JPS5579422A - Control circuit of camera - Google Patents
Control circuit of cameraInfo
- Publication number
- JPS5579422A JPS5579422A JP15344678A JP15344678A JPS5579422A JP S5579422 A JPS5579422 A JP S5579422A JP 15344678 A JP15344678 A JP 15344678A JP 15344678 A JP15344678 A JP 15344678A JP S5579422 A JPS5579422 A JP S5579422A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- closed
- switch means
- switch
- camera
- 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.)
- Granted
Links
Landscapes
- Power Sources (AREA)
- Exposure Control For Cameras (AREA)
Abstract
PURPOSE: To save power in control circuit, by supplying clock pulses to the circuit while performing control action, and stopping supply of clock pulses upon completion of control action.
CONSTITUTION: When a battery is fitted in a camera, a pulse generator 2 continues to oscillate incessantly, and the output thereof is sent into a gate circuit 4. In this state, when a photometric switch or release switch is closed for taking photograph, switch means 5 or 6 is closed in cooperation thereof, and a signal is generated from a gate circuit 3 to open the gate circuit 4, then the output pulse from the generator 2 is applied to a microprocessor μP1, which is then changed from waiting state to active state to perform sequence control. When the photographer takes his hand from the shutter button, the switch means 5 or 6 is opened, so that signal from the circuit 3 is eliminated. The circuit 4, however, remains open, and when μP1 detects opening of the switch means 5 or 6, the circuit 4 is finally closed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15344678A JPS5579422A (en) | 1978-12-11 | 1978-12-11 | Control circuit of camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15344678A JPS5579422A (en) | 1978-12-11 | 1978-12-11 | Control circuit of camera |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5579422A true JPS5579422A (en) | 1980-06-14 |
JPH0154688B2 JPH0154688B2 (en) | 1989-11-20 |
Family
ID=15562718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15344678A Granted JPS5579422A (en) | 1978-12-11 | 1978-12-11 | Control circuit of camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5579422A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57101434A (en) * | 1980-12-16 | 1982-06-24 | Toshiba Corp | Oscillator |
JPS5948739A (en) * | 1982-09-13 | 1984-03-21 | Nippon Kogaku Kk <Nikon> | Camera using microcomputer |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5028831A (en) * | 1973-07-16 | 1975-03-24 | ||
JPS50132923A (en) * | 1974-04-05 | 1975-10-21 |
-
1978
- 1978-12-11 JP JP15344678A patent/JPS5579422A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5028831A (en) * | 1973-07-16 | 1975-03-24 | ||
JPS50132923A (en) * | 1974-04-05 | 1975-10-21 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57101434A (en) * | 1980-12-16 | 1982-06-24 | Toshiba Corp | Oscillator |
JPS5948739A (en) * | 1982-09-13 | 1984-03-21 | Nippon Kogaku Kk <Nikon> | Camera using microcomputer |
Also Published As
Publication number | Publication date |
---|---|
JPH0154688B2 (en) | 1989-11-20 |
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