Fundamental research on mercuryless fluorescent lamps ll - External electrode operation with pulsed dielectric barrier discharge

The,characteristics of electrodeless xenon discharge fluorescent lamps usin g dielectric barrier discharge are described in this paper. All lamps were operated with pulsed discharge. The luminance of phosphor increases as the pressure of xenon increases. As the pressure of xenon increases, the second peak of phosphor emission increases. These increases seem to be caused by the VUV light of xenon excimers. Therefore, in order to obtain high luminan ce, xenon should be filled at high pressure. In the case of the lamp operat ed by inner electrodes, if only xenon is contained in the lamp, the cathode is bombarded and is damaged by the large mass of a xenon ion. On the other hand, the external electrode type is never damaged by the ions or electron s. Moreover, the efficacy of the external electrode type is as great as the inner electrode type, and it can be improved by increasing the distance be tween electrodes.