公开(公告)号：US20220011920A1

公开(公告)日：2022-01-13

申请号：US17448879

申请日：2021-09-25

Applicant: Apple Inc.

Inventor： Andrew William SHORTEN ,  Sai ZHANG ,  Andreas Johannes KOEBERL ,  Eric S. WINOKUR ,  Liqun YANG ,  Sabino Joseph PIETRANGELO, II ,  Branislav JOVANOVIC ,  Ari Y. BENBASAT

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/01

Abstract: Techniques for rejecting apparent (but false) touches caused by objects such as water droplets located in areas with parasitic capacitive paths to ground are disclosed. To minimize these false touches, one or more guard conductors can be located in proximity to the housing and driven with a stimulation signal to shield objects from being capacitively coupled to ground through the housing. In some examples images of touch can be obtained from a non-bootstrapped or bootstrapped scan and also an extended bootstrapped scan wherein the guard conductor is driven with a stimulation signal that has the same characteristics as the stimulation signal being applied to the sensed touch nodes. In some examples, the results of the extended bootstrapped scan can be subtracted from the non-bootstrapped or bootstrapped scan to identify and reject apparent touches resulting from capacitive coupling to ground.

公开(公告)号：US20230086110A1

公开(公告)日：2023-03-23

申请号：US17652071

申请日：2022-02-22

Applicant: Apple Inc.

Inventor： Eric S. WINOKUR ,  Andreas Johannes KOEBERL ,  John Brandon LAFLEN ,  Mir Hamza MAHMOOD ,  Narmadha VIJAYAKUMAR

IPC: G06F3/041

Abstract: In some examples, a touch screen can perform a first touch scan to obtain first touch data and a second touch scan to obtain second touch data. The touch data resulting from the second touch scan may exclude respective noise (e.g., display-to-touch crosstalk (DTX) noise) or may include a reduced amount of the respective noise. In some examples, the electronic device can subtract the second touch data from the first touch data to obtain an estimate of the noise in the first touch data. In some examples, this noise estimate can be subtracted from the first touch data and an action can be performed based on the first touch data with the noise estimate removed.

公开(公告)号：US20230205365A1

公开(公告)日：2023-06-29

申请号：US18179215

申请日：2023-03-06

Applicant: Apple Inc.

Inventor： Eric S. WINOKUR ,  Andreas Johannes KOEBERL ,  John Brandon LAFLEN ,  Mir Hamza MAHMOOD ,  Narmadha VIJAYAKUMAR

IPC: G06F3/041

CPC classification number: G06F3/0418 ,  G06F3/041662 ,  G06F3/0412

Abstract: In some examples, a touch screen can perform a first touch scan to obtain first touch data and a second touch scan to obtain second touch data. The touch data resulting from the second touch scan may exclude respective noise (e.g., display-to-touch crosstalk (DTX) noise) or may include a reduced amount of the respective noise. In some examples, the electronic device can subtract the second touch data from the first touch data to obtain an estimate of the noise in the first touch data. In some examples, this noise estimate can be subtracted from the first touch data and an action can be performed based on the first touch data with the noise estimate removed.