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    Over-door interphone system provided with a night-vision monitoring device
    2.
    发明授权
    Over-door interphone system provided with a night-vision monitoring device 失效
    提供夜视对讲系统的夜视监控设备

    公开(公告)号：US4843461A

    公开(公告)日：1989-06-27

    申请号：US26368

    申请日：1987-02-06

    申请人： Yoshikazu Tatsumi ,  Tsuyoshi Hisano

    发明人： Yoshikazu Tatsumi ,  Tsuyoshi Hisano

    IPC分类号： H04N7/18

    CPC分类号： H04N7/186

    摘要： An over-door interphone system for telephonic communication between a master station unit inside of a house and a remote station unit outside of an entrance door of the house is provided with a night-vision monitoring device. The night-vision monitoring device has a television camera comprising a solid-state camera sensitive to an infrared light. The solid-state camera is responsible for successfully incorporating the television camera within a less bulky housing of the remote station unit as well as for monitoring the image of a visitor by the camera without being noticed. Also, there can be utilized an illumination device producing an infrared which is hardly perceived by the visitor, ensuring monitoring of the visitor at night without a giving unfavorable impression thereto. The illumination device may be driven to operate for a predetermined period of time starting from the actuation of a calling switch, or a communication interval from the actuation of the calling switch to the hangup of a handset on the master station unit. The illumination device may be also driven in response to the actuation of an illumination operating switch or to a low illuminance level of the object. Thus, the illumination device can be operated with a minimum power requirement. The illumination device is controlled to operate in synchronous with the video signal from the television camera, providing an effective monitoring illumination free from flicker.

    摘要翻译： PCT No.PCT / JP86 / 00323 Sec。 371日期1987年2月6日 102（e）日期1987年2月6日PCT申请1986年6月25日PCT公布。 公开号WO87 / 00384 日期为1987年1月15日。在房屋内的主站单元和房屋入口外的远程站单元之间的用于电话通信的室外对讲机系统设置有夜视监视设备。 夜视监视装置具有包括对红外光敏感的固态照相机的电视摄像机。 固态摄像机负责将电视摄像机成功地并入远程站单元的体积较小的外壳中，以及用于通过相机监视访问者的图像而不被注意。 此外，可以使用产生红外线的照明装置，其几乎不被访客感知，确保在夜间对访客进行监视而不给予不利的印象。 可以驱动照明装置在从主动开关的启动开始的预定时间段或者从主动开关的致动到主站单元上的手机挂断的通信间隔中操作。 照明装置也可以响应于照明操作开关的致动或对象的低照度水平而被驱动。 因此，可以以最小功率需求来操作照明装置。 照明装置被控制以与来自电视摄像机的视频信号同步操作，从而提供无闪烁的有效监视照明。