共面介质阻挡放电等离子体平板光源设计与研究

Designof Flat-Panel Lamp Generated by Coplanar Dielectric Barrier Discharge Plasma

采用阳极氧化铝作为介质层,设计制作了共面介质阻挡放电等离子体平板光源,研究了高温烘焙、电源频率和气体压强等对光源着火电压和发光效率的影响。结果表明,高温烘焙电极装置和高脉冲电源频率可以使共面介质阻挡放电光源放电更稳定,放电着火电压更低;当电极宽度为0.5 mm、间距为4.5 mm、介质层厚度约为20μm、气体压强为20 Torr时,共面介质阻挡放电等离子体光源的放电稳定,亮度为7200 cd/m^(2),白光发光效率为4.92 lm/W。

A novel type of flat-panel lamp,energized by coplanar dielectric barrier discharge(DBD)plasma source with a dielectric anodic-alumina plate,was developed.The influence of the fabrication conditions,including the baking temperature,pulse frequency,gas-pressure,on the ignition voltage and luminous efficiency were studied for the design optimization.The results show that the high temperature baking and high frequency pulse had a major impact.Specifically,as the baking temperature and pulse frequency increased,the stability improved,and the ignition voltage decreased.The prototyped flat panel lamp,with an electrode width of 0.5 mm,a spacing of 4.5 mm,a dielectric layer thickness of 20μm and operating at 20 Torr,was experimentally evaluated.The self-developed flat-panel coplanar DBD plasma lamp was found to work fairly stable with a luminance of about 7200 cd/m^(2) and a white-light flux efficacy of 4.92 lm/W.