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:
May. 03, 2016
Filed:
Jul. 05, 2013
Applicant:
Pixart Imaging Inc., Hsin-Chu County, TW;
Inventor:
Willie Song, Penang, MY;
Assignee:
Pixart Imaging Inc., Hsin-Chu County, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 3/033 (2013.01); G06F 3/0354 (2013.01); G06F 3/03 (2006.01); G06F 3/038 (2013.01);
U.S. Cl.
CPC ...
G06F 3/03543 (2013.01); G06F 3/0317 (2013.01); G06F 3/0383 (2013.01);
Abstract
A navigation device includes an image sensor, a memory unit and a processing unit. The image sensor is configured to capture an image frame of a work surface. The memory unit previously saves a lookup table including surface quality profiles of different surface categories. The processing unit is configured to calculate surface qualities of the work surface associated with different quality thresholds and to compare the surface qualities with the lookup table to determine the surface category of the work surface thereby selecting a tracking strategy associated with the surface category of the work surface.