Exposure member drive control device

Details Exposure member drive control device Exposure member drive control device

1987-03-17

1989-08-15

Perkey, W. B.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

354456, 318466, 318685, G03B 700, G05D 300

Patent

active

048579521

ABSTRACT:
Control device for controlling the driving motion of an exposure member, such as a diaphragm or shutter, so as to variably control the aperture opening thereof, wherein a particular value for the diaphragm or shutter is determined and the diaphragm or shutter is set to the determined value, and if the determined value is detected by a detector while the diaphragm or shutter is in the initial state, the diaphragm or shutter is initially driven in the opening or closing direction.

REFERENCES:
patent: 4299459 (1981-10-01), Mizokami
patent: 4322144 (1982-03-01), Suzuki et al.
patent: 4423937 (1984-01-01), Suzuki et al.

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