公开(公告)号：US20170249028A1

公开(公告)日：2017-08-31

申请号：US15057058

申请日：2016-02-29

Applicant: Apple Inc.

Inventor： Blake R. MARSHALL ,  Apexit SHAH ,  Ari Y. BENBASAT ,  Li-Quan TAN ,  Priyanka BHANDARI ,  Reza NASIRI MAHALATI ,  Sarah M. BOLTON

IPC: G06F3/0354 ,  G06F3/14 ,  G06F3/041

CPC classification number: G06F3/03545 ,  G06F3/0418 ,  G06F3/044

Abstract: A level of wear of a stylus tip can be estimated and in accordance with a determination that the level of wear of the stylus tip exceeds a threshold, the stylus input functionality of an electronic device can be disabled. The threshold can be set such that the stylus can be disabled before the stylus sensing performance degrades to a degree perceptible to a human and/or before exposing internal portions of the stylus that can scratch a touch screen. Additionally or alternatively, a notification can be provided to indicate to a user that the stylus tip should be replaced. In some examples, the estimated level of wear can also be used to provide warning notifications. Stylus tip wear can be estimated, for example, based on a detected total signal strength or based on an estimated total distance traversed by the stylus tip across a surface.