| Plasma display panels (PDP) has high brightness, wide viewing angle, excellentcolor reproduction, and great advantage in the current commercial flat-panel display. Inorder to further reduce the power consumption of the PDP, improve energy efficiency,this dissertation proposes to use lanthanum hexaboride film which made by screenprinting method to improve the discharge efficiency of the PDP, reduce powerconsumption and reduce the cost of production.At present, the work to improve the discharge efficiency of the PDP are proceededworldwidely, such as for the conventional MgO protective layer doping, the use of newmaterials to replace MgO, most of these methods the process more complicated, orpreparedthe material is not ideal, and will change the performance of the protectivelayer of the original media. In this article, we use screen printing method to made aLaB6structure on the original MgO protective layer to form a composite layer, theproduction process is simple, low cost.The main research content and results, including:1. Combined with the the laboratory preliminary research, we analyzed thefeasibility about optimize the dielectric protective layer of the PDP with screen printingLaB6material.2. Designed and assemble the screen printing system to print LaB6film on the PDPglass substrate. Researched the LaB6slurry of the screen printing, it was found that useterpineol and diethylene glycol butyl ether as a mixed organic solvent, ethyl cellulosecontent as6wt%, the surfactant content to4wt%, is possible to print out film with densesurface and less film agglomeration.3. The transparence, conduction and growth orientation of LaB6film are detectedand analyzed. When the film was printed by paste of5wt%LaB6power contet, itobtains high transparent ratio and good insulation. When the temperature of thesintering process is500°C, enabling the film to obtain the best performance of electronemission.4. Improved sealing unit of the simulated discharge PDP production process, designed and produced the discharge test chamber which has good air tightness andstability.5. Comparative study of two different structures (single MgO protective layer,LaB6/MgO composite protective layer) of simulated discharge PDP units in the differentgas atmospheres discharge performance. The test results show that the unit with printedLaB6film reduced7%fire voltage and20%discharge delay. |
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