Liquid jet head and liquid jet recording device

Patent metadata

Field	Value
Publication number	US-11660860-B2
Application number	US-202117478181-A
Country	US
Kind code	B2
Filing date	Sep 17, 2021
Priority date	Sep 28, 2020
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

A liquid jet head and so on capable of reducing both of a manufacturing cost and power consumption are provided. The liquid jet head according to an embodiment of the present disclosure is provided with a jet section and at least one drive board. The drive board is provided with a first input terminal and a second input terminal, a plurality of drive devices, a plurality of transmission lines, and a plurality of terminal resistors. The drive devices each have a first input/output section and a second input/output section. The plurality of drive devices include a first drive device and a second drive device. The plurality of transmission lines include a first transmission line, a second transmission line, and at least one third transmission line. The plurality of termination resistors include a first termination resistor, a second termination resistor, and a third termination resistor.

First claim

What is claimed is:

1. A liquid jet head configured to jet liquid comprising:
a jet section configured to jet the liquid; and
at least one drive board configured to output a drive signal used to jet the liquid to the jet section, wherein
the drive board includes:
a first input terminal and a second input terminal to which transmission data transmitted from an outside of the liquid jet head is input,
a plurality of drive devices which are in a series arrangement with each other between the first input terminal and the second input terminal, and which is configured to generate the drive signal based on the transmission data input via either one of the first input terminal and the second input terminal,
a plurality of transmission lines which are disposed via the plurality of drive devices which are in the series arrangement with each other between the first input terminal and the second input terminal, and which are configured to transmit the transmission data, and
a plurality of termination resistors disposed on the plurality of transmission lines,

the drive devices each have a first input/output section and a second input/output section which are configured to input or output the transmission data,
the plurality of drive devices include:
a first drive device located at one end of the series arrangement, and
a second drive device located at another end of the series arrangement,

the plurality of transmission lines include:
a first transmission line configured to couple the first input terminal and the first input/output section in the first drive device to each other,
a second transmission line configured to couple the second input terminal and the second input/output section in the second drive device to each other, and
at least one third transmission line configured to couple the second input/output section in the first drive device and the first input/output section in the second drive device to each other, and

the plurality of termination resistors include:
a first termination resistor disposed in a vicinity of the first input/output section in the first drive device on the first transmission line,
a second termination resistor disposed in a vicinity of the second input/output section in the second drive device on the second transmission line, and
a third termination resistor disposed in a vicinity of one end or another end on each of the at least one third transmission line.

2. The liquid jet head according to claim 1 , wherein
the plurality of drive devices further include at least one third drive device located between the first drive device and the second drive device in the serial arrangement,
the plurality of third transmission lines couple the second input/output section in the first drive device and the first input/output section in the second drive device to each other via the at least one third drive device, and
the third termination resistors on each of the third transmission lines are alternately disposed in a vicinity of an end part at the first drive device side and in a vicinity of an end part at the second drive device side.

3. The liquid jet head according to claim 1 , wherein
a line length in the at least one third transmission line is set to a value smaller than ¼ of a signal wavelength obtained from a transmission frequency of the transmission data.

4. The liquid jet head according to claim 1 , wherein
at least one of the first termination resistor, the second termination resistor, and the third termination resistor is disposed inside the drive device.

5. A liquid jet recording device comprising the liquid jet head according to claim 1 .

Assignees

• Sii Printek Inc

Inventors

• Yoshida Kensuke

Classifications

• B41J2/0452

  reducing demand in current or voltage · CPC title

• B41J2/04581 Primary

  controlling heads based on piezoelectric elements · CPC title

• B41J2/04518

  reducing costs · CPC title

• B41J2/04541 Primary

  Specific driving circuit · CPC title

• B41J2002/14491

  Electrical connection · CPC title