Touch panel input apparatus performing a sampling operation
intermittently
    6.
    发明授权
    Touch panel input apparatus performing a sampling operation intermittently 失效
    触摸面板输入装置间歇地执行采样操作

    公开(公告)号:US5777604A

    公开(公告)日:1998-07-07

    申请号:US467294

    申请日:1995-06-06

    CPC分类号: G06F3/045

    摘要: A touch panel input apparatus has a touch panel which consists of X- and Y-direction electrode panels. When the apparatus is in a power-off state, one end of the X electrode panel is intermittently connected to a power source and one end of the Y electrode panel is intermittently grounded via an output resistor, in response to control signals outputted from a sampling circuit. In this state, synchronously with a clock signal, the sampling circuit performs sampling of a voltage developed across the output resistor when the two electrode panels are brought into contact. The sampling circuit outputs a power-on instruction signal to make the CPU perform the power-on operation. The sampling circuit stops its sampling operation once power is turned on.

    摘要翻译: 触摸面板输入装置具有由X方向和Y方向电极面板组成的触摸面板。 当设备处于断电状态时,X电极面板的一端间歇地连接到电源,并且响应于从采样输出的控制信号,Y电极面板的一端经由输出电阻器间歇地接地 电路。 在这种状态下,与时钟信号同步,当两个电极板接触时,采样电路对输出电阻器两端产生的电压进行采样。 采样电路输出上电指令信号,使CPU执行上电操作。 电源打开后,采样电路停止采样操作。