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:
Sep. 12, 2017
Filed:
Nov. 07, 2012
Applicant:
Cypress Semiconductor Corporation, San Jose, CA (US);
Inventors:
Jonathan R. Peterson, Everett, WA (US);
Robert Michael Birch, Seattle, WA (US);
Assignee:
CYPRESS SEMICONDUCTOR CORPORATION, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 3/041 (2006.01); G06F 3/044 (2006.01); H03K 17/96 (2006.01);
U.S. Cl.
CPC ...
G06F 3/041 (2013.01); G06F 3/044 (2013.01); G06F 3/0416 (2013.01); H03K 17/9622 (2013.01); H03K 2217/960775 (2013.01);
Abstract
A method and apparatus varying, by interval, a frequency of a drive signal applied to one electrode of each of a plurality of electrode pairs, select a frequency corresponding to the frequency of the drive signal, monitor changes in capacitance of each of the electrode pairs through receive signals at the selected frequency, from the other electrode of each of the plurality of electrode pairs; and determine a position of at least two objects, which are simultaneously on a touch device, according to the monitored capacitance changes.