公开(公告)号：US20220058357A1

公开(公告)日：2022-02-24

申请号：US16947883

申请日：2020-08-21

Applicant: QUALCOMM Incorporated

Inventor： Changting XU ,  Soon Joon YOON ,  Camilo PEREZ SAAIBI ,  Hrishikesh Vijaykumar PANCHAWAGH ,  Kostadin Dimitrov DJORDJEV

IPC: G06K9/00 ,  G06F3/0487 ,  H01L41/113

Abstract: Some disclosed methods involve acquiring, via an ultrasonic sensor system, first (reference) ultrasonic signals at a first time and acquiring second ultrasonic signals via the ultrasonic sensor system at a second time. Such methods may involve determining, based at least in part on a comparison of the first ultrasonic signals and the second ultrasonic signals, whether one or more layers reside on the cover glass at the second time. If it is determined that the one or more layers reside on the cover glass at the second time, some methods may involve determining one or more signal characteristics corresponding to properties of the one or more layers and determining, based at least in part on the one or more properties, whether the one or more layers are compatible with the ultrasonic sensor system. If so, the method may involve calibrating the ultrasonic sensor system.

公开(公告)号：US20210056277A1

公开(公告)日：2021-02-25

申请号：US16545741

申请日：2019-08-20

Applicant: QUALCOMM Incorporated

Inventor： Jessica Liu STROHMANN ,  Hrishikesh Vijaykumar PANCHAWAGH ,  Yipeng LU ,  Soon Joon YOON ,  Kostadin Dimitrov DJORDJEV

IPC: G06K9/00 ,  G06F3/042

Abstract: A device and method for producing said device comprising an improved ultrasonic biometric sensor is disclosed. The ultrasonic biometric sensor is composed of a pixel array and multiple copolymer layers which are polarized in such a fashion as to increase the transmitting pressure and receiving sensitivity of the sensor. The copolymer layers may be polarized in the same direction, or in opposite directions, depending on the desired functionality.