Time-sharing drive apparatus for motor of camera

Details Time-sharing drive apparatus for motor of camera Time-sharing drive apparatus for motor of camera

1997-12-30

2000-01-11

Adams, Russell

Photography

Control circuit for sequencing at least three functions

396301, 396303, G03B 1700

Patent

active

060145234

ABSTRACT:
A time-sharing drive apparatus for a camera having a plurality of motors includes a motor drive control system which alternately drives the motors in a time-sharing control. When the camera includes a zoom lens provided with a first stationary lens group, a second movable lens group and a third movable lens group, the motors are composed of a first motor which opens and closes a diaphragm of the zoom lens, a second motor which moves the second lens group, and a third motor which drives the third lens group. The motor drive control system which drives the first, second and third motors is controlled via a time-sharing system.

REFERENCES:
patent: 3911449 (1975-10-01), Watanabe
patent: 4446526 (1984-05-01), Iwanade
patent: 5202721 (1993-04-01), Kobayashi et al.
patent: 5467200 (1995-11-01), Ohsawa et al.
patent: 5671449 (1997-09-01), Shimizu

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