| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low-cost LED lighting circuit that prevents breakage of an LED due to overcurrent. <P>SOLUTION: A control circuit 17, when the lighting state is changed from a high-beam state in which both a first light source block 14 and a second light source block 15 are turned on to a low-beam state in which only the first light source block 14 is turned on, starts a second short circuit 18 and short-circuits the LED 16 of the second light source block 15, and starts the first short circuit 19 in addition to the second short circuit 18, and short-circuits the LED 16 of the second light source block 15 after a first predetermined time t1 passes. <P>COPYRIGHT: (C)2013,JPO&INPIT |
