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. 20, 2012
Filed:
Mar. 30, 2010
Miroslav Kobetski, Danderyd, SE;
Peter Blixt, Hagersten, SE;
Johnny Holmberg, Hallstahammar, SE;
John Mikael Holtz Elvesjo, Stockholm, SE;
Miroslav Kobetski, Danderyd, SE;
Peter Blixt, Hagersten, SE;
Johnny Holmberg, Hallstahammar, SE;
John Mikael Holtz Elvesjo, Stockholm, SE;
Tobii Technology AB, Danderyd, SE;
Abstract
A monitoring system monitors and/or predicts drowsiness of a driver of a vehicle or a machine operator. A set of infrared or near infrared light sources is arranged such that an amount of the light emitted from the light source strikes an eye of the driver or operator. The light that impinges on the eye of the driver or operator forms a virtual image of the signal sources on the eye, including the sclera and/or cornea. An image sensor obtains consecutive images capturing the reflected light. Each image contains glints from at least a subset or from all of the light sources. A drowsiness index can be determined based on the extracted information of the glints of the sequence of images. The drowsiness index indicates a degree of drowsiness of the driver or operator.