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[International Journal] Effect of helium addition on discharge characteristics in a flat fluorescent lamp
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S.E.Lee , H.N.Lee , H.B.Park , K.S.Lee , K.C.Choi
JOURNAL OF APPLIED PHYSICS, November , 2005
vol 98, no 9, pp 093306
The discharge characteristics of a multielectrode dual coplanar in a mercury-free flat fluorescent lamp were investigated using brightness-efficiency measurement and the infrared (IR) spectrum and intensified charge coupled device (ICCD) characteristics. The level of brightness was above 14 900 cd/m2 under the conditions of neon-–50% xenon–8% He gas composition, 150 Torr pressure, and 20 kHz alternating current pulse. The ICCD results revealed a faster and wider discharge with a Ne–50% Xe–8% He gas composition. The effect of adding helium (He) to Ne–50% Xe revealed a faster peak emission, as confirmed by ICCD images. From the gated IR emission spectrum, the intensity ratio of I823 nm/I828 nm was ∼ 8% higher with Ne–50% Xe–8% He than with Ne–50% Xe under the same pressure and applied voltage conditions.