Applied Science and Convergence Technology 2002; 11(1): 76-80
Published online April 1, 2002
Copyright © The Korean Vacuum Society.
Tae S. Cho,Young M. Kim,Nam O. Kyun,Sung J. Kim,June G. Kang,Eun H. Choi,Guangsup Cho
Characteristic properties of fluorescent lamps operated by capacitively-coupled external electrodes have been investigated. External electrode fluorescent lamps(EEFLs) are typically operated at low currents less than 10 ㎃, and high voltages of about 1.5 ㎸. Luminance of up to 20,000 cd/㎡ with efficiency of above 40 ㏐/W is achieved in EEFLs driven by square pulses of the frequency lower than 100 ㎑. It is also found that the brightness and efficiency of external electrode fluorescent lamps depend on the electrode length whose optimum length is about 3 cm.