FINGERPRINT SENSOR AND SENSING METHOD THEREOF
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United States of America Patent
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Issued Date -
Oct 6, 2016
app pub date -
Aug 3, 2015
filing date -
Apr 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, an insulating surface disposed on the sensing array, a readout module, and a processor. The sensing array includes a plurality of sensing units disposed in a plurality of row lines and a plurality of column lines, wherein each of the sensing units includes a sensing electrode. The transmitting electrode transmits a modulating signal. The readout module obtaining a sensing voltage corresponding to the modulating signal coupled to a finger of the user via the sensing electrode of the sensing unit when the user places the finger on the insulating surface and the modulating signal transmitted by the transmitting electrode is coupled to the finger of the user. The processor obtains the fingerprint information according to the sensing voltage.
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