公开(公告)号：US20180349663A1

公开(公告)日：2018-12-06

申请号：US15611704

申请日：2017-06-01

Applicant: InvenSense, Inc.

Inventor： Bruno W. GARLEPP ,  Michael H. PERROTT ,  Michael DANEMAN ,  James Christian SALVIA ,  Nikhil APTE

IPC: G06K9/00

CPC classification number: G06K9/0002

Abstract: A method for generating an image is provided. The method comprises capturing a first set of image pixels by an ultrasonic sensor comprising an array of ultrasonic transducers using a first beamforming pattern, wherein the first beamforming pattern comprises a first pattern of transmit signals routed to a plurality of ultrasonic transducers of the ultrasonic sensor. The method further comprises capturing a second set of image pixels at the ultrasonic sensor using a second beamforming pattern, wherein the second beamforming pattern comprises a second pattern of transmit signals routed to the plurality of ultrasonic transducers. The second beamforming pattern is different than the first beamforming pattern. The second set of image pixels corresponds to an edge region of the ultrasonic sensor. The method additionally comprises combining the first set of image pixels and the second set of image pixels to form the image. An electronic device and a method of generating an image of a fingerprint with a fingerprint sensor are also provided.

公开(公告)号：US20170328870A1

公开(公告)日：2017-11-16

申请号：US15589921

申请日：2017-05-08

Applicant: InvenSense, Inc.

Inventor： Bruno W. GARLEPP ,  Michael H. PERROTT ,  James Christian SALVIA

IPC: G01N29/34 ,  G11C19/28 ,  H01L41/047 ,  G11C19/38 ,  H03K17/96 ,  H01L41/113

CPC classification number: G01N29/34 ,  B06B1/0629 ,  G01N2291/106 ,  G10K11/346 ,  G11C19/287 ,  G11C19/38 ,  H01L41/047 ,  H01L41/1132 ,  H03K17/9643

Abstract: In a method of using an ultrasonic sensor comprising a two-dimensional array of ultrasonic transducers, a plurality of ultrasonic signals are transmitted according to a beamforming pattern at a position of the two-dimensional array. The beamforming pattern focuses the plurality of ultrasonic signals to location above the two-dimensional array, wherein the beamforming pattern identifies ultrasonic transducers of the two-dimensional array that are activated during transmission of the ultrasonic signals, and wherein at least some ultrasonic transducers of the beamforming pattern are phase delayed with respect to other ultrasonic transducers of the beamforming pattern. At least one reflected ultrasonic signal is received at the position according to a receive pattern, wherein the receive pattern identifies at least one ultrasonic transducers of the two-dimensional array that is activated during the receiving. The transmitting and the receiving are repeated at a plurality of positions of the two-dimensional array.