Capacitive sensor coupling correction
    7.
    发明授权
    Capacitive sensor coupling correction 有权
    电容传感器耦合校正

    公开(公告)号:US08300019B2

    公开(公告)日:2012-10-30

    申请号:US12173730

    申请日:2008-07-15

    IPC分类号: G06F3/041 G06F3/044

    摘要: Methods and apparatus for normalizing the effects of the changes to the parasitic capacitive coupling that can occur in touch sensor panels so as to reduce or eliminate the appearance of erroneous touch events. In some embodiments, at some time prior to regular device use (e.g. during factory calibration), a conductive sheet is initially positioned so as to entirely cover a touch surface of a touch sensor panel. A set of sensed signals may be determined upon driving the drive lines and sensing the sense lines of the panel. Correctional coefficients may then be calculated based in part upon the difference between a sensed signal and an expected signal. The correctional coefficients may then be stored in the device and used to determine signal corrections for a set of measured signals during normal operation.

    摘要翻译: 对接触传感器面板中可能发生的寄生电容耦合的变化的影响进行归一化的方法和装置,以便减少或消除错误触摸事件的出现。 在一些实施例中,在常规设备使用之前的某个时间(例如在工厂校准期间),导电片最初被定位成完全覆盖触摸传感器面板的触摸表面。 可以在驱动驱动线并感测面板的感测线时确定一组感测信号。 然后可以部分地基于感测信号和期望信号之间的差异来计算校正系数。 校正系数然后可以存储在设备中,并用于在正常操作期间确定一组测量信号的信号校正。