| 摘要 |
<p>PURPOSE:To improve a resolving power by a method wherein a shift scanning cycle of shift registers based on a clock is determined by a shortest printing cycle allowing the response of a dot printing element and the number of a plurality of cascade-connected shift registers, and an output signal of an OR gate is supplied to a shift register of a thermal printing head. CONSTITUTION:For example, where n=2, t=T/3, in a shortest printing cycle T, with respect to a dot printing signal D0 of a real time obtained by sampling an input waveform A, two interpolating dot printing signals D01, D02 are generated with a delay in order by the amount of a shift scanning cycle (t) by being shifted by interpolating cascade-connection shift registers. Therefore, at the time of printing on a dot printing signal D0, during a shift scanning cycle (t) a dot printing signal D-11 pregenerated one shift scanning cycle before and a dot printing signal D-22 pregenerated two shift scanning cycles before are loaded by a shift register of a thermal printing head through an OR gate. Immediately after that, data for one line is simultaneously printed by dot printing elements. In this manner, printing is conducted with high resolving power.</p> |
