Patents Assigned to Invensense Inc.
  • Publication number: 20210019487
    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 for imaging a plurality of pixels at a plurality of positions within the two-dimensional array of ultrasonic transducers.
    Type: Application
    Filed: January 13, 2020
    Publication date: January 21, 2021
    Applicant: InvenSense, Inc.
    Inventors: Quy CHAU, Mei-Lin CHAN, Xiaoyue JIANG
  • Publication number: 20210019488
    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.
    Type: Application
    Filed: January 13, 2020
    Publication date: January 21, 2021
    Applicant: InvenSense, Inc.
    Inventors: Quy CHAU, Mei-Lin CHAN
  • Patent number: 10892772
    Abstract: An audio activity detector device is disclosed. The audio activity detector device comprises a closed loop feedback regulating circuit that supplies an input signal representative of a time-varying voltage signal to a quantizer circuit, wherein the quantizer circuit, as a function of the input signal, converts the input signal to a quantizer discrete-time signal; a first circuit that, as a function of the discrete-time signal, determines a key quantizer statistic value for the quantizer discrete-time signal; and a second circuit that, as a function of the key quantizer statistic value, determines a signal statistic value for the input signal and a gain control value.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: January 12, 2021
    Assignee: INVENSENSE, INC.
    Inventor: Michael Perrott
  • Patent number: 10891461
    Abstract: Facilitating live fingerprint detection utilizing an integrated ultrasound and infrared (IR) sensor is presented herein. A fingerprint sensor can comprise a first substrate comprising the IR sensor, and a second substrate comprising an ultrasonic transducer. The second substrate is attached to a top portion of the first substrate, and a temperature output of the IR sensor facilitates a determination that a fingerprint output of the ultrasonic transducer corresponds to a finger. The IR sensor can comprise polysilicon comprising a thermopile and an array of photonic crystals thermally coupled to the thermopile.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: January 12, 2021
    Assignee: INVENSENSE, INC.
    Inventors: Fang Liu, Peter Hartwell, Martin Lim
  • Patent number: 10893628
    Abstract: A circuit board cooling system comprises a cooling unit comprising fans, pressures sensors that measure air pressure at their locations, and a sensor processing unit coupled with the pressure sensors. The cooling unit operates according to an operating configuration and generates air flow to cool a portion of a circuit board. The pressure sensors comprise a first pressure sensor located between the portion of the circuit board and the cooling unit; and a second pressure sensor located such that the portion of the circuit board is between the second pressure sensor and the cooling unit. A sensor processing unit is configured to: obtain the air pressure data measured by the plurality of pressure sensors; and adjust the operating configuration of the cooling unit based on a cooling specification and a comparison of the obtained air pressure data measured by the first pressure sensor and the second pressure sensor.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: January 12, 2021
    Assignee: InvenSense, Inc.
    Inventors: Sankalp Dayal, Vamshi Gangumalla, Zaryab Hamavand, Calin Miclaus
  • Publication number: 20200410268
    Abstract: In a method for determining whether a finger is a real finger at an ultrasonic fingerprint sensor, a sequence of images of a fingerprint of a finger are captured at an ultrasonic fingerprint sensor, wherein the sequence of images includes images captured during a change in contact state between the finger and the ultrasonic fingerprint sensor. A plurality of transient features of the finger is extracted from the sequence of images. A classifier is applied to the plurality of transient features to classify the finger as one of a real finger and a fake finger. It is determined whether the finger is a real finger based on an output of the classifier.
    Type: Application
    Filed: June 24, 2020
    Publication date: December 31, 2020
    Applicant: InvenSense, Inc.
    Inventors: Sina AKHBARI, Romain FAYOLLE, Daniela HALL
  • Patent number: 10877063
    Abstract: A microelectromechanical (MEMS) sensor, such as an accelerometer, has one more proof masses that respond to movement of the sensor, the movement of which is measured based on a distance between the one or more proof masses and on one or more sense electrodes. The accelerometer also has a plurality of auxiliary electrodes and a signal generator configured to apply an auxiliary signal having a first harmonic frequency to the plurality of auxiliary electrodes. Circuitry receives a sensed signal from the plurality of sense electrodes and identifies a portion of the sensed signal having the first harmonic frequency. Based on this identified portion of the sensed signal, the circuitry determines whether a residual voltage is present on the one or more proof masses or on the one or more sense electrodes, and the circuitry modifies the operation of the accelerometer when the residual voltage is determined to be present in order to compensate for the residual voltage.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: December 29, 2020
    Assignee: InvenSense, Inc.
    Inventors: Giacomo Gafforelli, Luca Coronato, Adolfo Giambastiani
  • Publication number: 20200400800
    Abstract: A Piezoelectric Micromachined Ultrasonic Transducer (PMUT) device is provided. The PMUT includes a substrate and an edge support structure connected to the substrate. A membrane is connected to the edge support structure such that a cavity is defined between the membrane and the substrate, where the membrane is configured to allow movement at ultrasonic frequencies. The membrane includes a piezoelectric layer and first and second electrodes coupled to opposing sides of the piezoelectric layer. An interior support structure is disposed within the cavity and connected to the substrate and the membrane.
    Type: Application
    Filed: March 20, 2020
    Publication date: December 24, 2020
    Applicant: InvenSense, Inc.
    Inventors: Eldwin NG, Julius Ming-Lin TSAI, Nikhil APTE
  • Publication number: 20200401783
    Abstract: In a method for determining whether a finger is a real finger at an ultrasonic fingerprint sensor, a first image of a fingerprint pattern is captured at an ultrasonic fingerprint sensor, wherein the first image is based on ultrasonic signals corresponding to a first time of flight range. A second image of the fingerprint pattern is captured at the ultrasonic fingerprint sensor, wherein the second image is based on ultrasonic signals corresponding to a second time of flight range, the second time of flight range being delayed compared to the first time of flight range. A difference in a width of ridges of the fingerprint pattern in the first image compared to the width of ridges of the fingerprint pattern in the second image is quantified. Based on the quantification of the difference, a probability whether the finger is a real finger is determined.
    Type: Application
    Filed: June 23, 2020
    Publication date: December 24, 2020
    Applicant: InvenSense, Inc.
    Inventors: Sina AKHBARI, Lingtao WANG, Mei-Lin CHAN, Nikhil APTE
  • Patent number: 10860831
    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.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: December 8, 2020
    Assignee: InvenSense, Inc.
    Inventors: Bruno W. Garlepp, Michael H. Perrott, Michael Daneman, James Christian Salvia, Nikhil Apte
  • Patent number: 10855308
    Abstract: Exemplary multipath digital microphone described herein can comprise exemplary embodiments of adaptive ADC range multipath digital microphones, which allow low power to be achieved for amplifiers or gain stages, as well as for exemplary adaptive ADCs in exemplary multipath digital microphone arrangements described herein, while still providing a high DR digital microphone systems. Further non-limiting embodiments can comprise an exemplary glitch removal component configured to minimize audible artifacts associated with the change in the gain of the exemplary adaptive ADCs.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: December 1, 2020
    Assignee: INVENSENSE, INC.
    Inventor: Michael Perrott
  • Patent number: 10852135
    Abstract: A device includes a proof mass of a sensor, capacitive elements, an electrode circuitry, a time multiplexing circuitry, a sense circuitry, and a force feedback circuitry. The proof mass moves from a first position to a second position responsive to an external actuation. The capacitive elements change capacitive charge in response thereto. The electrode circuitry coupled to the capacitive elements generates a charge signal. The time multiplexing circuitry pass the charge signal during a sensing time period and prevents the charge signal from passing through during a forcing time period. The sense circuitry generates a sensed signal from the charge signal. The force feedback circuitry applies a charge associated with the sensed signal to the electrode circuitry during the forcing time period. The electrode circuitry applies the charge received from the force feedback circuitry to the capacitive elements, moving the proof mass from the second position to another position.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: December 1, 2020
    Assignee: InvenSense, Inc.
    Inventors: Alireza Shirvani, Michael Perrott
  • Patent number: 10850973
    Abstract: A Microelectromechanical systems (MEMS) structure comprises a MEMS wafer. A MEMS wafer includes a handle wafer with cavities bonded to a device wafer through a dielectric layer disposed between the handle and device wafers. The MEMS wafer also includes a moveable portion of the device wafer suspended over a cavity in the handle wafer. Four methods are described to create two or more enclosures having multiple gas pressure or compositions on a single substrate including, each enclosure containing a moveable portion. The methods include: A. Forming a secondary sealed enclosure, B. Creating multiple ambient enclosures during wafer bonding, C. Creating and breaching an internal gas reservoir, and D. Forming and subsequently sealing a controlled leak/breach into the enclosure.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: December 1, 2020
    Assignee: INVENSENSE, INC.
    Inventors: Michael Daneman, Martin Lim, Kegang Huang, Igor Tchertkov
  • Publication number: 20200367858
    Abstract: An ultrasonic transducer device including a substrate, an edge support structure connected to the substrate, and a membrane connected to the edge support structure such that a cavity is defined between the membrane and the substrate, the membrane configured to allow movement at ultrasonic frequencies. The membrane includes a first piezoelectric layer having a first surface and a second surface, a second piezoelectric layer having a first surface and a second surface, wherein the second surface of the first piezoelectric layer faces the first surface of the second piezoelectric layer, a first electrode coupled to the first surface of the first piezoelectric layer, a second electrode coupled to the second surface of the second piezoelectric layer, and a third electrode between the first piezoelectric layer and the second piezoelectric layer.
    Type: Application
    Filed: May 20, 2020
    Publication date: November 26, 2020
    Applicant: InvenSense, Inc.
    Inventors: Leonardo BALDASARRE, Mei-Lin CHAN
  • Patent number: 10846502
    Abstract: A sensor device comprising a two-dimensional array of ultrasonic transducers, wherein the two-dimensional array of ultrasonic transducers is substantially flat, a non-uniform contact layer overlying the two-dimensional array of ultrasonic transducers, and a sensor processor is described. The sensor device is configured to: transmit ultrasonic signals using the two-dimensional array of ultrasonic transducers for reflection from an object in contact with the non-uniform contact layer, wherein the ultrasonic signals traverse the non-uniform contact layer, receive reflected ultrasonic signals at the two-dimensional array of ultrasonic transducers, obtain non-uniformity data characterizing the non-uniform contact layer, control operating parameters of the sensor device based on the non-uniformity data, and generate an image of the object in contact with the non-uniform contact layer based on the reflected ultrasonic signals, wherein the image is corrected for non-uniformity of the non-uniform contact layer.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: November 24, 2020
    Assignee: InvenSense, Inc.
    Inventor: Hao-Yen Tang
  • Patent number: 10837999
    Abstract: Facilitating fault detection of a system using a test input including a linear combination of inputs of the system is presented herein. A test signal component generates, via a test procedure, a test input signal including a first linear combination of at least two input signals of the system, and applies the test input signal to the system during a phase of respective phases of the test procedure; and a fault detection component detects a fault of the system based on a test output signal corresponding to the test input signal and a second linear combination of respective output signals of the system corresponding to the at least two input signals.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: November 17, 2020
    Assignee: INVENSENSE, INC.
    Inventors: Omid Oliaei, Adolfo Giambastiani
  • Patent number: 10837794
    Abstract: Systems and methods are disclosed for characterizing on foot motion of a user with a portable device by obtaining parameters sufficient to characterize the on foot motion of the user from multiple sensor assemblies. Each additional sensor assembly may be independent of each other. The characterization of on foot motion is provided by synthesizing the parameters from the sensor assemblies. Characterization of on foot motion may include detecting a step, estimating step length, or both.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: November 17, 2020
    Assignee: InvenSense, Inc.
    Inventors: Medhat Omr, Jacques Georgy, Aboelmagd Noureldin
  • Publication number: 20200357379
    Abstract: In a method for transmit beamforming of a two-dimensional array of ultrasonic transducers, a beamforming pattern to apply to a beamforming space of the two-dimensional array of ultrasonic transducers is defined. The beamforming space includes a plurality of elements, where each element of the beamforming space corresponds to an ultrasonic transducer of the two-dimensional array of ultrasonic transducers, where the beamforming pattern identifies which ultrasonic transducers within the beamforming space are activated during a transmit operation of the two-dimensional array of ultrasonic transducers, and wherein at least some of the ultrasonic transducers that are activated are phase delayed with respect to other ultrasonic transducers that are activated. The beamforming pattern is applied to the two-dimensional array of ultrasonic transducers. A transmit operation is performed by activating the ultrasonic transducers of the beamforming space according to the beamforming pattern.
    Type: Application
    Filed: July 6, 2020
    Publication date: November 12, 2020
    Applicant: InvenSense, Inc.
    Inventors: Bruno W. GARLEPP, James Christian SALVIA, Yang PAN, Michael H. PERROTT
  • Publication number: 20200355824
    Abstract: In a method of operating a two-dimensional array of ultrasonic transducers, a plurality of array positions comprising pluralities of ultrasonic transducers of the two-dimensional array of ultrasonic transducers is defined, the plurality of array positions each comprising a portion of ultrasonic transducers of the two dimensional array of ultrasonic transducers. For each array position of the plurality of array positions, a plurality of ultrasonic transducers associated with the respective array position are activated. The activation includes transmitting ultrasonic signals from a first group of ultrasonic transducers of the plurality of ultrasonic transducers, wherein at least some ultrasonic transducers of the first group of ultrasonic transducers are phase delayed with respect to other ultrasonic transducers of the first group of ultrasonic transducers, the first group of ultrasonic transducers for forming a focused ultrasonic beam.
    Type: Application
    Filed: June 1, 2020
    Publication date: November 12, 2020
    Applicant: InvenSense, Inc.
    Inventors: Nikhil APTE, Julius Ming-Lin TSAI, Michael Julian DANEMAN, Renata Melamud BERGER
  • Patent number: 10830606
    Abstract: This disclosure relates to detecting non-meaningful motion with a portable device. In one aspect, a suitable method includes detecting motion with a portable device by obtaining inertial sensor data representing motion of the portable device, wherein the inertial sensor data includes accelerometer data and gyroscope data, processing the accelerometer data, processing the gyroscope data and identifying non-meaningful motion of the portable device based, at least in part, on the processed accelerometer data and the processed gyroscope data.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: November 10, 2020
    Assignee: InvenSense, Inc.
    Inventors: Hsui-Wen Chang, Jacques Georgy