Druckgerät mit einer Schaltung zur Verbesserung der Druckqualität

摘要

Bit data of the received video signal is partially converted into a first signal representing a data sequence corresponding to a resolution of an LED head (19 in FIG. 1). The first signal is transmitted to the LED head in the form of a real printing data signal to be printed on a basic raster line in synchronism with a line timing signal. The remaining bit data of the received video signal, which are not converted into the first signal, are converted into a second signal representing of another data sequence, and then stored in a line buffer (55 in FIG. 7). The second signal stored in the line buffer is in turn transmitted to the LED head in the form of a real printing data signal to be printed on the additional raster line in synchronism with an additional line timing signal. LED head drive energy with which the the basic raster lines are printed and another LED head drive energy with which the additional raster lines are printed are set independently of each other. The LED head may be provided with such a resolution function.