| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device, illuminating equipment, and an illuminating system which can prevent unintended adjustment of the brightness of a light source or resetting of consecutive lighting times. Ž<P>SOLUTION: The lighting device includes a lighting circuit unit 10, an output control unit 11, a time-counting unit 12 which counts a lighting time of a discharge lamp La, a memory unit 13 which stores consecutive lighting times and a light control level of the discharge lamp La, a light control unit 14 which calculates a light control command value as a result of correction of light flux reduction in accordance with the light control level and consecutive lighting times stored in the memory unit 13 to output the calculated light control command value to the output control unit 11, and a power supply-detecting unit 15 which detects a supply voltage to detect an on/off state of a power supply. The light control unit 14 resets consecutive lighting times when the power supply-detecting unit 15 detects a first on/off state of the power supply, and changes a light control level to another light control level when the power supply detecting unit 15 detects a second on/off state of the power supply different from the first on/off state of the power supply. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
