公开(公告)号：US11580770B1

公开(公告)日：2023-02-14

申请号：US17443936

申请日：2021-07-28

Applicant: QUALCOMM Incorporated

Inventor： Rakesh Pallerla ,  Hrishikesh Vijaykumar Panchawagh ,  Prakash Tiwari ,  Naga Chandan Babu Gudivada

IPC: G06V40/13 ,  G06K9/00 ,  B06B1/06 ,  H04M1/02

Abstract: Apparatuses, systems, and methods are provided for ultrasonic fingerprint sensors that are able to be used to detect fingerprints from opposing sides of an apparatus, e.g., a smartphone with screens on both sides of the housing. Some implementations of such sensors may include, for example, two piezoelectric and sensor pixel layer assemblies coupled to a common controller. Other implementations of such sensors may include, for example, a single piezoelectric and sensor pixel assembly coupled with a controller configured to apply a range-gate delay to obtain fingerprint scans from either opposing side of an apparatus. Yet further implementations of such sensors may include acoustic masking layers to spatially filter ultrasonic waves propagating to either side of an apparatus.