Patent ID: 6340865
Filing Date: 2002-01-22
Classification: F16L,F24F

Abstract:
A fluorescent display device having control electrodes and anodes, each anode having an anode electrode and a fluorescent layer formed thereon, and a filament installed between the control electrodes and the anode electrodes,wherein when an anode is selected to be turned on to emit light, a first voltage is applied to the filament, a second voltage is applied to the selected anode and a third voltage is applied to a control electrode facing the selected anode, the second voltage being higher than the first voltage and the third voltage is not lower than the first voltage; and wherein when a voltage applied to a target control electrode is lower than a voltage applied to the filament by more than a predetermined voltage difference, an anode facing the target control electrode is not turned on to emit light even when the second voltage is applied thereto.