Field Emission Display
Shi Yongsheng,Zhu Changchun
(School of Electronics and Information Engineering,Xi'an Jiaotong University, Xi'an 710049, China)
Abstract:Spacer density of large area carbon nanotube field emissive displays (C FED) is optimized by gradient method. The spacing between neighboring spacers in the panel, length and width of spacers are taken as design variables, while objective function is defined in terms of prescribed constraints on structural response, i.e., the stress and displacement of panel. The finite element method analysis code ANSYS is used here for structural analysis. Optimum results showed that the stress was 0.167กม107 Pa and displacement was 0.487กม10-5 m. In order to verify the simulation results, a 12.7 cm C FED sample was fabricated for experiment. The normal deflection of panel was measured and compared with the analysis results. Good agreement between the experimental and simulation results is obtained. The optimization method is compared with those of the other simulation method, and the results shows that the optimization according to the proposed method can decrease manufcturing cost about thirty percent of spacer total price. This indicates that the optimization method and procedure presented is effective and useful for designing C FED with variant sizes.
Keywords:field emission display;finite element method;optimization design;spacer