SYSTEMS AND METHODS FOR SENSING PRESSURE IN TOUCH SENSITIVE DEVICES
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United States of America Patent
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Jan 26, 2017
app pub date -
Jul 1, 2016
filing date -
Jul 1, 2015
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Abstract
A touch sensitive device, comprising touch interface comprising rows and columns, a signal generator for generating a plurality of unique orthogonal signals on at least a plurality of the rows, respectively, capacitive sensors on at least a plurality of the columns for sensing changes in the amount of capacitive coupling between the rows and the columns on the touch interface, and a touch processor for identifying a pressure of touch on the touch interface by processing the amount of pressure applied to the touch interface based on the capacitive coupling. Methods for inferring contact pressure, calculating an inferred touch pressure, and calculating a single gradient value are also presented.
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