Abstract: A liquid discharge apparatus is provided with a cavity which is configured to be filled with an ink, an ink supply path configured to supply the ink to the cavity, a nozzle linked with the cavity and configured to discharge the ink which is filled into the cavity, and a detecting section configured to detect the state of the ink supply path which is supplied based on the amount of the ink which is filled into a plurality of the nozzles.

Abstract: An ink jet printer is provided with discharge heads configured to discharge ink which is filled into a cavity from a nozzle which is linked with a cavity due to the capacity of the cavity changing according to vibrating of a vibration plate which is vibrated by a piezoelectric element, a head driver configured to drive the piezoelectric element, and a detecting section configured to detect the state of the discharge heads. The detecting section is configured to detect the state of the discharge heads within a specific period of time after driving of the piezoelectric element is stopped.

Abstract: A liquid discharge device includes a head having a piezoelectric element that vibrates a vibrating plate, a pressure chamber for which the internal pressure is increased and decreased by vibration of the vibrating plate, and a nozzle in communication with the pressure chamber, that can discharge a liquid by increasing and decreasing the pressure of the pressure chamber, a drive unit that outputs drive signals to the piezoelectric element, a testing unit that tests discharge abnormality of the nozzle based on a vibration pattern of residual vibration inside the pressure chamber that occurs due to the drive signals, and a control unit that has the drive unit output a second drive signal after having it output a first drive signal, and that has the testing unit detect the discharge abnormality of the nozzle after the second drive signal is output.

Abstract: It is possible to generate an ejection driving pulse which ejects ink, and a plurality of minute vibration driving pulses which cause a pressure fluctuation in ink in a pressurizing chamber to an extent of not causing the ink to be ejected; the ejection driving pulse includes a first expansion element which causes the pressurizing chamber to be expanded by being changed from a reference potential to a first potential which is lower than the reference potential, and a first contraction element which causes the pressurizing chamber to be contracted by being changed from the first potential to the reference potential; and the minute vibration driving pulse includes a second contraction element which causes the pressurizing chamber to be contracted by being changed from a second potential which is lower than the reference potential to a third potential which is higher than the second potential and the first potential, and is lower than the reference potential, and a second expansion element which causes the press

Abstract: A liquid discharge apparatus includes: a head having a piezoelectric element that vibrates a diaphragm, a pressure chamber where an interior pressure is increased or decreased by vibration of the diaphragm, and a nozzle communicating with the pressure chamber to discharge a liquid inside the pressure chamber according to increasing and decreasing of the interior pressure; a drive unit that outputs a drive signal which becomes a first potential during a first period, becomes a second potential during a second period following the first period, and becomes a third potential, which is a potential between the first potential and the second potential, during a third period following the second period; a detection unit that detects a residual vibration inside the pressure chamber; and a control unit capable of modifying the potential of the third potential within a range between the first potential and the second potential.

Abstract: A liquid discharge apparatus includes: a head having a piezoelectric element that vibrates a diaphragm, a pressure chamber where an interior pressure is increased or decreased by vibration of the diaphragm, and a nozzle communicating with the pressure chamber to discharge a liquid inside the pressure chamber according to increasing and decreasing of the interior pressure; a drive unit that outputs a drive signal which becomes a first potential during a first period, becomes a second potential during a second period following the first period, and becomes a third potential, which is a potential between the first potential and the second potential, during a third period following the second period; a detection unit that detects a residual vibration inside the pressure chamber; and a control unit capable of modifying the potential of the third potential within a range between the first potential and the second potential.

Abstract: A liquid discharge device includes a head having a piezoelectric element that vibrates a vibrating plate, a pressure chamber for which the internal pressure is increased and decreased by vibration of the vibrating plate, and a nozzle in communication with the pressure chamber, that can discharge a liquid by increasing and decreasing the pressure of the pressure chamber, a drive unit that outputs drive signals to the piezoelectric element, a testing unit that tests discharge abnormality of the nozzle based on a vibration pattern of residual vibration inside the pressure chamber that occurs due to the drive signals, and a control unit that has the drive unit output a second drive signal after having it output a first drive signal, and that has the testing unit detect the discharge abnormality of the nozzle after the second drive signal is output.

Abstract: An ink jet printer is provided with discharge heads configured to discharge ink which is filled into a cavity from a nozzle which is linked with a cavity due to the capacity of the cavity changing according to vibrating of a vibration plate which is vibrated by a piezoelectric element, a head driver configured to drive the piezoelectric element, and a detecting section configured to detect the state of the discharge heads. The detecting section is configured to detect the state of the discharge heads within a specific period of time after driving of the piezoelectric element is stopped.

Abstract: There is provided a line printer including: a nozzle that discharges liquid; a pressure chamber that communicates with the nozzle; a piezoelectric element that is provided to correspond to the pressure chamber and to discharge liquid; a pulse generation unit that generates a drive pulse to discharge liquid from the nozzle and an inspection pulse to inspect a liquid discharge state; and a residual vibration detection unit that detects residual vibration in the pressure chamber, which occurs after the inspection pulse is applied to the piezoelectric element. The drive pulse is caused to be applied to the piezoelectric element and the inspection pulse is caused not to be applied to the piezoelectric element at a first printing speed. The drive pulse and the inspection pulse are caused to be applied to the piezoelectric element at a second printing speed. The second printing speed is slower than the first printing speed.

Abstract: A liquid discharge apparatus is provided with a cavity which is configured to be filled with an ink, an ink supply path configured to supply the ink to the cavity, a nozzle linked with the cavity and configured to discharge the ink which is filled into the cavity, and a detecting section configured to detect the state of the ink supply path which is supplied based on the amount of the ink which is filled into a plurality of the nozzles.

Abstract: It is possible to generate an ejection driving pulse which ejects ink, and a plurality of minute vibration driving pulses which cause a pressure fluctuation in ink in a pressurizing chamber to an extent of not causing the ink to be ejected; the ejection driving pulse includes a first expansion element which causes the pressurizing chamber to be expanded by being changed from a reference potential to a first potential which is lower than the reference potential, and a first contraction element which causes the pressurizing chamber to be contracted by being changed from the first potential to the reference potential; and the minute vibration driving pulse includes a second contraction element which causes the pressurizing chamber to be contracted by being changed from a second potential which is lower than the reference potential to a third potential which is higher than the second potential and the first potential, and is lower than the reference potential, and a second expansion element which causes the press

Abstract: A liquid discharging apparatus including: a nozzle which discharges a liquid; a pressure chamber which communicates with the nozzle; a piezoelectric element which is provided in order to discharge the liquid corresponding to the pressure chamber; a driving signal generation unit which generates a driving signal in order to drive the piezoelectric element; and a residual vibration detection unit which detects a residual vibration. The driving signal generation unit generates a driving signal for inspection which is a first electric potential during a first period, is a second electric potential during a second period, is a third electric potential during a third period, is shifted from the first electric potential to the second electric potential, and is shifted from the second electric potential to the third electric potential. The third electric potential is an electric potential between the first electric potential and the second electric potential.

Abstract: A liquid ejecting apparatus includes a piezoelectric element, a nozzle that ejects a liquid in association with the driving of the piezoelectric element, a driving signal generation unit that generates a driving signal for driving a plurality of the piezoelectric elements, and a residual vibration detection unit that detects residual vibration generated by the driving of the piezoelectric element. The driving signal includes an ejection pulse for ejecting a liquid, a first vibration damping pulse that suppresses residual vibration generated by the ejection pulse, a second vibration damping pulse which is a pulse different from the first vibration damping pulse and suppresses residual vibration generated by the ejection pulse, and an inspection pulse for detecting the residual vibration signal.

Abstract: A liquid ejecting apparatus includes a first piezoelectric element, a first nozzle that ejects a liquid in association with the driving of the first piezoelectric element, a second piezoelectric element, a second nozzle that ejects a liquid in association with the driving of the second piezoelectric element, a driving signal generation unit that generates a driving signal for driving a plurality of piezoelectric elements, and a residual vibration detection unit that detects residual vibration generated by the driving of the piezoelectric element. The first nozzle is adjacent to the second nozzle.

Abstract: There is provided a line printer including: a nozzle that discharges liquid; a pressure chamber that communicates with the nozzle; a piezoelectric element that is provided to correspond to the pressure chamber and to discharge liquid; a pulse generation unit that generates a drive pulse to discharge liquid from the nozzle and an inspection pulse to inspect a liquid discharge state; and a residual vibration detection unit that detects residual vibration in the pressure chamber, which occurs after the inspection pulse is applied to the piezoelectric element. The drive pulse is caused to be applied to the piezoelectric element and the inspection pulse is caused not to be applied to the piezoelectric element at a first printing speed. The drive pulse and the inspection pulse are caused to be applied to the piezoelectric element at a second printing speed. The second printing speed is slower than the first printing speed.

Abstract: A liquid discharging apparatus including: a nozzle which discharges a liquid; a pressure chamber which communicates with the nozzle; a piezoelectric element which is provided in order to discharge the liquid corresponding to the pressure chamber; a driving signal generation unit which generates a driving signal in order to drive the piezoelectric element; and a residual vibration detection unit which detects a residual vibration. The driving signal generation unit generates a driving signal for inspection which is a first electric potential during a first period, is a second electric potential during a second period, is a third electric potential during a third period, is shifted from the first electric potential to the second electric potential, and is shifted from the second electric potential to the third electric potential. The third electric potential is an electric potential between the first electric potential and the second electric potential.

Abstract: A liquid discharge apparatus which causes a liquid to be discharged through a first nozzle by applying a driving signal to a first driving element, and causes a liquid to be discharged through a second nozzle by applying the driving signal to a second driving element, and which, with respect to the first nozzle, determines on the basis of an image formed by causing the liquid to be discharged through the first nozzle whether or not the first nozzle causes a liquid discharge failure, and, with respect to the second nozzle, determines on the basis of a detection signal which is obtained by applying the driving signal to the second driving element whether or not the second nozzle corresponding to the second driving element causes a liquid discharge failure.

Abstract: A liquid ejecting apparatus includes a first piezoelectric element, a first nozzle that ejects a liquid in association with the driving of the first piezoelectric element, a second piezoelectric element, a second nozzle that ejects a liquid in association with the driving of the second piezoelectric element, a driving signal generation unit that generates a driving signal for driving a plurality of piezoelectric elements, and a residual vibration detection unit that detects residual vibration generated by the driving of the piezoelectric element. The first nozzle is adjacent to the second nozzle.

Abstract: A liquid ejecting apparatus includes a piezoelectric element, a nozzle that ejects a liquid in association with the driving of the piezoelectric element, a driving signal generation unit that generates a driving signal for driving a plurality of the piezoelectric elements, and a residual vibration detection unit that detects residual vibration generated by the driving of the piezoelectric element. The driving signal includes an ejection pulse for ejecting a liquid, a first vibration damping pulse that suppresses residual vibration generated by the ejection pulse, a second vibration damping pulse which is a pulse different from the first vibration damping pulse and suppresses residual vibration generated by the ejection pulse, and an inspection pulse for detecting the residual vibration signal.

Abstract: A liquid discharge apparatus which causes a liquid to be discharged through a first nozzle by applying a driving signal to a first driving element, and causes a liquid to be discharged through a second nozzle by applying the driving signal to a second driving element, and which, with respect to the first nozzle, determines on the basis of an image formed by causing the liquid to be discharged through the first nozzle whether or not the first nozzle causes a liquid discharge failure, and, with respect to the second nozzle, determines on the basis of a detection signal which is obtained by applying the driving signal to the second driving element whether or not the second nozzle corresponding to the second driving element causes a liquid discharge failure.