A printer includes a board configured to control a printing unit operating in the printer that performs printing on a medium, and a heat sink including a counter surface that is provided to face a board surface of the board and that has a shape with a length in a first direction X longer than a length in a second direction Y intersecting the first direction X in a plan view, and configured to receive heat generated in the board with the counter surface and dissipate the heat to the outside. The counter surface includes a slit penetrating the counter surface and extending in the second direction Y.

There are provided a control device and so on capable of achieving an increase in reliability. The control device according to an embodiment of the present disclosure is a control device to be applied to a liquid jet head having a jet section configured to jet liquid, the control device including a determination section configured to determine whether to output a drive signal based on waveform configuration information supplied from an outside of the liquid jet head to the jet section from a drive device configured to generate the drive signal based on the waveform configuration information.

An inkjet printer that includes an inkjet head in which a plurality of ink flow paths are formed is provided. In this inkjet printer, a plurality of nozzles from which ink is ejected and a plurality of ink flow paths to which the plurality of nozzles 0 are connected are formed in an inkjet head. The inkjet head includes a plurality of ejection energy generation elements that make the plurality of respective nozzles eject ink. Based on an ink flow rate which is a flow rate of ink flowing into each of the plurality of ink flow paths and internal temperature or external temperature of the inkjet head, a controller of the inkjet printer estimates the ink temperature in each of the plurality of ink flow paths, and controls drive voltage applied to the plurality of ejection energy generation elements based on the result of the estimation.

Provided is a liquid ejection device capable of improving the sealing property of a gap between a main housing and a liquid ejection head while maintaining a position adjustment allowance of the liquid ejection head with respect to the main housing. A main housing has one or more ejection unit protrusion opening into which the liquid ejection unit is inserted downward and protrudes through a gap in a horizontal direction, and covers and internally houses a portion of the liquid ejection head other than the liquid ejection unit. The size of the ejection unit insertion opening is smaller than the size of the ejection unit protrusion opening. The sealing member comes in contact with the outer peripheral portion of the liquid ejection unit in a state where the edge portion of the ejection unit insertion opening is bent.

Various embodiments disclose a method for operating a printer apparatus. The method comprising monitoring a utilization rate of each heating element in a first set of heating elements defined by a print head arrangement. Further, the method comprises generating a utilization dataset based upon monitoring of the utilization rate of each heating element in the first set of heating elements print head arrangement. Furthermore, the method includes analyzing the utilization dataset to identify one or more overutilized heating elements of the first set of heating elements. Additionally, the method includes identifying a second set of heating elements defined by the print head arrangement. The second set of heating elements comprises a portion of the first set of heating elements exclusive of the one or more overutilized heating elements. The method further includes processing a print job. The processed print job utilized the second set of heating elements during printing.

An image recording apparatus includes: a plurality of recording heads driven on a basis of drive waveform data; a data storage that retains parameter sets corresponding to the respective recording heads; a simultaneously driven nozzle count detector that detects, for each of the recording heads, a simultaneously driven nozzle count that represents a count of nozzles to be driven at an identical drive timing based on image data to be recorded on a recording medium; a correction parameter selector that selects, for each of the recording heads, a correction parameter corresponding to the detected simultaneously driven nozzle count from among a plurality of correction parameters included in the parameter set corresponding to the recording head; and a drive waveform data generator that corrects reference waveform data using the correction parameter selected for each of the recording heads and generates the drive waveform data for each of the recording heads.

Various embodiments disclose a method for operating a printer apparatus. The method comprising monitoring a utilization rate of each heating element in a first set of heating elements defined by a print head arrangement. Further, the method comprises generating a utilization dataset based upon monitoring of the utilization rate of each heating element in the first set of heating elements print head arrangement. Furthermore, the method includes analyzing the utilization dataset to identify one or more overutilized heating elements of the first set of heating elements. Additionally, the method includes identifying a second set of heating elements defined by the print head arrangement. The second set of heating elements comprises a portion of the first set of heating elements exclusive of the one or more overutilized heating elements. The method further includes processing a print job. The processed print job utilized the second set of heating elements during printing.

Methods and apparatus to control a heater associated with a printing nozzle are disclosed. A method comprising controlling a heater associated with a printing nozzle to reduce a heat output of the heater based on a determination that the printing nozzle is outside a print area and printing an image on a substrate using other printing nozzles while the heat output of the heater is reduced.

An inkjet print apparatus includes a print head discharging ink onto a substrate, the print head including a first heater; a reservoir storing the ink; a first pipe supplying the ink to the reservoir; a second pipe collecting surplus ink; a mixing unit located on the first pipe and mixing the ink; a pump located on the second pipe and pressurizing and supplying the surplus ink to the reservoir; a temperature sensor located between the mixing unit and the print head and sensing a temperature of the ink; and a controller controlling a temperature of at least one of the first heater and the second heater in response to information received from the temperature sensor. The print head includes a heat insulator blocking heat emitted from the first heater between the substrate and the first heater.

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.