DE59606813D1 - Method for switching off a circuit arrangement for operating a discharge lamp - Google Patents

Method for switching off a circuit arrangement for operating a discharge lamp

Info

Publication number
DE59606813D1
DE59606813D1 DE59606813T DE59606813T DE59606813D1 DE 59606813 D1 DE59606813 D1 DE 59606813D1 DE 59606813 T DE59606813 T DE 59606813T DE 59606813 T DE59606813 T DE 59606813T DE 59606813 D1 DE59606813 D1 DE 59606813D1
Authority
DE
Germany
Prior art keywords
switching
operating
discharge lamp
circuit arrangement
generator
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
DE59606813T
Other languages
German (de)
Inventor
Arnulf Rupp
Dr Loehmann
Alwin Veser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Application granted granted Critical
Publication of DE59606813D1 publication Critical patent/DE59606813D1/en
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
    • H05B41/26—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

Abstract

The gas-discharge tube (LP) with e.g. its preheater (VH) is connected to the output of a generator (G) of AC at a predetermined high frequency from the mains supply. A control input of the generator is connected to a switch-off device (AV) producing a signal (CS1) when activated by the detector (VE) of the peak-to-peak voltage across the lamp. The output (UA) of the detector is proportional to the detected peak-to-peak voltage. When this output exceeds a threshold value the generator is switched off.
DE59606813T 1995-02-17 1996-02-08 Method for switching off a circuit arrangement for operating a discharge lamp Expired - Lifetime DE59606813D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19505460A DE19505460A1 (en) 1995-02-17 1995-02-17 Circuit arrangement for operating a discharge lamp

Publications (1)

Publication Number Publication Date
DE59606813D1 true DE59606813D1 (en) 2001-05-31

Family

ID=7754293

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19505460A Withdrawn DE19505460A1 (en) 1995-02-17 1995-02-17 Circuit arrangement for operating a discharge lamp
DE59606813T Expired - Lifetime DE59606813D1 (en) 1995-02-17 1996-02-08 Method for switching off a circuit arrangement for operating a discharge lamp

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19505460A Withdrawn DE19505460A1 (en) 1995-02-17 1995-02-17 Circuit arrangement for operating a discharge lamp

Country Status (4)

Country Link
EP (1) EP0727921B1 (en)
AT (1) ATE200842T1 (en)
DE (2) DE19505460A1 (en)
FI (1) FI113736B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6054013A (en) * 1996-02-02 2000-04-25 Applied Materials, Inc. Parallel plate electrode plasma reactor having an inductive antenna and adjustable radial distribution of plasma ion density
EP0843505A1 (en) 1996-11-19 1998-05-20 Siemens Aktiengesellschaft Electronic ballast for at least one discharge lamp
DE19715341C1 (en) * 1997-04-12 1998-10-15 Vossloh Schwabe Gmbh Electronic ballast with automatic restart
DE10013342A1 (en) * 2000-03-17 2001-09-27 Trilux Lenze Gmbh & Co Kg Producing ignition voltage for fluorescent lamps involves applying start voltages of reducing frequency until lamp voltage reaches desired value

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023516A (en) * 1988-05-10 1991-06-11 Matsushita Electric Industrial Co., Ltd. Discharge lamp operation apparatus
CH683219A5 (en) * 1992-04-06 1994-01-31 Starkstrom Elektronik Ag Electronic ballast for a low-pressure gas discharge lamp.
US5574335A (en) * 1994-08-02 1996-11-12 Osram Sylvania Inc. Ballast containing protection circuit for detecting rectification of arc discharge lamp
FI98263C (en) * 1995-11-27 1997-05-12 Helvar Oy Fluorescent lamp electronic ballast protection circuit

Also Published As

Publication number Publication date
ATE200842T1 (en) 2001-05-15
FI113736B (en) 2004-05-31
EP0727921A3 (en) 1998-05-27
DE19505460A1 (en) 1996-08-22
EP0727921B1 (en) 2001-04-25
EP0727921A2 (en) 1996-08-21
FI960659A0 (en) 1996-02-14
FI960659A (en) 1996-08-18

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG, , DE