Novel Triode-Type Field Emission Arrays and Appropriate Driving Method for Flat Lamp Using Carbon Nanofibers Grown by Plasma Enhanced Chemical Vapor Deposition

摘要

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℃. A white-phosphor luminance of 10,000 cd/m~2 was obtained when the gate-voltage amplitude, gate frequency, and duration time were 230 V_(amp), 25kHz, and 2.0 μs, respectively, with an anode voltage of 10kV and an anode-cathode spacing of 10mm.