| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve an evaluation device for the voltage applied to a control input terminal and transmitted from a transformer. SOLUTION: In this lighting device, the evaluation device 16 has a sample- and-hold circuit 22. The lighting device is provided with means 19, 21, 24 matching a frequency of a sequence signal of the sample hold circuit 22 and a frequency of the temperorally periodically changing voltage to generate a temporally constant phase difference (time difference) between the sequence signal of the sample-and-hold circuit 22 and the temporally periodically changing voltage, for the purpose of elimination of the spike in the voltage transmitted by the transformer 15.</p> |
