| 摘要 |
<p>PURPOSE:To provide a driving circuit of a thermal recording head which can achieve miniaturization of the driving circuit and contrive high speed recording operation without occupying a data bus of a CPU on account of output of meaningless recording data. CONSTITUTION:Strobe signals strob1, 2 are alternately switched each fetch of one block content recording data data. Then, by switching a selection signal sel each fetch of two block content recording data data, shift registers 13a, 13c and shift registers 13b, 13d are taken respectively as one set, and fetch of one block content recording data data and a blank data and their hold and output are repeated each set of the shift registers 13. Thereby, four block content recording data data are printed without having any latch circuit.</p> |
