EP1191824A3 - Electronic ballast for fluorescent lamp - Google Patents

Electronic ballast for fluorescent lamp Download PDF

Info

Publication number
EP1191824A3
EP1191824A3 EP01660174A EP01660174A EP1191824A3 EP 1191824 A3 EP1191824 A3 EP 1191824A3 EP 01660174 A EP01660174 A EP 01660174A EP 01660174 A EP01660174 A EP 01660174A EP 1191824 A3 EP1191824 A3 EP 1191824A3
Authority
EP
European Patent Office
Prior art keywords
lamp
series connection
load circuit
heating
electronic ballast
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.)
Withdrawn
Application number
EP01660174A
Other languages
German (de)
French (fr)
Other versions
EP1191824A2 (en
Inventor
Hannu Vihinen
Teijo Viljanen
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.)
Helvar Oy AB
Original Assignee
Helvar Oy AB
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 Helvar Oy AB filed Critical Helvar Oy AB
Publication of EP1191824A2 publication Critical patent/EP1191824A2/en
Publication of EP1191824A3 publication Critical patent/EP1191824A3/en
Withdrawn legal-status Critical Current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

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

The invention relates to an electronic ballast for a fluorescent lamp, the lamp load circuit being connected between the inverter power switch elements (S1, S2). The lamp load circuit comprises an inductor (LR) in a series connection with the lamp. Prior to the ignition of the lamp, the lamp load circuit also includes a capacitor (CR) in a series connection with the heating transformer primary winding (T1a), this series connection being in parallel with the lamp. The heating current is supplied to the lamp cathodes solely via the heating transformer secondary windings (T1b, T1c), whereby the heating current can be shut off by way of setting a switch element (S3) that is in parallel with the transformer primary winding (T1a) in an ON condition. The heating current may be controlled to a desired level by driving the switch (S3) ON and OFF with a pulse-width-controlled drive signal.
EP01660174A 2000-09-20 2001-09-19 Electronic ballast for fluorescent lamp Withdrawn EP1191824A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20002069 2000-09-20
FI20002069A FI108105B (en) 2000-09-20 2000-09-20 Electronic connection arrangement for a fluorescent tube

Publications (2)

Publication Number Publication Date
EP1191824A2 EP1191824A2 (en) 2002-03-27
EP1191824A3 true EP1191824A3 (en) 2003-12-17

Family

ID=8559118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01660174A Withdrawn EP1191824A3 (en) 2000-09-20 2001-09-19 Electronic ballast for fluorescent lamp

Country Status (2)

Country Link
EP (1) EP1191824A3 (en)
FI (1) FI108105B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20065033L (en) 2006-01-18 2007-07-19 Helvar Oy Ab Electronic connection device for fluorescent tubes
EP1992205A1 (en) 2006-02-28 2008-11-19 Koninklijke Philips Electronics N.V. Method and device for driving a discharge lamp
US20100327759A1 (en) 2009-06-24 2010-12-30 Koninklijke Philips Electronics N.V. Electronic ballast for a fluorescent lamp
US20130009565A1 (en) * 2010-03-19 2013-01-10 Koninklijke Philips Electronics N.V. Electronic ballast for parallel lamp operation with program start

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0769889A1 (en) * 1995-10-20 1997-04-23 Koninklijke Philips Electronics N.V. Circuit arrangement
US5656891A (en) * 1994-10-13 1997-08-12 Tridonic Bauelemente Gmbh Gas discharge lamp ballast with heating control circuit and method of operating same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE147926T1 (en) * 1992-09-24 1997-02-15 Knobel Lichttech CIRCUIT ARRANGEMENT FOR OPERATING A FLUORESCENT LAMP AND FOR MEASURING THE LAMP CURRENT

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5656891A (en) * 1994-10-13 1997-08-12 Tridonic Bauelemente Gmbh Gas discharge lamp ballast with heating control circuit and method of operating same
EP0769889A1 (en) * 1995-10-20 1997-04-23 Koninklijke Philips Electronics N.V. Circuit arrangement

Also Published As

Publication number Publication date
EP1191824A2 (en) 2002-03-27
FI20002069A0 (en) 2000-09-20
FI108105B (en) 2001-11-15

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