In order to determine the relationship between luminance characteristics (filament emission current

current distributive coefficient

luminous efficiency and luminance) and anode voltage for Vacuum Fluorescent Display(VFD)

shorten developing time and improve successful rate of new product development

eight types of VFD produced by fluorescent phosphors of eight colors were used as test samples

and the filament emission current

the anode voltage and the luminance were measured under each step of anode voltage. The calculating formula between the luminance and the anode voltage for VFD was achieved by applying least square method (LSM) to fitting the relationship between the filament emission current and the anode voltage

and right approximation method to calculate Weibull fitting formulae of the current distributive coefficient and the luminous efficiency. The research results demonstrate that test design scheme is correct and feasible

that the fitting formulae of the filament emission current

the current distributive coefficient and the luminous efficiency have very high accuracy

and that the calculated luminance has less error than the experimental one. It would not only determine luminance characteristics based on the designed value of anode voltage at the beginning of VFD design very conveniently

but also provide significant theoretical foundation and technical guidance for VFD structural optimization design.