Ink jet printing apparatus and ink jet printing method

Details Ink jet printing apparatus and ink jet printing method Ink jet printing apparatus and ink jet printing method

2007-05-25

2010-12-28

Nguyen, Thinh H (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S017000, C347S019000

Reexamination Certificate

active

07857409

ABSTRACT:
An ink jet printing apparatus is provided that can realize a stable ejection volume with the minimum change in a voltage value supplied in a scanning. To realize this, when a detected temperature of a print head is included in a first range, a pulse width control is performed while a voltage being fixed to a first voltage. When a detected temperature is included in a second range, a pulse width control is performed while a voltage being fixed to a second voltage. In the pulse width control based on the two voltages, a temperature partially overlapped region is provided between the first range and the second range. By this, even when a print head has an increased temperature during a print scanning, an ejection volume can be controlled, in the print scanning, while minimizing the switching of a driving voltage.

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