Title:
【発明の名称】プログラムシヤツタの制御回路
Document Type and Number:
Japanese Patent JPH0740108
Kind Code:
B2
Abstract:
In a program shutter including a forwardly/reversely rotatable step motor for opening and closing a shutter blade to effect automatic exposure, a drive pulse number and an interpolation quantity are set in first and second counters. A step drive pulse is generated by the first counter to start opening the sectors. After a final pulse is generated, the second counter is started, and at the timing when the time corresponding to the interpolation quantity is elapsed, the step motor is reversely rotated thereby to fractionate a gap between steps and obtain a proper exposure quantity.
Inventors:
Ogewara
Oda Hajime
Yoichi Seki
Hiroshi Yamazaki
Oda Hajime
Yoichi Seki
Hiroshi Yamazaki
Application Number:
JP11031184A
Publication Date:
May 01, 1995
Filing Date:
May 30, 1984
Export Citation:
Assignee:
Seikosha Co., Ltd.
International Classes:
G03B7/097; G03B7/091; G03B9/24; (IPC1-7): G03B7/097; G03B9/24
Domestic Patent References:
| JP50137534A | ||||
| JP5044823A | ||||
| JP5540480A |
Attorney, Agent or Firm:
Kazuko Matsuda
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