The fabrication technology of a novel planar field emission backlight unit (FE-BLU)applied to LCD was introduced
which was different from the traditional tubular ones. The carbon nanotubes (CNTs) cathodes were prepared by screen-printing on elaborate Ag electrodes and sealed into a prototype of a 25.4 cm(10 in) FE-BLU after CNTs had been chemical modified. Then high pressure airflow with organic solvent was adopted to improve the properties of field emission. The morphology of CNT and cathodes were investigated by transmission electron microscope (TEM) and scanning electron microscope (SEM). The results showed that the field emission current density of CNT cathodes was raised evidently
and the fabricated prototype exhibited outstanding properties with high brightness of 5 860 cd/m
2
uniformity of 82% and without significant emission attenuation during 35 h .
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