Coupling of the instability of emission intensity distributions in thin flat-type back lights

Abstract

We present spatial distributions of the emission spectra in 360 nm<λ<850 nm and the infrared light in 2 μm<λ<5 μm from the mixture of Ar, Xe and Hg atoms in thin flat-type back lights (1.74×12.4×1.6 mm 3). The spatial distributions of emission intensity from the constituents reflect the density distributions of each constituent. The intensity distribution of visible lights from mercury atoms was different from those from argon and xenon atoms. The spatial distribution of mercury atoms showed a 3×2 mode but, in the case of argon and xenon case, their intensity distributions showed a 3×(1/2) mode, in which the maximum of the intensity located near the anode. The maximum of infrared intensity located near the anode and its distribution was very similar to that of xenon atoms. The time correlation of infrared intensity strongly depended on the location in the cell. Especially, the intensity of the low frequency components below the fundamental mode of the power source became maximum near the anode. These spectroscopic features suggest the different movement of each element and the source of the infrared light near the anode is related to the excited molecules like xenon excimers.