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公开(公告)号：US20250033355A1
公开(公告)日：2025-01-30
申请号：US18787061
申请日：2024-07-29
Applicant: SEIKO EPSON CORPORATION
Inventor： Masaki MORI , Hitoshi TAKAAI
Abstract: A liquid ejecting head includes a detection resistor disposed on a lower side of the piezoelectric bodies in a direction of lamination and at a position not overlapping the individual electrodes, formed from the same material as that of the individual electrodes and the common electrode, and configured to change its resistance value in response to a temperature of the liquid inside the pressure chambers. The detection resistor includes an overlapping region overlapping the common electrode and a non-overlapping region not overlapping the common electrode at a cross-section where the pressure chamber substrate is sectioned at a position where the pressure chamber is present on a plane parallel to a longitudinal direction of the pressure chambers and the direction of lamination.
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公开(公告)号：US20160031214A1
公开(公告)日：2016-02-04
申请号：US14817397
申请日：2015-08-04
Applicant: SEIKO EPSON CORPORATION
Inventor： Hiroaki OKUI , Takayuki SHIMOSAKA , Naoya SATO , Hitoshi TAKAAI
IPC: B41J2/14
CPC classification number: B41J2/14 , B41J2/14233 , B41J2/2146 , B41J2002/14362 , B41J2002/14419 , B41J2002/14491 , B41J2202/20
Abstract: A liquid ejecting head includes driving elements and electrodes each extending a second direction for ejecting liquid of pressure chambers through nozzles. The driving elements are classified into a first element group and a second element group. The electrodes are arranged along a first direction intersecting the second direction and are classified into a first electrode group electrically connected to the first element group, a second electrode group electrically connected to the second element group and a third electrode group not contribute to the ejecting liquid.
Abstract translation: 液体喷射头包括各自延伸第二方向的驱动元件和电极，用于通过喷嘴喷射压力室的液体。 驱动元件分为第一元件组和第二元件组。 电极沿着与第二方向相交的第一方向排列，分为与第一元件组电连接的第一电极组，与第二元件组电连接的第二电极组和不对喷射液体有贡献的第三电极组 。
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公开(公告)号：US20140362142A1
公开(公告)日：2014-12-11
申请号：US14300009
申请日：2014-06-09
Applicant: SEIKO EPSON CORPORATION
Inventor： Hitoshi TAKAAI , Yuma FUKUZAWA , Yoichi NAGANUMA
IPC: B41J2/14
CPC classification number: B41J2/14201 , B41J2/14233 , B41J2/161 , B41J2/1623 , B41J2/1629 , B41J2/1635 , B41J2002/14241 , B41J2002/14306 , B41J2002/14419 , B41J2202/11
Abstract: A liquid ejecting head includes a pressure chamber substrate formed of silicon where a pressure chamber is formed, and a communication plate penetrated by communication holes in a plate thickness direction, in which the pressure chamber partitioned by partition walls formed of crystal orientation planes being formed in the recording head through etching. Acute angle portions are formed, by the partition walls intersecting with each other at an acute angle, in both end portions of the pressure chamber in a first direction, and a first step is disposed in the middle of each of the acute angle portions in an etching direction. Parts of the communication holes are arranged at positions superimposed on the acute angle portions in a bonding surface and remaining parts of the communication holes are arranged on outer sides in the first direction with respect to the acute angle portions such that a second step is formed in a communication portion between the pressure chamber and the communication holes.
Abstract translation: 液体喷射头包括由形成有压力室的硅形成的压力室基板和在板厚方向上穿过连通孔的连通板，其中由形成有晶体取向面的隔壁形成的压力室形成在 记录头通过蚀刻。 在第一方向上，在压力室的两个端部中，以锐角彼此相交的分隔壁形成急倾斜角部分，并且第一台阶设置在每个锐角部分的中间 蚀刻方向。 连通孔的一部分布置在接合表面上叠加在锐角部分上的位置处，并且连通孔的剩余部分相对于锐角部分布置在第一方向上的外侧，使得第二台阶形成在 压力室和连通孔之间的连通部分。
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公开(公告)号：US20200094553A1
公开(公告)日：2020-03-26
申请号：US16574683
申请日：2019-09-18
Applicant: SEIKO EPSON CORPORATION
Inventor： Takanori AIMONO , Masao NAKAYAMA , Motoki TAKABE , Hitoshi TAKAAI
IPC: B41J2/14
Abstract: A liquid ejecting head including a plurality of pressure chambers in communication with nozzles that eject a liquid, a diaphragm that includes layers including a first layer and a second layer and that constitutes wall surfaces of the plurality of pressure chambers, a plurality of piezoelectric elements formed on a first region of the diaphragm, the piezoelectric elements each being formed to correspond to a corresponding one of the pressure chambers, and a barrier layer that is in contact with an interface between the first layer and the second layer in a second region of the diaphragm, the second region surrounding the first region.
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公开(公告)号：US20200070516A1
公开(公告)日：2020-03-05
申请号：US16549228
申请日：2019-08-23
Applicant: SEIKO EPSON CORPORATION
Inventor： Sosuke YAMASAKI , Hitoshi TAKAAI , Yuma FUKUZAWA , Yoshinobu TOYAMA
Abstract: A liquid ejecting head that includes a first piezoelectric element and a second piezoelectric element, a first wire that extends in a first direction and that electrically couples the first piezoelectric element and a wiring substrate to each other, and a second wire that is adjacent to the first wire in a second direction intersecting the first direction and that extends in the first direction, the second wire electrically coupling the second piezoelectric element and the wiring substrate to each other. A first protrusion is formed on a surface of the first wire in a mounting area to where the wiring substrate is joined, and a second protrusion is formed on a surface of the second wire in the mounting area and at a position different from that of the first protrusion in the first direction.
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Patent Agency Ranking
公开(公告)号：US20180086071A1
公开(公告)日：2018-03-29
申请号：US15686534
申请日：2017-08-25
Applicant: SEIKO EPSON CORPORATION
Inventor： Hitoshi TAKAAI , Yuma FUKUZAWA , Takuma HAYASHI , Daisuke MATSUMOTO , Kazuyuki KATAGIRI , Takayuki SHIMOSAKA
CPC classification number: B41J2/14201 , B41J2/04506 , B41J2/04551 , B41J2/04581 , B41J2/14233 , B41J2/145 , B41J2/1607 , B41J2/1623 , B41J2002/14241 , B41J2002/14419
Abstract: Provided is a method for manufacturing a liquid ejecting head which includes a plurality of chips, each of which includes a plurality of segments, each segment including a pressure generating chamber communicating with a nozzle opening through which liquid is discharged, a diaphragm which is a portion of the pressure generating chamber, and a pressure generating unit causing a pressure change in the pressure generating chamber through the diaphragm, the method including measuring natural frequencies of the plurality of segments included in each of the chips, classifying the chips into ranks using the maximum value of the natural frequencies of the chips as a reference, and manufacturing the liquid ejecting head which includes the chips selected based on the ranks.
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公开(公告)号：US20180043690A1
公开(公告)日：2018-02-15
申请号：US15660696
申请日：2017-07-26
Applicant: SEIKO EPSON CORPORATION
Inventor： Hitoshi TAKAAI , Shunsuke WATANABE , Shingo TOMIMATSU , Kohei YUWAKI
IPC: B41J2/165
CPC classification number: B41J2/16517 , B41J2/14233 , B41J2/16526 , B41J2/175 , B41J2002/14419 , B41J2002/16573 , B41J2202/11
Abstract: A liquid discharge apparatus includes a plurality of pressure chambers that generate a pressure for discharging a liquid, a plurality of nozzles that communicate individually with the pressure chambers and that discharge the liquid, a common liquid chamber that includes a plurality of supply openings and that has, at an end portion side in an arrangement direction of the supply openings, a region in which flow speed of the liquid flowing toward the supply openings is higher than in another region, and a controller that controls a maintenance by expelling the liquid from the nozzles. During the maintenance, the controller controls expelling the liquid from a first nozzle to a second nozzle that is one of nozzles located on the end portion side of the first nozzle in the arrangement direction of the supply openings, in an order of the first nozzle to the second nozzle.
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公开(公告)号：US20250033352A1
公开(公告)日：2025-01-30
申请号：US18783551
申请日：2024-07-25
Applicant: SEIKO EPSON CORPORATION
Inventor： Masaki MORI , Hitoshi TAKAAI
Abstract: A liquid ejecting head includes a first detection resistor designed to change its resistance value depending on a temperature of the liquid inside the pressure chambers in the first pressure chamber line, a second detection resistor designed to change its resistance value depending on a temperature of the liquid inside the pressure chambers in the second pressure chamber line, a wiring board, a first coupling terminal that couples one end of the first detection resistor and one end of the second detection resistor in common to the wiring board, and a second coupling terminal that couples another end of the first detection resistor and another end of the second detection resistor in common to the wiring board.
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公开(公告)号：US20240181776A1
公开(公告)日：2024-06-06
申请号：US18502180
申请日：2023-11-06
Applicant: SEIKO EPSON CORPORATION
Inventor： Yu SHIOZAWA , Motoki TAKABE , Hitoshi TAKAAI
IPC: B41J2/14
CPC classification number: B41J2/14201 , B41J2/14072
Abstract: A liquid ejecting head includes: a nozzle; a piezoelectric material; an upper electrode located over the piezoelectric material and electrically coupled to the piezoelectric material; a lower electrode located under the piezoelectric material and electrically coupled to the piezoelectric material; upper-electrode wiring located over the upper electrode and configured to electrically couple the upper electrode to an external power supply; lower-electrode wiring configured to electrically couple the lower electrode to the external power supply; a vibration plate located under the lower electrode and configured to vibrate when the piezoelectric material is driven; and a pressure chamber substrate having a pressure chamber in which vibration of the vibration plate applies pressure to liquid to eject liquid through the nozzle and a first absorption chamber configured to absorb vibration of liquid propagated from the pressure chamber, and the upper electrode and the upper-electrode wiring are present over the first absorption chamber.
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公开(公告)号：US20230166506A1
公开(公告)日：2023-06-01
申请号：US18059878
申请日：2022-11-29
Applicant: SEIKO EPSON CORPORATION
Inventor： Yu SHIOZAWA , Masaki MORI , Motoki TAKABE , Hitoshi TAKAAI , Eiju HIRAI
CPC classification number: B41J2/14233 , B41J2/04581 , B41J2002/14362 , B41J2002/14459 , B41J2002/14491
Abstract: A liquid discharge head includes an individual electrode that is individually provided for the plurality of pressure chambers, a common electrode that is commonly provided for the plurality of pressure chambers, 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 is electrically coupled to the individual electrode and the common electrode, and applies a voltage for driving 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 first layer that is provided on a surface opposite to a surface facing the pressure chamber substrate in the detection resistor, and has a lower thermal conductivity than the detection resistor.
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