公开(公告)号：US20180052055A1

公开(公告)日：2018-02-22

申请号：US15557570

申请日：2016-03-03

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHINJI IKEDA ,  KAZUHO SAKURAI

IPC: G01J5/00 ,  G01J5/52

CPC classification number: G01J5/0025 ,  G01J1/02 ,  G01J5/00 ,  G01J5/34 ,  G01J5/522 ,  G01J2005/0048

Abstract: A electronic device includes a pyroelectric element that senses a thermal change, a detector, and a controller. The detector detects the movement of the subject based on a detection signal output from the pyroelectric element. The controller sets detection sensitivity of the detector based on a result of the detection by the detector. The detection sensitivity is set to low sensitivity or high sensitivity. The controller sets the detection sensitivity to the high sensitivity when the detector has detected the movement of the subject. The controller sets the detection sensitivity to the low sensitivity when a predetermined period has elapsed without the detector detecting the movement of the subject in the state where detection sensitivity is the high sensitivity.