Abstract
We investigated new triode-type field emission arrays (FEAs) and an appropriate driving method in a lower plane (cathode plate) for a flat lamp applicable to backlight units (BLUs) in liquid crystal display (LCD). The proposed triode-type FEAs were designed with a gate and cathode on the same lower plane without distinction, and a `swap-gate driving' method was applied to obtain field emission uniformity and a longer emitter lifetime. A 3-in.-diagonal flat lamp for a LCD BLU was fabricated using carbon nanofibers grown by plasma-enhanced chemical vapor deposition at approximately 480 °C. A white-phosphor luminance of 10,000 cd/m2 was obtained when the gate-voltage amplitude, gate frequency, and duration time were 230 Vamp, 25 kHz, and 2.0 µs, respectively, with an anode voltage of 10 kV and an anode-cathode spacing of 10 mm.
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