JPS5447639A - Flash light emission controller - Google Patents

Flash light emission controller

Info

Publication number
JPS5447639A
JPS5447639A JP11433877A JP11433877A JPS5447639A JP S5447639 A JPS5447639 A JP S5447639A JP 11433877 A JP11433877 A JP 11433877A JP 11433877 A JP11433877 A JP 11433877A JP S5447639 A JPS5447639 A JP S5447639A
Authority
JP
Japan
Prior art keywords
charging voltage
circuit
actuates
led
flash photographing
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
JP11433877A
Other languages
Japanese (ja)
Inventor
Tetsuya Taguchi
Isao Harigaya
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP11433877A priority Critical patent/JPS5447639A/en
Publication of JPS5447639A publication Critical patent/JPS5447639A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To detect the charging voltage of a main capacitor and display this by detecting the oscillation frequencies of a boosting oscillator within a strobe device. CONSTITUTION:A display control circuit B which detects the charging voltage of a strobe control circuit A through the oscillation frequencies of a boosting circuit 1 is constituted by a waveform shaping circuit 20 and frequency detection circuits 30, 40, 50. The frequency detection circuits 30, 40 50 are provided respectively with LEDs 37, 47, 57 as display devices. When the charging voltage of a capacitor 7 reaches a specified value, the detection circuit 30 first actuates and this is displayed with the LED 37. Further when the charging voltage reaches flash photographing ready state, the detection circuit 40 actuates to indicate with the LED 47 that flash photographing is ready. When the charging voltage reaches the full charging voltage, the detection circuit 50 actuates to indicate with the LED 57 that the flash photographing range has expanded.
JP11433877A 1977-09-21 1977-09-21 Flash light emission controller Pending JPS5447639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11433877A JPS5447639A (en) 1977-09-21 1977-09-21 Flash light emission controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11433877A JPS5447639A (en) 1977-09-21 1977-09-21 Flash light emission controller

Publications (1)

Publication Number Publication Date
JPS5447639A true JPS5447639A (en) 1979-04-14

Family

ID=14635275

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11433877A Pending JPS5447639A (en) 1977-09-21 1977-09-21 Flash light emission controller

Country Status (1)

Country Link
JP (1) JPS5447639A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622033U (en) * 1985-06-20 1987-01-08

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622033U (en) * 1985-06-20 1987-01-08
JPH0514270Y2 (en) * 1985-06-20 1993-04-16

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