DRIVE DEVICE AND DRIVE METHOD FOR VACUUM FLUORESCENT DISPLAY

摘要

Provided are a drive device and drive method for a vacuum fluorescent display that can suppress brightness variations in display images and improve display quality. A drive device for a vacuum fluorescent display is provided with a positive electrode unit in which a plurality of positive electrodes to which a phosphor is applied are disposed in a matrix shape and a negative electrode filament that discharges electrons toward the positive electrode unit. The device is provided with: a first magnetic field generating means that generates a first magnetic field perpendicular to the direction in which the positive electrode unit and the negative electrode filament face each other and that can periodically switch polarity; and a second magnetic field generating means that generates a second magnetic field that is perpendicular to the direction in which the positive electrode unit and the negative electrode filament face each other and crosses the first magnetic field and that can periodically switch polarity.

主权项

1. A driving device for a vacuum fluorescent display which includes
an anode unit constituted by a plurality of fluorescent substance-coated anodes arranged in a matrix pattern, and a cathode filament that emits electrons toward the anode unit, the device comprising: a first magnetic field generating means configured to generate a first magnetic field vertical to a direction in which the anode unit and the cathode filament face each other, and of which polarity is switchable periodically; and a second magnetic field generating means configured to generate a second magnetic field vertical to a direction in which the anode unit and the cathode filament face each other and crossing the first magnetic field, and of which polarity is switchable periodically.