| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a solar power generation LED lighting device for lighting by utilizing power generated by a solar battery with high efficiency, even when the output voltage of the solar battery is equal to or less than the rated voltage, or even when the output voltage of the battery is too high than the LED threshold. <P>SOLUTION: This solar power generation LED lighting device is provided with: a solar battery 11; a battery 12; LED 13; a first DC voltage converter 14 for boosting a first DC voltage V1 generated by the solar battery 11 to a second DC voltage V2 which is equal to or more than the rated voltage of the battery 12, and for outputting it to the battery 12; and a second DC voltage converter 15 for converting a third DC voltage V3 output from the battery 12 into a fourth DC voltage V4 so that the light emitting efficiency of the LED 13 can be turned into a highly efficient state, based on a current voltage running through the LED 13 and for outputting it to the LED 13. <P>COPYRIGHT: (C)2009,JPO&INPIT |
