Seiko Epson Corporation

Ryosuke Tsuchihashi

Kinya Ozawa

Hiroshige Owaki

Hirokazu Nunokawa

Ryoichi Tanaka

Masashi Kamibayashi

Atsushi Muto

Nobuaki Azami

Teruaki Kaieda

Shushi Makita

Noriaki Yamashita

Atsuhiro Hashimoto

A liquid ejecting apparatus includes ejecting sections that eject droplets from nozzles according with a driving signal supplied thereto. The driving signal includes a plurality of ejection pulses during one cycle. The plurality of ejection pulses includes a final ejection pulse corresponding to a final droplet. The final ejection pulse includes an expansion element that expands a pressure chamber, an expansion-maintaining element that maintains the expansion of the pressure chamber, a contraction element that contracts the pressure chamber, and a vibration-damping element that reduces residual vibration of liquid in the pressure chamber. The time width of the sum of the expansion element and the expansion-maintaining element of the final ejection pulse is longer than a length that is 0.5 multiplied by the natural-vibration cycle of the ejecting sections, and is shorter than a length that is 1.0 multiplied by the natural-vibration cycle.

Liquid ejecting apparatus

A liquid ejecting apparatus comprises a liquid ejecting head ejecting liquid, an identification information acquisition device configured to acquire identification information from the liquid ejecting head, a storage device in which the identification information is stored, and a control device configured to, in a case in which, when a replacement for the liquid ejecting head is made, the liquid ejecting head being a replacement target has been attached again, notify that the liquid ejecting head being the replacement target is in an attached state again, based on the identification information stored in the storage device.

Liquid ejecting apparatus and driving method for liquid ejecting apparatus

A liquid discharge device includes a liquid discharge head that includes a nozzle from which liquid is discharged and a liquid channel communicating with the nozzle, and that discharges liquid from the nozzle. The nozzle has an inner wall surface having an uneven pattern including a recess where the inner diameter of the nozzle is increased and a projection where the inner diameter of the nozzle is smaller than that in the recess. In a case where ink is continuously discharged from an identical nozzle, at a time when a meniscus in the nozzle after previous discharge is located closer to an initial position before discharge than a center position between the initial position and a position at which the meniscus is most greatly drawn toward the liquid channel, subsequent discharge is performed.

Liquid discharge device, method for controlling liquid discharge device, and device driver

To reduce the number of nozzles in an unstable state after a nozzle inspection, a fluid discharge device includes a discharge head capable of discharging a fluid from nozzle, a nozzle inspection process for inspecting a state of discharging of the fluid from the nozzle, and a controller for subjecting the nozzle to a pre-process for discharging the fluid under a discharge condition that a nozzle in an unstable state be put into a dot omission state, subsequently discharging the fluid for the sake of inspection, and executing an inspection process by the nozzle inspection part.

Fluid discharge device, nozzle inspection method, and medium on which nozzle inspection program is recorded

A liquid ejecting apparatus has a head component that ejects a liquid through nozzle openings to attach the liquid to an object. The liquid contains a particulate material having a particle size of 200 nm to 1 &#x3bc;m, both inclusive, and the head component discharges the liquid in droplets weighing 1 ng to 7 ng, both inclusive, in a way that the droplets reach the object at a velocity of 5 m/s to 9 m/s, both inclusive.

A liquid ejecting head includes a nozzle; a pressure chamber communicating with the nozzle; a pressure chamber substrate having pressure chambers defined by partition walls; a pressure generator generating pressure change in liquid inside the pressure chamber; and a bottom joined to the pressure chamber substrate by adhesive; and an organic solvent-based ink ejected from the nozzle by driving a piezoelectric element and generating the pressure change in the pressure chamber, and when a width of the pressure chamber in an arrangement direction of the pressure chambers is W and a width of the adhesive in the arrangement direction of the pressure chambers in a state where the adhesive has flowed out from between a lower end portion of the partition wall and the bottom to the pressure chamber side and is then solidified is L, the following expression is satisfied, 0.05&#x2266;L/W&#x2266;0.3.

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Matsumoto, Japan

Ryosuke Tsuchihashi