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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
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.
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公开(公告)号：US20230094873A1
公开(公告)日：2023-03-30
申请号：US17855236
申请日：2022-06-30
Applicant: Apple Inc.
Inventor： Denis G. Chen , Timothy D. Koch
IPC: G06F3/01
Abstract: A reluctance haptic engine for an electronic device includes a core, an attractor plate, and mechanical suspension. The core and/or the attractor plate may be coupled to an input structure, such as a button cap, a trackpad cover, or a touchscreen cover. In an unactuated configuration, flexible support members maintain a gap between the core and the attractor plate. An electrical current may be applied to one or more conduction loops of the core to actuate the reluctance haptic engine and provide a haptic output by moving the input structure. The electrical current may cause a magnetic flux that results in a reluctance force that pulls the attractor and the core together and causes the input structure to move to produce a haptic output.
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公开(公告)号：US11573636B2
公开(公告)日：2023-02-07
申请号：US16915539
申请日：2020-06-29
Applicant: Apple Inc.
Inventor： Darya Amin-Shahidi , Denis G. Chen , Alex M. Lee , Scott D. Ridel
Abstract: A haptic actuator may include a housing, a stator coupled to a medial interior portion of the housing, and a field member within the housing and having an opening receiving the stator therein. The field member may include a frame, and at least one permanent magnet carried by the frame. The at least one permanent magnet may include side-by-side magnetic segments having alternating magnetic polarizations with at least one non-vertical magnetic polarization transition zone between adjacent magnetic segments.
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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.
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公开(公告)号：US10859407B2
公开(公告)日：2020-12-08
申请号：US16581661
申请日：2019-09-24
Applicant: Apple Inc.
Inventor： Denis G. Chen , Arman Hajati , Manoj K. Bhattacharyya
Abstract: An integrated circuit (IC) chip including an array of asymmetrically distributed magnetic field sensing elements. Additionally, an integrated circuit (IC) chip includes a substrate, a sensing coil supported by the substrate and enclosing a portion of substrate, and a Hall effect sensor supported by the portion of the substrate enclosed by the sensing coil.
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Patent Agency Ranking
公开(公告)号：US10268272B2
公开(公告)日：2019-04-23
申请号：US15364822
申请日：2016-11-30
Applicant: Apple Inc.
Inventor： Denis G. Chen
Abstract: Described herein is a method for determining a higher order resonance mode frequency of a haptic actuator for an electronic device. The higher order resonance mode frequency may correspond to a frequency in which a mass of the haptic actuator exhibits undesired movement. The movement may cause the mass to collide or otherwise impact an enclosure of the haptic actuator. Once the higher order resonance mode frequency is determined, a delay or a polarity inversion may be added to one or more of a series of input waveforms to suppress or brake the undesired movement.
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公开(公告)号：US12212208B2
公开(公告)日：2025-01-28
申请号：US16915504
申请日：2020-06-29
Applicant: Apple Inc.
Inventor： Darya Amin-Shahidi , Denis G. Chen , Alex M. Lee , Scott D. Ridel
Abstract: A haptic actuator may include a housing, and a stator fixed to a medial interior portion of the housing. The haptic actuator may also include a field member having an opening receiving the stator therein. The field member may include a frame and at least one permanent magnet carried by the frame. The haptic actuator may also include at least one flexure coupled between an end of the frame and adjacent interior portions of the housing to permit reciprocal movement of the field member within the housing responsive to the stator.
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公开(公告)号：US11809631B2
公开(公告)日：2023-11-07
申请号：US17855236
申请日：2022-06-30
Applicant: Apple Inc.
Inventor： Denis G. Chen , Timothy D. Koch
IPC: G06F3/041 , G06F3/01 , G06F3/0354
CPC classification number: G06F3/016 , G06F3/03547 , G06F2203/0339
Abstract: A reluctance haptic engine for an electronic device includes a core, an attractor plate, and mechanical suspension. The core and/or the attractor plate may be coupled to an input structure, such as a button cap, a trackpad cover, or a touchscreen cover. In an unactuated configuration, flexible support members maintain a gap between the core and the attractor plate. An electrical current may be applied to one or more conduction loops of the core to actuate the reluctance haptic engine and provide a haptic output by moving the input structure. The electrical current may cause a magnetic flux that results in a reluctance force that pulls the attractor and the core together and causes the input structure to move to produce a haptic output.
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公开(公告)号：US20210175831A1
公开(公告)日：2021-06-10
申请号：US17033578
申请日：2020-09-25
Applicant: Apple Inc.
Inventor： Denis G. Chen , Juil Lee , Hari Vasudevan , Riccardo Tarelli , Darya Amin-Shahidi
IPC: H02P25/092 , G06F3/01 , H02P25/086
Abstract: A haptic system includes a haptic engine in which a reluctance motor is driven by a driver controller operated in conjunction with an impedance-estimator that uses amplitude-modulated calibration signals. An enveloped-calibration signal is superimposed on a haptic-drive signal to quickly, and accurately, estimate the driving coil's impedance, while minimizing power penalty.
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公开(公告)号：US10809805B2
公开(公告)日：2020-10-20
申请号：US16391100
申请日：2019-04-22
Applicant: Apple Inc.
Inventor： Denis G. Chen
Abstract: Described herein is a method for determining a higher order resonance mode frequency of a haptic actuator for an electronic device. The higher order resonance mode frequency may correspond to a frequency in which a mass of the haptic actuator exhibits undesired movement. The movement may cause the mass to collide or otherwise impact an enclosure of the haptic actuator. Once the higher order resonance mode frequency is determined, a delay or a polarity inversion may be added to one or more of a series of input waveforms to suppress or brake the undesired movement.
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