WO2000024233A3 - Ballast circuit - Google Patents

Ballast circuit Download PDF

Info

Publication number
WO2000024233A3
WO2000024233A3 PCT/US1999/023674 US9923674W WO0024233A3 WO 2000024233 A3 WO2000024233 A3 WO 2000024233A3 US 9923674 W US9923674 W US 9923674W WO 0024233 A3 WO0024233 A3 WO 0024233A3
Authority
WO
WIPO (PCT)
Prior art keywords
switching element
circuit includes
lamp
circuit
inverter
Prior art date
Application number
PCT/US1999/023674
Other languages
French (fr)
Other versions
WO2000024233A2 (en
Inventor
Mihail S Moisin
Original Assignee
Electro Mag Int Inc
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 claimed from US09/173,850 external-priority patent/US6169375B1/en
Priority claimed from US09/173,966 external-priority patent/US6127786A/en
Priority claimed from US09/173,852 external-priority patent/US6181083B1/en
Application filed by Electro Mag Int Inc filed Critical Electro Mag Int Inc
Priority to CA002347470A priority Critical patent/CA2347470A1/en
Priority to AU11091/00A priority patent/AU1109100A/en
Publication of WO2000024233A2 publication Critical patent/WO2000024233A2/en
Publication of WO2000024233A3 publication Critical patent/WO2000024233A3/en

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
    • 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

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

A ballast includes a resonant inverter circuit which limits the voltage applied to a lamp when it fails to light. In one embodiment, the inverter includes first and second switching element having conduction states controlled by respective first and second control circuits. The second control circuit includes a third switching element which controls the conduction state of the second switching element. An end of life circuit includes a first threshold circuit coupled to the third switching element for disabling the inverter when the voltage applied to the lamp becomes greater than a first predetermined threshold. In another embodiment, the second control circuit includes a fourth switching element for controlling a duty cycle of the third switching element and the end of life circuit includes a second threshold circuit. When the lamp voltage becomes greater than a second predetermined threshold, the fourth switching element reduces the duty cycle of the third switching element.
PCT/US1999/023674 1998-10-16 1999-10-08 Ballast circuit WO2000024233A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002347470A CA2347470A1 (en) 1998-10-16 1999-10-08 Ballast circuit
AU11091/00A AU1109100A (en) 1998-10-16 1999-10-08 Ballast circuit

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US09/173,966 1998-10-16
US09/173,850 US6169375B1 (en) 1998-10-16 1998-10-16 Lamp adaptable ballast circuit
US09/173,966 US6127786A (en) 1998-10-16 1998-10-16 Ballast having a lamp end of life circuit
US09/173,850 1998-10-16
US09/173,852 1998-10-16
US09/173,852 US6181083B1 (en) 1998-10-16 1998-10-16 Ballast circuit with controlled strike/restart

Publications (2)

Publication Number Publication Date
WO2000024233A2 WO2000024233A2 (en) 2000-04-27
WO2000024233A3 true WO2000024233A3 (en) 2000-09-21

Family

ID=27390346

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/023674 WO2000024233A2 (en) 1998-10-16 1999-10-08 Ballast circuit

Country Status (3)

Country Link
AU (1) AU1109100A (en)
CA (1) CA2347470A1 (en)
WO (1) WO2000024233A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002060228A1 (en) * 2001-01-24 2002-08-01 Stmicroelectronics S.R.L. Fault management method for electronic ballast
US7728528B2 (en) 2004-11-29 2010-06-01 Century Concept Ltd Electronic ballast with preheating and dimming control
CN101277571B (en) 2007-03-30 2014-02-12 电灯专利信托有限公司 Ignition control method for discharge lamp as well as corresponding electronic ballast circuit
WO2008128574A1 (en) * 2007-04-23 2008-10-30 Osram Gesellschaft mit beschränkter Haftung Circuit configuration for starting and operating at least one discharge lamp

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0093469A2 (en) * 1982-04-20 1983-11-09 Koninklijke Philips Electronics N.V. DC/AC converter for the ignition and the supply with alternating current of a gas and/or vapour discharge lamp
EP0127101A1 (en) * 1983-05-27 1984-12-05 Siemens Aktiengesellschaft Inverter for feeding discharge lamps
EP0340049A1 (en) * 1988-02-16 1989-11-02 Applications Et Utilisations Des Proprietes Electriques Des Materiaux Supplying device for a luminescent tube
EP0495571A2 (en) * 1991-01-16 1992-07-22 Intent Patents A.G. Universal electronic ballast system
US5345148A (en) * 1992-02-18 1994-09-06 Singapore Institute Of Standards And Industrial Research DC-AC converter for igniting and supplying a gas discharge lamp
JPH06267675A (en) * 1993-03-15 1994-09-22 Matsushita Electric Works Ltd Discharge lamp lighting device
EP0677981A1 (en) * 1994-04-15 1995-10-18 Knobel Ag Lichttechnische Komponenten Ballast for discharge lamps with lamp change detecting means

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0093469A2 (en) * 1982-04-20 1983-11-09 Koninklijke Philips Electronics N.V. DC/AC converter for the ignition and the supply with alternating current of a gas and/or vapour discharge lamp
EP0127101A1 (en) * 1983-05-27 1984-12-05 Siemens Aktiengesellschaft Inverter for feeding discharge lamps
EP0340049A1 (en) * 1988-02-16 1989-11-02 Applications Et Utilisations Des Proprietes Electriques Des Materiaux Supplying device for a luminescent tube
EP0495571A2 (en) * 1991-01-16 1992-07-22 Intent Patents A.G. Universal electronic ballast system
US5345148A (en) * 1992-02-18 1994-09-06 Singapore Institute Of Standards And Industrial Research DC-AC converter for igniting and supplying a gas discharge lamp
JPH06267675A (en) * 1993-03-15 1994-09-22 Matsushita Electric Works Ltd Discharge lamp lighting device
EP0677981A1 (en) * 1994-04-15 1995-10-18 Knobel Ag Lichttechnische Komponenten Ballast for discharge lamps with lamp change detecting means

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 672 (E - 1646) 19 December 1994 (1994-12-19) *

Also Published As

Publication number Publication date
WO2000024233A2 (en) 2000-04-27
AU1109100A (en) 2000-05-08
CA2347470A1 (en) 2000-04-27

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