JPS54105869A - Discharge lamp flashing control system - Google Patents
Discharge lamp flashing control systemInfo
- 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
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.
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)
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 |
-
1978
- 1978-01-24 JP JP681578A patent/JPS5843879B2/en not_active Expired
Cited By (4)
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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