公开(公告)号：US09524697B2

公开(公告)日：2016-12-20

申请号：US14474960

申请日：2014-09-02

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Kusuma Adi Ningrat ,  Giuseppe Noviello ,  Jenn Woei Soo ,  Lokesh Kumar Korapati

IPC: G09G5/12 ,  G06F3/044

CPC classification number: G09G5/12 ,  G06F3/044 ,  G09G2320/0247

Abstract: A video display includes a video display panel and a video display drive circuit configured to control a display on condition. A touch screen includes a touch screen panel (mounted on top of the video display panel) and a touch panel control and sense circuit configured to operate the touch screen panel in a self-capacitance mode. The touch panel control and sense circuit includes sense drive circuits configured to generate sense drive signals for application to sense lines of the touch screen panel. A controller controls actuation of the sense drive circuits so that the sense drive signals are synchronized to the display on condition. In an implementation, the leading edges of the sense drive signals are synchronized to the display on condition. In another implementation, a window is synchronized to the display on condition and the leading edges of the sense drive signals exhibit jitter within the window.

Abstract translation: 视频显示器包括视频显示面板和视频显示驱动电路，视频显示驱动电路被配置为控制显示状态。 触摸屏包括触摸屏面板（安装在视频显示面板的顶部）以及触摸面板控制和感测电路，被配置为以自电容模式操作触摸屏面板。 触摸面板控制和感测电路包括感测驱动电路，其被配置为产生感测驱动信号以用于感测触摸屏面板的线。 控制器控制感测驱动电路的致动，使得感测驱动信号在状态下与显示器同步。 在一个实现中，感测驱动信号的前沿在状态下与显示器同步。 在另一实现中，窗口在条件下与显示器同步，并且感测驱动信号的前沿在窗口内呈现抖动。

公开(公告)号：US20160077625A1

公开(公告)日：2016-03-17

申请号：US14484372

申请日：2014-09-12

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Jenn Woei Soo ,  Kusuma Adi Ningrat

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G06F2203/04108

Abstract: A capacitive touch system generates data indicative of sensed capacitance measured at capacitive sensing nodes of a capacitive touch panel. A signal processing circuit is coupled to receive the data indicative of sensed capacitance from the capacitive touch system. The signal processing circuit operates to fit a parabolic curve to the data indicative of sensed capacitance. A sharpness of the fit parabolic curve is indicative of whether touch versus hover interaction with the capacitive touch panel. A touch detection threshold is as a function of the determined sharpness. The set touch detection threshold is then applied against the data indicative of sensed capacitance in order to make a touch detection.

Abstract translation: 电容式触摸系统产生指示在电容式触摸面板的电容感测节点处测量的感测电容的数据。 信号处理电路被耦合以从电容式触摸系统接收指示感测电容的数据。 信号处理电路用于将抛物线曲线拟合到指示感测电容的数据。 合适的抛物线曲线的清晰度表示触摸与悬浮与电容式触摸面板的相互作用。 触摸检测阈值是确定的清晰度的函数。 然后针对指示感测电容的数据施加设置的触摸检测阈值，以进行触摸检测。

公开(公告)号：US12119968B2

公开(公告)日：2024-10-15

申请号：US18364308

申请日：2023-08-02

Applicant: STMicroelectronics Asia Pacific Pte Ltd.

Inventor： Ade Putra ,  Kusuma Adi Ningrat ,  Mythreyi Nagarajan

IPC: H04L27/22 ,  G06F3/041 ,  H03M1/12

CPC classification number: H04L27/22 ,  G06F3/04162 ,  G06F3/04166 ,  H03M1/124

Abstract: A device includes an analog to digital converter configured to convert voltages into a digital signal by sampling the voltages at a fixed sampling time; a first multiplier configured to multiply the digital signal with in-phase coefficients, the in-phase coefficients generated to produce a demodulated in-phase signal at a demodulation signal frequency; a first adder configured accumulate the demodulated in-phase signal to output in-phase magnitude values; a second multiplier configured to multiply the digital signal with quadrature coefficients, the quadrature coefficients generated to produce a demodulated quadrature signal at the demodulation signal frequency; and a second adder configured to accumulate the demodulated quadrature signal to output quadrature magnitude values.

公开(公告)号：US11301097B2

公开(公告)日：2022-04-12

申请号：US17230317

申请日：2021-04-14

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Kusuma Adi Ningrat ,  Cam Chung La

IPC: G06F3/044 ,  G06F3/0488 ,  G06F3/041 ,  G06F3/04883

Abstract: A touch-screen-controller (TSC) performs mutual sensing to acquire touch strength values from a touch matrix formed by capacitively intersecting conductive lines. For each line, the TSC generates an emulated self capacitance value from an associated touch strength value based upon a position of that line compared to a location on the touch matrix adjacent to which a first touch type is expected to occur, and determines presence of the first touch type adjacent to the touch matrix based upon the emulated values. The emulated values for each conductive line may be weighted based upon its closeness to the location where the first touch type is expected to occur. The weighting may be zero if its associated conductive line is outside of the location where the first touch type is expected to occur, and may be one if inside of the location where the first touch type is expected to occur.

公开(公告)号：US10120514B2

公开(公告)日：2018-11-06

申请号：US15191714

申请日：2016-06-24

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Kusuma Adi Ningrat ,  Giuseppe Noviello ,  John Serge Georges Nankoo

IPC: G06F3/044

Abstract: An electronic device includes a flexible substrate. The flexible substrate includes a first portion having a plurality of first conductive lines formed thereon, a second portion having a plurality of second conductive lines formed thereon, and an intermediate portion mechanically coupling the first portion to the second portion. The intermediate portion is configured to permit folding so that the first and second portions can be arranged back-to-back or face-to-face such that plurality of the second conductive lines and plurality of first conductive lines are oriented so as to cross one another to thereby form a capacitive sensing panel. A single connector is mechanically coupled to the first portion or the second portion, and electrically coupled to the first portion and the second portion but not electrically coupling the first portion to the second portion.

公开(公告)号：US09817530B2

公开(公告)日：2017-11-14

申请号：US14840556

申请日：2015-08-31

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD

Inventor： Kusuma Adi Ningrat ,  Lokesh Kumar Korapati ,  Jerry Kim

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

CPC classification number: G06F3/044 ,  G06F3/0418

Abstract: An electronic device may include a touchscreen having sensing capacitors, and readout circuitry. The readout circuitry may be configured to accumulate a sample set from each sensing capacitor, divide the sample set into sample subsets, remove a given sample subset when the given sample subset exceeds a threshold, and process remaining sample subsets for touch input.

公开(公告)号：US20160378222A1

公开(公告)日：2016-12-29

申请号：US14753129

申请日：2015-06-29

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Chee Weng Cheong ,  EngJye Ng ,  Dianbo Guo ,  Chaochao Zhang ,  Kusuma Adi Ningrat

IPC: G06F3/044

CPC classification number: G06F3/044

Abstract: A charge sensing circuit generates a voltage in a sensing period that is indicative of sensed charge. The generated voltages are accumulated by an accumulator circuit over a number of sensing periods. A noise detection circuit senses when the voltage generated by the charge sensing circuit is outside of a boundary and generates a detection signal in response thereto. A control circuit, in response to the detection signal, controls the accumulator circuit to block accumulation of the voltages generated by the charge sensing circuit during at least the sensing period in which the detection signal is generated. An analog-to-digital converter circuit then converts an accumulated output voltage from the accumulator circuit to a digital value at the end of an accumulation time period that includes the sensing periods. The end of the accumulation time period is delayed by at least one sensing period in response to the detection signal.

Abstract translation: 电荷感测电路在感测周期中产生指示感测电荷的电压。 所产生的电压在多个感测周期上由累加器电路累积。 噪声检测电路检测由电荷感测电路产生的电压何时在边界之外，并响应于此产生检测信号。 响应于检测信号，控制电路在至少产生检测信号的感测周期期间控制累加器电路阻止由电荷感测电路产生的电压的累积。 然后，模数转换器电路在包括感测周期的累积时间周期结束时将来自累加器电路的累积输出电压转换为数字值。 积累时间段的结束响应于检测信号延迟至少一个感测周期。

公开(公告)号：US09178545B2

公开(公告)日：2015-11-03

申请号：US13861057

申请日：2013-04-11

Applicant: STMicroelectronics Asia Pacific Pte. Ltd.

Inventor： Hon Siong Ng ,  Kusuma Adi Ningrat ,  Praveesh Chandran

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

CPC classification number: H04B1/1027 ,  H03H17/0294 ,  H03H17/04

Abstract: 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.

Abstract translation: 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

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE. LTD.

Inventor： Hon Siong Ng ,  Kusuma Adi Ningrat ,  Praveesh Chandran

IPC: H04B1/10

CPC classification number: H04B1/1027 ,  H03H17/0294 ,  H03H17/04

Abstract: 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.

Abstract translation: 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：US11765006B2

公开(公告)日：2023-09-19

申请号：US17245890

申请日：2021-04-30

Applicant: STMicroelectronics Asia Pacific Pte Ltd.

Inventor： Ade Putra ,  Kusuma Adi Ningrat ,  Mythreyi Nagarajan

IPC: H04L27/22 ,  G06F3/041 ,  H03M1/12

CPC classification number: H04L27/22 ,  G06F3/04162 ,  G06F3/04166 ,  H03M1/124

Abstract: A device includes an analog to digital converter configured to convert voltages into a digital signal by sampling the voltages at a fixed sampling time; a first multiplier configured to multiply the digital signal with in-phase coefficients, the in-phase coefficients generated to produce a demodulated in-phase signal at a demodulation signal frequency; a first adder configured accumulate the demodulated in-phase signal to output in-phase magnitude values; a second multiplier configured to multiply the digital signal with quadrature coefficients, the quadrature coefficients generated to produce a demodulated quadrature signal at the demodulation signal frequency; and a second adder configured to accumulate the demodulated quadrature signal to output quadrature magnitude values.