JPS5548740A - Electronic flash device - Google Patents

Electronic flash device

Info

Publication number
JPS5548740A
JPS5548740A JP12239878A JP12239878A JPS5548740A JP S5548740 A JPS5548740 A JP S5548740A JP 12239878 A JP12239878 A JP 12239878A JP 12239878 A JP12239878 A JP 12239878A JP S5548740 A JPS5548740 A JP S5548740A
Authority
JP
Japan
Prior art keywords
transistor
switch
synchro
turned
thyrister
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
JP12239878A
Other languages
Japanese (ja)
Other versions
JPS6230410B2 (en
Inventor
Toshiji Kashiwara
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.)
West Electric Co Ltd
Original Assignee
West Electric 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 West Electric Co Ltd filed Critical West Electric Co Ltd
Priority to JP12239878A priority Critical patent/JPS5548740A/en
Publication of JPS5548740A publication Critical patent/JPS5548740A/en
Publication of JPS6230410B2 publication Critical patent/JPS6230410B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To make it possible to ensure turning off of thyrister and to maintain battery voltage under a stable condition even after the light is emitted, by stopping rotary movement of transistor convertor for a specified period after the synchro- switch works. CONSTITUTION:When power supply switch 1 is turned on, battery 2 is supplied to transistor convertor circuit 3, main discharge capacitor 7 and trigger capacitor 16 are charged, and synchro-switch 15 is turned on. When synchro-switch is turned on flashing discharge pipe 6 emits light. At this moment, since transistor 10 is connected and oscillating transistor 4 is disconnected, working of transistor convertor 3 is stopped for a specified period after synchro-switch 15 is turned on. By this mechanism, automatic light adjusting electronic flash device of parallel system using thyrister can surely turn off the thyrister, can maintain the power source of transistor convertor circuit 3 under a stable condition, and can supply the power to other circuits.
JP12239878A 1978-10-03 1978-10-03 Electronic flash device Granted JPS5548740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12239878A JPS5548740A (en) 1978-10-03 1978-10-03 Electronic flash device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12239878A JPS5548740A (en) 1978-10-03 1978-10-03 Electronic flash device

Publications (2)

Publication Number Publication Date
JPS5548740A true JPS5548740A (en) 1980-04-08
JPS6230410B2 JPS6230410B2 (en) 1987-07-02

Family

ID=14834798

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12239878A Granted JPS5548740A (en) 1978-10-03 1978-10-03 Electronic flash device

Country Status (1)

Country Link
JP (1) JPS5548740A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014021154A (en) * 2012-07-12 2014-02-03 Canon Inc Light emitting device and imaging apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4844969U (en) * 1971-09-29 1973-06-12
JPS4855725A (en) * 1971-11-10 1973-08-04

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4844969U (en) * 1971-09-29 1973-06-12
JPS4855725A (en) * 1971-11-10 1973-08-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014021154A (en) * 2012-07-12 2014-02-03 Canon Inc Light emitting device and imaging apparatus

Also Published As

Publication number Publication date
JPS6230410B2 (en) 1987-07-02

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