Fingerprint-sensing apparatus

A fingerprint-sensing apparatus, comprising:

• a fingerprint-sensing pixel array having a plurality of fingerprint-sensing pixel columns, wherein each of the fingerprint-sensing pixel columns comprises a plurality of fingerprint-sensing pixels, and each of the fingerprint-sensing pixels comprises:
• a scanning switch controlled by a row scanning signal to be turned on or off;
• and
• a thermosensitive current generation circuit generating a thermosensitive current according to the fingerprint-sensing pixel corresponding to a fingerprint ridge or a fingerprint valley, wherein the thermosensitive current generation circuit comprises:
• a transistor, wherein the transistor has a first terminal, a second terminal, and a control terminal, the first terminal of the transistor is coupled to the scanning switch, and the control terminal of the transistor is configured to receive a bias voltage;
• and
• a thermistor, wherein the thermistor has a first terminal and a second terminal, the first terminal of the thermistor is coupled to the second terminal of the transistor, and the first terminal of the thermistor is coupled to a system low voltage;
• and
• a plurality of read-out circuits respectively coupled to the fingerprint-sensing pixel columns, wherein each of the read-out circuits receives the thermosensitive current provided by the fingerprint-sensing pixel corresponding to the scanning switch that is turned on via the scanning switch and generates a fingerprint-sensing signal according to the thermosensitive current,
• wherein the scanning switches of the fingerprint-sensing pixels in a same row of the fingerprint-sensing pixel array are controlled by the same row scanning signal.