高周波専用蛍光ランプの電極スポット位置の推定法

概要

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It is very useful when judging lifetime of a lamp to know the position of the spot on the electrode filament. This is because the lamp's life depends mostly on the emitter volume which decreases as the operating time increases, and the remaining emitter volume is closed to the emission point. We describe an easy method for finding the emission point. This research was conducted from two viewpoints, experimentation and simulation. We observed the emission point and measured the lamp's electrical characteristics, which are the voltage across the filament and the currents flowing into and out of the filament. We then estimated the emission position using the electrical characteristics measured as a simulation. Our observation results showed that the position of the spot can be confirmed during the cathode cycle but not during the anode cycle. Our calculations showed that the spot position moves as the lighting time increases in the cathode cycle, but that it does not move during the anode cycle. There is no discrepancy between our observation results and our calculation results.
社団法人照明学会の論文
2008-05-01