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    Gap Sensing Via Engine Coil
    1.
    发明公开
    Gap Sensing Via Engine Coil 审中-公开

    公开(公告)号：US20240103624A1

    公开(公告)日：2024-03-28

    申请号：US18144075

    申请日：2023-05-05

    Applicant: Apple Inc.

    Inventor： Denis G. Chen ,  Darya Amin-Shahidi

    IPC: G06F3/01 ,  G01B7/14

    CPC classification number: G06F3/016 ,  G01B7/14 ,  H02K33/18

    Abstract: A haptic engine for an electronic device includes a coil assembly and a stator. The coil assembly may be coupled to an input structure, such as a button cap. In an gap sensing mode, a first voltage may be driven through the coil assembly to determine an impedance of the coil assembly. The impedance is then used to determine a gap between the coil assembly and the stator. In a haptic drive mode, a second voltage is driven through the coil assembly to produce a haptic output.

    Methods to Control Force in Reluctance Actuators Based on Flux Related Parameters
    3.
    发明申请
    Methods to Control Force in Reluctance Actuators Based on Flux Related Parameters 有权

    公开(公告)号：US20220336132A1

    公开(公告)日：2022-10-20

    申请号：US17855116

    申请日：2022-06-30

    Applicant: Apple Inc.

    Inventor： Darya Amin-Shahidi ,  Hari Vasudevan ,  Juil Lee ,  Denis G. Chen

    IPC: H01F7/18 ,  G06F3/01 ,  G06F3/041 ,  H02P25/08 ,  H02P25/092

    Abstract: Disclosed herein are reluctance actuators and methods for feedback control of their applied force. Embodiments of the reluctance actuators include an electromagnet positioned to deflect a metallic plate to provide a haptic output. The control of the force is provided without force sensors (sensorless control) by monitoring voltage and/or current (V/I) applied during an actuation. For a given intended force output, an electrical parameter value (flux, current, or other parameter) is read from a look up table (LUT). The LUT may store a present value of the inductance of the reluctance actuator. The feedback control may be a quasi-static control in which the LUT is updated after actuation based on the monitored V/I. The feedback control may be real-time, with a controller comparing an estimated electrical parameter value based on the measured V/I with the value from the LUT.

    Methods to Control Force in Reluctance Actuators Based on Flux Related Parameters
    4.
    发明申请
    Methods to Control Force in Reluctance Actuators Based on Flux Related Parameters 有权

    公开(公告)号：US20210090773A1

    公开(公告)日：2021-03-25

    申请号：US16581686

    申请日：2019-09-24

    Applicant: Apple Inc.

    Inventor： Darya Amin-Shahidi ,  Hari Vasudevan ,  Juil Lee ,  Denis M. Chen

    IPC: H01F7/18 ,  G06F3/01 ,  G06F3/041

    Abstract: Disclosed herein are reluctance actuators and methods for feedback control of their applied force. Embodiments of the reluctance actuators include an electromagnet positioned to deflect a metallic plate to provide a haptic output. The control of the force is provided without force sensors (sensorless control) by monitoring voltage and/or current (V/I) applied during an actuation. For a given intended force output, an electrical parameter value (flux, current, or other parameter) is read from a look up table (LUT). The LUT may store a present value of the inductance of the reluctance actuator. The feedback control may be a quasi-static control in which the LUT is updated after actuation based on the monitored V/I. The feedback control may be real-time, with a controller comparing an estimated electrical parameter value based on the measured V/I with the value from the LUT.

    Haptic actuator including sidewall clearance restricting feature and related methods
    5.
    发明授权
    Haptic actuator including sidewall clearance restricting feature and related methods 有权

    公开(公告)号：US10281984B1

    公开(公告)日：2019-05-07

    申请号：US15964189

    申请日：2018-04-27

    Applicant: Apple Inc.

    Inventor： Darya Amin-Shahidi ,  Scott D. Abrahamson ,  Pongpinit Towashiraporn

    IPC: G06F3/01

    Abstract: A haptic actuator may include a housing having opposing ends and opposing sides extending therebetween. The haptic actuator may also include at least one coil carried by the housing and a field member having opposing ends and opposing sides extending therebetween. The haptic actuator may also include a respective flexure coupling each end of the field member to an adjacent end of the housing so that the field member is reciprocally movable within the housing responsive to the at least one coil over an operating range and while maintaining a respective sidewall clearance between each side of the field member and an adjacent side of the housing. At least one sidewall clearance restricting feature may be configured to restrict the sidewall clearance when the field member moves beyond the operating range when subject to mechanical shock.

    MODULES INCLUDING HAPTIC ENGINES
    6.
    发明申请
    MODULES INCLUDING HAPTIC ENGINES 有权

    公开(公告)号：US20250111974A1

    公开(公告)日：2025-04-03

    申请号：US18742904

    申请日：2024-06-13

    Applicant: Apple Inc.

    Inventor： Darya Amin-Shahidi ,  Scott D. Ridel ,  Jinhong Qu

    IPC: H01F7/08 ,  H01H13/14 ,  H04M1/02

    Abstract: A device includes a frame and a haptic engine. The frame defines at least one flexure. The haptic engine includes a core attached to the frame, an attraction plate attached to the at least one flexure, and an electric coil wound around at least a portion of the core. The attraction plate is separated from the core by a gap. The electric coil, when energized, creates a magnetic field that causes a width of the gap to temporarily change. Some embodiments include a cushioning pad positioned within the gap or a layer of compliant material that attaches the attraction plate to the at least one flexure or the frame.

    STRAIN GAUGE MULTI-MODE SENSING
    7.
    发明申请
    STRAIN GAUGE MULTI-MODE SENSING 有权

    公开(公告)号：US20250110557A1

    公开(公告)日：2025-04-03

    申请号：US18742701

    申请日：2024-06-13

    Applicant: Apple Inc.

    Inventor： Darya Amin-Shahidi ,  Denis G. Chen ,  Stephanie Moon ,  Vyom Sharma

    IPC: G06F3/01 ,  G06F3/0362 ,  H03K17/96

    Abstract: A device includes a button, a set of force sensors coupled with the button, a haptic engine coupled to with the button, and control circuitry, where the control circuitry is configured to control operation of the device according to a first mode of operation during a first time duration to detect user force applied to the button via signals from the set of force sensors, and control the device according to a second mode of operation during a second time duration for closed loop control of haptic feedback to the button via the haptic engine and the set of force sensors.

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