Drive device, drive board, liquid jet head, and liquid jet recording device

Patent metadata

Field	Value
Publication number	US-12508806-B2
Application number	US-202318386523-A
Country	US
Kind code	B2
Filing date	Nov 2, 2023
Priority date	Nov 29, 2022
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

There are provided a drive device and so on capable of improving the reliability. A drive device according to an embodiment of the present disclosure is a drive device configured to generate a drive signal to be applied to a liquid jet head having a plurality of nozzles, the drive device including a plurality of drive terminals which is arranged along a longitudinal direction of the drive device, and which is configured to individually output the drive signal for jetting liquid from the nozzles, and at least one dummy terminal configured to electrically be coupled to a predetermined constant potential. The plurality of drive terminals is divided into a plurality of drive terminal groups arranged along the longitudinal direction, and the dummy terminal is arranged at at least one of intervals between the plurality of drive terminal groups.

First claim

What is claimed is:

1 . A drive board comprising at least one drive device configured to generate a drive signal to be applied to a liquid jet head having a plurality of nozzles, the drive device comprising:
a plurality of drive terminals which is arranged along a longitudinal direction of the drive device, and which is configured to individually output the drive signal for jetting liquid from the nozzles; and at least one dummy terminal configured to electrically be coupled to a predetermined constant potential, wherein the plurality of drive terminals is divided into a plurality of drive terminal groups arranged along the longitudinal direction, and the dummy terminal is arranged at at least one of intervals between the plurality of drive terminal groups, wherein the drive device is mounted on a board surface in the drive device, wherein the drive device has a constant-potential terminal, and the drive board further comprises: a plurality of drive signal wiring lines electrically coupled individually to the plurality of drive terminals, a dummy terminal coupling wiring line electrically coupled to the dummy terminal; and a constant-potential wiring line which is electrically coupled to the constant-potential terminal, and to which the constant potential is applied, wherein the dummy terminal coupling wiring line and the constant-potential wiring line are electrically coupled to each other, and further wherein the drive board further comprises: a first wiring layer and a second wiring layer opposed to each other along a direction perpendicular to the board surface, wherein the drive device and the plurality of drive signal wiring lines are each arranged in the first wiring layer, and the constant-potential wiring line includes a first constant-potential wiring line arranged in the first wiring layer, and a second constant-potential wiring line which is arranged in the second wiring layer, and which is electrically coupled to the first constant-potential wiring line via a first through hole.

2 . The drive board according to claim 1 , further comprising a return wiring line which is arranged in the second wiring layer, and which is electrically coupled to a common electrode in the liquid jet head, wherein
the return wiring line is
electrically coupled to the second constant-potential wiring line, and
electrically coupled to the dummy terminal coupling wiring line via a second through hole.

3 . The drive board according to claim 1 , wherein
the second constant-potential wiring line includes a plurality of types of wiring lines to which the constant potentials different from each other are respectively applied, and the plurality of types of wiring lines is different in wiring line width from each other.

4 . The drive board according to claim 3 , wherein
the plurality of types of wiring lines includes a ground wiring line to which a ground potential as the constant-potential is applied, and the wiring line width of the ground wiring line is largest of the wiring line widths of the plurality of types of wiring lines.

5 . The drive board according to claim 1 , wherein
the plurality of drive devices is cascaded to each other via the first constant-potential wiring line in the first wiring layer, and the second constant-potential wiring line is arranged in an area corresponding to an interval between a plurality of the drive devices in the second wiring layer.

6 . The drive board according to claim 1 , wherein
a circuit component is mounted on the second constant-potential wiring line.

7 . A liquid jet head comprising:
the drive board according to claim 1 ; and a jet section which is configured to jet the liquid based on the drive signal output from the drive board, and which has the plurality of nozzles.

8 . A liquid jet recording device comprising the liquid jet head according to claim 7 .

Assignees

• Sii Printek Inc

Inventors

• Yoshida Kensuke
• Watanabe Toshiaki

Classifications

• B41J2002/14491

  Electrical connection · CPC title

• B41J2/14201 Primary

  Structure of print heads with piezoelectric elements · CPC title

• B41J2/04541 Primary

  Specific driving circuit · CPC title

• B41J2/01 Primary

  Ink jet · CPC title