VFD
VFD Overview
VFD (Vacuum Fluorescent Display)
Vacuum fluorescent displays (VFDs) display data by creating thermal electrons from voltage supplied to the filament (hot cathode). If accelerated electrons from a grid encased in glass under a high vacuum condition reach the anodes (phosphors), they emit light and illuminate the patterned display.
※ Illuminates when positive (+) voltage is supplied to the anode (+); does not illuminate when negative (-) voltage is supplied.
The vacuum fluorescent display (VFD) was first developed in 1967 and was initially used in electronic calculators. Color VFDs were co-developed by a phosphor maker in the 1980’s. VFDs now offer multi-color, excellent visual recognition by means of a clear display with high brightness (a self-luminous device), less eye fatigue as compared to LEDs (soft light), wide viewing angle, low operating voltage with low power consumption, and an easy assembly of parts. They offer a very high reliability and are widely used.
General VFD (Vacuum Fluorescent Display)
