公开(公告)号：US20220250379A1

公开(公告)日：2022-08-11

申请号：US17650131

申请日：2022-02-07

Applicant: SEIKO EPSON CORPORATION

Inventor： Toshiro MURAYAMA ,  Atsushi TOYOFUKU ,  Shunya FUKUDA ,  Takahiro KATAKURA

IPC: B41J2/045

Abstract: acquiring second timing information regarding a timing at which the flight distance of the droplet reaches the first distance when each of the plurality of waveform candidates indicated by the second waveform information is used, and a determination step of determining a waveform of each of the first drive pulse and the second drive pulse based on the first timing information and the second timing information.

公开(公告)号：US20220063268A1

公开(公告)日：2022-03-03

申请号：US17445873

申请日：2021-08-25

Applicant: SEIKO EPSON CORPORATION

Inventor： Atsushi TOYOFUKU ,  Toshiro MURAYAMA ,  Takahiro KATAKURA

IPC: B41J2/045

Abstract: A drive-waveform determination method determines a waveform of a first drive pulse to be applied to a drive element included in a first liquid discharging head that discharges liquid. The drive-waveform determination method includes: a first step of obtaining second waveform information regarding a waveform of a second drive pulse to be applied to a drive element included in a second liquid discharging head that discharges liquid; and a second step of determining the waveform of the first drive pulse, based on the second waveform information.

公开(公告)号：US20220032616A1

公开(公告)日：2022-02-03

申请号：US17443594

申请日：2021-07-27

Applicant: SEIKO EPSON CORPORATION

Inventor： Atsushi TOYOFUKU ,  Toshiro MURAYAMA ,  Takahiro KATAKURA

IPC: B41J2/045

Abstract: A driving waveform determining method with which a waveform of a driving pulse applied to a driving element provided in a liquid ejecting head that ejects a liquid is determined includes: a first step of determining a waveform candidate of the driving pulse; a second step of notifying a user of candidate information of the waveform candidate; a third step of receiving an instruction issued by the user in accordance with the candidate information; and a fourth step of determining the waveform of the driving pulse in accordance with the instruction.

公开(公告)号：US20200207081A1

公开(公告)日：2020-07-02

申请号：US16722600

申请日：2019-12-20

Applicant: SEIKO EPSON CORPORATION

Inventor： Takahiro KATAKURA ,  Hirofumi SAKAI ,  Keigo SUGAI ,  Shinichi NAKAMURA

IPC: B41J2/045 ,  B41J2/145 ,  B41J2/14

Abstract: A liquid-discharging-head includes a nozzle having a first-nozzle-portion having a first-sectional-area and a second-nozzle-portion having a second-sectional-area larger than the first-sectional-area, a liquid chamber which communicates with the nozzle, and a piezoelectric-element which changes a pressure inside the liquid chamber, in which the piezoelectric-element is driven from the control section, and the liquid-discharging-head executes a first control in which an apex of a liquid surface is drawn into the second-nozzle-portion in a state in which an inner wall surface of the first-nozzle-portion is covered by a liquid film by decreasing the pressure inside the liquid chamber, and a second control in which a shape of the apex of the liquid surface is inverted to a protruding shape towed the opening and the droplet is discharged from the nozzle by increasing the pressure inside the liquid chamber in a state in which the inner wall surface is covered by the liquid film.

公开(公告)号：US20180281411A1

公开(公告)日：2018-10-04

申请号：US15919378

申请日：2018-03-13

Applicant: Seiko Epson Corporation

Inventor： Takahiro KATAKURA ,  Keigo SUGAI ,  Hirofumi SAKAI ,  Shinichi NAKAMURA ,  Junichi SANO

IPC: B41J2/14 ,  B41J2/16 ,  B41J2/175

CPC classification number: B41J2/14274 ,  B41J2/14072 ,  B41J2/1626 ,  B41J2/17593 ,  B41J2/18 ,  B41J2002/14306 ,  B41J2202/05 ,  B41J2202/12

Abstract: A liquid ejecting apparatus includes a liquid chamber in communication with a nozzle, a volume changing unit configured to change a volume of the liquid chamber, an inflow passage through which the liquid flows into the liquid chamber, an outflow passage through which the liquid flows out of the liquid chamber, a passage resistance changing unit configured to change a passage resistance of the outflow passage, and a controller configured to control the volume changing unit to reduce the volume of the liquid chamber so as to cause the liquid to be ejected through the nozzle. In filling the liquid chamber with the liquid for ejection of the liquid through the nozzle, the controller controls the passage resistance changing unit to change the passage resistance of the outflow passage to an increased passage resistance and controls the volume changing unit to increase the volume of the liquid chamber.

公开(公告)号：US20210229434A1

公开(公告)日：2021-07-29

申请号：US17153000

申请日：2021-01-20

Applicant: SEIKO EPSON CORPORATION

Inventor： Toshiro MURAYAMA ,  Takahiro KATAKURA ,  Nobuaki ITO

IPC: B41J2/045

Abstract: A liquid discharge method of discharging a liquid from a nozzle of a liquid discharge head by applying a drive pulse to a drive element of the liquid discharge head includes an acquisition step of acquiring a discharge characteristic of the liquid from the liquid discharge head, as a recording condition, and a driving step of applying the drive pulse to the drive element. The recording condition includes any of an angle of a discharge direction of the liquid discharged from the nozzle with respect to a reference direction, a drive frequency of the drive element, and an aspect ratio of distribution of the liquid discharged from the nozzle. In the liquid discharge method, in the driving step, the drive pulse that varies depending on the recording condition acquired in the acquisition step is applied to the drive element.

公开(公告)号：US20180281443A1

公开(公告)日：2018-10-04

申请号：US15913066

申请日：2018-03-06

Applicant: Seiko Epson Corporation

Inventor： Hirofumi SAKAI ,  Shinichi NAKAMURA ,  Junichi SANO ,  Takahiro KATAKURA ,  Keigo SUGAI

IPC: B41J2/175 ,  B41J2/18

CPC classification number: B41J2/17596 ,  B41J2/175 ,  B41J2/18

Abstract: A liquid discharge apparatus includes a liquid chamber communicating with a nozzle that discharges liquid; a capacity changer that changes a capacity of the chamber; an inflow path connected to the chamber allowing the liquid to enter the chamber; an outflow path connected to the liquid chamber allowing the liquid to exit the chamber; a first resistance changer changing a flow resistance of the inflow path; a second resistance changer changing a flow resistance of the outflow path; and a controller controlling the capacity changer, the first resistance changer, and the second resistance changer. The controller allows the nozzle to discharge the liquid by increasing the flow resistance of the inflow and outflow paths, increasing the capacity of the chamber, and then, while the flow resistance of the inflow and outflow paths remain increased, decreasing the capacity of the chamber.

公开(公告)号：US20180281409A1

公开(公告)日：2018-10-04

申请号：US15919595

申请日：2018-03-13

Applicant: Seiko Epson Corporation

Inventor： Keigo SUGAI ,  Takahiro KATAKURA ,  Hirofumi SAKAI ,  Shinichi NAKAMURA ,  Junichi SANO

IPC: B41J2/14 ,  B41J2/045 ,  H01L41/09

CPC classification number: B41J2/14233 ,  B41J2/045 ,  B41J2202/05 ,  B41J2202/12 ,  H01L41/0973

Abstract: A liquid ejecting apparatus including; a first liquid chamber that communicates with a first nozzle, a first channel, and a first outflow channel; a second liquid chamber that communicates with a second nozzle, a second channel, and a second outflow channel; a first volume changing portion that changes a volume of the first liquid chamber to eject liquid from the first nozzle; a second volume changing portion that changes a volume of the second liquid chamber to eject the liquid from the second nozzle; a first inflow channel resistance changing portion that changes a flow channel resistance of the first inflow channel, a second inflow channel resistance changing portion that changes a flow channel resistance of the second inflow channel, and an inflow channel-side common drive portion that applies drive forces to the first inflow channel resistance changing portion and the second inflow channel resistance changing portion.

公开(公告)号：US20180086094A1

公开(公告)日：2018-03-29

申请号：US15704311

申请日：2017-09-14

Applicant: Seiko Epson Corporation

Inventor： Hirofumi SAKAI ,  Keigo SUGAI ,  Takahiro KATAKURA ,  Junichi SANO ,  Shinichi NAKAMURA

IPC: B41J2/175

CPC classification number: B41J2/17596 ,  B05C5/0225 ,  B41J2/01 ,  B41J2/04588 ,  B41J2202/05

Abstract: A fluid discharging apparatus includes a storage chamber storing a fluid, a discharge port communicating with the storage chamber, a supply unit supplying the fluid to the storage chamber by pressure, a moving object moving in a first direction toward the discharge port and in a second direction away from the discharge port, a pressure changing mechanism, and a control unit controlling the moving object and the pressure changing mechanism. The control unit performs discharge processing, moving processing, and pressure control processing. In the discharge processing, the moving object moves from a closed position closing the discharge port in the first direction to discharge the fluid. In the moving processing, the moving object moves in the second direction while the fluid is discharged from the discharge port. In the pressure control processing, the pressure changing mechanism suppresses a pressure increase in storage chamber.

公开(公告)号：US20180085777A1

公开(公告)日：2018-03-29

申请号：US15703196

申请日：2017-09-13

Applicant: Seiko Epson Corporation

Inventor： Hirofumi SAKAI ,  Keigo SUGAI ,  Takahiro KATAKURA ,  Junichi SANO ,  Shinichi NAKAMURA

IPC: B05C11/10 ,  B41J2/14 ,  B41J2/175 ,  B41J2/03

CPC classification number: B05C11/1034 ,  B05C5/0225 ,  B29C64/112 ,  B29C64/209 ,  B33Y40/00 ,  B41J2/03 ,  B41J2/14 ,  B41J2/14032 ,  B41J2/175 ,  B41J2/17503 ,  B41J2/17556 ,  B41J2/17596 ,  B41J2202/05

Abstract: A fluid discharge apparatus includes a storage chamber, a pressure chamber, a moving body, and a pressure changing mechanism. The storage chamber stores a fluid. The pressure chamber is in communication with the storage chamber through a communication opening, and includes a discharge port to discharge the fluid. The moving body moves inside the storage chamber toward the communication opening, raises a pressure of the fluid in the pressure chamber, and discharges the fluid through the discharge port. The pressure changing mechanism is provided so as to face the pressure chamber, and changes a pressure of the pressure chamber. The pressure changing mechanism actuates in a direction to reduce the pressure chamber pressure after the moving body has started to move toward the communication opening.