Slide 1

Plasma backlight generates light using pulsed dielectric barrier discharge Applied voltage excites xenon atoms in the gas chamber and enables the formation of excited Xe 2 * molecules UV-radiation is transformed into visible light by phosphors Principle of the barrier discharge Source: OSRAM Plasma backlight module structure Source: OSRAM Xenon reaction diagram Source: POSTECH Plasma Backlight Unit Simulation Slide 2 Applied Voltage Slide 3 Figures show the potential and related electric field in different phase of pulses. While pulse voltage is beginning to apply, which induce the strong electric field at cathodes, charged densities would be increased by secondary electron. At tip edges, where has the higher electric field, will try to collect ions during the switch of voltage. Electrical fieldPotential Potential & Electric Field Slide 4 The density distribution widens to roughly triangular shapes ending on the opposing electrode lines. Simulated dominant UV radiation is 173nm, which is consistent with experimental observation. Xe 2 * ( 3 u + )--173nm Xe 2 * (O u + )--150nmXe 2 * ( 1 u + )--173nm Electron n excited Distribution