FINGERPRINT SENSOR AND SENSING METHOD THEREOF
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United States of America Patent
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Aug 4, 2016
app pub date -
Jul 2, 2015
filing date -
Feb 2, 2015
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Abstract
A fingerprint sensor is provided for sensing fingerprint information of a finger. The fingerprint sensor includes a sensing array, a readout module and a processor. The sensing array includes a plurality of sensing units. Each of the sensing units includes a sensing electrode. The readout module provides a sensing output according to a first sensing voltage from the sensing array and an average voltage of a plurality of second sensing voltages from the sensing array. The processor generates the fingerprint information of the finger according to the sensing output. The first sensing voltage is provided by the sensing electrode of a first sensing unit of the sensing units, and each of the second sensing voltage is provided by the sensing electrode of a second sensing unit of the sensing units. The second sensing units are neighboring to the first sensing unit.
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