Touch panel excitation using a drive signal having time-varying characteristics
    1.
    发明授权
    Touch panel excitation using a drive signal having time-varying characteristics 有权
    使用具有时变特性的驱动信号进行触摸屏激励

    公开(公告)号:US09098153B2

    公开(公告)日:2015-08-04

    申请号:US13571765

    申请日:2012-08-10

    IPC分类号: G06F3/045 G06F3/041 G06F3/044

    摘要: A capacitive touch panel may include a driver and a drive electrode configured to be connected to the driver. The driver is configured to power the drive electrode with a drive signal having a first signal characteristic during a first time interval, and a second signal characteristic different from the first signal characteristic during a second time interval subsequent to the first time interval. The first signal characteristic may comprise one or more of a first frequency, a first phase, or a first amplitude during the first time interval, and the second signal characteristic may comprise one or more of a second frequency, a second phase, or a second amplitude, where one or more of the first frequency, first phase, or first amplitude may be different from one or more of the second frequency, second phase, or second amplitude, respectively.

    摘要翻译: 电容式触摸面板可以包括被配置为连接到驱动器的驱动器和驱动电极。 驱动器被配置为在第一时间间隔期间具有第一信号特性的驱动信号和在第一时间间隔之后的第二时间间隔期间与第一信号特性不同的第二信号特性为驱动电极供电。 第一信号特征可以在第一时间间隔期间包括第一频率,第一相位或第一幅度中的一个或多个,并且第二信号特征可以包括第二频率,第二相位或第二频率中的一个或多个 幅度,其中第一频率,第一相位或第一幅度中的一个或多个可以分别与第二频率,第二相位或第二幅度中的一个或多个不同。

    Background noise measurement and frequency selection in touch panel sensor systems
    2.
    发明授权
    Background noise measurement and frequency selection in touch panel sensor systems 有权
    背景噪声测量和触摸屏传感器系统中的频率选择

    公开(公告)号:US08860432B2

    公开(公告)日:2014-10-14

    申请号:US13401995

    申请日:2012-02-22

    IPC分类号: G01R29/26 G06F3/041

    CPC分类号: G06F3/0418 G06F3/044

    摘要: A touch panel sensor system that can dynamically measure noise and automatically switch to a frequency with minimal noise is described. The touch panel sensor system includes a sensor configured to detect a change in capacitance associated with a touch upon a touch panel. The system also includes a drive module configured to generate a drive signal having a first waveform characteristic (e.g., signal having a periodic waveform characteristic) during a first phase (e.g., sensor phase) and a second drive signal having a second waveform characteristic (e.g., constant voltage signal) during a second phase (e.g., noise detection phase). The first and second drive signals are configured to drive the sensor. The system also includes a measuring module coupled to the sensor that is configured to measure noise having the first waveform characteristic (e.g., periodic waveform characteristic) during the second phase.

    摘要翻译: 描述了可以动态地测量噪声并且以最小噪声自动切换到频率的触摸屏传感器系统。 触摸面板传感器系统包括被配置为检测与触摸面板上的触摸相关联的电容的变化的传感器。 该系统还包括驱动模块,该驱动模块被配置为在第一阶段(例如,传感器相位)期间产生具有第一波形特征的驱动信号(例如具有周期性波形特性的信号)和具有第二波形特性的第二驱动信号(例如, ,恒定电压信号)在第二阶段(例如,噪声检测阶段)。 第一和第二驱动信号被配置为驱动传感器。 该系统还包括耦合到传感器的测量模块,该测量模块被配置成在第二阶段期间测量具有第一波形特性(例如周期性波形特性)的噪声。

    CAPACITIVE TOUCH SENSE ARCHITECTURE
    3.
    发明申请
    CAPACITIVE TOUCH SENSE ARCHITECTURE 有权
    电容触摸感知架构

    公开(公告)号:US20130162586A1

    公开(公告)日:2013-06-27

    申请号:US13403873

    申请日:2012-02-23

    IPC分类号: G01R27/26 G06F3/044

    摘要: An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes a discrete mixer and a discrete integrator. The excitation signal is also input to the mixer such that the modulated signal is multiplied by the excitation signal. The excitation signal is an analog signal having a sine wave function or other waveform.

    摘要翻译: 模拟前端电路在电容测量应用中使用相干检测。 模拟前端电路使用相干检测来测量触摸屏显示器的电容。 模拟激励信号由要测量的电容器调制。 调制信号使用相关器进行同步解调,相关器包括离散混频器和离散积分器。 激励信号也被输入到混频器,使得调制信号与激励信号相乘。 激励信号是具有正弦波函数或其他波形的模拟信号。

    MIXED-SIGNAL INTEGRATOR ARCHITECTURE
    5.
    发明申请
    MIXED-SIGNAL INTEGRATOR ARCHITECTURE 有权
    混合信号整合器架构

    公开(公告)号:US20120274404A1

    公开(公告)日:2012-11-01

    申请号:US13404722

    申请日:2012-02-24

    IPC分类号: H03F1/34

    摘要: A mixed signal correlator utilizes coherent detection within a capacitance measurement application. In some applications, the mixed signal correlator is used to measure capacitance of a touch screen display. An external capacitor whose capacitance is measured is kept small for improved sensitivity and can be used for a variety of applications having varied integration periods for measurement. The external capacitor is kept small and can be used for varied applications by adjusting the output voltage within a range that is less than the supply voltage, and maintaining a count of the adjustments to later reconstruct an actual output voltage for the integration period. An output is a weighted sum of an analog integrator output and a digital counter output.

    摘要翻译: 混合信号相关器在电容测量应用中利用相干检测。 在一些应用中,混合信号相关器用于测量触摸屏显示器的电容。 测量电容的外部电容器保持较小,以提高灵敏度,并且可以用于具有不同的测量积分周期的各种应用。 外部电容器保持较小,可以通过将输出电压调整到小于电源电压的范围内,并且保持调整次数以便在整合期间重建实际输出电压,可用于各种应用。 输出是模拟积分器输出和数字计数器输出的加权和。

    CANCELLING TOUCH PANEL OFFSET OF A TOUCH PANEL SENSOR
    6.
    发明申请
    CANCELLING TOUCH PANEL OFFSET OF A TOUCH PANEL SENSOR 审中-公开
    取消触摸面板传感器的触控面板偏移

    公开(公告)号:US20120218222A1

    公开(公告)日:2012-08-30

    申请号:US13402485

    申请日:2012-02-22

    IPC分类号: G06F3/044

    CPC分类号: G06F3/044 G06F3/0418

    摘要: A touch panel sensor system for increasing the dynamic range of the system is disclosed. The touch panel sensor system comprises a sensor driver module for driving one or more sensors of a touchscreen and an offset cancellation driver module for driving an offset cancellation module. The signals generated by the sensors and the offset cancellation module are coupled to a measuring module at a node (N1). The signal generated by the offset cancellation drivers can be adjusted so that the waveform characteristics (e.g., amplitude and phase) of the signal generated by the offset cancellation drivers in combination with the offset cancellation module can at least partially cancel parasitic and sensor capacitances (Cs) of the sensors of the touch panel. A measuring module may then detect a touch event capacitance (CΔ) at the node (N1).

    摘要翻译: 公开了一种用于增加系统的动态范围的触摸面板传感器系统。 触摸屏传感器系统包括用于驱动触摸屏的一个或多个传感器的传感器驱动器模块和用于驱动偏移消除模块的偏移消除驱动器模块。 由传感器和偏移消除模块产生的信号耦合到节点(N1)处的测量模块。 可以调整由偏移消除驱动器产生的信号,使得由偏移消除驱动器产生的信号的波形特性(例如,幅度和相位)与偏移消除模块组合可以至少部分地抵消寄生和传感器电容(Cs )触摸面板的传感器。 然后,测量模块可以检测节点(N1)处的触摸事件电容(C&Dgr)。

    Dynamic frequency synthesizer configuration
    7.
    发明授权
    Dynamic frequency synthesizer configuration 有权
    动态频率合成器配置

    公开(公告)号:US07197283B1

    公开(公告)日:2007-03-27

    申请号:US10227632

    申请日:2002-08-22

    IPC分类号: H04B1/40 H04B1/16

    CPC分类号: H03L7/18 H03L7/1974

    摘要: A system and method are disclosed for configuring a frequency synthesizer to generate a frequency. Configuring a frequency synthesizer to generate a frequency includes transferring channel information that identifies the frequency to be generated from an external processor to the frequency synthesizer; generating a plurality of synthesizer configuration parameters based on the channel information; and configuring the frequency synthesizer using the plurality of synthesizer configuration parameters. Additionally, the frequency synthesizer configuration parameters can be generated using an iterative process with seed values.

    摘要翻译: 公开了一种用于配置频率合成器以产生频率的系统和方法。 配置频率合成器以产生频率包括将标识要从外部处理器产生的频率的信道信息传送到频率合成器; 基于所述信道信息生成多个合成器配置参数; 以及使用所述多个合成器配置参数来配置所述频率合成器。 另外,可以使用具有种子值的迭代过程来生成频率合成器配置参数。

    Continuous time correlator architecture
    8.
    发明授权
    Continuous time correlator architecture 有权
    连续时间相关器架构

    公开(公告)号:US08643619B2

    公开(公告)日:2014-02-04

    申请号:US13404594

    申请日:2012-02-24

    IPC分类号: G06F3/041

    摘要: An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes an integrated mixing and integration circuit. The correlator includes a programmable impedance element that generates a time-varying conductance according to a controlling digitized waveform.

    摘要翻译: 模拟前端电路在电容测量应用中使用相干检测。 模拟前端电路使用相干检测来测量触摸屏显示器的电容。 模拟激励信号由要测量的电容器调制。 调制信号使用相关器进行同步解调,相关器包括一个集成的混合和积分电路。 相关器包括根据控制数字化波形产生时变电导的可编程阻抗元件。

    CALIBRATION FOR MIXED-SIGNAL INTEGRATOR ARCHITECTURE
    9.
    发明申请
    CALIBRATION FOR MIXED-SIGNAL INTEGRATOR ARCHITECTURE 有权
    混合信号整合器架构的校准

    公开(公告)号:US20120218020A1

    公开(公告)日:2012-08-30

    申请号:US13404817

    申请日:2012-02-24

    IPC分类号: G06G7/184

    摘要: A mixed signal correlator utilizes coherent detection within a capacitance measurement application. In some applications, the mixed signal correlator is used to measure capacitance of a touch screen display. An external capacitor whose capacitance is measured is kept small for improved sensitivity and can be used for a variety of applications having varied integration periods for measurement. The external capacitor is kept small and can be used for varied applications by adjusting the output voltage within a range that is less than the supply voltage, and maintaining a count of the adjustments to later reconstruct an actual output voltage for the integration period. An output is a weighted sum of an analog integrator output and a digital counter output.

    摘要翻译: 混合信号相关器在电容测量应用中利用相干检测。 在一些应用中,混合信号相关器用于测量触摸屏显示器的电容。 测量电容的外部电容器保持较小,以提高灵敏度,并且可以用于具有不同的测量积分周期的各种应用。 外部电容器保持较小,可以通过将输出电压调整到小于电源电压的范围内,并且保持调整次数以便在整合期间重建实际输出电压,可用于各种应用。 输出是模拟积分器输出和数字计数器输出的加权和。

    Complex multiplex feedback filter
    10.
    发明授权
    Complex multiplex feedback filter 失效
    复数多反馈滤波器

    公开(公告)号:US07587445B2

    公开(公告)日:2009-09-08

    申请号:US11253478

    申请日:2005-10-18

    IPC分类号: G06G7/02

    CPC分类号: H03H11/22 H03H2011/0494

    摘要: A complex filter includes an I channel having a first I channel output and a second I channel output and a Q channel having a first Q channel output and a second Q channel output. The second I channel output is input to the Q channel through a first passive network and wherein the second Q channel output is input to the I channel through a second passive network.

    摘要翻译: 复数滤波器包括具有第一I信道输出和第二I信道输出的I信道和具有第一Q信道输出和第二Q信道输出的Q信道。 第二I通道输出通过第一无源网络输入到Q通道,并且其中第二Q通道输出通过第二无源网络输入到I通道。