| 摘要 |
PROBLEM TO BE SOLVED: To provide a sunlight natural lighting device making good use of clean energy and to lower manufactures' costs, setting costs, and maintenance costs. SOLUTION: This sunlight natural lighting device 10 is composed of a natural lighting part getting the sunlight, a driving device 76 driving the natural lighting part, a microcomputer 24 controlling the driving device 76 to place the natural lighting part in its correct position according to the position of the sun, a solar battery 86 supplying the driving device 76 with electric power, a wind-power generating device 20 supplying the driving device 76 with electric power, and a charging device 22 charging surplus power of the solar battery 86 or the wind-power generating device 20. The electric power of the wind-power generating device 20 and the surplus power of the solar battery 86 are stored in the charging device 22, which enables flexibly coping with change in the weather condition and lightens the burden for the solar battery 86, to lower costs of the sunlight natural lighting device 10.
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