TOUCH DETECTION CIRCUIT, FINGERPRINT MODULE AND CONTROL METHOD THEREOF
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United States of America Patent
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Sep 14, 2017
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Jun 27, 2016
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Abstract
A fingerprint module includes a fingerprint sensor, a metal decorative part, a touch detection circuit, and a processing unit. The touch detection circuit generates a first trigger signal when the metal decorative part is touched; the processing unit is connected to the touch detection circuit and the fingerprint sensor; the processing unit generates a finger touch signal when the first trigger signal generated by the touch detection circuit and/or the fingerprint sensing signal generated by the fingerprint sensor is received. The present application also provides a control method of fingerprint module. In the present application, the metal decorative part and the fingerprint sensor are cooperatively used for performing a joint detection and the overall detection range of the fingerprint module is increased, thereby reducing the detection blind area of a finger and improving the detection accuracy of the fingerprint module for realizing a touch detection function.
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