Mitsumi Electric Company Ltd.

Takahiro Suzuki

Toshihiko Honma

A camera module includes an actuator body movably supporting a lens assembly along the direction of an optical axis of a lens, a sensor board on which an image pickup device is mounted, a base member disposed between the actuator body and the sensor board. The base member consists of one member which acts as an actuator base and a sensor base.

Camera module comprising three members

A driving method is for a driving apparatus including an electro-mechanical transducer having first and second end surfaces opposite to each other in an expansion/contraction direction, a vibration friction portion mounted to the second end surface of the electro-mechanical transducer, a moving member frictionally coupled to the vibration friction portion, and a vibration transfer member disposed between the second end surface of said electro-mechanical transducer and an end surface of said vibration friction portion, whereby moving the moving member in the expansion/contraction direction of the electro-mechanical transducer. The driving method includes subjecting the electro-mechanical transducer to reciprocating displacement in a sawtooth waveform and transferring the reciprocating displacement of the electro-mechanical transducer to the vibration friction portion through the vibration transfer member, thereby linearly driving the moving member in a predetermined direction.

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Sagae, Japan

Takahiro Suzuki