US Patent No. 10,244,173

DRIVING DEVICE PROVIDED IN IMAGE STABILIZER, CONTROL METHOD THEREFOR, AND IMAGE PICKUP APPARATUS


Patent No. 10,244,173
Issue Date March 26, 2019
Title Driving Device Provided In Image Stabilizer, Control Method Therefor, And Image Pickup Apparatus
Inventorship Ryo Abe, Tokyo (JP)
Mitsuhiro Izumi, Yokohama (JP)
Assignee CANON KABUSHIKI KAISHA, Tokyo (JP)

Claim of US Patent No. 10,244,173

1. A driving device for driving a moving part that is movably supported by a fixing part in a predetermined direction, the driving device comprising:a first actuator and a second actuator each of which is provided with a coil arranged in one of the fixing part and the moving part and a magnet arranged in the other part so as to face the coil, a thrust being given to the moving part so as to drive the moving part in the predetermined direction;
a memory device that stores a set of instructions; and
at least one processor that executes the instructions to control an electric current supplied to the coil of the first actuator in response to a result obtained by multiplying a first coefficient that varies in response to the position of the moving part by a first control value obtained from a first function based on the position of the moving part, and to control an electric current supplied to the coil of the second actuator in response to a result obtained by multiplying a second coefficient that varies in response to the position of the moving part by a second control value obtained from a second function that is different from the first function based on the position of the moving part.