Method for ultrasonic fingerprint identification, ultrasonic fingerprint apparatus, and electronic device

An ultrasonic fingerprint apparatus, being arranged below a screen of an electronic device to implement under-display ultrasonic fingerprint identification, the ultrasonic fingerprint apparatus comprising:

• a processing module configured to:
• acquire a correspondence between a plurality of temperatures and a plurality of parameter groups, wherein each of the parameter groups comprises at least one of:
• a frequency of an ultrasonic signal transmitted to a finger above the screen, a number of collections of an ultrasonic fingerprint signal carrying fingerprint information returned from the finger, and a delay of a collection moment of the ultrasonic fingerprint signal with respect to a transmission moment of the ultrasonic signal;
• and
• determine, when the finger presses the screen, a target parameter group among the plurality of parameter groups based on a current first temperature and the correspondence;
• and
• a detection module configured to perform fingerprint identification based on parameters in the target parameter group.

An electronic device, comprising:

• a screen;
• and
• an ultrasonic fingerprint apparatus, arranged below the screen to implement under-display ultrasonic fingerprint identification and comprising:
• a processing module configured to:
• acquire a correspondence between a plurality of temperatures and a plurality of parameter groups, wherein each of the parameter groups comprises at least one of:
• a frequency of an ultrasonic signal transmitted to a finger above the screen, a number of collections of an ultrasonic fingerprint signal carrying fingerprint information returned from the finger, and a delay of a collection moment of the ultrasonic fingerprint signal with respect to a transmission moment of the ultrasonic signal;
• and
• determine, when the finger presses the screen, a target parameter group among the plurality of parameter groups based on a current first temperature and the correspondence;
• and
• a detection module configured to perform fingerprint identification based on parameters in the target parameter group.