公开(公告)号：US20220095443A1

公开(公告)日：2022-03-24

申请号：US17031570

申请日：2020-09-24

Applicant: Apple Inc.

Inventor： Daniel Jacob Benjamin BECHSTEIN ,  MohammadAli KHORRAMI ,  Vipin AYANOOR-VITIKKATE ,  Blake R. MARSHALL ,  Zhibin WANG ,  Ying CAO ,  Robert Ubo LIU ,  John Stephen SMITH

IPC: H05F3/00 ,  G06F3/0354

Abstract: An electrostatic discharge (ESD) robust design for an input device such as a stylus is disclosed. The input device can include one or more components, such as one or more Schottky diodes, that can be damaged by ESD events. To reduce the likelihood of damage to sensitive components, the parasitic capacitance between sensitive conductive paths and reference ground paths of the input device that could otherwise provide electrostatic discharge paths can be reduced (arranging current limiting resistance at specific locations among sensitive components, creating physical separation between sensitive conductive paths and reference ground paths), shielding can be added to shield the sensitive electronics from ESD pulses, and high dielectric breakdown material can be added to prevent ESD pulse entry or exit of not otherwise protected circuit parts.

公开(公告)号：US20220091685A1

公开(公告)日：2022-03-24

申请号：US17031549

申请日：2020-09-24

Applicant: Apple Inc.

Inventor： Daniel Jacob Benjamin BECHSTEIN ,  John Stephen SMITH ,  Siddharth SHEKAR ,  Teera SONGATIKAMAS ,  Elvis Mwenda KIBITI ,  Jared A. BRAUNER ,  Lindsay Diane Rego CORBET ,  Wang Chung Alston CHEUNG ,  Vipin AYANOOR-VITIKKATE ,  Nitin SITARAMAN ,  Joyan Gratian SANCTIS ,  Blake R. MARSHALL

IPC: G06F3/0354 ,  G06F3/044 ,  G06F3/038

Abstract: In some examples, a stylus can include a conductive shield. In some examples, the conductive shield can include a plurality of traces along an edge of a printed circuit board (PCB) including the stylus circuitry. In some examples, the conductive shield can include a shield can coupled to the PCB and disposed around the components of the stylus circuitry. In some examples, the conductive shield can include a hollow portion into which the stylus circuitry can be disposed and a solid portion that can act as a reference electrode. In some examples, the conductive shield can include a hollow sleeve disposed around the stylus circuitry. In some examples, the conductive sleeve can be attached to the PCB. In some examples, the conductive sleeve can be disposed between layers of a housing of the stylus. In some examples, the conductive sleeve can be integrated with the stylus housing.