Journal of the Institute of Electronics Engineers of Korea SD (대한전자공학회논문지SD)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Luminescent Characteristics of External Electrode Fluorescent Lamp(EEFL) for LCD Backlight Applications

LCD Backlight용 외부전극 형광램프의 발광특성

  • 이순석 (충북대학교 전기전자컴퓨터공학부 및 컴퓨터정보통신연구소) ;
  • 임성규 (단국대학교 전자컴퓨터공학부)
  • Published : 2002.12.01
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Abstract

Luminescent characteristics of FLs were studied according to the structure of electrode for LCD backlight applications. The luminance and luminous efficiency of the FLs fabricated under same conditions were measured and evaluated as functions of magnitude of applied voltage and widths of external electrode. The luminance and luminous efficiency of CCFL at 12 V were 27600 cd/$m^2$ and 35.3 lm/w, respectively The luminance of EEFLS increased as the widths of external electrode increased, and the luminous efficiency of EEFLS showed to increase to 20 mm of electrode width) and to decrease at wider than 20 m of electrode widths. The luminance and luminous efficiency of EEFL with 20 mm of electrode widths were 21600 cd/$m^2$ and 26500 cd/$m^2$, 35.6 lm/w and 34.8 lm/w at 12 V, 14 V, respectively.

LCD backlight용 형광램프(fluorescent lamp, FL)의 전극구조에 따른 발광특성을 평가하였다. 동일한 조건에서 제작된 cold cathode fluorescent lamp(CCFL) 및 EEFL에 대하여 인가전압과 EEFL의 전극 폭에 따른 휘도와 발광효율을 측정, 평가하였다. 12 V에서 측정된 CCFL의 휘도와 발광효율은 각각 27600 cd/㎡ 및 35.3 lm/w를 나타내었다 EEFL의 휘도는 전극면적을 증가시킬수록 증가되었고, 발광효율은 전극 면적이 증가되면서 증가되었다가 전극 폭 20 mm에서 최대값을 나타낸 다음 다시 감소하였다. 20 mm의 전극 폭을 갖는 EEFL에 대하여 12 V와 14 V에서 측정된 휘도와 발광효율은 각각 21600 cd/㎡, 26500 cd/㎡ 및 35.6 lm/w, 34.8 lm/w였다.

Keywords

References

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