Patents by Inventor David William Burns

David William Burns 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).

  • Patent number: 11047777
    Abstract: A system for concentrating particles in an air stream includes an air channel having a first open end and a second open end. The air channel may be enclosed by a channel wall extending from at least the first open to the second open end. Two or more heater elements may be positioned between the first open end and the second open end. The heater elements may be positioned near a periphery of the air channel and cooperatively configured to force particles in the air stream away from the periphery and towards an interior region of the air channel. Particles in the air stream may be thermophoretically forced towards the interior region of the air channel when the heater elements are heated and thermal gradients emanating from the heater elements are generated.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: June 29, 2021
    Inventors: David Woolsey, David William Burns
  • Patent number: 11017251
    Abstract: An apparatus may include an ultrasonic sensor array and a control system. The control system may be configured to acquire first image data generated by the ultrasonic sensor array corresponding to at least one first reflected ultrasonic wave received by at least a portion of the ultrasonic sensor array from a target object during a first acquisition time window. The control system may be configured to acquire second image data generated by the ultrasonic sensor array corresponding to at least one second reflected ultrasonic wave received by at least a portion of the ultrasonic sensor array from the target object during a second acquisition time window that is longer than the first acquisition time window. The control system may further be configured to initiate an authentication process based on the first image data and the second image data.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: May 25, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Jack Conway Kitchens, II, John Keith Schneider, Stephen Michael Gojevic, Philip John Schneider, Evan Michael Breloff, Ashish Hinger, David William Burns, Muhammed Ibrahim Sezan
  • Patent number: 11003884
    Abstract: A fingerprint sensor device includes a sensor substrate, a plurality of sensor circuits over a first surface of the sensor substrate, and a transceiver layer located over the plurality of sensor circuits and the first surface of the sensor substrate. The transceiver layer includes a piezoelectric layer and a transceiver electrode positioned over the piezoelectric layer. The piezoelectric layer and the transceiver electrode are configured to generate one or more ultrasonic waves or to receive one or more ultrasonic waves. The fingerprint sensor device may include a cap coupled to the sensor substrate and a cavity formed between the cap and the sensor substrate. The cavity and the sensor substrate may form an acoustic barrier.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: May 11, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Nicholas Ian Buchan, Mario Francisco Velez, Chin-Jen Tseng, Hrishikesh Vijaykumar Panchawagh, Firas Sammoura, Jessica Liu Strohmann, Kostadin Dimitrov Djordjev, David William Burns, Leonard Eugene Fennell, Jon Gregory Aday
  • Patent number: 10948392
    Abstract: A system for analyzing particles in an air stream includes a first heater element configured to deflect particles in an interior region of the air stream towards a peripheral wall of an air channel encompassing the air stream, a second heater element controllable to deflect the particles in a first lateral direction along the peripheral wall, and a third heater element controllable to deflect the particles in a second lateral direction along the peripheral wall. Thermal gradients in the air channel generated by the heater elements may thermophoretically force particles towards the peripheral wall in a direction perpendicular to the air stream to allow thermophoretic forcing and scanning of particles in either the first lateral direction or the second lateral direction along the peripheral wall and onto a surface of a particle detector. Systems and methods for scanning particles with thermophoretic forces are disclosed.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: March 16, 2021
    Inventors: David Woolsey, David William Burns
  • Patent number: 10948391
    Abstract: A method for analyzing particles includes concentrating the particles in an interior region of an air stream, generating a thermal gradient to deflect the concentrated particles from the interior region of the air stream to a peripheral region of the air stream, receiving orientation information, and adjusting the thermal gradient in response to the received orientation information. The particles may be concentrated in the interior of the air stream with at least two heater elements positioned near a periphery of the air stream and configured to cooperatively force particles away from the periphery and towards the interior region of the air stream. The orientation information may include gravity vector component information or angular rate component information in one, two or three substantially orthogonal directions relative to the air stream. Various systems for airborne particle detection with orientation-dependent particle discrimination are disclosed.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: March 16, 2021
    Inventors: David Woolsey, David William Burns
  • Patent number: 10921224
    Abstract: A system for detecting and analyzing particles in an air stream includes an inlet, a particle concentrator and a particle discriminator having an air channel with a cross-sectional geometry that changes within at least one of the inlet, particle concentrator and particle discriminator. The system may have a sheath air stage including a port for providing sample air, at least one sheath air inlet port for providing sheath air, and a sheath air combining region. The system may include an airflow compression stage having a varying air channel that narrows as the air stream traverses the airflow compression stage to pre-concentrate particles within an interior region of the air stream. The system may include an airflow expansion stage having an air channel that widens to slow the airstream and particle velocities. A portion of the air channel height may be narrowed to allow a larger thermophoretic force to be generated.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: February 16, 2021
    Inventors: David Woolsey, David William Burns
  • Patent number: 10902236
    Abstract: An apparatus may include an ultrasonic sensor array, a light source system and a control system. Some implementations may include an ultrasonic transmitter. The control system may be operatively configured to control the light source system to emit light that induces acoustic wave emissions inside a target object. The control system may be operatively configured to select a first acquisition time delay for the reception of acoustic wave emissions primarily from a first depth inside the target object. The control system may be operatively configured to acquire first ultrasonic image data from the acoustic wave emissions received by the ultrasonic sensor array during a first acquisition time window. The first acquisition time window may be initiated at an end time of the first acquisition time delay.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: January 26, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Yipeng Lu, David William Burns
  • Patent number: 10735865
    Abstract: This disclosure provides systems, methods and apparatus for microspeaker devices. In one aspect, a microspeaker element may include a deformable dielectric membrane that spans a speaker cavity. The deformable dielectric membrane can include a piezoactuator and a dielectric layer. Upon application of a driving signal to the piezoactuator, the dielectric layer can deflect, producing sound. In some implementations, an array of microspeaker elements can be encapsulated between a glass substrate and a cover glass. Sound generated by the microspeaker elements can be emitted through a speaker grill formed in the cover glass.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: August 4, 2020
    Assignee: SnapTrack, Inc.
    Inventors: Philip Jason Stephanou, David William Burns, Ravindra V. Shenoy
  • Patent number: 10733409
    Abstract: Systems, methods and apparatus for configuring a fingerprint sensor to operate in a capacitive sensing mode and an ultrasonic sensing mode are disclosed. A fingerprint sensor may be configured to operate in a capacitive sensing mode by driving a sensing electrode using a controller. In some implementations, an object positioned on or near the sensing electrode may be detected using the fingerprint sensor in the capacitive sensing mode, and the controller can drive electrodes of the fingerprint sensor differently to configure the fingerprint sensor to operate in an ultrasonic sensing mode. In some implementations, an applications processor may be instructed to authenticate a fingerprint of the object from image data obtained when the fingerprint sensor is operating in the ultrasonic sensing mode. In some implementations, a display of a mobile device containing the fingerprint sensor may be unlocked, or the mobile device may be woken up when the fingerprint is authenticated.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: August 4, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Sandeep Louis D'Souza, Vadim Winebrand, Ashish Hinger, Paul Penchin Pan, Meir Agassy, Yizhaq Abudi, Micah Timothy Lawrence, Jong Soo Kim, Sherman Sebastian Antao, Bo-Ren Wang, Masoud Roham, Lennart Karl Mathe, Nathan Felix Altman, Suryaprakash Ganti, David William Burns
  • Publication number: 20200147643
    Abstract: Implementations of the subject matter described herein relate to sensors including piezoelectric micromechanical ultrasonic transducer (PMUT) sensor elements and arrays thereof. The PMUT sensor elements may be switchable between a non-ultrasonic force detection mode and an ultrasonic imaging mode. A PMUT sensor element may include a diaphragm that is capable of a static displacement on application of a force and is capable of a dynamic displacement when the PMUT sensor element transmits or receives ultrasonic signals. In some implementations, a PMUT sensor element includes a two dimensional-electron gas structure on the diaphragm. The sensors may further include a sensor controller configured to switch between a non-ultrasonic force detection mode and an ultrasonic imaging mode for one or more of the PMUT sensor elements, wherein an applied force is measured in the non-ultrasonic force detection mode and wherein an object is imaged ultrasonically during the ultrasonic imaging mode.
    Type: Application
    Filed: January 9, 2020
    Publication date: May 14, 2020
    Inventors: Firas SAMMOURA, David William BURNS, Ravindra Vaman SHENOY
  • Patent number: 10569302
    Abstract: Implementations of the subject matter described herein relate to sensors including piezoelectric micromechanical ultrasonic transducer (PMUT) sensor elements and arrays thereof. The PMUT sensor elements may be switchable between a non- ultrasonic force detection mode and an ultrasonic imaging mode. A PMUT sensor element may include a diaphragm that is capable of a static displacement on application of a force and is capable of a dynamic displacement when the PMUT sensor element transmits or receives ultrasonic signals. In some implementations, a PMUT sensor element includes a two dimensional-electron gas structure on the diaphragm. The sensors may further include a sensor controller configured to switch between a non-ultrasonic force detection mode and an ultrasonic imaging mode for one or more of the PMUT sensor elements, wherein an applied force is measured in the non-ultrasonic force detection mode and wherein an object is imaged ultrasonically during the ultrasonic imaging mode.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: February 25, 2020
    Assignee: Qualcomm Incorporated
    Inventors: Firas Sammoura, David William Burns, Ravindra Vaman Shenoy
  • Patent number: 10552658
    Abstract: A mobile device may include a first fingerprint sensor, including a platen, residing on a first side of the mobile device, and a display residing on a second side of the mobile device. The second side may be opposite from the first side. The mobile device may include a control system configured for communication with the first fingerprint sensor and the display. The control system may be further configured for receiving first fingerprint sensor signals from the first fingerprint sensor corresponding to a fingerprint contact area of a first finger positioned on the platen, for detecting one or more finger distortions corresponding to changes of the first fingerprint sensor signals and for controlling the mobile device based, at least in part, on the one or more finger distortions.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: February 4, 2020
    Assignee: Qualcomm Incorporated
    Inventors: Jessica Liu Strohmann, Yair Karmi, Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, David William Burns
  • Patent number: 10515255
    Abstract: An apparatus may include an ultrasonic sensor system, a platen, a set of bioimpedance electrodes proximate the platen and a control system configured for communication with the ultrasonic sensor system and the set of bioimpedance electrodes. The control system may be further configured for controlling the ultrasonic sensor system to transmit ultrasonic waves, receiving ultrasonic sensor signals from the ultrasonic sensor system corresponding to ultrasonic waves reflected from a portion of a body in contact with the platen, receiving bioimpedance measurements from the set of bioimpedance electrodes and estimating a status of one or more biometric indicators of the portion of the body based on the ultrasonic sensor signals and the bioimpedance measurements.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: December 24, 2019
    Assignee: Qualcomm Incorporated
    Inventors: Jessica Liu Strohmann, Yair Karmi, Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, David William Burns
  • Patent number: 10503948
    Abstract: Systems and methods for multi-spectral ultrasonic imaging are disclosed. In one embodiment, a finger is scanned at a plurality of ultrasonic scan frequencies. Each scan frequency provides an image information set describing a plurality of pixels of the finger including a signal-strength indicating an amount of energy reflected from a surface of a platen on which a finger is provided. For each of the pixels, the pixel output value corresponding to each of the scan frequencies is combined to produce a combined pixel out put value for each pixel. Systems and methods for improving the data capture of multi-spectral ultrasonic imaging are also disclosed.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: December 10, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jack Conway Kitchens, II, John Keith Schneider, Ashish Hinger, Ranjith Ranganathan, Nai-Kuei Kuo, Kostadin Dimitrov Djordjev, Stephen Michael Gojevic, David William Burns, Nao Sugawara Chuei, Eliza Yingzi Du, Ming Yu Chen, Kwokleung Chan, Jin Gu, Esra Vural
  • Patent number: 10497748
    Abstract: An ultrasonic sensor pixel includes a substrate, a piezoelectric micromechanical ultrasonic transducer (PMUT) and a sensor pixel circuit. The PMUT includes a piezoelectric layer stack including a piezoelectric layer disposed over a cavity, the cavity being disposed between the piezoelectric layer stack and the substrate, a reference electrode disposed between the piezoelectric layer and the cavity, and one or both of a receive electrode and a transmit electrode disposed on or proximate to a first surface of the piezoelectric layer, the first surface being opposite from the cavity. The sensor pixel circuit is electrically coupled with one or more of the reference electrode, the receive electrode and the transmit electrode and the PMUT and the sensor pixel circuit are integrated with the sensor pixel circuit on the substrate.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: December 3, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Hrishikesh Vijaykumar Panchawagh, Suryaprakash Ganti, Kostadin Dimitrov Djordjev, David William Burns, Timothy Alan Dickinson, Donald William Kidwell, Jr., Ravindra Vaman Shenoy, Jon Bradley Lasiter, Hao-Yen Tang, Yipeng Lu
  • Publication number: 20190354743
    Abstract: An apparatus and method for efficiently increasing the signal-to-noise ratio of a biometric sampling system by implementing differential-sampling in successive differential-sampling operations and processing the output of the successive differential-sampling operations to create a biometric image. In some cases, the biometric image may be further noise-reduced by subtracting foreground-off and background-off data.
    Type: Application
    Filed: May 15, 2018
    Publication date: November 21, 2019
    Inventors: Ashish HINGER, David William Burns, Bo-Ren WANG, Firas SAMMOURA, Sameer WADHWA, Lennart MATHE, Farhad TAGHIBAKHSH
  • Patent number: 10478858
    Abstract: A piezoelectric micromechanical ultrasonic transducer (PMUT) includes a multilayer stack disposed on a substrate. The multilayer stack may include an anchor structure disposed over the substrate, a piezoelectric layer stack disposed over the anchor structure, and a mechanical layer disposed proximate to the piezoelectric layer stack. The piezoelectric layer stack may be disposed over a cavity. The mechanical layer may seal the cavity and, together with the piezoelectric layer stack, is supported by the anchor structure and forms a membrane over the cavity, the membrane being configured to undergo one or both of flexural motion and vibration when the PMUT receives or transmits ultrasonic signals.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: November 19, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jon Bradley Lasiter, Ravindra Vaman Shenoy, Evgeni Petrovich Gousev, Hrishikesh Panchawagh, David William Burns, Nai-Kuei Kuo, Jonathan Charles Griffiths, Suryaprakash Ganti
  • Patent number: 10438040
    Abstract: Some disclosed methods involve controlling an ultrasonic sensor system to transmit ultrasonic waves and receiving signals from the ultrasonic sensor system corresponding to ultrasonic waves reflected from a finger positioned on a platen. The methods may involve obtaining fingerprint image data corresponding to the signals and determining a change in a force of at least a portion of the finger on the platen corresponding to the signals.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 8, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jessica Liu Strohmann, Yair Karmi, Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, David William Burns
  • Patent number: 10410034
    Abstract: A system may include a fingerprint sensor system and a control system. The system may be configured to transmit an ultrasonic wave including a first frequency. The control system may be configured to obtain dermis layer image data from a target object based on reflected portions of the ultrasonic waves received by the fingerprint sensor system. The dermis layer image data may correspond to ultrasonic waves received from the target object within a time interval corresponding with the dermis layer. The reflected portions of the ultrasonic wave corresponding to the dermis layer image data may include ultrasonic waves at a second frequency that is an integer multiple of the first frequency. The control system may be configured to determine whether a magnitude of the ultrasonic waves at the second frequency exceeds a harmonic threshold and, if the magnitude exceeds the harmonic threshold, the control system may perform an authentication process.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: September 10, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jessica Liu Strohmann, Yipeng Lu, Ashish Hinger, David William Burns
  • Patent number: 10366269
    Abstract: An apparatus may include an ultrasonic sensor array, a light source system and a control system. Some implementations may include an ultrasonic transmitter. The control system may be operatively configured to control the light source system to emit light that induces acoustic wave emissions inside a target object. The control system may be operatively configured to select a first acquisition time delay for the reception of acoustic wave emissions primarily from a first depth inside the target object. The control system may be operatively configured to acquire first ultrasonic image data from the acoustic wave emissions received by the ultrasonic sensor array during a first acquisition time window. The first acquisition time window may be initiated at an end time of the first acquisition time delay.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: July 30, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Yipeng Lu, David William Burns