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:
Apr. 07, 2020
Filed:
May. 02, 2019
Applicant:
Pixart Imaging Inc., Hsin-Chu County, TW;
Inventors:
Zi-Hao Tan, Penang, MY;
Kevin Len-Li Lim, Penang, MY;
Assignee:
PIXART IMAGING INC., Hsin-Chu County, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 3/038 (2013.01); G06F 3/0354 (2013.01); G06F 3/03 (2006.01); G01P 15/03 (2006.01); G01P 15/08 (2006.01);
U.S. Cl.
CPC ...
G06F 3/0383 (2013.01); G01P 15/032 (2013.01); G06F 3/0312 (2013.01); G06F 3/03543 (2013.01); G01P 15/0891 (2013.01);
Abstract
A navigation device including an image sensor, a processor and a memory is provided. The memory stores a lookup table of a plurality of moving speeds each corresponding to one frame period. The image sensor captures image frames successively. The processor calculates a current speed according to a current image frame and a previous image frame, reads a frame period from the lookup table according to the calculated current speed, wherein the read frame period is multiplied by a ratio, which is smaller than 1, when an acceleration is confirmed by the processor according to the captured image frames.