The present invention proposes an electric field type fingerprint authentication device, a state control method thereof, and a prosthesis authentication method. The electric field type fingerprint authentication device includes a signal collection module and a signal processing module. When the measurement state signal processing unit is electrically connected to the signal acquisition unit, the measurement wait state signal processing unit is electrically connected to at least one signal acquisition unit around at least the measurement state signal acquisition unit. Coordinates the charging / discharging process of the measurement state signal processing unit and the sensing capacitor electrically connected to the measurement waiting state signal processing unit, and measures the parasitic capacitance between the measurement state signal collecting unit and the measurement waiting state signal collecting unit Reduce the charge / discharge amount. The present invention is simple in structure, saves parts cost, avoids the mutual interference problem between signal collection units, and the fingerprint authentication apparatus is suitable for various application requirements. The present invention can further discriminate fingerprints of the fingers of the prosthesis and improve the security and reliability of the fingerprint authentication device.本発明は、電界型指紋認証装置及びその状態制御方法、プロテーゼ認証方法を提案する。上記の電界型指紋認証装置は、信号収集モジュールと信号処理モジュールとを含む。測定状態信号処理ユニットが信号収集ユニットと電気的接続された場合に、測定待ち状態信号処理ユニットが少なくとも測定状態信号収集ユニットの周辺の少なくとも一つの信号収集ユニットと電気的に接続される。測定状態信号処理ユニットと、測定待ち状態信号処理ユニットと電気的に接続されるセンシングコンデンサとの充放電過程を協調し、測定状態信号収集ユニットと測定待ち状態信号収集ユニットとの間の寄生容量の充放電量を抑える。本発明は、構造が簡単で、部品コストを節約し、信号収集ユニット間の相互干渉の問題を回避し、上記の指紋認証装置は様々な応用要求に適する。本発明は、さらにプロテーゼの指の指紋を判別でき、指紋認証装置のセキュリティ性と確実性を向上する。
