Capacitive sensing apparatus with a shield electrode
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United States of America Patent
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Aug 16, 2016
Grant Date -
Jul 3, 2014
app pub date -
Jan 3, 2013
filing date -
Jan 3, 2013
priority date (Note) -
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Abstract
An apparatus including a plurality of capacitive sensing cells distributed over a sensing area, wherein each capacitive sensing cell includes a capacitive sensor electrode and at least one switch; a plurality of output conductive traces, wherein each output conductive trace is configured to provide an output from multiple capacitive sensing cells; a plurality of control conductive traces, wherein each control conductive trace is configured to provide a control input to multiple capacitive sensing cells, wherein the switch of a capacitive sensing cell is configured to be controlled by one of the plurality of control conductive traces to enable a conductive path between the capacitive sensor electrode of the capacitive sensing cell and one of the plurality of output conductive traces; and a shield electrode overlying at least portions of the output conductive traces or the control conductive traces while exposing at least portions of the capacitive sensor electrodes.
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