Infra Red Emission Characteristics in AC Plasma Display Panel with Coplanar Long-Gap

Abstract

Summary form only given. The conventional AC plasma display panels (PDPs) with 50~80 mum coplanar-gap using Ne+Xe (4~6%) gas-mixtures have an inefficient discharge structure. Therefore, the luminous efficiency of AC PDPs is not good as much as that of other display devices. In a point of view from discharges, the improvement of the luminous efficiency of AC PDP is related to how to make more excited particles which generate ultraviolet (UV) photons. For improving electron excitation rate, there are some promising approaches such as high Xe content and long-gap discharge mode. However, the luminous efficiency does not increase linearly with increase of coplanar-gap because the micro-plasma is restricted by the barrier rib. In this work, infrared (IR) emission characteristics of the discharge in AC PDP with various coplanar-gaps are observed using intensified charge coupled devices (ICCD) camera. Usually, IR emits during the transition from 2P5 and 2P6 in 6p to 3P1 and 3P2 in 2s of Xe monomer. From the measurement of IR emission, the quantity of UV emission can be investigated indirectly. From the results, IR emission intensity has its maximum value when the coplanar gap is 200 mum. IR emission intensity of 300 mum coplanar-gap discharge is lower than that of 200 mum. Here, the height of barrier rib in AC PDP is 150 mum. The shape of discharge volume becomes narrower like filament when the coplanar-gap is 300 mum. It is found that 200 mum is the optimal value of the coplanar-gap in AC PDP when the height of barrier rib is fixed at 150 mum.