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. 12, 2016
Filed:
Dec. 09, 2013
Applicant:
Pixart Imaging Inc., Hsin-Chu County, TW;
Inventors:
Willie Song, Penang, MY;
Kevin Len-Li Lim, Pulau Pinang, 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); A63F 13/213 (2014.01);
U.S. Cl.
CPC ...
G06F 3/0383 (2013.01); A63F 13/213 (2014.09); G06F 3/03543 (2013.01); G06F 2203/0381 (2013.01);
Abstract
A displacement detection device includes an image sensor, a processing unit and an output unit. The image sensor is configured to detect reflected light from a working surface to successively output image frames. The processing unit is configured to identify a hovering height and calculate a first axis displacement and a second axis displacement according to the image frames. The output unit is controlled by the processing unit to output a first ratio of the first axis displacement but not to output the second axis displacement when the hovering height is higher than a predetermined height.