公开(公告)号：US20160147319A1

公开(公告)日：2016-05-26

申请号：US14550784

申请日：2014-11-21

Applicant: Apple Inc.

Inventor： Manu Agarwal ,  Shahrooz Shahparnia ,  Vivek Pant

IPC: G06F3/0354 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0418 ,  G06F2203/04107

Abstract: A touch sensor may overlap a display. A transparent shield layer that is grounded around its edges may be interposed between the display and the touch sensor to help prevent noise from display data lines from reaching the touch sensor. The data lines may extend along a first dimension. The touch sensor may have first elongated electrodes that extend along the first dimension and second elongated electrodes that extend along a second dimension that is perpendicular to the first dimension. The second electrodes may be interposed between the first electrodes and the data lines. Pen present electrodes may be used to gather pen present data associated with a stylus on the touch sensor. Adjacent noise sensors may collect noise data that is removed from the pen present data.

Abstract translation: 触摸传感器可能与显示器重叠。 围绕其边缘接地的透明屏蔽层可以介于显示器和触摸传感器之间，以帮助防止显示数据线的噪声到达触摸传感器。 数据线可以沿着第一维度延伸。 触摸传感器可以具有沿着第一尺寸延伸的第一细长电极和沿垂直于第一尺寸的第二尺寸延伸的第二细长电极。 第二电极可以介于第一电极和数据线之间。 笔当前电极可用于收集与触摸传感器上的触控笔相关联的笔存在数据。 相邻的噪声传感器可以收集从笔当前数据中去除的噪声数据。

公开(公告)号：US20150338932A1

公开(公告)日：2015-11-26

申请号：US14283105

申请日：2014-05-20

Applicant: Apple Inc.

Inventor： Vivek Pant ,  Shahrooz Shahparnia ,  John Greer Elias

IPC: G06F3/0354 ,  G06F3/038 ,  G06F3/041 ,  G06F3/044

CPC classification number: G06F3/03545 ,  G06F3/038 ,  G06F3/0418 ,  G06F3/044 ,  G06F3/0488

Abstract: An algorithm for reducing stylus tip wobble for a stylus translating on a surface over and between electrodes of a touch sensor panel is disclosed. In some examples, a first position estimate can be calculated using a first position calculation method and a second position estimate can be calculated using a second position calculation method. The position of the stylus can be determined based on a weighted combination of the first and second position estimates. In some examples, the first position estimate can be calculated using an even-point centroid of signal contributions from an even number of electrodes of a touch sensor panel and the second position estimate can be calculated using an odd-point centroid of signal contributions from an odd number of electrodes. In some examples, the weighting can be assigned based on a ratio of the two largest amplitude signals and based on a ratio of the second and third largest amplitude signals.

Abstract translation: 公开了一种用于减少在触摸传感器面板的电极之间的表面上平移的触控笔的触笔尖摆动的算法。 在一些示例中，可以使用第一位置计算方法来计算第一位置估计，并且可以使用第二位置计算方法来计算第二位置估计。 可以基于第一和第二位置估计的加权组合来确定触控笔的位置。 在一些示例中，可以使用来自触摸传感器面板的偶数个电极的信号贡献的偶数中心来计算第一位置估计，并且可以使用来自第一位置估计的信号贡献的奇点中心来计算第二位置估计 奇数个电极。 在一些示例中，可以基于两个最大幅度信号的比率并且基于第二和第三最大振幅信号的比率来分配加权。

公开(公告)号：US10895932B1

公开(公告)日：2021-01-19

申请号：US15591037

申请日：2017-05-09

Applicant: Apple Inc.

Inventor： Moshe Malkin ,  Vivek Pant

IPC: G06F3/041 ,  G06F3/044

Abstract: Improved sensing can include modified sampling and/or processing to improve performance against noise due to environmental variations and interference. In some examples, improved interference rejection can be achieved by sampling a sensor multiple times during settled periods. In some examples, the excitation signal and sampling window can be dynamically adjusted to satisfy drift and/or interference specifications based on various operating conditions or the operating environment. In some examples, drift performance can be traded off to improve interference performance. In some examples, improved immunity to environmental variations can be achieved by equalizing sensor outputs in accordance with characterization of the sensing system. In some examples, improved performance can be achieved by sampling the sensor continuously and using an optimized window function to improve performance against noise.

公开(公告)号：US10474277B2

公开(公告)日：2019-11-12

申请号：US15169679

申请日：2016-05-31

Applicant: Apple Inc.

Inventor： Vivek Pant ,  Moshe Malkin ,  Shahrooz Shahparnia

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/0354

Abstract: Position-based sensing methods and systems can be used to transmit data from an input device to a touch-sensitive device. For example, the touch sensing system may perform one or more coarse input device sub-scans to determine a coarse location of the input device. The coarse location can be used to select one or more touch sensors (or sensor channels) to sample for decoding data encoded in the stimulation signals from the input device. During one or more fine input device sub-scans, the touch sensing system can determine a fine location of the input device and decode the data from the input device sampled from the selected touch sensors (or sensor channels).

公开(公告)号：US09921696B2

公开(公告)日：2018-03-20

申请号：US14866846

申请日：2015-09-26

Applicant: Apple Inc.

Inventor： Steven P. Hotelling ,  Vivek Pant ,  Prathit Bugnait ,  Isaac Chan

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0418 ,  G06F2203/04103

Abstract: Electrode configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of a touch sensor panel is disclosed. In some examples, electrodes associated with a more linear signal profile are correlated with lower wobble error. In some examples, electrodes are coupled to adjacent electrodes via diffusing resistors such that the signal profile for each electrode is spread to be more linear. In some configurations, the value of the diffusing resistors and series resistance associated with an electrode is selected based on a desired signal profile for that electrode. In some examples, the series resistance can include a trace resistance and a compensating resistance. The compensating resistance can compensate for a variance in trace resistance between electrodes, thus making series resistance substantially equal for each of the electrodes.