| 摘要 |
PURPOSE: A video door phone system control device is provided to offer convenience to users and reduce the installation cost of the system by allowing voice and screen conversation with visitors through TV and replacing the screen display device and receive with television. CONSTITUTION: The device comprises a signal input measurement(508) for receiving control information of users; a key pad(204) and various switch signal input part(507); a sensor circuit part(502) for sensing the operation status of the TV(10); an operation measurement for operating the display device; a voice input measurement for transferring the voice signal of users into the control measurement; and a switching and signal transferring measurement(506) which transfers the voice or image signal of visitors and transfers to the TV(10). Accordingly the convenient video door phone system is provided to users.
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