| 摘要 |
<p>An automatic lighting device of a cut off switch control bar and a control method thereof are provided to improve efficiency of an operation by automatically being turned on by an electric field generated in a high voltage wire. An automatic lighting device of a cut off switch control bar includes a power maintenance part(50), an electric field detection part(10), an oscillation part(20), and a light emitting part(40). If a push button switch is turned on, the power maintenance part maintains a power supply of each unit of a lighting device. If an electric field is detected from a high voltage wire or a cut off switch, the electric field detection part outputs an electric field detection signal. The oscillation part outputs a pulse group by synthesizing a signal having a first frequency and the electric field detection signal. LED devices(D4,D5,D6,D7) of the light emitting part are lighted according to a signal by the pulse group outputted from the oscillation part.</p> |
