Patent ID: 10592723

Abstract:
A fingerprint-sensing apparatus is provided. The fingerprint-sensing apparatus includes a fingerprint-sensing pixel array and a plurality of read-out circuits. The fingerprint-sensing pixel array has a plurality of fingerprint-sensing pixel columns, and each of the plurality of fingerprint sensing pixel columns includes a plurality of fingerprint-sensing pixels. Each of the plurality of fingerprint-sensing pixels includes a scanning switch and a thermosensitive current generation circuit. The scanning switch is controlled by a row scanning signal. The thermosensitive current generation circuit generates a thermosensitive current according to the fingerprint-sensing pixel corresponding to a fingerprint ridge or a fingerprint valley. The plurality of read-out circuits is respectively coupled to the plurality of fingerprint-sensing pixel columns. The read-out circuits receive the thermosensitive current provided by the fingerprint-sensing pixels and generate a fingerprint-sensing signal according to the thermosensitive current.