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:
Jun. 30, 2015
Filed:
Sep. 26, 2014
Amazon Technologies, Inc., Seattle, WA (US);
Jung Bae Sohn, Sunnyvale, CA (US);
David William Devries, San Jose, CA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
A system for determining and correcting a calculated orientation of a computing device based on data from an accelerometer and a gyroscope. The system compares a predicted direction of gravity in a predicted frame of the device with a measured direction of gravity in a sensor frame of the device, and determines an angle of the difference between the directions. A correction is calculated to rotate the predicted frame around an axis by the angle relative to a sensor frame, the axis being perpendicular to both the predicted and measured directions of gravity. A predicted orientation of a reference 'Earth' frame relative to the predicted frame is calculated based on the gyroscope data. A corrected orientation is determined by applying the correction to the predicted orientation, providing an orientation of the Earth reference frame relative to the sensor frame.