Patents by Inventor Quy CHAU

Quy CHAU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Ultrasonic fingerprint sensor with a contact layer of non-uniform thickness
    Patent number: 11682228
    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: Grant
    Filed: November 12, 2021
    Date of Patent: June 20, 2023
    Assignee: InvenSense, Inc.
    Inventors: Quy Chau, Mei-Lin Chan
  • ULTRASONIC FINGERPRINT SENSOR WITH A CONTACT LAYER OF NON-UNIFORM THICKNESS
    Publication number: 20220067324
    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: November 12, 2021
    Publication date: March 3, 2022
    Applicant: InvenSense, Inc.
    Inventors: Quy CHAU, Mei-Lin CHAN
  • Ultrasonic fingerprint sensor with a contact layer of non-uniform thickness
    Patent number: 11216632
    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: Grant
    Filed: January 13, 2020
    Date of Patent: January 4, 2022
    Assignee: InvenSense, Inc.
    Inventors: Quy Chau, Mei-Lin Chan, Xiaoyue Jiang
  • Ultrasonic fingerprint sensor with a contact layer of non-uniform thickness
    Patent number: 11176345
    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: Grant
    Filed: January 13, 2020
    Date of Patent: November 16, 2021
    Assignee: InvenSense, Inc.
    Inventors: Quy Chau, Mei-Lin Chan
  • ULTRASONIC FINGERPRINT SENSOR WITH A CONTACT LAYER OF NON-UNIFORM THICKNESS
    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
  • ULTRASONIC FINGERPRINT SENSOR WITH A CONTACT LAYER OF NON-UNIFORM THICKNESS
    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