JPS54105869A - Discharge lamp flashing control system - Google Patents

Discharge lamp flashing control system

Info

Publication number
JPS54105869A
JPS54105869A JP681578A JP681578A JPS54105869A JP S54105869 A JPS54105869 A JP S54105869A JP 681578 A JP681578 A JP 681578A JP 681578 A JP681578 A JP 681578A JP S54105869 A JPS54105869 A JP S54105869A
Authority
JP
Japan
Prior art keywords
lamp
circuit
thr1
filaments
inverter
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.)
Granted
Application number
JP681578A
Other languages
Japanese (ja)
Other versions
JPS5843879B2 (en
Inventor
Tsunetaka Kawai
Toyoji Murakami
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 Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP681578A priority Critical patent/JPS5843879B2/en
Publication of JPS54105869A publication Critical patent/JPS54105869A/en
Publication of JPS5843879B2 publication Critical patent/JPS5843879B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To reduce power consumption while preventing early deterioration of filaments by minimizing filament power loss in a discharge lamp flashing control system suitable for facsimile equipment. CONSTITUTION:Filaments of a discharge lamp FL are pre-heated for standby by pre-heating coils N3 and N5 of an output transformer T in an inverter, while a lighting coil N4 is connected to both ends of the lamp FL through a two-way three- terminal thyristor THR1 acting as a first switching element in such a manner that a flashing control circuit 4 allows a thyristor THR1 to control the flashing of the lamp FL. In a system of this type, the inverter is provided with a pre-heating current limiting circuit 1. With the on-or-off action of a transistor Q3, the circuit 1 allows a resistor R3 in a feed back circuit of the inverter to be short-circuited or opened so that current for pre-heating the filaments of the lamp FL can be limited when the lamp FL is pre-heated in standby and the circuit 4 can be actuated at a delayed time by a delay circuit 2 to turn the thyristor THR1 on when the lamp FL comes on.
JP681578A 1978-01-24 1978-01-24 Discharge lamp blinking control method Expired JPS5843879B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP681578A JPS5843879B2 (en) 1978-01-24 1978-01-24 Discharge lamp blinking control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP681578A JPS5843879B2 (en) 1978-01-24 1978-01-24 Discharge lamp blinking control method

Publications (2)

Publication Number Publication Date
JPS54105869A true JPS54105869A (en) 1979-08-20
JPS5843879B2 JPS5843879B2 (en) 1983-09-29

Family

ID=11648691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP681578A Expired JPS5843879B2 (en) 1978-01-24 1978-01-24 Discharge lamp blinking control method

Country Status (1)

Country Link
JP (1) JPS5843879B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958796A (en) * 1982-09-29 1984-04-04 東芝ライテック株式会社 Device for firing discharge lamp
JPS60227395A (en) * 1984-04-24 1985-11-12 松下電工株式会社 Device for firing discharge lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958796A (en) * 1982-09-29 1984-04-04 東芝ライテック株式会社 Device for firing discharge lamp
JPH0423399B2 (en) * 1982-09-29 1992-04-22 Toshiba Raitetsuku Kk
JPS60227395A (en) * 1984-04-24 1985-11-12 松下電工株式会社 Device for firing discharge lamp
JPH0329158B2 (en) * 1984-04-24 1991-04-23 Matsushita Electric Works Ltd

Also Published As

Publication number Publication date
JPS5843879B2 (en) 1983-09-29

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