Liquid ejecting apparatus, print head, and liquid ejecting method

A liquid ejecting apparatus comprising:

• a drive signal generation circuit generating a drive waveform signal;
• a liquid ejecting head including a vibration plate, a drive element displacing the vibration plate by being supplied with the drive waveform signal, a cavity that is filled with a liquid and of which an internal pressure changes by the displacement of the vibration plate, and a nozzle that communicates with the cavity and that ejects the liquid by the change in internal pressure of the cavity;
• and
• an ejecting malfunction detection circuit that detects, as a residual vibration signal, a change of the vibration plate caused based on a change in pressure of the cavity after the supply of the drive waveform signal to the drive element and that detects presence or absence of an ejecting malfunction of the nozzle and specifies a cause of the ejecting malfunction based on the residual vibration signal, wherein
• the ejecting malfunction detection circuit includes
• a detection unit detecting the residual vibration signal,
• a storage unit storing a learning model obtained by machine learning a relationship between the residual vibration signal and an ejecting state of the liquid ejected from the nozzle, and
• a determination unit determining the presence or absence of the ejecting malfunction of the liquid ejecting head based on the residual vibration signal and the learning model.

A print head comprising:

• a liquid ejecting head including a vibration plate, a drive element displacing the vibration plate by being supplied with a drive waveform signal, a cavity that is filled with a liquid and of which an internal pressure changes by the displacement of the vibration plate, and a nozzle that communicates with the cavity and that ejects the liquid by the change in internal pressure of the cavity;
• and
• an ejecting malfunction detection circuit that detects, as a residual vibration signal, a change of the vibration plate caused based on a change in pressure of the cavity after the supply of the drive waveform signal to the drive element and that detects presence or absence of an ejecting malfunction of the nozzle and specifies a cause of the ejecting malfunction based on the residual vibration signal, wherein
• the ejecting malfunction detection circuit includes
• a detection unit detecting the residual vibration signal,
• an obtaining unit obtaining information indicating an ejecting state of the liquid ejected from the nozzle, and
• a learning unit machine learning a relationship between the residual vibration signal and the ejecting state.

A print head comprising:

• a liquid ejecting head including a vibration plate, a drive element displacing the vibration plate by being supplied with a drive waveform signal, a cavity that is filled with a liquid and of which an internal pressure changes by the displacement of the vibration plate, and a nozzle that communicates with the cavity and that ejects the liquid by the change in internal pressure of the cavity;
• and
• an ejecting malfunction detection circuit that detects, as a residual vibration signal, a change of the vibration plate caused based on a change in pressure of the cavity after the supply of the drive waveform signal to the drive element and that detects presence or absence of an ejecting malfunction of the nozzle and specifies a cause of the ejecting malfunction based on the residual vibration signal, wherein
• the ejecting malfunction detection circuit includes
• a detection unit detecting the residual vibration signal,
• a storage unit storing a learning model obtained by machine learning a relationship between the residual vibration signal and an ejecting state of the liquid ejected from the nozzle, and
• a determination unit determining the presence or absence of the ejecting malfunction of the liquid ejecting head based on the residual vibration signal and the learning model.

A liquid ejecting method of a liquid ejecting apparatus including a drive signal generation circuit generating a drive waveform signal, a liquid ejecting head including a vibration plate, a drive element displacing the vibration plate by being supplied with the drive waveform signal, a cavity that is filled with a liquid and of which an internal pressure changes by the displacement of the vibration plate, and a nozzle that communicates with the cavity and that ejects the liquid by the change in internal pressure of the cavity, and an ejecting malfunction detection circuit that detects, as a residual vibration signal, a change of the vibration plate caused based on a change in pressure of the cavity after the supply of the drive waveform signal to the drive element and that detects presence or absence of an ejecting malfunction of the nozzle and specifies a cause of the ejecting malfunction based on the residual vibration signal, the method comprising:

• by the ejecting malfunction detection circuit,
• detecting the residual vibration signal;
• obtaining information indicating an ejecting state of the liquid ejected from the nozzle;
• and
• machine learning a relationship between the residual vibration signal and the ejecting state.

A liquid ejecting method of a liquid ejecting apparatus including a drive signal generation circuit generating a drive waveform signal, a liquid ejecting head including a vibration plate, a drive element displacing the vibration plate by being supplied with the drive waveform signal, a cavity that is filled with a liquid and of which an internal pressure changes by the displacement of the vibration plate, and a nozzle that communicates with the cavity and that ejects the liquid by the change in internal pressure of the cavity, and an ejecting malfunction detection circuit that detects, as a residual vibration signal, a change of the vibration plate caused based on a change in pressure of the cavity after the supply of the drive waveform signal to the drive element and that detects presence or absence of an ejecting malfunction of the nozzle and specifies a cause of the ejecting malfunction based on the residual vibration signal, the method comprising:

• by the ejecting malfunction detection circuit,
• detecting the residual vibration signal;
• storing a learning model obtained by machine learning a relationship between the residual vibration signal and an ejecting state of the liquid ejected from the nozzle;
• and
• determining the presence or absence of the ejecting malfunction of the liquid ejecting head based on the residual vibration signal and the learning model.