An integrated circuit is disclosed. The integrated circuit includes an actuator to eject a fluid in response to a fire signal. The integrated circuit also includes a monitor circuit set by the fire signal to block the fire signal to the actuator circuit after a selected duration.

A liquid ejecting apparatus includes an ejection portion that ejects a reactive ink, a driving circuit that generates a driving signal to drive the ejection portion, a heat sink that dissipates heat generated in the driving circuit due to generation of the driving signal, and a heat conduction member that conducts the heat generated in the driving circuit to the heat sink. The heat conduction member includes a heat conductive material with an insulating property whose state is not changed by a chemical reaction with the reactive ink, and a reinforcing member with an insulating property whose state is not changed by a chemical reaction with the reactive ink.

A drive circuit (100) for driving actuators of a printhead (97) from a common drive waveform has a switching circuit (32) for coupling the common drive waveform to an actuator (1,2), and a timing circuit (10) to control the switching circuit to form a drive pulse from the common drive waveform. The drive pulse is trimmed by controlling a duration (TTRIM) of a step at an intermediate level (VHOLD) in the drive pulse. This can improve the trade-off between available range of trimming and thermal efficiency because the voltage drop across the switching circuit can be reduced, compared to trimming only the height. Decoupling during a flat portion of the common drive waveform can enable the timing of the decoupling to be more relaxed compared to decoupling during a slope. Such relaxing can enable costs, complexity and thermal loading to be reduced.

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.

There is provided a liquid discharge apparatus includes an integrated circuit that has a first output terminal outputting a first control signal and a second output terminal outputting a second control signal, a first transistor in which a second terminal and a third terminal are electrically coupled to each other is made according to the first control signal input to a first terminal, and a second transistor in which a fifth terminal and a sixth terminal are electrically coupled to each other is made according to the second control signal input to a fourth terminal, a shortest distance between the first output terminal and the first terminal is shorter than that between the first output terminal and the second terminal, and a shortest distance between the second output terminal and the fourth terminal is shorter than that between the second output terminal and the fifth terminal.

There is provided a liquid discharge apparatus includes a first transistor in which a second terminal and a third terminal are electrically coupled to according to a first terminal, and a second transistor in which a fifth terminal and a sixth terminal are electrically coupled to according to a fourth terminal, a first contact portion where the first terminal is in contact is smaller than a second contact portion where the second terminal is in contact, the second contact portion is smaller than a third contact portion where the third terminal is in contact, a fourth contact portion where the fourth terminal is in contact is smaller than a fifth contact portion where the fifth terminal is in contact, and the fifth contact portion is smaller than a sixth contact portion where the sixth terminal is in contact.

A head holder has an opening through which a space between the head holder and a conveyer communicates with an inside of the head holder. Ahead cooler includes a blower configured to blow air into the head holder from an outside of the head holder with a flow rate of blow air and a suction unit configured to suction air from the head holder with a flow rate of suction air. The head cooler generates cooling air for cooling an ink-jet head inside the head holder by the blower and the suction unit. A controller controls the flow rate of blow air and the flow rate of suction air such that air containing ink mist is suctioned into the head holder through the opening.

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.

A liquid discharge head includes a plurality of pressure generating elements configured to generate pressure to discharge a liquid, a plurality of wirings configured to transmit a drive signal to the plurality of pressure generating elements, respectively, a plurality of integrated circuits configured to drive the plurality of pressure generating elements, respectively, the plurality of integrated circuits being provided on the plurality of wirings, respectively, and a heat sink configured to contact the plurality of integrated circuits to dissipate heat in the plurality of integrated circuits. The heat sink includes a first dissipation part that directly contacts one of the plurality of integrated circuits, and a second dissipating part that contacts another of the plurality of integrated circuits via one of the plurality of wirings.

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.