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: 20240161533Abstract: Some disclosed implementations include an ultrasonic sensor stack and an acoustic resonator. The acoustic resonator may be configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in an ultrasonic frequency range that is suitable for ultrasonic fingerprint sensors. In some examples, the acoustic resonator may include one or more low-impedance layers residing between a first higher-impedance layer and a second higher-impedance layer. Each of the one or more low-impedance layers may have a lower acoustic impedance than an acoustic impedance of the first higher-impedance layer or an acoustic impedance of the second higher-impedance layer. At least one low-impedance layer may have a thickness corresponding to a multiple of a half wavelength at a peak frequency of the acoustic resonator. The peak frequency may be within a frequency range from 1 MHz. to 20 MHz.Type: ApplicationFiled: November 17, 2023Publication date: May 16, 2024Inventors: Jessica Liu STROHMANN, Hrishikesh Vijaykumar PANCHAWAGH, Nai-Kuei KUO, Yipeng LU, Ali LOPEZ, Kostadin Dimitrov DJORDJEV
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Publication number: 20240145114Abstract: Provided is a method for regulating a thermal boundary conductance between a metal and an insulator, including: arranging a metal on a surface of an insulator, a contact surface between the metal and the insulator being a boundary between the metal and the insulator; and the insulator including a ferroelectric, a piezoelectric, or a pyroelectric; applying an external electric field or stress to the ferroelectric, and adjusting a magnitude of the external electric field or stress, or an included angle between a direction of the external electric field or stress with the boundary to regulate the thermal boundary conductance; or applying a stress to the piezoelectric, and adjusting a magnitude of the stress, or an included angle between a direction of the stress with the boundary to regulate the thermal boundary conductancer; or adjusting a temperature of the pyroelectric to regulate the thermal boundary conductance.Type: ApplicationFiled: November 1, 2022Publication date: May 2, 2024Inventors: Yuefeng Nie, Yipeng Zang, Minghui Lu, Xuejun Yan, Chen Di, Zhiming Geng
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Publication number: 20240046691Abstract: Methods, devices and systems for providing extended reality effects are disclosed. In some examples, a control system may control a structure to provide extended reality effects and also may control an ultrasound-based haptic system to create haptic effects via transmitted ultrasonic waves. The ultrasound-based haptic system may include one or more arrays of ultrasonic transducers, such as piezoelectric micromachined ultrasonic transducers (PMUTs), mounted in or on the structure. The haptic effects may be created via air-coupled ultrasonic waves.Type: ApplicationFiled: August 3, 2022Publication date: February 8, 2024Inventors: Yipeng LU, Hrishikesh Vijaykumar PANCHAWAGH, Kostadin Dimitrov DJORDJEV
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Publication number: 20240037979Abstract: An apparatus may include an ultrasonic sensor stack, a foldable display stack and a transmission enhancement layer. The foldable display stack may include a display stiffener and display stack layers. The display stack layers may form one or more display stack resonators configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in a first ultrasonic frequency range. In some implementations, a transmission enhancement resonator may include the display stiffener and the transmission enhancement layer. In some examples, the transmission enhancement resonator may include at least a portion of the ultrasonic sensor stack. The transmission enhancement resonator may be configured to enhance the ultrasonic waves transmitted by the ultrasonic sensor stack in the first ultrasonic frequency range.Type: ApplicationFiled: October 13, 2023Publication date: February 1, 2024Inventors: Shiang-Chi LIN, Hrishikesh Vijaykumar PANCHAWAGH, Jessica Liu STROHMANN, Yipeng LU, Chin-Jen TSENG, Kostadin Dimitrov DJORDJEV, Min-Lun YANG, Chia-Wei YANG
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Patent number: 11823483Abstract: Some disclosed implementations include an ultrasonic sensor stack and an acoustic resonator. The acoustic resonator may be configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in an ultrasonic frequency range that is suitable for ultrasonic fingerprint sensors. In some examples, the acoustic resonator may include one or more low-impedance layers residing between a first higher-impedance layer and a second higher-impedance layer. Each of the one or more low-impedance layers may have a lower acoustic impedance than an acoustic impedance of the first higher-impedance layer or an acoustic impedance of the second higher-impedance layer. At least one low-impedance layer may have a thickness corresponding to a multiple of a half wavelength at a peak frequency of the acoustic resonator. The peak frequency may be within a frequency range from 1 MHz. to 20 MHz.Type: GrantFiled: September 17, 2021Date of Patent: November 21, 2023Assignee: QUALCOMM IncorporatedInventors: Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh, Nai-Kuei Kuo, Yipeng Lu, Ali Lopez, Kostadin Dimitrov Djordjev
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Patent number: 11798307Abstract: An apparatus may include an ultrasonic sensor stack, a foldable display stack and a transmission enhancement layer. The foldable display stack may include a display stiffener and display stack layers. The display stack layers may form one or more display stack resonators configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in a first ultrasonic frequency range. In some implementations, a transmission enhancement resonator may include the display stiffener and the transmission enhancement layer. In some examples, the transmission enhancement resonator may include at least a portion of the ultrasonic sensor stack. The transmission enhancement resonator may be configured to enhance the ultrasonic waves transmitted by the ultrasonic sensor stack in the first ultrasonic frequency range.Type: GrantFiled: August 30, 2021Date of Patent: October 24, 2023Assignee: QUALCOMM IncorporatedInventors: Shiang-Chi Lin, Hrishikesh Vijaykumar Panchawagh, Jessica Liu Strohmann, Yipeng Lu, Chin-Jen Tseng, Kostadin Dimitrov Djordjev, Min-Lun Yang, Chia-Wei Yang
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Patent number: 11798308Abstract: Some disclosed implementations include an ultrasonic sensor stack and an acoustic resonator. The acoustic resonator may be configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in an ultrasonic frequency range that is suitable for ultrasonic fingerprint sensors. In some examples, the acoustic resonator may include one or more low-impedance layers residing between a first higher-impedance layer and a second higher-impedance layer. Each of the one or more low-impedance layers may have a lower acoustic impedance than an acoustic impedance of the first higher-impedance layer or an acoustic impedance of the second higher-impedance layer. At least one low-impedance layer may have a thickness corresponding to a multiple of a half wavelength at a peak frequency of the acoustic resonator. The peak frequency may be within a frequency range from 1 MHz. to 20 MHz.Type: GrantFiled: September 17, 2021Date of Patent: October 24, 2023Assignee: QUALCOMM IncorporatedInventors: Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh, Nai-Kuei Kuo, Yipeng Lu, Ali Lopez, Kostadin Dimitrov Djordjev
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Publication number: 20230252816Abstract: An apparatus may include an ultrasonic sensor stack, a foldable display stack and a transmission enhancement layer. The foldable display stack may include a display stiffener and display stack layers. The display stack layers may form one or more display stack resonators configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in a first ultrasonic frequency range. In some implementations, a transmission enhancement resonator may include the display stiffener and the transmission enhancement layer. In some examples, the transmission enhancement resonator may include at least a portion of the ultrasonic sensor stack. The transmission enhancement resonator may be configured to enhance the ultrasonic waves transmitted by the ultrasonic sensor stack in the first ultrasonic frequency range.Type: ApplicationFiled: April 18, 2023Publication date: August 10, 2023Inventors: Shiang-Chi LIN, Hrishikesh Vijaykumar PANCHAWAGH, Jessica Liu STROHMANN, Yipeng LU, Chin-Jen TSENG, Kostadin Dimitrov DJORDJEV, Min-Lun YANG, Chia-Wei YANG
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Patent number: 11703578Abstract: 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: GrantFiled: May 13, 2022Date of Patent: July 18, 2023Assignee: QUALCOMM IncorporatedInventors: Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, Jessica Liu Strohmann, Kostadin Dimitrov Djordjev
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Publication number: 20230177863Abstract: Disclosed are methods, devices, apparatuses, and systems for an under-display ultrasonic fingerprint sensor. A display device may include a platen, a display underlying the platen, and an ultrasonic fingerprint sensor underlying the display, where the ultrasonic fingerprint sensor is configured to transmit and receive ultrasonic waves via an acoustic path through the platen and the display. A light-blocking layer and/or an electrical shielding layer may be provided between the ultrasonic fingerprint sensor and the display, where the light-blocking layer and/or the electrical shielding layer are in the acoustic path. A mechanical stress isolation layer may be provided between the ultrasonic fingerprint sensor and the display, where the mechanical stress isolation layer is in the acoustic path.Type: ApplicationFiled: January 30, 2023Publication date: June 8, 2023Inventors: Hrishikesh Vijaykumar Panchawagh, IIa Ravindra Badge, Yipeng LU, Kostadin Dimitrov Djordjev, Suryaprakash Ganti, Chin-Jen Tseng, Nicholas Ian Buchan, Tsongming Kao, Leonard Eugene Fennell, Firas Sammoura, Jessica Liu Strohmann, David William Burns
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Publication number: 20230086418Abstract: Some disclosed implementations include an ultrasonic sensor stack and an acoustic resonator. The acoustic resonator may be configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in an ultrasonic frequency range that is suitable for ultrasonic fingerprint sensors. In some examples, the acoustic resonator may include one or more low-impedance layers residing between a first higher-impedance layer and a second higher-impedance layer. Each of the one or more low-impedance layers may have a lower acoustic impedance than an acoustic impedance of the first higher-impedance layer or an acoustic impedance of the second higher-impedance layer. At least one low-impedance layer may have a thickness corresponding to a multiple of a half wavelength at a peak frequency of the acoustic resonator. The peak frequency may be within a frequency range from 1 MHz. to 20 MHz.Type: ApplicationFiled: September 17, 2021Publication date: March 23, 2023Inventors: Jessica Liu STROHMANN, Hrishikesh Vijaykumar PANCHAWAGH, Nai-Kuei KUO, Yipeng LU, Ali LOPEZ, Kostadin Dimitrov DJORDJEV
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Publication number: 20230088820Abstract: Some disclosed implementations include an ultrasonic sensor stack and an acoustic resonator. The acoustic resonator may be configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in an ultrasonic frequency range that is suitable for ultrasonic fingerprint sensors. In some examples, the acoustic resonator may include one or more low-impedance layers residing between a first higher-impedance layer and a second higher-impedance layer. Each of the one or more low-impedance layers may have a lower acoustic impedance than an acoustic impedance of the first higher-impedance layer or an acoustic impedance of the second higher-impedance layer. At least one low-impedance layer may have a thickness corresponding to a multiple of a half wavelength at a peak frequency of the acoustic resonator. The peak frequency may be within a frequency range from 1 MHz. to 20 MHz.Type: ApplicationFiled: September 17, 2021Publication date: March 23, 2023Inventors: Jessica Liu STROHMANN, Hrishikesh Vijaykumar PANCHAWAGH, Nai-Kuei KUO, Yipeng LU, Ali LOPEZ, Kostadin Dimitrov DJORDJEV
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Publication number: 20230063693Abstract: An apparatus may include an ultrasonic sensor stack, a foldable display stack and a transmission enhancement layer. The foldable display stack may include a display stiffener and display stack layers. The display stack layers may form one or more display stack resonators configured to enhance ultrasonic waves transmitted by the ultrasonic sensor stack in a first ultrasonic frequency range. In some implementations, a transmission enhancement resonator may include the display stiffener and the transmission enhancement layer. In some examples, the transmission enhancement resonator may include at least a portion of the ultrasonic sensor stack. The transmission enhancement resonator may be configured to enhance the ultrasonic waves transmitted by the ultrasonic sensor stack in the first ultrasonic frequency range.Type: ApplicationFiled: August 30, 2021Publication date: March 2, 2023Inventors: Shiang-Chi LIN, Hrishikesh Vijaykumar PANCHAWAGH, Jessica Liu STROHMANN, Yipeng LU, Chin-Jen TSENG, Kostadin Dimitrov DJORDJEV, Min-Lun YANG, Chia-Wei YANG
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Patent number: 11436857Abstract: An apparatus may include an ultrasonic sensor system having an ultrasonic transceiver layer, a thin-film transistor (TFT) layer and a frequency-differentiating layer. In some examples, the frequency-differentiating layer may include a first frequency-differentiating layer area corresponding to a lower-frequency area of the ultrasonic sensor system. The first frequency-differentiating layer area may include a first material having a first acoustic impedance. In some such examples, the frequency-differentiating layer may include a second frequency-differentiating layer area corresponding to a higher-frequency area of the ultrasonic sensor system. The second frequency-differentiating layer area may include a second material having a second acoustic impedance. The first acoustic impedance may, for example, be higher than the second acoustic impedance.Type: GrantFiled: August 30, 2021Date of Patent: September 6, 2022Assignee: QUALCOMM IncorporatedInventors: Jessica Liu Strohmann, Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, Kostadin Dimitrov Djordjev
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Patent number: 11438703Abstract: 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: GrantFiled: June 27, 2019Date of Patent: September 6, 2022Assignee: QUALCOMM IncorporatedInventors: Yuri Kusano, Yipeng Lu, Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh
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Publication number: 20220268906Abstract: 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 13, 2022Publication date: August 25, 2022Inventors: Yipeng LU, Hrishikesh Vijaykumar PANCHAWAGH, Jessica Liu STROHMANN, Kostadin Dimitrov DJORDJEV
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Patent number: 11393239Abstract: An ultrasonic sensor system may include an ultrasonic transceiver layer, a thin-film transistor (TFT) layer proximate a first side of the ultrasonic transceiver layer, a frequency-splitting layer proximate a second side of the ultrasonic transceiver layer and a high-impedance layer proximate the frequency-splitting layer. The frequency-splitting layer may reside between the ultrasonic transceiver layer and the high-impedance layer. The high-impedance layer may have a higher acoustic impedance than the frequency-splitting layer.Type: GrantFiled: July 1, 2020Date of Patent: July 19, 2022Assignee: QUALCOMM IncorporatedInventors: Jessica Liu Strohmann, Hrishikesh Vijaykumar Panchawagh, Nicholas Ian Buchan, Yipeng Lu, Kostadin Dimitrov Djordjev
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Patent number: 11392249Abstract: 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: GrantFiled: May 8, 2019Date of Patent: July 19, 2022Assignee: QUALCOMM IncorporatedInventors: Jessica Liu Strohmann, Yipeng Lu, Hrishikesh Vijaykumar Panchawagh
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Publication number: 20220198172Abstract: Various aspects of the present disclosure relate generally to ultrasonic fingerprint sensor. In some aspects, a device may include a flexible display. The device may include an ultrasonic fingerprint sensor that is configured to transmit and receive an ultrasonic signal in an acoustic path through the flexible display. The device may include an acoustics configuration layer that is situated between the display and the ultrasonic fingerprint sensor. The acoustics configuration layer may be configured to optimize a signal strength of the ultrasonic signal based at least in part on a configuration of one or more layers of the flexible display.Type: ApplicationFiled: December 21, 2020Publication date: June 23, 2022Inventors: Jessica Liu STROHMANN, Hrishikesh Vijaykumar PANCHAWAGH, Yipeng LU, Chin-Jen TSENG, Kostadin Dimitrov DJORDJEV
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Patent number: 11346927Abstract: 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: GrantFiled: May 16, 2019Date of Patent: May 31, 2022Assignee: QUALCOMM IncorporatedInventors: Yipeng Lu, Hrishikesh Vijaykumar Panchawagh, Jessica Liu Strohmann, Kostadin Dimitrov Djordjev