Liquid ejecting head and liquid-ejecting recording apparatus

Patent metadata

Field	Value
Publication number	US-11247453-B2
Application number	US-202016801462-A
Country	US
Kind code	B2
Filing date	Feb 26, 2020
Priority date	Mar 19, 2019
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

There are provided a liquid ejecting head and a liquid-ejecting recording apparatus in which it is possible to improve convenience. According to an embodiment of the present disclosure, a liquid ejecting head includes an ejecting section including a plurality of nozzles for ejecting liquid, a driving circuit that drives the ejecting section based on a printing driving signal to eject the liquid from the nozzles, a power supply path connected to the driving circuit, a detection section that acquires measurement data based on a detection result of a current flowing on the power supply path, and an arithmetic operation section that performs both an inspection of a state of the ejecting section based on the measurement data obtained by the detection section and acquisition of a parameter for ejection of the liquid.

First claim

What is claimed is:

1. A liquid ejecting head comprising:
an ejecting section including a plurality of nozzles for ejecting liquid;
a driving circuit that drives the ejecting section based on a printing driving signal to eject the liquid from the nozzles;
a power supply path connected to the driving circuit;
a detection section that acquires measurement data based on a detection result of a current flowing on the power supply path; and
an arithmetic operation section that performs both an inspection of a state of the ejecting section and acquisition of a parameter for ejection of the liquid based on the measurement data obtained by the detection section,
wherein the arithmetic operation section performs both an inspection of a filling state of the ejecting section with the liquid, as the state of the ejecting unit, and the acquisition of the parameter relating to ejection of the liquid, based on a plurality of pieces of the measurement data obtained using a plurality of inspection driving signals having different periods each other.

2. The liquid ejecting head according to claim 1 ,
wherein the arithmetic operation section inspects the filling state with the liquid by determining whether or not each of the plurality of pieces of measurement data has a local maximum value which is equal to or more than a threshold value.

3. The liquid ejecting head according to claim 1 ,
wherein the arithmetic operation section inspects the filling state with the liquid based on a difference value between the plurality of pieces of measurement data.

4. The liquid ejecting head according to claim 1 ,
wherein the parameter is a natural vibration period (2×AP value) in the ejecting section.

5. The liquid ejecting head according to claim 1 ,
wherein the arithmetic operation section further determines whether or not a setting parameter relating to ejection of the liquid is valid, based on a comparison result between an acquisition parameter and the setting parameter, the acquisition parameter being the parameter obtained based on the measurement data, and the setting parameter being set in the liquid ejecting head.

6. The liquid ejecting head according to claim 1 ,
wherein the arithmetic operation section transmits a notification of a result obtained by inspecting the state of the ejecting section and a result obtained by performing a predetermined determination based on the parameter, to an outside.

7. A liquid-ejecting recording apparatus comprising the liquid ejecting head according to claim 1 .

Assignees

• Sii Printek Inc

Inventors

• Yoshida Kensuke
• Watanabe Toshiaki

Classifications

• B41J2002/14354

  Sensor in each pressure chamber · CPC title

• B41J2/14 Primary

  Structure thereof {only for on-demand ink jet heads} · CPC title

• B41J2/04508 Primary

  aiming at correcting other parameters · CPC title

• B41J2/0451 Primary

  for detecting failure, e.g. clogging, malfunctioning actuator · CPC title

• B41J2/04581

  controlling heads based on piezoelectric elements · CPC title