JPS6484598A - Discharge lamp lighting device - Google Patents

Discharge lamp lighting device

Info

Publication number
JPS6484598A
JPS6484598A JP24146387A JP24146387A JPS6484598A JP S6484598 A JPS6484598 A JP S6484598A JP 24146387 A JP24146387 A JP 24146387A JP 24146387 A JP24146387 A JP 24146387A JP S6484598 A JPS6484598 A JP S6484598A
Authority
JP
Japan
Prior art keywords
filament
spot mode
mode
discharge lamp
power supply
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.)
Pending
Application number
JP24146387A
Other languages
Japanese (ja)
Inventor
Nobuhiro Hayashi
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP24146387A priority Critical patent/JPS6484598A/en
Publication of JPS6484598A publication Critical patent/JPS6484598A/en
Pending 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
    • H05B41/2988—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions
    • 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

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

PURPOSE:To obtain a discharge lamp whose filament service life is not damaged by setting a mode to a double spot mode during high output operation while switching to a single spot mode during low output mode at the time of dimming of the lamp. CONSTITUTION:A double spot mode turns switches SW1, SW2 ON during high output operation. An AC power supply e1 applies AC voltage to an end of each filament F1 or F2. Similarly, an AC power supply e2 applies voltage to the other end of each filament F1 or F2, so lighting is performed by a double spot mode. A single spot mode turns switches SW1, SW2 ON. The power supply e2 is supplied to the end of each filament F1 or F2 through condensors C1, C2 in a different way as before, so it is operated in the single spot mode. It is thus possible to prevent the service life of the filament of the discharge lamp with the optimum maintenance of filament temperature over a wide range.
JP24146387A 1987-09-26 1987-09-26 Discharge lamp lighting device Pending JPS6484598A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24146387A JPS6484598A (en) 1987-09-26 1987-09-26 Discharge lamp lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24146387A JPS6484598A (en) 1987-09-26 1987-09-26 Discharge lamp lighting device

Publications (1)

Publication Number Publication Date
JPS6484598A true JPS6484598A (en) 1989-03-29

Family

ID=17074691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24146387A Pending JPS6484598A (en) 1987-09-26 1987-09-26 Discharge lamp lighting device

Country Status (1)

Country Link
JP (1) JPS6484598A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08190988A (en) * 1991-12-10 1996-07-23 Yasuyuki Namikawa Double spot type dc lighting of inverter type lighting circuit
WO2002076153A1 (en) * 2001-03-21 2002-09-26 Wedeco Ag Water Technology Ballast device for uv emitter and method and device for disinfection of water
CN103947300A (en) * 2011-11-28 2014-07-23 皇家飞利浦有限公司 Improved spot mode operation for a discharge lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08190988A (en) * 1991-12-10 1996-07-23 Yasuyuki Namikawa Double spot type dc lighting of inverter type lighting circuit
WO2002076153A1 (en) * 2001-03-21 2002-09-26 Wedeco Ag Water Technology Ballast device for uv emitter and method and device for disinfection of water
CN103947300A (en) * 2011-11-28 2014-07-23 皇家飞利浦有限公司 Improved spot mode operation for a discharge lamp
CN103947300B (en) * 2011-11-28 2016-03-09 皇家飞利浦有限公司 The method of lighting apparatus and operating discharge lamp

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