公开(公告)号：US20180292933A1

公开(公告)日：2018-10-11

申请号：US15484958

申请日：2017-04-11

Applicant: Apple Inc.

Inventor： Jason C. Hu ,  Manu Agarwal

IPC: G06F3/045 ,  G01L5/22 ,  G01L1/20 ,  G06F3/041

CPC classification number: G01L1/205 ,  G01L1/2262 ,  G06F3/0414 ,  G06F3/0416

Abstract: Disclosed herein are structures, devices, and methods for sensing physical parameters, such as strain in a surface, using resistance-based parameter sensors and current sensing. An applied strain can cause a differential change in one or more currents from two resistors configured in parallel in the sensor. Strain can be inferred from a ratio of the difference of the two currents to a sum of the two currents. These structures and methods can be adapted to measure strain or other parameters using an array of sensors, with common voltages applied to rows of the array, and currents being summed in column in the array so that fewer receivers are needed.

公开(公告)号：US09910533B2

公开(公告)日：2018-03-06

申请号：US14866797

申请日：2015-09-25

Applicant: Apple Inc.

Inventor： Manu Agarwal ,  Hopil Bae ,  Kingsuk Brahma

IPC: G06F3/041 ,  G09G3/00 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/044 ,  G09G3/00 ,  G09G3/2022 ,  G09G3/2096 ,  G09G2330/021 ,  G09G2340/0435

Abstract: Various timing schemes can be used to synchronizing display functions with touch and/or stylus sensing functions for devices including a variable refresh rate (VRR) display. In a continuous-touch mode, for example, extended blanking can result in frame judder due to mismatch or latency between reporting of sensing data and the display. To minimize these issues, sensing operations can reset to re-synchronize with the display operation, and unreported data from sensing scans can be discarded or ignored. In some examples, a display frame can be divided into two sub-frames, and a system can be configured to perform a touch sensing scan during the first sub-frame of a display frame. At the conclusion of extended blanking, the sensing operations can reset to re-synchronize with the display. The touch sensing scan can be completed in one intra-frame pause and can begin at the start of the display frame.

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：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。

公开(公告)号：US20200274403A1

公开(公告)日：2020-08-27

申请号：US16872172

申请日：2020-05-11

Applicant: Apple Inc.

Inventor： Moshe H. Malkin ,  Manu Agarwal ,  Brandon R. Garbus

IPC: H02J50/80 ,  H02J50/12 ,  H04B5/00

Abstract: A wireless power transmitting device transmits wireless power signals modulated at a given power frequency to a wireless power receiving device using a wireless power transmitting coil. The wireless power receiving device may transmit data signals to the wireless power transmitting device. The wireless power transmitting device may include a data receiver that is coupled to the wireless power transmitting coil and that receives the transmitted data. The data receiver may include an input stage, bandpass filter circuitry, demodulator circuitry, and a data stream combiner. The data receiver may further include a power supply noise cancellation circuit. The power supply noise cancellation circuit may include an input stage, a baseband filter, a window filter, a down-sampler, and a difference filter. The power supply noise cancellation circuit may be coupled to the data stream combiner and is configured to mitigate power supply noise interference in the received data.

公开(公告)号：US10459546B2

公开(公告)日：2019-10-29

申请号：US13830127

申请日：2013-03-14

Applicant: Apple Inc.

Inventor： Shahrooz Shahparnia ,  Kevin J. White ,  Manu Agarwal

IPC: G06F3/041 ,  G06F3/046 ,  G06F3/0354

Abstract: A touch input device configured to detect stylus signals generated by an external stylus is provided. The touch input device includes a plurality of stylus signal detectors that receive at its input a combination of stylus receive channels that are combined in a manner to minimize noise while at the same time keeping the stylus signal strength uniform independent of the position of the stylus on the device.

公开(公告)号：US10444091B2

公开(公告)日：2019-10-15

申请号：US15484958

申请日：2017-04-11

Applicant: Apple Inc.

Inventor： Jason C. Hu ,  Manu Agarwal

IPC: G01L1/20 ,  G01L5/22 ,  G06F3/041

Abstract: Disclosed herein are structures, devices, and methods for sensing physical parameters, such as strain in a surface, using resistance-based parameter sensors and current sensing. An applied strain can cause a differential change in one or more currents from two resistors configured in parallel in the sensor. Strain can be inferred from a ratio of the difference of the two currents to a sum of the two currents. These structures and methods can be adapted to measure strain or other parameters using an array of sensors, with common voltages applied to rows of the array, and currents being summed in column in the array so that fewer receivers are needed.

公开(公告)号：US10318089B2

公开(公告)日：2019-06-11

申请号：US15274663

申请日：2016-09-23

Applicant: Apple Inc.

Inventor： John Stephen Smith ,  Manu Agarwal ,  Christian M. Sauer

IPC: G06F3/045 ,  G01L1/20 ,  G01L1/22

Abstract: Several techniques for driving a force sensor to reduce common mode offset are disclosed. The force sensor can include at least one set of individual strain sensitive structures formed on or in a surface of a substrate. Each set of individual strain sensitive structures can include one or more strain sensitive structures. At least one external resistor is operably connected in series between a first output of one or more transmitter channels and at least one set of strain sensitive structures. The external resistor(s) effectively increases the resistances of the strain sensitive structures to reduce the common mode offset. Additionally or alternatively, one or more signal generators may be connected to one or more transmitter channels. Each signal generator is configured to produce one or more signals that is/are designed to reduce common mode offset.

公开(公告)号：US10067575B2

公开(公告)日：2018-09-04

申请号：US13691637

申请日：2012-11-30

Applicant: Apple Inc.

Inventor： Manu Agarwal ,  Shahrooz Shahparnia ,  Martin Paul Grunthaner

IPC: G06F3/033 ,  G06F3/041 ,  G06F3/044 ,  G06F3/0354

Abstract: A touch sensitive device can be capable of detecting signals generated by a stylus and correcting the detected stylus signals for effects due to noise present on the device. 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.

公开(公告)号：US20170010723A1

公开(公告)日：2017-01-12

申请号：US15274663

申请日：2016-09-23

Applicant: Apple Inc.

Inventor： John Stephen Smith ,  Manu Agarwal ,  Christian M. Sauer

IPC: G06F3/045

CPC classification number: G06F3/045 ,  G01L1/205 ,  G01L1/225

Abstract: Several techniques for driving a force sensor to reduce common mode offset are disclosed. The force sensor can include at least one set of individual strain sensitive structures formed on or in a surface of a substrate. Each set of individual strain sensitive structures can include one or more strain sensitive structures. At least one external resistor is operably connected in series between a first output of one or more transmitter channels and at least one set of strain sensitive structures. The external resistor(s) effectively increases the resistances of the strain sensitive structures to reduce the common mode offset. Additionally or alternatively, one or more signal generators may be connected to one or more transmitter channels. Each signal generator is configured to produce one or more signals that is/are designed to reduce common mode offset.

Abstract translation: 公开了用于驱动力传感器以减少共模偏移的几种技术。 力传感器可以包括形成在基底表面上或表面上的至少一组单独的应变敏感结构。 每组单个应变敏感结构可以包括一个或多个应变敏感结构。 至少一个外部电阻器可操作地连接在一个或多个发射器通道的第一输出端与至少一组应变敏感结构之间。 外部电阻有效地增加了应变敏感结构的电阻以减小共模偏移。 附加地或替代地，一个或多个信号发生器可以连接到一个或多个发射器通道。 每个信号发生器被配置成产生被设计为减少共模偏移的一个或多个信号。