Method for finger recognition and finger recognition device

A fingerprint recognition device, comprising:

• a touch panel;
• a fingerprint sensor;
• a touch sensor coupled to the touch panel to sense a touch position of the touch panel;
• a host controller coupled to the touch sensor;
• and
• a fingerprint readout device coupled to the fingerprint sensor and the host controller,
• wherein the fingerprint readout device determines a fingerprint readout zone according to the fingerprint position and performs a fingerprint sensing operation according to the fingerprint readout zone, to obtain a fingerprint image to be determined corresponding to the fingerprint readout zone;
• the host controller performs a fingerprint recognition operation according to the fingerprint image to be determined;
• one of the host controller and the fingerprint readout device generates at least one first position of the touch panel according to the touch position of the touch panel and a fingerprint matching information in response to the host controller determines that the fingerprint recognition operation is not successful;
• the fingerprint readout device determines an updated fingerprint readout zone according to the at least one first position, and performs the fingerprint sensing operation according to the updated fingerprint readout zone.