| 摘要 |
PURPOSE:To provide always reduced light with uniform brightness by supplying power voltage as it is to an indicating lamp when a lighting switch is turned off and supplying constant voltage of constant voltage circuit lower than the power voltage when said switch is turned on. CONSTITUTION:Since a lighting switch 2 is turned off in the day time, a relay 10 is turned off to close a normally closed contact 10b so that indicating lamps 14a-14d are lit with brightness determined by power voltage by the output of a sensor or switch corresponding to respective detected conditions. On the other hand, since head-lights or the like are lit in the night time, the lighting switch 2 is turned on to close a normally opened contact 10a of the relay 10 and supply from a constant voltage circuit 12 constant voltage lower than power voltage, for example, 8.5V to indicating lamps 14a-14d for having the brightness. Also, even if a plurality of lamps in the indicating lamps 14a-14d are lit simultaneously, since constant voltage is supplied by the constant voltage circuit 12, the light reduced to the constant brightness is always provided. |
