Electronic device including device ground coupled finger coupling electrode and array shielding electrode and related methods
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United States of America Patent
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Feb 28, 2017
Grant Date -
Nov 28, 2013
app pub date -
May 3, 2013
filing date -
May 4, 2012
priority date (Note) -
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Abstract
An electronic device may include a housing and circuitry carried by the housing and having a device ground associated therewith. The electronic device may also include an array of biometric finger sensing pixel electrodes and an array shielding electrode outside the array of biometric finger sensing pixels. A finger coupling electrode may be outside the array shielding electrode and coupled to the device ground. The electronic device may also include drive circuitry capable of generating a drive signal for the array of biometric finger sensing pixel electrodes and a compensating drive signal for the array shielding electrode.
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