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- In this paper, we presents the characteristics of the new electrode structure in an AC Plasma Display Panel(PDP) that can generate dual mode discharges with a combination of short-gap and long-gap discharges. The experiment results show that the discharge voltage of the new electrode structure is mainly determined by short-gap discharge and the luminous efficiency is improved by 20% compared with the conventional electrode structure. The improvement of luminous efficiency is mainly caused by higher VUV generation and broader distribution from the ICCD camera measurements.