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    SYSTEM AND METHODS FOR LOW VOLTAGE SENSING IN PIEZOELECTRIC HAPTICS
    1.
    发明公开
    SYSTEM AND METHODS FOR LOW VOLTAGE SENSING IN PIEZOELECTRIC HAPTICS 审中-公开

    公开(公告)号：US20240341194A1

    公开(公告)日：2024-10-10

    申请号：US18232953

    申请日：2023-08-11

    Applicant: Microchip Technology Incorporated

    Inventor： Razvan Costache ,  Miguel Angel Salcedo

    IPC: H10N30/00 ,  G01L1/16 ,  H10N30/80

    CPC classification number: H10N30/101 ,  G01L1/16 ,  H10N30/802

    Abstract: A device includes a high-voltage amplifier to amplify a bursted signal and may couple to a driver circuit to drive a piezoelectric actuator. During the on-time of the bursted signal, a feedback circuit may compensate for non-idealities in the system and may equalize the signal at the actuator and the output of the high-voltage amplifier. During the off-time of the bursted signal, a signal conditioning circuit may sense a difference signal between the signal at the actuator and the signal at the high-voltage amplifier output and may interpret this difference signal as pressure applied to the piezoelectric actuator.

    SYSTEM INCLUDING PIEZOELECTRIC CAPACITOR ASSEMBLY HAVING FORCE-MEASURING, TOUCH-SENSING, AND HAPTIC FUNCTIONALITIES
    5.
    发明公开
    SYSTEM INCLUDING PIEZOELECTRIC CAPACITOR ASSEMBLY HAVING FORCE-MEASURING, TOUCH-SENSING, AND HAPTIC FUNCTIONALITIES 审中-公开

    公开(公告)号：US20240306508A1

    公开(公告)日：2024-09-12

    申请号：US18665268

    申请日：2024-05-15

    Applicant: UltraSense Systems, Inc.

    Inventor： Hao-Yen Tang ,  Sina Akhbari ,  Mo Maghsoudnia

    IPC: H10N30/40 ,  G01L1/16 ,  G06F3/044 ,  H04R17/00 ,  H10N30/853 ,  H10N30/87

    CPC classification number: H10N30/40 ,  G01L1/16 ,  G06F3/044 ,  H04R17/00 ,  H10N30/8542 ,  H10N30/87

    Abstract: 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.

    Haptic effect device
    10.
    发明授权
    Haptic effect device 有权

    公开(公告)号：US11954255B2

    公开(公告)日：2024-04-09

    申请号：US17792627

    申请日：2021-01-14

    Applicant: Aito BV

    Inventor： Jockum Lonnberg

    IPC: G06F3/01 ,  G01L1/16 ,  G06F3/041

    CPC classification number: G06F3/016 ,  G01L1/16 ,  G06F3/04144

    Abstract: A device comprises a substrate layer having a first side and a second side. The second side of the substrate layer comprises at least one depression. The device comprises a touch-interface surface on the first side of the substrate layer. The device comprises at least one piezoelectric transducer on the second side of the substrate layer comprising a support plate and a piezoelectric element. The at least one piezoelectric transducer is aligned with the at least one depression of the substrate layer. The device comprises a printed circuit board layer electrically coupled to the piezoelectric element of the piezoelectric transducer. A device and a trackpad are provided.

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