公开(公告)号：US10965920B2

公开(公告)日：2021-03-30

申请号：US16449981

申请日：2019-06-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Naoya Kitade ,  Makoto Iyoda ,  Naoko Yamashita ,  Manabu Chikayama ,  Atsushi Kubo

IPC: H04N9/31 ,  G11B33/14 ,  G03B21/16 ,  G03B21/00 ,  G11B33/12 ,  G03B21/20

Abstract: A drive device includes a housing in which a gas is sealed, wherein density of the gas is lower than density of air, a driven object housed inside the housing, a driver configured to drive the driven object, a current detector configured to detect a value of a current flowing into the driver, and a determinator configured to determine a concentration of the gas inside the housing based on the value of the current detected.