| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress malfunction due to noise, while maintaining the operating speed. <P>SOLUTION: A direction indicator ECU 11 includes an operation storage part 113 that previously stores information of noise generating operation being an operation for specifying a period during which it is presumed that noise is generated in a series of operations for giving an instruction to a turn signal lamp driving mechanism 31; a step-up instruction part 112 that outputs first instruction information being instruction information for stepping up an operation voltage Vdd to a first voltage V1, before reaching the start time of the noise generating operation stored in the operation storage part 113, and a step-down instruction part 114 that outputs second instruction information being instruction information for stepping down the operation voltage Vdd to a second voltage V2 below the first voltage V1, after reaching the end time of the noise generating operation stored in the operation storage part 113; and a power supply control IC 11A, that switches the operation voltage Vdd between the first voltage V1 and the second voltage V2, on the basis of the first instruction information and the second instruction information. <P>COPYRIGHT: (C)2011,JPO&INPIT |
