The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 2017
Filed:
Jun. 30, 2016
Qualcomm Incorporated, San Diego, CA (US);
Meir Agassy, Ramat Gan, IL;
Gal Rotem, Hod Hasharon, IL;
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Embodiments of correcting diffraction effects in an ultrasonic sensor are disclosed. In one embodiment, an ultrasonic sensor may include an ultrasonic transmitter configured to transmit an ultrasonic wave, a piezoelectric receiver layer configured to receive a reflected wave of the ultrasonic wave, where the reflected wave comprises a plurality of images of a fingerprint having a plurality of phases in a time sequence, and a platen layer configured to protect the ultrasonic transmitter and the piezoelectric receiver layer. The ultrasonic sensor may further include an ultrasonic sensor array and a processor configured to sum the plurality of images multiplied by a complex phase exponential to form an integrated complex image, align the integrated complex image to a pre-selected phase to form an aligned complex image, determine a maximum energy phase using the aligned complex image, and compute a maximum energy image to represent the fingerprint based at least in part on the aligned complex image at the maximum energy phase.