| 摘要 |
<p>PURPOSE:To obtain an excellent printing grade by performing printing while controlling a main current supply time and an auxiliary current supply time corresponding to the detection result of a temp. detection means in the specific proportional relation which corresponds to the printing mode shown by a proportional relation reference means to enable the correspondence to various printing media. CONSTITUTION:A memory means 13 storing present drive data and past drive data, a reference means 12 storing the proportional relation of the main current supply time corresponding to the present drive data and the auxiliary current supply time corresponding to the past drive data and temp. detection means 14, 15, 19 detecting the temp. of a thermal head or the circumferential temp. thereof are provided. A CPU 4 determines the sum total of current supply times corresponding to a printing mode by the temp. detection means and determines the ratio of the main current supply time and the auxiliary current supply time by the reference means 12 to calculate individual current supply times. That is, the optimum current supply condition is set to heating elements corresponding to the difference of a printing mode such as the printing to thermal paper or printing using a thermal transfer ink ribbon to achieve the enhancement of printing quality and the increase of printing speed.</p> |
