Apparatus having a driven member and a drive controller therefor

Details Apparatus having a driven member and a drive controller therefor Apparatus having a driven member and a drive controller therefor

1998-07-20

2000-07-04

Perkey, W. B.

Photography

Camera shake sensing

With photoarray

396100, 396111, 396106, 2502081, G03B 1336, H01L 2700

Patent

active

060850396

ABSTRACT:
An apparatus has a member to be driven, an actuator for driving the member, a position detector and a controller. The actuator drives the member to move by an amount proportional to a given number of pulses. The position detector detects a position of the member in predetermined detection steps. The controller determines in steps smaller than the predetermined detection steps a target position up to which the member is to be moved. Then, it controls the actuator up to a detection-step position before the target position by closed-loop control in accordance with a detection result from the detector. Further, it controls the actuator from the detection step position to the target position by open-loop control.

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patent: 5428420 (1995-06-01), Akashi et al.
patent: 5771411 (1998-06-01), Iwasaki

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