公开(公告)号：US10048777B2

公开(公告)日：2018-08-14

申请号：US15052445

申请日：2016-02-24

Applicant: Apple Inc.

Inventor： Apexit Shah ,  Ari Y. Benbasat

IPC: G06F3/0354 ,  G06F3/044

Abstract: In one aspect, the present disclosure relates to a method and system for performing an adaptive make/break detection technique including adapting make and break thresholds based on the sum of all signals measured on display electrodes when the sum is lower than a respective filtered sum value. The filtered sum values are produced by a fast and slow filter, which correspond to the break and make thresholds respectively. By performing this method, the accuracy of detecting stylus touch-down and lift-off from a display can be improved, even in the presence of confounding factors such as variation in stylus manufacture, user grip, stylus angle, and water on the display.

公开(公告)号：US09904379B2

公开(公告)日：2018-02-27

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: G06F3/044 ,  G06F3/0354 ,  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.