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:
Sep. 30, 2008
Filed:
Jul. 01, 2005
Shima Okada, Osaka, JP;
Yoshihisa Fujiwara, Uji, JP;
Yasushi Yamamoto, Hirakara, JP;
Fumiiki Yoneda, Moriguchi, JP;
Shima Okada, Osaka, JP;
Yoshihisa Fujiwara, Uji, JP;
Yasushi Yamamoto, Hirakara, JP;
Fumiiki Yoneda, Moriguchi, JP;
Sanyo Electric Co. Ltd., Moriguchi-shi, JP;
Abstract
A sleep state of a subject is estimated from respiration signals that are readily detected without restraining the subject. From a voltage waveform based on respiratory movement of a person, positive peak values and the (time) interval between adjacent peaks are calculated. Also obtained is the area of a region that is enclosed by the voltage waveform and a time axis between peaks, and the average value and dispersion value of the obtained inter-peak areas are calculated. The calculated values are used to set a preliminary sleep state value for a given period, and sleep state values over plural periods are factored in to estimate a sleep state at a given time point.