JPS5611442A - Detecting circuit for stoppage of stopping-down in exposure control unit - Google Patents
Detecting circuit for stoppage of stopping-down in exposure control unitInfo
- Publication number
- JPS5611442A JPS5611442A JP8576179A JP8576179A JPS5611442A JP S5611442 A JPS5611442 A JP S5611442A JP 8576179 A JP8576179 A JP 8576179A JP 8576179 A JP8576179 A JP 8576179A JP S5611442 A JPS5611442 A JP S5611442A
- Authority
- JP
- Japan
- Prior art keywords
- control member
- travelling
- aperture control
- stoppage
- counter
- 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
Landscapes
- Diaphragms For Cameras (AREA)
- Exposure Control For Cameras (AREA)
Abstract
PURPOSE: To make possible the direct detection of the completion of running of an aperture control member without providing any switching means by detecting the stoppage of stopping-down by way of a counter which is reset by the pulse generated at the travelling of said control member.
CONSTITUTION: When a pulse Pn' generated by a gear, etc. turning cooperatively with the travelling of an aperture control member is applied to a counter 4 via an OR circuit G7, the counter 4 is reset. Hence, when the travelling of the aperture control member stops, the counter 4 counts clock ϕ0', generates a count-up signal ϕs of a high level and resets a flip-flop F2. The reset output of this F2 becomes the travelling stoppage detection signal of the aperture control member, and the subsequent sequence of mirror-up, etc. is controlled by this signal. This constitution enables the travelling stoppage of the aperture control member to be directly and accurately detected without any effect of change of the travelling speed, etc. without providing any switch, etc. operated by the aperture control member etc.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8576179A JPS5611442A (en) | 1979-07-06 | 1979-07-06 | Detecting circuit for stoppage of stopping-down in exposure control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8576179A JPS5611442A (en) | 1979-07-06 | 1979-07-06 | Detecting circuit for stoppage of stopping-down in exposure control unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5611442A true JPS5611442A (en) | 1981-02-04 |
Family
ID=13867839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8576179A Pending JPS5611442A (en) | 1979-07-06 | 1979-07-06 | Detecting circuit for stoppage of stopping-down in exposure control unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5611442A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57200018A (en) * | 1981-06-03 | 1982-12-08 | Sony Corp | Aperture adjusting device of camera |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5319814A (en) * | 1976-08-06 | 1978-02-23 | Matsushita Electric Ind Co Ltd | Control signal generating circuit |
-
1979
- 1979-07-06 JP JP8576179A patent/JPS5611442A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5319814A (en) * | 1976-08-06 | 1978-02-23 | Matsushita Electric Ind Co Ltd | Control signal generating circuit |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57200018A (en) * | 1981-06-03 | 1982-12-08 | Sony Corp | Aperture adjusting device of camera |
JPH038527B2 (en) * | 1981-06-03 | 1991-02-06 | Sony Corp |
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