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.

公开(公告)号：US20210303152A1

公开(公告)日：2021-09-30

申请号：US16836789

申请日：2020-03-31

Applicant: Apple Inc.

Inventor： Srinath HOSUR ,  Aryan HAZEGHI ,  John Stephen SMITH

IPC: G06F3/041 ,  G06F3/044

Abstract: In some examples, an input device includes a non-linear component, such as a diode. In response to a drive signal, such as a sinusoidal wave, the non-linear passive input device can produce a non-linear output that includes frequency content at the second and other higher harmonics of the fundamental frequency of the drive signal, for example. In some examples, drive electrodes can be driven with a drive signal having one of two fundamental frequencies such that the frequency of the drive signals are applied in an alternating pattern. The electronic device can sense the signal of the stylus to determine the coarse location of the stylus along the sense electrodes and, based on the frequency content of the received signal, a fine location along the axis of the drive electrodes.

公开(公告)号：US20230118216A1

公开(公告)日：2023-04-20

申请号：US18068486

申请日：2022-12-19

Applicant: Apple Inc.

Inventor： John Stephen SMITH ,  Amit NAYYAR ,  Joseph Kurth REYNOLDS ,  Sagar Rajiv VAZE ,  Marduke YOUSEFPOR

IPC: G06F3/044 ,  G06F3/041

Abstract: Touch sensor panels (or touch screens) can improve signal-to-noise ratio (SNR) using touch electrode patterns for differential drive and/or differential sense techniques. In some examples, a touch sensor panel can include a two-dimensional array of touch nodes formed from a plurality of touch electrodes. Each column (or row) of touch nodes can be driven with a plurality of drive signals. For example, a first column (or row) of touch nodes can be driven by a first drive signal applied to one or more first touch nodes in the first column (or row) and a second drive signal applied to a one or more second touch nodes of the first column (or row). In some examples, the first drive signal and the second drive signal can be complimentary drive signals. In some examples, each row (or column) of touch electrodes can be sensed by differential sense circuitry.

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：US20210373711A1

公开(公告)日：2021-12-02

申请号：US17326249

申请日：2021-05-20

Applicant: Apple Inc.

Inventor： John Stephen SMITH ,  Amit NAYYAR ,  Joseph Kurth REYNOLDS ,  Sagar Rajiv VAZE ,  Marduke YOUSEFPOR

IPC: G06F3/044 ,  G06F3/041

Abstract: Touch sensor panels (or touch screens) can improve signal-to-noise ratio (SNR) using touch electrode patterns for differential drive and/or differential sense techniques. In some examples, a touch sensor panel can include a two-dimensional array of touch nodes formed from a plurality of touch electrodes. Each column (or row) of touch nodes can be driven with a plurality of drive signals. For example, a first column (or row) of touch nodes can be driven by a first drive signal applied to one or more first touch nodes in the first column (or row) and a second drive signal applied to a one or more second touch nodes of the first column (or row). In some examples, the first drive signal and the second drive signal can be complimentary drive signals. In some examples, each row (or column) of touch electrodes can be sensed by differential sense circuitry.