한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
권호 표지

Ultra High Luminance and Luminous Efficacy MFFL (Mercury-free Flat Fluorescent Lamp) for Scanning Backlights of LCD TVs

  • Seo, In-Woo (Plasma Laboratory, Display Technology Research Center, Dept. of Electrical Engineering and Computer Science, Seoul National University) ;
  • Jung, Jae-Chul (Plasma Laboratory, Display Technology Research Center, Dept. of Electrical Engineering and Computer Science, Seoul National University) ;
  • Oh, Byung-Joo (Plasma Laboratory, Display Technology Research Center, Dept. of Electrical Engineering and Computer Science, Seoul National University) ;
  • Whang, Ki-Woong (Plasma Laboratory, Display Technology Research Center, Dept. of Electrical Engineering and Computer Science, Seoul National University)
  • Published : 2009.10.12
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Abstract

In order to realize the high luminance and luminous efficacy MFFLs for LCD backlights, we optimized the phosphor profile to enlarge the surface area. The MFFL with the new phosphor profile shows a very wide luminance range from 2,600 to 17,000 nit with the corresponding luminous efficacy from 66 to 32.5 lm/W. The results were obtained with the color coordinate of the phosphor to be around (0.25, 0.23). And the single cell is expanded into a multi-structured configuration to realize a 32 inch-sized lamp by a simple repetition of the single cells, and a new driving scheme is proposed for an adaptive local dimming and scanning drive using dual auxiliary electrodes and bipolar drive scheme. Especially the ultra high luminance and luminous efficacy results suggest the duty time of illumination of the backlight unit can be significantly reduced.

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