08040142 is referenced by 89 patents and cites 306 patents.

A technique for recognizing and rejecting false activation events related to a capacitance sense interface includes measuring a capacitance value of a capacitance sensor within the capacitance sense interface to generate a measured capacitance value. The measured capacitance value is analyzed to determine a baseline capacitance value for the capacitance sensor. The baseline capacitance value may be updated based at least in part upon a weighted moving average of the measured capacitance value. The measured capacitance value may also be analyzed to determine whether the capacitance sensor was activated during a startup phase and to adjust the baseline capacitance value in response to determining that the capacitance sensor was activated during the startup phase.

Title
Touch detection techniques for capacitive touch sense systems
Application Number
11/729818
Publication Number
8040142 (B1)
Application Date
March 28, 2007
Publication Date
October 18, 2011
Inventor
Dennis R Seguine
Monroe
WA, US
Andrew C Page
Mukilteo
WA, US
Louis W Bokma
Newark
CA, US
Assignee
Cypress Semiconductor Corporation
CA, US
IPC
G01R 27/26
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