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:
Oct. 06, 2015
Filed:
Aug. 22, 2013
Applicant:
Pixart Imaging Inc., Hsin-Chu, TW;
Inventors:
Assignee:
PIXART IMAGING INC., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 3/044 (2006.01); G06F 3/041 (2006.01); G06F 3/042 (2006.01); G06F 3/0354 (2013.01);
U.S. Cl.
CPC ...
G06F 3/0416 (2013.01); G06F 3/03547 (2013.01); G06F 3/042 (2013.01); G06F 3/044 (2013.01); G06F 2203/04104 (2013.01);
Abstract
A multipoint positioning method for a touchpad including the steps of: scanning a touchpad to retrieve two-dimensional data; calculating an object area and a number of maxima of local maxima in the two-dimensional data; comparing the object area with an area threshold when the number of maxima is larger than 1; and identifying positions of the local maxima as a plurality of contact positions when the object area is larger than or equal to the area threshold.