Analysis of Fundamental Discharge Phenomena and its Application to Illumination under Green Environment

一般来说，荧光灯中使用汞是因为它具有很高的能效。然而，汞的使用导致灯在较低的环境温度下点火困难，并且需要较长的建立时间才能达到饱和亮度水平。该灯结构简单，放电性能稳定，具有良好的光学性能，如444 mm×27 mm的灯在整个放电区亮度均匀，亮度为11000cdm~(-2)，光通量为860lm，效率为30lmW~(-1)。虽然光通量足以满足应用要求，但其功效只有市售汞荧光灯的一半。提高无汞平板放电荧光灯的发光效率是最重要的问题。本研究的目的是了解气相动力学在这些无汞平板放电荧光灯在不同条件下运行的效果中所起的作用。为此，我们建立了Ar/Ne/Xe混合物中正柱的零维动力学模型。模型的计算结果与实验结果吻合较好，并允许我们在不同的放电条件下

Generally mercury is used in fluorescent lamps because it provides high efficacy. The use of mercury, however, leads to difficulties in lamp ignition at low ambient temperature and also a relatively long build-up time is necessary for the lamp to reach the saturated luminance level.A mercury-free flat discharge fluorescent lamp with diagonal size ranging from 0.5 to 5.2 in has been developed. The lamps have a simple structure, with stable discharge operation and good optical characteristics have been obtained For example, a luminance of 11000cd m^<-2>, a luminous flux of 860lm, and an efficacy of 30lm W^<-1> were attained with the 444mm×27mm lamp with uniform luminance throughout the discharge volume. Although the luminous flux is sufficient for the application, the efficacy is half that of commercially available mercury fluorescent lamps. An improvement of the luminous efficacy is the most important issue for the mercury-free flat discharge fluorescent lamp. The goal of the present study is to understand the role of the gas phase kinetics in the efficacy of these mercury-free flat discharge fluorescent lamps operating under different conditions. To this end, we developed a zero-dimensional kinetic model of the positive column in Ar/Ne/Xe mixtures. Results from the model compare reasonably well with experiment and allow us to under various discharge conditions