Fingerprint recognizing sensor with fast recognition

A fingerprint recognizing sensor with fast recognition, comprising:

• a substrate;
• a plurality of fingerprint recognition sensing units arranged on the substrate, each of the fingerprint recognition sensing units comprising:
• a conductive plate arranged on the substrate;
• a passivation layer arranged on the conductive plate for receiving a finger to detect a fingerprint;
• a charging capacitor, comprising a discharging end electrically connected to a low level voltage, and a charging end electrically connected to the conductive plate;
• a switch group, comprising a first switch and a second switch, two ends of the first switch being electrically connected to an input voltage and the charging end of the charging capacitor, respectively, and located between the input voltage and the charging end of the charging capacitor, to control the input voltage to charge the charging capacitor;
• two ends of the second switch being electrically connected to the conductive plate and the first switch as well as the charging end of the charging capacitor, respectively;
• the input voltage being higher than the low level voltage;
• and
• an analog to digital (AD) converter electrically connected to the charging end of the charging capacitor in each of the fingerprint recognition sensing units;
• wherein after the first switch in each of the fingerprint recognition sensing units controls the charging capacitor to perform charging for a single time, the second switch controls the charging capacitor to perform charge sharing for multiple times, and the AD converter outputs a fingerprint recognizing signal according to a residual voltage at the charging end after the charge sharing.