Patent ID: 6208365
Filing Date: 2001-03-27
Classification: B41J

Abstract:
A vacuum fluorescent printer for forming an image based on image data on a photosensitive material, comprising:a print head movable in a sub-scanning direction relative to said photosensitive material, and including:a luminous block having a plurality of luminous elements arranged in a main scanning direction for irradiating said photosensitive material with light released from phosphorous objects to which electrons are applied based on a drive signal, thereby forming dots on said photosensitive material; anda printer controller for generating a pulsed drive signal as said drive signal, said pulsed drive signal having a pulse width corresponding to a time period of irradiation of the light;wherein the number of pulses in said drive signal is determined based on a density value of the image data, andthe pulse width of said pulsed drive signal is variable such that the pulse width becomes larger according as the moving speed of said print head in said sub-scanning direction relative to said photosensitive material becomes slower.