THERMAL COMPENSATION FOR FORCE-SENSITIVE BUTTON

    公开(公告)号:US20180067601A1

    公开(公告)日:2018-03-08

    申请号:US15257831

    申请日:2016-09-06

    Applicant: Apple Inc.

    Abstract: Thermal compensation can be applied to force measurements of a force-sensitive button. A temperature differential between an object and the force-sensitive button can result in changes in the reconstructed force by the force sensor due to thermal effects rather than actual user force, which in turn can result in degraded performance of the force sensor (e.g., false positive or inconsistent activation force). In some examples, a force-sensitive button can include a force sensor configured to measure an amount of force applied to the force-sensitive button, and a temperature sensor configured to measure a temperature associated with the force sensor. The measured temperature can be used to compensate the amount of force measured by the force sensor based on the temperature associated with the force sensor. In some examples, the thermal compensation can be applied when an object is detected contacting the force-sensitive button (i.e., when rapid temperature differentials can occur).

    GAIN-BASED ERROR TRACKING FOR FORCE SENSING
    4.
    发明申请

    公开(公告)号:US20170153760A1

    公开(公告)日:2017-06-01

    申请号:US15089415

    申请日:2016-04-01

    Applicant: Apple Inc.

    Abstract: An electronic device can include gain-based error tracking for improved force sensing performance. The electronic device can comprise a plurality of force sensors (e.g., coupled to a touch sensor panel configured to detect an object touching the touch sensor panel). The plurality of force sensors can be configured to detect an amount of force with which the object touches the touch sensor panel. A processor can be coupled to the plurality of force sensors, and the processor can be configured to: in accordance with a determination that an acceleration characteristic of the electronic device is less than a threshold, determine an error metric for one or more of the plurality of force sensors, and in accordance with a determination that the acceleration characteristic of the electronic device is not less than the threshold, forgo determining the error metric for one or more of the plurality of force sensors.

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