| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method of preventing an erroneous operation at a lamp light control and a circuit for the same capable of easily preventing the erroneous operation caused by a voltage drop generated when controlling the light of an LED lamp. <P>SOLUTION: When a prescribed voltage drop is detected by a detection circuit part 7, an output from an output transformer T1 is stopped or lowered by controlling an operation state of a switching element Q1 by controlling an output for a wire winding part operation by a control circuit part 8, so that an LED lamp 5 can be turned off when the voltage is dropped below the prescribed voltage by a light control. Accordingly, the erroneous operation like a flicker of lightness caused by a voltage drop at light control can be prevented easily, safely, and promptly. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
