VFDs are composed of a hot cathode filament, anode segments coated with phosphor and grids within a vacuum sealed glass encasement. The filament is made up of alkaline coated tungsten wires which enable the display to emit light.
VFDs are composed of a hot cathode filament, anode segments coated with phosphor and grids within a vacuum sealed glass encasement. The filament is made up of alkaline coated tungsten wires which enable the display to emit light.