 2 via the series connection of a ballast 4 and a capacitor 3, the firing circuit 10 of the circuit arrangement.
  • the alternating voltage generator 2 is connected with its second output to the second electrode of the gas discharge lamp 1, which is continued as a ground line.
  • a series circuit is arranged in parallel with the gas discharge lamp 1 and has a voltage-controlled switch 5, the secondary winding 12 of a transformer 7 and a controlled switch 9.
  • the primary winding 11 of the transformer 7 is connected by its one connection to the switched side of the secondary winding and by its second connection to a first output 13 of a control circuit 6.
  • the control circuit 6 has a second output 14, which is led to the control input of the controlled switch 9, which is expediently designed as a semiconductor switch is.
  • the control circuit 6 is controlled by a light sensor 8, the arrangement of which is selected such that it can detect the ignition of the gas discharge lamp 1. This circuit part is referred to as the pulse ignition part.
  • the voltage supply to the light sensor 8, the control circuit 6 and the generator 2 takes place via common lines which are formed by the connections 15 and 16.
  • the circuit arrangement essentially has two circuits for the operation of the gas discharge lamp.
  • the first circuit is formed by the generator 2, the capacitor 3 and the ballast 4 in connection with the gas discharge lamp 1.
  • the generator 2 supplies the operating voltage necessary to maintain the burning operation of the gas discharge lamp 1.
  • the necessary operating voltage is e.g. 60 to 120 volts.
  • the operating frequency of the generator 2 is advantageously in the kilo-Hz range, because this makes the components and the generator smaller and less expensive to manufacture and, in addition, the luminous efficacy of the gas discharge lamp is particularly high in this frequency range.
  • the lamp is connected in parallel to an ignition circuit which essentially has the voltage-controlled switch 5, the transformer 7 and the controlled switch 9 Monitoring of the burning function is provided by the control circuit 6, which can be activated via the light sensor 8.
  • the control circuit 6 contains switching elements, clock generators, the voltage supply for the transformer and monitoring elements for monitoring the function of the gas discharge lamp and safety functions.
  • the switch 9 is first closed, so that the primary winding 11 of the transformer 7 can charge via the first output of the control circuit 6. After charging, the switch 9 is opened so that a voltage is induced in the secondary winding 12. With a suitable transmission ratio of the two windings, the induced voltage for igniting the gas discharge lamp 1 is sufficiently high.
  • the voltage-controlled switch 5 is initially blocked when the voltage is low. If the induced voltage rises above the threshold value of the switch 2, then it becomes practically abruptly conductive, so that a high voltage amplitude is available at the combustion electrodes for igniting the gas discharge lamp.
  • a breakover diode was used as the voltage-controlled switch 5.
  • Toggle diodes have the advantage that they are very high-resistance below their threshold voltage, which is adapted to the ignition voltage requirement of the lamp and is, for example, 20,000 volts, so that the losses caused by leakage currents are very low. If the threshold voltage is exceeded, the breakover diode becomes very low-resistance so that it can transmit the energy stored in the transformer 7 to the gas discharge lamp 1. Here, the gas discharge lamp 1 is decoupled from the AC generator 2 and capacitor 3 by the ballast 4.
  • the capacitor 3 is provided to support the ignition process in the combustion circuit. Since the capacitor 3 is further charged with each unsuccessful attempt to ignite, it can also transfer its energy to the hot electrode of the gas discharge lamp via the ballast during the ignition process and support the successful last attempt to ignite. In particular in the case of a warm gas discharge lamp, this also supports safe ignition and promotes the coupling of the lighting circuit.
  • the generator 2 can also be followed by a diode 42, of which a capacitor 41 can be connected to a connecting terminal 15, 16, preferably to ground (see FIG. 4).
  • the ignition circuit was dimensioned in such a way that a single ignition pulse has about a few microseconds. If this pulse was not sufficient to ignite the lamp, then further ignition pulses are generated, with the voltage at the capacitor 3 and at the gas discharge lamp 1 continuously increasing with each ignition pulse.
  • the charging voltage of the capacitor 3 is determined by the ignition energy transmitted by the voltage-controlled switch 5 during the ignition process. The charging voltage of the capacitor 3 is increased continuously since the capacitor was not discharged if the ignition attempt was unsuccessful.
  • the control circuit 6 keeps the switch 9 open, so that the primary winding 11 of the transformer 7 is prevented from being recharged.
  • the voltage-controlled switch 5 returns, as after each ignition pulse, to its high-resistance state and thus decouples the ignition circuit from the gas discharge lamp 1.
  • the combustion mode is now maintained by the generator 2.
  • the ballast 4, in conjunction with the capacitor 3, limits the current, since the gas discharge lamp 1 has a low resistance during the burning process.
  • a resonance tuning between the capacitor 3 and the ballast 4, which is necessary in known ignition circuits, is not necessary here.
  • ignition coils or corresponding transformers of a motor vehicle engine can also be provided.
  • Photo transistors or photo resistors can be used as light sensor 8. They recognize the optical radiation of the gas discharge lamp 1 and emit a corresponding electrical signal which can be used to control the control circuit 6.
  • the control circuit 6 also has switching devices, for example comparators for current measurement, which prevent unwanted ignition in the event of a missing gas discharge lamp 1 or a short circuit in the lines. This is for security reasons required if this circuit arrangement is used to operate the headlight of a motor vehicle.
  • control circuit 6 can regulate the combustion current of the gas discharge lamp in a light-dependent manner.
  • a thyristor or a spark gap can also be used as a voltage-controlled switch.
  • spark gaps have the disadvantage that they emit high levels of interference, which may be undesirable, and they are also subject to wear.
  • the use of a breakover diode has the advantage that when the breakover voltage is reached, the breakover diode is sufficiently fast, i.e. changes to the conductive state within a few nanoseconds.
  • breakover diodes have already been proposed in patent application EP 88/00456.
  • FIG. 2 A second exemplary embodiment of the circuit arrangement is shown in FIG. 2.
  • the control of the transformer 7 is changed here.
  • the primary winding 11 of the transformer 7 is preceded by a second capacitor 20 which is charged via a diode 21 from the output 13 of the control circuit 6.
  • a switch 9 is connected to ground between the capacitor 20 and the diode 21. After the capacitor 20 has been charged, this switch 9 is closed via the output 14 of the control circuit 6, as a result of which the ignition voltage is induced in the secondary winding 12 of the transformer 7. After reaching the breakover voltage, the voltage-controlled switch 5 becomes conductive and very quickly transmits the energy stored in the transformer 7 to the gas discharge lamp 1.
  • the circuit arrangement is dimensioned such that the capacitor 3 can receive several charging pulses until the ignition voltage for the gas discharge lamp 1 is reached. After the ignition, the generator 2 takes over the energy supply for the Gas discharge lamp 1 while the transformer 7 remains switched off.
  • a high-voltage generator 30 for example an ignition transformer, which charges a capacitor 32 which can be connected in parallel to the gas discharge lamp 1 via the voltage-controlled switch 5 via a diode 31.
  • the energy stored in the capacitor 32 switches through the controllable switch 5 for igniting the gas discharge lamp 1 when the breakover voltage is reached.
  • this circuit arrangement works like the previously described exemplary embodiments.
  • the proposed exemplary embodiments can also be operated on a DC voltage network if the available DC voltage, for example from the battery of a motor vehicle, is clocked to generate a pulsed high voltage.
  • a DC voltage network if the available DC voltage, for example from the battery of a motor vehicle, is clocked to generate a pulsed high voltage.
  • Such chopper circuits are known and need not be described in detail.
  • the generator 2 can be replaced by a battery.
  • the capacitor 3 is to be replaced by a capacitor connected to ground.

Landscapes

  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

Il est proposé un agencement de circuit pour le fonctionnement d'une lampe à décharge gazeuse (1), où la haute tension pour l'allumage de la lampe à décharge est engendrée au moyen de l'énergie accumulée dans un transformateur (7) ou condensateur. Afin d'obtenir un fort accroissement de la tension d'amorçage, celle-ci est transmise sur la lampe à décharge par l'intermédiaire d'un interrupteur commandé en tension (5). L'interrupteur commandé en tension (5) proposé est une diode basculante ayant des temps de commutation très courts. Après l'allumage, le circuit d'amorçage est coupé. Cet agencement de circuit convient également en particulier à l'allumage de lampes à décharge chaudes par le fonctionnement. C'est pourquoi il convient en particulier aux phares de véhicules automobiles.

Claims (9)

  1. Circuit de fonctionnement d'une lampe à décharge de gaz (1) comprenant un générateur de tension (2) avec une inductance (4) comme appareil intermédiaire, un circuit de commande (6) pour la phase d'allumage de la lampe à décharge de gaz (1), caractérisé en ce que le circuit de commande (6) peut être relié à la lampe à décharge de gaz (1) par l'intermédiaire d'un commutateur (5) commandé en tension.
  2. Circuit selon la revendication 1, caractérisé en ce qu'un transformateur d'allumage (7) associé au circuit de commande (6) comporte un primaire (11) et un enroulement secondaire (12), l'enroulement secondaire (12) pouvant être relié à la lampe à décharge de gaz (1) par le commutateur (5) commandé en tension.
  3. Circuit selon la revendication 1, caractérisé en ce que le circuit de commande (6) comporte un générateur (30) chargeant un condensateur (32) qui peut être relié à la lampe à décharge de gaz (1) par l'intermédiaire du commutateur (5) commandé en tension.
  4. Circuit selon la revendication 2, caractérisé en ce que le transformateur (7) est un transformateur de démarrage dont l'enroulement primaire (11) est relié par un second condensateur (20).
  5. Circuit selon la revendication 2, caractérisé en ce que le transformateur (7) est une bobine d'allumage.
  6. Circuit selon la revendication 1, caractérisé en ce que le commutateur (5) commandé en tension est un semi-conducteur de commutation de préférence une diode de basculement.
  7. Circuit selon l'une des revendications précédentes, caractérisé par un photocapteur (8) qui détecte la lumière émise par la lampe à décharge (1) et qui lorsque la lampe à décharge de gaz (1) est allumée, agit sur le circuit de commande (6) pour terminer la phase de charge.
  8. Circuit selon l'une des revendications précédentes, caractérisé en ce que le circuit de commande (6) interrompt la phase de charge lorsque la lampe à décharge de gaz (1) n'est pas montée ou qu'il y a un court-circuit.
  9. Circuit selon l'une des revendications précédentes, caractérisé dans son application à un projecteur de véhicule automobile.
EP90911282A 1989-09-01 1990-08-04 Agencement de circuit pour le fonctionnement d'une lampe a decharge gazeuse Expired - Lifetime EP0489747B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3929029 1989-09-01
DE3929029A DE3929029A1 (de) 1989-09-01 1989-09-01 Schaltungsanordnung zum betrieb einer gasentladungslampe
PCT/DE1990/000600 WO1991003919A1 (fr) 1989-09-01 1990-08-04 Agencement de circuit pour le fonctionnement d'une lampe a decharge gazeuse

Publications (2)

Publication Number Publication Date
EP0489747A1 EP0489747A1 (fr) 1992-06-17
EP0489747B1 true EP0489747B1 (fr) 1995-11-08

Family

ID=6388408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90911282A Expired - Lifetime EP0489747B1 (fr) 1989-09-01 1990-08-04 Agencement de circuit pour le fonctionnement d'une lampe a decharge gazeuse

Country Status (10)

Country Link
US (1) US5367227A (fr)
EP (1) EP0489747B1 (fr)
JP (1) JPH05500727A (fr)
KR (1) KR920704546A (fr)
AU (1) AU630487B2 (fr)
BR (1) BR9007620A (fr)
CZ (1) CZ281990B6 (fr)
DE (2) DE3929029A1 (fr)
ES (1) ES2080150T3 (fr)
WO (1) WO1991003919A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4117288A1 (de) * 1991-05-27 1992-12-03 Hella Kg Hueck & Co Hochspannungs-zuenduebertrager zum zuenden und betreiben von wechselstrom-hochdruck-gasentladungslampen in kraftfahrzeugen
DE4117589A1 (de) * 1991-05-29 1992-12-03 Hella Kg Hueck & Co Vorschaltgeraet fuer hochdruck-gasentladungslampen in kraftfahrzeugen
DE4127970C1 (fr) * 1991-08-23 1992-10-01 Robert Bosch Gmbh, 7000 Stuttgart, De
ITVR940055U1 (it) * 1994-09-14 1996-03-14 Apparecchiatura per lampade a scarica, con accensione e riaccensione istantanea con lampada calda, particolarmente per lampade illuminazio
US5449980A (en) * 1994-09-15 1995-09-12 General Electric Company Boosting of lamp-driving voltage during hot restrike
IL121819A (en) * 1997-09-22 2003-12-10 Elop Electrooptics Ind Ltd Circuit arrangement for igniting gas discharge flash tubes
DE10246011A1 (de) * 2002-10-02 2004-04-15 Chin-Fa Yen HID-Lichtemissionseinzelpunktleuchtrohr- Schaltvorrichtung das Verfahren derselben
NO20053519L (no) * 2005-07-18 2007-01-19 Thia Medica As Anvendelse av forbindelser som omfatter fettsyrer
US7456583B2 (en) * 2006-09-05 2008-11-25 General Electric Company Electrical circuit with dual stage resonant circuit for igniting a gas discharge lamp
US7460379B2 (en) * 2006-09-05 2008-12-02 General Electric Company Electrical circuit with voltage multiplier for facilitating ignition of a gas discharge lamp
DE102008004787A1 (de) * 2008-01-17 2009-07-23 Bag Electronics Gmbh Zündgerät mit zwei Eingangspolen
US9544970B2 (en) * 2012-12-21 2017-01-10 Tridonic Gmbh & Co Kg Detection of an LED module
DE102016120672B4 (de) * 2016-10-28 2018-07-19 Heraeus Noblelight Gmbh Lampensystem mit einer Gasentladungslampe und dafür angepasstes Betriebsverfahren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092565A (en) * 1976-11-22 1978-05-30 General Electric Company Pulse circuit for gaseous discharge lamps
AT369609B (de) * 1980-09-11 1983-01-25 Elger Elektro Neon Schaltungsanordnung fuer den betrieb von gasentladungslampen
US4890041A (en) * 1988-03-10 1989-12-26 Hubbell Incorporated High wattage HID lamp circuit
US5021716A (en) * 1990-05-18 1991-06-04 Gte Products Corporation Forward inverter ballast circuit

Also Published As

Publication number Publication date
AU6052890A (en) 1991-04-08
EP0489747A1 (fr) 1992-06-17
DE59009861D1 (de) 1995-12-14
BR9007620A (pt) 1992-07-07
AU630487B2 (en) 1992-10-29
US5367227A (en) 1994-11-22
WO1991003919A1 (fr) 1991-03-21
CZ281990B6 (cs) 1997-04-16
KR920704546A (ko) 1992-12-19
JPH05500727A (ja) 1993-02-12
CS407490A3 (en) 1992-01-15
DE3929029A1 (de) 1991-03-07
ES2080150T3 (es) 1996-02-01

Similar Documents

Publication Publication Date Title
DE3108547C2 (fr)
EP0489747B1 (fr) Agencement de circuit pour le fonctionnement d'une lampe a decharge gazeuse
DE3811194A1 (de) Festkoerper-betriebsschaltung fuer eine gleichstrom-entladungslampe
WO2012130649A1 (fr) Procédé et dispositif de prolongement de la durée de combustion d'une étincelle allumée par une bougie d'allumage dans un moteur à combustion interne
DE2628509C2 (de) Kapazitätsentladungs-Zündsystem
DE3108548A1 (de) "zuendschaltung fuer eine hochdruckmetalldampfentladungslampe"
EP0868115A2 (fr) Circuit d'amorçage pour lampe HID
DE1908091B2 (de) Zuendschaltung fuer das zuendsystem von brennkraftmaschinen
EP1054579A2 (fr) Circuit, système électrique associé ainsi que lampe à décharge avec un tel circuit et son procédé d'alimentation
EP1058488B1 (fr) Circuit d'allumage pour lampe
DE2145089C3 (de) Kondensatorzündanlage für Brennkraftmaschinen
US5621278A (en) Ignition apparatus
DE19838051A1 (de) Elektronische Schaltung zur Pulserzeugung
EP1086609B1 (fr) Allumeur pour lampe luminescente a gaz, notamment lampe luminescente a gaz haute pression pour phare de vehicule automobile
EP1924770A1 (fr) Procede et dispositif pour enflammer un melange gazeux combustible dans un moteur a combustion
EP1869954A1 (fr) Dispositif pour faire fonctionner ou allumer une lampe a decharge a haute pression, culot de lampe et systeme d'eclairage presentant un tel dispositif et procede pour faire fonctionner une lampe a decharge a haute pression
EP1056314B1 (fr) Circuit pour alimenter en courant alternatif des lampes à décharge pour un véhicule
DE1751892C3 (de) Elektrische Impulserzeugungseinrichtung
DE19608658C1 (de) Schaltungsanordnung zum Zünden und Betreiben einer Hochdruckgasentladungslampe
DE10231511A1 (de) Zündspulensystem mit wenigstens zwei induktiven Spulen
EP3436687B1 (fr) Méthode pour exploiter un système d'allumage pourvu d'un convertisseur élevateur
DE1539228C3 (fr)
EP1679942B1 (fr) Circuit d'allumage pour une lampe à décharge
DE2339783C3 (de) Zündvorrichtung für Brennkraftmaschinen
DE1199399B (de) Schaltungsanordnung zum starterlosen Zuenden von Gasentladungslampen

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

17P Request for examination filed

Effective date: 19920203

AK Designated contracting states

Kind code of ref document: A1

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

17Q First examination report despatched

Effective date: 19941115

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59009861

Country of ref document: DE

Date of ref document: 19951214

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2080150

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960112

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: SCINTILLA AG, DIREKTION

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

Ref country code: GB

Payment date: 19960722

Year of fee payment: 7

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

Ref country code: FR

Payment date: 19960814

Year of fee payment: 7

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

Ref country code: CH

Payment date: 19960823

Year of fee payment: 7

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

Ref country code: ES

Payment date: 19960830

Year of fee payment: 7

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
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: 19970804

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 19970805

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

Ref country code: LI

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

Effective date: 19970831

Ref country code: CH

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

Effective date: 19970831

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970804

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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: 19980430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: SE

Payment date: 19980824

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: 19981030

Year of fee payment: 9

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

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990830

EUG Se: european patent has lapsed

Ref document number: 90911282.3

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: 20000601

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20001009

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;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050804