| 摘要 |
If a mobile phone is used in a place where devices demanding high precision are located such as an intensive care unit or a control tower, the electric wave from the phone exerts a bad influence on the devices and may cause malfunction. The present invention comprises a transmission device transmitting a power switching off signal for a mobile phone and installed at the entrance of a place where devices demanding high precision are located such as an intensive care unit or a research lab, and a device which is installed on the phone, receives the switching off signal and cuts off battery voltage of a mobile phone. Malfunctioning of high tech devices resulting from high frequency band wave transmitted and received by the phone can be prevented by an automatic switching off device for the phone activated when its user enters a medical clinic or a research lab. |
