Reducing noise in a force signal in an electronic device

    公开(公告)号:US10296123B2

    公开(公告)日:2019-05-21

    申请号:US14716659

    申请日:2015-05-19

    Applicant: Apple Inc.

    Abstract: A force sensing device can be included in a display. Noise produced by various sources can be injected into the force signals produced by the force sensing device. Example noise sources include, but are not limited to, the display, Johnson or Thermal noise from the force sensing device, system noise, and magnetically-coupled or background noise produced by ambient light sources. A sampling scheme that includes one or more noise cancelling techniques can be employed to reduce the amount of noise in the force signals.

    Pressure Resistant Force Sensing Enclosure
    54.
    发明申请

    公开(公告)号:US20190095026A1

    公开(公告)日:2019-03-28

    申请号:US16183343

    申请日:2018-11-07

    Applicant: Apple Inc.

    Abstract: A portable electronic device includes a cover glass, one or more strain gauges operable to indicate force exerted on the cover glass based on deformation of the cover glass, a housing that defines a sway space gap into which the cover glass deforms when the force is exerted on the cover glass, and an incompressible fluid positioned in the sway space gap. The incompressible fluid allows deformation of the cover glass into the sway space gap when the force is exerted on the cover glass and maintains a constant volume under hydrostatic pressure.

    Force touch button emulation
    57.
    发明授权

    公开(公告)号:US09927905B2

    公开(公告)日:2018-03-27

    申请号:US14830279

    申请日:2015-08-19

    Applicant: Apple Inc.

    CPC classification number: G06F3/0416 G06F3/0488 G06F2203/04105

    Abstract: Disclosed herein is an electronic device having a force sensing device. The force sensing device receives a continuous force input which is translated into a discrete event. In order to more accurately determine when the discrete event is to occur, the electronic device includes a two low-pass filters that concurrently receive a force signal from the force sensing device. The first low-pass filter has a first bandwidth and the second low-pass filter has a second bandwidth that is greater than the first bandwidth. The two low-pass filters filter the force signal to provide a user interface with a precise feel for slower more deliberate input while also providing fast response times for stronger, shorter input.

    Managing Power Consumption of Force Sensors

    公开(公告)号:US20170336902A1

    公开(公告)日:2017-11-23

    申请号:US15158548

    申请日:2016-05-18

    Applicant: Apple Inc.

    Abstract: A force-responsive sensor incorporating a force-sensitive element is in communication with a power controller. The power controller changes one or more performance characteristics associated with the force-responsive sensor. A performance characteristic can include a bias voltage or current, a duty cycle, a sampling rate, and so on. The performance characteristic(s) can be changed in response to a touch event or based on an operational setting of the force-responsive sensor (or an electronic device incorporating the force-responsive sensor). Regulation of the performance characteristic(s) reduces power consumption of the force-responsive sensor.

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