| 摘要 |
PURPOSE:To reduce cost of an interphone provided with video by making one video camera commonly available by a plurality of slave sets. CONSTITUTION:When a slave interphone whose call button is depressed is judged the first interphone 12a, it is considered that there is no change in attitude angle, and a video camera driving means is driven holding an attitude angle as it is and picks up a visitor standing outside the wall in the neighborhood of the first slave interphone. That is, the video camera maintains its attitude angle so that the axis of the lens of a video camera 15 matches with the light axis of lens 61, introduced the image of the visitor in the neighborhood of the first interphone slave set onto the video camera 15 to form the image thereon, and displays the image on a television receiver 14 attached to an indoor master interphone 13. Thus, since one video camera is used commonly for a plurality of slave sets, the entire television equipped interphone system becomes simple in structure and low cost. |
