外部電極併用による複数電極無水銀蛍光ランプの高輝度・高効率化

概要

論文の詳細を見る
The fluorescent lamps are widely used for general lighting in Japan because of their high efficacy, long life, high general color rendering index and so forth. Mercury which is used in fluoresent lamps for general lighting has a possibility to cause environmental problems. So we have been developing fluorecent lamps which contain only rare gases in place of mercury. The rare gas lamps are environmentally-friendly, but it has lower luminous flux than the mercury lamp has. Therefore, we have tried improving luminous flux of the rare gas lamp by expanding positive column. By setting an external electrode on the outside wall of lamp which has multi-pairs of electrodes, positive column expands and luminous flux increases. Luminous flux changes by setting position and width of an external electrode. Then luminous efficiency achieves 5lm/W. We obtain relatively larger luminous flux when setting an external electrode near the cathode comparing with the lamp without external electrode. Luminous flux also changes by changing a way of setting an external electrode. We have achieved largest luminous flux when spiral external electrode is wound on the lamp.
社団法人電気学会の論文
2005-05-01