Touch sensor and associated control method for decreased capacitive loads
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United States of America Patent
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Jul 7, 2020
Grant Date -
N/A
app pub date -
Aug 15, 2019
filing date -
Jan 8, 2016
priority date (Note) -
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Abstract
A device includes a controller coupled to a touch sensor. The touch sensor includes a first array of capacitive nodes substantially aligned with a second array of capacitive nodes in a mechanical stack. The controller is configured, when in a self-capacitive mode of operation, to send a first drive signal to a plurality of the electrodes of the first array, send a shield signal to at least a portion of the electrodes of the second array at the same time as the first drive signal is sent to the plurality of electrodes of the first array, and sense touch inputs based on signals received from the plurality of electrodes of the first array while the first drive signal is being sent to the plurality of electrodes of the first array and the shield signal is being sent to the at least a portion of the electrodes of the second array.
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