A circuit for driving first and second groups of actuating elements for ejection of droplets from a printhead, the circuit comprising: a drive circuit configured to provide a drive waveform to first electrodes of the first and second groups; and a voltage offset circuit configured to provide a voltage offset to the second electrodes of the first or second groups to bias the second electrodes of the first and second groups relative to each other.

A liquid ejecting head includes a flow path forming substrate in which a pressure generating chamber which communicates with a nozzle which ejects a liquid is formed by a partitioning wall, and a piezoelectric actuator in which a first electrode, a piezoelectric layer, and a second electrode are laminated, in which the piezoelectric layer includes a region which is interposed between the first electrode and the second electrode in a lamination direction, and in which when viewed in plan view from the lamination direction, the region overlaps at least a portion of the edges of each side of an opening of the pressure generating chamber on the piezoelectric actuator side and does not overlap one of the first electrode and the second electrode in at least a portion of the opening.

A battery-powered printer includes a battery receptacle in which a battery is detachably mounted, a printing mechanism driven by electric power output from the battery during printing on a recording medium, and processor configured to identify a type of the battery mounted in the battery receptacle according to output capacity, and change a drive parameter under which the printing mechanism is driven, depending on the identified type of battery.

A printing apparatus comprises: a plurality of printing elements; driving circuits that have at least one source follower transistor and correspond to each of the plurality of printing elements; and a control unit configured to, in a case where a number of printing elements driven simultaneously does not exceed a predetermined number, perform a first control for driving the at least one source follower transistor by a fixed pulse width irrespective of the number of printing elements driven simultaneously, and, in a case where the number of printing elements driven simultaneously exceed the predetermined number, perform a second control for changing a pulse width to drive the at least one source follower transistor based on the number of printing elements driven simultaneously.

A control system includes a control circuit. The control circuit is to be connected to a head unit including first driving elements and second driving elements. Based on an input print data, the control circuit applies a first signal to the first driving element and applies a second signal to the second driving elements. The control circuit changes the first signal to a third signal in a first time and changes the second signal to a fourth signal in a second time. Based on an input print data, the control circuit applies the third signal to the first driving element and applies the fourth signal to the second driving elements.

A method for printing image data with a printing system having a staggered array of overlapping printheads. Adjacent printheads overlap in the cross-track direction defining an overlap region such that image pixels corresponding to the overlap region can be printed with either first or second printheads. The method includes defining an initial row interval N and an initial position of a transition boundary within the overlap region. N rows of image pixels are then printed wherein image pixels on one side of the transition boundary are printed using the first printhead and image pixels on the other side of the transition boundary are printed using the second printhead. A random process is used to iteratively determine updated row intervals, where the position of the transition boundary is shifted by an increment amount of between one pixel and three pixels for each row interval.

In a droplet discharge method, a plurality of grids corresponding to areas of a substrate are set. A discharge amount for each grid is determined based on a difference in discharge amount according to a temperature change of ink to be discharged from nozzles that are designated for the plurality of grids respectively. An ink drop map for discharging ink having the discharge amount for each grid is created. Droplets are discharged through the nozzles according to the ink drop map to form a thick film having a predetermined thickness on the substrate.

A liquid discharge apparatus includes a liquid discharge head that includes a plurality of capacitive loads driven by being supplied with a drive signal and discharges a liquid by driving the plurality of capacitive loads, and a capacitive load drive circuit, in which the capacitive load drive circuit includes a correction circuit, a modulation circuit, an amplification circuit, a demodulation circuit, and a feedback circuit, and the correction circuit outputs the correction base drive signal corrected according to the number of drive capacitive loads driven by the drive signal among the plurality of capacitive loads.

The disclosure relates to a method for printing a paper by a digital printing system which has a plurality of ink application units for applying printing ink of different colours to the paper. The paper to be printed is guided past the ink application units in a feed direction. The digital printing system has a device which is designed and suitable for preventing or reducing the formation of condensation on the ink application units, and this device is used to prevent or reduce the formation of condensation on the ink application units. The device has a temperature-control device and an electrical controller, wherein the temperature-control device is designed to influence a temperature of the ink application units, and the electrical controller is designed to control the temperature-control device in such a way that the ink application units have different temperatures. The temperatures of the ink application units increase in the feed direction and temperatures of two adjacent ink application units differ by at least 0.5 C. and by at most 1.5 C. The temperatures of the first ink application unit in the feed direction and of the last ink application unit in the feed direction differ by at most 10 C.

A recording device includes a head including a plurality of nozzles that are arranged at predetermined intervals in a first direction, the plurality of nozzles being configured to eject liquid, and a controller. The controller is configured to, in a case where the number of the abnormal nozzles among the plurality of nozzles is equal to or greater than the predetermined number and the number of the abnormal nozzles, among a part of the plurality of nozzles in which an interval in the first direction is a preset interval longer than the predetermined interval, is less than the predetermined number, cause the head to eject liquid from the part of nozzles to record an image with a resolution in which a resolution in the first direction is lower than a resolution corresponding to the predetermined interval.