Improvements of the luminous efficiency of mercury-free fluorescent lamps via structural and complex gas mixture changes

  • Oh, Byung-Joo (Plasma Laboratory, school of Electrical Engineering #053 Seoul National University) ;
  • Jung, Jae-Chul (Plasma Laboratory, school of Electrical Engineering #053 Seoul National University) ;
  • Seo, In-Woo (Plasma Laboratory, school of Electrical Engineering #053 Seoul National University) ;
  • Kim, Hyuk (Plasma Laboratory, school of Electrical Engineering #053 Seoul National University) ;
  • Whang, Ki-Woong (Plasma Laboratory, school of Electrical Engineering #053 Seoul National University)
  • Published : 2008.10.13

Abstract

Structural parameter variation effects (changing the coplanar gap under different discharge dimensions) and use of complex gas mixtures (He, Ne, Ar and Xe) in mercury-free fluorescent lamps are studied in this paper. Pure Neon gas is the best buffer gas for obtaining high luminous efficiency in mercury-free fluorescent lamps. It is shown that with a shorter coplanar gap (30mm), a high luminous efficiency can be obtained at low operating voltage, as well as high luminance uniformity and stable discharge with a Ne-Xe 20% gas mixture.

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