| 摘要 |
<p>PURPOSE: To facilitate installation as well as to make less expensive for a lamp system for a vehicle by incorporating a power supply circuit which makes constant voltages from a power voltage supplied from a battery, a holding circuit which holds a switch mode can be switched according to a switch operation, and a relay drive circuit which drives relays according to the switch mode. CONSTITUTION: By incorporating a power supply circuit 6-1, a holding circuit 6-2, and a relay drive circuit 6-3 into an operating switch unit 6, waterproof structures for these parts are not required and the system can be made at low a cost. A relay unit is eliminated and waterproof coupler relays 5-1, 5-2 are used so that the system can also be easily installed. The system can also be made more inexpensive as well as eliminating a Zener diode and reducing the number of parts because the constant voltage (7V) in the power supply circuit 6-1 is generated by using the voltage drop in the LED.DL1-DL4, for display.</p> |
