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公开(公告)号：US11458728B2
公开(公告)日：2022-10-04
申请号：US17036319
申请日：2020-09-29
Applicant: SEIKO EPSON CORPORATION
Inventor： Hiromu Miyazawa , Kinya Ozawa , Jiro Kato
Abstract: In a method of controlling a liquid ejecting apparatus, where the liquid ejecting apparatus includes a pressure chamber that communicates with a nozzle that ejects a liquid, a drive element that changes a pressure of the liquid in the pressure chamber, and a drive circuit that supplies the drive element with an ejection pulse that generates a change in the pressure that ejects the liquid from the nozzle, the method includes specifying a viscosity of the liquid in the nozzle and a surface tension of the liquid in the nozzle from a residual vibration when the pressure of the liquid in the pressure chamber is changed, and controlling a waveform of the ejection pulse according to the viscosity and the surface tension.
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公开(公告)号：US10603009B2
公开(公告)日：2020-03-31
申请号：US15167920
申请日：2016-05-27
Applicant: SEIKO EPSON CORPORATION
Inventor： Hiromu Miyazawa , Masayoshi Yamada , Hiroshi Ito , Tomoaki Nakamura , Hiroshi Matsuda , Jiro Tsuruno
IPC: B06B1/06 , A61B8/00 , H01L41/047
Abstract: A piezoelectric device includes a piezoelectric film having a first surface in contact with a vibrating film and a second surface on the opposite side to the first surface, first and second electrodes that are provided on the second surface of the piezoelectric film and that are disposed at positions away from each other and are short-circuited to each other at a position away from the piezoelectric film, and a third electrode that is provided between the first and second electrodes on the second surface of the piezoelectric film and is disposed at a position away from the first and second electrodes. At least parts of the contours of end portions of the first and second electrodes are defined in parallel to side portions of the third electrode.
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公开(公告)号：US09272507B2
公开(公告)日：2016-03-01
申请号：US14268805
申请日：2014-05-02
Applicant: SEIKO EPSON CORPORATION
Inventor： Hiromu Miyazawa , Hiroshi Ito , Jiro Kato , Eiju Hirai , Toshihiro Shimizu
CPC classification number: B41J2/045 , B41J2/055 , B41J2/14233 , B41J2002/14241 , B41J2002/14419 , B41J2002/14491
Abstract: A liquid ejecting head includes a flow channel forming substrate having pressure generation chambers communicating with a nozzle opening and arranged in parallel along a lateral direction. A piezoelectric element is provided on one surface of the flow channel forming substrate in correspondence to the pressure generation chamber, and has a first electrode, a piezoelectric layer provided on the first electrode and a second electrode provided on the piezoelectric layer. In a direction intersecting with the arrangement direction of the pressure generation chambers, in boundaries between an active section that is a substantial driving section and an inactive section that is not a substantial driving section of the piezoelectric layer, the first electrode includes a taper section of which a width is gradually decreased toward the boundary from the active section side.
Abstract translation: 液体喷射头包括具有压力产生室的流路形成基板，该压力产生室与喷嘴开口连通并且沿着横向方向平行布置。 压电元件设置在对应于压力产生室的流道形成基板的一个表面上，并且具有第一电极，设置在第一电极上的压电层和设置在压电层上的第二电极。 在与压力产生室的排列方向相交的方向上，在作为实质的驱动部分的有效部分和不是压电层的实质驱动部分的非活动部分之间的边界中，第一电极包括锥形部分 宽度从有效部分侧朝向边界逐渐减小。
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公开(公告)号：US09147829B2
公开(公告)日：2015-09-29
申请号：US14078447
申请日：2013-11-12
Applicant: Seiko Epson Corporation
Inventor： Takayuki Yonemura , Hiromu Miyazawa
CPC classification number: H01L41/183 , B41J2/045 , B41J2/055 , B41J2/14233 , B41J2/161 , B41J2/1623 , B41J2/1629 , B41J2/1634 , B41J2/1645 , B41J2/1646 , B41J2002/14241 , B41J2002/14419 , B41J2202/03 , H01L41/0973 , H01L41/18 , H01L41/1878
Abstract: A liquid ejection head, comprises a pressure generation chamber communicating with a nozzle opening and a piezoelectric element having a piezoelectric layer and an electrodes. The piezoelectric layer is a perovskite type complex oxide containing bismuth, iron, and cerium. The piezoelectric layer contains the cerium in a proportion of 0.01 molar ratio or more and 0.13 molar ratio or lower based on the total amount of the bismuth and the cerium.
Abstract translation: 液体喷射头包括与喷嘴开口连通的压力产生室和具有压电层和电极的压电元件。 压电层是含有铋，铁和铈的钙钛矿型复合氧化物。 所述压电体层的含有比例为0.01摩尔％以上且0.13摩尔％以下的铈，相对于铋和铈的总量，
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公开(公告)号：US11565523B2
公开(公告)日：2023-01-31
申请号：US17465897
申请日：2021-09-03
Applicant: Seiko Epson Corporation
Inventor： Hiromu Miyazawa , Toshihiro Shimizu
Abstract: A liquid ejecting apparatus is provided comprising: a liquid ejecting head; and a controller. The liquid ejecting head including: a nozzle from which a liquid is ejected; a first communication passage that is in communication with the first nozzle; a first pressure compartment; a first drive element that changes a pressure of the first pressure compartment; a first passage that connects the first pressure compartment and the first communication passage; a second pressure compartment; a second drive element that changes a pressure of the second pressure compartment; a second passage that connects the second pressure compartment and the first communication passage. The controller performs a first mode and a second mode, the first mode being a mode in which liquid flows from the first pressure compartment through the first communication passage to the nozzle, and liquid flows the second pressure compartment through the second communication passage to the nozzle, and, the second mode being a mode in which liquid flows from the first pressure compartment through the first communication passage to the nozzle, and liquid flows from the nozzle through the second communication passage to the second pressure compartment.
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Patent Agency Ranking
公开(公告)号：US11437565B2
公开(公告)日：2022-09-06
申请号：US16114286
申请日：2018-08-28
Applicant: Seiko Epson Corporation
Inventor： Masayuki Omoto , Ichiro Asaoka , Hiromu Miyazawa
IPC: B41J2/14 , H01L41/187 , H01L41/08 , H01L41/318 , H01L41/09
Abstract: A piezoelectric element including an electrode and a piezoelectric layer provided on the electrode and having a perovskite structure including lead, zirconium, and titanium is provided. A radial distribution function obtained from an extended X-ray absorption fine structure of an L3 absorption edge of lead in an X-ray absorption spectrum of the piezoelectric layer at an interface with the electrode satisfies a formula (1) below A/B≤1 (1) (in the formula (1), A represents an intensity of a peak attributable to oxygen atoms closest to lead atoms; and B represents an intensity of a peak attributable to oxygen atoms second closest to the lead atoms).
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公开(公告)号：US11419579B2
公开(公告)日：2022-08-23
申请号：US16152564
申请日：2018-10-05
Applicant: SEIKO EPSON CORPORATION
Inventor： Masayoshi Yamada , Hiroshi Matsuda , Tomoaki Nakamura , Hiroshi Ito , Hiromu Miyazawa
Abstract: An ultrasonic sensor includes a vibration plate, a first electrode, a piezoelectric body, and a second electrode. The first electrode is laminated on the vibration plate, that has a length along a surface of the vibration plate in a first direction, and that has a width Wbe along the surface of the vibration plate in a second direction that is orthogonal to the first direction. The width Wbe is not more than the length. The piezoelectric body is laminated on the first electrode and has a width Wpz in the second direction. The second electrode is laminated on the piezoelectric body. A ratio Wbe/Wpz between the width Wbe of the first electrode and the width Wpz of the piezoelectric body is not less than 0.1 and not more than 0.8.
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公开(公告)号：US10458957B2
公开(公告)日：2019-10-29
申请号：US15681883
申请日：2017-08-21
Applicant: Seiko Epson Corporation
Inventor： Hiromu Miyazawa , Hiroshi Ito , Tomoaki Nakamura , Masayoshi Yamada , Kanechika Kiyose , Tsukasa Funasaka
Abstract: An ultrasonic device includes: a substrate provided with a first opening and a second opening; a support film that is provided on the substrate and closes the first opening and the second opening; a transmitting piezoelectric film that is provided on the support film at a position which overlaps the first opening when viewed in a thickness direction of the substrate and that is sandwiched between a pair of electrodes in the thickness direction of the substrate; and a receiving piezoelectric film that is provided on the support film at a position which overlaps the second opening when viewed in the thickness direction of the substrate and that is sandwiched between a pair of electrodes in an intersecting direction intersecting with the thickness direction of the substrate.
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公开(公告)号：US10363574B2
公开(公告)日：2019-07-30
申请号：US15283367
申请日：2016-10-01
Applicant: SEIKO EPSON CORPORATION
Inventor： Hiromu Miyazawa , Hiroshi Ito , Tomoaki Nakamura , Masayoshi Yamada , Jiro Tsuruno , Tsukasa Funasaka
IPC: H01L41/09 , H01L41/047 , B06B1/06 , A61B8/00 , G01N29/24
Abstract: A piezoelectric element which includes a vibrating film, a piezoelectric body disposed on one surface of the vibrating film, and a horizontal electrode structure in which electrodes are disposed at a predetermined gap therebetween on the piezoelectric body. The vibrating film includes a recess portion in a portion corresponding to the predetermined gap in plan view.
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20.发明授权公开(公告)号：US10086405B2
公开(公告)日：2018-10-02
申请号：US14669123
申请日：2015-03-26
Applicant: SEIKO EPSON CORPORATION
Inventor： Jiro Tsuruno , Tsukasa Funasaka , Tomoaki Nakamura , Hiromu Miyazawa , Hiroshi Ito , Masayoshi Yamada
Abstract: A piezoelectric element includes a vibrating film, a piezoelectric body, a first electrode, a second electrode, and a groove. The piezoelectric body is arranged upon the vibrating film. The first electrode is arranged upon the piezoelectric body. The second electrode is arranged upon the piezoelectric body and at a position that is separated from the first electrode. The groove is located between the first electrode and the second electrode and splits a surface of the piezoelectric body in two, as seen in plan view from a thickness direction of the vibrating film.
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