| 摘要 |
PROBLEM TO BE SOLVED: To reduce the loss at AC power application and prevent the size up of the device, by connecting a series circuit composed of a first light source 1 and a storage battery in parallel through a current limiting element to the output end of a rectifier. SOLUTION: A series circuit composed of the first group of light sources 5A, a diode D1, and a storage battery 4 is connected in parallel through a resistor R1 to both ends of a rectifying circuit 2, and a contact SW 1 is connected in parallel to both ends of the series circuit consisting of the diode D1 and the storage battery 4, and the first group of light sources 5A and the anode terminal of the diode D1 are connected with each other, and the cathode terminal of the diode D1 and the storage battery 4 are connected with each other, and the cathode terminal of a diode D2 is connected to the output end of a rectifying circuit 2, and the anode terminal of the diode D2 is connected to the junction between the diode D1 and the storage battery 4. Since the first group of light sources 5A and the storage battery 4 are connected in series, the quantity of currents flowing through the resistor R1 at AC current application can be reduced, and the loss at the resistor R1 can be reduced. |
