Ambient light illuminated liquid crystal display system
    2.
    发明授权
    Ambient light illuminated liquid crystal display system 失效
    环境光照液晶显示系统

    公开(公告)号:US4997263A

    公开(公告)日:1991-03-05

    申请号:US364750

    申请日:1989-06-12

    IPC分类号: G02B27/00 G02B27/01

    摘要: A liquid crystal display system utilizes an optical arrangement which is aligned so that ambient light from the direction of an obersver's view is channeled behind the liquid crystal display to provide back illumination therefor. An illuminator is arranged to provide supplementary illumination for the liquid crystal display as may be required. A photodetector determines when ambient light is inadequate for required display brightness and operates through appropriate control circuitry to turn the illuminator on or off as the case may be and to control the contrast of the liquid crystal display.

    摘要翻译: 液晶显示系统利用光学布置,其被对准,使得来自观察者方向的环境光被引导到液晶显示器后面,以提供背光照明。 照明器被布置成为可能需要的液晶显示器提供辅助照明。 光电探测器确定何时环境光不足以满足所需的显示亮度,并通过合适的控制电路操作,以根据情况打开或关闭照明器,并控制液晶显示器的对比度。