| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a video doorphone system capable of informing people in a room about whether or not a person exists at a front door independently of whether or not the person makes a call operation and alerting the people in the room when the person is a suspicious-looking person. <P>SOLUTION: In the case that a human body sensor 10 of a camera attached entrance slave unit 1 consecutively and reactively senses a human body existing in the vicinity of the camera attached entrance slave unit 1 for a time preset by a timer circuit 26 of an in-room master unit 2 or over, a resident in the room can confirm that the human body existing in the vicinity of the camera attached entrance slave unit 1 is a suspicious-looking person by means of at least one notice means such as blinking of a human body sensor reactive display section 21 of the in-room master unit and alerting of a warning tone from a notice section 22 of the in-room master unit. <P>COPYRIGHT: (C)2003,JPO</p> |
