JPS54128334A - Electric circuits of camera - Google Patents
Electric circuits of cameraInfo
- 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
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
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)
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 |
-
1978
- 1978-03-28 JP JP3566578A patent/JPS54128334A/en active Pending
Cited By (4)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57118230A (en) | Flash device | |
JPS5557830A (en) | Power supply holding device of camera | |
JPS54128734A (en) | Flash discharger enabled to effect preparatory flash | |
JPS5687028A (en) | Strobe built-in camera | |
JPS54128334A (en) | Electric circuits of camera | |
JPS5433030A (en) | Electric power switch for camera | |
JPS55144222A (en) | Camera control circuit | |
JPS5666833A (en) | Auxiliary light control device for camera using both averaged overall light reading and partial light reading | |
JPS52110037A (en) | Electric source switch for detection circuit for focusing state | |
JPS5616115A (en) | Autofocus camera | |
JPS54100723A (en) | Electric circuit for camera | |
JPS52110036A (en) | Electric source switch for detection circuit for focusing state | |
JPS5540439A (en) | Motor-driven camera | |
JPS54100721A (en) | Electric circuit for camera | |
JPS5441130A (en) | Electric power switch circuit for camera | |
JPS5447644A (en) | Warning display device of cameras | |
JPS524826A (en) | Exposure control circuit for the camera | |
JPS55144215A (en) | Exposure information feeding circuit of electric shutter | |
JPS5492097A (en) | Liquid crystal display unit | |
JPS5447627A (en) | Control circuit for amount of exposure to light of photographing information | |
JPS5553322A (en) | Foldable camera | |
JPS57139725A (en) | Shutter controlling circuit incorporating dimming signal circuit of flash | |
JPS54100722A (en) | Electric circuit for camera | |
JPS5576340A (en) | Camera | |
JPS5624332A (en) | Finder display device of camera |