Patent ID: 8723757

Claim:
A vacuum fluorescent display driving apparatus comprising: a control driver to apply a driving voltage simultaneously to a plurality of grid electrodes of a vacuum fluorescent display through a power line; and a selecting section; wherein the control driver includes a grid driver limiting section to perform a limitation on the number of the grid electrodes to which the driving voltage is applied simultaneously to less than a predetermined first threshold value, the predetermined first threshold value is based on a value of a permissible current of the power line for the driving voltage; the control driver to further apply the driving voltage simultaneously to a plurality of anode electrodes of the vacuum fluorescent display through the power line, the control driver includes an anode driver limiting section to perform a limitation on the number of the anode electrodes to which the driving voltage is applied simultaneously to less than a predetermined second threshold value, wherein the predetermined second threshold value is based on the value of the permissible current of the power line for the driving voltage; and the selecting section is adapted to control the grid driver limiting section to perform a limitation on the number of the grid electrodes to which the driving voltage is applied simultaneously to less than the predetermined first threshold value, and the selecting section is further adapted to control the anode driver limiting section to perform a limitation on the number of the anode electrodes to which the driving voltage is applied simultaneously to less than the predetermined second threshold value, and the selecting section is further adapted to control a limitation on the sum of the number of the grid electrodes and the number of the anode electrodes to which the driving voltage is applied simultaneously to less than a predetermined third threshold value, wherein the predetermined third threshold value is based on the value of the permissible current of the power line for the driving voltage.