| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lighting apparatus that can firmly sense a man, who stops in one position or moves to another position, to obtain stable light output and save energy. SOLUTION: The lighting apparatus comprises a power source 21, a light load 6, a man sensor 1, an amplifying part 2, a comparison circuit part 3a for comparing amplified value of the amplifying part 2 and a first reference value V1 and outputting, calculating part 7, a comparison circuit part 3b for comparing amplified vale of the calculating of the calculating part 7 and a second reference value V2 (<V1) and outputting, and lighting controller 5 for controlling a light output of the light load 6. In the case the light load 6 is turned off, the comparison circuit part 3a is operated, and if the amplified value of the amplifying part 2 is more than the first reference value V1, the load 6 is turned on. If the light load 6 is turned on, the comparison circuit part 3b is operated. If the integration value of the man sensor 1 is more than the first reference value V2, the light load 6 is turned on.</p> |
