公开(公告)号：US11422663B1

公开(公告)日：2022-08-23

申请号：US17332357

申请日：2021-05-27

申请人： STMicroelectronics Asia Pacific Pte Ltd.

发明人： Kien Beng Tan ,  Eng Jye Ng ,  Hon Siong Ng ,  Tong Tee Tan

IPC分类号： G06F3/044 ,  G06F3/041

摘要： In an example, a method of sensing on a touchscreen including a plurality of touch sensors arranged in rows and columns on the touchscreen is described. The method includes detecting a passive touch on the touchscreen and a positon of an active stylus; determining a plurality of locations across the touchscreen corresponding to the passive touch and a positon of the active stylus, where each of the plurality of locations corresponds to a location of one of the plurality of touch sensors. The method includes transmitting a first uplink signal to a first group of the plurality of locations including a first fraction of the plurality of locations; and transmitting a second uplink signal to a second group of the plurality of locations including a second fraction of the plurality of locations, the first uplink signal being different from the second uplink signal.

公开(公告)号：US09178545B2

公开(公告)日：2015-11-03

申请号：US13861057

申请日：2013-04-11

申请人： STMicroelectronics Asia Pacific Pte. Ltd.

发明人： Hon Siong Ng ,  Kusuma Adi Ningrat ,  Praveesh Chandran

IPC分类号： H03H7/30 ,  H03H7/40 ,  H03K5/159 ,  H04B1/10

CPC分类号： H04B1/1027 ,  H03H17/0294 ,  H03H17/04

摘要： A digital filter receives a sequence of input signal values. A filtering block performs a filtering operation on sequence of input signal values that is controlled by filter coefficients. A control block also receives the sequence of input signal values. The control block evaluates detected changes over time with respect to the sequence of input signal values and selects values for the filter coefficients based on the detected changes. The detected change over time provides an indication of the whether the sequence of input signal values is changing signal state. If so, the filter coefficients are selected to emphasize signal response time over signal noise filtering for the filtering operation. Otherwise, the filter coefficients are selected to emphasize signal noise filtering over signal response time for the filtering operation.

摘要翻译： 数字滤波器接收输入信号值的序列。 滤波块对由滤波器系数控制的输入信号值的序列执行滤波操作。 控制块还接收输入信号值的序列。 控制块根据输入信号值的序列来评估随时间的检测到的变化，并且基于检测到的变化来选择滤波器系数的值。 检测到的随时间的变化提供输入信号值的序列是否正在改变信号状态的指示。 如果是这样，则选择滤波器系数以强调针对滤波操作的信号噪声滤波的信号响应时间。 否则，滤波器系数被选择为强调用于滤波操作的信号响应时间的信号噪声滤波。

公开(公告)号：US20140307840A1

公开(公告)日：2014-10-16

申请号：US13861057

申请日：2013-04-11

申请人： STMICROELECTRONICS ASIA PACIFIC PTE. LTD.

发明人： Hon Siong Ng ,  Kusuma Adi Ningrat ,  Praveesh Chandran

IPC分类号： H04B1/10

CPC分类号： H04B1/1027 ,  H03H17/0294 ,  H03H17/04

摘要： A digital filter receives a sequence of input signal values. A filtering block performs a filtering operation on sequence of input signal values that is controlled by filter coefficients. A control block also receives the sequence of input signal values. The control block evaluates detected changes over time with respect to the sequence of input signal values and selects values for the filter coefficients based on the detected changes. The detected change over time provides an indication of the whether the sequence of input signal values is changing signal state. If so, the filter coefficients are selected to emphasize signal response time over signal noise filtering for the filtering operation. Otherwise, the filter coefficients are selected to emphasize signal noise filtering over signal response time for the filtering operation.

摘要翻译： 数字滤波器接收输入信号值的序列。 滤波块对由滤波器系数控制的输入信号值的序列执行滤波操作。 控制块还接收输入信号值的序列。 控制块根据输入信号值的序列来评估随时间的检测到的变化，并且基于检测到的变化来选择滤波器系数的值。 检测到的随时间的变化提供输入信号值的序列是否正在改变信号状态的指示。 如果是这样，则选择滤波器系数以强调针对滤波操作的信号噪声滤波的信号响应时间。 否则，滤波器系数被选择为强调用于滤波操作的信号响应时间的信号噪声滤波。