Seiko Epson Corporation

Jingling Wang

Motoki Takabe

Masanori Mikoshiba

Takanori Aimono

Yasuhiro Itayama

Masaki Mori

Yu Shiozawa

A liquid discharge head includes an individual electrode, a common electrode, a piezoelectric body that is provided between the individual electrode and the common electrode for applying pressure to liquid in the pressure chambers, a drive wiring that applies a voltage so as to drive the piezoelectric body, a detection resistor that is formed of the same material as any of the individual electrode, the common electrode, and the drive wiring for detecting temperature of the liquid in the pressure chambers, and a sealing substrate that has a wall portion and a ceiling portion, and protects the piezoelectric body by the wall portion and the ceiling portion. The detection resistor is provided to have a part overlapping the wall portion which is shorter than a part not overlapping the wall portion when viewed along a lamination direction of the piezoelectric body, the individual electrode, and the common electrode.

Liquid discharge head and liquid discharge device

A liquid discharge apparatus includes a pressure chamber substrate laminated on a first surface of a diaphragm and including a partition wall partitioning a pressure chamber communicating with a nozzle for discharging liquid, a piezoelectric element laminated on a second surface of the diaphragm and including a first active portion that overlaps a center of the pressure chamber when viewed in a thickness direction of the diaphragm and a second active portion that overlaps the pressure chamber at a position closer to an outer edge of the pressure chamber than the first active portion, and a drive signal generation portion that generates a drive signal, and a shrinkage step is executed in which a first period during which a first shrinkage element is supplied to the first active portion and a second period during which a second shrinkage element is supplied to the second active portion overlap.

Liquid discharge apparatus

A liquid discharge apparatus includes a diaphragm, a pressure chamber substrate including a partition wall partitioning a pressure chamber communicating with a nozzle discharging liquid, a piezoelectric element including a first active portion that overlaps a center of the pressure chamber and a second active portion that overlaps the pressure chamber at a position closer to an outer edge of the pressure chamber than the first active portion, and a drive signal generation portion that generates a discharge signal for discharging the liquid by being supplied to one of the first active portion and the second active portion and a correction signal that is supplied to the other of the first active portion and the second active portion, in which a potential of the discharge signal changes over time and a potential of the correction signal is constant during a discharge period for discharging the liquid.

Liquid discharge apparatus and method of driving liquid discharge head

A liquid ejecting head in which a first electrode layer, a piezoelectric layer, and a second electrode layer of a piezoelectric element are laminated, a pressure chamber, which is partitioned by a partition wall, has an elongated shape, in a structure including the diaphragm and the piezoelectric element including an active portion and a non-active portion lateral direction, a first position is a position on an inner side of the active portion when viewed in the thickness direction, a second position is a position on an inner side of the non-active portion and closest to a boundary between the pressure chamber and the partition wall, and EI/EI≤40, wherein EIis a bending rigidity of the active portion at the first position and EIis a bending rigidity of the non-active portion at the second position.

Liquid ejecting head and liquid ejecting apparatus

A liquid ejecting head includes: an actuator including a piezoelectric element and a vibrating plate; and a pressure chamber substrate including a pressure chamber whose volume changes when the vibrating plate deforms, in which 0.35&#xd7;FR1&#x2264;FR2&#x3c;1.00&#xd7;FR1, where one position in a longitudinal direction of the pressure chamber is a first position, another position closer than the first position to an end of the pressure chamber in the longitudinal direction of the pressure chamber is a second position, bending rigidity of the actuator in the thickness direction at the first position is FR1, and bending rigidity of the actuator in the thickness direction at the second position is FR2.

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Shiojiri, Japan

Jingling Wang