Fingerprint Sensing Device And Fingerprint Sensing Method Thereof
A sensing device and sensing method technology, applied in the direction of acquiring/arranging fingerprints/palmprints, instruments, characters, and pattern recognition, etc., can solve problems such as difficult to correctly identify lines, affect electrode plate sensing, etc., and achieve large signal Dynamic range, prevention of operation noise interference, effects of eliminating parasitic capacitance effects
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[0043] figure 2 is an embodiment of the fingerprint sensing device 22 of the present invention, which is compatible with figure 1 The fingerprint sensing device 10 also includes a protective layer 12, an electrostatic discharge layer 14, electrode plates 16a, 16b, 16c and detection circuits 18a, 18b, 18c. In addition, the fingerprint sensing device 22 also includes barrier plates 24a, 24b, 24c and switches SWse, SWsp, wherein the barrier plate 24a is between the electrode plate 16a and the detection circuit 18a, and the barrier plate 24b is between the electrode plate 16b and the detection circuit 18b , the barrier plate 24c is between the electrode plate 16c and the detection circuit 18c, one end of the switch SWse is connected to the barrier plates 24a, 24b, 24c, the other end of the switch SWse receives the voltage VR1, and one end of the switch SWsp is connected to the barrier plates 24a, 24b, 24c, The other end of the switch SWsp receives the voltage VR2. In the finger...
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