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    Motion Sensing Using Hall Voltage Signals
    11.
    发明申请
    Motion Sensing Using Hall Voltage Signals 审中-公开

    公开(公告)号：US20200018622A1

    公开(公告)日：2020-01-16

    申请号：US16581661

    申请日：2019-09-24

    Applicant: Apple Inc.

    Inventor： Denis G. Chen ,  Arman Hajati ,  Manoj K. Bhattacharyya

    IPC: G01D5/20 ,  G01D5/14

    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.

    MASS DISPLACEMENT ESTIMATION USING BACK EMF AND MAGNETIC REFERENCE CROSSING
    12.
    发明申请
    MASS DISPLACEMENT ESTIMATION USING BACK EMF AND MAGNETIC REFERENCE CROSSING 审中-公开

    公开(公告)号：US20180266849A1

    公开(公告)日：2018-09-20

    申请号：US15698477

    申请日：2017-09-07

    Applicant: Apple Inc.

    Inventor： Denis G. Chen ,  Hari Vasudevan

    IPC: G01D5/14 ,  G08B6/00

    Abstract: In an embodiment, a single-sided or double-sided moving magnet haptic engine comprises: a frame; one or more magnetic field sources mounted to the frame and operable to generate a magnetic field and a back electromotive force (EMF) voltage; a magnetic mass positioned within the frame and operable to move within the frame along a movement axis; a comparator mounted to the frame, the comparator operable to detect the magnetic field and to generate a signal indicating a crossing of one or more magnetic references by the magnetic field; and a processor coupled to the one or more sensors and operable to estimate a displacement of the magnetic mass on the movement axis based on the back EMF voltage and the signal. Other embodiments are directed to a single-sided or double-sided moving coil haptic engine.

    Dampening Mechanical Modes of a Haptic Actuator Using a Delay
    13.
    发明申请
    Dampening Mechanical Modes of a Haptic Actuator Using a Delay 审中-公开

    公开(公告)号：US20170285747A1

    公开(公告)日：2017-10-05

    申请号：US15364822

    申请日：2016-11-30

    Applicant: Apple Inc.

    Inventor： Denis G. Chen

    IPC: G06F3/01 ,  G08B6/00 ,  G06F3/16

    CPC classification number: G06F3/016 ,  G08B6/00

    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.

    Reluctance haptic engine for an electronic device
    17.
    发明授权
    Reluctance haptic engine for an electronic device 有权

    公开(公告)号：US10976824B1

    公开(公告)日：2021-04-13

    申请号：US16584443

    申请日：2019-09-26

    Applicant: Apple Inc.

    Inventor： Darya Amin-Shahidi ,  Alex M. Lee ,  Denis G. Chen ,  Alex J. Lehmann ,  Alex J. Speltz ,  Etienne Marecal

    IPC: G06F3/01 ,  G05G5/03 ,  G06F3/041 ,  G06F1/16 ,  G06F3/0354 ,  G05G1/02

    Abstract: A reluctance haptic engine for an electronic device includes a core, an attractor, and one or more flexible support members. The core and/or the attractor may be coupled to an input structure, such as a button cap, trackpad cover, touchscreen cover, or the like. In an unactuated configuration, flexible support members maintain a gap between the core and the attractor. 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 (e.g., translate, rotate, oscillate, vibrate, or deform) to produce a haptic output.

    Interrogating DOE integrity by reverse illumination
    20.
    发明授权
    Interrogating DOE integrity by reverse illumination 有权

    公开(公告)号：US09970845B2

    公开(公告)日：2018-05-15

    申请号：US15019978

    申请日：2016-02-10

    Applicant: Apple Inc.

    Inventor： Denis G. Chen ,  Brian S. Medower ,  Chin Han Lin

    IPC: G01B9/00 ,  G01M11/02 ,  G01J3/18 ,  G01J1/32 ,  G01J3/02 ,  G01J1/02

    CPC classification number: G01M11/02 ,  G01J1/32 ,  G01J3/027 ,  G01J3/18 ,  G01J2001/0276

    Abstract: Optical apparatus includes a primary radiation source, which emits first optical radiation along a first optical axis. A DOE includes at least an entrance surface, upon which the first optical radiation from the primary radiation source is incident, and an exit surface, through which one or more primary diffraction orders of the first optical radiation are emitted from the DOE. At least one secondary radiation source is configured to direct second optical radiation to impinge on the DOE along a second optical axis, which is non-parallel to the first optical axis, causing at least a part of the second optical radiation to be diffracted by the DOE such that one or more secondary diffraction orders of the second optical radiation are emitted through the entrance face of the DOE. At least one detector is configured to sense at least one of the secondary diffraction orders of the second optical radiation.

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