| 摘要 |
PROBLEM TO BE SOLVED: To simply notify a vehicle driver of various situations in a tunnel and on a road by a lighting method in advance.SOLUTION: A lighting system having light-emitting diodes of three colors, white, yellow and red as a light source is used, and the light-emitting diodes of these three colors are selectively combined to generate a bright and dark state in white, a blinking state in yellow, and a blinking state in red. The vehicle driver is alerted by the former two states, and is warned by the latter state. In the bright and dark state in white, the white light emitting diode repeats blinking and dimming at a prescribed duty ratio and with a prescribed frequency within a light flux ratio range of 1.0:0.4-1.0:0.6. In the blinking state in yellow, the light flux ratio of white and yellow light emitting diodes is set within a range of 1.0:0.7-1.0:1.0, and the yellow light emitting diode repeats lighting and light-out at a prescribed duty ratio and with a prescribed frequency. In the blinking state in red, the light flux ratio of the white and red light emitting diodes is set within a range of 1.0:0.3-1.0:0.5, and the red light emitting diode repeats lighting and light-out at a prescribed duty ratio and with a prescribed frequency. |
