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公开(公告)号：US20230033775A1
公开(公告)日：2023-02-02
申请号：US17965082
申请日：2022-10-13
发明人： Sina Akhbari , Hao-Yen Tang , Mo Maghsoudnia , Man-Chia Chen
摘要： A method includes receiving energy data associated with an ultrasound input device coupled to a material layer. The energy data comprises a current energy value and past energy values associated with reflected ultrasound signals received at the ultrasound input device in response to the ultrasound input device transmitting emitted signals through the material layer towards an external surface of the material layer. The method can then include comparing the energy data with threshold data to generate a current trigger value for trigger data. The trigger data is indicative of an occurrence of a touch event when the current energy value exceeds a current threshold value of the threshold data. Then the method can include updating the threshold data based on the energy data, the trigger data, and the threshold data. Updating the threshold data comprises generating a subsequent threshold value.
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公开(公告)号：US20220128516A1
公开(公告)日：2022-04-28
申请号：US17504758
申请日：2021-10-19
发明人： Sina Akhbari , Zhongxuan Tu , Michael Chen , Hao-Yen Tang
摘要： A method of distinguishing between a first-type touch event and a second-type touch event is disclosed. A force-measuring and touch-sensing system includes piezoelectric force-measuring elements (PFEs) and piezoelectric ultrasonic transducers (PUTs), wherein each PUT can be configured as a transmitter (PUT transmitter) and/or a receiver (PUT receiver). The force-measuring and touch-sensing system is configured at a sense region. Each PUT transmitter transmits ultrasound signals towards the sense region and voltage signals are generated at the PUT receivers in response to ultrasound signals arriving from the sense region. Voltage signals are generated at PFEs in response to a low-frequency mechanical deformation of the respective piezoelectric capacitors. An event is determined to be a first-type touch event or a second-type touch event depending on a PUT data decrease and a magnitude of PFE data.
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公开(公告)号：US20210293648A1
公开(公告)日：2021-09-23
申请号：US17205728
申请日：2021-03-18
发明人： Zhongxuan Tu , Deliang Tao , Chunlei Qian , Sina Akhbari , Hao-Yen Tang
摘要： A force-measuring device testing system is disclosed. A linear actuator assembly includes a Z-axis actuator and a slider. A load cell is secured to the slider, such that actuation of the Z-axis actuator is mechanically coupled to a vertical movement of the load cell via the slider. The load cell is configured to impart a time-varying applied force to the sample which includes a force-measuring device. A load cell signal processing circuitry is configured to measure force signals at the load cell and output amplified force signals to the controller. The controller is configured to repeatedly carry out the following until a desired force trajectory has been executed: (1) calculate digital force signals in accordance with the amplified force signals, (2) calculate a next actuation of the Z-axis actuator in accordance with a desired force trajectory and an elastic parameter, and (3) control the actuation of the Z-axis actuator in accordance with its next calculated actuation.
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公开(公告)号：US20190354209A1
公开(公告)日：2019-11-21
申请号：US16417184
申请日：2019-05-20
发明人： Hao-Yen Tang , Sina Akhbari , Mo Maghsoudnia , Man-Chia Chen
摘要： An ultrasound input device can be coupled to a material layer having an external surface located opposite the material layer from the ultrasound input device. The ultrasound input device can transmit an emitted signal through the material layer towards the external surface and receive a set of reflected ultrasound signals associated with the emitted signal. The set of reflected ultrasound signals comprises at least one reflected ultrasound signal, and the set of reflected ultrasound signals can be associated with a touch event between an object and the external surface. A system can comprise one or more data processors configured for performing operations including determining an energy signal associated with the set of reflected ultrasound signals, extracting feature information associated with the energy signal, determining an inference associated with the object based on the extracted feature information, and generating an output signal associated with the determined inference.
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公开(公告)号：US12022737B2
公开(公告)日：2024-06-25
申请号：US17161591
申请日：2021-01-28
发明人： Hao-Yen Tang , Sina Akhbari , Mo Maghsoudnia
IPC分类号： H01L41/107 , G01L1/16 , G06F3/044 , H04R17/00 , H10N30/40 , H10N30/853 , H10N30/87
摘要： A system includes a piezoelectric capacitor assembly and signal processing circuitry coupled to the piezoelectric capacitor assembly. The piezoelectric capacitor assembly includes a piezoelectric member and piezoelectric capacitors located at respective lateral positions along the piezoelectric member. Each piezoelectric capacitor includes: (1) a respective portion of the piezoelectric member, (2) a first electrode, and (3) a second electrode. The first and second electrodes are positioned on opposite side of the piezoelectric member. The piezoelectric capacitors include piezoelectric force-measuring elements (PFEs). The PFEs are configured to output voltage signals between the respective first electrode and the respective second electrode in accordance with a time-varying strain at the respective portion of the piezoelectric member between the respective first electrode and the respective second electrode resulting from a low-frequency mechanical deformation. The signal processing circuitry is configured to read at least some of the PFE voltage signals.
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公开(公告)号：US11725993B2
公开(公告)日：2023-08-15
申请号：US17119365
申请日：2020-12-11
发明人： Hao-Yen Tang , Sina Akhbari , Man-Chia Chen , Zhongxuan Tu , Michael Chen
CPC分类号： G01L1/16 , G01H11/08 , H10N30/10513 , H10N30/302 , H10N30/50 , H10N30/875
摘要： A force-measuring and touch-sensing integrated circuit device includes a semiconductor substrate, a thin-film piezoelectric stack overlying the semiconductor substrate, piezoelectric micromechanical force-measuring elements (PMFEs), and piezoelectric micromechanical ultrasonic transducers (PMUTs). The thin-film piezoelectric stack includes a piezoelectric layer. The PMFEs and PMUTs are located at respective lateral positions along the thin-film piezoelectric stack, such that each of the PMFEs and PMUTs includes a respective portion of the thin-film piezoelectric stack. Each PMUT has a cavity, the respective portion of the thin-film piezoelectric stack, and first and second PMUT electrodes. Each PMFE has the respective portion of the thin-film piezoelectric stack, and first and second PMFE electrodes. Each PMFE is configured to output voltage signals between the PMFE electrodes in accordance with a time-varying strain at the respective portion of the piezoelectric layer resulting from a low-frequency mechanical deformation.
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公开(公告)号：US11719671B2
公开(公告)日：2023-08-08
申请号：US17504758
申请日：2021-10-19
发明人： Sina Akhbari , Zhongxuan Tu , Michael Chen , Hao-Yen Tang
CPC分类号： G01N29/2437 , G01L1/142 , G01L1/16 , G01N29/44 , G01N2291/102
摘要： A method of distinguishing between a first-type touch event and a second-type touch event is disclosed. A force-measuring and touch-sensing system includes piezoelectric force-measuring elements (PFEs) and piezoelectric ultrasonic transducers (PUTs), wherein each PUT can be configured as a transmitter (PUT transmitter) and/or a receiver (PUT receiver). The force-measuring and touch-sensing system is configured at a sense region. Each PUT transmitter transmits ultrasound signals towards the sense region and voltage signals are generated at the PUT receivers in response to ultrasound signals arriving from the sense region. Voltage signals are generated at PFEs in response to a low-frequency mechanical deformation of the respective piezoelectric capacitors. An event is determined to be a first-type touch event or a second-type touch event depending on a PUT data decrease and a magnitude of PFE data.
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公开(公告)号：US10585534B2
公开(公告)日：2020-03-10
申请号：US16417184
申请日：2019-05-20
发明人： Hao-Yen Tang , Sina Akhbari , Mo Maghsoudnia , Man-Chia Chen
摘要： An ultrasound input device can be coupled to a material layer having an external surface located opposite the material layer from the ultrasound input device. The ultrasound input device can transmit an emitted signal through the material layer towards the external surface and receive a set of reflected ultrasound signals associated with the emitted signal. The set of reflected ultrasound signals comprises at least one reflected ultrasound signal, and the set of reflected ultrasound signals can be associated with a touch event between an object and the external surface. A system can comprise one or more data processors configured for performing operations including determining an energy signal associated with the set of reflected ultrasound signals, extracting feature information associated with the energy signal, determining an inference associated with the object based on the extracted feature information, and generating an output signal associated with the determined inference.
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公开(公告)号：US20240061531A1
公开(公告)日：2024-02-22
申请号：US18497759
申请日：2023-10-30
发明人： Michael Chen , Zhongxuan Tu , Sina Akhbari , Hao-Yen Tang
CPC分类号： G06F3/04186 , G06F3/043 , G06F2203/04105
摘要： A multi-virtual button finger-touch input system includes a cover layer, force-measuring and touch-sensing integrated circuits (FMTSICs), each coupled to the inner surface of the cover layer corresponding to one of the virtual buttons, an elongate flexible circuit, and a host controller. The FMTSICs are mounted to the elongate flexible circuit. The host controller is in communication with each of the FMTSICs via digital bus wiring. The host controller is configured to: (1) obtain force-localization features and ultrasound-localization features of the FMTSICs and (2) determine whether an event is a finger-touch event or a false-trigger event and if the event is determined to be finger-touch event, identify one of the virtual buttons as a touched virtual button, using at least in part a model that has the force-localization features and the ultrasound-localization features as inputs. The force-localization features and ultrasound-localization features are derived from the PMFE digital data and the PMUT digital data respectively.
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公开(公告)号：US11835400B2
公开(公告)日：2023-12-05
申请号：US17205728
申请日：2021-03-18
发明人： Zhongxuan Tu , Deliang Tao , Chunlei Qian , Sina Akhbari , Hao-Yen Tang
CPC分类号： G01L5/167 , G01L1/16 , G01L25/00 , G01L27/002 , G06F3/0418
摘要： A force-measuring device testing system is disclosed. A linear actuator assembly includes a Z-axis actuator and a slider. A load cell is secured to the slider, such that actuation of the Z-axis actuator is mechanically coupled to a vertical movement of the load cell via the slider. The load cell is configured to impart a time-varying applied force to the sample which includes a force-measuring device. A load cell signal processing circuitry is configured to measure force signals at the load cell and output amplified force signals to the controller. The controller is configured to repeatedly carry out the following until a desired force trajectory has been executed: (1) calculate digital force signals in accordance with the amplified force signals, (2) calculate a next actuation of the Z-axis actuator in accordance with a desired force trajectory and an elastic parameter, and (3) control the actuation of the Z-axis actuator in accordance with its next calculated actuation.
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