Title:
ACTUATOR CONTROL DEVICE AND APPARATUS INCLUDING THE SAME
Document Type and Number:
Japanese Patent JP2015049362
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To control driving of an actuator with high accuracy.SOLUTION: A control device 100 includes a magnetic detection element 23 and a CPU 101 which controls driving of an actuator on the basis of a difference between a detected position of a lens holding frame 12 and a target position of the lens holding frame. The CPU performs positioning adjustment for acquiring correlation among the output of the magnetic detection element, the actual position of the lens holding frame, and a signal indicative of the target position of the lens holding frame, which is used in driving control of the actuator. In this positioning adjustment, the CPU acquires positions of both ends A and B of a movable stroke restricting movement of the lens holding frame by mechanical contact with the lens holding frame, the movable stroke, and outputs of the magnetic detection elements corresponding to both ends in accordance with a position in which an inclination α_cent obtained by dividing a variation in output of the magnetic detection element in the vicinity of the center of the movable stroke of the lens holding frame by a variation in detected position of the lens holding frame is changed.
Inventors:
HIRUTA KAORI
Application Number:
JP2013180862A
Publication Date:
March 16, 2015
Filing Date:
September 02, 2013
Export Citation:
Assignee:
CANON KK
International Classes:
G03B5/00; G03B9/02
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsuya Mizumoto
Michiya Hirayama
Atsuya Mizumoto
Michiya Hirayama
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