Seiko Epson Corporation

Ngk Insulators, Inc.

Other

Takahiro Katakura

Minoru Usui

Shinichi Nakamura

Toshiro Murayama

Keigo Sugai

Hirofumi Sakai

Junichi Sano

Motonori Okumura

Satoshi Shinada

Munehide Kanaya

Tsuyoshi Kitahara

Nobuaki Ito

Toshiki Usui

Takanori Aimono

Shotaro Tamai

Kazumi Kamoi

Hisashi Miyazawa

Takeo Seino

Takahiro Naka

Kazuhiko Hara

Tomoaki Abe

Kaoru Momose

Norihiko Kurashima

Atsushi Kobayashi

Toshio Kumagai

Fujio Akahane

Kazunaga Suzuki

Atsushi Toyofuku

Tomoaki Takahashi

Nobuo Takahashi

Shinri Sakai

Kenji Tsukada

Shuji Yonekubo

Nagamitsu Takashima

Koji Morikoshi

Tatsuo Furuta

Yuji Tanaka

Yoshikatsu Yamamoto

Takaichi Wada

Yukihisa Takeuchi

Taku Ishizawa

Hitotoshi Kimura

Seiji Mochizuki

Takao Kobayashi

Masahiko Yoshida

Noriaki Okazawa

Masanao Matsuzawa

Takakazu Fukano

Nobuo Watanabe

Masahide Matsuyama

Hideki Oikawa

Hideaki Sonehara

Osamu Nakamura

Chang Junhua

Yoshio Miyazawa

Yasunao Uehara

Kohji Watanabe

Yuta Okawa

Kazuhiko Miura

Toshiaki Kakutani

Tsuyoshi Sano

Kiyohiko Takemoto

Yuma Fukuzawa

Satoru Hosono

Shinsuke Yano

Shunya Fukuda

Yoshinori Miyazawa

Toshihisa Saruta

Shinji Yasukawa

Junhua Zhang

Natsumi Shimogawa

Tomohiro Sayama

Kazumichi Shimada

Tomoyuki Kamakura

Katsumori Takei

Takeshi Miyashita

Hitoshi Takaai

Junhua Chang

Teruhito Kojima

Takayoshi Katsumura

Yuichi Nakamura

Tetsuhiko Takeuchi

Katsuhiko Iida

Tomohiro Yamada

Kouichi Toba

Tohru Fukushima

Keizo Miyata

Hidenori Omae

Naomi Serizawa

Toshiaki Ohshima

Makoto Fujita

Syunka Cho

Yasushi Kishida

A determination method of determining a supply signal to be supplied to a first electrode and a second electrode includes an acquisition step of acquiring, when a predetermined condition is satisfied, first information regarding a liquid ejection characteristic when a first constant potential signal of a first potential is supplied to the second electrode, and second information regarding a liquid ejection characteristic when a second constant potential signal of a second potential different from the first potential is supplied to the second electrode, and a determination step of determining, based on the first information and the second information, the supply signal to be supplied to the first electrode and the second electrode after the predetermined condition is satisfied.

Determination method and liquid ejecting apparatus

Provided is a drive method of a liquid discharging head including a first step of acquiring physical property information indicating a physical property of liquid in the liquid discharging head, a second step of determining a waveform of a drive signal based on the physical property information, a third step of forming a first liquid column by supplying a first waveform, which is included in a first drive signal among the drive signals having the waveforms determined in the second step, to a drive element, and a fourth step of, when the first liquid column is formed, forming a second liquid column by supplying a second waveform, which is included in a second drive signal among the drive signals having the waveforms determined in the second step, to the drive element, and thereafter discharging a part or all of liquid constituting the second liquid column as a droplet.

Drive method of liquid discharging head and liquid discharging apparatus

Provided is a drive method of a liquid discharging head including a first step of forming a first liquid column by supplying a drive signal having a first waveform to a drive element, and a second step of, when the first liquid column is formed, forming a second liquid column by supplying a drive signal having a second waveform to the drive element, and thereafter discharging a part or all of liquid constituting the second liquid column as a droplet, in which when a drive signal having the first waveform but not having the second waveform is supplied to the drive element, a droplet is not discharged from the discharging portion, and when a drive signal having the second waveform but not having the first waveform is supplied to the drive element, a droplet is not discharged from the discharging portion.

A driving waveform determining method with which a waveform of a driving pulse applied to a driving element provided in a liquid ejecting head that ejects a liquid is determined includes: a first step of determining a waveform candidate of the driving pulse; a second step of notifying a user of candidate information of the waveform candidate; a third step of receiving an instruction issued by the user in accordance with the candidate information; and a fourth step of determining the waveform of the driving pulse in accordance with the instruction.

Driving waveform determining method, non-transitory computer-readable storage medium storing driving waveform determining program, liquid ejecting apparatus, and driving waveform determining system

A waveform determination method is disclosed that includes acquiring second timing information regarding a timing at which the flight distance of the droplet reaches the first distance when each of the plurality of waveform candidates indicated by the second waveform information is used, and a determination step of determining a waveform of each of the first drive pulse and the second drive pulse based on the first timing information and the second timing information.

Drive waveform determination method, non-transitory computer-readable storage medium storing drive waveform determination program, and drive waveform determination system

A driving waveform determining method with which a waveform of a driving pulse applied to a driving element provided in a liquid ejecting head that ejects a liquid is determined includes: a first step of measuring, by performing a simulation, ejection characteristics of the liquid from the liquid ejecting head when a waveform candidate is used for the driving pulse; a second step of measuring, by performing an actual measurement, the ejection characteristics of the liquid from the liquid ejecting head when the waveform candidate is used for the driving pulse; and a third step of determining the waveform of the driving pulse in accordance with a measurement result obtained in the first step and a measurement result obtained in the second step.

A communication plate in which are provided a first communication channel communicating with the first pressure chamber and the second pressure chamber and a first common liquid chamber communicating with the first pressure chamber and the second pressure chamber at positions different from positions at which the first communication channel communicates with the first pressure chamber and the second pressure chamber, and a nozzle substrate in which a first nozzle communicating with the first pressure chamber and the second pressure chamber in common via the first communication channel is provided. A second communication channel communicating with the first common liquid chamber and communicating with the first pressure chamber and the second pressure chamber in common is provided in the pressure chamber substrate or the communication plate.

Liquid ejecting head and liquid ejecting apparatus

A drive-waveform determination method determines a waveform of a first drive pulse to be applied to a drive element included in a first liquid discharging head that discharges liquid. The drive-waveform determination method includes: a first step of obtaining second waveform information regarding a waveform of a second drive pulse to be applied to a drive element included in a second liquid discharging head that discharges liquid; and a second step of determining the waveform of the first drive pulse, based on the second waveform information.

Drive-waveform determination method, non-transitory computer-readable storage medium storing drive-waveform determination program, liquid discharging apparatus, and drive-waveform determination system

The control portion controls (i) a discharging operation of discharging the liquid from the plurality of nozzles by driving the plurality of energy generation elements and (ii) a pressurization operation of pressurizing the liquid from the individual flow path side in a state in which the plurality of nozzles are sealed by the sealing portion.

Liquid discharging apparatus and liquid discharging method

A liquid ejecting apparatus has: a liquid discharge section configured to change an inner volume of a first pressure chamber communicating with a nozzle by a first piezoelectric element; a pressure vibration section configured to change an inner volume of a second pressure chamber by a second piezoelectric element; a driving signal generation section configured to generate a discharging driving signal for the first piezoelectric element and a detection driving signal for the second piezoelectric element; and a vibration detection section that detects residual vibration of a liquid filled in the second pressure chamber after the supply of the detection driving signal. The viscous resistance of a flow path between the second pressure chamber and the common flow path is lower than the viscous resistance of a flow path between the first pressure chamber and the common flow path.

Liquid ejecting apparatus

When a pressure of the liquid inside the common supply flow path is higher than a pressure of the liquid inside the pressure chamber, the adjustment portion changes the cross-sectional area to be a first cross-sectional area when a pressure difference, which is a difference between the pressure of the liquid inside the common supply flow path and the pressure of the liquid inside the pressure chamber, is a first pressure difference, and changes the cross-sectional area to be a second cross-sectional area larger than the first cross-sectional area when the pressure difference is a second pressure difference larger than the first pressure difference.

Liquid discharging head and liquid discharging apparatus

A liquid ejecting head includes: a nozzle array including nozzles via which liquid is to be discharged and which are arrayed in a first direction; a nozzle passage that leads to a nozzle and extends in a second direction intersecting the first direction; a first pressure chamber; a second pressure chamber disposed adjacent to the first pressure chamber in the first direction; a first communicating passage via which the first pressure chamber communicates with an interior of the nozzle passage and which extends in a third direction orthogonal to the first and second directions; and a second communicating passage via which the second pressure chamber communicates with the interior of the nozzle passage and which extends in the third direction. As viewed from the second direction, an inner wall surface of the first communicating passage positioned on a side of the second communicating passage includes a first inclined surface that extends in a fourth direction intersecting the first and third directions.

A liquid discharge method of discharging a liquid from a nozzle of a liquid discharge head by applying a drive pulse to a drive element of the liquid discharge head includes an acquisition step of acquiring a recording condition, and a driving step of applying the drive pulse to the drive element. The drive pulse includes a first potential, a second potential different from the first potential, and a third potential different from the first potential and the second potential. The second potential is to be applied after the first potential, and the third potential is to be applied after the second potential. In the liquid discharge method, in the driving step, the drive pulse in which a time of the third potential varies depending on the recording condition acquired in the acquisition step is applied to the drive element.

Liquid discharge method, non-transitory computer-readable storage medium storing drive pulse determination program, and liquid discharge apparatus

A liquid discharge method of discharging a liquid from a nozzle of a liquid discharge head by applying a drive pulse to a drive element of the liquid discharge head includes an acquisition step of acquiring a recording condition, and a driving step of applying the drive pulse to the drive element. The drive pulse includes a first potential, a second potential different from the first potential, and a third potential different from the first potential and the second potential. The second potential is to be applied after the first potential, and the third potential is to be applied after the second potential. In the liquid discharge method, in the driving step, the drive pulse in which a time of the second potential varies depending on the recording condition acquired in the acquisition step is applied to the drive element.

A liquid discharge method of discharging a liquid from a nozzle of a liquid discharge head by applying a drive pulse to a drive element of the liquid discharge head includes an acquisition step of acquiring a state of a dot formed on a recording medium by the liquid discharged from the nozzle, as a recording condition, and a driving step of applying the drive pulse that varies depending on the recording condition acquired in the acquisition step, to the drive element. The drive pulse may include a first potential, a second potential different from the first potential, and a third potential different from the first potential and the second potential. The second potential may be to be applied after the first potential, and the third potential may be to be applied after the second potential.

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Nagano, Japan

Takahiro Katakura