There is provided head including: nozzle configured to discharge liquid by energy generating element; signal generator configured to generate, based on first and second data representing first and second driving waveform, time division multiplex signal including first and second portions of the first driving waveform, and third and fourth portions of the second driving waveform; and separator configured to separate first or second driving waveform signal representing the first or second driving waveform from the time division multiplex signal. The energy generating element is configured to be driven by the first or second driving waveform signal. In the time division multiplex signal, the third portion is aligned between the first and second portions and the second portion is aligned between the third and fourth portions. The time division multiplex signal is capable of transmitting the first and second data via single signal line.

An actuator includes: a frame having a recess; an actuator substrate including a common chamber; a damper between the frame and the actuator substrate, the damper defining a part of a wall of the common chamber of the actuator substrate. The damper includes multiple layers laminated in a lamination direction, and the multiple layers is symmetrical in the lamination direction with respect to a center of the damper in the lamination direction.

A jet parameter generation system according to an embodiment of the present disclosure includes a data acquisition section, and a parameter generation section for generating a predetermined jet parameter, using a predetermined analytical method of taking a predetermined input parameter as an explanatory variable and taking a predetermined jet parameter as an objective variable. The parameter generation section determines which one of a first standard for setting a voltage value with which a drop volume of the liquid to be a reference is obtained and a second standard for setting a voltage value with which an ejection speed of the liquid to be a reference is obtained is to be selected, selects a first explanatory variable group when determining to select the first standard, while selecting a second explanatory variable group when determined to select the second standard, and uses the predetermined analytical method using just selected one of the first explanatory variable group and the second explanatory variable group to thereby generate the predetermined jet parameter.

A liquid discharge head includes: a first member; and a second member bonded to the first member, wherein the first member has: a first protrusion protruding to the second member, a second protrusion protruding to the second member, the second protrusion having a height different from the first protrusion, the second member includes: a first portion bonded to the first protrusion with a first adhesive; and a second portion bonded to the second protrusion with a second adhesive, the second portion having a height different from the first portion, and a type of the second adhesive is different from a type of the first adhesive.

A head includes: a silicon substrate; an insulating film on the silicon substrate; an electrode wiring on the insulating film; a flexible wiring connected to the electrode wiring; and a conductive film electrically connects the flexible wiring and the electrode wiring in a bonding area. The silicon substrate has an exposed area on a surface of the silicon substrate facing the insulating film, and the exposed area is in a vicinity of the bonding area and is exposed from the insulating film.

A liquid ejection apparatus includes a liquid ejection unit with a plurality of nozzles and a corresponding plurality of actuators. A drive waveform generation circuit is configured to generate drive waveforms having different drive timings. An actuator drive circuit is configured to apply a first drive waveform to a first actuator in a liquid ejection operation and a second drive waveform to a second actuator in the liquid ejection operation during which the first and second actuators are to be driven at a same nominal time. The first driving waveform is different from the second drive waveform, and the first actuator is at a position electrically closer along a predetermined direction to a power supply electrode than is the second actuator.

A piezoelectric actuator includes: a diaphragm plate; a first electrode provided on or over the diaphragm plate; a piezoelectric substance layer provided on or over the first electrode; and a second electrode provided on or over the piezoelectric substance layer; wherein the piezoelectric substance layer includes a plurality of active portions sandwiched between the first electrode and the second electrode, either one of the first electrode and the second electrode is an individual electrode provided individually for each of the plurality of active portions, the other of the first electrode and the second electrode is a common electrode that is common to the plurality of active portions, and lead-out wiring is multiple-connected to the individual electrode.

In one example in accordance with the present disclosure, a fluidic ejection controller is described. The fluidic ejection controller includes a firing board to pass electrical control signals for ejecting fluid from a fluidic ejection device. An ejection board of the fluidic ejection controller is electrically coupled to, and selectively removable from, the firing board to pass the electrical control signals to the fluidic ejection device. Electrical pins are disposed on the ejection board in a pattern that matches a pattern of electrical pads on the fluidic ejection device. The electrical pins interface with corresponding electrical pads to pass the electrical control signals from the ejection board to the fluidic ejection device.

A filter is compressed between facing surfaces of a first configuration component and a second configuration component, and a molten resin is poured in such a compressed state. Injection molding of the first configuration component and the second configuration component, joining of the configuration components, and sealing of the circumference of the filter are performed by a pair of metal molds.

A MEMS device includes a wire that is formed of a conductive portion embedded into a recess opened in a first face of a substrate and a bump electrode that is electrically connected to the wire. A total width, in a second direction intersecting a first direction along which the wire extends on the first face, of an opening of the recess in a connection region where the wire and the bump electrode are electrically connected to each other is narrower than a width, in the second direction, of an opening of the recess in a region outside the connection region.