JPS54128334A - Electric circuits of camera - Google Patents

Electric circuits of camera

Info

Publication number
JPS54128334A
JPS54128334A JP3566578A JP3566578A JPS54128334A JP S54128334 A JPS54128334 A JP S54128334A JP 3566578 A JP3566578 A JP 3566578A JP 3566578 A JP3566578 A JP 3566578A JP S54128334 A JPS54128334 A JP S54128334A
Authority
JP
Japan
Prior art keywords
scr
dark
turned
led
light
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
JP3566578A
Other languages
Japanese (ja)
Inventor
Akira Takahashi
Shinichiro Koshiishi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP3566578A priority Critical patent/JPS54128334A/en
Priority to US06/006,225 priority patent/US4305648A/en
Priority to DE2942435A priority patent/DE2942435C2/en
Priority to DE2902891A priority patent/DE2902891C2/en
Priority to DE2954054A priority patent/DE2954054C2/en
Publication of JPS54128334A publication Critical patent/JPS54128334A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent erroneous display and failure of shutter operation and use the flash light source only when it is dark, by holding the state of alarm mode by switching element.
CONSTITUTION: When a release button is depressed lightly to conduct contacts 1, 2 of SW1, a power source EB is connected between points A and B, and when a trigger switch TRISW is turned on, a divided voltage of photo detector Rcds and resistor R1 is applied to SCR1. When the object is bright, SCR1 is turned on to short-circuit LED, and when the object is dark, SCR1 is turned off to light up the LED, thus holding the alarm mode. As a result, erroneous display of LED is eliminated, and failure of shutter is also prevented. Moreover, the strobe emits light only when the external light is dark.
COPYRIGHT: (C)1979,JPO&Japio
JP3566578A 1978-01-25 1978-03-28 Electric circuits of camera Pending JPS54128334A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP3566578A JPS54128334A (en) 1978-03-28 1978-03-28 Electric circuits of camera
US06/006,225 US4305648A (en) 1978-01-25 1979-01-24 Electric circuits for use in camera
DE2942435A DE2942435C2 (en) 1978-01-25 1979-01-25 Electrical circuit for a camera
DE2902891A DE2902891C2 (en) 1978-01-25 1979-01-25 Circuit for displaying insufficient light conditions in a camera
DE2954054A DE2954054C2 (en) 1978-01-25 1979-01-25 Circuit for displaying insufficient light conditions in a camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3566578A JPS54128334A (en) 1978-03-28 1978-03-28 Electric circuits of camera

Publications (1)

Publication Number Publication Date
JPS54128334A true JPS54128334A (en) 1979-10-04

Family

ID=12448157

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3566578A Pending JPS54128334A (en) 1978-01-25 1978-03-28 Electric circuits of camera

Country Status (1)

Country Link
JP (1) JPS54128334A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147719A (en) * 1982-02-26 1983-09-02 Canon Inc Camera
JPS58147722A (en) * 1982-02-26 1983-09-02 Canon Inc Camera
JPS58147720A (en) * 1982-02-26 1983-09-02 Canon Inc Camera

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147719A (en) * 1982-02-26 1983-09-02 Canon Inc Camera
JPS58147722A (en) * 1982-02-26 1983-09-02 Canon Inc Camera
JPS58147720A (en) * 1982-02-26 1983-09-02 Canon Inc Camera
JPH0526177B2 (en) * 1982-02-26 1993-04-15 Canon Kk

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