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Discharge Characteristics of the Cold Cathode and External Electrode Fluorescent Lamps  

Cho Guangsup (Department of Electrophysics, Department of Electronic Engineering, Kwangwoon University)
Lee Dae H. (Department of Electrophysics, Kwangwoon University)
Lee Joo Y. (Department of Electrophysics, Kwangwoon University)
Song Hyuck S. (Department of Electrophysics, Kwangwoon University)
Gill Doh H. (Department of Electrophysics, Kwangwoon University)
Koo Je H. (Department of Electrophysics, Kwangwoon University)
Choi Eun H. (Department of Electrophysics, Kwangwoon University)
Kim Sang B. (Department of Electrophysics, Department of Electronic Engineering, Kwangwoon University)
Kim Bong S. (Department of Electrophysics, Department of Electronic Engineering, Kwangwoon University)
Kang June G. (Department of Electrophysics, Department of Electronic Engineering, Kwangwoon University)
Cho Mee R. (Korea Institute of Lighting Technology)
Hwang Myung G. (Korea Institute of Lighting Technology)
Kim Young Y. (Korea Institute of Lighting Technology)
Publication Information
Journal of the Korean Vacuum Society / v.14, no.1, 2005 , pp. 49-57 More about this Journal
Abstract
The characteristics of current and voltage in a basic discharge experiment are investigated for a cold cathode fluorescent lamp with ballast capacitors attached at both ends of lamp and for a capacitive coupled external electrode fluorescent lamp. In the current-voltage characteristics for a cold cathode fluorescent lamp except ballast capacitors, it is shown that the typical glow discharge with the cathode fall follows after the dark current and Townsend firing discharge. However, in the characteristics for a cold cathode fluorescent lamp including ballast capacitors, the current increases as the voltage increases in the glow discharge region without representing a cathode fall since the most voltage is loaded at two capacitors. The characteristics for the external electrode fluorescent lamp shows the same as that of the cold cathode fluorescent lamp in the respect of glow discharge characters, and the external electrode itself roles the ballast capacitor.
Keywords
discharge; fluorescent lamps; cold cathode; external electrode; I-V characteristics;
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