A printing apparatus includes a head including a plurality of nozzles configured to discharge liquid to a medium, an abnormal nozzle detection unit configured to detect an abnormal nozzle having a discharging defect among the plurality of nozzles, a contact detection unit configured to detect contact between the head and the medium, a suction unit configured to perform an ejection operation of ejecting the liquid from the plurality of nozzles, and a control unit. The control unit executes a suction operation when the abnormal nozzle is detected and the contact between the head and the medium is detected, and the control unit executes a printing of complementing the abnormal nozzle when the abnormal nozzle is detected and the contact between the head and the medium is not detected.

A liquid discharge apparatus includes: a first discharge section that has a first piezoelectric element and discharges liquid by driving the first piezoelectric element with a driving signal; a driving signal generation section that generates the driving signal; a first selection section that performs a selection operation of selecting whether or not to apply each voltage of a plurality of driving waveforms included in the driving signal to the first piezoelectric element, based on a print data signal; a residual vibration detection section that detects residual vibration of the first discharge section after a voltage of a first driving waveform among the plurality of driving waveforms is applied to the first piezoelectric element; and a control section that generates the print data signal, in which the control section stops the driving signal generation section when causing the residual vibration detection section to detect the residual vibration.

A print head that includes a drive element to be driven when a drive signal is supplied to the drive element and that ejects liquid by the driving of the drive element includes an ejecting module including the drive element and a nozzle from which the liquid is ejected, and a current detecting circuit that detects a drive current generated due to propagation of the drive signal. The current detecting circuit includes a current detector that detects the drive current as a current detection signal, and a processor that controls an operation of the current detecting circuit according to the current detection signal.

A recording device includes a recording head in which a plurality of nozzle rows are arranged in a predetermined direction that include a first nozzle row including a plurality of nozzles for ejecting ink having a predetermined color, and a second nozzle row including a plurality of nozzles for ejecting ink having an identical color to the predetermined color, and a control unit configured to control ejection of ink by the nozzle, wherein the control unit, when a test pattern for an inspection of a missing dot due to an ejecting defect of the nozzle is recorded on a recording medium, records a dot pattern, that is an individual element that forms the test pattern, so that ink ejected from a nozzle of the first nozzle row, and ink ejected from a nozzle of the second nozzle row overlap.

An inkjet image forming apparatus includes a transferer and a hardware processor. The transferer transfers, onto a recording medium, ink that is ejected from an inkjet head and is borne on a transfer member. The hardware processor performs control for reducing transferability of the ink in a case where the ink borne on the transfer member is not-to-be-transferred ink, compared with a case where the ink is to-be-transferred ink.

A liquid ejecting apparatus includes a first pressure chamber communicating with a first nozzle configured to eject a liquid, a second pressure chamber adjacent to the first pressure chamber and communicating with a second nozzle configured to eject the liquid, and a first driving element corresponding to the first pressure chamber. The liquid ejecting apparatus executes a detection operation of detecting a fluctuation in the pressure of the liquid within the second pressure chamber that occurred when the first driving element was driven to cause the pressure of the liquid within the first pressure chamber to fluctuate.

Although a conventional method of inspecting an ink discharge state in which the temperature change of the heater is detected enables accurate and high-speed inspection, due to the situation in which the inspection was performed, appropriate post-processing depending on the situation cannot be executed based on a result of the inspection. Therefore, it is necessary to determine the ink discharge state in detail. A plurality of modes are provided in accordance with the purpose of performing an inspection of the ink discharge state, and a discharge inspection threshold is provided for each of these modes. By selectively executing or continuously executing these modes, it is possible to determine the ink discharge state in more detail.

A test image printer of an inkjet printer causes a test image, including a mark with a predefined shape and usable to correct an image captured by an image capturing device, and a test pattern usable to inspect a plurality of nozzles, to be printed on a recording medium. An image capture controller controls the image capturing device to capture an image of the test image printed on the recording medium. A corrector compares the image of the mark captured by the image capturing device, to the predefined shape of the mark, to calculate a correction value, and corrects the image of the test pattern, captured by the image capturing device, based on the calculated correction value. An inspector inspects the plurality of nozzles based on the image of the test pattern corrected by the corrector.

A liquid ejection apparatus includes an ejection head including a drive element driven by a drive signal and ejecting a liquid by driving the drive element, an ejection control circuit including a drive circuit that outputs the drive signal based on a base drive signal including a plurality of pieces of drive data, a main control circuit that outputs an ejection control signal including the base drive signal to the ejection control circuit, and a cable that communicably couples the ejection control circuit and the main control circuit and through which the ejection control signal propagates, wherein the ejection control signal includes the base drive signal and a determination signal corresponding to the base drive signal.

A liquid ejecting apparatus includes a driven element that is driven by a drive signal; an ejection head that ejects a liquid when the driven element is driven; a drive circuit that outputs the drive signal, the drive circuit including an amplifier circuit that includes a first transistor and amplifies, based on an amplification voltage and through an operation of the first transistor, a base drive signal based on which the drive signal is generated; and a leakage current detection circuit that detects a leakage current in the drive circuit. The leakage current detection circuit is electrically connected to the first transistor included in the amplifier circuit to which the amplification voltage is supplied.