TOUCH DETECTING DEVICE AND METHOD
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United States of America Patent
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Issued Date -
Jun 30, 2011
app pub date -
Aug 4, 2010
filing date -
Dec 24, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A touch detecting device for a capacitive touch sensor that includes a plurality of sensing units aligned along a predetermined direction, includes a differential detecting module and a processing module. The differential detecting module is configured to detect a capacitance variation between each two adjacent ones of the sensing units so as to generate a sequence of capacitance variations. The processing module is configured to determine a number of transitions corresponding to a number of touched areas on the capacitive touch sensor, where the number of transitions is one or greater. Each of the transitions represents a change from one of a set of the capacitance variations that is positive to one of a succeeding set of the capacitance variations that is negative. A touch detecting method is also disclosed.
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