DYNAMIC SWITCHING OF POWER MODES FOR TOUCH SCREENS USING FORCE TOUCH
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    发明申请
    DYNAMIC SWITCHING OF POWER MODES FOR TOUCH SCREENS USING FORCE TOUCH 审中-公开
    用力触摸触摸屏功率模式的动态切换

    公开(公告)号:US20150234446A1

    公开(公告)日:2015-08-20

    申请号:US14624281

    申请日:2015-02-17

    IPC分类号: G06F1/32 G06F3/044 G06F3/041

    摘要: Switching of power modes for touch screens is disclosed. In example embodiments a touch detect mode may be activated for touchscreen operation. The touchscreen may be a projected capacitance screen that includes force sensing based on piezo electric sensors. The touch detect mode may be a low power mode in which at least one channel, but fewer than all channels of the touch screen are monitored. When is determined that a touch event has occurred a switch to a scan mode for touchscreen operation may be performed. Scan mode may be a higher power mode in which all channels of the touch screen are scanned at least for position sensing. The touch detect mode monitoring may be implemented by monitoring the total charge on the at least one channel and providing a voltage signal. When the voltage signal meets predetermined criteria an indication of a touch event may be generated.

    摘要翻译: 公开了触摸屏功率模式的切换。 在示例实施例中,可以激活触摸检测模式用于触摸屏操作。 触摸屏可以是投影电容屏幕,其包括基于压电传感器的力感测。 触摸检测模式可以是低功率模式,其中监视至少一个通道,但是少于触摸屏的所有通道。 当确定触摸事件已经发生时,可以执行切换到用于触摸屏操作的扫描模式。 扫描模式可以是更高的功率模式,其中至少扫描触摸屏的所有通道以进行位置感测。 可以通过监视至少一个通道上的总电荷并提供电压信号来实现触摸检测模式监视。 当电压信号满足预定标准时,可以产生触摸事件的指示。