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JPS5670537A - Display unit of availability for flashing - Google Patents

Display unit of availability for flashing

Info

Publication number
JPS5670537A
JPS5670537A JP14643879A JP14643879A JPS5670537A JP S5670537 A JPS5670537 A JP S5670537A JP 14643879 A JP14643879 A JP 14643879A JP 14643879 A JP14643879 A JP 14643879A JP S5670537 A JPS5670537 A JP S5670537A
Authority
JP
Japan
Prior art keywords
voltage
flashing
availability
exposure control
display
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
JP14643879A
Other languages
Japanese (ja)
Inventor
Yoshiaki Otsubo
Kazuyuki Kazami
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.)
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
Nippon Chemical Industrial Co Ltd
Nippon Kogaku KK
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 Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical Nippon Chemical Industrial Co Ltd
Priority to JP14643879A priority Critical patent/JPS5670537A/en
Publication of JPS5670537A publication Critical patent/JPS5670537A/en
Pending legal-status Critical Current

Links

Landscapes

  • Stroboscope Apparatuses (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)

Abstract

PURPOSE: To perform the display by which a photographer is never misled by making no display of the availability for flashing in case that although the voltage exceeds the flashing availability voltage, it is lower than the minimum voltage available for exposure control.
CONSTITUTION: As the voltage across battery 100 decreases below the operating voltage of automatic exposure control circuit 14, the output of comparator 8 decreases in level to turn off transistor 19 and operational amplifier 9 generates a low- level output. Consequently, transistor 7 turns off and even when the charged voltage of main capacitor 5 for flashing reaches the flashing availability voltage, display light 6 never turns on. Therefore, when the voltage is higher than the flashing availability voltage and lower then the minimum voltage available for exposure control, the display of flashing availability is performed. When the voltage, even if higher than the flashing availability voltage, is below the minimum voltage available for exposure control, the flashing availability is not displayed.
COPYRIGHT: (C)1981,JPO&Japio
JP14643879A 1979-11-14 1979-11-14 Display unit of availability for flashing Pending JPS5670537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14643879A JPS5670537A (en) 1979-11-14 1979-11-14 Display unit of availability for flashing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14643879A JPS5670537A (en) 1979-11-14 1979-11-14 Display unit of availability for flashing

Publications (1)

Publication Number Publication Date
JPS5670537A true JPS5670537A (en) 1981-06-12

Family

ID=15407658

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14643879A Pending JPS5670537A (en) 1979-11-14 1979-11-14 Display unit of availability for flashing

Country Status (1)

Country Link
JP (1) JPS5670537A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0239224U (en) * 1988-09-06 1990-03-15

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112135A (en) * 1974-07-20 1976-01-30 Nippon Kogaku Kk
JPS51131318A (en) * 1975-05-09 1976-11-15 Fuji Photo Optical Co Ltd Strobo electric source device for the camera

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112135A (en) * 1974-07-20 1976-01-30 Nippon Kogaku Kk
JPS51131318A (en) * 1975-05-09 1976-11-15 Fuji Photo Optical Co Ltd Strobo electric source device for the camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0239224U (en) * 1988-09-06 1990-03-15

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