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.

A MEMS device includes a plurality of movable regions, wiring lines extending along a first direction from the movable regions, and electrodes connected to the wiring lines. The electrodes include connection regions for connecting other electrode terminals to the connection regions. A plurality of the connection regions are disposed along a second direction intersecting the first direction. A distance between centers of connection regions that are adjacent in the second direction is longer than a distance between centers of movable regions that are adjacent in the second direction.

Printheads and techniques for manufacturing printheads are disclosed. An example method includes forming drive circuit components in a circuit layer. The method also includes forming a fluidic device that causes fluid to be ejected from a nozzle. The method also includes forming an interconnect layer that couples the drive circuit components.

A liquid discharge apparatus has a head provided with discharge sections which discharge a liquid, a drive circuit configured to generate driving signals for driving the discharge sections and discharging the liquid, a carriage mounted with the head and the drive circuit, and a carriage support section configured and arranged to support the carriage. A shortest distance between the carriage support section and the drive circuit is shorter than a shortest distance between the carriage support section and the discharge section which is closest to the carriage support section.

A liquid discharge apparatus has a head provided with discharge sections which discharge a liquid, a drive circuit configured to generate driving signals for driving the discharge sections and discharging the liquid, a carriage mounted with the head and the drive circuit, a motor configured to move the carriage, and a flushing box configured and arranged to receive the liquid discharged from the discharge sections. The drive circuit is mounted at a position so as not to pass above the flushing box while the carriage is being moved.

A drop ejector array device includes a first plurality and a second plurality of drop ejectors that are alternatingly disposed along an array direction on the substrate surface. A voltage input terminal and a current return terminal are disposed on the substrate surface. A first power bus line connects the first plurality to the voltage input terminal. A second power bus line connects the second plurality to the voltage input terminal. The second power bus line is electrically connected to the first power bus line by a primary power bus connector line. A first current return bus line connects the first plurality to the current return terminal. A second current return bus line connects the second plurality to the current return terminal. The second current return bus line is electrically connected to the first current return bus line by a primary current return bus connector line.

A print head includes ejecting portions ejecting liquid by being supplied with a high voltage signal, a switch group switching between whether or not to supply the high voltage signal to the first ejecting portion group in accordance with a low voltage logic signal, a memory, a high voltage signal input terminal, and a low voltage logic signal input terminal, the print head having a first mode in which the print head executes reading processing of reading information stored in the memory and does not execute ejection control processing of controlling whether or not to supply the high voltage signal to the first ejecting portion group by switching the switch group in accordance with an input signal input from the low voltage logic signal input terminal and a second mode in which the print head does not execute the reading processing and executes the ejection control processing.

A droplet ejecting device includes: a head including N-number drive elements; a driving circuit including N-number waveform signal selectors and N-number power supply circuit selectors; a plurality of power supply circuits connected to the driving circuit; and a control circuit. Each waveform signal selector selects a waveform signal to be outputted to the corresponding drive element from among a plurality of types of waveform signals. Each power supply circuit selectors selects a power supply circuit to be connected to the drive elements from among the plurality of power supply circuits. The control circuit serially transmits, to the driving circuit via a single control line: N-number items of waveform signal designation information each of which designates the waveform signal to be outputted to the corresponding drive element; and N-number items of power supply designation information each of which designates the power supply circuit to be connected to the corresponding drive element.

There is provided print apparatus including: piezoelectric member; individual electrode; first and second common electrodes; voltage application circuit; detection circuit configured to detect a capacitance of a first capacitor configured by the piezoelectric member, the individual electrode, and the first common electrode and a second capacitor configured by the piezoelectric member, the individual electrode, and the second common electrode; first switching element; and control circuit. The control circuit is configured to execute; a first voltage application process to apply a first voltage to the second common electrode in order to discharge the ink; a detection process to detect the capacitance after electrically connecting the piezoelectric member and the detection circuit with the first switching element; and a second voltage application process to apply a second voltage to the second common electrode before the detection process, the second voltage being lower than the first voltage.

A printing apparatus has a conveyance roller configured to convey a sheet in a first direction, an encoder provided at the conveyance roller, a head having a plurality of nozzles aligned in a second direction intersecting with the first direction and being configured to jet liquid to the sheet which is conveyed in the first direction by the conveyance roller and a controller having a power circuit configured to apply voltage to the head for jetting the liquid. The controller is configured to: determine a jetting frequency for the head based on a signal outputted from the encoder; and change an output voltage of the power circuit depending on the determined jetting frequency.