公开(公告)号：US08773098B2

公开(公告)日：2014-07-08

申请号：US13420679

申请日：2012-03-15

申请人： Kunio Tabata ,  Atsushi Oshima ,  Hiroyuki Yoshino ,  Noritaka Ide

发明人： Kunio Tabata ,  Atsushi Oshima ,  Hiroyuki Yoshino ,  Noritaka Ide

IPC分类号： H02M3/156

CPC分类号： H03K3/012 ,  B41J2/04541 ,  B41J2/04581 ,  H02M3/156 ,  H02M3/157

摘要： 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.

摘要翻译： 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：US08757749B2

公开(公告)日：2014-06-24

申请号：US13351770

申请日：2012-01-17

申请人： Atsushi Oshima ,  Kunio Tabata ,  Noritaka Ide ,  Hiroyuki Yoshino

发明人： Atsushi Oshima ,  Kunio Tabata ,  Noritaka Ide ,  Hiroyuki Yoshino

IPC分类号： B41J29/38 ,  B41J2/045

CPC分类号： B05B12/02 ,  A61J3/07 ,  B41J2/04541 ,  B41J2/04548 ,  B41J2/04581 ,  B41J2/17503

摘要： 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.

摘要翻译： 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：US08733873B2

公开(公告)日：2014-05-27

申请号：US13555740

申请日：2012-07-23

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

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

IPC分类号： B41J29/38

CPC分类号： A61B17/3203 ,  B41J2/04541 ,  B41J2/04548 ,  B41J2/0455 ,  B41J2/0457 ,  B41J2/04573 ,  B41J2/04581 ,  B41J2/04593 ,  B41J29/38

摘要： A liquid ejection device includes: a drive waveform generator generating a drive waveform signal; a modulator performing pulse modulation on a signal from the drive waveform generator to provide a modulated signal; a digital power amplifier performing power amplification on the modulated signal to provide an amplified digital signal; a Lowpass Filter smoothing the amplified digital signal to provide a drive signal of an actuator; a compensator advancing the phase of the drive signal to provide a negative feedback signal; and a subtractor providing a differential signal between the drive waveform signal and the negative feedback signal as an input signal to the modulator.

摘要翻译： 液体喷射装置包括：产生驱动波形信号的驱动波形发生器; 对来自驱动波形发生器的信号执行脉冲调制以提供调制信号的调制器; 数字功率放大器，对调制信号进行功率放大，以提供放大的数字信号; 低通滤波器平滑放大的数字信号以提供致动器的驱动信号; 补偿器推进驱动信号的相位以提供负反馈信号; 以及在驱动波形信号和负反馈信号之间提供差分信号作为到调制器的输入信号的减法器。

公开(公告)号：US08419147B2

公开(公告)日：2013-04-16

申请号：US12605480

申请日：2009-10-26

申请人： Noritaka Ide ,  Kunio Tabata ,  Shinichi Miyazaki ,  Atsushi Oshima ,  Hiroyuki Yoshino ,  Nobuaki Azami

发明人： Noritaka Ide ,  Kunio Tabata ,  Shinichi Miyazaki ,  Atsushi Oshima ,  Hiroyuki Yoshino ,  Nobuaki Azami

IPC分类号： B41J29/38 ,  B41J2/045

CPC分类号： B41J2/0459 ,  B41J2/04548 ,  B41J2/04573 ,  B41J2/04581 ,  B41J2/04588

摘要： A fluid ejection device that ejects fluid from an ejection port includes: a drive element that ejects fluid in accordance with a difference between voltages applied to a first terminal and a second terminal; a drive voltage waveform storing unit that stores a drive voltage waveform applied to the drive element; a plurality of power supplies each having a different voltage; and a drive voltage waveform applying unit that applies the drive voltage waveform to the drive element by switching among the plurality of power supplies connected to the first and second terminals of the drive element.

摘要翻译： 从喷射口喷出流体的流体喷射装置包括：驱动元件，其根据施加到第一端子和第二端子的电压之间的差异喷射流体; 驱动电压波形存储单元，其存储施加到驱动元件的驱动电压波形; 多个电源，每个电源具有不同的电压; 以及驱动电压波形施加单元，其通过在连接到驱动元件的第一和第二端子的多个电源之间切换来向驱动元件施加驱动电压波形。

公开(公告)号：US08398194B2

公开(公告)日：2013-03-19

申请号：US12623625

申请日：2009-11-23

申请人： Hiroyuki Yoshino ,  Atsushi Oshima ,  Noritaka Ide ,  Kunio Tabata ,  Nobuaki Azami ,  Shinichi Miyazaki

发明人： Hiroyuki Yoshino ,  Atsushi Oshima ,  Noritaka Ide ,  Kunio Tabata ,  Nobuaki Azami ,  Shinichi Miyazaki

IPC分类号： B41J29/38 ,  B41J2/015

CPC分类号： H03F3/217 ,  B41J2/04541 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/04593 ,  B41J2/04596 ,  H03F3/2171 ,  H03F3/2173

摘要： A power amplifier includes: a modulator pulse-modulating a drive waveform signal serving as a reference of a drive signal applied to an actuator and outputting a plurality of modulated signals; a digital power amplifier having a plurality of digital power amplifier stages each including a pair of push-pull switching elements, amplifying the power of the plurality of modulated signals, and outputting multi-value amplified digital signals; and a low pass filter smoothing the amplified digital signals and outputting the drive signal, wherein the modulator includes a control section switching one of a state where the same modulated signal is connected to two or more of the digital power amplifier stages and a state where different modulated signals are connected to different digital power amplifier stages to the other.

公开(公告)号：US08393699B2

公开(公告)日：2013-03-12

申请号：US12843140

申请日：2010-07-26

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

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

IPC分类号： B41J29/38 ,  B41J2/015

CPC分类号： H02M3/07 ,  B41J2/04541 ,  B41J2/04568 ,  B41J2/0457 ,  B41J2/04581 ,  Y10T307/724

摘要： A capacitive load driving circuit that drives an electrical load having a capacitive component, includes: a first power supply generating a first voltage; a second power supply generating a second voltage different from the first voltage; a plurality of charge storage elements charged by the first power supply; a first connection unit that connects the plurality of charge storage elements to the electrical load by switching connections among the charge storage elements; and a second connection unit that connects the second power supply to the electrical load.

摘要翻译： 一种用于驱动具有电容分量的电负载的电容性负载驱动电路，包括：产生第一电压的第一电源; 产生不同于所述第一电压的第二电压的第二电源; 由所述第一电源充电的多个电荷存储元件; 第一连接单元，通过切换电荷存储元件之间的连接来将多个电荷存储元件连接到电负载; 以及将所述第二电源连接到所述电负载的第二连接单元。

公开(公告)号：US08836199B2

公开(公告)日：2014-09-16

申请号：US13619796

申请日：2012-09-14

申请人： Noritaka Ide ,  Kunio Tabata ,  Atsushi Oshima ,  Hiroyuki Yoshino

发明人： Noritaka Ide ,  Kunio Tabata ,  Atsushi Oshima ,  Hiroyuki Yoshino

IPC分类号： H02N2/18 ,  H01L41/113

CPC分类号： H02N2/181 ,  H01L41/1136 ,  H02N2/188

摘要： A power generation unit includes a deforming member adapted to repeatedly deform a piezoelectric element, a pair of electrodes provided to the piezoelectric element, an inductor disposed between the pair of electrodes, and constituting a resonant circuit together with a capacitive component of the piezoelectric element, a first switch connected in series to the inductor, a member adapted to detect a timing at which a deformation direction of the deforming member is switched, a full bridge rectifier adapted to rectify a current output from the pair of electrodes, a capacitor connected to the full bridge rectifier, and adapted to store a current supplied from the full bridge rectifier, a second switch connected between either one of the pair of electrodes and the capacitor, and a control circuit adapted to operate the first switch and the second switch.

摘要翻译： 发电单元包括适于使压电元件反复变形的变形构件，设置在压电元件上的一对电极，设置在该对电极之间的电感器，并与压电元件的电容部件一起构成谐振电路， 与电感器串联连接的第一开关，适于检测变形构件的变形方向切换的定时的构件，适于整流来自该对电极的电流输出的全桥整流器，连接到电感器的电容器 全桥整流器，并且适于存储从全桥整流器提供的电流，连接在该对电极中的任一个与电容器之间的第二开关以及适于操作第一开关和第二开关的控制电路。

公开(公告)号：US08941289B2

公开(公告)日：2015-01-27

申请号：US13619729

申请日：2012-09-14

申请人： Atsuya Hirabayashi ,  Kunio Tabata ,  Atsushi Oshima ,  Hiroyuki Yoshino ,  Noritaka Ide ,  Yasuhiro Ono

发明人： Atsuya Hirabayashi ,  Kunio Tabata ,  Atsushi Oshima ,  Hiroyuki Yoshino ,  Noritaka Ide ,  Yasuhiro Ono

IPC分类号： H01L41/113 ,  H02N2/18

CPC分类号： H01L41/1136 ,  H02N2/181 ,  H02N2/188

摘要： A power generation unit includes: a deforming member adapted to deform while switching a deformation direction; a piezoelectric device provided to the deforming member, and having a pair of electrodes; a displacement sensor adapted to detect a deformation amount of the deforming member, and then output deformation amount information as information related to the deformation amount; an inductor electrically connected to the piezoelectric device; a switch disposed between the piezoelectric device and the inductor; and a switch control section adapted to control the switch so as to set the pair of electrodes to a shorted state for a predetermined period of time when the deformation amount exceeds a predetermined level.

摘要翻译： 发电单元包括：适于在切换变形方向时变形的变形构件; 设置在变形部件上的压电元件，具有一对电极; 位移传感器，适于检测变形构件的变形量，然后输出变形量信息作为与变形量有关的信息; 电感器，其电连接到所述压电器件; 设置在压电器件和电感器之间的开关; 以及开关控制部，其适于控制所述开关，以便在所述变形量超过预定水平时，将所述一对电极设定为短路状态达预定时间段。

公开(公告)号：US08939534B2

公开(公告)日：2015-01-27

申请号：US12905638

申请日：2010-10-15

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

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

IPC分类号： B41J29/38 ,  B41J2/045

CPC分类号： B41J2/04591 ,  B41J2/04553 ,  B41J2/0456 ,  B41J2/04581 ,  B41J2/0459

摘要： A liquid ejection apparatus which, by applying a drive voltage waveform to a piezoelectric element which drives an ejection nozzle, ejects a liquid from the ejection nozzle. The apparatus includes a reference voltage generating unit which generates a plurality of reference voltages, a drive voltage waveform data storage unit classifies the drive voltage waveform as either a voltage increasing section, decreasing section, or holding section, and stores drive voltage waveform data including a required time of a waveform section configuring the drive voltage waveform, and a voltage, selected from the plurality of reference voltages for the waveform section. The apparatus also includes a drive voltage waveform application unit which, in accordance with information relating to an adjustment of the ejection amount of the liquid ejected from the ejection nozzle, changes the required time included in the drive voltage waveform data, and applies the drive voltage waveform to the piezoelectric element.

摘要翻译： 一种液体喷射装置，其通过将驱动电压波形施加到驱动喷嘴的压电元件，从喷嘴喷出液体。 该装置包括产生多个参考电压的参考电压产生单元，驱动电压波形数据存储单元将驱动电压波形分类为升压部分，降压部分或保持部分，并存储驱动电压波形数据，其包括 配置驱动电压波形的波形部分的所需时间以及从波形部分的多个参考电压中选择的电压。 该装置还包括驱动电压波形施加单元，其根据与从喷射喷嘴喷射的液体的喷射量的调整相关的信息改变包括在驱动电压波形数据中的所需时间，并施加驱动电压 波形到压电元件。

公开(公告)号：US08693225B2

公开(公告)日：2014-04-08

申请号：US12605475

申请日：2009-10-26

申请人： Hiroyuki Yoshino ,  Nobuaki Azami ,  Shinichi Miyazaki ,  Kunio Tabata ,  Atsushi Oshima ,  Noritaka Ide

发明人： Hiroyuki Yoshino ,  Nobuaki Azami ,  Shinichi Miyazaki ,  Kunio Tabata ,  Atsushi Oshima ,  Noritaka Ide

IPC分类号： H02J1/10

CPC分类号： B41J2/14274 ,  B41J2/04541 ,  B41J2/04581 ,  B41J2/04588

摘要： An electric load driving circuit for driving an electric load having a capacity component includes a plurality of power sources generating different voltages, capacitors provided parallel to the plurality of power sources, a switch control unit that switches connections between the capacitors and the electric load and thereby switching a voltage applied to the electric load, discharge paths that enable discharging electric charge stored in the capacitor, and a discharge control unit that controls a quantity of electric charge discharged from the discharge paths.

摘要翻译： 用于驱动具有电容分量的电负载的电负载驱动电路包括产生不同电压的多个电源，与多个电源并联设置的电容器，切换电容器与电负载之间的连接的开关控制单元 切换施加到电负载的电压，能够放电存储在电容器中的电荷的放电路径;以及放电控制单元，其控制从放电路径排出的电荷量。