| 摘要 |
PURPOSE:To enable printing density to become constant and uniform, by changing the amplitude of a pulse applied to a resistor element by storing correction data corresponding to the resistance value of the resistor element. CONSTITUTION:A non-volatile ROM is used as a thermal resistance value variation correcting part 18 and the irregularity value of the resistance value of a thermal head 7 can be read therein and the writing of data can be performed from an operation part 2 while a line density correcting part 19 has function for correcting the amplitude of an applied pulse. When a receiving control part 12 receives receiving data, the data of a table 13 is read to correct the amplitude of the applied pulse while the correction of the amplitude of the applied pulse corresponding to the variation in the resistance value of the head 7 is performed on the basis of the data 18 of the correcting part 19 and the correction of the adapted pulse is further performed by the correcting part 19. A control part 12 applies the pulse subjected correction to the head 7 and, at the same time, performs the rotary control of a pulse motor 14. |
