公开(公告)号：US09811181B2

公开(公告)日：2017-11-07

申请号：US15052435

申请日：2016-02-24

Applicant: Apple Inc.

Inventor： Apexit Shah ,  Seyed M. Navidpour

IPC: G06F3/0354

CPC classification number: G06F3/03545 ,  G06F3/0418

Abstract: In one aspect, the present disclosure relates to a method and system for performing a noise correction technique including determining core electrodes and non-core electrodes, generating a noise estimate for each electrode based on electrodes that are at least an offset distance away from the electrode, correcting the signal at each electrode based on the noise estimate, and setting the corrected signal to zero if the corrected signal has a sign that is opposite the sign of the peak magnitude signal. By performing this method, noise induced on sense lines of a stylus by an LCD can be corrected for and accuracy of stylus positioning may be improved.