| 摘要 |
<p>PROBLEM TO BE SOLVED: To make appropriate illumination in response to moving speed of a movable body.SOLUTION: In an illumination system, when a vehicle 3 runs in a low speed (lower than 20 km/h), only three of lightings 1 belonging to a group No. 1 turn on a light source 10 into full-lighting, and when the vehicle 3 runs in a high speed (20 km/h or higher), six lightings 1 belonging to each group No. 1 and 2 turn on the light source 10 into full-lighting. Thus, the faster vehicle 3 runs, the wider range the lightings light, so that a driver can drive in a safe illumination environment. According to a patent literature 1, a control signal needs to be sent six times separately in order to turn on six lightings 1. Contrary to the above, according to the present embodiment, the control signal sent twice can turn on the six lightings 1. That makes the lightings 1 hardly be delayed and thus appropriate illumination in response to moving speed of the movable body (speed of the vehicle 3).</p> |
