A liquid discharge apparatus includes a liquid discharge head and a head drive controller. The liquid discharge head includes an actuator including an electromechanical transducer element. The head drive controller controls the liquid discharge head. The head drive controller includes a drive waveform generator and a voltage updater. The drive waveform generator generates a drive waveform to be applied to the electromechanical transducer element. The voltage updater updates a voltage value of the drive waveform to a larger value with an elapse of time. The voltage updater sets a time interval of update of the voltage value to be longer as a number of times of the update is greater.

A liquid discharging apparatus has: a head unit that discharges a liquid; and a control unit that controls the operation of the head unit. The head unit has: a driving circuit board that includes a driving signal output circuit that outputs a driving signal, and also includes a substrate on which the driving signal output circuit is mounted; a discharge head that includes a driving element driven by the driving signal, a switching circuit that selectively supplies the driving signal to the driving element, and a nozzle plate in which a nozzle is formed, the nozzle discharging the liquid by being driven by the driving element; a first flow path member through which the liquid to be discharged from the nozzle passes; and a first heat dissipating member coupled to the driving circuit board. The first heat dissipating member is coupled to the first flow path member.

A liquid ejecting apparatus includes: an ejection section ejecting a liquid; a state detection section detecting a state of the ejection section; a determination section determining whether or not the ejection section has an abnormality; a recording section recording a determination result of the determination section; a temperature detection section detecting a temperature of the ejection section; and a maintenance section executing maintenance processing on the ejection section, in which when the recording section records abnormality information indicating the abnormality of the ejection section as the determination result by determining that the abnormality occurred in the ejection section by the determination section, and the temperature detection section detects a temperature that is out of an inspection temperature range in which the state detection section detects the state of the ejection section, the abnormality information recorded in the recording section is reset if the maintenance section executes the maintenance processing.

A liquid ejecting apparatus includes a digital signal output circuit and a liquid accommodating container, in which the print head includes a supply port, a nozzle plate, a substrate having first and second sides positioned opposite to each other, third and fourth sides positioned opposite to each other, a first surface, and a second surface, a connector to which the digital signal is input, and an integrated circuit to which the digital signal is input via the connector and that outputs an abnormality detection signal, the connector is provided on the first surface, the integrated circuit is provided on the second surface, the substrate includes an annular wiring electrically coupled to the integrated circuit, and the annular wiring is disposed in an annular shape along an outer periphery of the substrate including the first side, the second side, the third side, and the fourth side.

There is provided a liquid discharge apparatus including: a first shift register; a plurality of discharge sections configured to discharge droplets based on head control data; and a first wiring for transmitting the head control data to the first shift register, in which the apparatus is configured to be operated in a first print mode in which printing is performed with a first gradation number, and in a second print mode in which printing is performed with a second gradation number smaller than the first gradation number, based on the head control data, in the first print mode, a data size of the head control data is a sum of a first data size, a second data size, and a third data size, and in the second print mode, a data size of the head control data is a sum of the first data size and the second data size.

A liquid ejecting apparatus includes a print head, in which the print head includes a substrate having first, second, third and fourth sides, a first surface, a second surface, a connector, a first integrated circuit, and a second integrated circuit, the connector includes a first end with a shortest distance to the third side and a second end with a shortest distance to the fourth side and is provided on the first surface so that a plurality of terminals are arranged along the first side, the first integrated circuit is provided on the second surface, a shortest distance between the first end and the first integrated circuit is shorter than a shortest distance between the second end and the first integrated circuit, and a shortest distance between the second end and the second integrated circuit is shorter than a shortest distance between the first end and the second integrated circuit.

There is provided a liquid discharge apparatus including: a discharge section; a first wiring for transmitting a setting information signal group that has a first setting information signal and a second setting information signal and a discharge control signal group; and a second wiring for transmitting a driving signal, in which the apparatus is configured to be operated in a first print mode in which printing is performed with a first gradation number according to the setting information signal group, and in a second print mode in which printing is performed with a second gradation number smaller than the first gradation number, and in the second print mode, the droplets are discharged from the discharge section according to the first setting information signal and the second setting information signal in which bit data of the first setting information signal is inverted.

A liquid ejecting apparatus includes a print head, a digital signal output circuit, and a liquid accommodating container, in which the print head includes a supply port to which the liquid is supplied from the liquid accommodating container, a nozzle plate having a plurality of nozzles that eject the liquid, a substrate that has a first surface and a second surface different from the first surface, a connector to which the digital signal is input, an integrated circuit to which the digital signal is input via the connector and that outputs an abnormality detection signal indicating presence or absence of an abnormality in the print head, and a first capacitor electrically coupled to the integrated circuit, the connector and the first capacitor are provided on the first surface, and the integrated circuit is provided on the second surface.

A liquid discharge device and a method of discharging liquid. The liquid discharge device includes a head driver to drive an actuator element to generate force to discharge an ink droplet from a head onto an object to be conveyed, the object to be conveyed moving relative to the head, and a discharge controller. The discharge controller and the method includes computing a first drive cycle according to an amount of relative movement of the object moving relative to a head, adjusting the first drive cycle to a value within a second cycle range different from a first cycle range in which an ink droplet is abnormally discharged from the head, obtaining a second drive cycle as a result of adjustment performed on the first drive cycle, every time the second drive cycle passes one or more times, and adjusting the first drive cycle.

The invention relates to a printing method for a digital printing device, comprising a print head having a plurality of printing systems and comprising at least one control apparatus for feeding control signals to the printing systems for the production of ink drops. Each printing system has a nozzle, at least one ink chamber and an activator, e.g. a piezoelectric activator, which is associated with the at least one ink chamber, for the discharge of ink drops from the ink chamber in question via the nozzle in question onto a substrate to be printed on, as a response to a control signal. In the control apparatus, only a single waveform for the control signal having a specified time curve is stored for ink drops of all sizes, comprising, for example, optionally an initial waiting time, a first edge, followed by a first holding time, and, after the first holding time, a second, opposite edge, optionally followed by a second holding time. The size and/or speed of ink drops is varied by virtue of the fact that, at most for a single, intrinsic drop size, the entire stored waveform is transferred as a control signal to the activator in question, while for all other, effective drop sizes, only part of the common, stored waveform is transferred to the activator in question, namely one or more selected portions, while one or more other portions of the stored, common waveform are not supplied to the activator in question in the control signal.