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36.1: High Efficiency Mercury‐Free Flat Light Source for LCD Backlighting
Author(s) -
Lee Ju Kwang,
Kim Tae Jun,
Jung Hae Yoon,
Whang KiWoong
Publication year - 2005
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2036245
Subject(s) - backlight , luminous efficacy , dielectric barrier discharge , electrode , materials science , plasma display , mercury (programming language) , voltage , mercury vapor lamp , optics , plasma , optoelectronics , gas filled tube , liquid crystal display , dielectric , electrical engineering , chemistry , physics , composite material , engineering , layer (electronics) , quantum mechanics , computer science , programming language
The characteristics of Mercury‐free, flat light source has been studied. An electrodeless, Dielectric Barrier Discharge (DBD) was used to generate the plasma using Ne‐Xe mixture gas of relatively low gas pressure in a 4 inch diagonal size of flat panel. Deployment of a special electrode structure resulted in discharges with high luminous efficiency with a wide driving voltage margin without contraction. When the gas and driving conditions were optimized, the luminous efficiency could be as high as more than 100 lm/W and the voltage margin a few hundred volts. The electrode structure was designed such that any hypersized flat light source can be made by a simple repeated connection of the base unit.