JPS5694320A - Control circuit including operation stabilizing circuit for automatic focusing camera - Google Patents
Control circuit including operation stabilizing circuit for automatic focusing cameraInfo
- Publication number
- JPS5694320A JPS5694320A JP17066579A JP17066579A JPS5694320A JP S5694320 A JPS5694320 A JP S5694320A JP 17066579 A JP17066579 A JP 17066579A JP 17066579 A JP17066579 A JP 17066579A JP S5694320 A JPS5694320 A JP S5694320A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- counter
- reset
- output
- operation stabilizing
- 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
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE: To suppress the occurrence of unstable operation by providing an operation stabilizing circuit which generates the signal for forcibly stopping a photographic lens near the focusing position.
CONSTITUTION: The signal outputted from a detector 3 is logically processed by a direction instructing circuit 4 and a stop instructing circuit 5. The outputs of both instruction circuits 4, 5 are inputted to a focusing motor driving circuit 6 via an AND circuit. The operation stabilizing circuit 2 within the dotted line frame is provided. If the output signal of the Q' output terminal of the direction instructing circuit 4 inverts, a positive pulse is applied to the 1st binary counter 7 by a CR circuit, and the output terminals 1W8 of the counter 7 are reset; at the same time, said counter receives the clock from an oscillator 8 and counts the same. When the Q' output from the circuit 4 inverts while the 1st counter 7 is counting, the 2nd counter 10 is reset and starts counting the clock from the oscillator 8. If the 3rd and 4th inversions occur, the 1st, 2nd counters 7, 10 are reset every time, hence, the focusing motor remains stopped.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17066579A JPS5694320A (en) | 1979-12-28 | 1979-12-28 | Control circuit including operation stabilizing circuit for automatic focusing camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17066579A JPS5694320A (en) | 1979-12-28 | 1979-12-28 | Control circuit including operation stabilizing circuit for automatic focusing camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5694320A true JPS5694320A (en) | 1981-07-30 |
Family
ID=15909095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17066579A Pending JPS5694320A (en) | 1979-12-28 | 1979-12-28 | Control circuit including operation stabilizing circuit for automatic focusing camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5694320A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142508A (en) * | 1983-07-11 | 1984-08-15 | Minolta Camera Co Ltd | Automatic focus adjusting device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52126225A (en) * | 1976-04-15 | 1977-10-22 | Asahi Optical Co Ltd | Automatic focusing unit control circuit for ignoring pseudoofocus position detection signal |
| JPS5616116A (en) * | 1979-07-12 | 1981-02-16 | Agfa Gevaert Ag | Balance controller for photographic device |
-
1979
- 1979-12-28 JP JP17066579A patent/JPS5694320A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52126225A (en) * | 1976-04-15 | 1977-10-22 | Asahi Optical Co Ltd | Automatic focusing unit control circuit for ignoring pseudoofocus position detection signal |
| JPS5616116A (en) * | 1979-07-12 | 1981-02-16 | Agfa Gevaert Ag | Balance controller for photographic device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142508A (en) * | 1983-07-11 | 1984-08-15 | Minolta Camera Co Ltd | Automatic focus adjusting device |
| JPH0559412B2 (en) * | 1983-07-11 | 1993-08-31 | Minolta Camera Kk |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5694320A (en) | Control circuit including operation stabilizing circuit for automatic focusing camera | |
| JPS5779922A (en) | Automatic focusing camera | |
| JPS561024A (en) | Automatic focusing type camera | |
| JPS57208520A (en) | Automatic focusing device | |
| JPS5742030A (en) | Camera | |
| JPS55146433A (en) | Warning device of automatic exposure camera | |
| US4518243A (en) | Shutter speed setting device for camera | |
| JPS57146242A (en) | Auto-focus continuous photographic camera capable of switching preference mode | |
| JPS55106434A (en) | Exposure adjusting device | |
| JPS56109322A (en) | Camera | |
| JPS56164331A (en) | Motor driving device | |
| JPS5467721A (en) | Crt brightness controller | |
| JPS52114320A (en) | Single lens reflex camera | |
| JPS52152220A (en) | Exposure display device for single lens reflex camera of automatic exposure control type | |
| JPS5748449A (en) | Detecting method of operating position of limit switch detecting original point in numerically controlled machine tool | |
| JPS54128735A (en) | Warning device for camera | |
| JPS56167130A (en) | Automatic focusing camera | |
| JPS54111334A (en) | Film number counter of cameras | |
| JPS5438116A (en) | Warning system for misoperation of camera | |
| JPS54122123A (en) | Shutter speed reproducer of cameras | |
| JPS56159628A (en) | Single-lens reflex camera equipped with photographic sequence control circuit | |
| JPS57142630A (en) | Camera having automatic focus adjuster | |
| GB1479705A (en) | Photographic cameras | |
| JPS55146428A (en) | Digital control camera | |
| JPS56157517A (en) | Detecting system for input clock fault |