Seiko Epson Corporation

Takanori Aimono

Shotaro Tamai

Motoki Takabe

Takahiro Katakura

Masao Nakayama

Eiju Hirai

Yuma Fukuzawa

Harunobu Koike

Masanori Mikoshiba

Koji Sumi

Toshihiro Shimizu

Yasuhiro Itayama

Hitoshi Takaai

Shohei Mizuta

Shun Katsuie

Jingling Wang

Yuta Okawa

Junichi Karasawa

Yasushi Yamazaki

Tatsuo Sawasaki

Yuki Ishii

Akinori Taniuchi

Osamu Tonomura

Yoshihiro Hokari

Chihiro Nishi

Noritaka Mochizuki

Takashi Kasahara

A liquid ejecting apparatus includes a nozzle for ejecting a liquid, first to fourth pressure chambers communicating with the nozzle, first to fourth driving elements provided corresponding to each of the first to fourth pressure chambers, and a control section that controls the first to fourth driving elements. The control section is capable of executing a first ejection mode in which all of the first to fourth driving elements are driven to eject a liquid from the nozzle, and a second ejection mode in which only some driving elements among the first to fourth driving elements are driven to eject a liquid from the nozzle.

Liquid ejecting apparatus

A liquid discharge head including a diaphragm, a pressure chamber substrate that is laminated on the diaphragm, and a piezoelectric element that includes a first active portion and a second active portion, and is laminated on the diaphragm, in which when a direction in which the first active portion and the second active portion are arranged is defined as a second direction when viewed in a lamination direction, and a direction orthogonal to the lamination direction and the second direction is defined as a third direction, and the piezoelectric element includes a first region which is a region in which both the first active portion and the second active portion are provided, and a second region which is a region in which one of the first active portion and the second active portion is provided and the other is not provided.

Liquid discharge head and liquid discharge apparatus

A liquid ejecting head includes: a nozzle; first to fourth pressure chambers; a communication flow path communicating between the nozzle and the first to fourth pressure chambers; first to fourth driving elements; a first common liquid chamber communicating with the first and the second pressure chambers; and a second common liquid chamber communicating with the third and the fourth pressure chambers. A first joining position from the first pressure chamber and the second pressure chamber to the nozzle is closer to end portions of the first pressure chamber and the second pressure chamber on a nozzle side than to the nozzle, and a second joining position from the third pressure chamber and the fourth pressure chamber to the nozzle is closer to end portions of the third pressure chamber and the fourth pressure chamber on the nozzle side than to the nozzle.

Liquid ejecting head and liquid ejecting apparatus

A liquid ejecting head includes a nozzle, first and second pressure chambers communicating with the nozzle, a first driving element configured to change a pressure in the first pressure chamber, and a second driving element configured to change a pressure in the second pressure chamber. A first flow path length of a flow path from the first pressure chamber to the nozzle is shorter than a second flow path length of a flow path from the second pressure chamber to the nozzle. In a driving method of a liquid ejecting head, at least the first and second driving elements are driven to eject a liquid from the nozzle, and a driving timing of the second driving element is earlier than a driving timing of the first driving element.

Driving method of liquid ejecting head and liquid ejecting apparatus

A liquid ejecting apparatus comprises a liquid ejecting head having a drive element that is driven in accordance with a drive signal to eject liquid droplets from a nozzle. The drive signal comprises a first drive waveform including a first contraction waveform to eject a first liquid droplet and a second drive waveform including a second contraction waveform to eject a second liquid droplet which merges with the first liquid droplet before the first liquid droplet lands onto a medium. The first contraction waveform includes a first segment waveform along which the potential changes, a second segment waveform along which the potential is kept, and a third segment waveform along which the potential changes. The second contraction waveform includes a fourth segment waveform along which the potential changes, a fifth segment waveform along which the potential is kept, and a sixth segment waveform along which the potential changes.

Liquid ejecting apparatus and method for controlling liquid ejecting head

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 ejecting head includes: a nozzle plate including a first-nozzle; first and second pressure chambers arranged side by side in a first-direction; third and fourth pressure chambers arranged side by side in the first-direction; a first-communication-flow-path extending along the nozzle plate, coupled to the first-nozzle, and communicating with the first to fourth pressure chambers; a first-common-liquid-chamber communicating with the first and second pressure chambers; and a second-common-liquid-chamber communicating with the third and fourth pressure chambers. The first and second pressure chambers and the third and fourth pressure chambers are shifted in a second-direction orthogonal to the first-direction. When a width of the first communication flow path in the first-direction at a position overlapping the first-nozzle is defined as a first-width, and a width of the first-pressure-chamber in the first-direction is defined as a pressure chamber width, the first-width is equal to or greater than the pressure chamber width.

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 method for producing a piezoelectric actuator including forming a vibration plate, forming a first electrode on the vibration plate, forming a piezoelectric layer on the first electrode, and forming a second electrode on the piezoelectric layer, wherein the forming the vibration plate has a single layer forming step including forming a metal layer containing zirconium by a gas phase method, and forming a metal oxide layer by firing the metal layer, the single layer forming step is repeated, thereby forming the vibration plate in which the metal oxide layers are stacked, and the metal oxide layer has a thickness less than 200 nm.

Method for producing piezoelectric actuator

A liquid ejecting head includes: a nozzle; first to fourth pressure chambers; a communication flow path coupled to the nozzle and communicating between the nozzle and the first to fourth pressure chambers; first to fourth flow paths coupling the communication flow path and the first to fourth pressure chambers; a first-common-liquid-chamber communicating with the first-pressure-chamber and the second-pressure-chamber; and a second-common-liquid-chamber communicating with the third-pressure-chamber and the fourth-pressure-chamber. The first-flow-path and the second-flow-path are arranged side by side in a first-direction, the third-flow-path and the fourth-flow-path are arranged side by side in the first-direction, and the first-flow-path and the second-flow-path, and the third-flow-path and the fourth-flow-path are arranged to be shifted in a second-direction orthogonal to the first-direction. The first-flow-path is shifted from each of the third-flow-path and the fourth-flow-path in the first-direction, and the second-flow-path is shifted from each of the third-flow-path and the fourth-flow-path in the first-direction.

Provided is a drive method of a liquid discharging head including a first step of acquiring physical property information indicating a physical property of liquid in the liquid discharging head, a second step of determining a waveform of a drive signal based on the physical property information, a third step of forming a first liquid column by supplying a first waveform, which is included in a first drive signal among the drive signals having the waveforms determined in the second step, to a drive element, and a fourth step of, when the first liquid column is formed, forming a second liquid column by supplying a second waveform, which is included in a second drive signal among the drive signals having the waveforms determined in the second step, to the drive element, and thereafter discharging a part or all of liquid constituting the second liquid column as a droplet.

Drive method of liquid discharging head and liquid discharging apparatus

Provided is a drive method of a liquid discharging head including a first step of forming a first liquid column by supplying a drive signal having a first waveform to a drive element, and a second step of, when the first liquid column is formed, forming a second liquid column by supplying a drive signal having a second waveform to the drive element, and thereafter discharging a part or all of liquid constituting the second liquid column as a droplet, in which when a drive signal having the first waveform but not having the second waveform is supplied to the drive element, a droplet is not discharged from the discharging portion, and when a drive signal having the second waveform but not having the first waveform is supplied to the drive element, a droplet is not discharged from the discharging portion.

A liquid ejecting head includes: a first pressure chamber to which a first liquid is supplied; a first drive element that applies pressure to the first liquid in the first pressure chamber; a second pressure chamber to which a second liquid is supplied; a second drive element that applies pressure to the second liquid in the second pressure chamber; a nozzle channel which has one end communicating with the first pressure chamber and another end communicating with the second pressure chamber and in which the first liquid supplied from the first pressure chamber and the second liquid supplied from the second pressure chamber are mixed; and a nozzle that is provided in the nozzle channel and ejects a mixture of the first liquid and the second liquid.

Liquid ejecting head, liquid ejecting apparatus, and liquid ejecting method

A communication plate in which are provided a first communication channel communicating with the first pressure chamber and the second pressure chamber and a first common liquid chamber communicating with the first pressure chamber and the second pressure chamber at positions different from positions at which the first communication channel communicates with the first pressure chamber and the second pressure chamber, and a nozzle substrate in which a first nozzle communicating with the first pressure chamber and the second pressure chamber in common via the first communication channel is provided. A second communication channel communicating with the first common liquid chamber and communicating with the first pressure chamber and the second pressure chamber in common is provided in the pressure chamber substrate or the communication plate.

The control portion controls (i) a discharging operation of discharging the liquid from the plurality of nozzles by driving the plurality of energy generation elements and (ii) a pressurization operation of pressurizing the liquid from the individual flow path side in a state in which the plurality of nozzles are sealed by the sealing portion.

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Matsumoto, Japan

Takanori Aimono