Patents by Inventor Yipeng Lu
Yipeng Lu 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).
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Publication number: 20210377670Abstract: A mobile device includes one or more piezoelectric polymer layers underlying a display. The one or more piezoelectric polymer layers may be electrically driven to operate in either a d33 stretching mode or a d31 bending mode. The mobile device functions as an ultrasonic sensor in the d33 stretching mode and as an audio speaker/microphone or a proximity sensor in the d31 bending mode. The piezoelectric polymer layer operating in the d31 bending mode may be directly mechanically coupled to a display, indirectly mechanically coupled to the display and underlying an ultrasonic sensor stack, or integrated in the ultrasonic sensor stack. Signal performance of the piezoelectric polymer layer operating in the d31 bending mode may be enhanced or modulated by having a larger area, multiple layers, bi-pole or uni-pole driving with multiple layers, one or more stiff adhesives, a spacer layer, one or more mass features, a thin TFT layer, a thick piezoelectric polymer layer, or combinations thereof.Type: ApplicationFiled: May 11, 2021Publication date: December 2, 2021Inventors: Jessica Liu STROHMANN, Hrishikesh Vijaykumar PANCHAWAGH, Nicholas Ian BUCHAN, Yipeng LU, Kostadin Dimitrov DJORDJEV
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Patent number: 11182026Abstract: An example method of operation may include detecting a user touch in a first area based upon sensor data from one or more sensors of a first type, waking up one or more sensors of a second type configured to measure across some or all of the first area in response to the detecting, obtaining additional sensor data from the one or more sensors of the second type, and determining a location associated with the user touch based in part upon the sensor data from the one or more sensors of the second type.Type: GrantFiled: April 21, 2020Date of Patent: November 23, 2021Assignee: QUALCOMM IncorporatedInventors: Yue Liang, Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, Jessica Liu Strohmann, Changting Xu
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Publication number: 20210325996Abstract: An example method of operation may include detecting a user touch in a first area based upon sensor data from one or more sensors of a first type, waking up one or more sensors of a second type configured to measure across some or all of the first area in response to the detecting, obtaining additional sensor data from the one or more sensors of the second type, and determining a location associated with the user touch based in part upon the sensor data from the one or more sensors of the second type.Type: ApplicationFiled: April 21, 2020Publication date: October 21, 2021Inventors: Yue LIANG, Yipeng LU, Hrishikesh Vijaykumar PANCHAWAGH, Jessica Liu STROHMANN, Changting XU
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Patent number: 11126814Abstract: An ultrasonic fingerprint sensor system of the present disclosure may be provided with a flexible substrate. The ultrasonic fingerprint sensor system may include a film stack disposed on the flexible substrate that provides acceptable acoustic coupling for fingerprint sensing. The ultrasonic fingerprint sensor system includes a high acoustic impedance layer in an acoustic path of ultrasonic waves through a display. The high acoustic impedance layer can be electrically conductive or electrically nonconductive. In some implementations, the ultrasonic fingerprint sensor system includes an ultrasonic transceiver or an ultrasonic transmitter separate from an ultrasonic receiver.Type: GrantFiled: July 29, 2019Date of Patent: September 21, 2021Assignee: QUALCOMM IncorporatedInventors: Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, Kostadin Dimitrov Djordjev, Jae Hyeong Seo, Nicholas Ian Buchan, Chin-Jen Tseng, Tsongming Kao
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Patent number: 11087108Abstract: An apparatus may include a cover layer, a layer of first metamaterial proximate (or in) the cover layer, a light source system configured for providing light to the layer of first metamaterial and a receiver system. The first metamaterial may include nanoparticles configured to create ultrasonic waves when illuminated by light. The receiver system may include an ultrasonic receiver system configured to receive ultrasonic waves reflected from a target object in contact with, or proximate, a surface of the cover layer. The control system may be configured to receive ultrasonic receiver signals from the ultrasonic receiver system corresponding to the ultrasonic waves reflected from the target object and to perform an authentication process and/or an imaging process that is based, at least in part, on the ultrasonic receiver signals.Type: GrantFiled: November 21, 2019Date of Patent: August 10, 2021Assignee: QUALCOMM IncorporatedInventors: Jack Conway Kitchens, John Keith Schneider, Stephen Michael Gojevic, Evan Michael Breloff, James Anthony Miranto, Emily Kathryn Brooks, Fitzgerald John Archibald, Alexei Stoianov, Raj Kumar, Sai Praneeth Sreeram, Nirma Lnu, Sandeep Louis D'Souza, Nicholas Ian Buchan, Yipeng Lu, Chin-Jen Tseng, Hrishikesh Vijaykumar Panchawagh
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Patent number: 11087107Abstract: A device and method for producing said device comprising an improved ultrasonic biometric sensor is disclosed. The ultrasonic biometric sensor is composed of a pixel array and multiple copolymer layers which are polarized in such a fashion as to increase the transmitting pressure and receiving sensitivity of the sensor. The copolymer layers may be polarized in the same direction, or in opposite directions, depending on the desired functionality.Type: GrantFiled: August 20, 2019Date of Patent: August 10, 2021Assignee: QUALCOMM IncorporatedInventors: Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh, Yipeng Lu, Soon Joon Yoon, Kostadin Dimitrov Djordjev
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Publication number: 20210158002Abstract: An apparatus may include a cover layer, a layer of first metamaterial proximate (or in) the cover layer, a light source system configured for providing light to the layer of first metamaterial and a receiver system. The first metamaterial may include nanoparticles configured to create ultrasonic waves when illuminated by light. The receiver system may include an ultrasonic receiver system configured to receive ultrasonic waves reflected from a target object in contact with, or proximate, a surface of the cover layer. The control system may be configured to receive ultrasonic receiver signals from the ultrasonic receiver system corresponding to the ultrasonic waves reflected from the target object and to perform an authentication process and/or an imaging process that is based, at least in part, on the ultrasonic receiver signals.Type: ApplicationFiled: November 21, 2019Publication date: May 27, 2021Inventors: Jack Conway Kitchens, John Keith Schneider, Stephen Michael Gojevic, Evan Michael Breloff, James Anthony Miranto, Emily Kathryn Brooks, Fitzgerald John Archibald, Alexei Stoianov, Raj Kumar, Sai Praneeth Sreeram, Nirma Lnu, Sandeep Louis D'Souza, Nicholas Ian Buchan, Yipeng Lu, Chin-Jen Tseng, Hrishikesh Vijaykumar Panchawagh
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Publication number: 20210056277Abstract: A device and method for producing said device comprising an improved ultrasonic biometric sensor is disclosed. The ultrasonic biometric sensor is composed of a pixel array and multiple copolymer layers which are polarized in such a fashion as to increase the transmitting pressure and receiving sensitivity of the sensor. The copolymer layers may be polarized in the same direction, or in opposite directions, depending on the desired functionality.Type: ApplicationFiled: August 20, 2019Publication date: February 25, 2021Inventors: Jessica Liu STROHMANN, Hrishikesh Vijaykumar PANCHAWAGH, Yipeng LU, Soon Joon YOON, Kostadin Dimitrov DJORDJEV
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Publication number: 20210056276Abstract: A device and method for improved sensing with a biometric sensor assembly such as an ultrasound fingerprint sensor using an anti-fingerprint, oleophobic, or hydrophobic coating applied to a surface above the biometric sensor assembly. The coating improves the mechanical coupling of a human finger to the surface, helping to reduce acoustic loss through the finger to surface interface, improving at least the false-rejection ratio.Type: ApplicationFiled: August 19, 2019Publication date: February 25, 2021Inventors: Yipeng LU, Jessica Liu STROHMANN, Ila BADGE, Hrishikesh Vijaykumar PANCHAWAGH, Tsongming KAO
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Patent number: 10929636Abstract: An ultrasonic fingerprint sensor system of the present disclosure may be provided with a thick electrically nonconductive acoustic layer and thin electrode layer coupled to a piezoelectric layer of an ultrasonic transmitter or transceiver. The thick electrically nonconductive acoustic layer may have a high density or high acoustic impedance value, and may be adjacent to the piezoelectric layer. The thin electrode layer may be divided into electrode segments. The ultrasonic fingerprint sensor system may use flexible or rigid substrates, and may use an ultrasonic transceiver or an ultrasonic transmitter separate from an ultrasonic receiver.Type: GrantFiled: January 18, 2019Date of Patent: February 23, 2021Assignee: QUALCOMM IncorporatedInventors: Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, Kostadin Dimitrov Djordjev, Chin-Jen Tseng, Nicholas Ian Buchan, Tsongming Kao, Jae Hyeong Seo
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Patent number: 10902236Abstract: 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: GrantFiled: March 27, 2019Date of Patent: January 26, 2021Assignee: QUALCOMM IncorporatedInventors: Yipeng Lu, David William Burns
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Patent number: 10891458Abstract: An ultrasonic fingerprint sensor system of the present disclosure may be provided with an ultrasonic transmitter or ultrasonic transceiver having an electrode layer divided into a plurality of electrode segments. The ultrasonic fingerprint sensor system may detect an object over one or more electrode segments and provide a voltage burst to one or more selected electrode segments for localized generation of ultrasonic waves. The localized generation of ultrasonic waves may facilitate localized readout for imaging. In some implementations, the voltage burst may be provided in a single-ended drive scheme or differential drive scheme.Type: GrantFiled: February 28, 2019Date of Patent: January 12, 2021Assignee: QUALCOMM IncorporatedInventors: Jae Hyeong Seo, Kostadin Dimitrov Djordjev, Hrishikesh Vijaykumar Panchawagh, Sameer Wadhwa, Nicholas Ian Buchan, Yipeng Lu
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Publication number: 20200413202Abstract: An ultrasonic sensor array includes a plurality of ultrasonic transducers, each transducer including a piezoelectric member. Each of the transducers includes an electret member, a receive (Rx) layer configured to exhibit a first d33 resonating mode coefficient and a transmit (Tx) layer configured to exhibit a second d33 resonating mode coefficient, the first coefficient being different from the second coefficient. The transducers are disposed on a flexible substrate.Type: ApplicationFiled: June 27, 2019Publication date: December 31, 2020Inventors: Yuri Kusano, Yipeng Lu, Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh
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Publication number: 20200363516Abstract: Techniques for operating an ultrasonic sensor array, the ultrasonic sensor array disposed under a platen, include: making a determination whether or not to recalibrate the ultrasonic sensor array based on whether a first screen protector disposed above the platen has been removed or replaced by a second screen protector; and recalibrating the ultrasonic sensor array, when the determination is to recalibrate the ultrasonic sensor array. In some cases, the techniques include prompting a user to indicate whether or not the screen protector has been changed or removed, and recalibrating the ultrasonic sensor array only after confirmation from the user.Type: ApplicationFiled: May 16, 2019Publication date: November 19, 2020Inventors: Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, Jessica Liu Strohmann, Kostadin Dimitrov Djordjev
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Publication number: 20200356196Abstract: An ultrasonic sensor includes a substrate, a platen and an acoustic stack disposed between the substrate and the platen, including at least one piezoelectric layer. The ultrasonic transducer exhibits a signal-to-noise ratio of at least 4 over a frequency range of at least 9 to 16 MHz.Type: ApplicationFiled: May 8, 2019Publication date: November 12, 2020Inventors: Jessica Liu Strohmann, Yipeng Lu, Hrishikesh Vijaykumar Panchawagh
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Patent number: 10820888Abstract: An ultrasonic imaging apparatus having a Micro-machined Ultrasonic Transducer (MUT), such as a Piezoelectric MUT (PMUT) or Capacitive MUT (CMUT), with a transmitting mode and a receiving mode for generating and sensing acoustic pressure in imaging applications. During transmission in a PMUT the inverse piezoelectric effect on the piezo layer causes transverse stress, which causes a bending moment in the PMUT structure leading to out-of-plane deflection. Different applied signs of voltage generates different signs of stress inside the piezo that in turn cause oscillating motion generating an acoustic pressure wave. During signal reception, incident pressure waves deflect the PMUT creating transverse stress, resulting in a charge determined through measuring voltage between electrodes. The apparatus is particularly well-suited for use in health care, such as measuring fat/muscle thickness, blood-flow, and blood pressure.Type: GrantFiled: March 9, 2016Date of Patent: November 3, 2020Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Bernhard E. Boser, David A. Horsley, Hao-Yen Tang, Yipeng Lu
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Patent number: 10817694Abstract: The descried techniques may support a sensing scheme for reducing background signals in imaging sensors. A device may include a sensor configured to determine ridges and valleys of a fingerprint. The sensor may include a pixel array with each pixel of the pixel array having a set of electrodes. To reduce the background signals, the device may sense, e.g., during a transmit mode, a first set of signals associated with the pixel array using at least one electrode of the set of electrodes, and sense, e.g., during a receive mode, a second set of signals associated with the pixel array using the at least one electrode. The device may reduce a background signal associated with the sensor according to the sensing of the first set of signals and the second set of signals.Type: GrantFiled: March 22, 2019Date of Patent: October 27, 2020Assignee: QUALCOMM IncorporatedInventors: Yipeng Lu, Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh
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Publication number: 20200302140Abstract: The descried techniques may support a sensing scheme for reducing background signals in imaging sensors. A device may include a sensor configured to determine ridges and valleys of a fingerprint. The sensor may include a pixel array with each pixel of the pixel array having a set of electrodes. To reduce the background signals, the device may sense, e.g., during a transmit mode, a first set of signals associated with the pixel array using at least one electrode of the set of electrodes, and sense, e.g., during a receive mode, a second set of signals associated with the pixel array using the at least one electrode. The device may reduce a background signal associated with the sensor according to the sensing of the first set of signals and the second set of signals.Type: ApplicationFiled: March 22, 2019Publication date: September 24, 2020Inventors: Yipeng Lu, Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh
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Publication number: 20200279087Abstract: An ultrasonic fingerprint sensor system of the present disclosure may be provided with an ultrasonic transmitter or ultrasonic transceiver having an electrode layer divided into a plurality of electrode segments. The ultrasonic fingerprint sensor system may detect an object over one or more electrode segments and provide a voltage burst to one or more selected electrode segments for localized generation of ultrasonic waves. The localized generation of ultrasonic waves may facilitate localized readout for imaging. In some implementations, the voltage burst may be provided in a single-ended drive scheme or differential drive scheme.Type: ApplicationFiled: February 28, 2019Publication date: September 3, 2020Inventors: Jae Hyeong Seo, Kostadin Dimitrov Djordjev, Hrishikesh Vijaykumar Panchawagh, Sameer Wadhwa, Nicholas Ian Buchan, Yipeng Lu
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Publication number: 20200234021Abstract: An ultrasonic fingerprint sensor system of the present disclosure may be provided with a thick electrically nonconductive acoustic layer and thin electrode layer coupled to a piezoelectric layer of an ultrasonic transmitter or transceiver. The thick electrically nonconductive acoustic layer may have a high density or high acoustic impedance value, and may be adjacent to the piezoelectric layer. The thin electrode layer may be divided into electrode segments. The ultrasonic fingerprint sensor system may use flexible or rigid substrates, and may use an ultrasonic transceiver or an ultrasonic transmitter separate from an ultrasonic receiver.Type: ApplicationFiled: January 18, 2019Publication date: July 23, 2020Inventors: Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, Kostadin Dimitrov Djordjev, Chin-Jen Tseng, Nicholas Ian Buchan, Tsongming Kao, Jae Hyeong Seo