| 摘要 |
<p>Disclosed is a semiconductor fingerprint sensing apparatus with a shielding unit for sensing an inherent pattern of a fingerprint by using minute difference of fingerprint impedance. This fingerprint sensing apparatus has the shielding unit between a charge supplying unit and a sensing electrode to prevent DC current from being directly applied to the human body through the sensing electrode. The fingerprint sensing apparatus also has a discharging unit for compulsorily discharging charges residual in the shielding unit and the sensing electrode, so the sensing electrode may be always charged at a regular level.</p> |
