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Mercury Quantity in a Fluorescent Lamp for a Backlight of LCD-TVs

LCD-백라이트용 형광램프의 수은량

  • Bong, Jae-Hwan (Department of Electrophysics/LCD-BLU Laboratory, Kwangwoon University) ;
  • Kim, Yun-Jung (Department of Electrophysics/LCD-BLU Laboratory, Kwangwoon University) ;
  • Hwang, Ha-Chung (Department of Electrophysics/LCD-BLU Laboratory, Kwangwoon University) ;
  • Jin, Dong-Jun (Department of Electrophysics/LCD-BLU Laboratory, Kwangwoon University) ;
  • Jeong, Jong-Mun (Department of Electrophysics/LCD-BLU Laboratory, Kwangwoon University) ;
  • Kim, Jung-Hyun (Department of Electrophysics/LCD-BLU Laboratory, Kwangwoon University) ;
  • Koo, Je-Huan (Department of Electrophysics/LCD-BLU Laboratory, Kwangwoon University) ;
  • Cho, Guang-Sup (Department of Electrophysics/LCD-BLU Laboratory, Kwangwoon University)
  • 봉재환 (광운대학교 전자물리학과) ;
  • 김윤중 (광운대학교 전자물리학과) ;
  • 황하청 (광운대학교 전자물리학과) ;
  • 김동준 (광운대학교 전자물리학과) ;
  • 정종문 (광운대학교 전자물리학과) ;
  • 김정현 (광운대학교 전자물리학과) ;
  • 구제환 (광운대학교 전자물리학과) ;
  • 조광섭 (광운대학교 전자물리학과)
  • Published : 2008.11.30

Abstract

The amount of vapor mercury for the generation of glow discharge plasma has been calculated in a fine tube fluorescent lamp having a mixed gas of Ne+Ar including a mercury. When the ionization of atom is considered by the collision between neutral atoms (Ne, Ar, Hg) and electrons of energy $kT_e{\sim}1\;eV$, the density of vapor mercury atom has been obtained as $n(Hg){\sim}3.43{\times}10^{22}m^{-3}$ for the plasma density $n_o{\sim}10^{17}m^{-3}$. In the fluorescent lamps of out diameter 4 mm used for $32{\sim}42$-inch LCD-TVs having a mixture gas of Ne(95%)+Ar(5%) with the pressure of 50 Torr, the quantity of vapor mercury for the glow discharge has been caculated as 0.02{\sim}0.08\;mg$.

Ne+Ar의 혼합 기체와 수은이 주입된 세관 형광램프에서 플라즈마의 형성에 필요한 기체 수은의 량을 계산하였다. 전자($kT_e{\sim}1\;eV$)와 중성 원자(Ne, Ar, Hg)들과의 충돌에 의한 각 원자들의 이온화를 계산하여, 양광주 플라즈마의 밀도($n_o{\sim}10^{17}m^{-3}$)를 생성하는 조건으로부터 기체 수은 원자의 밀도 $3.43{\times}10^{22}m^{-3}$을 얻었다. $32{\sim}42$ 인치 LCD-TV용 액정표시장치에 사용되는 직경이 4 mm인 형광램프의 혼합 기체 Ne(95%)+Ar(5%) 50 Torr에 대하여, 글로우 방전에 필요한 기체 수은의 량은 $0.02{\sim}0.08\;mg$으로 계산되었다.

Keywords

References

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