Fingerprint sensor and driving method thereof
A fingerprint sensor and sensing electrode technology, applied in the direction of acquiring/arranging fingerprints/palmprints, instruments, characters and pattern recognition, etc., can solve the problems of difficult manufacturing process, difficult mass production, high power consumption, etc. The effect of high difficulty, reduced power consumption, and simplified manufacturing process
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[0031] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for ease of description, the drawings only show a part but not all of the structure related to the present invention.
[0032] Figure 1a Shown is a schematic structural diagram of a fingerprint sensor provided by an embodiment of the present invention, see Figure 1a , The fingerprint sensor specifically includes:
[0033] Chip 100;
[0034] The driving element 200 is used to emit an ultrasonic signal when it is turned on;
[0035] The piezoelectric element 300 is arranged on one surface of the chip 100 and is used to convert the ultrasonic signal reflected by the target finger into electric charge;
[0036] A plurality of pixel units are arranged in an array. Each pixel unit incl...
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