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公开(公告)号：US11733801B2
公开(公告)日：2023-08-22
申请号：US16146675
申请日：2018-09-28
Applicant: Apple Inc.
Inventor： Brian H. Knabenshue , Albert Lin , Jason C. Hu , Christian M. Sauer , Martin Paul Grunthaner
CPC classification number: G06F3/041662 , G06F3/0442 , G06F3/0445 , G06F3/0446 , G06F3/0448 , G06F3/04162 , G06F3/04164 , G06F2203/04105 , G06F2203/04106 , G06F2203/04107 , G06F2203/04108
Abstract: A touch sensor panel is disclosed. The touch sensor panel includes a first layer including a plurality of electrodes of a first type that are coupled to respective traces and are configured to operate as touch sensing electrodes during a first time period. The touch sensor panel also includes a second layer including a plurality of electrodes of a second type overlapping with the respective traces of the electrodes of the first type. The electrodes of the second type are configured to operate as guard electrodes for the respective traces of the electrodes of the first type during the first time period and operate as touch sensing electrodes during a second time period.
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公开(公告)号：US09880664B2
公开(公告)日：2018-01-30
申请号：US14864351
申请日：2015-09-24
Applicant: Apple Inc.
Inventor： Manu Agarwal , Jason C. Hu , Dhaval Patel , Shahrooz Shahparnia , Sumant Ranganathan
CPC classification number: G06F3/0418 , G06F3/0414 , G06F3/044 , G06F2203/04106
Abstract: Noise in sensor panel measurements can be reduced using a common pixel correction algorithm. Noise can be introduced into touch or force sensor panel measurements, for example, by circuitry of a transmit (Tx) section or a receive (Rx) section coupled to one or more sensing nodes of a sensor panel. For example, a digital-to-analog converter in the transmit section or an analog-to-digital converter in the receive section can introduce low-frequency correlated noise. Additionally, transmit and receive sections can introduce uncorrelated noise into the system. Reference nodes, coupled between Tx and Rx sections, can sense correlated and uncorrelated noise from the Tx and Rx sections. The noise measured at reference nodes can be subtract from signals measured at other sensing nodes coupled to the same Rx channel. The measurement at the reference node can be scaled using a scaling parameter to account for differences between reference nodes and sensing nodes.
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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
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.
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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
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.
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