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：US08430466B2

公开(公告)日：2013-04-30

申请号：US12161148

申请日：2007-01-17

申请人： Kunio Tabata ,  Atsushi Oshima ,  Osamu Shinkawa ,  Toshiyuki Suzuki ,  Tomoki Hatano

发明人： Kunio Tabata ,  Atsushi Oshima ,  Osamu Shinkawa ,  Toshiyuki Suzuki ,  Tomoki Hatano

IPC分类号： B41J29/38 ,  B41J2/05

CPC分类号： B41J2/04596 ,  B41J2/04541 ,  B41J2/04548 ,  B41J2/04568 ,  B41J2/04578 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/04591 ,  B41J2/04595 ,  H01L41/042

摘要： A head drive apparatus of an inkjet printer includes nozzles and corresponding actuators that eject liquid drops. A drive unit applies a drive signal to the actuators. The drive unit includes a drive waveform generator that generates a drive waveform signal as a reference of a signal to control drive of the actuators. A modulator pulse modulates a drive waveform signal generated by the drive waveform generator. A digital power amplifier amplifies power of a modulated signal subjected to the pulse modulation. A low pass filter smoothes an amplified digital signal subjected to the power amplification by the digital power amplifier and supplying the signal as a drive signal to the actuators. An inverse filter provided in a subsequent stage of the drive waveform generator corrects at least the frequency characteristics of the filter to predetermined frequency characteristics, independently of the number of the actuators to drive.

摘要翻译： 喷墨打印机的头驱动装置包括喷嘴和喷射液滴的相应致动器。 驱动单元向驱动器施加驱动信号。 驱动单元包括驱动波形发生器，其产生用于控制致动器的驱动的信号的参考的驱动波形信号。 调制器脉冲调制由驱动波形发生器产生的驱动波形信号。 数字功率放大器放大经受脉冲调制的调制信号的功率。 低通滤波器对由数字功率放大器进行功率放大的放大数字信号进行平滑处理，并将信号作为驱动信号提供给致动器。 设置在驱动波形发生器的后续级中的反相滤波器至少将滤波器的频率特性校正到预定的频率特性，与要驱动的致动器的数量无关。

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：US20130064698A1

公开(公告)日：2013-03-14

申请号：US13610419

申请日：2012-09-11

申请人： Atsushi Oshima ,  Takahiro Matsuzaki ,  Kazuaki Uchida ,  Akio Kobayashi

发明人： Atsushi Oshima ,  Takahiro Matsuzaki ,  Kazuaki Uchida ,  Akio Kobayashi

IPC分类号： F04B11/00 ,  F04B17/03

CPC分类号： F04B43/046

摘要： A fluid feed pump is configured, such that a fluid is fed from an outlet channel of the fluid feed pump through an outlet buffer chamber to a fluid channel. The outlet buffer chamber is designed to have a higher compliance than a compliance of a pump chamber. The driving period of the fluid feed pump is set to a shorter period than a time constant defined by the compliance of the pump chamber and a flow resistance between an inlet of the outlet channel and an outlet of the fluid channel. This enables the fluid to be fed with high efficiency by taking advantage of the pressure oscillation occurring between the pump chamber and the outlet buffer chamber.

摘要翻译： 流体供给泵被构造成使得流体从流体供给泵的出口通道通过出口缓冲室供给到流体通道。 出口缓冲室被设计为具有比泵室的顺应性更高的顺应性。 流体供给泵的驱动周期被设定在比由泵室的顺应性所限定的时间常数和出口通道的入口与流体通道的出口之间的流动阻力之间的更短的周期。 这使得能够通过利用在泵室和出口缓冲室之间产生的压力振荡来高效地供给流体。

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：US08376486B2

公开(公告)日：2013-02-19

申请号：US12340895

申请日：2008-12-22

申请人： Noritaka Ide ,  Kunio Tabata ,  Atsushi Oshima ,  Shinichi Miyazaki ,  Hiroyuki Aizawa ,  Seiichi Taniguchi

发明人： Noritaka Ide ,  Kunio Tabata ,  Atsushi Oshima ,  Shinichi Miyazaki ,  Hiroyuki Aizawa ,  Seiichi Taniguchi

IPC分类号： B41J29/38 ,  H03F3/38

CPC分类号： B41J2/04501 ,  B41J2/04508 ,  B41J2/04541 ,  B41J2/04581 ,  B41J2/04593 ,  B41J2/04596 ,  B41J2/07 ,  H01L41/042 ,  H03F3/2175

摘要： A liquid jet apparatus according to the present invention includes a drive waveform generator adapted to generate a drive waveform signal, a modulator adapted to execute pulse modulation on the drive waveform signal, a digital power amplifier adapted to power-amplify the modulated signal, on which the pulse modulation is executed by the modulator, with a pair of switching elements push-pull coupled with each other, a low pass filter adapted to smooth the amplified digital signal obtained by the power-amplification of the digital power amplifier, and a modulation period modification circuit adapted to modify a modulation period of the pulse modulation of the modulator based on data of the drive waveform signal.

摘要翻译： 根据本发明的液体喷射装置包括适于产生驱动波形信号的驱动波形发生器，适于对驱动波形信号执行脉冲调制的调制器，适于对已调制信号进行功率放大的数字功率放大器， 脉冲调制由调制器执行，一对开关元件彼此相互推挽，一个适合于平滑由数字功率放大器的功率放大而获得的放大数字信号的低通滤波器，以及调制周期 修改电路，其适于基于所述驱动波形信号的数据修改所述调制器的脉冲调制的调制周期。

公开(公告)号：US07733531B2

公开(公告)日：2010-06-08

申请号：US11333719

申请日：2006-01-17

申请人： Toru Takahashi ,  Atsushi Oshima

发明人： Toru Takahashi ,  Atsushi Oshima

IPC分类号： G06K15/00

CPC分类号： H04N1/4052

摘要： An image processing apparatus includes: an image data acquiring unit that acquires image data formed of plural pixel data having an M-ary (M≧3) gradation value; a grouping unit that divides the image data acquired into J (J≧2) image data areas and sections the J image data areas into K (2≦K≦J) groups; a pixel data selecting unit that selects, for each of the image data areas forming the respective groups, predetermined pixel data out of pixel data included in the image data area; an N-arization processing unit that applies the N-arization (M>N≧2) processing to the pixel data selected on the basis of a predetermined threshold value; and an error diffusing unit that diffuses a difference between a value of the selected pixel data and a value after the N-arization processing for the selected pixel data to pixel data not subjected to the N-arization processing, wherein the error diffusing unit diffuses the difference in directions different from one another in two or more groups of the K groups.

摘要翻译： 一种图像处理装置，包括：图像数据获取单元，其获取由具有M元（M≥3）灰度值的多个像素数据形成的图像数据; 分割单元，将获取的图像数据分割为J（J≥2）个图像数据区域，并将J个图像数据区域分割成K（2＆amp; NlE; K＆n; E; J）组; 像素数据选择单元，对于构成各个组的每个图像数据区域，从包括在图像数据区域中的像素数据中选择预定像素数据; 一个N值化处理单元，其对基于预定阈值选择的像素数据应用N值化（M>N≥2）处理; 以及误差扩散单元，其将所选择的像素数据的值和所选择的像素数据的N次化处理后的值之间的差扩散到未进行N值化处理的像素数据，其中，所述误差扩散单元将 两组或更多组K组的方向差异不同。