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    • 1. 发明授权
    • Dual mode touchpad with a low power mode using a proximity detection mode
    • 使用接近检测模式的低功耗模式的双模式触摸板
    • US08743083B2
    • 2014-06-03
    • US13273167
    • 2011-10-13
    • Jean-Daniel ZanoneMathieu MeisserSimone ArrigoJulien Piot
    • Jean-Daniel ZanoneMathieu MeisserSimone ArrigoJulien Piot
    • G06F3/045
    • G06F3/044G06F1/3231G06F1/3262G06F3/0416G06F3/045G06F2203/04108Y02D10/173
    • A system includes a touchpad sensor array, a touch circuit, and a proximity circuit. The touch circuit executes a touch mode configured to track the position of a user or conductive object on the touchpad sensor array by detecting a change in an electrical property of the touchpad. The proximity circuit executes a proximity detection mode configured to track the position of a user or conductive object near or proximate to the touchpad sensor array by detecting a change in an electrical property of the touchpad. The system is configured to switch from the touch mode to the proximity detection mode after a predetermined period of inactivity, where the proximity detection mode can operate at one or more reduced polling rates, resulting in a reduced overall power dissipation. The system is configured to switch back to the touch mode when activity is detected by the proximity circuit.
    • 系统包括触摸板传感器阵列,触摸电路和接近电路。 触摸电路执行触摸模式,其被配置为通过检测触摸板的电气特性的变化来跟踪触摸板传感器阵列上的用户或导电物体的位置。 接近电路执行接近检测模式,其被配置为通过检测触摸板的电气特性的变化来跟踪触摸板传感器阵列附近或靠近触摸板传感器阵列的用户或导电物体的位置。 该系统被配置为在预定的不活动时间段之后从触摸模式切换到接近检测模式,其中接近检测模式可以以一个或多个降低的轮询速率操作,导致整体功率消耗的降低。 该系统配置为在接近电路检测到活动时切换回触摸模式。