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

Claim 0:
1. An apparatus comprising:
a portion of a first ultrasonic fingerprint sensing system including:
a first sensor pixel layer,
a first piezoelectric layer, and
a first electrode layer,

a portion of a second ultrasonic fingerprint sensing system including:
a second sensor pixel layer,
a second piezoelectric layer, and
a second electrode layer; and

a single common controller, wherein:
the first sensor pixel layer includes a plurality of first sensor pixels, each first sensor pixel configured to, in conjunction with the first electrode layer, measure an amount of charge generated within the first piezoelectric layer responsive to transit of an ultrasonic wave therethrough,
the second sensor pixel layer includes a plurality of second sensor pixels, each second sensor pixel configured to, in conjunction with the second electrode layer, measure an amount of charge generated within the second piezoelectric layer responsive to transit of an ultrasonic wave therethrough,
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 a first side of the apparatus,
the portion of the second ultrasonic fingerprint sensing system is located proximate to a second side of the apparatus opposite the first side of the apparatus, and
the single common controller is configured to:
cause the first sensor pixel layer to obtain a fingerprint scan from the first side of the apparatus by scanning the first sensor pixels for measured charge amounts, and
cause the second sensor pixel layer to obtain a fingerprint scan from the second side of the apparatus by scanning the second sensor pixels for measured charge amounts.