公开(公告)号：US20230373210A1

公开(公告)日：2023-11-23

申请号：US18321206

申请日：2023-05-22

Applicant: SEIKO EPSON CORPORATION

Inventor： Yu HASEGAWA ,  Hiroaki OKUI ,  Eiichiro WATANABE ,  Yuma FUKUZAWA

IPC: B41J2/14

CPC classification number: B41J2/14 ,  B41J2202/08 ,  B41J2202/13 ,  B41J2002/14491

Abstract: A liquid ejecting head includes an introduction portion for introducing a gas supplied, a discharge portion for discharging the gas, and drive circuits provided in each of head chips, in which the drive circuits include a first drive circuit for driving the first head chip and a second drive circuit for driving the second head chip, a gas path through which the gas flows from the introduction portion to the discharge portion includes a first path coupled to the introduction portion, a second path coupled to the discharge portion, a first branch path coupling the first path and the second path, and a second branch path coupling the first path and the second path so as not to pass through the first branch path, the first drive circuit is disposed in the first branch path, and the second drive circuit is disposed in the second branch path.

公开(公告)号：US20230391092A1

公开(公告)日：2023-12-07

申请号：US18328131

申请日：2023-06-02

Applicant: SEIKO EPSON CORPORATION

Inventor： Yu HASEGAWA ,  Eiichiro WATANABE ,  Masami OTA ,  Hiroaki OKUI

IPC: B41J2/175

CPC classification number: B41J2/175

Abstract: A liquid ejecting apparatus includes a liquid ejection head, a supply tank, a recovery tank, a supply flow path, a recovery flow path, a pressurizing mechanism pressurizing the inside of the supply tank, and a depressurizing mechanism depressurizing the inside of the recovery tank. A filling period, in which a filling process is performed to fill, with the liquid, a nozzle, the supply flow path, and the recovery flow path, includes a period that is after a meniscus is formed in the nozzle and before the liquid reaches the recovery flow path. In the period, the pressurizing and the depressurizing mechanisms are driven; and in the period, Pt_out>−|Pm| is satisfied, where Pm indicates a pressure at which the meniscus is broken and Pt_out indicates a pressure in the recovery tank.

公开(公告)号：US20230347645A1

公开(公告)日：2023-11-02

申请号：US18308055

申请日：2023-04-27

Applicant: SEIKO EPSON CORPORATION

Inventor： Eiichiro WATANABE ,  Hiroaki OKUI ,  Yu HASEGAWA

IPC: B41J2/045

CPC classification number: B41J2/04588 ,  B41J2/04581

Abstract: A liquid ejecting apparatus includes a liquid ejection head, a circulation control section that controls a circulation operation of circulating the liquid in the first individual flow path, and a minute vibration control section that supplies a drive signal having a first waveform to the first piezoelectric element so as to control a minute vibration operation of causing the liquid in the first nozzle to vibrate to such a degree that the liquid is not ejected from the first nozzle. The circulation control section starts the circulation operation at a first time, and the minute vibration control section starts the minute vibration operation at a second time earlier than the first time.

公开(公告)号：US20230347641A1

公开(公告)日：2023-11-02

申请号：US18308080

申请日：2023-04-27

Applicant: SEIKO EPSON CORPORATION

Inventor： Eiichiro WATANABE ,  Hiroaki OKUI ,  Yu HASEGAWA

IPC: B41J2/045 ,  B41J2/165

CPC classification number: B41J2/04551 ,  B41J2/16505 ,  B41J2/04581 ,  B41J2002/14338

Abstract: A liquid ejecting apparatus includes a liquid ejection head, a circulation control section that controls a circulation operation of circulating the liquid in the first individual flow path, and a minute vibration control section that supplies a drive signal having a first waveform to the first piezoelectric element so as to control a minute vibration operation of causing the liquid in the first nozzle to vibrate to such a degree that the liquid is not ejected from the first nozzle. The circulation control section starts the circulation operation at a first time, and the minute vibration control section starts the minute vibration operation at a second time later than the first time.