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:
Oct. 25, 2011
Filed:
Feb. 12, 2008
Kenji Ishida, Nagoya, JP;
Kahori Uchiyama, Nisshin, JP;
Teiyuu Kimura, Nisshin, JP;
Noriyuki Ozaki, Kariya, JP;
Kenji Ishida, Nagoya, JP;
Kahori Uchiyama, Nisshin, JP;
Teiyuu Kimura, Nisshin, JP;
Noriyuki Ozaki, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A sleep prevention system captures a facial image of a driver, determines a sleepiness level from the facial image and operates warning devices including neck air conditioner, seatbelt vibrator, and brake controller if necessary based on the sleepiness determination. A sleepiness determination device determines sleepiness from facial expression information such as distances between corners of a mouth, distance between an eyebrow and eye, tilt angle of a head, and other facial feature distances. The facial distances are calculated from captured images and from reference information gather during wakefulness. The sleepiness degree is determined based on the determination results including combinations thereof.