| 摘要 |
<p>A lighting device of discharge tube comprising a first inverter, a second inverter outputting a voltage of opposite phase to that of the first inverter, a discharge tube connected between one output terminal of the first inverter and one output terminal of the second inverter, a first current detection circuit provided between the other output terminal of the first inverter and a common potential and connected with first and second current detection elements in series, a second current detection circuit provided between the other output terminal of the second inverter and the common potential and connected with third and fourth current detection elements in series, and a protective circuit for stopping operation of the first and second inverters by detecting current abnormality based on a signal combining the outputs from the second and fourth current detection elements together.</p> |
