A printhead includes a plurality of firing chambers, a plurality of fluid ejectors, and at least one field generating member. Each one of the firing chambers includes a nozzle region to receive printing fluid. The printing fluid includes an ink vehicle having pigments disposed therein. At least one field generating member generates a non-uniform electric field to apply forces to maintain respective pigments in the ink vehicle of the printing fluid in the nozzle region.

A liquid jet head has a head chip which ejects liquid droplets, a nozzle plate in contact with a lower surface of the head chip, a flexible circuit board in contact with the lower surface of the head chip, and a bending member in direct contact with the flexible circuit board and configured to bend the flexible circuit board along a lower corner of the head chip. The nozzle plate and the flexible circuit board contact the lower surface of the head chip in the same plane thereby saving space to enable downsizing of the liquid jet head.

A liquid droplet ejection device according to an embodiment of the present disclosure an object holding unit for holding an object; a first liquid droplet ejection unit having a plurality of first liquid droplet ejection nozzles configured to eject first droplets onto the object, the first liquid droplet ejection nozzle is an electrostatic ejection type nozzle; a second liquid droplet ejection unit having at least one second liquid droplet ejection nozzle configured to eject second droplets including a material different from the first droplet; and a control unit configured to control a relative positional relationship between the second liquid droplet ejection nozzle and the first liquid droplet ejection nozzle, wherein the second liquid droplet ejection unit blocks at least one first liquid droplet ejection nozzle among the plurality of first liquid droplet ejection nozzles by ejecting the second droplets.

A liquid discharge head includes: an actuator substrate; an electromechanical transducer held by the actuator substrate; a damper; and a damper holding substrate holding the damper, wherein the damper disposed between the actuator substrate and the damper holding substrate and joined to the actuator substrate and the damper holding substrate with an adhesive, the damper has a joint portion having a recess or a through hole.

An inkjet apparatus for display manufacturing includes a nozzle unit having a discharge port for discharging ink to a substrate, a charging unit disposed on a side of the nozzle unit and charging the ink, and an accelerating electrode disposed on an opposite side of the nozzle unit with the substrate interposed therebetween, and accelerating the ink towards the substrate by electrical attraction.

An occurrence of leakage is prevented. An inkjet head jets ink. The inkjet head is provided with a head main body, a cooling pipe, a jet-side coupling member, and a cooling-side coupling member, wherein the head main body has a jet flow path through which the ink passes, the cooling pipe has a cooling flow path through which the ink passes as a cooling medium for cooling a drive circuit, the jet-side coupling member is coupled to the head main body, a jet-side branch path branches from an ink flow path into which the ink inflows from an outside of the inkjet head, or from which the ink outflows, the jet-side branch path is communicated with the jet flow path, the jet-side branch path is provided to the jet-side coupling member, and the cooling-side coupling member is coupled to the jet-side coupling member, and is provided with a cooling-side branch path which branches from the ink flow path, and which is communicated with the cooling flow path. The cooling-side coupling member has a coupling surface along one surface of the jet-side coupling member, and along a direction perpendicular to the cooling pipe.

A liquid discharge head includes: a nozzle plate having multiple nozzles; a diaphragm facing an inner face of the nozzle plate; multiple individual chambers between the nozzle plate and the diaphragm, the multiple individual chambers respectively communicating with the multiple nozzles; multiple actuators on a first face of the diaphragm opposite to a second face of the diaphragm facing the multiple individual chambers, the multiple actuators to deform the diaphragm to discharges a liquid in the multiple individual chambers from the multiple nozzles, respectively; a holder facing the multiple actuators and the diaphragm and joined to a peripheral portion of the diaphragm; a first joint at a first position around a periphery of the holder and joining the diaphragm and the holder; and multiple second joints joining the diaphragm and the holder at multiple second positions inside the first position, respectively.