公开(公告)号：US20230302800A1

公开(公告)日：2023-09-28

申请号：US18123364

申请日：2023-03-20

申请人： Yudai YUMOTO ,  Takahiro YOSHIDA

发明人： Yudai YUMOTO ,  Takahiro YOSHIDA

IPC分类号： B41J2/14

CPC分类号： B41J2/1433 ,  B41J2/14201

摘要： A liquid discharge head includes: a nozzle plate having multiple nozzles from each of which a liquid is to be discharged; and a gap in each end of the nozzle plate in a longitudinal direction of the nozzle plate. The multiple nozzles are divided into P numbers of sub-nozzle groups, each of the sub-nozzle groups including the multiple nozzles as multiple sub-nozzles, where P is an integer of one or more, the multiple sub-nozzles are arrayed in the longitudinal direction at first intervals of d×P where d is a recording resolution and P is a number of the sub-nozzle groups, the sub-nozzle groups respectively include sub-nozzle rows respectively including the multiple sub-nozzles arrayed at the first intervals of d×P in the longitudinal direction.

公开(公告)号：US11148417B2

公开(公告)日：2021-10-19

申请号：US16916773

申请日：2020-06-30

申请人： Takahiro Yoshida

发明人： Takahiro Yoshida

IPC分类号： B41J2/045 ,  B41J2/155

摘要： A liquid discharge apparatus includes a liquid discharge head to discharge liquid and control circuitry to generate a drive waveform including drive pulses applied to the head. The drive waveform includes a non-discharge pulse not to discharge the liquid and a discharge pulse to discharge the liquid. The non-discharge pulse and the discharge pulse are serial in time in the drive waveform. Td is in a range of Tc−0.2×Tc to Tc+0.45×Tc. Vp1 is in a range of −10% to +10% of Vpp1. Td represents a time interval between the non-discharge pulse and the discharge pulse. Tc represents a natural vibration period of a pressure chamber of the head. Vp1 represents a peak value of the non-discharge pulse. Vpp1 represents a peak value of the non-discharge pulse at which a droplet speed of liquid discharged by the discharge pulse takes a local minimum value.

公开(公告)号：US10981380B2

公开(公告)日：2021-04-20

申请号：US16728015

申请日：2019-12-27

申请人： Takahiro Yoshida

发明人： Takahiro Yoshida

IPC分类号： B41J2/14

摘要： A liquid discharge head includes a plurality of nozzles through which a liquid is discharged, the plurality of nozzles arrayed in a nozzle array direction, a plurality of pressure chambers respectively communicating with the plurality of nozzles, a plurality of individual channels respectively communicating with the plurality of pressure chambers, a common channel communicating with each of the plurality of individual channels, an individual-channel member including the plurality of pressure chambers and the plurality of individual channels, a common-channel member including the common channel, and a partition between the individual-channel member and the common-channel member. The partition includes a plurality of through-hole regions each connecting the common channel and the plurality of individual channels, and a plurality of recoverably-deformable regions facing the common channel.

公开(公告)号：US10994533B2

公开(公告)日：2021-05-04

申请号：US16356021

申请日：2019-03-18

申请人： Takahiro Yoshida

发明人： Takahiro Yoshida

IPC分类号： B41J2/045 ,  B41J2/14

摘要： A liquid discharge device includes a liquid discharge head including a plurality of liquid chambers respectively communicating with a plurality of nozzles and circulating liquid therethrough. Each liquid chamber is provided with a pressure generator for discharging the liquid from a corresponding nozzle. The liquid discharge device further includes a waveform data memory to store drive waveform data including discharge drive waveform data for discharging the liquid according to image data and micro-vibration drive waveform data for causing a micro vibration of a meniscus of the liquid discharge head. The liquid discharge device further includes circuitry configured to generate a drive waveform based on the drive waveform data; apply, to the pressure generator, a discharge drive waveform based on the discharge drive waveform data, in a printing area; and apply, to the pressure generator, a micro-vibration drive waveform based on the micro-vibration drive waveform data, in a non-print area.

公开(公告)号：US20220250392A1

公开(公告)日：2022-08-11

申请号：US17660705

申请日：2022-04-26

申请人： Tomohiko KOHDA ,  Takahiro YOSHIDA ,  Shiomi ANDOU ,  Takayuki NAKAI ,  Kanshi ABE ,  Takeshi SHIMIZU ,  Ryo KASAHARA

发明人： Tomohiko KOHDA ,  Takahiro YOSHIDA ,  Shiomi ANDOU ,  Takayuki NAKAI ,  Kanshi ABE ,  Takeshi SHIMIZU ,  Ryo KASAHARA

IPC分类号： B41J2/18 ,  B41J2/175 ,  B41J2/14

摘要： A liquid discharging head includes a nozzle plate having a plurality of nozzles from which liquid is discharged; a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; a common liquid chamber that supplies liquid to the plurality of individual liquid chambers; and a circulation common liquid chamber that leads to a plurality of circulation channels. A part of the common liquid chamber overlaps the circulation common liquid chamber from a direction in which liquid is discharged from the nozzles, and another part of the common liquid chamber overlaps the circulation common liquid chamber from a direction orthogonal to both the direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.

公开(公告)号：US20220169020A1

公开(公告)日：2022-06-02

申请号：US17516723

申请日：2021-11-02

申请人： Takahiro YOSHIDA

发明人： Takahiro YOSHIDA

IPC分类号： B41J2/045

摘要： A liquid discharge apparatus includes a liquid discharge head configured to discharge a liquid, and a drive waveform generator configured to generate a drive waveform to be applied to the liquid discharge head, the drive waveform including a first discharge pulse to cause the liquid discharge head to discharge the liquid, a second discharge pulse after the first discharge pulse, the second discharge pulse to cause the liquid discharge head to discharge the liquid, and a pulse interval between the first discharge pulse and the second discharge pulse, the pulse interval being equal to a time period in which the liquid is discharged by the second discharge pulse in a damping state in which the second discharge pulse is damped by a meniscus vibration generated by the first discharge pulse.

公开(公告)号：US10981382B2

公开(公告)日：2021-04-20

申请号：US16601929

申请日：2019-10-15

申请人： Takahiro Yoshida

发明人： Takahiro Yoshida

IPC分类号： B41J2/14 ,  B41J2/18

摘要： A liquid discharge head includes a plurality of nozzles from which a liquid is discharged, the plurality of nozzles arrayed in one direction, a plurality of pressure chambers communicating with the plurality of nozzles, respectively, the plurality of pressure chambers arrayed in the one direction, a common supply channel communicating with each of the plurality of pressure chambers, a common collection channel communicating with each of the plurality of pressure chambers, and a damper disposed outside an array of the plurality of pressure chambers in the one direction, and configured to form an inner surface of at least one of the common supply channel and the common collection channel.

公开(公告)号：US20210001629A1

公开(公告)日：2021-01-07

申请号：US16916773

申请日：2020-06-30

申请人： Takahiro YOSHIDA

发明人： Takahiro YOSHIDA

IPC分类号： B41J2/045 ,  B41J2/155

摘要： A liquid discharge apparatus includes a liquid discharge head to discharge liquid and control circuitry to generate a drive waveform including drive pulses applied to the head. The drive waveform includes a non-discharge pulse not to discharge the liquid and a discharge pulse to discharge the liquid. The non-discharge pulse and the discharge pulse are serial in time in the drive waveform. Td is in a range of Tc−0.2×Tc to Tc+0.45×Tc. Vp1 is in a range of −10% to +10% of Vpp1. Td represents a time interval between the non-discharge pulse and the discharge pulse. Tc represents a natural vibration period of a pressure chamber of the head. Vp1 represents a peak value of the non-discharge pulse. Vpp1 represents a peak value of the non-discharge pulse at which a droplet speed of liquid discharged by the discharge pulse takes a local minimum value.

公开(公告)号：US20240246337A1

公开(公告)日：2024-07-25

申请号：US18415706

申请日：2024-01-18

申请人： Takahiro YOSHIDA

发明人： Takahiro YOSHIDA

IPC分类号： B41J2/14

CPC分类号： B41J2/14274 ,  B41J2002/14306 ,  B41J2002/14419

摘要： A liquid discharge head includes a nozzle plate, a channel substrate, a frame, and a vibration attenuator. The nozzle plate has multiple nozzles from which a liquid is discharged in a liquid discharge direction. The channel substrate has multiple individual liquid chambers communicating with the multiple nozzles, respectively. The frame has a first end adjacent to the channel substrate, a second end opposite the first end in the liquid discharge direction, and a common liquid chamber between the first end and the second end and communicating with the multiple individual liquid chambers. The vibration attenuator is disposed between the first end and the second end in the common liquid chamber. The vibration attenuator has a through hole through which the liquid flows in the common liquid chamber.

公开(公告)号：US20230302801A1

公开(公告)日：2023-09-28

申请号：US18123373

申请日：2023-03-20

申请人： Takahiro YOSHIDA

发明人： Takahiro YOSHIDA

IPC分类号： B41J2/14 ,  B41J2/145

CPC分类号： B41J2/1433 ,  B41J2/145

摘要： A liquid discharge head includes: a nozzle plate having multiple nozzles arrayed at a predetermined pitch (d) corresponding to a recording resolution in a longitudinal direction of the nozzle plate. The multiple nozzles are divided into P number of sub-nozzle groups, each of the P number of sub-nozzle groups including the multiple nozzles as multiple sub-nozzles, where P is an integer of one or more, the multiple sub-nozzles are arrayed in the longitudinal direction at a first interval of (d×P), and each of the P number of sub-nozzle groups includes sub-nozzle rows each including the multiple sub-nozzles arrayed at the first interval of in the longitudinal direction and in a first inclination direction inclined relative to the longitudinal direction and a transverse direction orthogonal to the longitudinal direction.