| 摘要 |
<p>A thermal print head printing control apparatus monitors the thermal print head temperature and the power supply voltage, looks up an optimum printing time in a time constants table corresponding to the relationship between the temperature and the voltage and printing is performed in accordance with this printing time. This arrangement prevents the printing from becoming too dark as a result of the thermal print head heating up after extended periods of continuous use, and it also stops blurring; also, when the temperature drops the print does not become lighter. Therefore, a constant print density is maintained, providing best quality printing.</p> |
