公开(公告)号：US11711067B2

公开(公告)日：2023-07-25

申请号：US16794099

申请日：2020-02-18

Applicant: InvenSense, Inc.

Inventor： Stefon Shelton ,  Andre Guedes ,  Richard Przybyla ,  Meng-Hsiung Kiang ,  David Horsley

IPC: H03H9/17 ,  B06B1/06 ,  H04R17/00 ,  H10N30/853 ,  H10N30/20 ,  H03H9/02 ,  H03H9/15

CPC classification number: H03H9/174 ,  B06B1/0603 ,  H03H9/02244 ,  H03H9/178 ,  H04R17/00 ,  H10N30/2047 ,  H10N30/853 ,  H10N30/8542 ,  H10N30/8554 ,  H03H2009/155

Abstract: A transducer includes first and second piezoelectric layers made of corresponding different first and second piezoelectric materials and three or more electrodes, implemented in two or more conductive electrode layers. The first piezoelectric layer is sandwiched between a first pair of electrodes and the second piezoelectric layer is sandwiched between a second pair of electrodes. The first and second pairs of electrodes contain no more than one electrode that is common to both pairs.

公开(公告)号：US11682228B2

公开(公告)日：2023-06-20

申请号：US17454796

申请日：2021-11-12

Applicant: InvenSense, Inc.

Inventor： Quy Chau ,  Mei-Lin Chan

IPC: G06V40/13 ,  G06V40/12 ,  G06V10/143

CPC classification number: G06V40/1306 ,  G06V10/143 ,  G06V40/1329 ,  G06V40/1365

Abstract: An ultrasonic sensor includes a two-dimensional array of ultrasonic transducers, wherein the two-dimensional array of ultrasonic transducers is substantially flat, a contact layer having a non-uniform thickness overlying the two-dimensional array of ultrasonic transducers, and an array controller configured to control activation of ultrasonic transducers during an imaging operation. During the imaging operation, the array controller is configured to control a transmission frequency of activated ultrasonic transducers during the imaging operation, wherein a plurality of transmission frequencies are used during the imaging operation to account for an impact of an interference pattern caused by the non-uniform thickness of the contact layer, and is configured to capture at least one fingerprint image using the plurality of transmission frequencies.

公开(公告)号：US11655139B2

公开(公告)日：2023-05-23

申请号：US16946924

申请日：2020-07-10

Applicant: InvenSense, Inc.

Inventor： Ian Flader

IPC: B81B3/00 ,  G01P15/08

CPC classification number: B81B3/001 ,  G01P15/0802 ,  B81B2203/0163 ,  B81B2203/04 ,  B81B2207/03 ,  G01P2015/0874

Abstract: A device includes a micro-electromechanical system (MEMS) device layer comprising a proof mass. The proof mass includes a first proof mass portion and a second proof mass portion. The first proof mass portion is configured to move in response to a stimuli. The second proof mass portion has a spring attached thereto. The device further includes a substrate disposed parallel to the MEMS device layer. The substrate comprises a bumpstop configured to limit motion of the first proof mass portion. The device includes a first electrode disposed on the substrate facing the second proof mass portion. The first electrode is configured to apply a pulling force onto the second proof mass portion and to move the second proof mass portion towards the first electrode.

公开(公告)号：US11651611B2

公开(公告)日：2023-05-16

申请号：US16591166

申请日：2019-10-02

Applicant: InvenSense, Inc.

Inventor： Julius Ming-Lin Tsai

IPC: G06V40/13 ,  B06B1/06 ,  B06B1/02 ,  G10K11/30 ,  G06V40/12

CPC classification number: G06V40/1306 ,  B06B1/0292 ,  B06B1/06 ,  B06B1/0622 ,  G10K11/30 ,  G06V40/1359

Abstract: A mobile device including a processor, a memory unit, a display device disposed on a first surface of the mobile device, and a fingerprint sensor disposed on a second surface of the mobile device, wherein the second surface is a curved surface having a curvature such that the fingerprint sensor is curved to match the curvature of the curved surface.

公开(公告)号：US11650078B2

公开(公告)日：2023-05-16

申请号：US17825856

申请日：2022-05-26

Applicant: InvenSense, Inc.

Inventor： Doruk Senkal ,  Houri Johari-Galle ,  Joseph Seeger

IPC: G01C25/00 ,  G01C19/5776 ,  G01C19/5719 ,  G01C19/5726 ,  G01R29/02 ,  G01R19/00 ,  G01R23/00 ,  G01R25/00

CPC classification number: G01C25/005 ,  G01C19/5719 ,  G01C19/5726 ,  G01C19/5776 ,  G01R19/0038 ,  G01R23/005 ,  G01R25/00 ,  G01R29/02 ,  B81B2201/0242 ,  B81B2207/03

Abstract: A MEMS device may output a signal during operation that may include an in-phase component and a quadrature component. An external signal having a phase that corresponds to the quadrature component may be applied to the MEMS device, such that the MEMS device outputs a signal having a modified in-phase component and a modified quadrature component. A phase error for the MEMS device may be determined based on the modified in-phase component and the modified quadrature component.

公开(公告)号：US11637537B2

公开(公告)日：2023-04-25

申请号：US16938734

申请日：2020-07-24

Applicant: INVENSENSE, INC.

Inventor： Igor Mucha ,  Michael Perrott

IPC: H03G3/30 ,  H03F3/68 ,  H04R3/04 ,  H04R29/00

Abstract: Exemplary multipath digital microphones described herein can comprise exemplary embodiments of automatic gain control and multipath digital audio signal digital signal processing chains, which allow low power and die size to be achieved as described herein, while still providing a high DR digital microphone systems. Further non-limiting embodiments can facilitate switching between multipath digital audio signal digital signal processing chains while minimizing audible artifacts associated with either the change in the gain automatic gain control amplifiers switching between multipath digital audio signal digital signal processing chains.

公开(公告)号：US11632639B2

公开(公告)日：2023-04-18

申请号：US17681349

申请日：2022-02-25

Applicant: InvenSense, Inc.

Inventor： Marek Matej ,  Stefano Riva

IPC: H04R29/00 ,  H04R3/00 ,  B81B3/00

Abstract: A device includes a micro-electromechanical system (MEMS) element configured to sense acoustic signals. The device also includes a circuitry configured to enable the microphone element to sense the acoustic signals. The circuitry is further configured to disable the microphone element to prevent the microphone element to sense the acoustic signals. It is appreciated that the circuitry is further configured to apply a test signal to the MEMS element when the microphone element is disabled. The microphone element outputs a signal in response to the test signal to the circuitry. The circuitry in response to the output signal with a first value determines that a diaphragm of the MEMS element is nonoperational and the circuitry in response to the output signal with a second value determines that the diaphragm of the MEMS element is operational.

公开(公告)号：US11623246B2

公开(公告)日：2023-04-11

申请号：US16269892

申请日：2019-02-07

Applicant: INVENSENSE, INC.

Inventor： Emad Mehdizadeh ,  Bongsang Kim ,  Chienliu Chang ,  Leonardo Baldasarre ,  Nikhil Apte ,  Xiaoyue Jiang ,  Mei-Lin Chan

IPC: B06B1/06 ,  B06B1/02 ,  H01L41/04 ,  H01L41/047 ,  H01L41/08 ,  H01L41/187 ,  H01L41/29 ,  H01L41/332 ,  H01L41/313 ,  G06V40/13

Abstract: A piezoelectric micromachined ultrasound transducer (PMUT) device may include a plurality of layers including a structural layer, a piezoelectric layer, and electrode layers located on opposite sides of the piezoelectric layer. Conductive barrier layers may be located between the piezoelectric layer and the electrodes to the prevent diffusion of the piezoelectric layer into the electrode layers.

公开(公告)号：US20230089813A1

公开(公告)日：2023-03-23

申请号：US17950007

申请日：2022-09-21

Applicant: InvenSense, Inc.

Inventor： Weng Shen Su ,  Chung-Hsien Lin ,  Yaoching Wang ,  Tsung Lin Tang ,  Ting-Yuan Liu ,  Calin Miclaus

IPC: B81C1/00 ,  G01L9/00 ,  B81B3/00

Abstract: A method includes depositing a passivation layer on a substrate; depositing and patterning a first polysilicon layer on the passivation layer; depositing and patterning a first oxide layer on the first polysilicon layer forming a patterned first oxide layer; depositing and patterning a second polysilicon layer on the patterned first oxide layer. A portion of the second polysilicon layer directly contacts a portion of the first polysilicon layer. A portion of the patterned second polysilicon layer corresponds to a bottom electrode. A second oxide layer is deposited on the patterned second polysilicon layer and on an exposed portion of the patterned first oxide layer. A portion of the second oxide layer corresponding to a sensing cavity is etched, exposing the bottom electrode. Another substrate is bonded to the second oxide layer enclosing the sensing cavity. A top electrode is disposed within the another substrate and positioned over the bottom electrode.

公开(公告)号：US20230068608A1

公开(公告)日：2023-03-02

申请号：US17822619

申请日：2022-08-26

Applicant: InvenSense, Inc.

Inventor： Ardalan HESHMATI ,  Hideaki FUKUZAWA

IPC: G06F3/01 ,  G02B27/01 ,  G02B26/10 ,  G02B26/08

Abstract: A retinal projection display system includes at least one visible light source for projecting a visible light image, an infrared light source for projecting infrared light, a scanning mirror having a field of view larger than the visible light image, a reflective surface on which the visible light image is projected and on which the infrared light is reflected at least partially towards an eye of a user, wherein the reflective surface is larger than the visible light image, at least one infrared photodetector for receiving reflected infrared light that reflects off of the eye of the user, and a hardware computation module comprising a processor and a memory, the hardware computation module configured to determine a gaze direction of the user based at least in part on the reflected infrared light.