| 摘要 |
PROBLEM TO BE SOLVED: To provide an illumination protective circuit which appropriately protects a circuit in accordance with a situation of opening and closing of an illumination load and suppresses high heat generated by voltage drop by a resistor.SOLUTION: A protective circuit applied to an illumination device which has a high frequency transformer having a primary coil and a secondary coil, and a bridge driver unit includes: a common grounding unit configured by connecting the primary coil and the secondary coil of the high frequency transformer with a ground end of the bridge driver unit; a rectifier unit which is a half-wave rectifier unit or a full-wave rectifier unit for supplying a current by connecting to the common grounding unit; and an illumination load to which a high-frequency current of the secondary coil of the high frequency transformer is input by connecting to the half-wave rectifier unit or the full-wave rectifier unit. |
