A new ac plasma display panel (PDP) for high luminous efficacy is proposed, and its characteristics are investigated. The new ac PDP has a coplanar gap of 200 µm and an auxiliary electrode located between the scan and common electrodes. The periodic pulses are applied to the auxiliary electrode during the sustain period, which plays the roles of enhancing the infrared emission and reducing the discharge current. The sustain voltage decreases with the increase of the auxiliary pulse voltage until 80 V. When the voltage of the pulse applied to the auxiliary electrode is 50 V, the luminous efficacy reaches its peak value and is approximately 8.7 lm/W obtained from the measurement of Ne + 20% Xe gas-mixture discharges in the green cells. The luminous efficacy of the new proposed test ac PDP with Ne + 13% Xe and Ne + 20% Xe gas mixtures is improved by 190% and 320%, respectively, compared to that of the conventional ac PDP with a Ne + 13% Xe gas mixture. Index Terms-Auxiliary electrode, high efficacy, long coplanar gap, plasma display panel (PDP).
A new driving waveform was proposed to stabilize the reset and address discharges in the high efficacy AC PDP with coplanar‐gap of 200 μm and auxiliary electrode. The erase pulse was applied to the auxiliary electrode after sustain period. The reset discharges were induced between scan and auxiliary electrode. During ramp‐down period, a positive bias was applied to auxiliary and common electrode. The reset discharge of the coplanar‐gap of 200 μm was stabilized. The address discharge time lag of the AC PDP with coplanar‐gap of 200 μm was improved using the new driving waveforms. Also, it was found that the minimum address voltage could be reduced when the new driving waveforms were applied to the high efficacy PDP with auxiliary electrode.
Strong dielectric barrier discharge are formed in micro-gap, which the reduce field is 2400Td (1Td=l0~"Vcm2), the average electron energy is tlOeV, and electron density is >lOIS/cm'. Plasma radiation speciality is one of important parameter to indicate the plasma state and performance, which is studied to the micro-gap DBD at high pressure using CCD image method. With the optimization of discharge parameters, the self-organized effect of DBD plasma is controlled in this paper. The results are as following.
Alternating current plasma display panels (AC PDPs) are one of the most promising technologies for large-area flat panel displays. Many research and development activities have been carried out to improve display performances of AC PDPs such as luminance and luminous efficiency, resolution, lifetime and contrast ratio. However, their low efficiency is still an important drawback of PDPs.For high efficiency PDPs, many studies have been done to optimize geometrical parameters of a PDP cell, which is one of the main factors that determine luminous efficiency. Focusing our attention on the front dielectric layer, we have performed two-dimensional simulations of a coplanar structured AC-PDP cell. An AC PDP structure with a grooved front dielectric layer, which has a thinner front dielectric layer near the gap between two sustain electrodes than the other part of the front dielectric, has already been studied'.Here, we have extended our manipulation of front dielectric to make multi-layered structures, in search of a high efficiency PDP with low operating voltage2.In a two-layered front dielectric structure, we have found that the order of stacked dielectric layers with different dielectric constants influences discharge characteristics. According to our simulation results, the component dielectric layer with higher dielectric constant should be next to sustain electrodes to get higher efficiency and lower breakdown voltage. These results are very promising because we can not only reduce the breakdown voltage but also enhance the luminous efficiency of PDPs, by using an appropriate multilayered front dielectric structure. In addition, these multilayered dielectric structures can give more freedom to choose dielectric materials for the front dielectric layer of PDPs, considering the contact between the front dielectric layer and the sustain electrodes and the interaction between them.1. S. J. Yoon et al.,
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