Patent ID: 11915508
Assignee: QUALCOMM INCORPORATED
Field: Telecommunications (Electrical engineering)
Classification: CPC G  H | IPC B  G  H

Claim 10:
11. A method comprising:
causing a portion of a first ultrasonic fingerprint sensing system including a first sensor pixel layer, a first piezoelectric layer, and a first electrode layer to generate a first ultrasonic wave, wherein the first ultrasonic fingerprint sensing system is part of an apparatus;
causing a portion of a second ultrasonic fingerprint sensing system including a second sensor pixel layer, a second piezoelectric layer, and a second electrode layer to generate a second ultrasonic wave, wherein the second ultrasonic fingerprint sensing system is also part of the apparatus; and
causing a single common controller to:
cause first sensor pixels in the first sensor pixel layer to measure amounts of charge generated within the first piezoelectric layer responsive to transit of reflected portions of the first ultrasonic wave therethrough,
cause second sensor pixels in the second sensor pixel layer to measure amounts of charge generated within the second piezoelectric layer responsive to transit of reflected portions of the second ultrasonic wave therethrough,
obtain a fingerprint scan from a first side of the apparatus by scanning the first sensor pixels for measured charge amounts, and
obtain a fingerprint scan from a second side of the apparatus opposite the first side of the apparatus by scanning the second sensor pixels for measured charge amounts, wherein:
the first and second ultrasonic fingerprint sensing systems are in an apparatus,
at least the first sensor pixel layer and the second sensor pixel layer are both operatively connected with the single common controller,
the portion of the first ultrasonic fingerprint sensing system is located proximate to the first side of the apparatus, and
the portion of the second ultrasonic fingerprint sensing system is located proximate to the second side of the apparatus opposite the first side of the apparatus.