Method and apparatus for providing LCD panel protection in an LCD display controller
    1.
    发明授权
    Method and apparatus for providing LCD panel protection in an LCD display controller 失效
    在LCD显示控制器中提供LCD面板保护的方法和装置

    公开(公告)号:US06310599B1

    公开(公告)日:2001-10-30

    申请号:US08704842

    申请日:1996-08-28

    IPC分类号: G09G333

    摘要: A flat panel display controller is provided with a circuit for monitoring clocking signal(s) to the flat panel display. A clocking signal output to the flat panel display may be fed back to the display controller using a conventional I/O pad. In the preferred embodiment, the fed back clocking signal resets a counter. In a second embodiment, the fed back clocking signal may then pass through an edge detector whose output then resets the counter. The counter will overflow if a edge signal is not received within a predetermined time period. If an overflow occurs, the carry signal of the counter will initiate a flat panel power shutdown through power control circuitry. The clock signal for the counter may be derived from an off-chip oscillator such that if a failure occurs within the display controller, the counter will continue to function.

    摘要翻译: 平板显示控制器设置有用于监视平板显示器的时钟信号的电路。 输出到平板显示器的定时信号可以使用传统的I / O垫反馈到显示控制器。 在优选实施例中,反馈时钟信号复位计数器。 在第二实施例中,反馈时钟信号然后可以通过边沿检测器,其输出然后复位该计数器。 如果在预定时间段内没有接收到边缘信号,计数器将溢出。 如果发生溢出,计数器的进位信号将通过电源控制电路启动平板电源关闭。 计数器的时钟信号可以从片外振荡器导出,使得如果在显示控制器内发生故障,则计数器将继续工作。