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:
Aug. 28, 1990
Filed:
Feb. 11, 1988
Applicant:
Inventors:
Norihito Yamamoto, Shiga, JP;
Takahide Tanaka, Kyoto, JP;
Assignee:
Omron Tateisi Electronics Co., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
364569 ; 340575 ; 340576 ;
Abstract
A doze detector detects when the user begins to go to sleep, by detecting the blinks of the user's eye, regardless of the position of the iris, using at least two reflection type sensors. A blink is determined to have occurred only when both light detecting elements detect a blink. The number and/or duration of the blinks is then used to determine whether the user is beginning to doze. An alarm can then be produced to prevent the user from going to sleep.