公开(公告)号：US10558302B2

公开(公告)日：2020-02-11

申请号：US14286949

申请日：2014-05-23

Applicant: Apple Inc.

Inventor： Shahrooz Shahparnia ,  Marduke Yousefpor

IPC: G06F3/044

Abstract: Coded integration of a self-capacitance array to improve signal-to-noise ratio (SNR) of self-capacitance measurements is disclosed. A composite measurement of the self-capacitance of a plurality of electrodes can be measured for a plurality of integration periods. The composite measurements can include weighted contributions of charge from the plurality of electrodes, the weighting corresponding to a code. In some examples, the weighted contribution can include positive contributions integrated by a first integrator circuit and negative contributions integrated by a second integrator circuit. The composite measurements of the self-capacitance for the plurality of integration periods can be decoded to extract the self-capacitance measurement for the electrodes. The SNR for the self-capacitance measurements can therefore be improved by increasing the number of samples during the total integration period without requiring dedicated sensing circuitry for the electrodes.

公开(公告)号：US10061450B2

公开(公告)日：2018-08-28

申请号：US14869982

申请日：2015-09-29

Applicant: Apple Inc.

Inventor： Shahrooz Shahparnia ,  Christopher Tenzin Mullens ,  Martin Paul Grunthaner ,  Adam Geboff

IPC: G09G5/00 ,  G06F3/044 ,  G06F3/041 ,  G06F1/32

CPC classification number: G06F3/044 ,  G06F1/3215 ,  G06F1/3262 ,  G06F3/0416 ,  G06F2203/04101

Abstract: Power consumption of touch sensing operations for touch sensitive devices can be reduced by implementing a coarse scan (e.g., banked common mode scan) to coarsely detect the presence or absence of an object touching or proximate to a touch sensor panel and the results of the coarse scan can be used to dynamically adjust the operation of the touch sensitive device to perform or not perform a fine scan (e.g., targeted active mode scan). In some examples, the results of the coarse scan can be used to program a touch controller for the next touch sensing frame to idle when no touch event is detected or to perform a fine scan when one or more touch events are detected. In some examples, the results of the coarse scan can be used to abort a scheduled fine scan during the current touch sensing frame when no touch event is detected.

公开(公告)号：US10037100B2

公开(公告)日：2018-07-31

申请号：US14745344

申请日：2015-06-19

Applicant: Apple Inc.

Inventor： Amit Nayyar ,  Shahrooz Shahparnia

IPC: G06F3/041 ,  G06F1/32

CPC classification number: G06F3/0416 ,  G06F1/3262

Abstract: A touch controller can dynamically balance performance criteria, such as signal-to-noise ratio (SNR) thresholds, with power consumption for touch sensitive devices. A touch controller can be configured to reduce power consumption by reconfiguring bank boundaries for an active mode scan so as to reduce the number of banks scanned with a banked active mode scan. Additionally or alternatively, the stimulation signal amplitude and integration time of the touch controller can be dynamically adjusted to balance performance criteria with power consumption. Default integration times and default stimulation signal amplitudes can be increased in higher-noise operating environments to raise SNR, and can be reduced to save power in lower-noise operating environments. Additionally or alternatively, the touch scanning rate of the touch controller can be dynamically adjusted to reduce power consumption of the touch sensitive device or to reallocate touch sensing frames to increase integration times and thereby SNR performance.

公开(公告)号：US09946366B2

公开(公告)日：2018-04-17

申请号：US13908936

申请日：2013-06-03

Applicant: Apple Inc.

Inventor： Shahrooz Shahparnia ,  Christopher Tenzin Mullens ,  Martin Paul Grunthaner

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

CPC classification number: G06F3/03545 ,  G06F3/0416 ,  G06F3/044

Abstract: A touch input device configured to synchronize a stylus acquisition process with both a touch data acquisition process and a display refresh process is provided. The touch input device can include one or more processors that can synchronize the stylus data acquisition process to the touch data acquisition process by coordinating stylus scans to take place in between touch scans. The one or more processors can also virtual data banks to synchronize both the touch data acquisition and the stylus scan acquisition with the display refresh process.

公开(公告)号：US09557868B2

公开(公告)日：2017-01-31

申请号：US14550784

申请日：2014-11-21

Applicant: Apple Inc.

Inventor： Manu Agarwal ,  Shahrooz Shahparnia ,  Vivek Pant

IPC: G06F3/041 ,  G06F3/045 ,  G06F3/044

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插入在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：US20160259467A1

公开(公告)日：2016-09-08

申请号：US14745344

申请日：2015-06-19

Applicant: Apple Inc.

Inventor： Amit Nayyar ,  Shahrooz Shahparnia

IPC: G06F3/041 ,  G06F1/32 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F1/3262

Abstract: A touch controller can dynamically balance performance criteria, such as signal-to-noise ratio (SNR) thresholds, with power consumption for touch sensitive devices. A touch controller can be configured to reduce power consumption by reconfiguring bank boundaries for an active mode scan so as to reduce the number of banks scanned with a banked active mode scan. Additionally or alternatively, the stimulation signal amplitude and integration time of the touch controller can be dynamically adjusted to balance performance criteria with power consumption. Default integration times and default stimulation signal amplitudes can be increased in higher-noise operating environments to raise SNR, and can be reduced to save power in lower-noise operating environments. Additionally or alternatively, the touch scanning rate of the touch controller can be dynamically adjusted to reduce power consumption of the touch sensitive device or to reallocate touch sensing frames to increase integration times and thereby SNR performance.

Abstract translation: 触摸控制器可以动态平衡诸如信噪比（SNR）阈值的性能标准与触敏设备的功耗。 触摸控制器可以被配置为通过重新配置活动模式扫描的存储体边界来减少功耗，从而减少用存储的主动模式扫描扫描的存储体的数量。 附加地或替代地，可以动态地调整触摸控制器的刺激信号幅度和积分时间，以平衡性能标准与功耗。 在较高噪声的工作环境下，可以增加默认的积分时间和默认的刺激信号幅度，以提高信噪比，并且可以减少在较低噪声的操作环境中节省功率。 附加地或替代地，可以动态地调整触摸控制器的触摸扫描速率以降低触敏设备的功耗或重新分配触摸感测帧以增加集成时间，从而提高SNR性能。

公开(公告)号：US20150035787A1

公开(公告)日：2015-02-05

申请号：US14067870

申请日：2013-10-30

Applicant: Apple Inc.

Inventor： Shahrooz Shahparnia ,  Christoph H. Krah

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G06F1/3262 ,  G06F3/0418

Abstract: Self capacitance touch circuits to cancel the effects of parasitic capacitance in a touch sensitive device are disclosed. One circuit can generate a parasitic capacitance cancelation signal that can be injected into touch sensing circuitry to cancel the parasitic capacitance. Another circuit can adjust the phase and magnitude of the parasitic capacitance cancelation signal based on characteristics of channels in the touch sensing circuitry so as to fine tune the parasitic capacitance cancelations. Another circuit can drive a guard plate and touch panel electrodes so as to cancel the parasitic capacitances between the panel and the plate and between the electrodes.

Abstract translation: 公开了用于消除触敏装置中寄生电容的影响的自电容触摸电路。 一个电路可以产生寄生电容消除信号，该寄生电容消除信号可被注入到触摸感测电路中以抵消寄生电容。 另一电路可以基于触摸感测电路中的通道的特性来调整寄生电容消除信号的相位和幅度，以便微调寄生电容消除。 另一个电路可以驱动保护板和触摸面板电极，以抵消面板和板之间以及电极之间的寄生电容。

公开(公告)号：US20140152582A1

公开(公告)日：2014-06-05

申请号：US13691637

申请日：2012-11-30

Applicant: APPLE INC.

Inventor： Manu Agarwal ,  Shahrooz Shahparnia ,  Martin Paul Grunthaner

IPC: G06F3/033

CPC classification number: G06F3/033 ,  G06F3/03545 ,  G06F3/0418 ,  G06F3/044

Abstract: A touch sensitive device capable of detecting signals generated by a stylus and correcting the detected stylus signals for effects due to noise present on the device is disclosed. In one example, signals are taken from one or more electrodes that are a pre-determined distance away from an electrode in which a stylus signal is detected. The pre-determined distance can be empirically determined such that a noise estimate can be generated such that the electrodes have a higher probability of containing only noise that is highly correlated to the noise present on a detected stylus signal. The generated noise estimate is then subtracted from a detected stylus signal to reduce the effect of noise on the stylus signal.

Abstract translation: 公开了能够检测由触针产生的信号并且由于存在于设备上的噪声的影响来校正检测到的触针信号的触敏设备。 在一个示例中，从一个或多个电极取出信号，这些电极是距离检测到触针信号的电极的预定距离。 可以经验地确定预定距离，使得可以产生噪声估计，使得电极具有更高的概率，其仅包含与检测到的触笔信号上存在的噪声高度相关的噪声。 然后从检测到的触针信号中减去所产生的噪声估计，以减少噪声对触针信号的影响。