VACUUM FLUORESCENT INDICATOR Russian patent published in 1999 - IPC

FIELD: text and graphic information display engineering. SUBSTANCE: indicator has transparent vacuum envelope housing phosphor-covered anodes with external leads, control grids orthogonal to anodes and provided with external leads, and cathodes parallel to control electrodes; odd- and even-numbered additional electrodes are newly introduced between cathodes and control grids in parallel with cathodes whose quantity is reduced. EFFECT: reduced power dissipated by cathode heater and improved quality of information display due to more uniform glow of phosphor. 2 cl, 3 dwg