A new Areal Selective Dimming Method of Mercury-free Flat Fluorescent Lamps for LCD Backlighting

  • Jung, Jae-Chul (Plasma Lab. School of Electrical Engineering, Seoul National University) ;
  • Seo, In-Woo (Plasma Lab. School of Electrical Engineering, Seoul National University) ;
  • Oh, Byung-Joo (Plasma Lab. School of Electrical Engineering, Seoul National University) ;
  • Kim, Hyuck (Plasma Lab. School of Electrical Engineering, Seoul National University) ;
  • Whang, Ki-Woong (Plasma Lab. School of Electrical Engineering, Seoul National University)
  • Published : 2008.10.13

Abstract

A new mercury-free flat fluorescent lamp with a single cell having dimension 2.2inches across the diagonal, had been developed which shows a wide, stable operating voltage margin, high luminance and luminous efficacy by adopting the bipolar pulse drive scheme. In this paper, the single cell is expanded into a multi-structured configuration to realize a 32inch sized panel across the diagonal by a simple repetition of the single cells. A driving scheme is proposed for a 2-bit areal selective dimming using dual auxiliary electrodes and bipolar drive scheme.

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