| 摘要 |
<p>PURPOSE:To heighten performance effect without giving a sense of uncomfortableness by controlling plural light sources, and increasing or decreasing the lighting number of light sources successively. CONSTITUTION:Signals 51, 52 and 53 are outputted to respective lighting circuit parts 1, 2 and 3 from a timer circuit 5 by means of a starting signal 4, and light output of a fluorescent lamp La1 of the lighting circuit part 1 is increased gradually by means of the signal 51. Next, light output of a fluorescent lamp La2 of the lighting circuit part 2 is increased gradually by means of the signal 52, and in succession, light output of a fluorescent lamp La3 of the lighting circuit part 3 is increased gradually by means of the signal 53. In this way, since the light source La3 whose total light flux is plenty is lighted in order from the light source La1 whose tube shape is small and total light flux is less, a gradually brightening fade-in condition can be provided for a lighting system, and the light sources become bright from the center to the periphery, so that performance effect can be also hightened.</p> |
