| 摘要 |
PURPOSE:To make the character density of a document uniformly visible as a whole by a reader, by mounting a density data memory means for storing density data at every character pattern and correcting a pulse width corresponding to the black dot arrangement state of a character pattern at every character along with the correction of the pulse width due to a head current supply history. CONSTITUTION:Density correction data is a character font data memory 6 and, in addition to the correction of a dot (pulse width) due to the current supply history stored in a dot correction table 14, the density correction corresponding to each character pattern is further performed. That is, at the time of the printing of the n-th figure, the current supply pulse width from the first dot to the 24-th dot stored in the dot correction table 14 is corrected on the basis of the flag data (density correction data) of the n-th figure of a printing buffer 12. A pulse width correction table 15 is used in the correction of this current supply pulse width and a current is supplied to each of pins of 24 dots by the pulse width converted according to the table 15. |
