Systems and methods for capacitive sensing of objects
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United States of America Patent
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Issued Date -
Jan 30, 2014
app pub date -
Jul 26, 2013
filing date -
Jun 20, 2008
priority date (Note) -
Abandoned
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Abstract
Systems and methods for capacitive sensing of objects in a summation mode and a non-summation mode. A dual mode capacitive sensing system comprises a capacitive sensor and a processor. The capacitive sensor has a pair of adjacent conducting pads including a first conducting pad and a second conducting pad. The processor has a pair of input/output channels respectively coupled to the first and second conducting pads. The processor is configured to measure capacitance of the capacitive sensor in a summation mode and in a differential mode. A capacitive object sensing system comprises a capacitive sensor, a processor, and a plurality of objects each configured to have a unique capacitance. The processor is configured to identify one of the playing pieces based on the sensor capacitance measured when the one of the playing pieces is set on the capacitive sensor.
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