公开(公告)号：US09616662B2

公开(公告)日：2017-04-11

申请号：US14730423

申请日：2015-06-04

申请人： Naoko Kitaoka ,  Takahiro Yoshida

发明人： Naoko Kitaoka ,  Takahiro Yoshida

IPC分类号： B41J29/38 ,  B41J2/045

CPC分类号： B41J2/04588 ,  B41J2/04573 ,  B41J2/04581 ,  B41J2202/20

摘要： An image forming apparatus includes a liquid discharging head unit including multiple nozzles to discharge liquid droplets, individual liquid chambers communicated to the multiple nozzles, and pressure generating units to generate pressure applied to a liquid in the individual liquid chambers; and a head drive control unit to generate a common driving waveform including multiple discharging pulses arranged in time series within one driving cycle of discharging liquid droplets of the liquid, to select at least one of the multiple discharging pulses from the common driving waveform, and to apply the selected at least one of the discharging pulses to the pressure generating units. The common driving waveform, generated by the head drive control unit, include at least a first discharging pulse and a second discharging pulse for discharging liquid droplets of same size.

公开(公告)号：US09056460B2

公开(公告)日：2015-06-16

申请号：US14267040

申请日：2014-05-01

申请人： Shuusuke Iwata ,  Naoko Kitaoka

发明人： Shuusuke Iwata ,  Naoko Kitaoka

IPC分类号： B41J29/38 ,  B41J2/045

CPC分类号： B41J2/04588 ,  B41J2/04581 ,  B41J2/04593 ,  B41J2/04596

摘要： An image forming apparatus includes: a liquid droplet discharge head; a pressure generator; and a driving waveform generator configured to generate a driving waveform including a plurality of pulse units for driving the pressure generator for discharging a liquid droplet. The pulse unit includes one or more first pulses, and one or more second pulses arranged after the first pulses for discharging a liquid droplet. The second pulse has a pulse width that is set in advance to generate a resonance with the liquid droplet discharge head. The first pulse has a pulse width different from the pulse width of the second pulse.

摘要翻译： 图像形成装置包括：液滴喷射头; 压力发生器; 以及驱动波形发生器，被配置为产生包括用于驱动用于排出液滴的压力发生器的多个脉冲单元的驱动波形。 脉冲单元包括一个或多个第一脉冲，以及布置在用于排出液滴的第一脉冲之后的一个或多个第二脉冲。 第二脉冲具有预先设定的脉冲宽度，以产生与液滴喷射头的共振。 第一脉冲具有与第二脉冲的脉冲宽度不同的脉冲宽度。

公开(公告)号：US20140160193A1

公开(公告)日：2014-06-12

申请号：US14095253

申请日：2013-12-03

申请人： Shuusuke Iwata ,  Naoko Kitaoka ,  Satoru Tobita

发明人： Shuusuke Iwata ,  Naoko Kitaoka ,  Satoru Tobita

IPC分类号： B41J2/045

CPC分类号： B41J2/04588 ,  B41J2/04516 ,  B41J2/04581 ,  B41J2/04593

摘要： A droplet ejecting apparatus includes a recording head including nozzles, liquid chambers communicating with the respective nozzles and storing ink, and actuators for applying pressure to the respective liquid chambers; and a print control unit configured to generate drive signals for driving the respective actuators to eject droplets from the nozzles. The drive signal includes a first contracting waveform component for ejecting a droplet and a second contracting waveform component for further contracting the liquid chamber after application of the first contracting waveform component but not ejecting a droplet. The second contracting waveform component is output at oscillation-damping timing at which a pressure wave generated by the first contracting waveform component is damped, in a condition where an environmental temperature is high, and is output at resonating timing at which resonance with the generated pressure wave occurs, in a condition where the environmental temperature is low.

摘要翻译： 液滴喷射装置包括：记录头，包括喷嘴，与各个喷嘴连通的液体室和存储墨;以及用于向各个液体腔施加压力的致动器; 以及打印控制单元，被配置为产生用于驱动各个致动器以从喷嘴喷射液滴的驱动信号。 驱动信号包括用于喷射液滴的第一收缩波形分量和用于在施加第一收缩波形分量之后进一步收缩液体室而不喷射液滴的第二收缩波形分量。 第二收缩波形分量在环境温度高的条件下在由第一收缩波形分量产生的压力波被衰减的振荡阻尼定时输出，并且在与所产生的压力的共振的共振定时输出 在环境温度低的情况下发生波。

公开(公告)号：US20130070010A1

公开(公告)日：2013-03-21

申请号：US13610759

申请日：2012-09-11

申请人： Satoru TOBITA ,  Kunihiro Yamanaka ,  Naoko Kitaoka ,  Takashi Satou

发明人： Satoru TOBITA ,  Kunihiro Yamanaka ,  Naoko Kitaoka ,  Takashi Satou

IPC分类号： B41J29/38

CPC分类号： B41J29/38 ,  B41J2/04516 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/04593 ,  B41J2/04596

摘要： An image forming apparatus comprises a printing head unit, a driving waveform generator that generates and outputs a driving waveform having four or more driving pulses in chronological order per driving cycle, and a selector that selects and applies one of multiple driving pulses to a pressure generator to cause a printing head unit to selectively discharge a liquid droplet of three or more different sizes. The driving waveform includes three or more driving pulses at least having a final driving pulse to collectively discharge the biggest liquid droplet. The driving waveform includes a micro-driving pulse for discharging a smallest droplet within a time period of from about 2×Tc to about 4×Tc after the driving waveform starts being outputted when Tc represents a natural vibration period of a separate liquid chamber of the printing head unit.

摘要翻译： 图像形成装置包括打印头单元，驱动波形发生器，其根据驱动周期按时间顺序生成并输出具有四个或更多个驱动脉冲的驱动波形;以及选择器，其选择并施加多个驱动脉冲中的一个到压力发生器 以使打印头单元选择性地排出三种或更多种不同尺寸的液滴。 驱动波形包括至少具有最终驱动脉冲以共同排出最大液滴的三个或更多个驱动脉冲。 驱动波形包括用于在驱动波形开始输出之后在约2×Tc至约4×Tc的时间段内排出最小液滴的微驱动脉冲，当Tc表示输出的单独液体室的固有振动周期时 打印头单元。

公开(公告)号：US08303067B2

公开(公告)日：2012-11-06

申请号：US12881474

申请日：2010-09-14

申请人： Naoko Kitaoka

发明人： Naoko Kitaoka

IPC分类号： B41J29/38 ,  B41J2/045

CPC分类号： B41J2/04593 ,  B41J2/04581

摘要： An image forming apparatus includes a recording head having nozzles ejecting liquid droplets, a liquid chamber in communication with the nozzles, a pressure generator unit generating pressure inside the liquid chamber, and a head drive control unit to generate a drive waveform having plural drive pulses arranged in time series, each of the drive pulses having waveform components, to form an ejecting pulse for ejecting the liquid droplets by selecting one or more of the plural drive pulses based on a corresponding one of liquid droplet sizes and supply the formed ejecting pulse to the pressure generator unit. In the image forming apparatus, when the ejecting pulse is formed by selecting one or more of the plural drive pulses, shapes of the waveform components of the selected plural drive pulses are partially changed based on the corresponding one of the liquid droplet sizes.

摘要翻译： 图像形成装置包括具有喷射液滴的喷嘴的记录头，与喷嘴连通的液体室，在液体室内产生压力的压力发生器单元，以及头驱动控制单元，用于产生具有多个驱动脉冲的驱动波形， 在时间序列中，每个驱动脉冲具有波形分量，以基于相应的一个液滴尺寸选择多个驱动脉冲中的一个或多个来形成用于喷射液滴的喷射脉冲，并将形成的喷射脉冲提供给 压力发生器单元。 在图像形成装置中，当通过选择多个驱动脉冲中的一个或多个来形成喷射脉冲时，所选择的多个驱动脉冲的波形成分的形状基于相应的一个液滴尺寸而部分地改变。

公开(公告)号：US20160355011A1

公开(公告)日：2016-12-08

申请号：US15164200

申请日：2016-05-25

申请人： Kiminori MASUDA ,  Naoko Kitaoka ,  Satomi Araki

发明人： Kiminori MASUDA ,  Naoko Kitaoka ,  Satomi Araki

IPC分类号： B41J2/045

CPC分类号： B41J2/04588 ,  B41J2/04581

摘要： An inkjet recording method includes supplying ink to a recording head and applying at least one drive pulse to a pressure generating device in the recording head to generate a pressure in a liquid chamber in the recording head to discharge one or more droplets of the ink in the liquid chamber through a nozzle of a nozzle plate in the recording head, wherein the following two conditions are satisfied.The ink has a static surface tension of from 18.0 to 27.0 mN/m at 25 degrees C. Condition 1 The at least one drive pulse has a voltage changing portion for drawing in the ink, the voltage changing portion having a voltage changing time of one third or more of a resonance period of the liquid chamber Condition 2.

公开(公告)号：US20160144620A1

公开(公告)日：2016-05-26

申请号：US14939266

申请日：2015-11-12

申请人： Kiminori MASUDA ,  Akiko Bannai ,  Takashi Tamai ,  Naoko Kitaoka ,  Kohta Akiyama

发明人： Kiminori MASUDA ,  Akiko Bannai ,  Takashi Tamai ,  Naoko Kitaoka ,  Kohta Akiyama

IPC分类号： B41J2/045

CPC分类号： B41J2/04588 ,  B41J2/04573 ,  B41J2/04581 ,  B41J2/2107

摘要： An inkjet recording method performed by inkjet recording device including nozzle plate with nozzle to eject droplets of ink; recording head including liquid chamber with which the nozzle is in communication, and pressure-generating unit configured to generate pressure in the liquid chamber; and signal-generating unit configured to generate signal applied to the pressure-generating unit, and allowing the droplets of the ink to eject by the pressure generated by the pressure-generating unit according to the signal, wherein the ink has static surface tension of 18.0 mN/m to 27.0 mN/m at 25° C., the ink has receding contact angle on the nozzle plate of less than 50°, the signal has two-step pull pulse for pulling the ink into the nozzle in two-step manner within one printing unit cycle, and the method includes pulling the ink located in proximity to nozzle outlet into the nozzle of the two-step pull pulse, to form meniscus at predetermined position.

摘要翻译： 喷墨记录方法由喷墨记录装置执行，喷墨记录装置包括具有喷嘴的喷嘴板以喷射墨滴; 记录头，其包括与喷嘴连通的液体室;以及压力产生单元，被配置为在所述液体室中产生压力; 以及信号发生单元，被配置为产生施加到所述压力产生单元的信号，并且通过根据所述信号由所述压力产生单元产生的压力使所述墨水滴喷射，其中所述墨水具有18.0的静态表面张力 在25℃下mN / m至27.0mN / m，油墨在喷嘴板上具有小于50°的后退接触角，该信号具有两步拉伸脉冲，用于以两步方式将油墨拉入喷嘴 在一个印刷单元循环内，并且该方法包括将位于喷嘴出口附近的墨水拉入两步拉伸脉冲的喷嘴中，以在预定位置形成弯液面。

公开(公告)号：US09340013B2

公开(公告)日：2016-05-17

申请号：US14831202

申请日：2015-08-20

申请人： Naoko Kitaoka ,  Satomi Araki

发明人： Naoko Kitaoka ,  Satomi Araki

IPC分类号： B41J29/38 ,  B41J2/045

CPC分类号： B41J2/04588 ,  B41J2/04525 ,  B41J2/04581 ,  B41J2/04593 ,  B41J2/14274

摘要： An image forming apparatus includes a liquid discharge head including plural nozzles to discharge droplets; a plurality of individual liquid chambers; a pressure generator, and a head drive controller. A meniscus oscillation generated in the individual liquid chamber applied with the pressure by the pressure generator has a phase reverse to a phase of a meniscus oscillation generated in the adjacent individual liquid chamber not applied with the pressure by the pressure generator, the common drive waveform generated by the head drive controller includes a common discharge pulse used for forming droplets having at least two sizes and an noncommon discharge pulse used for forming one of the droplets having two sizes, and a pulse interval between the common discharge pulse and the noncommon discharge pulse located right before the common discharge pulse is a time area having a phase reverse to resonance.

摘要翻译： 图像形成装置包括：液体排出头，包括用于排出液滴的多个喷嘴; 多个单独的液体室; 压力发生器和头驱动控制器。 在由压力发生器施加压力的单个液体室中产生的弯液面振荡具有与在未被压力发生器施加压力的相邻独立液体室中产生的弯月面振荡的相位相反的相位，产生公共驱动波形 通过头驱动控制器包括用于形成具有至少两个尺寸的液滴的公共放电脉冲和用于形成具有两个尺寸的液滴中的一个的非常用放电脉冲，以及位于公共放电脉冲和非常用放电脉冲之间的脉冲间隔 在公共放电脉冲之前是具有与谐振相反的相位的时间区域。

公开(公告)号：US08657401B2

公开(公告)日：2014-02-25

申请号：US13610759

申请日：2012-09-11

申请人： Satoru Tobita ,  Kunihiro Yamanaka ,  Naoko Kitaoka ,  Takashi Satou

发明人： Satoru Tobita ,  Kunihiro Yamanaka ,  Naoko Kitaoka ,  Takashi Satou

IPC分类号： B41J29/38

CPC分类号： B41J29/38 ,  B41J2/04516 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/04593 ,  B41J2/04596

摘要： An image forming apparatus comprises a printing head unit, a driving waveform generator that generates and outputs a driving waveform having four or more driving pulses in chronological order per driving cycle, and a selector that selects and applies one of multiple driving pulses to a pressure generator to cause a printing head unit to selectively discharge a liquid droplet of three or more different sizes. The driving waveform includes three or more driving pulses at least having a final driving pulse to collectively discharge the biggest liquid droplet. The driving waveform includes a micro-driving pulse for discharging a smallest droplet within a time period of from about 2×Tc to about 4×Tc after the driving waveform starts being outputted when Tc represents a natural vibration period of a separate liquid chamber of the printing head unit.

摘要翻译： 图像形成装置包括打印头单元，驱动波形发生器，其根据驱动周期按时间顺序生成并输出具有四个或更多个驱动脉冲的驱动波形;以及选择器，其选择并施加多个驱动脉冲中的一个到压力发生器 以使打印头单元选择性地排出三种或更多种不同尺寸的液滴。 驱动波形包括至少具有最终驱动脉冲以共同排出最大液滴的三个或更多个驱动脉冲。 驱动波形包括用于在驱动波形开始输出之后在约2×Tc至约4×Tc的时间段内排出最小液滴的微驱动脉冲，当Tc表示输出的单独液体室的固有振动周期时 打印头单元。

公开(公告)号：US20230294402A1

公开(公告)日：2023-09-21

申请号：US18116316

申请日：2023-03-02

申请人： Naoko KITAOKA ,  Makoto TANAKA

发明人： Naoko KITAOKA ,  Makoto TANAKA

IPC分类号： B41J2/14 ,  B41J2/16

CPC分类号： B41J2/14233 ,  B41J2/1626 ,  B41J2/161

摘要： A liquid discharge head includes a nozzle from which a liquid is to be discharged; a pressure chamber communicating with the nozzle; a substrate defining a side wall the pressure chamber; a diaphragm having a surface on the substrate, the diaphragm defining a part of a wall of the pressure chamber and a part of the nozzle; and a piezoelectric element on another surface of the diaphragm opposite to the surface of the diaphragm on the substrate, the piezoelectric element including: a piezoelectric portion configured to vibrate; and a pair of electrodes sandwiching the piezoelectric portion between the pair of electrodes, and an area of at least one of the pair of electrodes of the piezoelectric element is larger than an area of the pressure chamber in a plane of the diaphragm.