CIRCUIT FOR GENERATING CENTER PULSE-WIDTH MODULATED WAVEFORMS AND NON-IMPACT PRINTER USING SAME

摘要

A generator circuit of a set of center pulse width modulated waveforms includes a counter (34, 70) having a time change count, and comparators (42, 44, 46, 66a, 66b, 66c) which compare the count with the respective preset counts. The preset counts are established so that the set of waveforms created is modulated in center pulse width. The waveforms are used to control the validation times of dot print elements (20, 60a, 60b, 60c), such as light emitting diodes or the like, which are part of a wireless type printhead. impact.