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Applied Science and Convergence Technology 2002; 11(1): 76-80

Published online April 1, 2002

Copyright © The Korean Vacuum Society.

Characteristics of Luminance and Efficiency for External Electrode Fluorescent Lamps Driven by Square Pulses

Tae S. Cho,Young M. Kim,Nam O. Kyun,Sung J. Kim,June G. Kang,Eun H. Choi,Guangsup Cho

Abstract

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.

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