公开(公告)号：US11919298B2

公开(公告)日：2024-03-05

申请号：US17488426

申请日：2021-09-29

Applicant: Seiko Epson Corporation

Inventor： Noritaka Ide ,  Kunio Tabata

IPC: B41J29/38 ,  B41J2/045 ,  H03K3/037 ,  H03K17/687

CPC classification number: B41J2/0455 ,  B41J2/04541 ,  B41J2/04548 ,  B41J2/04581 ,  B41J2/04588 ,  H03K3/037 ,  H03K17/6871

Abstract: A driving circuit includes an amplification circuit configured to output an amplified modulation signal and a level shift circuit. The level shift circuit includes a second gate driver that outputs a third gate signal and a fourth gate signal, a third transistor that operates based on the third gate signal, and a fourth transistor that operates based on the fourth gate signal. The second gate driver outputs the third gate signal for controlling the third transistor to be conductive and the fourth gate signal for controlling the fourth transistor to be nonconductive in a second period in which a driving signal is fixed in a second potential that is higher than a first potential and lower than a third potential and the fourth gate signal for controlling the fourth transistor to be nonconductive.

公开(公告)号：US09510851B2

公开(公告)日：2016-12-06

申请号：US13928942

申请日：2013-06-27

Applicant: SEIKO EPSON CORPORATION

Inventor： Takeshi Seto ,  Shinichi Miyazaki ,  Kunio Tabata

IPC: A61B17/3203

CPC classification number: A61B17/3203 ,  A61B17/32037 ,  A61B2017/00017 ,  Y10T137/85986

Abstract: A fluid jet device including a fluid chamber with variable capacity and a capacity varying section adapted to vary the capacity of the fluid chamber in response to supply of a drive signal. A drive waveform section making the capacity varying section operate so as to compress the capacity of the fluid chamber and a restoring drive waveform section making the capacity varying section operate to restore the capacity of the fluid chamber before compressing the capacity in a signal waveform. The drive signal supply section controls supply content of the drive signal to provide a restoring period adapted to restore a steady state of the fluid flowing toward an inside of the fluid chamber in a period from when the compressing drive waveform section in the drive signal is supplied to when a subsequent compressing drive waveform section is supplied.

公开(公告)号：US09112433B2

公开(公告)日：2015-08-18

申请号：US13633187

申请日：2012-10-02

Applicant: SEIKO EPSON CORPORATION

Inventor： Noritaka Ide ,  Atsuya Hirabayashi ,  Kunio Tabata ,  Atsushi Oshima ,  Hiroyuki Yoshino

IPC: H01L41/09 ,  H02N2/18 ,  H01L41/113

CPC classification number: H02N2/181 ,  H01L41/1136

Abstract: A power generation unit includes a deforming member adapted to deform while switching a deformation direction, a piezoelectric device provided to the deforming member, a displacement detection section adapted to detect that the deforming member is displaced beyond a predetermined level, an inductor electrically connected to the piezoelectric device, a switch disposed between the piezoelectric device and the inductor, and a control section adapted to set the piezoelectric device and the inductor to an electrically conductive state via the switch if the displacement detection section detects that the deforming member is displaced beyond the predetermined level.

Abstract translation: 发电单元包括适于在变形方向切换的同时变形的变形构件，设置在变形构件上的压电装置，适于检测变形构件位移超过预定水平的位移检测部，电连接到 压电装置，设置在压电装置和电感器之间的开关，以及控制部，其适于将压电装置和电感器经由开关设置为导电状态，如果位移检测部检测到变形部件移动超过预定的 水平。

公开(公告)号：US09088270B2

公开(公告)日：2015-07-21

申请号：US14282789

申请日：2014-05-20

Applicant: SEIKO EPSON CORPORATION

Inventor： Kunio Tabata ,  Atsushi Oshima ,  Hiroyuki Yoshino ,  Noritaka Ide

IPC: H03K3/012 ,  H02M3/156 ,  B41J2/045 ,  H02M3/157

CPC classification number: H03K3/012 ,  B41J2/04541 ,  B41J2/04581 ,  H02M3/156 ,  H02M3/157

Abstract: Operation of a digital power amplifier for power amplification of a modulated signal is stopped in a period in which a voltage value of a drive signal applied to a capacitive load is constant, to thereby suppress power loss. The power amplification is stopped either when half a period of time when the modulated signal in a first voltage state maintains the first voltage state elapses or when half a period of time when the modulated signal in a second voltage state which is lower in voltage than the first voltage state maintains the second voltage state elapses. Accordingly, when electric current does not flow in a inductor of a low pass filter, it is possible to stop the power amplification. Thus, it is possible to prevent generation of voltage fluctuation in the drive signal due to an electromotive force caused by a self-induction phenomenon of the inductor.

Abstract translation: 在施加到电容性负载的驱动信号的电压值恒定的时段内停止用于调制信号的功率放大的数字功率放大器的操作，从而抑制功率损耗。 当第一电压状态下的调制信号保持第一电压状态或当电压低于第二电压状态的第二电压状态的调制信号的半个时间段的半个时间段停止功率放大， 第一电压状态保持第二电压状态已经过去。 因此，当电流不在低通滤波器的电感器中流动时，可以停止功率放大。 因此，可以防止由电感器的自感现象引起的电动势引起的驱动信号中的电压波动的产生。

公开(公告)号：US09073076B2

公开(公告)日：2015-07-07

申请号：US14282847

申请日：2014-05-20

Applicant: SEIKO EPSON CORPORATION

Inventor： Atsushi Oshima ,  Kunio Tabata ,  Noritaka Ide ,  Hiroyuki Yoshino

IPC: B41J29/38 ,  B05B12/02 ,  B41J2/045 ,  B41J2/175 ,  A61J3/07

CPC classification number: B05B12/02 ,  A61J3/07 ,  B41J2/04541 ,  B41J2/04548 ,  B41J2/04581 ,  B41J2/17503

Abstract: A liquid ejection device, includes: a drive waveform signal output circuit which outputs a drive waveform signal to serve as a reference for the drive signal; a modulator which pulse-modulates the drive waveform signal and thus generates a first modulated signal and a second modulated signal having a different phase from the first modulated signal within a range from greater than 90 degrees to smaller than 270 degrees; a first digital power amplifier; a second digital power amplifier a first low pass filter which performs low pass filtering of the first amplified digital signal and thus generates a first demodulated signal; and a second low pass filter which performs low pass filtering of the second amplified digital signal and thus generates a second demodulated signal; wherein the first demodulated signal and the second demodulated signal are combined and applied as the drive signal to the capacitive load.

Abstract translation: 一种液体喷射装置，包括：驱动波形信号输出电路，其输出用作驱动信号的基准的驱动波形信号; 调制器，其在大于90度至小于270度的范围内脉冲调制驱动波形信号，从而产生具有与第一调制信号不同相位的第一调制信号和第二调制信号; 第一个数字功率放大器; 第二数字功率放大器，对所述第一放大数字信号进行低通滤波并由此产生第一解调信号的第一低通滤波器; 以及第二低通滤波器，对第二放大数字信号进行低通滤波，从而产生第二解调信号; 其中第一解调信号和第二解调信号被组合并作为驱动信号施加到电容性负载。

公开(公告)号：US09006957B2

公开(公告)日：2015-04-14

申请号：US13633190

申请日：2012-10-02

Applicant: Seiko Epson Corporation

Inventor： Kunio Tabata ,  Atsuya Hirabayashi ,  Atsushi Oshima ,  Hiroyuki Yoshino ,  Noritaka Ide

IPC: H01L41/113 ,  H02N2/18

CPC classification number: H02N2/181 ,  H01L41/1136

Abstract: A power generation unit includes a deforming member (a beam) adapted to deform while switching a deformation direction, a first piezoelectric device provided to the deforming member (the beam), a second piezoelectric device provided to the deforming member (the beam), an inductor electrically connected to the first piezoelectric device, a switch disposed between the first piezoelectric device and the inductor, and a control section adapted to detect a voltage generated in the second piezoelectric device, and if the voltage detected has a level one of equal to and higher than a predetermined level, electrically connect the first piezoelectric device and the inductor to each other using the switch.

Abstract translation: 发电单元包括适于在切换变形方向时变形的变形构件（梁），设置到变形构件（梁）的第一压电装置，设置在变形构件（梁）上的第二压电装置， 电感器电连接到第一压电器件，设置在第一压电器件和电感器之间的开关，以及控制部分，其适于检测在第二压电器件中产生的电压，并且如果检测到的电压具有等于或等于 高于预定水平，使用开关将第一压电器件和电感器彼此电连接。

公开(公告)号：US08894170B2

公开(公告)日：2014-11-25

申请号：US14103704

申请日：2013-12-11

Applicant: Seiko Epson Corporation

Inventor： Kunio Tabata ,  Atsushi Oshima ,  Noritaka Ide ,  Shinichi Miyazaki ,  Hiroyuki Yoshino

IPC: B41J29/38 ,  B41J2/045

CPC classification number: B41J2/04588 ,  B41J2/0452 ,  B41J2/04541 ,  B41J2/04548 ,  B41J2/0457 ,  B41J2/04581 ,  B41J2/04593 ,  B41J2/04596

Abstract: A fluid ejection device includes: a modulator adapted to pulse-modulate a drive waveform signal forming a basis of a drive signal of an actuator to obtain a modulated signal; a digital power amplifier circuit adapted to power-amplify the modulated signal to obtain a power-amplified modulated signal; a low pass filter adapted to smooth the power-amplified modulated signal to obtain the drive signal; and a power amplification stopping section operating when holding a voltage of the actuator constant.

Abstract translation: 流体喷射装置包括：调制器，适于脉冲调制形成致动器的驱动信号的基础的驱动波形信号以获得调制信号; 数字功率放大器电路，适于对已调制信号进行功率放大以获得功率放大调制信号; 低通滤波器，用于平滑功率放大调制信号以获得驱动信号; 以及在保持致动器的电压恒定时工作的功率放大停止部。

公开(公告)号：US12269263B2

公开(公告)日：2025-04-08

申请号：US18187953

申请日：2023-03-22

Applicant: SEIKO EPSON CORPORATION

Inventor： Noritaka Ide ,  Kunio Tabata

IPC: B41J2/045

Abstract: A liquid discharge apparatus in which a level shift circuit executes, one or a plurality of times according to a voltage value of a capacitor included in a bootstrap circuit detected by a voltage detection circuit, a second control of outputting a third gate signal for controlling a third transistor to be non-conductive and a fourth gate signal for controlling a fourth transistor to be conductive, and then, outputting the third gate signal for controlling the third transistor to be conductive and the fourth gate signal for controlling the fourth transistor to be non-conductive.

公开(公告)号：US11904607B2

公开(公告)日：2024-02-20

申请号：US17537560

申请日：2021-11-30

Applicant: Seiko Epson Corporation

Inventor： Shoichiro Yokoo ,  Noritaka Ide ,  Kunio Tabata

IPC: B41J29/38 ,  B41J2/045

CPC classification number: B41J2/04541 ,  B41J2/04581

Abstract: An amplifier circuit, a level shift circuit; and a demodulation circuit, in which in a second mode obtained by shifting a reference potential of the amplification modulation signal to a second potential having a potential higher than a first potential, the second gate driver included in the level shift circuit performs a constant voltage control that outputs a third gate signal controlling a third transistor to be conductive and a fourth gate signal controlling a fourth transistor to be non-conductive, and a charge control that outputs the third gate signal controlling the third transistor to be non-conductive and the fourth gate signal controlling the fourth transistor to be conductive, and then outputs the third gate signal controlling the third transistor to be conductive and the fourth gate signal controlling the fourth transistor to be non-conductive.

公开(公告)号：US11840076B2

公开(公告)日：2023-12-12

申请号：US17537551

申请日：2021-11-30

Applicant: Seiko Epson Corporation

Inventor： Noritaka Ide ,  Kunio Tabata

IPC: B41J29/38 ,  B41J2/045

CPC classification number: B41J2/04541 ,  B41J2/0455 ,  B41J2/04581

Abstract: A level shift circuit that outputs a level shift amplification modulation signal obtained by shifting a potential of an amplification modulation signal output by an amplifier circuit is provided, a potential of a first voltage supplied to one end of a first transistor of the amplifier circuit is larger than a potential of a second voltage supplied to a bootstrap circuit which is a reference of a third voltage supplied to one end of a third transistor included in the level shift circuit, and a second gate driver included in the level shift circuit outputs a third gate signal that switches an operation of the third transistor and a fourth gate signal that switches an operation of a fourth transistor, in a period during which a potential of a drive signal is between the potential of the first voltage and the potential of the second voltage.