JPS6489298A - Discharge lamp lighting device - Google Patents

Discharge lamp lighting device

Info

Publication number
JPS6489298A
JPS6489298A JP24686287A JP24686287A JPS6489298A JP S6489298 A JPS6489298 A JP S6489298A JP 24686287 A JP24686287 A JP 24686287A JP 24686287 A JP24686287 A JP 24686287A JP S6489298 A JPS6489298 A JP S6489298A
Authority
JP
Japan
Prior art keywords
voltage
rectification
circuit
input
over
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
JP24686287A
Other languages
Japanese (ja)
Inventor
Fuminori Nakaya
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.)
Toshiba Electric Equipment Corp
Original Assignee
Toshiba Electric Equipment Corp
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 Toshiba Electric Equipment Corp filed Critical Toshiba Electric Equipment Corp
Priority to JP24686287A priority Critical patent/JPS6489298A/en
Publication of JPS6489298A publication Critical patent/JPS6489298A/en
Pending legal-status Critical Current

Links

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

PURPOSE:To dispense with a large switching element and realize stepped light adjustment with simple constitution by providing a changing-over circuit which changes over a rectification method between full wave rectification and double voltage rectification in a rectification smoothing circuit and changing over the output of a lighting circuit by this rectification method. CONSTITUTION:The AC input of a power source A is rectified at a diode bridge in a rectification smoothing circuit F and smoothed at condensers C1, C2 and input into a lighting circuit B. Then, if a change-over circuit S is closed, the AC input of the power source A is rectified into double voltage, and voltage 2E double the power source voltage E is input into the lighting circuit B, and the output voltage of the lighting circuit B becomes full lighting voltage and a lamp La lights fully. On the otherhand, if the change-over circuit S is opened, the AC input of the power source A changes from double voltage rectification over to full wave rectification and the voltage E of the power source A becomes the input voltage of the lighting circuit B and the lamp La is changed over to lighting at step-adjusted light. Hereby, a switching element having large capacity becomes needless and step light adjustment becomes possible with simple constitution.
JP24686287A 1987-09-30 1987-09-30 Discharge lamp lighting device Pending JPS6489298A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24686287A JPS6489298A (en) 1987-09-30 1987-09-30 Discharge lamp lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24686287A JPS6489298A (en) 1987-09-30 1987-09-30 Discharge lamp lighting device

Publications (1)

Publication Number Publication Date
JPS6489298A true JPS6489298A (en) 1989-04-03

Family

ID=17154835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24686287A Pending JPS6489298A (en) 1987-09-30 1987-09-30 Discharge lamp lighting device

Country Status (1)

Country Link
JP (1) JPS6489298A (en)

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