Thermal variable velocity printer system

摘要

A recording system for driving heating elements of a thermal printing head such that the recording intensity is substantially the same at two different recording speeds. One of at least two given recording character modes is selectively set, each of the recording character modes setting a given different recording speed. At least the pulse amplitude of a driving electric power signal, which is selectively applied to the heating elements of the thermal head, is varied in accordance with the set recording character mode while keeping the pulse cycle of the driving electric power signal at a predetermined substantially constant period. The pulse amplitude of the driving electric power signal has a higher value when recording at a higher speed and a lower value when recording at a lower speed. In addition to controlling the amplitude of the driving electric power signal, it is possible to further control the pulse widths of the pulses forming the driving electric power signal.