Fingerprint detection apparatus and method
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United States of America Patent
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Feb 13, 2018
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N/A
app pub date -
Oct 11, 2014
filing date -
Sep 4, 2014
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Abstract
A fingerprint detection apparatus and a fingerprint detection method employ a collection module and a processing module. The collection module is configured to collect fingerprint information and generate a fingerprint detection signal. The processing module is configured to process the fingerprint detection signal and generate fingerprint image data, and includes a frequency mixer. The frequency mixer is configured to perform quadrature mixing and low pass filtering on the fingerprint detection signal, and to convert an alternating current signal of the fingerprint detection signal into a direct current signal. Therefore, the bandwidth of the fingerprint detection signal can be decreased, noises in the fingerprint detection signal can be filtered out, the signal to noise ratio can be improved, the fingerprint detection sensitivity can be enhanced, and the anti-interference capacity can be increased, so that the adaptability of the fingerprint detecting apparatus to an application environment can be improved.
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