The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 2024
Filed:
Nov. 06, 2023
Yazaki Corporation, Tokyo, JP;
Kenichi Nagahashi, Susono, JP;
Jungang Guan, Susono, JP;
YAZAKI CORPORATION, Tokyo, JP;
Abstract
A drowsiness detection device includes, an imaging unit, a PERCLOS calculation unit, a drowsiness detection unit, and a threshold value setting unit. The PERCLOS calculation unit calculates, based on an image imaged by a camera, a PERCLOS that is a time period ratio during which a driver closes the eye within a certain time period. The drowsiness detection unit detects drowsiness of the driver when the PERCLOS is equal to or larger than a threshold value. When an initial PERCLOS first calculated from a start of driving is less than a %, the threshold value setting unit sets the threshold value to be smaller than in a case that the initial PERCLOS is equal to or larger than a %.