公开(公告)号：US20180307375A1

公开(公告)日：2018-10-25

申请号：US15687078

申请日：2017-08-25

Applicant: Apple Inc.

Inventor： Apexit SHAH ,  Ari Y. BENBASAT

IPC: G06F3/041 ,  G06F3/044 ,  G06K9/00 ,  G06K9/46

CPC classification number: G06F3/0418 ,  G06F3/044 ,  G06F2203/04104 ,  G06K9/00355 ,  G06K9/00523 ,  G06K9/00543 ,  G06K9/0055 ,  G06K9/4604

Abstract: Touch input processing for touch-sensitive devices can be improved by filtering unintended contact detected on a touch-sensitive surface. In wet environments in particular, water on the touch-sensitive surface can be erroneously detected as touch input and degrade touch performance. In some examples, input patches can be classified as touch patches or non-touch patches prior to computationally-intensive touch processing. Filtering out unintended touches classified as non-touch patches can reduce processing requirements and save power. Additionally, classifying input patches can improve touch performance in wet environments. In some examples, input patches can be classified as touch patches or non-touch patches based on characteristics of edge touch nodes. In some examples, input patches can be classified as touch patches or non-touch patches based on a state-based signal threshold.

公开(公告)号：US20170242500A1

公开(公告)日：2017-08-24

申请号：US15052445

申请日：2016-02-24

Applicant: Apple Inc.

Inventor： Apexit SHAH ,  Ari Y. BENBASAT

IPC: G06F3/0354 ,  G06F3/044

CPC classification number: G06F3/03545 ,  G06F3/0416 ,  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：US20170242499A1

公开(公告)日：2017-08-24

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.

公开(公告)号：US20210096723A1

公开(公告)日：2021-04-01

申请号：US17027285

申请日：2020-09-21

Applicant: Apple Inc.

Inventor： Yonathan MORIN ,  Apexit SHAH

IPC: G06F3/041

Abstract: A touch screen or touch sensor panel can detect touches by conductive objects (e.g., fingers) and an active stylus and can mitigate noise in the sensed stylus signal from multiple noise sources. In some examples, the touch sensor panel includes a plurality of touch electrodes that can be used to sense touch data indicative of a proximate conductive object and to sense stylus data. The stylus data can include noise from one or more sources, for example. In some examples, the electronic device uses the touch data to determine a characteristic of one of the sources of noise and the stylus data to determine another characteristic of the source of noise and one or more characteristics of another source of noise. After modeling the noise, the electronic device can remove the noise from the stylus data to improve the accuracy of the stylus scan.

公开(公告)号：US20180307374A1

公开(公告)日：2018-10-25

申请号：US15686969

申请日：2017-08-25

Applicant: Apple Inc.

Inventor： Apexit SHAH ,  Ari Y. BENBASAT

IPC: G06F3/041 ,  G06F3/044 ,  G06K9/00 ,  G06K9/46

CPC classification number: G06F3/0418 ,  G06F3/044 ,  G06K9/00543 ,  G06K9/0055 ,  G06K9/4604

Abstract: Touch input processing for touch-sensitive devices can be improved by filtering unintended contact detected on a touch-sensitive surface. In wet environments in particular, water on the touch-sensitive surface can be erroneously detected as touch input and degrade touch performance. In some examples, input patches can be classified as touch patches or non-touch patches prior to computationally-intensive touch processing. Filtering out unintended touches classified as non-touch patches can reduce processing requirements and save power. Additionally, classifying input patches can improve touch performance in wet environments. In some examples, input patches can be classified as touch patches or non-touch patches based on characteristics of edge touch nodes. In some examples, input patches can be classified as touch patches or non-touch patches based on a state-based signal threshold.

公开(公告)号：US20170249028A1

公开(公告)日：2017-08-31

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: G06F3/0354 ,  G06F3/14 ,  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.

公开(公告)号：US20220171519A1

公开(公告)日：2022-06-02

申请号：US17651351

申请日：2022-02-16

Applicant: Apple Inc.

Inventor： Mayank GARG ,  Apexit SHAH

IPC: G06F3/041

Abstract: Grip detection can be beneficial for an electronic device to ignore unintended contacts on a touch sensitive surface. Examples of the disclosure provide various ways for identifying an input patch as a grip. In some examples, identifying an input patch as a grip comprises determining whether the input patch satisfies one or more grip identification criteria. In some examples, identified grips are saved in a grip database. In some examples, the identified grips are filtered out of touch images. In some examples, when baseline touch data for a touch-sensitive is updated, the touch processor can forgo updating the baseline for portions of the touch sensitive surface associated with the identified grips.

公开(公告)号：US20210096725A1

公开(公告)日：2021-04-01

申请号：US16866473

申请日：2020-05-04

Applicant: Apple Inc.

Inventor： Mayank GARG ,  Apexit SHAH

IPC: G06F3/041

Abstract: Grip detection can be beneficial for an electronic device to ignore unintended contacts on a touch sensitive surface. Examples of the disclosure provide various ways for identifying an input patch as a grip. In some examples, identifying an input patch as a grip comprises determining whether the input patch satisfies one or more grip identification criteria. In some examples, identified grips are saved in a grip database. In some examples, the identified grips are filtered out of touch images. In some examples, when baseline touch data for a touch-sensitive is updated, the touch processor can forgo updating the baseline for portions of the touch sensitive surface associated with the identified grips.

公开(公告)号：US20170068330A1

公开(公告)日：2017-03-09

申请号：US14964514

申请日：2015-12-09

Applicant: Apple Inc.

Inventor： Seyed Mohammad NAVIDPOUR ,  Apexit SHAH ,  Wayne Carl WESTERMAN

IPC: G06F3/038 ,  G06F3/0354 ,  G06F3/041

CPC classification number: G06F3/03545 ,  G06F3/0418 ,  G06F3/044

Abstract: Pre-processing can be applied to raw signal measurements resulting from stimulation from an input device, such as an active stylus, having a non-linear signal profile. The pre-processing can include a non-linear transformation, which can linearize the signal profile and thereby reduce wobble resulting from location detection algorithms. The transformation can be selected based on the signal profile for the stylus and the ideal profile for the location detection algorithms. In some examples, the transformation can be applied to linearize the entire signal profile, but in other examples, the non-linear transformation can be applied only to specific regions of the signal profile. The pre-processing can also discard raw signal measurements that are at least a threshold distance from the peak signal measurement or raw signal measurements below a threshold signal level. Pre-processing raw signal measurements before detecting location can reduce wobble across a range of stimulation frequencies and stylus orientations.

Abstract translation: 预处理可以应用于从具有非线性信号轮廓的输入装置（例如有源手写笔）的刺激导致的原始信号测量。 预处理可以包括非线性变换，其可以线性化信号分布，从而减少由位置检测算法产生的摆动。 可以基于用于触控笔的信号轮廓和位置检测算法的理想轮廓来选择变换。 在一些示例中，可以将变换应用于将整个信号分布线性化，但在其他示例中，非线性变换可以仅应用于信号分布的特定区域。 预处理还可以丢弃与峰值信号测量或原始信号测量之间至少阈值距离低于阈值信号电平的原始信号测量。 在检测位置之前预处理原始信号测量可以减少刺激频率和触针取向范围内的摆动。