公开(公告)号：US20230157629A1

公开(公告)日：2023-05-25

申请号：US17632630

申请日：2021-06-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki NISHIKAWA ,  Seiya HIGUCHI ,  Yu SAKATA ,  Masahiro TANIKAWA ,  Kyohei KOIZUMI

IPC: A61B5/00 ,  F24F11/66

CPC classification number: A61B5/4809 ,  F24F11/66 ,  F24F2120/12

Abstract: A sleep onset determination method includes: detecting a light-out time that is a time at which illuminance in a room becomes less than or equal to a predetermined value; storing the light-out time detected in the detecting of the light-out time and a time period including the light-out time detected; and determining whether a user fell asleep at a currently detected light-out time, based on the light-out time and the time period stored in the storing of the light-out time.