Inkjet head and printing apparatus

Patent metadata

Field	Value
Publication number	US-2016167378-A1
Application number	US-201514966339-A
Country	US
Kind code	A1
Filing date	Dec 11, 2015
Priority date	Dec 11, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

In accordance with an embodiment, an inkjet head comprises an ejection section and a driving section. The ejection section ejects ink according to the operations of an actuator. In order to make the ejection section eject different amount of ink for different drops, the driving section applies voltage to the actuator of the ejection section such that the ejection section ejects ink continuously based on the printing data indicating the times the ejection section ejects ink and a position flag designating a drop frame number where ink starting to be ejected.

First claim

What is claimed is:

1 . An inkjet head, comprising
an ejection section configured to eject ink according to a plurality of times of operations of an actuator; and a driving section configured to apply voltages to the actuator of the ejection section such that the ejection section ejects ink continuously based on printing data indicating the times the ejection section ejects ink and a position flag designating a drop frame number where ink starting to be ejected.

2 . The inkjet head according to claim 1 , wherein
the driving section comprises a first storage section configured to store patterns of the voltages applied to the actuator; a second storage section configured to store a plurality of timer sets; a waveform generation section configured to select one of the plurality of timer sets that are stored in the second storage section and generate a waveform of a voltage applied to the actuator based on the selected timer set and the voltage pattern that is stored in the first storage section for the timing of each drop; and a voltage applying section configured to apply a voltage to the actuator based on the waveform generated by the waveform generation section.

3 . An inkjet head, comprising
an ejection section configured to eject ink according to a plurality of times of operations of an actuator; a waveform generation section configured to provide a plurality of first driving waveform for ejecting ink having first volumes identical to each other and a second driving waveform for ejecting ink having second volumes different from the first volume on each drop frame for the plurality of times of operations; a drop sequence signal indicating whether or not there is an operation of the actuator every drop frame for the plurality of times of operations; and a voltage applying section configured to apply a driving voltage corresponding to the driving waveform generated by the waveform generation section to the actuator to enable the ejection section to eject ink at a timing when the drop sequence signal indicates that there is an operation of the actuator.

4 . An inkjet head, comprising
An ejection section configured to eject ink according to operations of an actuator; a first storage section configured to store patterns of the voltages applied to the actuator; a second storage section configured to store a plurality of timer sets which are arranged in such a manner that the amounts of ink ejected by the ejection section are different from each other; a waveform generation section configured to generate waveforms of voltages applied to the actuator based on the timer sets that are stored in the second storage section and the voltage patterns that are stored in the first storage section; and a voltage applying section configured to apply voltages to the actuator based on the waveforms generated by the waveform generation section.

5 . A printing apparatus, comprising
an ejection section configured to eject ink according to a plurality of times of operations of an actuator; a driving section configured to apply voltages to the actuator of the ejection section such that the ejection section ejects ink continuously based on printing data indicating the times the ejection section ejects ink and a position flag designating a drop frame number where ink starting to be ejected; and a conveyance section configured to convey a printing medium to positions where the inkjet head ejects ink.

Assignees

• Toshiba Kk
• Toshiba Tec Kk

Inventors

• Kimura Mamoru
• Nitta Noboru
• Hiyoshi Teruyuki

Classifications

• B41J2/04588 Primary

  using a specific waveform · CPC title

• B41J2/04586

  controlling heads of a type not covered by groups B41J2/04575 - B41J2/04585, or of an undefined type · CPC title

• B41J2/04591

  Width of the driving signal being adjusted · CPC title

• B41J2/045

  by pressure, e.g. electromechanical transducers · CPC title

• B41J2/04573

  Timing; Delays · CPC title