HYBRID DETECTION FOR A CAPACITANCE INPUT DEVICE
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United States of America Patent
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Issued Date -
Sep 29, 2016
app pub date -
Mar 27, 2015
filing date -
Mar 27, 2015
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Abstract
A processing system for hybrid detection includes a sensor module and a determination module. The sensor module is coupled to sensor electrodes, and is configured to drive a first subset of sensor electrodes with transmitter signals, and receive, based on the transmitter signals, first resulting signals from a second subset of the sensor electrodes. The sensor module is further configured to receive second resulting signals from the second subset while the second subset are driven with modulated signals. The determination module is configured to determine a set of contiguous regions based on the first resulting signals, determine a number of unmatched contiguous regions in the set of contiguous regions based on measurements processed from the second resulting signals, and change an operating mode when the number of unmatched contiguous regions satisfies a threshold number.
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